/* ============================================
   Thai Alphabet Page Styles
   ============================================ */

.alphabet-page {
    max-width: 1200px;
    margin: 0 auto;
    padding-bottom: var(--spacing-16);
}

/* Page Header */
.page-header {
    text-align: center;
    margin-bottom: var(--spacing-6);
}
.page-header h1 {
    font-size: var(--font-size-3xl);
    margin-bottom: var(--spacing-2);
}
.page-header h1 .thai-text {
    color: var(--color-primary);
}

/* ============================================
   Tabs
   ============================================ */
.tabs-wrapper {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--spacing-4);
    margin-bottom: var(--spacing-6);
    border-bottom: 2px solid var(--color-gray-200);
}
.tabs {
    display: flex;
    gap: var(--spacing-2);
}
.tab {
    padding: var(--spacing-3) var(--spacing-6);
    background: none;
    border: none;
    font-size: var(--font-size-base);
    font-weight: 500;
    color: var(--color-gray-600);
    cursor: pointer;
    border-bottom: 2px solid transparent;
    margin-bottom: -2px;
    transition: all var(--transition-fast);
    white-space: nowrap;
}
.tab.active {
    color: var(--color-primary);
    border-bottom-color: var(--color-primary);
}
.tab:hover:not(.active) {
    color: var(--color-gray-800);
}
.btn-edit-alphabet {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-2);
    padding: var(--spacing-2) var(--spacing-4);
    font-size: var(--font-size-sm);
    font-weight: 500;
    color: var(--color-primary);
    border: 1px solid var(--color-gray-200);
    border-radius: var(--radius-md);
    text-decoration: none;
    background: var(--color-white);
    transition: all var(--transition-fast);
    white-space: nowrap;
}
.btn-edit-alphabet:hover {
    background: var(--color-gray-50);
    border-color: var(--color-primary);
    color: var(--color-primary-dark);
}
.tab-content {
    display: none;
    animation: fadeIn 0.3s ease-in-out;
}
.tab-content.active {
    display: block;
}
@keyframes fadeIn {
    from { opacity: 0; transform: translateY(5px); }
    to { opacity: 1; transform: translateY(0); }
}

/* ============================================
   Consonant Grid (compact 11-column)
   ============================================ */

.consonant-section {
    margin-bottom: var(--spacing-6);
}
.consonant-section:last-child {
    margin-bottom: 0;
}
.section-title {
    font-size: var(--font-size-lg);
    font-weight: 600;
    margin-bottom: var(--spacing-3);
    padding: var(--spacing-2) 0;
    display: inline-block;
    border-bottom: 2px solid transparent;
}
.section-title.legend-mid {
    color: #3D5A80;
    border-bottom-color: #A8BDD9;
}
.section-title.legend-high {
    color: #3D805A;
    border-bottom-color: #A8D9B8;
}
.section-title.legend-low {
    color: #805A3D;
    border-bottom-color: #D9B8A0;
}

.consonant-grid {
    display: grid;
    grid-template-columns: repeat(11, 1fr);
    gap: 10px;
    max-width: 100%;
}

.consonant-cell {
    aspect-ratio: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-lg);
    cursor: pointer;
    transition: all var(--transition-fast);
    padding: 4px;
    border: 2px solid transparent;
    background: var(--color-white);
    position: relative;
    box-shadow: 0 1px 2px rgba(0,0,0,0.04);
}
.consonant-cell .thai-char {
    font-size: 2.2rem;
    line-height: 1;
    font-family: 'Sarabun', sans-serif;
    color: var(--color-gray-900);
}
.consonant-cell .sound {
    font-size: 0.7rem;
    color: var(--color-primary);
    font-weight: 600;
    margin-top: 7px;
}

/* Class color-coding - muted harmonious palette */
.consonant-cell.class-mid {
    border-color: #A8BDD9;
    background: #E4EBF5;
}
.consonant-cell.class-high {
    border-color: #A8D9B8;
    background: #E4F5EA;
}
.consonant-cell.class-low {
    border-color: #D9B8A0;
    background: #F5EDE4;
}

/* Dim rare/obsolete consonants */
.consonant-cell.rare {
    opacity: 0.6;
    filter: saturate(0.5);
}
.consonant-cell.rare:hover {
    opacity: 1;
    filter: saturate(1);
}

.consonant-cell:hover {
    transform: scale(1.06);
    box-shadow: var(--shadow-md);
    z-index: 2;
}

/* Rare/obsolete consonant legend */
.rare-legend {
    font-size: var(--font-size-sm);
    color: var(--color-gray-500);
    margin-bottom: var(--spacing-4);
    display: flex;
    align-items: center;
    gap: var(--spacing-2);
}
.rare-legend i {
    color: var(--color-gray-400);
}

/* Details button on consonant cells */
.consonant-cell .btn-details {
    position: absolute;
    top: 4px;
    right: 4px;
    background: transparent;
    border: none;
    color: var(--color-gray-400);
    cursor: pointer;
    padding: 3px;
    border-radius: 50%;
    transition: all 0.2s;
    opacity: 0;
    font-size: 0.85rem;
    width: 22px;
    height: 22px;
    display: flex;
    align-items: center;
    justify-content: center;
}
.consonant-cell:hover .btn-details {
    opacity: 1;
}
.consonant-cell .btn-details:hover {
    background-color: rgba(0,0,0,0.08);
    color: var(--color-primary);
}

/* Mastery dot */
.mastery-dot {
    position: absolute;
    bottom: 2px;
    left: 2px;
    width: 6px;
    height: 6px;
    border-radius: var(--radius-full);
}
.mastery-dot.level-0 { background: var(--mastery-0); }
.mastery-dot.level-1 { background: var(--mastery-1); }
.mastery-dot.level-2 { background: var(--mastery-2); }
.mastery-dot.level-3 { background: var(--mastery-3); }
.mastery-dot.level-4 { background: var(--mastery-4); }
.mastery-dot.level-5 { background: var(--mastery-5); }
.mastery-dot.level-6 { background: var(--mastery-6); }
.mastery-dot.level-7 { background: var(--mastery-7); }

/* ============================================
   Vowels Tab
   ============================================ */
.vowel-sub-tabs {
    display: flex;
    gap: var(--spacing-2);
    margin-bottom: var(--spacing-5);
    flex-wrap: wrap;
}
.sub-tab {
    padding: var(--spacing-2) var(--spacing-4);
    background: var(--color-gray-100);
    border: none;
    border-radius: var(--radius-full);
    font-size: var(--font-size-sm);
    font-weight: 500;
    color: var(--color-gray-600);
    cursor: pointer;
    transition: all var(--transition-fast);
}
.sub-tab.active {
    background: var(--color-primary);
    color: white;
}
.sub-tab:hover:not(.active) {
    background: var(--color-gray-200);
}
.vowel-subtab-content {
    display: none;
    animation: fadeIn 0.3s ease-in-out;
}
.vowel-subtab-content.active {
    display: block;
}

/* Vowel symbols grid (individual marks) */
.vowel-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(90px, 1fr));
    gap: 8px;
}
.vowel-cell {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-3);
    border-radius: var(--radius-lg);
    cursor: pointer;
    transition: all var(--transition-fast);
    border: 1px solid var(--color-gray-200);
    background: var(--color-white);
}
.vowel-cell .thai-char {
    font-size: 2rem;
    font-family: 'Sarabun', sans-serif;
    color: var(--color-gray-900);
    line-height: 1;
}
.vowel-cell .sound {
    font-size: 0.7rem;
    color: var(--color-primary);
    font-weight: 600;
    margin-top: 4px;
}
.vowel-cell:hover {
    border-color: var(--color-primary);
    box-shadow: var(--shadow-sm);
    transform: translateY(-2px);
}
.vowel-cell {
    position: relative;
}
.vowel-cell .btn-details {
    position: absolute;
    top: 4px;
    right: 4px;
    background: transparent;
    border: none;
    color: var(--color-gray-400);
    cursor: pointer;
    padding: 3px;
    border-radius: 50%;
    transition: all 0.2s;
    opacity: 0;
    font-size: 0.85rem;
    width: 22px;
    height: 22px;
    display: flex;
    align-items: center;
    justify-content: center;
}
.vowel-cell:hover .btn-details {
    opacity: 1;
}
.vowel-cell .btn-details:hover {
    background-color: rgba(0,0,0,0.08);
    color: var(--color-primary);
}

/* Section intro text */
.section-intro {
    color: var(--color-gray-600);
    font-size: var(--font-size-sm);
    margin-bottom: var(--spacing-4);
    line-height: 1.5;
}

/* ============================================
   Monophthong Cards
   ============================================ */
.mono-cards {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: var(--spacing-4);
}
.mono-card {
    background: var(--color-white);
    border: 1px solid var(--color-gray-200);
    border-radius: var(--radius-lg);
    padding: var(--spacing-4);
    display: flex;
    flex-direction: column;
    gap: var(--spacing-3);
}
.mono-header {
    border-bottom: 1px solid var(--color-gray-100);
    padding-bottom: var(--spacing-3);
}
.mono-sound {
    font-size: var(--font-size-2xl);
    font-weight: 700;
    color: var(--color-primary);
    display: block;
    line-height: 1;
    margin-bottom: var(--spacing-1);
}
.mono-ipa {
    font-family: monospace;
    font-size: var(--font-size-sm);
    color: var(--color-gray-500);
}
.mono-desc {
    font-size: var(--font-size-sm);
    color: var(--color-gray-600);
    margin-top: var(--spacing-1);
    display: block;
    line-height: 1.4;
}
.mono-forms {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-3);
}
.mono-form {
    cursor: pointer;
    padding: var(--spacing-3);
    border-radius: var(--radius-md);
    transition: background var(--transition-fast);
    text-align: center;
    background: var(--color-gray-50);
}
.mono-form:hover {
    background: rgba(13, 148, 136, 0.08);
}
.mono-length {
    font-size: var(--font-size-xs);
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    color: var(--color-gray-400);
    display: block;
    margin-bottom: var(--spacing-1);
}
.mono-written {
    font-size: 1.8rem;
    font-family: 'Sarabun', sans-serif;
    color: var(--color-gray-800);
    display: block;
    line-height: 1.2;
    margin-bottom: var(--spacing-2);
}
.mono-form .example-word .thai {
    font-weight: 600;
    font-size: var(--font-size-lg);
    font-family: 'Sarabun', sans-serif;
    display: block;
}
.mono-form .example-word .roman {
    font-size: var(--font-size-sm);
    color: var(--color-gray-600);
}
.mono-form .example-word .meaning {
    display: block;
    font-size: var(--font-size-sm);
    color: var(--color-gray-400);
    font-style: italic;
    margin-top: 2px;
}

/* ============================================
   Diphthong Cards
   ============================================ */
.diphthong-cards {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
    gap: var(--spacing-4);
}
.diphthong-card {
    border: 1px solid var(--color-gray-200);
    border-radius: var(--radius-lg);
    padding: var(--spacing-4);
    cursor: pointer;
    transition: all var(--transition-fast);
    background: var(--color-white);
}
.diphthong-card:hover {
    border-color: var(--color-primary);
    box-shadow: var(--shadow-sm);
}
.diphthong-header {
    display: flex;
    align-items: baseline;
    gap: var(--spacing-3);
    margin-bottom: var(--spacing-2);
}
.diphthong-header .written-form {
    font-size: 1.6rem;
    font-family: 'Sarabun', sans-serif;
    color: var(--color-gray-800);
}
.diphthong-header .sound-name {
    font-size: var(--font-size-lg);
    font-weight: 700;
    color: var(--color-primary);
}
.diphthong-header .sound-ipa {
    font-family: monospace;
    font-size: var(--font-size-xs);
    color: var(--color-gray-500);
}
.diphthong-card .sound-desc {
    font-size: var(--font-size-sm);
    color: var(--color-gray-600);
    margin-bottom: var(--spacing-3);
}
.diphthong-card .example-word {
    background: var(--color-gray-50);
    padding: var(--spacing-2) var(--spacing-3);
    border-radius: var(--radius-md);
    text-align: center;
}
.diphthong-card .example-word .thai {
    font-size: var(--font-size-xl);
    font-weight: 600;
    font-family: 'Sarabun', sans-serif;
}
.diphthong-card .example-word .roman {
    font-size: var(--font-size-sm);
    color: var(--color-gray-600);
    margin-left: var(--spacing-2);
}
.diphthong-card .example-word .meaning {
    display: block;
    font-size: var(--font-size-xs);
    color: var(--color-gray-400);
    font-style: italic;
    margin-top: 2px;
}

/* Special vowel forms */
.special-form-group {
    border: 1px solid var(--color-gray-200);
    border-radius: var(--radius-lg);
    padding: var(--spacing-4);
    margin-bottom: var(--spacing-4);
}
.special-form-group h4 {
    display: flex;
    align-items: baseline;
    gap: var(--spacing-2);
    margin-bottom: var(--spacing-2);
}
.special-form-group h4 .sound-name {
    font-size: var(--font-size-lg);
    font-weight: 700;
    color: var(--color-primary);
}
.special-form-group h4 .sound-ipa {
    font-family: monospace;
    font-size: var(--font-size-sm);
    color: var(--color-gray-500);
}
.special-form-group .sound-desc {
    font-size: var(--font-size-sm);
    color: var(--color-gray-600);
    margin-bottom: var(--spacing-3);
}
.special-form-variants {
    display: flex;
    gap: var(--spacing-3);
    flex-wrap: wrap;
}
.special-form-variant {
    flex: 0 1 200px;
    background: var(--color-gray-50);
    border-radius: var(--radius-md);
    padding: var(--spacing-3);
    cursor: pointer;
    transition: all var(--transition-fast);
    text-align: center;
}
.special-form-variant:hover {
    background: rgba(13, 148, 136, 0.08);
}
.special-form-variant .written-form {
    font-size: 1.4rem;
    font-family: 'Sarabun', sans-serif;
    display: block;
    color: var(--color-gray-800);
    line-height: 1.2;
    margin-bottom: var(--spacing-1);
}
.special-form-variant .variant-name {
    font-size: var(--font-size-xs);
    color: var(--color-gray-500);
    display: block;
    margin-bottom: var(--spacing-1);
}
.special-form-variant .thai {
    font-weight: 600;
    font-size: var(--font-size-base);
    font-family: 'Sarabun', sans-serif;
}
.special-form-variant .roman {
    font-size: var(--font-size-sm);
    color: var(--color-gray-600);
    margin-left: 4px;
}
.special-form-variant .meaning {
    font-size: var(--font-size-xs);
    color: var(--color-gray-400);
    font-style: italic;
    margin-left: 4px;
}

/* ============================================
   Tone Marks Tab
   ============================================ */
.tone-overview {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-4);
    margin-bottom: var(--spacing-8);
}
.tone-card {
    display: grid;
    grid-template-columns: 80px 1fr auto;
    gap: var(--spacing-4);
    align-items: center;
    border: 1px solid var(--color-gray-200);
    border-radius: var(--radius-lg);
    padding: var(--spacing-4);
    background: var(--color-white);
    transition: all var(--transition-fast);
}
.tone-card:hover {
    box-shadow: var(--shadow-sm);
}

.tone-contour-visual {
    width: 70px;
    height: 45px;
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
}
.tone-contour-visual svg {
    width: 100%;
    height: 100%;
}
.tone-lottie {
    width: 100%;
    height: 100%;
}

.tone-info h4 {
    font-size: var(--font-size-base);
    font-weight: 600;
    color: var(--color-gray-800);
    margin-bottom: 2px;
}
.tone-info .tone-thai-name {
    font-size: var(--font-size-xs);
    color: var(--color-gray-500);
    font-family: 'Sarabun', sans-serif;
}
.tone-mark-display {
    font-size: 1.6rem;
    font-family: 'Sarabun', sans-serif;
    color: var(--color-gray-800);
    display: inline-block;
    margin: var(--spacing-1) 0;
}
.tone-mark-display.muted {
    color: var(--color-gray-400);
    font-size: var(--font-size-sm);
    font-family: inherit;
}
.tone-info .tone-desc {
    font-size: var(--font-size-sm);
    color: var(--color-gray-600);
    margin-top: var(--spacing-1);
}

.tone-examples-list {
    display: flex;
    gap: var(--spacing-2);
    flex-wrap: wrap;
}
.tone-example {
    background: var(--color-gray-50);
    padding: var(--spacing-2) var(--spacing-3);
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition-fast);
    text-align: center;
    min-width: 70px;
}
.tone-example:hover {
    background: rgba(13, 148, 136, 0.08);
}
.tone-example .thai {
    font-size: var(--font-size-lg);
    font-weight: 600;
    font-family: 'Sarabun', sans-serif;
    display: block;
}
.tone-example .roman {
    font-size: var(--font-size-xs);
    color: var(--color-gray-500);
}
.tone-example .meaning {
    font-size: var(--font-size-xs);
    color: var(--color-gray-400);
    display: block;
}

/* Tone Comparison Section */
.tone-comparison {
    background: var(--color-gray-50);
    border-radius: var(--radius-lg);
    padding: var(--spacing-6);
}
.tone-comparison h3 {
    font-size: var(--font-size-lg);
    font-weight: 600;
    margin-bottom: var(--spacing-1);
}
.tone-comparison > p {
    font-size: var(--font-size-sm);
    color: var(--color-gray-600);
    margin-bottom: var(--spacing-4);
}
.comparison-row {
    display: flex;
    gap: var(--spacing-3);
    flex-wrap: wrap;
    justify-content: center;
}
.comp-item {
    background: var(--color-white);
    border: 1px solid var(--color-gray-200);
    border-radius: var(--radius-lg);
    padding: var(--spacing-3) var(--spacing-4);
    text-align: center;
    cursor: pointer;
    transition: all var(--transition-fast);
    min-width: 120px;
}
.comp-item:hover {
    border-color: var(--color-primary);
    box-shadow: var(--shadow-sm);
}
.comp-item .thai {
    font-size: var(--font-size-xl);
    font-weight: 600;
    font-family: 'Sarabun', sans-serif;
    display: block;
    margin-bottom: 2px;
}
.comp-item .tone-label {
    font-size: var(--font-size-xs);
    color: var(--color-gray-500);
    display: block;
}
.comp-item .meaning {
    font-size: var(--font-size-xs);
    color: var(--color-primary);
    font-weight: 500;
    display: block;
    margin-top: 2px;
}

/* ============================================
   Tone Rules Cheatsheet
   ============================================ */
/* ============================================
   Tone Rules Cheatsheet
   ============================================ */
.tone-cheatsheet h3 {
    font-size: var(--font-size-2xl);
    font-weight: 600;
    margin-bottom: var(--spacing-2);
}
.tone-cheatsheet > .section-intro {
    font-size: var(--font-size-base);
    margin-bottom: var(--spacing-6);
}

/* Unified Rules Table */
.tone-rules-table {
    width: 100%;
    border-collapse: separate;
    border-spacing: 0;
    border: 1px solid var(--color-gray-200);
    border-radius: var(--radius-lg);
    overflow: hidden;
    margin-bottom: var(--spacing-8);
    background: var(--color-white);
}
.tone-rules-table thead th {
    background: var(--color-gray-50);
    padding: var(--spacing-4) var(--spacing-4);
    font-weight: 600;
    text-align: center;
    border-bottom: 2px solid var(--color-gray-200);
    vertical-align: top;
}
.tone-rules-table thead th.th-condition {
    text-align: left;
    width: 32%;
}
.tone-rules-table .th-class-name {
    font-size: var(--font-size-lg);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: var(--spacing-2);
}
.tone-rules-table .th-class-consonants {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 4px;
}
.tone-rules-table .th-class-consonants {
    font-family: 'Sarabun', sans-serif;
    font-size: 1.5rem;
    line-height: 1.6;
    color: var(--color-gray-700);
    letter-spacing: 2px;
    word-break: break-all;
}
.tone-rules-table tbody td {
    padding: var(--spacing-3) var(--spacing-4);
    text-align: center;
    border-bottom: 1px solid var(--color-gray-100);
    font-size: var(--font-size-lg);
    color: var(--color-gray-400);
    vertical-align: middle;
}
.tone-rules-table tbody tr:last-child td {
    border-bottom: none;
}
.tone-rules-table tbody tr:hover td {
    background: var(--color-gray-50);
}
.tone-rules-table .td-condition {
    text-align: left;
    font-size: var(--font-size-lg);
    color: var(--color-gray-800);
    font-weight: 500;
    font-family: 'Sarabun', sans-serif;
}
.tone-rules-table .condition-note {
    font-size: var(--font-size-sm);
    color: var(--color-gray-400);
    font-weight: 400;
    margin-left: var(--spacing-1);
}
.tone-rules-table .td-mark {
    font-size: 2.5rem;
    font-weight: 600;
    line-height: 1;
    font-family: 'Sarabun', sans-serif;
    color: var(--color-gray-800);
    vertical-align: middle;
}

/* Section headers inside table */
.tone-rules-table .section-header td {
    background: var(--color-gray-50);
    font-size: var(--font-size-sm);
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    color: var(--color-gray-500);
    padding: var(--spacing-3) var(--spacing-4);
    border-top: 2px solid var(--color-gray-200);
}
.tone-rules-table tbody:first-of-type .section-header td {
    border-top: none;
}

/* Tone symbols (diacritic marks) */
.tone-symbol {
    font-size: 3rem;
    font-weight: 700;
    line-height: 1;
}
.tone-symbol.tone-mid { color: #6B7280; }
.tone-symbol.tone-low { color: #3B82F6; }
.tone-symbol.tone-falling { color: #F59E0B; }
.tone-symbol.tone-high { color: #EF4444; }
.tone-symbol.tone-rising { color: #8B5CF6; }

/* N/A placeholder */
.tone-na {
    font-size: var(--font-size-sm);
    color: var(--color-gray-300);
    font-weight: 500;
}

/* Syllable Types */
.syllable-types-info h4 {
    font-size: var(--font-size-xl);
    font-weight: 600;
    margin-bottom: var(--spacing-4);
}
.syllable-cards {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-4);
}
.syllable-card {
    background: var(--color-white);
    border: 1px solid var(--color-gray-200);
    border-radius: var(--radius-lg);
    padding: var(--spacing-5);
    transition: all var(--transition-fast);
}
.syllable-card:hover {
    box-shadow: var(--shadow-sm);
}
.syllable-card.live {
    border-left: 3px solid #A8D9B8;
}
.syllable-card.dead {
    border-left: 3px solid #D9B8A0;
}
.syllable-card h5 {
    font-size: var(--font-size-lg);
    font-weight: 600;
    margin-bottom: var(--spacing-3);
    color: var(--color-gray-800);
}
.syllable-card p {
    font-size: var(--font-size-base);
    color: var(--color-gray-600);
    line-height: 1.5;
    margin: 0;
}

@media (max-width: 900px) {
    .tone-rules-grid {
        grid-template-columns: 1fr;
    }
}
@media (max-width: 600px) {
    .syllable-cards {
        grid-template-columns: 1fr;
    }
}

/* ============================================
   Responsive
   ============================================ */
@media (max-width: 900px) {
    .consonant-grid {
        grid-template-columns: repeat(8, 1fr);
    }
    .tone-card {
        grid-template-columns: 70px 1fr;
    }
    .tone-examples-list {
        grid-column: 1 / -1;
        margin-top: var(--spacing-2);
    }
}
@media (max-width: 600px) {
    .consonant-grid {
        grid-template-columns: repeat(6, 1fr);
        gap: 4px;
    }
    .consonant-cell .thai-char {
        font-size: 1.8rem;
    }
    .mono-cards {
        grid-template-columns: 1fr;
    }
    .tone-rules-table .th-class-consonants {
        display: none;
    }
    .tone-rules-table thead th.th-condition {
        width: 40%;
    }
    .diphthong-cards {
        grid-template-columns: 1fr;
    }
    .syllable-cards {
        grid-template-columns: 1fr;
    }
    .comparison-row {
        flex-direction: column;
        align-items: stretch;
    }
    .tone-card {
        grid-template-columns: 1fr;
        text-align: center;
    }
}