/* Nihongo - Japanese Learning App
   Design: Modern minimal inspired by avoconsulting.no
*/

:root {
    /* Modern neutral palette - inspired by avoconsulting.no */
    --color-bg: #FAFAFA;
    --color-bg-warm: #F5F5F0;
    --color-bg-card: #FFFFFF;

    /* Clean neutrals */
    --color-sand: #EBEBEB;
    --color-sand-dark: #D9D9D9;
    --color-clay: #BFBFBF;
    --color-stone: #8C8C8C;

    /* Accent colors - vibrant Avo-inspired palette */
    --color-primary: #1A7F64;          /* Forest/Emerald green - primary */
    --color-primary-light: #2D9D7E;
    --color-terracotta: #1A7F64;       /* Alias for primary */
    --color-terracotta-light: #2D9D7E;
    --color-sage: #5BA8C0;             /* Sky blue */
    --color-sage-light: #8BC8E0;
    --color-ochre: #F97316;            /* Hot orange accent */
    --color-pink: #EC4899;             /* Hot pink accent */
    --color-light-green: #A3E635;      /* Light green accent */

    /* Text colors - high contrast */
    --color-text: #1A1A1A;
    --color-text-secondary: #4A4A4A;
    --color-text-muted: #8C8C8C;

    /* Semantic colors */
    --color-success: #1A7F64;
    --color-success-light: #E5F5F0;
    --color-error: #DC2626;
    --color-error-light: #FEE2E2;

    /* Typography */
    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-japanese: 'Noto Sans JP', 'Hiragino Sans', 'Yu Gothic', sans-serif;

    /* Spacing */
    --space-xs: 0.25rem;
    --space-sm: 0.5rem;
    --space-md: 1rem;
    --space-lg: 1.5rem;
    --space-xl: 2rem;
    --space-2xl: 3rem;

    /* Border radius - more rounded for modern look */
    --radius-sm: 6px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-full: 9999px;

    /* Shadows - subtler */
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.04);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.08);
    --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.12);

    /* Transitions - smooth */
    --transition-fast: 150ms ease;
    --transition-normal: 200ms ease;
}

/* Reset & Base */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: var(--font-sans);
    background-color: var(--color-bg);
    color: var(--color-text);
    line-height: 1.6;
    min-height: 100vh;
}

#root {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* Typography */
h1, h2, h3, h4 {
    font-weight: 500;
    line-height: 1.3;
    color: var(--color-text);
}

h1 {
    font-size: 1.75rem;
    letter-spacing: -0.02em;
}

h2 {
    font-size: 1.375rem;
    letter-spacing: -0.01em;
}

h3 {
    font-size: 1.125rem;
}

.japanese {
    font-family: var(--font-japanese);
}

.kanji-display {
    font-family: var(--font-japanese);
    font-size: 3.5rem;
    font-weight: 400;
    line-height: 1.2;
    letter-spacing: 0.02em;
}

.reading-display {
    font-family: var(--font-japanese);
    font-size: 1.25rem;
    color: var(--color-text-secondary);
}

.furigana {
    font-family: var(--font-japanese);
    font-size: 0.75rem;
    color: var(--color-text-muted);
}

/* Layout */
.app-container {
    width: 100%;
    max-width: 900px;
    margin: 0 auto;
    padding: var(--space-lg);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

.app-container-full {
    max-width: 900px;
    margin: 0 auto;
    padding: var(--space-lg);
}

.app-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--space-md) 0;
    margin-bottom: var(--space-lg);
    border-bottom: 1px solid var(--color-sand);
    width: 100%;
    min-height: 60px;
}

.app-logo {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--color-text);
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    flex-shrink: 0;
}

.app-logo-kanji {
    font-family: var(--font-japanese);
    font-size: 1.75rem;
    font-weight: 500;
    color: var(--color-terracotta);
    letter-spacing: 0.05em;
}

/* Navigation - Rounded pill style */
.nav-tabs {
    display: flex;
    gap: var(--space-xs);
    background: var(--color-bg-warm);
    padding: 6px;
    border-radius: var(--radius-full);
}

.nav-tab {
    padding: 8px 16px;
    border: none;
    background: transparent;
    color: var(--color-text-secondary);
    font-family: var(--font-sans);
    font-size: 0.875rem;
    font-weight: 500;
    border-radius: var(--radius-full);
    cursor: pointer;
    transition: all var(--transition-normal);
}

.nav-tab:hover {
    color: var(--color-text);
    background: var(--color-sand);
}

.nav-tab.active {
    background: var(--color-bg-card);
    color: var(--color-text);
    box-shadow: var(--shadow-sm);
}

/* Muted navigation during study/quiz sessions */
.nav-muted {
    opacity: 0.5;
    transition: opacity var(--transition-normal);
}

.nav-muted:hover {
    opacity: 0.85;
}

.session-active {
    border-bottom: 1px solid var(--color-sand);
    padding-bottom: var(--space-md);
    margin-bottom: var(--space-md);
}

.session-active .app-logo {
    opacity: 0.7;
}

.session-active .app-logo:hover {
    opacity: 1;
}

/* Cards - More rounded */
.card {
    background: var(--color-bg-card);
    border-radius: 20px;
    padding: var(--space-xl);
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--color-sand);
}

.card-header {
    margin-bottom: var(--space-lg);
}

.card-title {
    font-size: 1rem;
    font-weight: 500;
    color: var(--color-text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

/* Buttons - Modern rounded style */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-sm);
    padding: 10px 20px;
    border: none;
    border-radius: var(--radius-full);
    font-family: var(--font-sans);
    font-size: 0.9375rem;
    font-weight: 500;
    cursor: pointer;
    transition: all var(--transition-normal);
    user-select: none;
}

.btn-primary {
    background: var(--color-primary);
    color: white;
}

.btn-primary:hover {
    background: var(--color-primary-light);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.btn-secondary {
    background: var(--color-sand);
    color: var(--color-text);
}

.btn-secondary:hover {
    background: var(--color-sand-dark);
    transform: translateY(-1px);
}

.btn-ghost {
    background: transparent;
    color: var(--color-text-secondary);
}

.btn-ghost:hover {
    background: var(--color-sand);
    color: var(--color-text);
}

.btn-success {
    background: var(--color-success);
    color: white;
}

.btn-success:hover {
    background: var(--color-primary-light);
    transform: translateY(-1px);
}

.btn-error {
    background: var(--color-error);
    color: white;
}

.btn-error:hover {
    background: #EF4444;
    transform: translateY(-1px);
}

.btn-large {
    padding: var(--space-md) var(--space-xl);
    font-size: 1rem;
}

.btn:disabled {
    opacity: 0.3;
    cursor: not-allowed;
    transform: none;
}

/* Colored Labels/Tags - Avo-inspired */
.label {
    display: inline-flex;
    align-items: center;
    padding: 4px 12px;
    border-radius: var(--radius-full);
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.label-green {
    background: #DCFCE7;
    color: #166534;
}

.label-blue {
    background: #DBEAFE;
    color: #1E40AF;
}

.label-pink {
    background: #FCE7F3;
    color: #9D174D;
}

.label-orange {
    background: #FFEDD5;
    color: #9A3412;
}

.label-gray {
    background: var(--color-sand);
    color: var(--color-text-secondary);
}

/* Input */
.input {
    width: 100%;
    padding: var(--space-sm) var(--space-md);
    border: 1px solid var(--color-sand-dark);
    border-radius: var(--radius-sm);
    font-family: var(--font-sans);
    font-size: 1rem;
    color: var(--color-text);
    background: var(--color-bg-card);
    transition: all var(--transition-fast);
}

.input:focus {
    outline: none;
    border-color: var(--color-terracotta);
    box-shadow: 0 0 0 3px var(--color-terracotta-light);
}

.input-japanese {
    font-family: var(--font-japanese);
    font-size: 1.25rem;
}

/* Progress Bar */
.progress-bar {
    height: 8px;
    background: var(--color-sand);
    border-radius: 4px;
    overflow: hidden;
}

.progress-bar-fill {
    height: 100%;
    background: var(--color-sage);
    border-radius: 4px;
    transition: width var(--transition-normal);
}

/* Stats Grid */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
    gap: var(--space-md);
}

.stat-card {
    background: var(--color-bg-card);
    border-radius: var(--radius-md);
    padding: var(--space-lg);
    text-align: center;
    border: 1px solid var(--color-sand);
}

.stat-value {
    font-size: 2rem;
    font-weight: 600;
    color: var(--color-text);
    line-height: 1.2;
}

.stat-label {
    font-size: 0.8125rem;
    color: var(--color-text-muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-top: var(--space-xs);
}

.stat-value.success {
    color: var(--color-success);
}

.stat-value.warning {
    color: var(--color-ochre);
}

/* Study Session */
.study-container {
    display: flex;
    flex-direction: column;
    align-items: center;
    min-height: 70vh;
    padding: var(--space-xl) 0;
    max-width: 900px;
    margin: 0 auto;
}

.quiz-container-centered {
    justify-content: center;
}

.study-card {
    width: 100%;
    max-width: 500px;
    background: var(--color-bg-card);
    border-radius: 24px;
    padding: var(--space-2xl);
    box-shadow: var(--shadow-md);
    text-align: center;
}

.study-progress {
    margin-bottom: var(--space-lg);
}

.study-progress-text {
    font-size: 0.875rem;
    color: var(--color-text-muted);
    margin-bottom: var(--space-sm);
}

.study-word {
    margin: var(--space-2xl) 0;
}

.study-meaning {
    font-size: 1.25rem;
    color: var(--color-text);
    margin-top: var(--space-md);
}

.study-sentence {
    font-family: var(--font-japanese);
    font-size: 1.25rem;
    color: var(--color-text);
    line-height: 1.6;
}

.study-sentence-meaning {
    font-size: 1rem;
    color: var(--color-text-secondary);
    margin-top: var(--space-sm);
}

.study-input {
    margin: var(--space-xl) 0;
}

.study-actions {
    display: flex;
    gap: var(--space-md);
    justify-content: center;
    margin-top: var(--space-xl);
}

.study-feedback {
    margin-top: var(--space-lg);
    padding: var(--space-lg);
    border-radius: var(--radius-md);
}

.study-feedback.correct {
    background: var(--color-success-light);
    color: var(--color-success);
}

.study-feedback.incorrect {
    background: var(--color-error-light);
}

.study-feedback .correct-answer {
    font-family: var(--font-japanese);
    font-size: 1.25rem;
    color: var(--color-text);
    margin-top: var(--space-sm);
}

/* Mnemonic Field */
.mnemonic-section {
    margin-top: var(--space-xl);
    padding-top: var(--space-lg);
    border-top: 1px solid var(--color-sand);
    text-align: left;
}

.mnemonic-label {
    font-size: 0.8125rem;
    color: var(--color-text-muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: var(--space-sm);
}

.mnemonic-input {
    width: 100%;
    min-height: 80px;
    padding: var(--space-md);
    border: 1px dashed var(--color-sand-dark);
    border-radius: var(--radius-sm);
    font-family: var(--font-sans);
    font-size: 0.9375rem;
    color: var(--color-text);
    background: var(--color-bg-warm);
    resize: vertical;
}

.mnemonic-input:focus {
    outline: none;
    border-color: var(--color-terracotta);
    border-style: solid;
}

/* Word List */
.word-list {
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
}

.word-item {
    display: flex;
    align-items: center;
    gap: var(--space-md);
    padding: var(--space-md) var(--space-lg);
    background: var(--color-bg-card);
    border: 1px solid var(--color-sand);
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
    cursor: pointer;
}

.word-item:hover {
    background: var(--color-bg-warm);
    border-color: var(--color-sand-dark);
}

.word-item-kanji {
    font-family: var(--font-japanese);
    font-size: 1.5rem;
    font-weight: 500;
    min-width: 80px;
}

.word-item-reading {
    font-family: var(--font-japanese);
    font-size: 0.875rem;
    color: var(--color-text-secondary);
}

.word-item-meaning {
    flex: 1;
    font-size: 0.9375rem;
    color: var(--color-text);
}

.word-item-badge {
    padding: 4px 10px;
    font-size: 0.6875rem;
    font-weight: 600;
    border-radius: var(--radius-full);
    text-transform: uppercase;
    letter-spacing: 0.03em;
}

.word-item-badge.unlearned {
    background: var(--color-sand);
    color: var(--color-text-secondary);
}

.word-item-badge.learning {
    background: #FFEDD5;
    color: #9A3412;
}

.word-item-badge.known {
    background: #DCFCE7;
    color: #166534;
}

/* Settings */
.settings-section {
    margin-bottom: var(--space-xl);
}

.settings-section h3 {
    margin-bottom: var(--space-md);
    padding-bottom: var(--space-sm);
    border-bottom: 1px solid var(--color-sand);
}

.setting-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--space-md) 0;
}

.setting-label {
    font-size: 0.9375rem;
    color: var(--color-text);
}

.setting-description {
    font-size: 0.8125rem;
    color: var(--color-text-muted);
    margin-top: var(--space-xs);
}

.setting-input {
    width: 80px;
    text-align: center;
}

.setting-select {
    width: auto;
    min-width: 180px;
    padding-right: var(--space-lg);
}

/* Toggle Switch */
.toggle {
    position: relative;
    width: 48px;
    height: 28px;
}

.toggle input {
    opacity: 0;
    width: 0;
    height: 0;
}

.toggle-slider {
    position: absolute;
    cursor: pointer;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: var(--color-sand-dark);
    border-radius: 14px;
    transition: var(--transition-fast);
}

.toggle-slider:before {
    position: absolute;
    content: "";
    height: 22px;
    width: 22px;
    left: 3px;
    bottom: 3px;
    background-color: white;
    border-radius: 50%;
    transition: var(--transition-fast);
}

.toggle input:checked + .toggle-slider {
    background-color: var(--color-terracotta);
}

.toggle input:checked + .toggle-slider:before {
    transform: translateX(20px);
}

/* Modals */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(61, 56, 51, 0.4);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    animation: fadeIn var(--transition-fast);
}

.modal {
    background: var(--color-bg-card);
    border-radius: 24px;
    padding: var(--space-xl);
    max-width: 400px;
    width: 90%;
    box-shadow: var(--shadow-lg);
    animation: slideUp var(--transition-normal);
}

.modal-title {
    font-size: 1.25rem;
    margin-bottom: var(--space-md);
}

.modal-content {
    color: var(--color-text-secondary);
    margin-bottom: var(--space-xl);
}

.modal-actions {
    display: flex;
    gap: var(--space-md);
    justify-content: flex-end;
}

/* Animations */
@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

@keyframes slideUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Stack Tabs */
.stack-tabs {
    display: flex;
    gap: var(--space-md);
    margin-bottom: var(--space-lg);
}

.stack-tab {
    flex: 1;
    padding: var(--space-md);
    background: var(--color-bg-warm);
    border: 2px solid transparent;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition-fast);
    text-align: center;
}

.stack-tab:hover {
    background: var(--color-sand);
}

.stack-tab.active {
    border-color: var(--color-terracotta);
    background: var(--color-bg-card);
}

.stack-tab-count {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--color-text);
}

.stack-tab-label {
    font-size: 0.8125rem;
    color: var(--color-text-muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

/* Search */
.search-bar {
    position: relative;
    margin-bottom: var(--space-lg);
}

.search-input {
    width: 100%;
    padding: var(--space-md) var(--space-lg);
    padding-left: 48px;
    border: 1px solid var(--color-sand-dark);
    border-radius: var(--radius-lg);
    font-size: 1rem;
    background: var(--color-bg-card);
}

.search-icon {
    position: absolute;
    left: var(--space-lg);
    top: 50%;
    transform: translateY(-50%);
    color: var(--color-text-muted);
}

/* Empty State */
.empty-state {
    text-align: center;
    padding: var(--space-2xl);
    color: var(--color-text-muted);
}

.empty-state-icon {
    font-size: 3rem;
    margin-bottom: var(--space-md);
    opacity: 0.5;
}

/* Word Detail Modal */
.word-detail {
    text-align: center;
}

.word-detail-kanji {
    font-family: var(--font-japanese);
    font-size: 4rem;
    font-weight: 400;
    margin-bottom: var(--space-sm);
}

.word-detail-reading {
    font-family: var(--font-japanese);
    font-size: 1.25rem;
    color: var(--color-text-secondary);
    margin-bottom: var(--space-md);
}

.word-detail-meaning {
    font-size: 1.25rem;
    color: var(--color-text);
    margin-bottom: var(--space-lg);
    padding-bottom: var(--space-lg);
    border-bottom: 1px solid var(--color-sand);
}

.word-detail-sentence {
    font-family: var(--font-japanese);
    font-size: 1.125rem;
    color: var(--color-text);
    text-align: left;
    margin-bottom: var(--space-sm);
}

.word-detail-sentence-meaning {
    font-size: 0.9375rem;
    color: var(--color-text-secondary);
    text-align: left;
}

/* Streak Badge */
.streak-badge {
    display: inline-flex;
    align-items: center;
    gap: var(--space-sm);
    padding: var(--space-sm) var(--space-md);
    background: linear-gradient(135deg, var(--color-ochre), var(--color-terracotta));
    color: white;
    border-radius: var(--radius-lg);
    font-weight: 500;
    font-size: 0.875rem;
}

/* Study Mode Cards on Dashboard */
.study-modes-section {
    display: flex;
    flex-direction: column;
    gap: var(--space-md);
}

.study-mode-card {
    display: flex;
    align-items: center;
    gap: var(--space-lg);
    padding: var(--space-lg) var(--space-xl);
    background: var(--color-bg-card);
    border: 2px solid var(--color-sand);
    border-radius: var(--radius-lg);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.study-mode-card:hover {
    border-color: var(--color-terracotta);
    box-shadow: var(--shadow-md);
}

.study-mode-icon {
    font-size: 2rem;
    flex-shrink: 0;
}

.study-mode-info {
    flex: 1;
}

.study-mode-info h3 {
    margin-bottom: var(--space-xs);
}

.study-mode-info p {
    font-size: 0.875rem;
    color: var(--color-text-muted);
}

.study-mode-count {
    flex-shrink: 0;
}

.count-badge {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 36px;
    height: 36px;
    padding: 0 var(--space-sm);
    background: var(--color-terracotta);
    color: white;
    border-radius: 18px;
    font-weight: 600;
    font-size: 0.9375rem;
}

.count-done {
    color: var(--color-success);
    font-weight: 500;
    font-size: 0.875rem;
}

/* Study Mode Header */
.study-mode-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    width: 100%;
    max-width: 600px;
    margin-bottom: var(--space-md);
}

.study-mode-badge {
    display: inline-block;
    padding: var(--space-xs) var(--space-md);
    background: var(--color-sage);
    color: white;
    border-radius: var(--radius-sm);
    font-size: 0.8125rem;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

/* Study Card Large (for Study Mode) - CONSISTENT WIDTH FOR ALL CARDS */
.study-card-large {
    max-width: 650px;
    min-width: 320px;
    width: 100%;
    text-align: left;
}

.study-word-section {
    text-align: center;
    padding-bottom: var(--space-lg);
    margin-bottom: var(--space-lg);
    border-bottom: 1px solid var(--color-sand);
    position: relative;
}

.study-word-main {
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
}

/* Kanji text is centered independently */
.study-word-main .kanji-display {
    text-align: center;
}

/* Audio button positioned to the right */
.study-word-main .btn-audio {
    position: absolute;
    right: 16px;
    top: 50%;
    transform: translateY(-50%);
}

.meaning-display {
    font-size: 1.375rem;
    color: var(--color-text);
    margin-top: var(--space-md);
}

/* Audio Button - FIXED dimensions to prevent layout shift */
.btn-audio {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 44px;
    height: 44px;
    min-width: 44px;
    min-height: 44px;
    max-width: 44px;
    max-height: 44px;
    border: none;
    background: var(--color-bg-warm);
    border-radius: 50%;
    font-size: 1.25rem;
    cursor: pointer;
    transition: background-color var(--transition-fast);
    flex-shrink: 0;
    box-sizing: border-box;
}

.btn-audio:hover {
    background: var(--color-sand);
    /* NO transform - prevents layout shift */
}

.btn-audio-small {
    width: 32px;
    height: 32px;
    font-size: 1rem;
    padding: 0;
}

.sentence-with-audio {
    display: flex;
    align-items: center;
    gap: var(--space-md);
    justify-content: space-between;
}

/* Kanji Breakdown Section */
.kanji-breakdown-section {
    margin-bottom: var(--space-lg);
    padding: var(--space-lg);
    background: var(--color-bg-warm);
    border-radius: var(--radius-md);
}

.section-label {
    font-size: 0.8125rem;
    color: var(--color-text-muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: var(--space-md);
}

.kanji-components {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-md);
    margin-bottom: var(--space-md);
}

.kanji-component {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: var(--space-md);
    background: var(--color-bg-card);
    border-radius: var(--radius-sm);
    min-width: 80px;
}

.kanji-char {
    font-family: var(--font-japanese);
    font-size: 2rem;
    margin-bottom: var(--space-xs);
}

.kanji-placeholder {
    font-size: 0.75rem;
    color: var(--color-text-muted);
    text-align: center;
}

.kanji-notes-field {
    margin-top: var(--space-sm);
}

/* Example Section */
.example-section {
    margin-bottom: var(--space-lg);
    padding: var(--space-lg);
    background: var(--color-bg-warm);
    border-radius: var(--radius-md);
}

/* Remove any hr in example section */
.example-section hr {
    display: none;
}

/* Larger sentence text */
.example-section .study-sentence {
    font-size: 1.5rem;
    line-height: 1.8;
}

.example-section .study-sentence-meaning {
    font-size: 1.125rem;
    margin-top: var(--space-md);
}

/* Notes Section */
.notes-section {
    margin-bottom: var(--space-lg);
    padding: var(--space-md);
    background: var(--color-bg-warm);
    border-radius: var(--radius-sm);
}

.deck-notes {
    font-size: 0.9375rem;
    color: var(--color-text-secondary);
}

/* Larger Mnemonic Input */
.mnemonic-input-large {
    min-height: 120px;
}

/* Study Actions Bottom */
.study-actions-bottom {
    display: flex;
    gap: var(--space-md);
    justify-content: space-between;
    margin-top: var(--space-xl);
    padding-top: var(--space-lg);
    border-top: 1px solid var(--color-sand);
}

/* Load More Button */
.load-more-section {
    text-align: center;
    padding: var(--space-lg);
}

/* Word Item Audio */
.word-item-audio {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 32px;
    height: 32px;
    border: none;
    background: transparent;
    border-radius: 50%;
    font-size: 1rem;
    cursor: pointer;
    transition: all var(--transition-fast);
    flex-shrink: 0;
}

.word-item-audio:hover {
    background: var(--color-sand);
}

/* Session Header */
.session-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    width: 100%;
    padding: var(--space-md) var(--space-lg);
    margin-bottom: var(--space-lg);
}

.session-mode-label {
    display: flex;
    align-items: center;
}

.mode-badge {
    display: inline-block;
    padding: 6px 16px;
    border-radius: var(--radius-full);
    font-size: 0.8125rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.mode-badge.study {
    background: #DBEAFE;
    color: #1E40AF;
}

.mode-badge.quiz {
    background: #FFEDD5;
    color: #9A3412;
}

.btn-exit {
    position: absolute;
    right: var(--space-lg);
    top: var(--space-lg);
}

/* Navigation Tab Actions - Study/Quiz buttons (no active state) */
.nav-tab-action {
    background: transparent;
    color: var(--color-text-secondary);
    border: 1px solid var(--color-sand-dark);
}

.nav-tab-action:hover {
    background: var(--color-sand);
    color: var(--color-text);
    border-color: var(--color-clay);
}

/* Override active state for action tabs - they launch modes, not switch tabs */
.nav-tab-action.active {
    background: transparent;
    color: var(--color-text-secondary);
    box-shadow: none;
    border: 1px solid var(--color-sand-dark);
}

/* Main Action Buttons */
.main-action-buttons {
    display: flex;
    gap: var(--space-lg);
    margin-bottom: var(--space-xl);
}

.main-action-btn {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: var(--space-xl);
    border: none;
    border-radius: var(--radius-lg);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.main-action-btn.study {
    background: linear-gradient(135deg, var(--color-sage-light), var(--color-sage));
    color: white;
}

.main-action-btn.study:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.main-action-btn.quiz {
    background: linear-gradient(135deg, #FBBF24, #F59E0B);
    color: white;
}

.main-action-btn.quiz:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.main-action-icon {
    font-size: 2.5rem;
    margin-bottom: var(--space-sm);
}

.main-action-label {
    font-size: 1.25rem;
    font-weight: 600;
}

.main-action-count {
    font-size: 0.875rem;
    opacity: 0.9;
    margin-top: var(--space-xs);
}

/* Clickable Stats */
.stat-card-clickable {
    cursor: pointer;
    transition: all var(--transition-fast);
}

.stat-card-clickable:hover {
    background: var(--color-sand);
    transform: translateY(-2px);
}

/* Word of the Day */
.word-of-day-card {
    background: linear-gradient(135deg, var(--color-bg-warm), var(--color-sand));
}

.word-of-day {
    text-align: center;
    padding: var(--space-md) 0;
}

.wod-main {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-md);
}

.wod-kanji {
    font-size: 3rem;
    font-weight: 400;
}

.wod-reading {
    font-size: 1.25rem;
    color: var(--color-text-secondary);
    margin-top: var(--space-xs);
}

.wod-meaning {
    font-size: 1.125rem;
    color: var(--color-text);
    margin-top: var(--space-sm);
}

/* Did You Know - clean card without left border */
.did-you-know-card {
    background: var(--color-bg-card);
}

.did-you-know {
    padding: var(--space-sm) 0;
}

.dyk-title {
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--color-text);
    margin-bottom: var(--space-sm);
}

.dyk-content {
    font-size: 0.9375rem;
    color: var(--color-text-secondary);
    line-height: 1.6;
}

/* Study Card Wrapper with Arrows */
.study-card-wrapper {
    display: flex;
    align-items: center;
    gap: var(--space-lg);
    width: 100%;
    max-width: 800px;
}

/* Navigation Arrows */
.nav-arrow {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 48px;
    height: 48px;
    border: 2px solid var(--color-sand);
    background: var(--color-bg-card);
    border-radius: 50%;
    font-size: 1.25rem;
    color: var(--color-text);
    cursor: pointer;
    transition: all var(--transition-fast);
    flex-shrink: 0;
}

.nav-arrow:hover:not(:disabled) {
    border-color: var(--color-terracotta);
    background: var(--color-bg-warm);
}

.nav-arrow:disabled {
    opacity: 0.3;
    cursor: not-allowed;
}

/* Kanji Detail Cards - Enhanced with expandable sections */
.kanji-details-grid {
    display: flex;
    flex-direction: column;
    gap: var(--space-md);
}

.kanji-detail-card {
    display: flex;
    flex-direction: column;
    background: var(--color-bg-card);
    border-radius: var(--radius-md);
    border: 1px solid var(--color-sand);
    overflow: hidden;
    transition: box-shadow var(--transition-normal);
}

.kanji-detail-card:hover {
    box-shadow: var(--shadow-sm);
}

.kanji-detail-card.expanded {
    box-shadow: var(--shadow-md);
}

.kanji-detail-header {
    display: flex;
    align-items: center;
    gap: var(--space-lg);
    padding: var(--space-md);
    cursor: pointer;
    transition: background var(--transition-fast);
}

.kanji-detail-header:hover {
    background: var(--color-bg-warm);
}

.kanji-detail-char {
    font-family: var(--font-japanese);
    font-size: 2.5rem;
    line-height: 1;
    flex-shrink: 0;
    color: var(--color-primary);
}

.kanji-detail-info {
    flex: 1;
    font-size: 0.875rem;
}

.expand-icon {
    font-size: 1.25rem;
    color: var(--color-text-muted);
    width: 24px;
    text-align: center;
}

.kanji-meanings {
    font-weight: 600;
    color: var(--color-text);
    margin-bottom: var(--space-xs);
}

.kanji-readings {
    color: var(--color-text-secondary);
    font-size: 0.8125rem;
    display: flex;
    gap: var(--space-md);
    flex-wrap: wrap;
}

.reading-kun, .reading-on {
    display: inline-block;
}

/* Expanded content */
.kanji-detail-expanded {
    padding: var(--space-md) var(--space-lg) var(--space-lg);
    border-top: 1px solid var(--color-sand);
    background: var(--color-bg-warm);
}

.subsection-label {
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    color: var(--color-text-muted);
    margin-bottom: var(--space-sm);
}

/* Component breakdown with clickable radicals */
.kanji-components-section {
    margin-bottom: var(--space-lg);
}

.kanji-component-breakdown {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: var(--space-sm);
}

.component-plus {
    font-size: 1.25rem;
    color: var(--color-text-muted);
}

.component-btn {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: var(--space-sm) var(--space-md);
    background: var(--color-bg-card);
    border: 2px solid var(--color-primary);
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.component-btn:hover {
    background: var(--color-primary);
    transform: translateY(-2px);
}

.component-btn:hover .component-char,
.component-btn:hover .component-meaning {
    color: white;
}

.component-char {
    font-size: 1.5rem;
    font-weight: 500;
    color: var(--color-primary);
}

.component-meaning {
    font-size: 0.6875rem;
    color: var(--color-text-secondary);
    text-transform: lowercase;
}

/* Mnemonic section */
.kanji-mnemonic-section {
    margin-bottom: var(--space-lg);
}

.kanji-mnemonic-text {
    font-size: 0.9375rem;
    font-style: italic;
    color: var(--color-text-secondary);
    line-height: 1.5;
    padding: var(--space-sm) var(--space-md);
    background: var(--color-bg-card);
    border-radius: var(--radius-sm);
    border-left: 3px solid var(--color-primary);
}

/* Strokes section */
.kanji-strokes-section {
    margin-bottom: var(--space-lg);
}

.stroke-order-link {
    font-size: 0.8125rem;
    color: var(--color-primary);
    text-decoration: none;
}

.stroke-order-link:hover {
    text-decoration: underline;
}

/* Related vocabulary */
.kanji-related-section {
    margin-bottom: 0;
}

.related-vocab-list {
    display: flex;
    flex-direction: column;
    gap: var(--space-xs);
}

.related-vocab-item {
    display: flex;
    align-items: baseline;
    gap: var(--space-sm);
    font-size: 0.875rem;
    padding: var(--space-xs) var(--space-sm);
    background: var(--color-bg-card);
    border-radius: var(--radius-sm);
}

.related-word {
    font-weight: 600;
    color: var(--color-text);
}

.related-reading {
    color: var(--color-text-muted);
    font-size: 0.8125rem;
}

.related-meaning {
    color: var(--color-text-secondary);
    margin-left: auto;
}

/* Radical popup modal */
.radical-popup-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.5);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    padding: var(--space-lg);
}

.radical-popup {
    background: var(--color-bg-card);
    border-radius: var(--radius-lg);
    padding: var(--space-xl);
    max-width: 320px;
    width: 100%;
    text-align: center;
    position: relative;
    box-shadow: var(--shadow-lg);
}

.radical-popup-close {
    position: absolute;
    top: var(--space-sm);
    right: var(--space-sm);
    background: none;
    border: none;
    font-size: 1.5rem;
    color: var(--color-text-muted);
    cursor: pointer;
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-full);
}

.radical-popup-close:hover {
    background: var(--color-sand);
    color: var(--color-text);
}

.radical-popup-char {
    font-size: 4rem;
    color: var(--color-primary);
    margin-bottom: var(--space-md);
}

.radical-popup-meaning {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--color-text);
    margin-bottom: var(--space-md);
}

.radical-popup-mnemonic {
    font-size: 0.9375rem;
    color: var(--color-text-secondary);
    line-height: 1.5;
    font-style: italic;
    margin-bottom: var(--space-md);
}

.radical-popup-category {
    font-size: 0.8125rem;
    color: var(--color-text-muted);
    text-transform: capitalize;
}

/* Legacy styles for backwards compatibility */
.kanji-radical {
    font-size: 0.8125rem;
    color: var(--color-text-muted);
    margin-top: var(--space-xs);
}

.kanji-components-list {
    font-size: 0.8125rem;
    color: var(--color-text-muted);
}

.kanji-mnemonic {
    margin-top: var(--space-sm);
    padding-top: var(--space-sm);
    border-top: 1px solid var(--color-sand);
    font-size: 0.875rem;
    color: var(--color-text-secondary);
    font-style: italic;
}

/* Quiz Mode Styles */
.quiz-card {
    width: 100%;
    max-width: 500px;
}

.quiz-question {
    text-align: center;
    padding-bottom: var(--space-lg);
    margin-bottom: var(--space-lg);
    border-bottom: 1px solid var(--color-sand);
}

.quiz-prompt {
    font-size: 0.875rem;
    color: var(--color-text-muted);
    margin-bottom: var(--space-md);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.quiz-meaning {
    font-size: 1.5rem;
    font-weight: 500;
    color: var(--color-text);
}

/* Quiz Options */
.quiz-options {
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
}

.quiz-option {
    display: flex;
    align-items: center;
    gap: var(--space-md);
    padding: 14px 20px;
    background: var(--color-bg-warm);
    border: 2px solid transparent;
    border-radius: 16px;
    cursor: pointer;
    transition: all var(--transition-normal);
    text-align: left;
    font-family: var(--font-sans);
    font-size: 1rem;
}

.quiz-option:hover:not(:disabled) {
    background: var(--color-sand);
    border-color: var(--color-sand-dark);
}

.quiz-option.selected {
    border-color: var(--color-terracotta);
}

.quiz-option.correct {
    background: var(--color-success-light);
    border-color: var(--color-success);
}

.quiz-option.incorrect {
    background: var(--color-error-light);
    border-color: var(--color-error);
}

.quiz-option:disabled {
    cursor: default;
}

.option-letter {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 28px;
    height: 28px;
    background: var(--color-bg-card);
    border-radius: 50%;
    font-weight: 600;
    font-size: 0.875rem;
    color: var(--color-text-muted);
    flex-shrink: 0;
}

.quiz-option.correct .option-letter {
    background: var(--color-success);
    color: white;
}

.quiz-option.incorrect .option-letter {
    background: var(--color-error);
    color: white;
}

.option-text {
    flex: 1;
    display: flex;
    align-items: baseline;
    gap: var(--space-sm);
}

.option-word {
    font-size: 1.125rem;
}

.option-reading {
    color: var(--color-text-muted);
    font-size: 0.875rem;
    margin-left: var(--space-sm);
}

.option-audio-btn {
    flex-shrink: 0;
    width: 32px;
    height: 32px;
    border: none;
    background: var(--color-bg-card);
    border-radius: 50%;
    font-size: 0.875rem;
    cursor: pointer;
    transition: all var(--transition-fast);
    display: flex;
    align-items: center;
    justify-content: center;
}

.option-audio-btn:hover {
    background: var(--color-sand);
}

.quiz-option.correct .option-audio-btn,
.quiz-option.incorrect .option-audio-btn {
    background: rgba(255, 255, 255, 0.3);
}

/* Quiz Feedback */
.quiz-feedback {
    margin-top: var(--space-lg);
    padding: var(--space-md) var(--space-lg);
    border-radius: 16px;
    text-align: center;
}

.quiz-feedback.correct {
    background: var(--color-success-light);
    color: var(--color-success);
    font-weight: 600;
}

.quiz-feedback.incorrect {
    background: var(--color-error-light);
    color: var(--color-error);
}

.correct-answer-display {
    margin-top: var(--space-sm);
    color: var(--color-text);
    font-weight: normal;
}

.mnemonic-reminder {
    margin-top: var(--space-md);
    padding: var(--space-md);
    background: var(--color-bg-warm);
    border-radius: var(--radius-sm);
    text-align: left;
}

.quiz-actions {
    margin-top: var(--space-lg);
    text-align: center;
}

/* Button Small */
.btn-small {
    padding: var(--space-xs) var(--space-md);
    font-size: 0.8125rem;
}

/* Responsive */
@media (max-width: 600px) {
    .app-container {
        padding: var(--space-md);
    }

    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .study-card {
        padding: var(--space-lg);
    }

    .kanji-display {
        font-size: 2.5rem;
    }

    .stack-tabs {
        flex-direction: column;
    }

    .study-mode-card {
        flex-direction: column;
        text-align: center;
    }

    .study-actions-bottom {
        flex-direction: column;
    }

    .main-action-buttons {
        flex-direction: column;
    }

    .nav-arrow {
        display: none;
    }

    .study-card-wrapper {
        flex-direction: column;
    }

    .nav-tabs {
        flex-wrap: wrap;
        justify-content: center;
    }
}

/* ===========================================
   Kana Tables
   =========================================== */

.kana-tables {
    max-width: 900px;
    margin: 0 auto;
    padding: var(--space-lg);
}

.kana-tabs {
    display: flex;
    gap: var(--space-md);
    margin-bottom: var(--space-lg);
}

.kana-tab {
    flex: 1;
    padding: var(--space-md) var(--space-lg);
    background: var(--color-bg-warm);
    border: 2px solid transparent;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition-fast);
    text-align: center;
    display: flex;
    flex-direction: column;
    gap: var(--space-xs);
}

.kana-tab:hover {
    background: var(--color-sand);
}

.kana-tab.active {
    border-color: var(--color-terracotta);
    background: var(--color-bg-card);
}

.kana-tab .japanese {
    font-family: var(--font-japanese);
    font-size: 1.25rem;
}

.kana-toggle {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--space-lg);
    padding: var(--space-sm) var(--space-md);
    background: var(--color-bg-warm);
    border-radius: var(--radius-sm);
}

.toggle-label {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    cursor: pointer;
    font-size: 0.9375rem;
}

.toggle-label input {
    width: 18px;
    height: 18px;
    accent-color: var(--color-terracotta);
}

.kana-hint {
    font-size: 0.8125rem;
    color: var(--color-text-muted);
}

.kana-section {
    margin-bottom: var(--space-xl);
}

.kana-section-title {
    font-size: 1rem;
    font-weight: 500;
    color: var(--color-text-secondary);
    margin-bottom: var(--space-md);
    padding-bottom: var(--space-sm);
    border-bottom: 1px solid var(--color-sand);
}

.kana-grid {
    display: grid;
    gap: var(--space-sm);
}

.kana-cell {
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--color-bg-card);
    border: 1px solid var(--color-sand);
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition-fast);
    height: 56px;
    min-width: 56px;
}

.kana-cell:hover:not(.empty) {
    background: var(--color-primary);
    border-color: var(--color-primary);
    transform: scale(1.05);
}

.kana-cell:hover:not(.empty) .kana-char,
.kana-cell:hover:not(.empty) .kana-romaji {
    color: white;
}

.kana-cell.empty {
    background: transparent;
    border-color: transparent;
    cursor: default;
}

.kana-char {
    font-family: var(--font-japanese);
    font-size: 1.5rem;
    font-weight: 400;
    line-height: 1;
}

.kana-romaji {
    position: absolute;
    top: 4px;
    right: 6px;
    font-size: 0.625rem;
    color: var(--color-text-muted);
    transition: color var(--transition-fast);
}

.kana-tips {
    margin-top: var(--space-xl);
    padding: var(--space-lg);
    background: var(--color-bg-warm);
    border-radius: var(--radius-md);
}

.kana-tips h3 {
    font-size: 1rem;
    margin-bottom: var(--space-md);
    color: var(--color-text);
}

.kana-tips ul {
    list-style: none;
    padding: 0;
}

.kana-tips li {
    padding: var(--space-sm) 0;
    font-size: 0.9375rem;
    color: var(--color-text-secondary);
    border-bottom: 1px solid var(--color-sand);
}

.kana-tips li:last-child {
    border-bottom: none;
}

.kana-tips strong {
    color: var(--color-text);
}

/* Kana table responsive */
@media (max-width: 600px) {
    .kana-tabs {
        flex-direction: column;
    }

    .kana-cell {
        min-height: 50px;
    }

    .kana-char {
        font-size: 1.25rem;
    }

    .kana-toggle {
        flex-direction: column;
        gap: var(--space-sm);
        align-items: flex-start;
    }
}

/* ===========================================
   Grammar Section
   =========================================== */

.grammar-section {
    max-width: 900px;
    margin: 0 auto;
    padding: var(--space-lg);
}

/* Grammar Progress Header */
.grammar-progress-header {
    background: var(--color-bg-card);
    padding: var(--space-lg);
    border-radius: 16px;
    margin-bottom: var(--space-lg);
}

.grammar-progress-info {
    display: flex;
    justify-content: space-between;
    margin-bottom: var(--space-sm);
}

.progress-label {
    font-weight: 500;
    color: var(--color-text);
}

.progress-count {
    font-size: 0.875rem;
    color: var(--color-text-muted);
}

.grammar-progress-bar {
    height: 8px;
    background: var(--color-sand);
    border-radius: 4px;
    overflow: hidden;
}

.grammar-progress-fill {
    height: 100%;
    background: var(--color-primary);
    border-radius: 4px;
    transition: width var(--transition-normal);
}

/* Tab Progress Badge */
.tab-progress {
    font-size: 0.75rem;
    color: var(--color-text-muted);
    background: var(--color-sand);
    padding: 2px 6px;
    border-radius: var(--radius-full);
    margin-top: 2px;
}

.grammar-tab.active .tab-progress {
    background: var(--color-primary-light);
    color: var(--color-primary);
}

/* Grammar Content Header */
.grammar-content-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: var(--space-md);
    margin-bottom: var(--space-lg);
    padding-bottom: var(--space-md);
    border-bottom: 2px solid var(--color-sand);
}

.grammar-content-header .grammar-title {
    margin-bottom: 0;
    padding-bottom: 0;
    border-bottom: none;
}

/* Show Learned Toggle */
.show-learned-toggle {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    font-size: 0.875rem;
    color: var(--color-text-secondary);
    cursor: pointer;
}

.show-learned-toggle input {
    width: 16px;
    height: 16px;
    cursor: pointer;
}

/* Category Progress */
.category-progress {
    font-size: 0.875rem;
    color: var(--color-text-muted);
    margin-bottom: var(--space-lg);
}

/* Learned State Styling */
.is-learned {
    opacity: 0.6;
    order: 999;
}

.is-learned:hover {
    opacity: 0.8;
}

/* Learned Indicator */
.learned-indicator {
    margin-left: auto;
    background: var(--color-success-light);
    color: var(--color-success);
    padding: 2px 8px;
    border-radius: var(--radius-full);
    font-size: 0.75rem;
    font-weight: 600;
}

.learned-badge-corner {
    position: absolute;
    top: var(--space-sm);
    right: var(--space-sm);
    background: var(--color-success);
    color: white;
    width: 24px;
    height: 24px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.75rem;
}

/* Card Footer */
.card-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-top: var(--space-md);
    padding-top: var(--space-md);
    border-top: 1px solid var(--color-sand);
}

/* Learn Buttons */
.btn-learn-small {
    padding: 6px 12px;
    font-size: 0.8125rem;
    border: none;
    background: var(--color-primary);
    color: white;
    border-radius: var(--radius-full);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.btn-learn-small:hover {
    background: var(--color-primary-light);
}

.btn-learn-small.btn-unlearn {
    background: var(--color-sand);
    color: var(--color-text-muted);
}

.btn-learn-small.btn-unlearn:hover {
    background: var(--color-sand-dark);
    color: var(--color-text);
}

.btn-learn-table {
    padding: 4px 10px;
    font-size: 0.75rem;
    border: none;
    background: var(--color-primary);
    color: white;
    border-radius: var(--radius-full);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.btn-learn-table:hover {
    background: var(--color-primary-light);
}

.btn-learn-table.btn-unlearn {
    background: var(--color-success-light);
    color: var(--color-success);
}

.btn-learn-table.btn-unlearn:hover {
    background: var(--color-sand);
    color: var(--color-text);
}

/* Audio Buttons */
.btn-audio {
    padding: 4px 8px;
    border: none;
    background: transparent;
    font-size: 1rem;
    cursor: pointer;
    opacity: 0.6;
    transition: all var(--transition-fast);
}

.btn-audio:hover {
    opacity: 1;
    /* Removed transform to prevent layout shift */
}

.btn-audio-inline {
    padding: 2px 4px;
    border: none;
    background: transparent;
    font-size: 0.875rem;
    cursor: pointer;
    opacity: 0.5;
    margin-left: var(--space-xs);
}

.btn-audio-inline:hover {
    opacity: 1;
}

.btn-audio-large {
    padding: 10px 16px;
    border: none;
    background: var(--color-bg-warm);
    border-radius: var(--radius-full);
    font-size: 1.25rem;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.btn-audio-large:hover {
    background: var(--color-sand);
    /* Removed transform to prevent layout shift */
}

/* Pattern Card Updates */
.pattern-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-top: var(--space-md);
}

.pattern-example {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    flex-wrap: wrap;
}

.pattern-example-en {
    font-size: 0.875rem;
    color: var(--color-text-muted);
    font-style: italic;
}

/* Adjective Header */
.adjective-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--space-md);
}

/* Counter Card Updates */
.counter-card {
    position: relative;
}

.counter-header {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
}

/* Modal Grammar Styles */
.modal-grammar-detail {
    max-width: 500px;
    padding: var(--space-2xl);
}

.modal-header-grammar {
    display: flex;
    align-items: center;
    gap: var(--space-lg);
    margin-bottom: var(--space-xl);
}

.modal-particle {
    font-size: 4rem;
    color: var(--color-primary);
}

.modal-counter {
    font-size: 4rem;
    color: var(--color-primary);
}

.modal-particle-info {
    display: flex;
    flex-direction: column;
    gap: var(--space-xs);
}

.modal-reading {
    font-size: 1rem;
    color: var(--color-text-muted);
}

.modal-name {
    font-size: 1.25rem;
    font-weight: 600;
}

.modal-explanation {
    font-size: 1rem;
    line-height: 1.6;
    color: var(--color-text-secondary);
    margin-bottom: var(--space-xl);
    padding: var(--space-md);
    background: var(--color-bg-warm);
    border-radius: 12px;
}

.modal-section {
    margin-bottom: var(--space-xl);
}

.modal-section h4 {
    font-size: 0.9375rem;
    color: var(--color-text-muted);
    margin-bottom: var(--space-md);
    padding-bottom: var(--space-sm);
    border-bottom: 1px solid var(--color-sand);
}

.modal-examples {
    display: flex;
    flex-direction: column;
    gap: var(--space-md);
}

.modal-example-row {
    padding: var(--space-md);
    background: var(--color-bg-warm);
    border-radius: 12px;
}

.example-jp-row {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    margin-bottom: var(--space-xs);
}

.example-reading {
    font-size: 0.875rem;
    color: var(--color-text-muted);
    margin-bottom: var(--space-xs);
}

.counter-full-list {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-sm);
}

.counter-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--space-sm) var(--space-md);
    background: var(--color-bg-warm);
    border-radius: 8px;
    font-size: 0.9375rem;
}

.modal-notes {
    padding: var(--space-md);
    background: var(--color-sand);
    border-radius: 12px;
    font-size: 0.9375rem;
    color: var(--color-text-secondary);
    margin-bottom: var(--space-xl);
}

.modal-usage {
    font-size: 1.125rem;
    color: var(--color-text-secondary);
    margin-bottom: var(--space-xl);
}

.modal-actions-grammar {
    display: flex;
    gap: var(--space-md);
    justify-content: center;
    padding-top: var(--space-lg);
    border-top: 1px solid var(--color-sand);
}

/* Conjugation table learned state */
.conjugation-table tr.is-learned {
    opacity: 0.6;
}

.conjugation-table tr.is-learned:hover {
    opacity: 0.8;
}

.grammar-tabs {
    display: flex;
    gap: var(--space-sm);
    margin-bottom: var(--space-xl);
    overflow-x: auto;
    padding-bottom: var(--space-sm);
}

.grammar-tab {
    padding: 10px 16px;
    background: var(--color-bg-warm);
    border: 2px solid transparent;
    border-radius: var(--radius-full);
    cursor: pointer;
    transition: all var(--transition-normal);
    text-align: center;
    display: flex;
    flex-direction: column;
    gap: 2px;
    white-space: nowrap;
    min-width: fit-content;
}

.grammar-tab:hover {
    background: var(--color-sand);
}

.grammar-tab.active {
    border-color: var(--color-primary);
    background: var(--color-bg-card);
}

.grammar-tab .japanese {
    font-family: var(--font-japanese);
    font-size: 1rem;
}

.grammar-content {
    background: var(--color-bg-card);
    border-radius: var(--radius-lg);
    padding: var(--space-xl);
    box-shadow: var(--shadow-sm);
}

.grammar-title {
    display: flex;
    align-items: center;
    gap: var(--space-md);
    margin-bottom: var(--space-lg);
    padding-bottom: var(--space-md);
    border-bottom: 2px solid var(--color-sand);
}

.grammar-title .japanese {
    font-family: var(--font-japanese);
    font-size: 1.5rem;
    color: var(--color-terracotta);
}

.grammar-description {
    color: var(--color-text-secondary);
    margin-bottom: var(--space-lg);
    font-size: 0.9375rem;
}

/* Particles */
.particles-list {
    display: flex;
    flex-direction: column;
    gap: var(--space-lg);
}

.particle-card {
    padding: var(--space-lg);
    background: var(--color-bg-warm);
    border-radius: 16px;
    border-left: 4px solid var(--color-primary);
}

.particle-header {
    display: flex;
    align-items: center;
    gap: var(--space-md);
    margin-bottom: var(--space-sm);
}

.particle-char {
    font-family: var(--font-japanese);
    font-size: 2rem;
    font-weight: 500;
    color: var(--color-terracotta);
}

.particle-reading {
    font-size: 0.875rem;
    color: var(--color-text-muted);
}

.particle-name {
    font-weight: 600;
    color: var(--color-text);
}

.particle-explanation {
    font-size: 0.9375rem;
    color: var(--color-text-secondary);
    margin-bottom: var(--space-md);
}

.particle-examples {
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
}

.example-row {
    display: flex;
    flex-direction: column;
    padding: var(--space-sm);
    background: var(--color-bg-card);
    border-radius: var(--radius-sm);
}

.example-jp {
    font-family: var(--font-japanese);
    font-size: 1rem;
    color: var(--color-text);
}

.example-en {
    font-size: 0.875rem;
    color: var(--color-text-muted);
}

/* Counters */
.counters-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: var(--space-md);
}

.counter-card {
    padding: var(--space-lg);
    background: var(--color-bg-warm);
    border-radius: 16px;
    text-align: center;
}

.counter-char {
    font-family: var(--font-japanese);
    font-size: 2rem;
    color: var(--color-terracotta);
    margin-bottom: var(--space-xs);
}

.counter-reading {
    font-size: 0.875rem;
    color: var(--color-text-muted);
    margin-bottom: var(--space-sm);
}

.counter-usage {
    font-weight: 500;
    color: var(--color-text);
    margin-bottom: var(--space-sm);
}

.counter-examples {
    font-size: 0.8125rem;
    color: var(--color-text-secondary);
}

/* Clickable Cards - Interactive elements */
.clickable-card {
    cursor: pointer;
    transition: all var(--transition-normal);
    border: 2px solid transparent;
}

.clickable-card:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-md);
    border-color: var(--color-primary);
    background: var(--color-bg-card);
}

.click-hint {
    font-size: 0.75rem;
    color: var(--color-text-muted);
    margin-top: var(--space-sm);
    opacity: 0;
    transition: opacity var(--transition-normal);
}

.clickable-card:hover .click-hint {
    color: var(--color-primary);
    opacity: 1;
}

/* Grammar Modal */
.modal-large {
    max-width: 500px;
    width: 90%;
}

.modal-header-grammar {
    display: flex;
    align-items: center;
    gap: var(--space-md);
    margin-bottom: var(--space-lg);
    flex-wrap: wrap;
}

.modal-particle,
.modal-counter {
    font-family: var(--font-japanese);
    font-size: 3rem;
    color: var(--color-terracotta);
}

.modal-reading {
    font-size: 1.125rem;
    color: var(--color-text-muted);
}

.modal-name {
    font-size: 1.25rem;
    font-weight: 500;
    color: var(--color-text);
}

.modal-explanation,
.modal-usage {
    font-size: 1rem;
    color: var(--color-text-secondary);
    margin-bottom: var(--space-lg);
    line-height: 1.6;
}

.modal-section {
    margin-bottom: var(--space-lg);
}

.modal-section h4 {
    font-size: 0.875rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--color-text-muted);
    margin-bottom: var(--space-md);
}

.modal-examples {
    display: flex;
    flex-direction: column;
    gap: var(--space-md);
}

.modal-example-row {
    padding: var(--space-md);
    background: var(--color-bg-warm);
    border-radius: var(--radius-sm);
}

.modal-example-row .example-jp {
    font-family: var(--font-japanese);
    font-size: 1.125rem;
    color: var(--color-text);
    margin-bottom: var(--space-xs);
}

.modal-example-row .example-en {
    font-size: 0.875rem;
    color: var(--color-text-secondary);
}

.counter-full-list {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
    gap: var(--space-sm);
}

.counter-item {
    padding: var(--space-sm) var(--space-md);
    background: var(--color-bg-warm);
    border-radius: var(--radius-sm);
    font-family: var(--font-japanese);
    font-size: 0.9375rem;
    text-align: center;
}

.modal-notes {
    padding: var(--space-md);
    background: var(--color-success-light);
    border-radius: var(--radius-sm);
    font-size: 0.875rem;
    color: var(--color-text-secondary);
    margin-bottom: var(--space-lg);
}

/* Conjugation Table */
.conjugation-table-wrapper {
    overflow-x: auto;
}

.conjugation-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.9375rem;
}

.conjugation-table th,
.conjugation-table td {
    padding: var(--space-md);
    border: 1px solid var(--color-sand);
    text-align: left;
}

.conjugation-table th {
    background: var(--color-bg-warm);
    font-weight: 500;
}

.conjugation-table td.japanese {
    font-family: var(--font-japanese);
    font-size: 1rem;
}

.form-name {
    font-weight: 600;
    color: var(--color-text);
}

.form-jp {
    font-size: 0.875rem;
    color: var(--color-terracotta);
}

.form-explanation {
    font-size: 0.75rem;
    color: var(--color-text-muted);
    margin-top: 2px;
}

/* Adjectives */
.adjectives-section {
    display: flex;
    flex-direction: column;
    gap: var(--space-xl);
}

.adjective-type h3 {
    display: flex;
    align-items: center;
    gap: var(--space-md);
    margin-bottom: var(--space-md);
    color: var(--color-text);
}

.adjective-type h3 .japanese {
    font-family: var(--font-japanese);
    color: var(--color-terracotta);
}

.adjective-example {
    margin-bottom: var(--space-md);
    color: var(--color-text-secondary);
}

.adjective-table {
    width: 100%;
    border-collapse: collapse;
}

.adjective-table td {
    padding: var(--space-sm) var(--space-md);
    border: 1px solid var(--color-sand);
}

.adjective-table td:first-child {
    font-weight: 500;
    background: var(--color-bg-warm);
    width: 25%;
}

.adjective-table td.japanese {
    font-family: var(--font-japanese);
}

/* Patterns */
.patterns-list {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: var(--space-md);
}

.pattern-card {
    padding: var(--space-md);
    background: var(--color-bg-warm);
    border-radius: var(--radius-md);
}

.pattern-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--space-sm);
}

.pattern-form {
    font-family: var(--font-japanese);
    font-size: 1.25rem;
    font-weight: 500;
    color: var(--color-terracotta);
}

.pattern-meaning {
    font-size: 0.875rem;
    color: var(--color-text);
}

.pattern-example {
    padding: var(--space-sm);
    background: var(--color-bg-card);
    border-radius: var(--radius-sm);
    margin-bottom: var(--space-sm);
}

.pattern-notes {
    font-size: 0.8125rem;
    color: var(--color-text-muted);
}

/* Custom Tooltips - Fixed positioning and visibility */
.jp-tooltip {
    position: relative;
    cursor: help;
    display: inline-block;
}

.jp-tooltip::after {
    content: attr(data-tooltip);
    position: absolute;
    bottom: calc(100% + 8px);
    left: 50%;
    transform: translateX(-50%);
    padding: 6px 10px;
    background: #1A1A1A;
    color: #FFFFFF;
    font-family: var(--font-sans);
    font-size: 0.8125rem;
    font-weight: 500;
    white-space: nowrap;
    border-radius: 6px;
    opacity: 0;
    visibility: hidden;
    transition: opacity 150ms ease, visibility 150ms ease;
    z-index: 9999;
    pointer-events: none;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
}

.jp-tooltip::before {
    content: '';
    position: absolute;
    bottom: calc(100% + 2px);
    left: 50%;
    transform: translateX(-50%);
    border: 6px solid transparent;
    border-top-color: #1A1A1A;
    opacity: 0;
    visibility: hidden;
    transition: opacity 150ms ease, visibility 150ms ease;
    z-index: 9999;
    pointer-events: none;
}

.jp-tooltip:hover::after,
.jp-tooltip:hover::before {
    opacity: 1;
    visibility: visible;
}

/* Ensure parent containers don't clip tooltips */
.study-card,
.study-word-section,
.study-word-main,
.quiz-question,
.sentence-with-audio {
    overflow: visible !important;
}

/* Hoverable kana/kanji in text */
.hoverable-char {
    position: relative;
    cursor: help;
    transition: color var(--transition-fast);
}

.hoverable-char:hover {
    color: var(--color-terracotta);
}

/* Grammar responsive */
@media (max-width: 768px) {
    .grammar-tabs {
        flex-wrap: wrap;
    }

    .counters-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .patterns-list {
        grid-template-columns: 1fr;
    }

    .conjugation-table {
        font-size: 0.8125rem;
    }

    .conjugation-table th,
    .conjugation-table td {
        padding: var(--space-sm);
    }
}

/* ===========================================
   Kanji Learning System
   =========================================== */

.kanji-section {
    max-width: 900px;
    margin: 0 auto;
    padding: var(--space-lg);
}

/* Kanji Tabs */
.kanji-tabs {
    display: flex;
    gap: var(--space-sm);
    margin-bottom: var(--space-xl);
    background: var(--color-bg-warm);
    padding: 6px;
    border-radius: var(--radius-full);
}

.kanji-tab {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-sm);
    padding: 12px 16px;
    border: none;
    background: transparent;
    border-radius: var(--radius-full);
    font-size: 0.9375rem;
    font-weight: 500;
    cursor: pointer;
    transition: all var(--transition-normal);
    color: var(--color-text-secondary);
}

.kanji-tab:hover {
    background: var(--color-sand);
    color: var(--color-text);
}

.kanji-tab.active {
    background: var(--color-bg-card);
    color: var(--color-text);
    box-shadow: var(--shadow-sm);
}

/* Introduction Page */
.kanji-intro {
    text-align: center;
}

.intro-hero {
    margin-bottom: var(--space-2xl);
}

.intro-hero h2 {
    font-size: 2rem;
    margin-bottom: var(--space-sm);
}

.intro-subtitle {
    font-size: 1.125rem;
    color: var(--color-text-secondary);
}

.intro-section {
    background: var(--color-bg-card);
    border-radius: 20px;
    padding: var(--space-xl);
    margin-bottom: var(--space-xl);
    text-align: left;
}

.intro-section h3 {
    margin-bottom: var(--space-md);
    color: var(--color-primary);
}

/* Intro Card Stack with Side Navigation */
.intro-card-wrapper {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-lg);
    max-width: 900px;
    margin: 0 auto;
    position: relative;
}

.intro-card-stack {
    max-width: 700px;
    flex: 1;
}

/* Side Navigation Arrows */
.side-nav-arrow {
    position: relative;
    width: 48px;
    height: 48px;
    border: none;
    background: var(--color-bg-card);
    border-radius: 50%;
    font-size: 2rem;
    color: var(--color-primary);
    cursor: pointer;
    box-shadow: var(--shadow-md);
    transition: all var(--transition-fast);
    flex-shrink: 0;
}

.side-nav-arrow:hover:not(:disabled) {
    background: var(--color-primary);
    color: white;
    transform: scale(1.1);
}

.side-nav-arrow:disabled {
    opacity: 0.3;
    cursor: not-allowed;
}

/* Modal Navigation Arrows */
.modal-nav-arrow {
    position: fixed;
    top: 50%;
    transform: translateY(-50%);
    width: 56px;
    height: 56px;
    border: none;
    background: var(--color-bg-card);
    border-radius: 50%;
    font-size: 2.5rem;
    color: var(--color-primary);
    cursor: pointer;
    box-shadow: var(--shadow-lg);
    transition: all var(--transition-fast);
    z-index: 1001;
}

.modal-nav-arrow:hover:not(:disabled) {
    background: var(--color-primary);
    color: white;
    transform: translateY(-50%) scale(1.1);
}

.modal-nav-arrow:disabled {
    opacity: 0.3;
    cursor: not-allowed;
}

.modal-nav-left {
    left: var(--space-lg);
}

.modal-nav-right {
    right: var(--space-lg);
}

.modal-progress-indicator {
    position: absolute;
    top: var(--space-md);
    left: 50%;
    transform: translateX(-50%);
    font-size: 0.8125rem;
    color: var(--color-text-muted);
    background: var(--color-bg-warm);
    padding: var(--space-xs) var(--space-md);
    border-radius: var(--radius-full);
}

.intro-card {
    background: var(--color-bg-card);
    border-radius: 20px;
    padding: var(--space-xl) var(--space-2xl);
    text-align: left;
    min-height: 400px;
    display: flex;
    flex-direction: column;
}

.intro-card h3 {
    text-align: center;
    font-size: 1.5rem;
    color: var(--color-primary);
    margin-bottom: var(--space-xl);
}

.intro-card-content {
    flex: 1;
}

.intro-text {
    font-size: 1.0625rem;
    line-height: 1.7;
    margin-bottom: var(--space-lg);
}

.intro-hint {
    font-size: 0.9375rem;
    color: var(--color-text-secondary);
    font-style: italic;
    margin-top: var(--space-lg);
    text-align: center;
}

/* Intro Card Navigation */
.intro-card-nav {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-top: var(--space-xl);
    padding: var(--space-md) 0;
}

.intro-nav-btn {
    padding: 10px 20px;
    border: none;
    background: var(--color-bg-warm);
    color: var(--color-text-secondary);
    font-family: var(--font-sans);
    font-size: 0.9375rem;
    font-weight: 500;
    border-radius: var(--radius-full);
    cursor: pointer;
    transition: all var(--transition-normal);
}

.intro-nav-btn:hover:not(:disabled) {
    background: var(--color-sand-dark);
    color: var(--color-text);
}

.intro-nav-btn:disabled {
    opacity: 0.4;
    cursor: not-allowed;
}

.intro-card-progress {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-sm);
}

.progress-text {
    font-size: 0.875rem;
    color: var(--color-text-muted);
}

.progress-dots {
    display: flex;
    gap: var(--space-sm);
}

.progress-dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: var(--color-sand);
    cursor: pointer;
    transition: all var(--transition-normal);
}

.progress-dot:hover {
    background: var(--color-sand-dark);
    transform: scale(1.2);
}

.progress-dot.active {
    background: var(--color-primary);
    transform: scale(1.2);
}

.progress-dot.completed {
    background: var(--color-primary-light);
}

/* Radicals Showcase (Card 2) */
.radicals-showcase {
    display: flex;
    flex-direction: column;
    gap: var(--space-md);
}

.radical-showcase-item {
    display: flex;
    align-items: center;
    gap: var(--space-lg);
    padding: var(--space-md) var(--space-lg);
    background: var(--color-bg-warm);
    border-radius: 12px;
}

.showcase-char {
    font-size: 2.5rem;
    color: var(--color-primary);
    min-width: 60px;
    text-align: center;
}

.showcase-info {
    display: flex;
    flex-direction: column;
    min-width: 100px;
}

.showcase-meaning {
    font-weight: 600;
    color: var(--color-text);
}

.showcase-name {
    font-size: 0.8125rem;
    color: var(--color-text-muted);
    font-style: italic;
}

.showcase-examples {
    margin-left: auto;
    font-size: 1.5rem;
    letter-spacing: 0.3em;
    color: var(--color-text-secondary);
}

/* Combination Examples (Card 3) - Fixed Layout */
.combination-examples {
    display: flex;
    flex-direction: column;
    gap: var(--space-md);
}

.combination-item {
    padding: var(--space-md) var(--space-lg);
    background: var(--color-bg-warm);
    border-radius: 12px;
}

.combo-formula {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-md);
    margin-bottom: var(--space-sm);
    flex-wrap: wrap;
}

.combo-part-group, .combo-result-group {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 2px;
}

.combo-part {
    font-size: 1.75rem;
    color: var(--color-text);
}

.combo-result {
    font-size: 2rem;
    color: var(--color-primary);
}

.combo-label {
    font-size: 0.6875rem;
    color: var(--color-text-muted);
    text-transform: uppercase;
}

.combo-operator {
    font-size: 1.25rem;
    color: var(--color-text-muted);
    font-weight: 300;
}

.combo-story {
    text-align: center;
    font-size: 0.875rem;
    color: var(--color-text-secondary);
}

/* Practice Grid (Card 4) - Intro version */
.practice-grid-intro {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-md);
}

.practice-item-intro {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-sm);
    padding: var(--space-md);
    background: var(--color-bg-warm);
    border-radius: 12px;
    text-align: center;
}

.practice-kanji-box {
    display: flex;
    align-items: center;
    gap: var(--space-xs);
}

.practice-kanji-box .practice-kanji {
    font-size: 2.5rem;
    color: var(--color-text);
}

.practice-breakdown {
    display: flex;
    align-items: center;
    gap: var(--space-xs);
}

.practice-breakdown .practice-radical {
    font-size: 1.25rem;
    color: var(--color-primary);
}

.practice-breakdown .practice-op {
    color: var(--color-text-muted);
    font-size: 0.875rem;
}

.practice-item-intro .practice-hint {
    font-size: 0.6875rem;
    color: var(--color-text-muted);
    font-style: italic;
}

/* Audio button variations */
.btn-audio-inline {
    background: none;
    border: none;
    font-size: 1rem;
    cursor: pointer;
    padding: 2px;
    margin-left: var(--space-xs);
    opacity: 0.7;
    transition: opacity var(--transition-fast);
}

.btn-audio-inline:hover {
    opacity: 1;
}

.btn-audio-xs {
    background: none;
    border: none;
    font-size: 0.75rem;
    cursor: pointer;
    padding: 2px;
    opacity: 0.6;
    transition: opacity var(--transition-fast);
}

.btn-audio-xs:hover {
    opacity: 1;
}

/* More words button */
.more-words-btn {
    background: none;
    border: 1px dashed var(--color-sand-dark);
    color: var(--color-primary);
    padding: var(--space-sm) var(--space-md);
    border-radius: var(--radius-sm);
    cursor: pointer;
    font-size: 0.875rem;
    width: 100%;
    transition: all var(--transition-fast);
}

.more-words-btn:hover {
    background: var(--color-bg-warm);
    border-color: var(--color-primary);
}

/* Practice Grid (Card 4) - Legacy */
.practice-grid {
    display: flex;
    flex-direction: column;
    gap: var(--space-lg);
}

.practice-item {
    display: flex;
    align-items: center;
    gap: var(--space-xl);
    padding: var(--space-lg);
    background: var(--color-bg-warm);
    border-radius: 12px;
}

.practice-kanji {
    font-size: 3rem;
    color: var(--color-text);
    min-width: 80px;
    text-align: center;
}

.practice-answer {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: var(--space-sm);
}

.practice-radical {
    font-size: 1.5rem;
    color: var(--color-primary);
}

.practice-plus {
    color: var(--color-text-muted);
}

.practice-hint {
    font-size: 0.8125rem;
    color: var(--color-text-muted);
    font-style: italic;
    margin-left: var(--space-sm);
}

/* Kanji Example Breakdown */
.kanji-example-breakdown {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-lg);
    padding: var(--space-xl);
    background: var(--color-bg-warm);
    border-radius: 16px;
    margin: var(--space-lg) 0;
    flex-wrap: wrap;
}

.example-kanji {
    display: flex;
    flex-direction: column;
    align-items: center;
}

.big-kanji {
    font-size: 4rem;
    line-height: 1;
    color: var(--color-primary);
}

.kanji-meaning {
    font-weight: 600;
    margin-top: var(--space-sm);
    text-transform: uppercase;
    letter-spacing: 0.1em;
}

.equals, .plus {
    font-size: 2rem;
    color: var(--color-text-muted);
}

.example-parts {
    display: flex;
    align-items: center;
    gap: var(--space-md);
}

.part {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: var(--space-md);
    background: var(--color-bg-card);
    border-radius: 12px;
    min-width: 80px;
}

.part-char {
    font-size: 2.5rem;
    color: var(--color-text);
}

.part-meaning {
    font-size: 0.875rem;
    color: var(--color-text-muted);
}

.example-story {
    text-align: center;
    font-style: italic;
    color: var(--color-text-secondary);
    margin-top: var(--space-md);
}

/* Kanji Types Grid */
.kanji-types-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-md);
    margin-top: var(--space-lg);
}

.type-card {
    padding: var(--space-lg);
    background: var(--color-bg-warm);
    border-radius: 16px;
    text-align: center;
}

.type-icon {
    font-size: 2rem;
    margin-bottom: var(--space-sm);
}

.type-card h4 {
    margin-bottom: var(--space-xs);
}

.type-card p {
    font-size: 0.875rem;
    color: var(--color-text-muted);
    margin-bottom: var(--space-md);
}

.type-examples {
    font-size: 1.5rem;
    letter-spacing: 0.3em;
    margin-bottom: var(--space-sm);
}

.type-hint {
    font-size: 0.75rem;
    color: var(--color-text-muted);
    font-style: italic;
}

/* Learning Path Preview */
.learning-path-preview {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-md);
    margin-top: var(--space-lg);
    flex-wrap: wrap;
}

.path-step {
    display: flex;
    align-items: center;
    gap: var(--space-md);
    padding: var(--space-md);
    background: var(--color-bg-warm);
    border-radius: 12px;
}

.step-number {
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--color-primary);
    color: white;
    border-radius: 50%;
    font-weight: 600;
}

.step-content h4 {
    font-size: 0.9375rem;
    margin-bottom: 2px;
}

.step-content p {
    font-size: 0.75rem;
    color: var(--color-text-muted);
}

.path-arrow {
    font-size: 1.5rem;
    color: var(--color-text-muted);
}

/* Intro Stats */
.intro-stats {
    display: flex;
    justify-content: center;
    gap: var(--space-xl);
    margin: var(--space-2xl) 0;
}

.stat-item {
    text-align: center;
}

.stat-number {
    display: block;
    font-size: 2.5rem;
    font-weight: 600;
    color: var(--color-primary);
}

.stat-label {
    font-size: 0.875rem;
    color: var(--color-text-muted);
}

/* Radicals Library */
.radicals-library,
.kanji-list-section {
    text-align: left;
}

.library-header {
    text-align: center;
    margin-bottom: var(--space-xl);
}

.library-header h2 {
    margin-bottom: var(--space-sm);
}

.library-header p {
    color: var(--color-text-secondary);
}

/* Category Filters */
.category-filters {
    display: flex;
    gap: var(--space-sm);
    margin-bottom: var(--space-lg);
    flex-wrap: wrap;
    justify-content: center;
}

.category-btn {
    display: flex;
    align-items: center;
    gap: var(--space-xs);
    padding: 8px 14px;
    border: 2px solid transparent;
    background: var(--color-bg-warm);
    border-radius: var(--radius-full);
    font-size: 0.8125rem;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.category-btn:hover {
    background: var(--color-sand);
}

.category-btn.active {
    background: var(--color-bg-card);
    border-color: var(--cat-color, var(--color-primary));
    color: var(--cat-color, var(--color-primary));
}

/* Radicals Progress */
.radicals-progress {
    margin-bottom: var(--space-lg);
}

.progress-info {
    display: flex;
    justify-content: space-between;
    font-size: 0.875rem;
    color: var(--color-text-muted);
    margin-bottom: var(--space-sm);
}

/* Radicals Grid */
.radicals-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(100px, 1fr));
    gap: var(--space-md);
}

.radical-card {
    position: relative;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: var(--space-lg) var(--space-md);
    background: var(--color-bg-card);
    border: 2px solid var(--color-sand);
    border-radius: 16px;
    cursor: pointer;
    transition: all var(--transition-normal);
}

.radical-card:hover {
    border-color: var(--cat-color, var(--color-primary));
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.radical-card.learned {
    background: var(--color-success-light);
    border-color: var(--color-success);
}

.radical-char {
    font-size: 2.5rem;
    line-height: 1;
    margin-bottom: var(--space-sm);
}

.radical-meaning {
    font-size: 0.75rem;
    font-weight: 500;
    text-align: center;
}

.radical-strokes {
    font-size: 0.625rem;
    color: var(--color-text-muted);
}

.learned-badge {
    position: absolute;
    top: 8px;
    right: 8px;
    width: 20px;
    height: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--color-success);
    color: white;
    border-radius: 50%;
    font-size: 0.75rem;
}

/* Radical Detail Modal - Enhanced */
.modal-radical-detail {
    max-width: 600px;
    max-height: 90vh;
    overflow-y: auto;
    padding: 0;
}

.modal-close-btn {
    position: absolute;
    top: var(--space-md);
    right: var(--space-md);
    width: 36px;
    height: 36px;
    border: none;
    background: var(--color-bg-warm);
    border-radius: 50%;
    font-size: 1.125rem;
    color: var(--color-text-muted);
    cursor: pointer;
    transition: all var(--transition-fast);
    z-index: 10;
}

.modal-close-btn:hover {
    background: var(--color-sand-dark);
    color: var(--color-text);
}

.radical-detail {
    text-align: left;
    padding: var(--space-xl) var(--space-2xl) var(--space-2xl);
}

.radical-detail h4 {
    font-size: 0.9375rem;
    color: var(--color-text-secondary);
    margin-bottom: var(--space-md);
    padding-bottom: var(--space-sm);
    border-bottom: 1px solid var(--color-sand);
}

.radical-detail-header {
    display: flex;
    align-items: flex-start;
    gap: var(--space-xl);
    margin-bottom: var(--space-2xl);
    padding-bottom: var(--space-xl);
    border-bottom: 1px solid var(--color-sand);
}

.radical-char-container {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-md);
}

.radical-detail-char {
    font-size: 6rem;
    line-height: 1;
}

.btn-audio-large {
    padding: 10px 20px;
    border: none;
    background: var(--color-bg-warm);
    border-radius: var(--radius-full);
    font-size: 1.25rem;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.btn-audio-large:hover {
    background: var(--color-sand-dark);
    /* Removed transform to prevent layout shift */
}

.radical-detail-info {
    flex: 1;
}

.radical-detail-info h3 {
    font-size: 1.75rem;
    margin-bottom: var(--space-sm);
    text-transform: capitalize;
}

.radical-name {
    font-size: 1rem;
    color: var(--color-text-secondary);
    margin-bottom: var(--space-xs);
}

.radical-name strong {
    color: var(--color-text);
}

.radical-strokes {
    font-size: 0.875rem;
    color: var(--color-text-muted);
    margin-bottom: var(--space-md);
}

.radical-category-badge {
    display: inline-flex;
    align-items: center;
    gap: var(--space-xs);
    padding: 6px 14px;
    border-radius: var(--radius-full);
    font-size: 0.8125rem;
    font-weight: 500;
    color: white;
}

/* Stroke Order Section */
.radical-stroke-section {
    margin-bottom: var(--space-2xl);
}

.stroke-order-display {
    display: flex;
    align-items: center;
    gap: var(--space-xl);
    padding: var(--space-lg);
    background: var(--color-bg-warm);
    border-radius: 16px;
    margin-bottom: var(--space-md);
}

.stroke-demo-area {
    width: 120px;
    height: 120px;
    background: white;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    border: 2px dashed var(--color-sand-dark);
}

.stroke-demo-area.animating {
    border-color: var(--color-primary);
}

.stroke-demo-char {
    font-size: 5rem;
    line-height: 1;
    color: var(--color-text);
    transition: opacity 0.3s ease;
}

.stroke-demo-area.animating .stroke-demo-char {
    animation: strokeFade 2s ease-in-out;
}

@keyframes strokeFade {
    0% { opacity: 0; }
    50% { opacity: 1; }
    100% { opacity: 1; }
}

.stroke-controls {
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
}

.btn-sm {
    padding: 8px 16px;
    font-size: 0.875rem;
}

.stroke-count {
    font-size: 0.875rem;
    color: var(--color-text-muted);
}

.stroke-hint {
    font-size: 0.8125rem;
    color: var(--color-text-muted);
    font-style: italic;
}

/* Memory Tips Section */
.radical-mnemonic-section {
    margin-bottom: var(--space-2xl);
}

.mnemonic-list {
    display: flex;
    flex-direction: column;
    gap: var(--space-md);
}

.mnemonic-item {
    display: flex;
    gap: var(--space-md);
    padding: var(--space-md) var(--space-lg);
    background: var(--color-bg-warm);
    border-radius: 12px;
}

.mnemonic-bullet {
    font-size: 1.25rem;
    flex-shrink: 0;
}

.mnemonic-item p {
    font-size: 0.9375rem;
    line-height: 1.6;
    margin: 0;
}

/* Example Word Section */
.radical-example-word-section {
    margin-bottom: var(--space-2xl);
}

.example-word-card {
    padding: var(--space-lg);
    background: var(--color-bg-warm);
    border-radius: 16px;
}

.example-word-main {
    display: flex;
    align-items: center;
    gap: var(--space-md);
    margin-bottom: var(--space-sm);
}

.example-word-kanji {
    font-size: 2rem;
}

.example-word-details {
    display: flex;
    gap: var(--space-md);
    margin-bottom: var(--space-md);
}

.example-word-reading {
    font-size: 1.125rem;
    color: var(--color-text-secondary);
}

.example-word-meaning {
    font-size: 1rem;
    color: var(--color-text-muted);
}

.example-word-highlight {
    font-size: 0.875rem;
    color: var(--color-text-secondary);
    padding-top: var(--space-md);
    border-top: 1px solid var(--color-sand);
    margin: 0;
}

.highlight-char {
    font-size: 1.25rem;
    font-weight: 600;
}

/* Kanji Examples Section */
.radical-examples-section {
    margin-bottom: var(--space-2xl);
}

.examples-grid-enhanced {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(80px, 1fr));
    gap: var(--space-md);
}

.example-kanji-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-xs);
    padding: var(--space-md);
    background: var(--color-bg-warm);
    border-radius: 12px;
    cursor: pointer;
    transition: all var(--transition-fast);
    position: relative;
}

.example-kanji-item:hover {
    background: var(--color-sand);
    transform: translateY(-2px);
}

.example-kanji-item.in-vocab {
    border: 2px solid var(--color-primary-light);
}

.example-kanji-char {
    font-size: 1.75rem;
}

.btn-audio-sm {
    padding: 4px 8px;
    border: none;
    background: transparent;
    font-size: 0.875rem;
    cursor: pointer;
    opacity: 0.6;
    transition: opacity var(--transition-fast);
}

.btn-audio-sm:hover {
    opacity: 1;
}

.in-vocab-badge {
    font-size: 0.625rem;
    color: var(--color-primary);
    font-weight: 500;
}

.more-examples {
    font-size: 0.875rem;
    color: var(--color-text-muted);
    text-align: center;
    margin-top: var(--space-md);
}

/* Practice Section */
.radical-practice-section {
    margin-bottom: var(--space-2xl);
}

.practice-canvas-placeholder {
    padding: var(--space-lg);
    background: var(--color-bg-warm);
    border-radius: 16px;
    text-align: center;
}

.practice-grid {
    width: 150px;
    height: 150px;
    margin: 0 auto var(--space-md);
    background: white;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    border: 2px dashed var(--color-sand-dark);
    position: relative;
}

.practice-ghost {
    font-size: 5rem;
    color: var(--color-sand-dark);
    opacity: 0.3;
}

.practice-hint {
    font-size: 0.8125rem;
    color: var(--color-text-muted);
    margin: 0;
}

/* Modal Actions */
.radical-modal-actions {
    display: flex;
    justify-content: center;
    padding-top: var(--space-xl);
    border-top: 1px solid var(--color-sand);
}

.btn-large {
    padding: 14px 32px;
    font-size: 1rem;
}

.already-learned-badge {
    display: inline-flex;
    align-items: center;
    gap: var(--space-sm);
    padding: 14px 32px;
    background: var(--color-success-light);
    color: var(--color-success);
    border-radius: var(--radius-full);
    font-weight: 600;
}

/* Legacy styles for backward compatibility */
.radical-mnemonic {
    background: var(--color-bg-warm);
    padding: var(--space-lg);
    border-radius: 12px;
    margin-bottom: var(--space-lg);
}

.radical-mnemonic h4 {
    font-size: 0.875rem;
    color: var(--color-text-muted);
    margin-bottom: var(--space-sm);
    border: none;
    padding: 0;
}

.radical-mnemonic p {
    font-size: 1rem;
    line-height: 1.6;
}

.radical-examples h4 {
    font-size: 0.875rem;
    color: var(--color-text-muted);
    margin-bottom: var(--space-md);
    border: none;
    padding: 0;
}

.examples-grid {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-sm);
}

.example-kanji-chip {
    padding: 8px 14px;
    background: var(--color-bg-warm);
    border-radius: var(--radius-md);
    font-size: 1.25rem;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.example-kanji-chip:hover {
    background: var(--color-primary);
    color: white;
}

.already-learned {
    color: var(--color-success);
    font-weight: 500;
}

/* Kanji Grid */
.kanji-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(70px, 1fr));
    gap: var(--space-sm);
}

.kanji-card {
    position: relative;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: var(--space-md);
    background: var(--color-bg-card);
    border: 2px solid var(--color-sand);
    border-radius: 12px;
    cursor: pointer;
    transition: all var(--transition-fast);
    aspect-ratio: 1;
}

.kanji-card:hover {
    border-color: var(--color-primary);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.kanji-card.seen {
    border-color: var(--color-sage);
    background: rgba(91, 168, 192, 0.1);
}

.kanji-card.learning {
    border-color: var(--color-ochre);
    background: rgba(249, 115, 22, 0.1);
}

.kanji-card.mastered {
    border-color: var(--color-success);
    background: var(--color-success-light);
}

.kanji-card-char {
    font-size: 2rem;
    line-height: 1;
}

.kanji-card-info {
    display: flex;
    align-items: center;
    gap: var(--space-xs);
    margin-top: var(--space-xs);
}

.kanji-card-count {
    font-size: 0.625rem;
    color: var(--color-text-muted);
}

.status-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
}

.status-dot.seen { background: var(--color-sage); }
.status-dot.learning { background: var(--color-ochre); }
.status-dot.mastered { background: var(--color-success); }

.load-more-hint {
    text-align: center;
    margin-top: var(--space-lg);
    color: var(--color-text-muted);
    font-size: 0.875rem;
}

/* Kanji Detail Modal */
.kanji-detail-modal {
    max-width: 500px;
    max-height: 90vh;
    overflow-y: auto;
}

.kanji-detail-header {
    display: flex;
    gap: var(--space-lg);
    margin-bottom: var(--space-xl);
    align-items: flex-start;
}

.kanji-main-display {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-sm);
}

.kanji-huge {
    font-size: 5rem;
    line-height: 1;
    color: var(--color-primary);
}

.kanji-basic-info {
    flex: 1;
}

.info-row {
    margin-bottom: var(--space-sm);
    font-size: 0.9375rem;
}

.info-label {
    font-weight: 500;
    color: var(--color-text-muted);
    margin-right: var(--space-sm);
}

/* Stroke Order */
.stroke-order-section {
    margin-bottom: var(--space-lg);
}

.stroke-order-section h4 {
    font-size: 0.875rem;
    color: var(--color-text-muted);
    margin-bottom: var(--space-md);
}

.stroke-display {
    background: var(--color-bg-warm);
    border-radius: 12px;
    padding: var(--space-lg);
    text-align: center;
}

.stroke-placeholder {
    display: flex;
    flex-direction: column;
    align-items: center;
}

.kanji-stroke-demo {
    font-size: 4rem;
    color: var(--color-text);
    margin-bottom: var(--space-sm);
}

.stroke-hint {
    font-size: 0.875rem;
    color: var(--color-text-muted);
}

/* Readings Section */
.readings-section {
    margin-bottom: var(--space-lg);
}

.readings-section h4 {
    font-size: 0.875rem;
    color: var(--color-text-muted);
    margin-bottom: var(--space-md);
}

.readings-grid {
    display: flex;
    flex-direction: column;
    gap: var(--space-md);
}

.reading-group {
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
}

.reading-type {
    font-size: 0.75rem;
    font-weight: 500;
    color: var(--color-text-muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.reading-list {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-sm);
}

.reading-chip {
    padding: 6px 12px;
    border-radius: var(--radius-full);
    font-size: 1rem;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.reading-chip.on {
    background: #DBEAFE;
    color: #1E40AF;
}

.reading-chip.kun {
    background: #DCFCE7;
    color: #166534;
}

.reading-chip:hover {
    transform: scale(1.05);
}

/* Radical Breakdown */
.radical-breakdown-section {
    margin-bottom: var(--space-lg);
}

.radical-breakdown-section h4 {
    font-size: 0.875rem;
    color: var(--color-text-muted);
    margin-bottom: var(--space-md);
}

.radical-breakdown {
    display: flex;
    gap: var(--space-md);
    flex-wrap: wrap;
    margin-bottom: var(--space-md);
}

.breakdown-part {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: var(--space-md);
    background: var(--color-bg-warm);
    border-radius: 12px;
    min-width: 70px;
}

.breakdown-char {
    font-size: 2rem;
    color: var(--color-primary);
}

.breakdown-meaning {
    font-size: 0.75rem;
    color: var(--color-text-muted);
}

.mnemonic-suggestion {
    padding: var(--space-md);
    background: var(--color-success-light);
    border-radius: 8px;
    font-size: 0.875rem;
}

/* Vocab Words Section */
.vocab-words-section {
    margin-bottom: var(--space-lg);
}

.vocab-words-section h4 {
    font-size: 0.875rem;
    color: var(--color-text-muted);
    margin-bottom: var(--space-md);
}

.vocab-words-list {
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
}

.vocab-word-item {
    display: grid;
    grid-template-columns: auto auto 1fr;
    gap: var(--space-md);
    padding: var(--space-sm) var(--space-md);
    background: var(--color-bg-warm);
    border-radius: 8px;
    align-items: center;
}

.vocab-word {
    font-size: 1.125rem;
    font-weight: 500;
}

.vocab-reading {
    color: var(--color-text-secondary);
    font-size: 0.875rem;
}

.vocab-meaning {
    color: var(--color-text-muted);
    font-size: 0.875rem;
}

.more-words {
    font-size: 0.875rem;
    color: var(--color-text-muted);
    text-align: center;
    padding: var(--space-sm);
}

/* Similar Kanji */
.similar-kanji-section {
    margin-bottom: var(--space-lg);
    padding: var(--space-md);
    background: #FEF3C7;
    border-radius: 12px;
}

.similar-kanji-section h4 {
    font-size: 0.875rem;
    color: #92400E;
    margin-bottom: var(--space-md);
}

.similar-kanji-list {
    display: flex;
    gap: var(--space-sm);
}

.similar-kanji-chip {
    padding: 8px 14px;
    background: white;
    border-radius: 8px;
    font-size: 1.5rem;
}

/* Status Actions */
.kanji-status-actions {
    display: flex;
    align-items: center;
    gap: var(--space-md);
    margin-bottom: var(--space-lg);
    flex-wrap: wrap;
}

.status-label {
    font-size: 0.875rem;
    color: var(--color-text-muted);
}

.status-buttons {
    display: flex;
    gap: var(--space-sm);
}

.status-btn {
    padding: 8px 16px;
    border: 2px solid var(--color-sand);
    background: var(--color-bg-card);
    border-radius: var(--radius-full);
    font-size: 0.875rem;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.status-btn:hover {
    border-color: var(--color-primary);
}

.status-btn.active {
    background: var(--color-primary);
    border-color: var(--color-primary);
    color: white;
}

.close-btn {
    width: 100%;
}

.loading-state {
    text-align: center;
    padding: var(--space-2xl);
    color: var(--color-text-muted);
}

/* Kanji Section Responsive */
@media (max-width: 768px) {
    .kanji-tabs {
        flex-direction: column;
    }

    .kanji-types-grid {
        grid-template-columns: 1fr;
    }

    .kanji-example-breakdown {
        flex-direction: column;
    }

    .learning-path-preview {
        flex-direction: column;
    }

    .path-arrow {
        transform: rotate(90deg);
    }

    .radicals-grid {
        grid-template-columns: repeat(auto-fill, minmax(80px, 1fr));
    }

    .kanji-grid {
        grid-template-columns: repeat(auto-fill, minmax(60px, 1fr));
    }

    .kanji-detail-header {
        flex-direction: column;
        align-items: center;
        text-align: center;
    }

    .category-filters {
        justify-content: flex-start;
        overflow-x: auto;
        flex-wrap: nowrap;
        padding-bottom: var(--space-sm);
    }

    .intro-stats {
        flex-direction: column;
        gap: var(--space-md);
    }
}

/* ===========================================
   Grammar Introduction Cards
   =========================================== */

.intro-cards-container {
    display: flex;
    flex-direction: column;
    gap: var(--space-lg);
}

.grammar-intro-card {
    background: var(--color-bg-card);
    border-radius: var(--radius-lg);
    padding: var(--space-lg);
    border: 1px solid var(--color-sand);
    transition: box-shadow var(--transition-normal);
}

.grammar-intro-card:hover {
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.08);
}

.intro-card-header {
    display: flex;
    align-items: center;
    gap: var(--space-md);
    margin-bottom: var(--space-lg);
    padding-bottom: var(--space-md);
    border-bottom: 2px solid var(--color-sand);
}

.intro-card-number {
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--color-terracotta);
    color: white;
    border-radius: 50%;
    font-weight: 700;
    font-size: 1rem;
    flex-shrink: 0;
}

.intro-card-titles {
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.intro-card-title-jp {
    font-family: var(--font-japanese);
    color: var(--color-terracotta);
    font-size: 0.875rem;
}

.intro-card-title {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--color-text);
}

.intro-card-content {
    display: flex;
    flex-direction: column;
    gap: var(--space-md);
}

.intro-heading {
    font-size: 1rem;
    font-weight: 600;
    color: var(--color-text);
    margin-top: var(--space-sm);
}

.intro-text {
    font-size: 0.9375rem;
    color: var(--color-text-secondary);
    line-height: 1.6;
}

.intro-example {
    background: var(--color-bg-warm);
    padding: var(--space-md);
    border-radius: var(--radius-md);
    border-left: 3px solid var(--color-terracotta);
}

.intro-example-jp {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    font-size: 1.25rem;
    margin-bottom: var(--space-xs);
}

.intro-example-reading {
    font-size: 0.875rem;
    color: var(--color-text-muted);
    margin-bottom: var(--space-xs);
}

.intro-example-en {
    font-size: 0.9375rem;
    color: var(--color-text);
}

.intro-example-literal {
    font-size: 0.8125rem;
    color: var(--color-text-muted);
    font-style: italic;
    margin-top: var(--space-xs);
}

.intro-particle-list {
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
    background: var(--color-bg-warm);
    padding: var(--space-md);
    border-radius: var(--radius-md);
}

.intro-particle-item {
    display: flex;
    align-items: center;
    gap: var(--space-md);
}

.intro-particle {
    font-family: var(--font-japanese);
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--color-terracotta);
    width: 32px;
    text-align: center;
}

.intro-particle-desc {
    font-size: 0.9375rem;
    color: var(--color-text-secondary);
}

.intro-tip {
    display: flex;
    align-items: flex-start;
    gap: var(--space-sm);
    background: rgba(76, 175, 80, 0.1);
    padding: var(--space-md);
    border-radius: var(--radius-md);
    border: 1px solid rgba(76, 175, 80, 0.3);
}

.tip-icon {
    font-size: 1.25rem;
    flex-shrink: 0;
}

.intro-tip span:last-child {
    font-size: 0.9375rem;
    color: var(--color-text);
    line-height: 1.5;
}

.intro-warning {
    display: flex;
    align-items: flex-start;
    gap: var(--space-sm);
    background: rgba(255, 152, 0, 0.1);
    padding: var(--space-md);
    border-radius: var(--radius-md);
    border: 1px solid rgba(255, 152, 0, 0.3);
}

.warning-icon {
    font-size: 1.25rem;
    flex-shrink: 0;
}

.intro-warning span:last-child {
    font-size: 0.9375rem;
    color: var(--color-text);
    line-height: 1.5;
}

.intro-irregulars {
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
    background: var(--color-bg-warm);
    padding: var(--space-md);
    border-radius: var(--radius-md);
}

.irregular-verb {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    flex-wrap: wrap;
}

.irregular-verb .arrow {
    color: var(--color-text-muted);
}

.irregular-verb .meaning {
    font-size: 0.875rem;
    color: var(--color-text-muted);
}

.intro-levels {
    display: flex;
    flex-direction: column;
    gap: var(--space-md);
}

.level-item {
    background: var(--color-bg-warm);
    padding: var(--space-md);
    border-radius: var(--radius-md);
}

.level-header {
    display: flex;
    align-items: center;
    gap: var(--space-md);
    margin-bottom: var(--space-xs);
}

.level-name {
    font-weight: 600;
    color: var(--color-text);
    min-width: 140px;
}

.level-example {
    font-family: var(--font-japanese);
    font-size: 1.125rem;
    color: var(--color-terracotta);
}

.level-desc {
    font-size: 0.875rem;
    color: var(--color-text-muted);
}

.intro-checklist {
    list-style: none;
    padding: 0;
    margin: 0;
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
}

.intro-checklist li {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    font-size: 0.9375rem;
    color: var(--color-text-secondary);
}

.intro-checklist li::before {
    content: '☐';
    color: var(--color-terracotta);
    font-size: 1.125rem;
}

.intro-callout {
    background: linear-gradient(135deg, var(--color-terracotta) 0%, #C75B39 100%);
    color: white;
    padding: var(--space-md);
    border-radius: var(--radius-md);
    font-size: 0.9375rem;
    line-height: 1.5;
}

/* Grammar intro responsive */
@media (max-width: 768px) {
    .grammar-intro-card {
        padding: var(--space-md);
    }

    .intro-card-header {
        gap: var(--space-sm);
    }

    .intro-card-number {
        width: 30px;
        height: 30px;
        font-size: 0.875rem;
    }

    .intro-card-title {
        font-size: 1.125rem;
    }

    .intro-example-jp {
        font-size: 1.125rem;
    }

    .level-header {
        flex-direction: column;
        align-items: flex-start;
        gap: var(--space-xs);
    }

    .level-name {
        min-width: auto;
    }
}

/* ===========================================
   Learning Path & Stage System
   =========================================== */

/* Learning Path Component */
.learning-path {
    padding: var(--space-lg);
}

.learning-path-header {
    text-align: center;
    margin-bottom: var(--space-xl);
}

.learning-path-title {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: var(--space-sm);
}

.next-milestone {
    display: inline-flex;
    align-items: center;
    gap: var(--space-sm);
    padding: var(--space-sm) var(--space-md);
    background: var(--color-bg-warm);
    border-radius: var(--radius-full);
    font-size: 0.875rem;
}

.milestone-label {
    color: var(--color-text-muted);
}

.milestone-text {
    color: var(--color-primary);
    font-weight: 500;
}

/* Learning Path Tree */
.learning-path-tree {
    display: flex;
    flex-direction: column;
    gap: var(--space-md);
    margin-bottom: var(--space-xl);
}

.stage-node {
    position: relative;
}

.stage-connector {
    position: absolute;
    left: 24px;
    top: -16px;
    width: 2px;
    height: 16px;
    background: var(--color-sand);
}

.stage-connector.complete {
    background: var(--color-success);
}

.stage-card {
    display: flex;
    flex-direction: column;
    background: var(--color-bg-card);
    border: 2px solid var(--color-sand);
    border-radius: var(--radius-lg);
    padding: var(--space-lg);
    transition: all var(--transition-normal);
}

.stage-node.stage-active .stage-card {
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(26, 127, 100, 0.1);
}

.stage-node.stage-complete .stage-card {
    border-color: var(--color-success);
    background: var(--color-success-light);
}

.stage-node.stage-locked .stage-card {
    opacity: 0.5;
}

.stage-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--space-sm);
}

.stage-icon {
    font-size: 1.5rem;
}

.stage-status-icon {
    font-size: 1rem;
}

.stage-content {
    flex: 1;
}

.stage-name {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: var(--space-xs);
}

.stage-description {
    font-size: 0.875rem;
    color: var(--color-text-secondary);
    margin-bottom: var(--space-md);
}

.stage-progress-bar {
    height: 6px;
    background: var(--color-sand);
    border-radius: 3px;
    overflow: hidden;
    margin-bottom: var(--space-sm);
}

.stage-progress-fill {
    height: 100%;
    background: var(--color-primary);
    border-radius: 3px;
    transition: width var(--transition-normal);
}

.stage-progress-text {
    font-size: 0.75rem;
    color: var(--color-text-muted);
}

.stage-details {
    margin-top: var(--space-md);
    padding-top: var(--space-md);
    border-top: 1px solid var(--color-sand);
}

.stage-detail-item {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    font-size: 0.875rem;
    color: var(--color-text-secondary);
    padding: var(--space-xs) 0;
}

.stage-detail-item.complete {
    color: var(--color-success);
}

.stage-detail-item.muted {
    color: var(--color-text-muted);
}

.detail-progress {
    color: var(--color-text-muted);
    margin-left: auto;
}

/* Learning Path Action */
.learning-path-action {
    text-align: center;
}

.start-study-btn {
    display: inline-flex;
    align-items: center;
    gap: var(--space-md);
    font-size: 1.125rem;
    padding: var(--space-lg) var(--space-2xl);
}

.btn-icon {
    font-size: 1.5rem;
}

.action-hint {
    margin-top: var(--space-md);
    font-size: 0.875rem;
    color: var(--color-text-muted);
}

/* Compact Learning Path */
.learning-path-compact {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--space-md);
    background: var(--color-bg-card);
    border-radius: var(--radius-md);
}

.compact-stages {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
}

.compact-stage {
    display: flex;
    align-items: center;
    gap: var(--space-xs);
    opacity: 0.5;
}

.compact-stage.complete,
.compact-stage.active {
    opacity: 1;
}

.compact-icon {
    font-size: 1.25rem;
}

.compact-connector {
    color: var(--color-sand);
}

.compact-connector.complete {
    color: var(--color-success);
}

/* ===========================================
   Resource Dropdown
   =========================================== */

.resource-dropdown {
    position: relative;
}

.resource-dropdown-trigger {
    display: flex;
    align-items: center;
    gap: var(--space-xs);
}

.dropdown-arrow {
    font-size: 0.625rem;
    transition: transform var(--transition-fast);
}

.dropdown-arrow.open {
    transform: rotate(180deg);
}

.resource-dropdown-menu {
    position: absolute;
    top: calc(100% + 8px);
    right: 0;
    min-width: 260px;
    background: var(--color-bg-card);
    border: 1px solid var(--color-sand);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-lg);
    z-index: 1000;
    overflow: hidden;
}

.resource-dropdown-item {
    display: flex;
    align-items: center;
    gap: var(--space-md);
    width: 100%;
    padding: var(--space-md) var(--space-lg);
    border: none;
    background: transparent;
    text-align: left;
    cursor: pointer;
    transition: background var(--transition-fast);
}

.resource-dropdown-item:hover {
    background: var(--color-bg-warm);
}

.resource-dropdown-item.active {
    background: var(--color-success-light);
}

.resource-icon {
    font-size: 1.25rem;
    width: 32px;
    text-align: center;
}

.resource-info {
    flex: 1;
    display: flex;
    flex-direction: column;
}

.resource-label {
    font-weight: 500;
    color: var(--color-text);
}

.resource-description {
    font-size: 0.75rem;
    color: var(--color-text-muted);
}

.resource-active-indicator {
    color: var(--color-success);
    font-weight: 600;
}

/* ===========================================
   Dashboard Stage Progress
   =========================================== */

.dashboard-learning-path {
    margin-bottom: var(--space-lg);
}

.stage-progress-row {
    display: flex;
    justify-content: space-between;
    gap: var(--space-md);
    margin-bottom: var(--space-lg);
    overflow-x: auto;
    padding-bottom: var(--space-sm);
}

.stage-indicator {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-xs);
    min-width: 100px;
    text-align: center;
    position: relative;
    flex: 1;
}

.stage-indicator.locked {
    opacity: 0.4;
}

.stage-indicator.complete .stage-indicator-icon {
    color: var(--color-success);
}

.stage-indicator.active .stage-indicator-icon {
    color: var(--color-primary);
}

.stage-indicator-icon {
    font-size: 1.5rem;
}

.stage-indicator-name {
    font-size: 0.75rem;
    font-weight: 500;
    color: var(--color-text-secondary);
}

.stage-indicator-progress {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 2px;
    width: 100%;
}

.mini-progress-bar {
    width: 60px;
    height: 4px;
    background: var(--color-sand);
    border-radius: 2px;
    overflow: hidden;
}

.mini-progress-fill {
    height: 100%;
    background: var(--color-primary);
    border-radius: 2px;
}

.mini-progress-text {
    font-size: 0.625rem;
    color: var(--color-text-muted);
}

.stage-connector-line {
    position: absolute;
    right: -50%;
    top: 12px;
    width: 100%;
    height: 2px;
    background: var(--color-sand);
    z-index: -1;
}

.stage-connector-line.complete {
    background: var(--color-success);
}

.current-stage-info {
    text-align: center;
    padding: var(--space-md);
    background: var(--color-bg-warm);
    border-radius: var(--radius-md);
}

.current-stage-label {
    font-size: 0.75rem;
    color: var(--color-text-muted);
    margin-bottom: var(--space-xs);
}

.current-stage-name {
    font-size: 1rem;
    font-weight: 600;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-sm);
}

.current-stage-icon {
    font-size: 1.25rem;
}

.next-milestone-text {
    font-size: 0.8125rem;
    color: var(--color-primary);
    margin-top: var(--space-xs);
}

/* Detailed Learning Path */
.detailed-learning-path {
    display: flex;
    flex-direction: column;
    gap: var(--space-md);
}

.learning-stage-card {
    background: var(--color-bg-card);
    border: 1px solid var(--color-sand);
    border-radius: var(--radius-md);
    padding: var(--space-md);
    transition: all var(--transition-fast);
    cursor: pointer;
}

.learning-stage-card:hover:not(.soft-locked) {
    border-color: var(--color-terracotta);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}

.learning-stage-card.active {
    border-color: var(--color-primary);
    box-shadow: 0 0 0 1px var(--color-primary);
}

.learning-stage-card.active:hover {
    border-color: var(--color-terracotta);
}

.learning-stage-card.complete {
    background: var(--color-success-light);
    border-color: var(--color-success);
}

.learning-stage-card.complete:hover {
    border-color: var(--color-success);
}

.learning-stage-card.soft-locked {
    opacity: 0.6;
    background: var(--color-bg-warm);
    cursor: not-allowed;
}

.learning-stage-card.soft-locked:hover {
    transform: none;
    box-shadow: none;
}

.stage-header {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    margin-bottom: var(--space-sm);
}

.stage-icon {
    font-size: 1.25rem;
}

.stage-name {
    font-weight: 600;
    font-size: 0.9375rem;
}

.stage-complete-badge {
    margin-left: auto;
    font-size: 0.625rem;
    font-weight: 600;
    text-transform: uppercase;
    color: var(--color-success);
    background: white;
    padding: 2px 8px;
    border-radius: var(--radius-full);
}

.stage-submilestones {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-sm);
    margin-top: var(--space-sm);
}

.submilestone {
    display: flex;
    align-items: center;
    gap: var(--space-xs);
    background: var(--color-bg);
    padding: 4px 10px;
    border-radius: var(--radius-sm);
    font-size: 0.75rem;
}

.submilestone.complete {
    background: var(--color-success-light);
    color: var(--color-success);
}

.submilestone.locked {
    opacity: 0.5;
}

.submilestone-icon {
    font-size: 0.875rem;
}

.submilestone-name {
    color: var(--color-text-secondary);
}

.submilestone-progress {
    font-weight: 600;
    color: var(--color-text);
}

.submilestone.complete .submilestone-progress {
    color: var(--color-success);
}

.soft-lock-message {
    font-size: 0.6875rem;
    color: var(--color-text-muted);
    font-style: italic;
    margin-top: var(--space-sm);
    text-align: center;
}

.stage-progress-bar {
    height: 4px;
    background: var(--color-sand);
    border-radius: 2px;
    overflow: hidden;
    margin-top: var(--space-sm);
}

.stage-progress-fill {
    height: 100%;
    background: var(--color-primary);
    border-radius: 2px;
    transition: width var(--transition-normal);
}

/* ===========================================
   Progress Page
   =========================================== */

.progress-page {
    padding: var(--space-lg);
    max-width: 900px;
    margin: 0 auto;
}

.progress-tabs {
    display: flex;
    gap: var(--space-sm);
    margin-bottom: var(--space-xl);
    background: var(--color-bg-warm);
    padding: 6px;
    border-radius: var(--radius-full);
}

.progress-tab {
    flex: 1;
    padding: 10px 16px;
    border: none;
    background: transparent;
    border-radius: var(--radius-full);
    font-size: 0.9375rem;
    font-weight: 500;
    cursor: pointer;
    transition: all var(--transition-fast);
    color: var(--color-text-secondary);
}

.progress-tab:hover {
    background: var(--color-sand);
}

.progress-tab.active {
    background: var(--color-bg-card);
    color: var(--color-text);
    box-shadow: var(--shadow-sm);
}

.progress-content {
    display: flex;
    flex-direction: column;
    gap: var(--space-xl);
}

/* Progress Learning Path */
.progress-learning-path h3,
.progress-vocab-stats h3,
.progress-radical-stats h3,
.progress-study-stats h3,
.progress-achievements h3 {
    font-size: 1.125rem;
    margin-bottom: var(--space-lg);
    padding-bottom: var(--space-sm);
    border-bottom: 2px solid var(--color-sand);
}

.progress-stages {
    display: flex;
    flex-direction: column;
    gap: var(--space-md);
}

.progress-stage {
    display: flex;
    align-items: center;
    gap: var(--space-md);
    padding: var(--space-md);
    background: var(--color-bg-card);
    border-radius: var(--radius-md);
    border: 1px solid var(--color-sand);
}

.progress-stage.complete {
    border-color: var(--color-success);
    background: var(--color-success-light);
}

.progress-stage.active {
    border-color: var(--color-primary);
}

.progress-stage-icon {
    font-size: 1.5rem;
}

.progress-stage-info {
    flex: 1;
}

.progress-stage-name {
    font-weight: 600;
    margin-bottom: 2px;
}

.progress-stage-progress {
    font-size: 0.875rem;
    color: var(--color-text-muted);
}

.progress-stage-bar {
    width: 100px;
    height: 6px;
    background: var(--color-sand);
    border-radius: 3px;
    overflow: hidden;
}

.progress-stage-fill {
    height: 100%;
    background: var(--color-primary);
    border-radius: 3px;
}

/* Vocab Stats */
.vocab-stats-grid,
.radical-stats-grid,
.study-stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
    gap: var(--space-md);
    margin-bottom: var(--space-lg);
}

.vocab-stat-card,
.radical-stat-card,
.study-stat-card {
    text-align: center;
    padding: var(--space-lg);
    background: var(--color-bg-card);
    border-radius: var(--radius-md);
    border: 1px solid var(--color-sand);
}

.vocab-stat-value,
.radical-stat-value,
.study-stat-value {
    font-size: 2rem;
    font-weight: 600;
    color: var(--color-primary);
}

.vocab-stat-label,
.radical-stat-label,
.study-stat-label {
    font-size: 0.875rem;
    color: var(--color-text-muted);
}

.study-stat-icon {
    font-size: 1.5rem;
    margin-bottom: var(--space-sm);
}

/* Progress Bars */
.vocab-progress-section,
.radical-progress-section {
    background: var(--color-bg-card);
    padding: var(--space-lg);
    border-radius: var(--radius-md);
    border: 1px solid var(--color-sand);
}

.vocab-progress-header,
.radical-progress-header {
    display: flex;
    justify-content: space-between;
    margin-bottom: var(--space-sm);
    font-size: 0.875rem;
}

.vocab-progress-bar,
.radical-progress-bar {
    height: 12px;
    background: var(--color-sand);
    border-radius: 6px;
    overflow: hidden;
    position: relative;
}

.vocab-progress-fill,
.radical-progress-fill {
    height: 100%;
    border-radius: 6px;
    transition: width var(--transition-normal);
}

.vocab-progress-fill.known {
    background: var(--color-success);
    position: absolute;
}

.vocab-progress-fill.learning {
    background: var(--color-ochre);
    position: absolute;
}

.vocab-progress-legend {
    display: flex;
    gap: var(--space-lg);
    margin-top: var(--space-sm);
    font-size: 0.75rem;
}

.legend-item.known {
    color: var(--color-success);
}

.legend-item.learning {
    color: var(--color-ochre);
}

/* Achievements */
.achievements-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(120px, 1fr));
    gap: var(--space-md);
}

.achievement-card {
    position: relative;
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: var(--space-lg);
    background: var(--color-bg-card);
    border-radius: var(--radius-md);
    border: 1px solid var(--color-sand);
    text-align: center;
    transition: all var(--transition-fast);
}

.achievement-card.earned {
    border-color: var(--color-primary);
    background: linear-gradient(135deg, rgba(26, 127, 100, 0.05) 0%, rgba(26, 127, 100, 0.1) 100%);
}

.achievement-card.locked {
    opacity: 0.5;
}

.achievement-icon {
    font-size: 2rem;
    margin-bottom: var(--space-sm);
}

.achievement-name {
    font-size: 0.75rem;
    font-weight: 600;
}

.achievement-lock {
    position: absolute;
    top: var(--space-sm);
    right: var(--space-sm);
    font-size: 0.75rem;
}

/* ===========================================
   Smart Study Session
   =========================================== */

.card-type-badge {
    display: inline-block;
    padding: var(--space-xs) var(--space-md);
    background: var(--color-primary);
    color: white;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    border-radius: var(--radius-full);
    margin-bottom: var(--space-lg);
}

.card-type-badge.grammar {
    background: var(--color-ochre);
}

.card-type-badge.heisig {
    background: var(--color-terracotta);
}

.dependency-warning {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    padding: var(--space-sm) var(--space-md);
    background: #FEF3C7;
    border-radius: var(--radius-sm);
    font-size: 0.8125rem;
    margin-top: var(--space-md);
}

.warning-icon {
    font-size: 1rem;
}

.missing-radicals {
    color: var(--color-ochre);
    font-weight: 600;
}

/* Radical Card */
.radical-card-content {
    text-align: center;
}

.radical-main-display {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-md);
    margin-bottom: var(--space-lg);
}

.radical-char-large {
    font-size: 5rem;
    line-height: 1;
}

.radical-meaning-large {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--color-text);
    margin-bottom: var(--space-sm);
}

.radical-name {
    font-size: 0.875rem;
    color: var(--color-text-muted);
    margin-bottom: var(--space-lg);
}

.radical-mnemonic-section,
.radical-examples-section {
    text-align: left;
    margin-bottom: var(--space-lg);
}

.radical-mnemonic-text {
    font-size: 1rem;
    line-height: 1.6;
    color: var(--color-text-secondary);
    padding: var(--space-md);
    background: var(--color-bg-warm);
    border-radius: var(--radius-md);
}

.radical-examples {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-sm);
}

.radical-example-kanji {
    padding: var(--space-sm) var(--space-md);
    background: var(--color-bg-warm);
    border-radius: var(--radius-sm);
    font-size: 1.5rem;
}

.radical-category {
    font-size: 0.8125rem;
    color: var(--color-text-muted);
    margin-top: var(--space-md);
}

/* Intro Card */
.intro-card-content {
    text-align: center;
}

.intro-card-title {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--color-primary);
    margin-bottom: var(--space-lg);
}

.intro-card-text {
    font-size: 1rem;
    line-height: 1.7;
    color: var(--color-text-secondary);
    margin-bottom: var(--space-lg);
}

.intro-card-example {
    padding: var(--space-lg);
    background: var(--color-bg-warm);
    border-radius: var(--radius-md);
}

.example-japanese {
    font-size: 1.5rem;
    margin-bottom: var(--space-sm);
}

.example-meaning {
    font-size: 0.9375rem;
    color: var(--color-text-muted);
}

/* Grammar Context Card */
.grammar-contextual {
    border-left: 4px solid var(--color-ochre);
}

.grammar-card-content {
    text-align: center;
}

.grammar-title {
    font-size: 1.25rem;
    margin-bottom: var(--space-md);
}

.grammar-context {
    font-size: 0.9375rem;
    color: var(--color-text-secondary);
    margin-bottom: var(--space-lg);
}

.context-word {
    color: var(--color-primary);
    font-weight: 600;
}

.grammar-pattern-display {
    padding: var(--space-md);
    background: var(--color-bg-warm);
    border-radius: var(--radius-md);
    display: inline-block;
}

.pattern-name {
    font-family: var(--font-japanese);
    font-size: 1.25rem;
    color: var(--color-primary);
}

/* ===========================================
   Radical Library
   =========================================== */

.radical-library {
    padding: var(--space-lg);
    max-width: 900px;
    margin: 0 auto;
}

.radical-library-header {
    text-align: center;
    margin-bottom: var(--space-xl);
}

.radical-library-header h2 {
    margin-bottom: var(--space-sm);
}

.radical-library-subtitle {
    color: var(--color-text-secondary);
}

.radical-library-filters {
    margin-bottom: var(--space-xl);
}

.radical-search {
    width: 100%;
    padding: var(--space-md);
    border: 2px solid var(--color-sand);
    border-radius: var(--radius-md);
    font-size: 1rem;
    margin-bottom: var(--space-md);
    transition: border-color var(--transition-fast);
}

.radical-search:focus {
    outline: none;
    border-color: var(--color-primary);
}

.radical-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(100px, 1fr));
    gap: var(--space-md);
}

.radical-card {
    position: relative;
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: var(--space-md);
    background: var(--color-bg-card);
    border: 2px solid var(--color-sand);
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.radical-card:hover {
    border-color: var(--color-primary);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.radical-card.priority {
    border-color: var(--color-primary-light);
}

.radical-card.learning {
    border-color: var(--color-ochre);
    background: rgba(249, 115, 22, 0.05);
}

.radical-card.known {
    border-color: var(--color-success);
    background: var(--color-success-light);
}

.radical-card-char {
    font-size: 2rem;
    margin-bottom: var(--space-xs);
}

.radical-card-meaning {
    font-size: 0.75rem;
    font-weight: 500;
    text-align: center;
    margin-bottom: var(--space-xs);
}

.radical-card-strokes {
    font-size: 0.625rem;
    color: var(--color-text-muted);
}

.priority-badge {
    position: absolute;
    top: var(--space-xs);
    right: var(--space-xs);
    font-size: 0.5rem;
    font-weight: 600;
    color: var(--color-primary);
    background: rgba(26, 127, 100, 0.1);
    padding: 2px 6px;
    border-radius: var(--radius-full);
}

.status-badge {
    position: absolute;
    top: var(--space-xs);
    left: var(--space-xs);
    font-size: 0.75rem;
}

.session-stats {
    color: var(--color-text-muted);
    font-size: 0.875rem;
}

/* Responsive adjustments */
@media (max-width: 768px) {
    .stage-progress-row {
        flex-wrap: wrap;
    }

    .stage-indicator {
        min-width: 80px;
    }

    .resource-dropdown-menu {
        right: auto;
        left: 0;
    }

    .achievements-grid {
        grid-template-columns: repeat(3, 1fr);
    }

    .vocab-stats-grid,
    .radical-stats-grid,
    .study-stats-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 480px) {
    .stage-connector-line {
        display: none;
    }

    .achievements-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

/* ================================================
   HEISIG KANJI STUDY STYLES
   ================================================ */

.heisig-study-section {
    padding: var(--space-lg) 0;
}

.heisig-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: var(--space-xl);
    padding-bottom: var(--space-lg);
    border-bottom: 1px solid var(--color-sand);
}

.heisig-title h2 {
    font-size: 1.5rem;
    margin-bottom: var(--space-xs);
}

.heisig-subtitle {
    color: var(--color-text-muted);
    font-size: 0.875rem;
}

.heisig-stats {
    display: flex;
    gap: var(--space-lg);
}

.heisig-stats .stat-item {
    text-align: center;
}

.heisig-stats .stat-number {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--color-primary);
    display: block;
}

.heisig-stats .stat-label {
    font-size: 0.75rem;
    color: var(--color-text-muted);
}

/* Heisig tabs */
.heisig-tabs {
    display: flex;
    gap: var(--space-sm);
    margin-bottom: var(--space-xl);
    border-bottom: 1px solid var(--color-sand);
    padding-bottom: var(--space-md);
}

.heisig-tab {
    padding: var(--space-sm) var(--space-lg);
    background: none;
    border: none;
    font-size: 0.9375rem;
    color: var(--color-text-muted);
    cursor: pointer;
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
}

.heisig-tab:hover {
    background: var(--color-sand);
    color: var(--color-text);
}

.heisig-tab.active {
    background: var(--color-primary);
    color: white;
}

/* Heisig study card */
.heisig-study-card {
    background: var(--color-bg-card);
    border-radius: var(--radius-lg);
    padding: var(--space-xl);
    box-shadow: var(--shadow-md);
    max-width: 600px;
    margin: 0 auto;
}

.heisig-progress-bar {
    margin-bottom: var(--space-xl);
}

.heisig-progress-info {
    display: flex;
    justify-content: space-between;
    font-size: 0.75rem;
    color: var(--color-text-muted);
    margin-bottom: var(--space-xs);
}

/* Kanji display */
.heisig-kanji-display {
    text-align: center;
    padding: var(--space-xl) 0;
    position: relative;
}

.heisig-kanji-large {
    font-size: 8rem;
    line-height: 1;
    cursor: pointer;
    transition: transform var(--transition-fast);
}

.heisig-kanji-large:hover {
    transform: scale(1.05);
}

.learned-indicator {
    position: absolute;
    top: 0;
    right: var(--space-xl);
    background: var(--color-success-light);
    color: var(--color-success);
    padding: var(--space-xs) var(--space-sm);
    border-radius: var(--radius-full);
    font-size: 0.75rem;
    font-weight: 600;
}

/* Keyword */
.heisig-keyword {
    text-align: center;
    margin-bottom: var(--space-xl);
}

.heisig-keyword h2 {
    font-size: 1.75rem;
    font-weight: 600;
    letter-spacing: 0.1em;
    color: var(--color-text);
}

.heisig-frame-number {
    color: var(--color-text-muted);
    font-size: 0.875rem;
    margin-top: var(--space-xs);
}

/* Reveal button */
.heisig-reveal-btn {
    width: 100%;
    padding: var(--space-lg);
    font-size: 1rem;
}

/* Answer section */
.heisig-answer-section {
    animation: fadeIn 0.3s ease;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

/* Components breakdown */
.heisig-components {
    background: var(--color-bg-warm);
    padding: var(--space-lg);
    border-radius: var(--radius-md);
    margin-bottom: var(--space-lg);
}

.heisig-components h4 {
    font-size: 0.875rem;
    color: var(--color-text-muted);
    margin-bottom: var(--space-md);
}

.components-breakdown {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-md);
    flex-wrap: wrap;
}

.breakdown-kanji {
    font-size: 2.5rem;
}

.breakdown-equals {
    font-size: 1.5rem;
    color: var(--color-text-muted);
}

.breakdown-parts {
    display: flex;
    align-items: center;
    gap: var(--space-xs);
    font-size: 1rem;
    color: var(--color-text-secondary);
}

.breakdown-part {
    background: white;
    padding: var(--space-xs) var(--space-sm);
    border-radius: var(--radius-sm);
    border: 1px solid var(--color-sand);
}

/* Heisig story */
.heisig-story {
    margin-bottom: var(--space-lg);
    padding: var(--space-lg);
    background: linear-gradient(135deg, var(--color-success-light), white);
    border-radius: var(--radius-md);
    border-left: 4px solid var(--color-primary);
}

.heisig-story h4 {
    font-size: 0.875rem;
    color: var(--color-primary);
    margin-bottom: var(--space-sm);
}

.heisig-story p {
    font-size: 1rem;
    line-height: 1.7;
    color: var(--color-text-secondary);
}

/* Primitive info */
.heisig-primitive {
    background: #FFF9E6;
    padding: var(--space-md);
    border-radius: var(--radius-md);
    margin-bottom: var(--space-lg);
    border: 1px solid #F59E0B30;
}

.heisig-primitive h4 {
    font-size: 0.75rem;
    color: var(--color-ochre);
    margin-bottom: var(--space-xs);
}

.heisig-primitive p {
    font-size: 0.9375rem;
}

/* Personal mnemonic */
.heisig-personal-mnemonic {
    margin-bottom: var(--space-lg);
}

.heisig-personal-mnemonic h4 {
    font-size: 0.875rem;
    color: var(--color-text-muted);
    margin-bottom: var(--space-sm);
}

.mnemonic-display {
    background: var(--color-bg);
    padding: var(--space-md);
    border-radius: var(--radius-md);
    border: 1px dashed var(--color-sand-dark);
    cursor: pointer;
    min-height: 60px;
    transition: all var(--transition-fast);
}

.mnemonic-display:hover {
    border-color: var(--color-primary);
    background: var(--color-bg-warm);
}

.mnemonic-placeholder {
    color: var(--color-text-muted);
    font-style: italic;
}

.mnemonic-edit textarea {
    width: 100%;
    padding: var(--space-md);
    border: 1px solid var(--color-primary);
    border-radius: var(--radius-md);
    font-family: var(--font-sans);
    font-size: 0.9375rem;
    resize: vertical;
    background: white;
}

.mnemonic-actions {
    display: flex;
    gap: var(--space-sm);
    margin-top: var(--space-sm);
}

/* Stroke info */
.heisig-strokes {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--space-md);
    background: var(--color-bg);
    border-radius: var(--radius-md);
    margin-bottom: var(--space-xl);
}

.stroke-count {
    font-weight: 600;
    color: var(--color-text);
}

.stroke-order-hint {
    font-size: 0.75rem;
    color: var(--color-text-muted);
}

/* Actions */
.heisig-actions {
    margin-bottom: var(--space-lg);
}

.heisig-actions .btn {
    width: 100%;
    padding: var(--space-lg);
    font-size: 1rem;
}

/* Navigation */
.heisig-navigation {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: var(--space-md);
    padding-top: var(--space-lg);
    border-top: 1px solid var(--color-sand);
}

.heisig-frame-input {
    width: 80px;
    text-align: center;
    padding: var(--space-sm);
    border: 1px solid var(--color-sand-dark);
    border-radius: var(--radius-sm);
    font-size: 1rem;
}

/* List view */
.heisig-list-view {
    max-height: 70vh;
    overflow-y: auto;
}

.heisig-lesson-section {
    margin-bottom: var(--space-xl);
}

.heisig-lesson-section h3 {
    margin-bottom: var(--space-md);
    color: var(--color-text-muted);
    font-size: 0.875rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.heisig-kanji-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(100px, 1fr));
    gap: var(--space-sm);
}

.heisig-grid-item {
    background: var(--color-bg-card);
    border: 1px solid var(--color-sand);
    border-radius: var(--radius-md);
    padding: var(--space-md);
    text-align: center;
    cursor: pointer;
    transition: all var(--transition-fast);
    position: relative;
}

.heisig-grid-item:hover {
    border-color: var(--color-primary);
    transform: translateY(-2px);
    box-shadow: var(--shadow-sm);
}

.heisig-grid-item.learned {
    background: var(--color-success-light);
    border-color: var(--color-success);
}

.grid-kanji {
    font-size: 2rem;
    display: block;
    margin-bottom: var(--space-xs);
}

.grid-keyword {
    font-size: 0.6875rem;
    color: var(--color-text-secondary);
    display: block;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.grid-frame {
    font-size: 0.625rem;
    color: var(--color-text-muted);
}

.grid-check {
    position: absolute;
    top: var(--space-xs);
    right: var(--space-xs);
    color: var(--color-success);
    font-size: 0.75rem;
}

/* Learning path note */
.heisig-learning-path-note {
    margin-top: var(--space-2xl);
    padding: var(--space-lg);
    background: var(--color-bg-warm);
    border-radius: var(--radius-lg);
}

.path-note-content h4 {
    font-size: 0.875rem;
    color: var(--color-text-muted);
    margin-bottom: var(--space-md);
}

.path-stages {
    display: flex;
    align-items: center;
    gap: var(--space-md);
    flex-wrap: wrap;
}

.path-stage {
    display: flex;
    align-items: center;
    gap: var(--space-xs);
    padding: var(--space-sm) var(--space-md);
    background: white;
    border-radius: var(--radius-full);
    font-size: 0.8125rem;
    border: 1px solid var(--color-sand);
}

.path-stage.completed {
    background: var(--color-success-light);
    border-color: var(--color-success);
    color: var(--color-success);
}

.path-stage.active {
    background: var(--color-primary);
    border-color: var(--color-primary);
    color: white;
}

.path-arrow {
    color: var(--color-text-muted);
}

.heisig-empty {
    text-align: center;
    padding: var(--space-2xl);
    color: var(--color-text-muted);
}

/* Heisig example in radical cards */
.heisig-example-card {
    background: var(--color-bg-warm);
    border-radius: var(--radius-md);
    padding: var(--space-md);
    margin-top: var(--space-sm);
}

.heisig-example-card .example-main {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    margin-bottom: var(--space-sm);
}

.heisig-example-card .example-kanji {
    font-size: 1.5rem;
}

.heisig-example-card .example-keyword {
    font-weight: 500;
}

.heisig-example-card .example-breakdown {
    font-size: 0.8125rem;
    color: var(--color-text-secondary);
    margin-bottom: var(--space-xs);
}

.heisig-example-card .breakdown-label {
    font-weight: 500;
    margin-right: var(--space-xs);
}

.heisig-example-card .example-story {
    font-size: 0.8125rem;
    color: var(--color-text-muted);
    font-style: italic;
}

/* Responsive */
@media (max-width: 600px) {
    .heisig-header {
        flex-direction: column;
        gap: var(--space-md);
    }

    .heisig-kanji-large {
        font-size: 6rem;
    }

    .heisig-kanji-grid {
        grid-template-columns: repeat(auto-fill, minmax(80px, 1fr));
    }

    .path-stages {
        flex-direction: column;
        align-items: flex-start;
    }

    .path-arrow {
        display: none;
    }
}

/* ================================================
   RADICAL DETAILED EXAMPLE CARDS
   Required format: word (reading) - meaning
   Breakdown: kanji = components
   Story: "..."
   ================================================ */

.examples-detailed-list {
    display: flex;
    flex-direction: column;
    gap: var(--space-md);
}

.example-detailed-card {
    background: var(--color-bg-warm);
    border-radius: var(--radius-md);
    padding: var(--space-md);
    border-left: 3px solid var(--color-primary);
}

.example-detailed-card.featured {
    background: linear-gradient(135deg, var(--color-success-light), white);
    border-left: 4px solid var(--color-success);
}

.example-header {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    margin-bottom: var(--space-sm);
}

.example-kanji-large {
    font-size: 2rem;
    color: var(--color-text);
}

.example-keyword {
    font-weight: 600;
    color: var(--color-primary);
    text-transform: uppercase;
    font-size: 0.875rem;
    letter-spacing: 0.05em;
}

.example-vocab-line {
    display: flex;
    align-items: baseline;
    gap: var(--space-xs);
    padding: var(--space-sm);
    background: white;
    border-radius: var(--radius-sm);
    margin-bottom: var(--space-sm);
    font-size: 0.9375rem;
}

.example-vocab-line .reading {
    color: var(--color-text-muted);
    font-size: 0.8125rem;
}

.example-vocab-line .meaning {
    color: var(--color-text-secondary);
}

.example-breakdown-line {
    display: flex;
    align-items: center;
    gap: var(--space-xs);
    padding: var(--space-xs) 0;
    font-size: 0.875rem;
    flex-wrap: wrap;
}

.example-breakdown-line .breakdown-label {
    font-weight: 600;
    color: var(--color-text-secondary);
}

.example-breakdown-line .breakdown-formula {
    font-size: 1.25rem;
}

.example-breakdown-line .breakdown-equals {
    color: var(--color-text-muted);
    margin: 0 var(--space-xs);
}

.example-breakdown-line .breakdown-components {
    background: white;
    padding: 2px var(--space-sm);
    border-radius: var(--radius-sm);
    border: 1px solid var(--color-sand);
    color: var(--color-text-secondary);
}

.example-story-line {
    margin-top: var(--space-sm);
    padding-top: var(--space-sm);
    border-top: 1px dashed var(--color-sand);
    font-size: 0.8125rem;
}

.example-story-line .story-label {
    font-weight: 600;
    color: var(--color-primary);
    margin-right: var(--space-xs);
}

.example-story-line .story-text {
    color: var(--color-text-muted);
    font-style: italic;
}

.more-examples {
    text-align: center;
    color: var(--color-text-muted);
    font-size: 0.8125rem;
    margin-top: var(--space-md);
    padding-top: var(--space-sm);
    border-top: 1px solid var(--color-sand);
}

/* ================================================
   KANA QUIZ STYLES
   ================================================ */

.kana-quiz-start,
.kana-quiz-results {
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 60vh;
    padding: var(--space-lg);
}

.quiz-start-card,
.quiz-results-card {
    background: var(--color-bg-card);
    border-radius: var(--radius-lg);
    padding: var(--space-2xl);
    max-width: 500px;
    width: 100%;
    text-align: center;
    box-shadow: var(--shadow-lg);
}

.quiz-start-card h2,
.quiz-results-card h2 {
    margin-bottom: var(--space-sm);
}

.quiz-start-card > p {
    color: var(--color-text-muted);
    margin-bottom: var(--space-xl);
}

.quiz-type-selection {
    margin-bottom: var(--space-xl);
}

.quiz-type-selection h4 {
    font-size: 0.875rem;
    color: var(--color-text-muted);
    margin-bottom: var(--space-md);
}

.quiz-type-buttons {
    display: flex;
    gap: var(--space-sm);
    justify-content: center;
}

.quiz-type-btn {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-xs);
    padding: var(--space-md) var(--space-lg);
    background: var(--color-bg);
    border: 2px solid var(--color-sand);
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.quiz-type-btn:hover {
    border-color: var(--color-primary);
}

.quiz-type-btn.active {
    background: var(--color-success-light);
    border-color: var(--color-primary);
}

.quiz-type-btn .japanese {
    font-size: 1.25rem;
}

.quiz-type-progress {
    font-size: 0.75rem;
    color: var(--color-text-muted);
    margin-top: var(--space-xs);
}

.quiz-type-btn.active .quiz-type-progress {
    color: var(--color-success);
    font-weight: 500;
}

.session-summary {
    background: var(--color-bg);
    padding: var(--space-md);
    border-radius: var(--radius-sm);
    margin-bottom: var(--space-md);
    font-size: 0.875rem;
    color: var(--color-text-secondary);
}

.quiz-info {
    background: var(--color-bg);
    padding: var(--space-md);
    border-radius: var(--radius-md);
    margin-bottom: var(--space-xl);
}

.quiz-info p {
    color: var(--color-text-muted);
    font-size: 0.875rem;
    margin: var(--space-xs) 0;
}

.quiz-start-actions {
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
}

/* Quiz question screen */
.kana-quiz {
    max-width: 600px;
    margin: 0 auto;
    padding: var(--space-lg);
}

.quiz-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--space-xl);
    gap: var(--space-md);
}

.quiz-progress {
    flex: 1;
    text-align: center;
}

.quiz-progress span {
    font-size: 0.875rem;
    color: var(--color-text-muted);
}

.quiz-progress-bar {
    height: 4px;
    background: var(--color-sand);
    border-radius: var(--radius-full);
    margin-top: var(--space-xs);
}

.quiz-progress-fill {
    height: 100%;
    background: var(--color-primary);
    border-radius: var(--radius-full);
    transition: width 0.3s ease;
}

.quiz-score {
    font-weight: 600;
    color: var(--color-primary);
}

.quiz-card {
    background: var(--color-bg-card);
    border-radius: var(--radius-lg);
    padding: var(--space-2xl);
    box-shadow: var(--shadow-md);
    text-align: center;
}

.quiz-question {
    margin-bottom: var(--space-2xl);
}

.quiz-kana {
    font-size: 8rem;
    line-height: 1;
    cursor: pointer;
    display: block;
    margin-bottom: var(--space-md);
    transition: transform var(--transition-fast);
}

.quiz-kana:hover {
    transform: scale(1.05);
}

.quiz-options {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-md);
    margin-bottom: var(--space-xl);
}

.quiz-option {
    position: relative;
    padding: var(--space-lg);
    font-size: 1.25rem;
    background: var(--color-bg);
    border: 2px solid var(--color-sand);
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition-fast);
}

/* Number label for keyboard shortcut */
.option-number {
    position: absolute;
    top: 4px;
    right: 8px;
    font-size: 0.625rem;
    font-weight: 500;
    color: var(--color-text-muted);
    opacity: 0.6;
}

.quiz-option:hover:not(:disabled) {
    border-color: var(--color-primary);
    background: var(--color-bg-warm);
}

.quiz-option.correct {
    background: var(--color-success-light);
    border-color: var(--color-success);
    color: var(--color-success);
}

.quiz-option.incorrect {
    background: var(--color-error-light);
    border-color: var(--color-error);
    color: var(--color-error);
}

.quiz-option:disabled {
    cursor: default;
}

.quiz-feedback {
    padding-top: var(--space-lg);
    border-top: 1px solid var(--color-sand);
}

.feedback-correct {
    display: block;
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--color-success);
    margin-bottom: var(--space-md);
}

.feedback-incorrect {
    display: block;
    font-size: 1rem;
    color: var(--color-error);
    margin-bottom: var(--space-md);
}

/* Keyboard hints */
.quiz-keyboard-hints {
    display: flex;
    justify-content: center;
    gap: var(--space-lg);
    margin-top: var(--space-lg);
    padding-top: var(--space-md);
    border-top: 1px solid var(--color-sand);
}

.quiz-keyboard-hints span {
    font-size: 0.6875rem;
    color: var(--color-text-muted);
    opacity: 0.7;
}

/* Quiz card wrapper for arrows */
.kana-quiz .quiz-card-wrapper {
    display: flex;
    align-items: center;
    gap: var(--space-lg);
    width: 100%;
    max-width: 600px;
    margin: 0 auto;
}

.kana-quiz .quiz-card {
    flex: 1;
}

/* Results screen */
.result-icon {
    font-size: 4rem;
    margin-bottom: var(--space-md);
}

.result-icon.passed {
    animation: bounce 0.5s ease;
}

@keyframes bounce {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-10px); }
}

.result-score {
    background: var(--color-bg);
    padding: var(--space-lg);
    border-radius: var(--radius-md);
    margin: var(--space-lg) 0;
}

.score-number {
    display: block;
    font-size: 3rem;
    font-weight: 700;
    color: var(--color-primary);
}

.score-label {
    color: var(--color-text-muted);
    font-size: 0.875rem;
}

.result-message {
    margin-bottom: var(--space-lg);
    color: var(--color-text-secondary);
}

.result-message.success {
    color: var(--color-success);
    font-weight: 500;
}

.wrong-answers-review {
    background: var(--color-bg);
    padding: var(--space-lg);
    border-radius: var(--radius-md);
    margin-bottom: var(--space-xl);
    text-align: left;
}

.wrong-answers-review h4 {
    font-size: 0.875rem;
    color: var(--color-text-muted);
    margin-bottom: var(--space-md);
}

.wrong-answers-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(80px, 1fr));
    gap: var(--space-sm);
}

.wrong-answer-item {
    background: white;
    padding: var(--space-sm);
    border-radius: var(--radius-sm);
    text-align: center;
    cursor: pointer;
    border: 1px solid var(--color-sand);
}

.wrong-answer-item:hover {
    border-color: var(--color-primary);
}

.wa-kana {
    display: block;
    font-size: 1.5rem;
    margin-bottom: var(--space-xs);
}

.wa-correct {
    font-size: 0.75rem;
    color: var(--color-text-muted);
}

.result-actions {
    display: flex;
    gap: var(--space-md);
    justify-content: center;
}

/* Responsive */
@media (max-width: 480px) {
    .quiz-kana {
        font-size: 5rem;
    }

    .quiz-options {
        grid-template-columns: 1fr;
    }

    .quiz-type-buttons {
        flex-direction: column;
    }
}