/**
 * Etymology Visualizer Stylesheet
 * Diachronica Design System
 *
 * Author: Luke Steuber
 */

/* Etymology-specific custom properties */
:root {
    --content-max-width: 1100px;
    --gold: #B8860B;
    --success: #2E7D32;
    --error: #C62828;
    --highlight-bg: rgba(255, 235, 59, 0.4);
    --accent-faint: rgba(139, 90, 43, 0.08);
}

/* Base reset, body, typography, and .container handled by design-system.css */

body {
    min-height: 100vh;
}

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

/* Navigation handled by shared nav.css — no overrides here */

/* Main Content */
main {
    padding: var(--space-12) 0;
}

/* Cards */
.card {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
}

.card-padded {
    padding: var(--space-8);
}

/* Form Elements */
label {
    display: block;
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--color-text-secondary);
    margin-bottom: 8px;
}

input, select {
    width: 100%;
    padding: var(--space-3) var(--space-4);
    font-size: 1rem;
    font-family: inherit;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    background: var(--color-surface);
    color: var(--color-text);
    transition: all var(--duration-fast);
}

input:focus, select:focus {
    outline: none;
    border-color: var(--color-accent);
    box-shadow: 0 0 0 3px var(--accent-faint);
}

input::placeholder {
    color: var(--color-text-secondary);
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-2);
    padding: var(--space-3) var(--space-6);
    font-size: 1rem;
    font-weight: 500;
    font-family: inherit;
    border: none;
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: all var(--duration-fast);
    text-decoration: none;
}

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

.btn-primary:hover {
    background: var(--color-primary);
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

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

.btn-secondary:hover {
    background: var(--color-border);
}

.btn-ghost {
    background: transparent;
    color: var(--color-text-secondary);
    padding: var(--space-2) var(--space-3);
}

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

/* Quick Examples */
.examples {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-2);
    margin-top: var(--space-4);
}

.example-btn {
    padding: var(--space-1.5, 0.375rem) var(--space-3, 0.75rem);
    font-size: 0.85rem;
    background: var(--color-surface-sunken);
    color: var(--color-text-secondary);
    border: 1px solid transparent;
    border-radius: var(--radius-full);
    cursor: pointer;
    transition: all var(--duration-fast);
    font-family: var(--font-serif);
    font-style: italic;
}

.example-btn:hover {
    background: var(--color-surface);
    border-color: var(--color-accent);
    color: var(--color-accent);
}

/* Loading */
.loading {
    display: none;
    text-align: center;
    padding: var(--space-12);
}

.loading.active {
    display: block;
}

.spinner {
    width: var(--space-8);
    height: var(--space-8);
    border: 3px solid var(--color-border);
    border-top-color: var(--color-accent);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
    margin: 0 auto var(--space-4);
}

/* @keyframes spin — defined in design-system.css */

.loading-text {
    color: var(--color-text-secondary);
    font-size: 0.95rem;
}

/* Error */
.error-message {
    display: none;
    padding: var(--space-3) var(--space-4);
    background: var(--color-error-bg, #FEF2F2);
    border: 1px solid #FECACA;
    border-radius: var(--radius-sm);
    color: var(--error);
    font-size: 0.9rem;
    margin-top: var(--space-4);
}

.error-message.show {
    display: block;
}

/* Results */
.results {
    display: none;
}

.results.show {
    display: block;
}

.word-header {
    text-align: center;
    padding: 32px 0;
    border-bottom: 1px solid var(--color-border);
    margin-bottom: 32px;
}

.word-title {
    font-size: 2.5rem;  /* Large page heading, but not hero size */
    font-family: var(--font-serif);
    font-weight: 600;
    color: var(--color-primary);
    margin-bottom: var(--space-2);
}

/* Prominent pronunciation with audio playback */
.pronunciation-hero {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-4);
    margin: var(--space-4) 0;
    padding: var(--space-4);
    background: var(--color-surface-sunken);
    border-radius: var(--radius-lg);
}

.pronunciation-ipa {
    font-family: 'Charis SIL', 'Doulos SIL', 'Gentium Plus', 'DejaVu Sans', serif;
    font-size: 1.5rem;
    color: var(--color-text);
    font-style: normal;
    font-weight: 500;
    letter-spacing: 0.02em;
}

.pronunciation-play-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 48px;
    height: 48px;
    background: var(--color-accent);
    color: #ffffff;
    border: none;
    border-radius: 50%;
    cursor: pointer;
    transition: all var(--duration-normal) var(--ease-in-out);
    box-shadow: var(--shadow-sm);
}

.pronunciation-play-btn:hover {
    background: var(--color-primary);
    box-shadow: var(--shadow-md);
    transform: scale(1.05);
}

.pronunciation-play-btn:active,
.pronunciation-play-btn.playing {
    transform: scale(0.95);
}

.pronunciation-play-btn i {
    font-size: 1.25rem;
}

.pronunciation-play-btn:focus-visible {
    outline: 2px solid var(--color-accent);
    outline-offset: 2px;
}

.word-meta {
    display: flex;
    justify-content: center;
    gap: 24px;
    color: var(--color-text-secondary);
    font-size: 0.9rem;
}

.word-meta span {
    display: flex;
    align-items: center;
    gap: 6px;
}

.pos-badge {
    display: inline-block;
    padding: 4px 12px;
    background: var(--accent-faint);
    color: var(--color-accent);
    font-size: 0.8rem;
    font-weight: 500;
    border-radius: 20px;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

/* Definition Box */
.definition-box {
    background: var(--color-surface-sunken);
    border-radius: var(--radius-lg);
    padding: 24px 28px;
    margin-bottom: 32px;
}

.definition-box h3 {
    font-size: 0.8rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--color-text-secondary);
    margin-bottom: 8px;
    font-family: 'Inter', sans-serif;
    font-weight: 600;
}

.definition-text {
    font-family: var(--font-serif);
    font-size: 1.25rem;
    line-height: 1.7;
    color: var(--color-text);
}

/* Narrative Box */
.narrative-box {
    background: linear-gradient(135deg, rgba(184, 134, 11, 0.05), rgba(139, 90, 43, 0.05));
    border-left: 4px solid var(--gold);
    border-radius: var(--radius-lg);
    padding: 24px 28px;
    margin-bottom: 32px;
}

.narrative-box h3 {
    font-size: 0.8rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--gold);
    margin-bottom: 12px;
    font-family: 'Inter', sans-serif;
    font-weight: 600;
}

.narrative-text {
    font-family: var(--font-serif);
    font-size: 1.15rem;
    line-height: 1.8;
    color: var(--color-text);
    font-style: italic;
}

/* Etymology Section */
.etymology-section {
    margin-bottom: 40px;
}

.section-title {
    font-size: 0.8rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--color-text-secondary);
    margin-bottom: 16px;
    font-family: 'Inter', sans-serif;
    font-weight: 600;
}

.etymology-text {
    font-family: var(--font-serif);
    font-size: 1.1rem;
    line-height: 1.8;
    color: var(--color-text-secondary);
}

/* Etymology Chain */
.chain {
    display: flex;
    flex-direction: column;
    gap: 0;
    position: relative;
    padding-left: 24px;
    margin: 24px 0;
}

.chain::before {
    content: '';
    position: absolute;
    left: 7px;
    top: 24px;
    bottom: 24px;
    width: 2px;
    background: linear-gradient(to bottom, var(--color-accent), var(--gold));
}

.chain-item {
    display: flex;
    gap: 20px;
    position: relative;
}

.chain-dot {
    position: absolute;
    left: -24px;
    top: 20px;
    width: 16px;
    height: 16px;
    background: var(--color-surface);
    border: 3px solid var(--color-accent);
    border-radius: 50%;
    z-index: 1;
}

.chain-item:first-child .chain-dot {
    background: var(--color-accent);
}

.chain-content {
    flex: 1;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    padding: 16px 20px;
    margin-bottom: 16px;
}

.chain-word {
    font-family: var(--font-serif);
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--color-text);
}

.chain-language {
    font-size: 0.85rem;
    color: var(--color-accent);
    margin-left: 8px;
}

.chain-details {
    display: flex;
    gap: 16px;
    margin-top: 8px;
    font-size: 0.85rem;
    color: var(--color-text-secondary);
}

.chain-definition {
    margin-top: 8px;
    font-size: 0.9rem;
    color: var(--color-text-secondary);
    font-style: italic;
}

/* Visualization */
.viz-section {
    margin-top: 40px;
}

.viz-frame {
    width: 100%;
    height: 500px;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    background: var(--color-surface);
}

.map-message {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 24px;
    background: rgba(139, 69, 19, 0.05);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    color: var(--color-text-secondary);
    font-size: 0.9375rem;
    line-height: 1.6;
    margin-top: 16px;
}

.map-message i {
    font-size: 1.25rem;
    color: var(--color-accent);
    flex-shrink: 0;
}

/* Stats */
.stats-row {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
    gap: 16px;
    margin-top: 24px;
}

.stat-item {
    text-align: center;
    padding: 16px;
    background: var(--color-surface-sunken);
    border-radius: var(--radius-sm);
}

.stat-value {
    font-family: var(--font-serif);
    font-size: 1.75rem;
    font-weight: 600;
    color: var(--color-accent);
}

.stat-label {
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--color-text-secondary);
    margin-top: 4px;
}

/* Footer handled by design-system.css (.site-footer) */

/* Options toggle */
.options-toggle {
    display: flex;
    align-items: center;
    gap: 8px;
    color: var(--color-text-secondary);
    font-size: 0.85rem;
    cursor: pointer;
    margin-top: 16px;
    padding: 8px 0;
}

.options-toggle:hover {
    color: var(--color-text);
}

.options-panel {
    display: none;
    margin-top: 16px;
    padding-top: var(--space-4);
    border-top: 1px solid var(--color-surface-sunken);
}

.options-panel.show {
    display: block;
}

.options-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
}

/* Focus styles and .sr-only handled by design-system.css */

/* ========================================
   RESPONSIVE DESIGN - TABLETS
   ======================================== */
@media (max-width: 768px) {
    h1 { font-size: 1.75rem; }
    .word-title { font-size: 2.5rem; }
    .card-padded { padding: var(--space-6); }
    .options-grid { grid-template-columns: 1fr; }
    .word-meta { flex-direction: column; gap: 8px; }

    input, select {
        font-size: 16px; /* Prevent iOS auto-zoom */
    }

    .chain {
        padding-left: 16px;
    }

    .chain-dot {
        width: 12px;
        height: 12px;
    }

    .chain-word {
        font-size: 1.1rem;
    }

    .chain-language {
        font-size: 0.8rem;
    }
}

/* ========================================
   RESPONSIVE DESIGN - SMALL MOBILE
   ======================================== */
@media (max-width: 480px) {
    .container {
        padding: 0 var(--space-2);
    }

    h1 { font-size: 1.5rem; }
    .word-title { font-size: 2rem; }
    .card-padded { padding: var(--space-4); }

    .btn {
        width: 100%;
        padding: 16px 24px;
    }

    .stats-row {
        grid-template-columns: 1fr;
    }

    .stat-item {
        display: flex;
        justify-content: space-between;
        align-items: center;
        text-align: left;
    }

    .chain {
        padding-left: 12px;
    }

    .chain-dot {
        width: 10px;
        height: 10px;
    }

    .viz-frame {
        height: 400px;
    }
}

/* Reduced motion — handled by design-system.css */

/* ========================================
   UX REDESIGN COMPONENTS
   ======================================== */

/* Search Section */
.search-section {
    max-width: 900px;
    margin: 0 auto var(--space-16, 48px);
    padding: var(--space-8, 40px) var(--space-6, 32px);
    background: var(--color-surface);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
}

.search-intro {
    text-align: center;
    margin-bottom: var(--space-8, 40px);
}

.search-intro h2 {
    font-family: var(--font-serif);
    font-size: 2rem;
    color: var(--color-primary);
    margin-bottom: var(--space-2, 12px);
}

.search-intro p {
    font-size: 1.125rem;
    color: var(--color-text-secondary);
    max-width: 600px;
    margin: 0 auto;
}

/* Simple Search Form */
.simple-search-form {
    display: flex;
    gap: var(--space-2, 12px);
    margin-bottom: var(--space-4, 20px);
}

.simple-search-form input {
    flex: 1;
    padding: var(--space-4, 20px) var(--space-6, 32px);
    font-size: 1.125rem;
    border: 2px solid var(--color-border);
    border-radius: var(--radius-lg);
}

.simple-search-form button {
    padding: var(--space-4, 20px) var(--space-8, 40px);
    white-space: nowrap;
    border-radius: var(--radius-full, 50px);
}

/* Search Tips */
.search-tips {
    text-align: center;
    color: var(--color-text-secondary);
    font-size: 0.9rem;
    margin-bottom: var(--space-6, 32px);
}

.tip-word {
    color: var(--color-accent);
    cursor: pointer;
    font-family: var(--font-serif);
    font-style: italic;
    transition: all var(--duration-normal) var(--ease-in-out);
}

.tip-word:hover {
    color: var(--color-primary);
    text-decoration: underline;
}

/* Corpus Data Info Box */
.corpus-info-box {
    background: linear-gradient(135deg, rgba(59, 130, 246, 0.05), rgba(139, 92, 246, 0.05));
    border-left: 4px solid var(--color-accent);
    border-radius: var(--radius-lg);
    padding: var(--space-6, 32px);
    margin-top: var(--space-6, 32px);
    text-align: center;
}

.corpus-info-box h3 {
    font-size: 1.125rem;
    font-family: var(--font-serif);
    color: var(--color-primary);
    margin-bottom: var(--space-2, 12px);
}

.corpus-info-box p {
    font-size: 0.95rem;
    line-height: 1.6;
    color: var(--color-text);
    margin-bottom: var(--space-4, 20px);
    max-width: 700px;
    margin-left: auto;
    margin-right: auto;
}

.corpus-info-box strong {
    color: var(--color-accent);
    font-weight: 600;
}

.corpus-learn-more {
    display: inline-block;
    color: var(--color-accent);
    text-decoration: none;
    font-weight: 500;
    font-size: 0.9rem;
    padding: var(--space-1, 8px) var(--space-4, 20px);
    border: 1px solid var(--color-accent);
    border-radius: var(--radius-sm);
    transition: all var(--duration-normal) var(--ease-in-out);
}

.corpus-learn-more:hover {
    background: var(--color-accent);
    color: white;
    transform: translateY(-1px);
    box-shadow: 0 2px 8px rgba(59, 130, 246, 0.2);
}

/* Info Panel */
.info-panel-toggle {
    display: flex;
    align-items: center;
    gap: var(--space-1, 8px);
    padding: var(--space-2, 12px) var(--space-4, 20px);
    background: var(--color-surface-sunken);
    border-radius: var(--radius-sm);
    cursor: pointer;
    margin-bottom: var(--space-2, 12px);
    transition: all var(--duration-normal) var(--ease-in-out);
    color: var(--color-text-secondary);
    font-size: 0.9rem;
}

.info-panel-toggle:hover {
    background: var(--color-border);
    color: var(--color-text);
}

.info-panel-toggle i.bi-chevron-down,
.info-panel-toggle i.bi-chevron-up {
    margin-left: auto;
}

.info-panel {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease, padding 0.3s ease;
    background: var(--color-surface-sunken);
    border-radius: var(--radius-sm);
    margin-bottom: var(--space-8, 40px);
    padding: 0 var(--space-4, 20px);
}

.info-panel.show {
    max-height: 300px;
    padding: var(--space-4, 20px);
}

.info-panel p {
    margin: 0;
    line-height: 1.6;
    color: var(--color-text-secondary);
}

/* Visualization Type Section */
.viz-type-section {
    margin-bottom: var(--space-8, 40px);
}

.viz-type-section h3 {
    font-size: 1.125rem;
    margin-bottom: var(--space-4, 20px);
    color: var(--color-text);
    font-family: var(--font-serif);
}

.viz-type-options {
    display: flex;
    flex-direction: column;
    gap: var(--space-2, 12px);
}

.viz-type-option {
    display: flex;
    align-items: flex-start;
    gap: var(--space-2, 12px);
    padding: var(--space-4, 20px);
    background: var(--color-background);
    border: 2px solid var(--color-border);
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--duration-normal) var(--ease-in-out);
}

.viz-type-option:hover {
    border-color: var(--color-accent);
    background: var(--color-surface-sunken);
}

.viz-type-option input[type="radio"] {
    margin-top: 2px;
    cursor: pointer;
}

.viz-type-option input[type="radio"]:checked ~ .option-content strong {
    color: var(--color-accent);
}

.viz-type-option:has(input[type="radio"]:checked) {
    border-color: var(--color-accent);
    background: var(--accent-faint);
}

.option-content {
    display: flex;
    flex-direction: column;
    gap: 4px;
    flex: 1;
}

.option-content strong {
    font-size: 1rem;
    color: var(--color-text);
    font-family: var(--font-serif);
}

.option-content span {
    font-size: 0.875rem;
    color: var(--color-text-secondary);
}

/* Advanced Options */
.advanced-toggle {
    display: flex;
    align-items: center;
    gap: var(--space-1, 8px);
    padding: var(--space-2, 12px) var(--space-4, 20px);
    background: transparent;
    border: 1px dashed var(--color-border);
    border-radius: var(--radius-sm);
    cursor: pointer;
    margin-bottom: var(--space-2, 12px);
    color: var(--color-text-secondary);
    transition: all var(--duration-normal) var(--ease-in-out);
    font-size: 0.9rem;
}

.advanced-toggle:hover {
    border-color: var(--color-accent);
    color: var(--color-accent);
}

.advanced-toggle i.bi-chevron-down,
.advanced-toggle i.bi-chevron-up {
    margin-left: auto;
}

.advanced-options {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease, padding 0.3s ease;
}

.advanced-options.show {
    max-height: 500px;
    padding: var(--space-4, 20px);
    background: var(--color-surface-sunken);
    border-radius: var(--radius-sm);
    margin-bottom: var(--space-4, 20px);
}

.advanced-options label:first-of-type {
    display: block;
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--color-text);
    margin-bottom: var(--space-2, 12px);
}

.relationship-options {
    display: flex;
    flex-direction: column;
    gap: var(--space-2, 12px);
    margin-top: var(--space-2, 12px);
}

.relationship-options label {
    display: flex;
    align-items: center;
    gap: var(--space-2, 12px);
    padding: var(--space-2, 12px);
    cursor: pointer;
    border-radius: var(--radius-sm);
    transition: background-color var(--duration-normal) var(--ease-in-out);
}

.relationship-options label:hover {
    background: var(--color-border);
}

.relationship-options input[type="radio"] {
    cursor: pointer;
}

.relationship-options span {
    font-size: 0.9rem;
    color: var(--color-text-secondary);
}

/* Visualization Hero Section */
.viz-section-hero {
    margin-bottom: var(--space-12, 56px);
    padding: var(--space-8, 40px);
    background: var(--color-surface);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
}

.viz-section-hero h3 {
    font-size: 1.5rem;
    margin-bottom: var(--space-2, 12px);
    text-align: center;
    font-family: var(--font-serif);
    color: var(--color-primary);
}

.viz-description {
    text-align: center;
    color: var(--color-text-secondary);
    margin-bottom: var(--space-6, 32px);
    font-size: 1.05rem;
}

.viz-section-hero .viz-frame {
    height: 500px;
}

/* Chevron rotation animation */
.bi-chevron-down,
.bi-chevron-up {
    transition: transform 0.3s ease;
}

/* Responsive overrides for new components */
@media (max-width: 768px) {
    .search-section {
        padding: var(--space-6, 32px) var(--space-4, 20px);
    }

    .simple-search-form {
        flex-direction: column;
    }

    .simple-search-form button {
        width: 100%;
    }

    .viz-type-options {
        gap: var(--space-1, 8px);
    }

    .viz-section-hero .viz-frame {
        height: 350px;
    }

    .search-intro h2 {
        font-size: 1.75rem;
    }
}

@media (max-width: 480px) {
    .search-section {
        padding: var(--space-4, 20px) var(--space-2, 12px);
    }

    .search-intro h2 {
        font-size: 1.5rem;
    }

    .search-intro p {
        font-size: 1rem;
    }

    .simple-search-form input {
        padding: var(--space-2, 12px) var(--space-4, 20px);
        font-size: 1rem;
    }

    .viz-section-hero {
        padding: var(--space-4, 20px);
    }

    .viz-section-hero .viz-frame {
        height: 250px;
    }

    .viz-section-hero h3 {
        font-size: 1.25rem;
    }

    /* Larger touch targets for mobile (44px minimum) */
    .progressive-toggle {
        min-height: 44px;
    }

    .matrix-tab {
        min-height: 44px;
        padding: var(--space-4, 16px);
    }

    .simple-search-form button {
        min-height: 44px;
    }

    .related-word-chip {
        min-height: 44px;
    }
}

/* ========================================
   NEW WORD STORY FEATURES
   ======================================== */

/* Hero Image */
.hero-image {
    margin: 32px 0;
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.1);
}

.hero-image img {
    width: 100%;
    max-height: 400px;
    object-fit: cover;
    display: block;
}

.hero-image-caption {
    font-size: 0.875rem;
    color: var(--color-text-secondary);
    padding: 12px 16px;
    background: var(--color-surface-sunken);
    text-align: center;
}

/* Language Family Lineage */
.language-lineage {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 8px;
    padding: 16px;
    background: var(--color-surface-sunken);
    border-radius: 8px;
    margin-bottom: 16px;
}

.lineage-item {
    font-size: 1rem;
    font-weight: 500;
    color: var(--color-text);
}

.explorer-link {
    display: inline-block;
    margin-top: 8px;
    color: var(--color-accent);
    text-decoration: none;
    font-weight: 500;
    transition: all 0.2s;
}

.explorer-link:hover {
    text-decoration: underline;
}

/* Meaning Evolution Timeline */
.section-description {
    color: var(--color-text-secondary);
    font-size: 0.9rem;
    margin-bottom: var(--space-4);
    text-align: center;
}

.meaning-evolution-timeline {
    display: flex;
    align-items: stretch;
    gap: var(--space-2);
    margin-bottom: var(--space-4);
    overflow-x: auto;
    padding: var(--space-4) 0;
    scroll-snap-type: x mandatory;
    -webkit-overflow-scrolling: touch;
}

.meaning-card {
    flex: 0 0 auto;
    min-width: 200px;
    max-width: 250px;
    background: var(--color-surface-sunken);
    border: 2px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: var(--space-4);
    transition: all var(--duration-normal) var(--ease-in-out);
    scroll-snap-align: start;
}

.meaning-card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.meaning-card-modern {
    background: linear-gradient(135deg, var(--color-surface-sunken) 0%, rgba(139, 69, 19, 0.05) 100%);
    border-color: var(--color-accent);
    border-width: 2px;
}

.meaning-period {
    font-size: 0.8125rem;
    font-weight: 600;
    color: var(--color-accent);
    margin-bottom: var(--space-1);
}

.meaning-word {
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--color-text);
    margin-bottom: var(--space-1);
    line-height: 1.3;
}

.meaning-language {
    font-size: 0.875rem;
    color: var(--color-text-secondary);
    margin-bottom: var(--space-2);
}

.meaning-definition {
    font-size: 0.8125rem;
    color: var(--color-text-secondary);
    line-height: 1.5;
    padding-top: var(--space-2);
    border-top: 1px solid var(--color-border);
}

.meaning-arrow {
    flex: 0 0 auto;
    display: flex;
    align-items: center;
    font-size: 1.5rem;
    color: var(--color-accent);
    font-weight: 600;
}

.meaning-insight {
    display: flex;
    align-items: flex-start;
    gap: var(--space-2);
    padding: var(--space-4);
    background: rgba(139, 69, 19, 0.05);
    border-left: 4px solid var(--color-accent);
    border-radius: var(--radius-md);
    margin-top: var(--space-4);
}

.meaning-insight i {
    flex: 0 0 auto;
    font-size: 1.25rem;
    color: var(--color-accent);
    margin-top: 2px;
}

.meaning-insight span {
    flex: 1;
    color: var(--color-text);
    font-size: 0.9rem;
    line-height: 1.6;
}

/* Related Words */
.related-words {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
}

.related-word-chip {
    display: inline-flex;
    flex-direction: column;
    align-items: flex-start;
    padding: 12px 16px;
    background: var(--color-surface-sunken);
    border: 1px solid var(--color-border);
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.2s;
    font-weight: 500;
}

.related-word-chip:hover {
    background: var(--color-accent);
    color: white;
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
}

.related-word-desc {
    font-size: 0.75rem;
    font-weight: normal;
    opacity: 0.75;
    margin-top: 4px;
}

/* Cognates Across Languages */
.cognates-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
    gap: var(--space-4);
}

.cognate-card {
    background: var(--color-surface-sunken);
    border: 2px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: var(--space-4);
    transition: all var(--duration-normal) var(--ease-in-out);
}

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

.cognate-word {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--color-text);
    margin-bottom: 8px;
}

.cognate-language {
    font-size: 0.875rem;
    color: var(--color-accent);
    font-weight: 500;
    margin-bottom: 8px;
    display: flex;
    align-items: center;
    gap: 6px;
}

.cognate-meaning {
    font-size: 0.8125rem;
    color: var(--color-text-secondary);
    line-height: 1.5;
    margin-bottom: 8px;
}

.cognate-family {
    font-size: 0.75rem;
    color: var(--color-text-secondary);
    opacity: 0.8;
    font-style: italic;
}

@media (max-width: 768px) {
    .cognates-grid {
        grid-template-columns: 1fr;
    }
}

/* Progressive Disclosure */
.progressive-section {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    margin-bottom: var(--space-6);
    overflow: hidden;
}

.progressive-toggle {
    width: 100%;
    display: flex;
    align-items: center;
    gap: var(--space-2);
    padding: var(--space-4) var(--space-6);
    background: transparent;
    border: none;
    cursor: pointer;
    font-family: var(--font-sans);
    font-size: 1rem;
    font-weight: 600;
    color: var(--color-text);
    transition: all var(--duration-normal) var(--ease-in-out);
}

.progressive-toggle:hover {
    background: var(--color-surface-sunken);
}

.progressive-toggle i {
    transition: transform var(--duration-normal) var(--ease-in-out);
}

.progressive-toggle.active i {
    transform: rotate(180deg);
}

.progressive-badge {
    margin-left: auto;
    padding: 4px 12px;
    background: var(--color-accent);
    color: #ffffff;
    border-radius: var(--radius-full);
    font-size: 0.75rem;
    font-weight: 600;
}

.progressive-content {
    padding: 0 var(--space-6) var(--space-6);
}

.progressive-description {
    color: var(--color-text-secondary);
    font-size: 0.9rem;
    margin-bottom: var(--space-4);
}

/* Matrix Tabs */
.matrix-tabs {
    display: flex;
    gap: var(--space-1);
    margin-bottom: var(--space-4);
    overflow-x: auto;
    border-bottom: 2px solid var(--color-border);
}

.matrix-tab {
    padding: var(--space-2) var(--space-4);
    background: transparent;
    border: none;
    border-bottom: 2px solid transparent;
    cursor: pointer;
    font-family: var(--font-sans);
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--color-text-secondary);
    transition: all var(--duration-fast) var(--ease-in-out);
    white-space: nowrap;
}

.matrix-tab:hover {
    color: var(--color-text);
    background: var(--color-surface-sunken);
}

.matrix-tab.active {
    color: var(--color-accent);
    border-bottom-color: var(--color-accent);
}

/* Matrix Heatmap */
.matrix-container {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-4);
    padding: var(--space-6);
    background: var(--color-surface-sunken);
    border-radius: var(--radius-md);
    margin-bottom: var(--space-4);
}

#matrixCanvas {
    max-width: 100%;
    height: auto;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
}

.matrix-legend {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    font-size: 0.875rem;
    color: var(--color-text-secondary);
}

.legend-gradient {
    width: 200px;
    height: 20px;
    background: linear-gradient(90deg, #ffffff 0%, #3b82f6 100%);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
}

.matrix-explanation {
    padding: var(--space-4);
    background: rgba(139, 69, 19, 0.05);
    border-left: 4px solid var(--color-accent);
    border-radius: var(--radius-md);
    color: var(--color-text);
    font-size: 0.9rem;
    line-height: 1.6;
}

/* Graph Insights */
.insights-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--space-4);
}

.insight-card {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: var(--space-6);
    background: var(--color-surface-sunken);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    text-align: center;
}

.insight-card i {
    font-size: 2rem;
    color: var(--color-accent);
    margin-bottom: var(--space-2);
}

.insight-value {
    font-size: 2rem;
    font-weight: 600;
    color: var(--color-text);
    margin-bottom: var(--space-1);
}

.insight-label {
    font-size: 0.875rem;
    color: var(--color-text-secondary);
    font-weight: 500;
}