/* Load order 3/5 — layout grid, main, sidebar, views (KWIC, n-gram, etc.). */

.corpus-selector-bar {
    border: 1px solid var(--border-color-medium);
    border-radius: var(--radius-md);
    background: var(--bg-primary);
    padding: 0.75rem;
    margin: 0 0 0.75rem 0;
}

.corpus-selector-track {
    display: flex;
    gap: 0.75rem;
    overflow-x: auto;
    padding-bottom: 0.25rem;
}

.corpus-card {
    min-width: 190px;
    border: 1px solid #7ca4c4;
    border-radius: 6px;
    background: #f5f8fb;
    color: var(--text-primary);
    display: flex;
    align-items: center;
    gap: 0.65rem;
    padding: 0.9rem 0.8rem;
    position: relative;
    text-align: left;
}

.corpus-card-main {
    border: none;
    background: transparent;
    color: inherit;
    display: flex;
    align-items: center;
    gap: 0.65rem;
    width: 100%;
    padding: 0;
    text-align: left;
    cursor: pointer;
}

.corpus-card-main:disabled {
    cursor: default;
}

.corpus-card.active {
    border-color: var(--color-primary);
    background: #eaf3ff;
}

.corpus-card:focus-visible {
    outline: 2px solid var(--color-primary);
    outline-offset: 2px;
}

.corpus-card-main:focus-visible {
    outline: 2px solid var(--color-primary);
    outline-offset: 2px;
    border-radius: 4px;
}

.corpus-card-icon {
    width: 42px;
    height: 42px;
    flex: 0 0 42px;
}

.corpus-card-name {
    font-size: 1.05rem;
    color: #2f6e98;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    max-width: 120px;
}

.corpus-card-remove {
    position: absolute;
    right: 8px;
    top: 6px;
    border: none;
    background: transparent;
    width: 16px;
    height: 16px;
    padding: 0;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    line-height: 0.8;
    color: #567ea2;
    cursor: pointer;
}

.corpus-card-rename {
    position: absolute;
    right: 24px;
    top: 6px;
    border: none;
    background: transparent;
    width: 16px;
    height: 16px;
    padding: 0;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    color: #567ea2;
    cursor: pointer;
}

.corpus-card-rename-icon {
    width: 16px;
    height: 16px;
    display: block;
}

.corpus-card-name-input {
    max-width: 120px;
    border: 1px solid #7ca4c4;
    border-radius: 4px;
    font-size: 0.95rem;
    color: #2f6e98;
    padding: 0.1rem 0.3rem;
}

.layout {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-md);
    width: 100%;
    max-width: 100%;
    box-sizing: border-box;
    overflow-x: hidden;
}

@media (min-width: 1024px) {
    .layout {
        grid-template-columns: 1fr 300px;
        gap: var(--spacing-md);
    }
    
    /* Expand main area when sidebar is hidden */
    .layout:has(#sidebar[style*="display: none"]) {
        grid-template-columns: 1fr;
    }
    
    .layout.sidebar-hidden {
        grid-template-columns: 1fr;
    }
}

main {
    background-color: var(--bg-primary);
    border: 1px solid var(--border-color-medium);
    border-radius: var(--radius-lg);
    padding: var(--spacing-md);
    order: 1;
    overflow-x: hidden;
    width: 100%;
    max-width: 100%;
    box-sizing: border-box;
    box-shadow: var(--shadow-sm);
}

@media (min-width: 768px) {
    main {
        padding: var(--spacing-md);
    }
}

@media (min-width: 1024px) {
    main {
        padding: var(--spacing-xl);
        order: 0;
    }
}

.sidebar {
    background-color: var(--bg-primary);
    border: 1px solid var(--border-color-medium);
    border-radius: var(--radius-lg);
    padding: var(--spacing-md);
    max-height: none;
    overflow-y: visible;
    position: relative;
    order: 0;
    box-shadow: var(--shadow-sm);
}

@media (min-width: 1024px) {
    .sidebar {
        padding: var(--spacing-md);
        max-height: calc(100vh - 40px);
        overflow-y: auto;
        position: sticky;
        top: var(--spacing-md);
        order: 1;
    }
}

.sidebar h3 {
    margin-top: 0;
    font-size: var(--font-size-base);
    font-weight: var(--font-weight-semibold);
    border-bottom: 2px solid var(--color-primary);
    padding-bottom: var(--spacing-sm);
    color: var(--text-primary);
}

.sidebar-header {
    display: none;
}

.sidebar-content {
    transition: max-height 0.3s ease, opacity 0.3s ease;
    overflow: hidden;
}

@media (max-width: 767px) {
    .sidebar-header {
        display: flex;
        justify-content: space-between;
        align-items: center;
        cursor: pointer;
        user-select: none;
        -webkit-user-select: none;
        font-size: 16px;
        font-weight: 600;
        padding: 12px 0;
        border-bottom: 2px solid #007bff;
        margin-bottom: 0;
        touch-action: manipulation;
        -webkit-tap-highlight-color: rgba(0, 123, 255, 0.2);
        min-height: 44px;
        position: relative;
        z-index: 10;
    }
    
    .sidebar-header .sidebar-toggle-icon {
        font-size: 12px;
        color: #007bff;
        transition: transform 0.3s ease;
    }
    
    .sidebar.collapsed .sidebar-header .sidebar-toggle-icon {
        transform: rotate(-90deg);
    }
    
    .sidebar-content {
        max-height: 0;
        opacity: 0;
        overflow: hidden;
        padding-top: 0;
        margin-top: 0;
    }
    
    .sidebar:not(.collapsed) .sidebar-content {
        max-height: 5000px;
        opacity: 1;
        padding-top: 15px;
        margin-top: 0;
    }
    
    .stats .stats-title {
        display: none;
    }
}

/* Apply mobile behavior to portrait touch devices (tablets in portrait) */
body.mobile-behavior .sidebar-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    cursor: pointer;
    user-select: none;
    -webkit-user-select: none;
    font-size: 16px;
    font-weight: 600;
    padding: 12px 0;
    border-bottom: 2px solid #007bff;
    margin-bottom: 0;
    touch-action: manipulation;
    -webkit-tap-highlight-color: rgba(0, 123, 255, 0.2);
    min-height: 44px;
    position: relative;
    z-index: 10;
}

body.mobile-behavior .sidebar-header .sidebar-toggle-icon {
    font-size: var(--font-size-xs);
    color: var(--color-primary);
    transition: transform var(--transition-slow);
}

body.mobile-behavior .sidebar.collapsed .sidebar-header .sidebar-toggle-icon {
    transform: rotate(-90deg);
}

body.mobile-behavior .sidebar-content {
    max-height: 0;
    opacity: 0;
    overflow: hidden;
    padding-top: 0;
    margin-top: 0;
}

body.mobile-behavior .sidebar:not(.collapsed) .sidebar-content {
    max-height: 5000px;
    opacity: 1;
    padding-top: 15px;
    margin-top: 0;
}

body.mobile-behavior .stats .stats-title {
    display: none;
}

@media (min-width: 768px) {
    .sidebar-header {
        display: none;
    }
    
    .sidebar-content {
        max-height: none !important;
        opacity: 1 !important;
        padding-top: 0 !important;
        margin-top: 0 !important;
    }
}

/* Override desktop styles for mobile-behavior class on portrait touch devices (including iPadOS) */
/* Higher specificity to override @media (min-width: 768px) rules */
body.mobile-behavior .sidebar-header {
    display: flex !important;
    justify-content: space-between !important;
    align-items: center !important;
    cursor: pointer !important;
    user-select: none !important;
    -webkit-user-select: none !important;
    font-size: 16px !important;
    font-weight: 600 !important;
    padding: 12px 0 !important;
    border-bottom: 2px solid #007bff !important;
    margin-bottom: 0 !important;
    touch-action: manipulation !important;
    -webkit-tap-highlight-color: rgba(0, 123, 255, 0.2) !important;
    min-height: 44px !important;
    position: relative !important;
    z-index: 10 !important;
}

body.mobile-behavior .sidebar-header .sidebar-toggle-icon {
    font-size: 12px !important;
    color: #007bff !important;
    transition: transform 0.3s ease !important;
}

body.mobile-behavior .sidebar.collapsed .sidebar-header .sidebar-toggle-icon {
    transform: rotate(-90deg) !important;
}

body.mobile-behavior .sidebar-content {
    max-height: 0 !important;
    opacity: 0 !important;
    overflow: hidden !important;
    padding-top: 0 !important;
    margin-top: 0 !important;
}

body.mobile-behavior .sidebar:not(.collapsed) .sidebar-content {
    max-height: 5000px !important;
    opacity: 1 !important;
    padding-top: 15px !important;
    margin-top: 0 !important;
}

body.mobile-behavior .stats .stats-title {
    display: none !important;
}

.sidebar section {
    margin-bottom: var(--spacing-md);
}

/* Simple rows for stats */
.stat-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-xs) 0;
    border-bottom: 1px dashed var(--color-gray-200);
    font-size: var(--font-size-sm);
}

.stat-row strong {
    color: var(--color-primary);
    font-weight: var(--font-weight-semibold);
}

.stats-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-sm);
    margin-top: var(--spacing-sm);
}

.stat-item {
    background-color: var(--bg-secondary);
    padding: var(--spacing-sm);
    border-radius: var(--radius-sm);
    text-align: center;
    box-shadow: var(--shadow-xs);
}

.stat-label {
    font-size: var(--font-size-xs);
    color: var(--text-secondary);
    text-transform: uppercase;
    font-weight: var(--font-weight-medium);
}

.stat-value {
    font-size: var(--font-size-xl);
    font-weight: var(--font-weight-bold);
    color: var(--color-primary);
}

.legend {
    max-height: 300px;
    overflow-y: auto;
}

.legend-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-sm);
    font-size: var(--font-size-xs);
    cursor: pointer;
    padding: var(--spacing-xs);
    border-radius: var(--radius-sm);
    transition: background-color var(--transition-base), border-color var(--transition-base);
    touch-action: manipulation;
    -webkit-tap-highlight-color: rgba(0, 123, 255, 0.2);
    user-select: none;
    -webkit-user-select: none;
}

.legend-item:hover {
    background-color: var(--bg-secondary);
}

.legend-item.active {
    background-color: var(--bg-hover);
    border: 2px solid var(--color-primary);
}

.legend-color {
    width: 30px;
    height: 3px;
    flex-shrink: 0;
}

.legend-tag {
    font-weight: var(--font-weight-bold);
    min-width: 50px;
}

.legend-desc {
    color: var(--text-secondary);
    font-size: var(--font-size-xs);
}

.legend-count {
    margin-left: auto;
    color: var(--text-tertiary);
    font-size: var(--font-size-xs);
}

.filter-tags {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-xs);
    margin-top: var(--spacing-sm);
}

.filter-tag {
    background-color: var(--color-gray-200);
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--radius-sm);
    font-size: var(--font-size-xs);
    cursor: pointer;
    border: 2px solid transparent;
    transition: all var(--transition-base);
}

.filter-tag:hover {
    background-color: var(--color-gray-300);
}

.filter-tag.active {
    background-color: var(--color-primary);
    color: var(--text-inverse);
}

.filter-tag:focus {
    outline: 2px solid var(--color-primary);
    outline-offset: 1px;
}

p {
    margin-bottom: var(--spacing-md);
    font-size: var(--font-size-sm);
    line-height: var(--line-height-relaxed);
    color: var(--text-primary);
}

@media (min-width: 768px) {
    p {
        margin-bottom: var(--spacing-md);
        font-size: inherit;
        line-height: var(--line-height-loose);
    }
}

.token-container {
    position: relative;
    display: inline-block;
    cursor: help;
    /* Make tokens more tappable on mobile */
    touch-action: manipulation;
    -webkit-tap-highlight-color: rgba(0, 123, 255, 0.2);
}

.token-word {
    border-bottom-width: 3px;
    border-bottom-style: solid;
    padding-bottom: 1px;
}

#outputContainerCensor .token-container {
    cursor: pointer;
}

/* Neutral underline per token (no PoS colors) */
#outputContainerCensor .token-word.token-word--censor-lite {
    border-bottom-color: var(--border-color-medium);
}

.token-word.filtered-out {
    opacity: 0.2;
}

.token-word.highlight {
    background-color: var(--color-warning);
    color: var(--text-primary);
}

.token-popup {
    visibility: hidden;
    opacity: 0;
    transition: opacity var(--transition-slow);
    width: 240px;
    background-color: var(--color-gray-900);
    color: var(--text-inverse);
    text-align: left;
    border-radius: var(--radius-md);
    padding: var(--spacing-sm);
    font-size: var(--font-size-sm);
    font-family: monospace;
    line-height: var(--line-height-normal);
    position: fixed;
    z-index: var(--z-index-token-popup);
    box-shadow: var(--shadow-lg);
    /* Prevent popup from being selectable */
    user-select: none;
    -webkit-user-select: none;
    pointer-events: none; /* Allow clicks to pass through to document */
}

.token-popup::after {
    content: "";
    position: absolute;
    top: 100%;
    left: 50%;
    transform: translateX(-50%);
    border-width: 5px;
    border-style: solid;
    border-color: #222 transparent transparent transparent;
}

/* Arrow when popup appears below the word */
.token-popup.popup-below::after {
    top: auto;
    bottom: 100%;
    border-color: transparent transparent #222 transparent;
}

.token-popup-line {
    display: block;
    margin-bottom: 4px;
}

.token-popup-line strong {
    color: #89ddff;
}

.loading {
    text-align: center;
    padding: 40px;
    color: #666;
}

.spinner {
    border: 3px solid var(--color-gray-200);
    border-top: 3px solid var(--color-primary);
    border-radius: var(--radius-full);
    width: 40px;
    height: 40px;
    animation: spin 1s linear infinite;
    margin: 0 auto var(--spacing-sm);
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

/* Error banner for unified feedback */
#errorBanner {
    border-bottom-left-radius: 6px;
    border-bottom-right-radius: 6px;
}

.toast {
    position: fixed;
    bottom: var(--spacing-md);
    right: var(--spacing-md);
    background-color: var(--color-success);
    color: var(--text-inverse);
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-lg);
    opacity: 0;
    transition: opacity var(--transition-slow);
    z-index: var(--z-index-tooltip);
}

.toast.show {
    opacity: 1;
}

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

.runtime-errors {
    position: fixed;
    top: var(--spacing-sm);
    left: var(--spacing-sm);
    right: var(--spacing-sm);
    z-index: var(--z-index-tooltip);
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
    pointer-events: none;
}

.runtime-error-item {
    background: #ff6b6b;
    color: #fff;
    padding: 10px 12px;
    border-radius: 6px;
    text-align: center;
    box-shadow: var(--shadow-md);
    pointer-events: auto;
}

.runtime-error-detailed {
    font-family: monospace;
    white-space: pre-wrap;
    text-align: left;
}

.pos-distribution {
    margin-top: var(--spacing-md);
}

.bar-chart {
    margin-top: var(--spacing-sm);
}

.bar-item {
    display: flex;
    align-items: center;
    margin-bottom: var(--spacing-xs);
    font-size: var(--font-size-xs);
    gap: var(--spacing-xs);
}

.bar-label {
    width: 45px;
    font-weight: var(--font-weight-bold);
    flex-shrink: 0;
}

.bar-container {
    flex: 1;
    background-color: var(--color-gray-200);
    border-radius: var(--radius-sm);
    height: 18px;
    position: relative;
    overflow: hidden;
}

.bar-fill {
    height: 100%;
    background-color: var(--color-primary);
    border-radius: var(--radius-sm);
    transition: width var(--transition-slow);
}

.bar-value {
    color: var(--text-secondary);
    min-width: 30px;
    text-align: right;
    flex-shrink: 0;
}

/* Word Frequency List Styles */
.word-frequency {
    margin-bottom: 24px;
}

.frequency-controls {
    margin-bottom: 12px;
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
}

.toggle-btn {
    background-color: var(--bg-secondary);
    border: 1px solid var(--border-color-medium);
    color: var(--text-primary);
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--radius-md);
    font-size: var(--font-size-sm);
    cursor: pointer;
    transition: all var(--transition-base);
    width: 100%;
    font-weight: var(--font-weight-medium);
    box-shadow: var(--shadow-sm);
}

.toggle-btn:hover {
    background-color: var(--color-gray-200);
    border-color: var(--color-primary);
    color: var(--color-primary);
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

.toggle-btn:active {
    transform: translateY(0);
    box-shadow: var(--shadow-sm);
}

.toggle-btn.active {
    background-color: var(--color-primary);
    color: var(--text-inverse);
    border-color: var(--color-primary);
}

.toggle-btn.active:hover {
    background-color: var(--color-primary-hover);
    border-color: var(--color-primary-hover);
    color: var(--text-inverse);
}

.toggle-btn:focus {
    outline: 2px solid var(--color-primary);
    outline-offset: 2px;
}

.frequency-list {
    max-height: 400px;
    overflow-y: auto;
    border: 1px solid var(--color-gray-200);
    border-radius: var(--radius-md);
    background-color: var(--color-gray-50);
    padding: var(--spacing-sm);
    scrollbar-width: thin;
    scrollbar-color: var(--color-gray-400) var(--color-gray-100);
    box-shadow: var(--shadow-xs);
}

/* Custom scrollbar styling for webkit browsers */
.frequency-list::-webkit-scrollbar {
    width: var(--spacing-sm);
}

.frequency-list::-webkit-scrollbar-track {
    background: var(--color-gray-100);
    border-radius: var(--radius-sm);
}

.frequency-list::-webkit-scrollbar-thumb {
    background: var(--color-gray-400);
    border-radius: var(--radius-sm);
    transition: background var(--transition-base);
}

.frequency-list::-webkit-scrollbar-thumb:hover {
    background: var(--color-gray-500);
}

.frequency-item {
    display: grid;
    grid-template-columns: 25px 1fr 50px 50px;
    gap: var(--spacing-sm);
    align-items: center;
    padding: var(--spacing-sm) var(--spacing-sm);
    margin-bottom: var(--spacing-xs);
    border-radius: var(--radius-sm);
    font-size: var(--font-size-sm);
    cursor: pointer;
    transition: all var(--transition-base);
    border-left: 3px solid transparent;
    background-color: var(--bg-primary);
    box-shadow: var(--shadow-xs);
    position: relative;
    touch-action: manipulation;
    -webkit-tap-highlight-color: rgba(0, 123, 255, 0.2);
    user-select: none;
    -webkit-user-select: none;
}

.frequency-item:hover {
    background-color: var(--bg-hover);
    border-left-color: var(--color-primary);
    transform: translateX(2px);
    box-shadow: var(--shadow-md);
}

.frequency-item:active {
    transform: translateX(1px);
}

.frequency-item.selected {
    background-color: var(--bg-hover);
    border-left-color: var(--color-primary);
    border-left-width: 4px;
    box-shadow: var(--shadow-lg);
}

.frequency-item.selected .frequency-word {
    color: var(--color-primary);
    font-weight: var(--font-weight-semibold);
}

.frequency-item.selected .frequency-count {
    color: var(--color-primary-hover);
}

.frequency-item.selected::before {
    opacity: 0.5;
}

.frequency-rank {
    color: var(--color-gray-600);
    font-size: var(--font-size-xs);
    text-align: left;
    font-weight: var(--font-weight-semibold);
    font-variant-numeric: tabular-nums;
}

.frequency-word {
    font-weight: var(--font-weight-medium);
    color: var(--color-gray-900);
    border-bottom: 2px solid;
    padding-bottom: 2px;
    word-break: break-word;
    overflow-wrap: break-word;
    hyphens: auto;
    transition: color var(--transition-base);
}

.frequency-item:hover .frequency-word {
    color: var(--color-primary);
}

.frequency-count {
    color: var(--color-primary);
    font-weight: var(--font-weight-semibold);
    text-align: right;
    font-size: var(--font-size-sm);
    font-variant-numeric: tabular-nums;
}

.frequency-percentage {
    color: var(--color-gray-600);
    font-size: var(--font-size-xs);
    text-align: right;
    font-variant-numeric: tabular-nums;
}

/* Subtle frequency indicator bar */
.frequency-item::before {
    content: '';
    position: absolute;
    left: 0;
    bottom: 0;
    height: 2px;
    background: linear-gradient(90deg, var(--color-primary), var(--color-primary-hover));
    border-radius: 0 0 var(--radius-sm) var(--radius-sm);
    opacity: 0;
    transition: opacity var(--transition-base);
}

.frequency-item:hover::before {
    opacity: 0.3;
}

.token-word.highlight-frequency {
    background-color: #fff3cd;
    border-bottom-color: var(--color-warning) !important;
    border-bottom-width: 4px !important;
    padding: 2px var(--spacing-xs);
    border-radius: var(--radius-sm);
    box-shadow: 0 0 0 2px rgba(255, 193, 7, 0.3);
    transition: all var(--transition-slow);
    animation: highlightPulse 0.6s ease-out;
}

@keyframes highlightPulse {
    0% {
        box-shadow: 0 0 0 0 rgba(255, 193, 7, 0.6);
    }
    50% {
        box-shadow: 0 0 0 4px rgba(255, 193, 7, 0.3);
    }
    100% {
        box-shadow: 0 0 0 2px rgba(255, 193, 7, 0.3);
    }
}

@media (max-width: 767px) {
    .word-frequency {
        margin-bottom: 20px;
    }
    
    .frequency-list {
        max-height: 300px;
        padding: 8px;
    }
    
    .frequency-item {
        grid-template-columns: 20px 1fr 45px 45px;
        gap: 8px;
        padding: 8px 8px;
        font-size: 12px;
        margin-bottom: 5px;
        /* Disable filtering interactions on mobile - show data only */
        pointer-events: none;
        cursor: default;
        opacity: 0.9;
    }
    
    .frequency-item:hover {
        background-color: #fff;
        border-left-color: transparent;
        transform: none;
        box-shadow: 0 1px 2px rgba(0, 0, 0, 0.03);
    }
    
    .frequency-item:active {
        transform: none;
    }
    
    .frequency-rank {
        font-size: 11px;
    }
    
    .frequency-count {
        font-size: 13px;
    }
    
    .frequency-percentage {
        font-size: 11px;
    }
    
    .toggle-btn {
        padding: 10px 14px;
        font-size: 13px;
    }
    
    /* Disable filtering interactions on mobile - show data only */
    .legend-item {
        pointer-events: none;
        cursor: default;
        opacity: 0.85;
    }
    
    .legend-item:hover {
        background-color: transparent;
    }
}

/* Apply mobile touch interaction disabling to portrait touch devices */
body.mobile-behavior .frequency-item {
    /* Disable filtering interactions on portrait touch devices - show data only */
    pointer-events: none;
    cursor: default;
    opacity: 0.9;
}

body.mobile-behavior .frequency-item:hover {
    background-color: #fff;
    border-left-color: transparent;
    transform: none;
    box-shadow: 0 1px 2px rgba(0, 0, 0, 0.03);
}

body.mobile-behavior .frequency-item:active {
    transform: none;
}

body.mobile-behavior .legend-item {
    /* Disable filtering interactions on portrait touch devices - show data only */
    pointer-events: none;
    cursor: default;
    opacity: 0.85;
}

body.mobile-behavior .legend-item:hover {
    background-color: transparent;
}

.view-options {
    margin-top: 10px;
}

.view-options label {
    display: block;
    margin-bottom: 8px;
    font-size: 12px;
}

.view-options input[type="range"] {
    width: 100%;
}

/* iOS Safari specific fixes */
@supports (-webkit-touch-callout: none) {
    /* iOS Safari specific styles */
    body {
        -webkit-font-smoothing: antialiased;
        -webkit-tap-highlight-color: transparent;
    }
    
    /* Fix input zoom on iOS */
    input[type="text"],
    input[type="search"],
    input[type="url"],
    textarea,
    select {
        font-size: 16px !important; /* Prevents zoom on focus */
    }
    
    /* Better touch targets for iOS */
    button,
    .file-input-label {
        min-height: 44px; /* Apple's recommended touch target size */
        min-width: 44px;
        -webkit-tap-highlight-color: rgba(0, 0, 0, 0.1);
    }
    
    /* Fix sticky positioning on iOS */
    .sidebar {
        position: -webkit-sticky;
        position: sticky;
    }
    
    /* Prevent text selection issues on iOS */
    .token-word {
        -webkit-user-select: none;
        user-select: none;
    }
    
    /* Fix overflow scrolling on iOS */
    .sidebar {
        -webkit-overflow-scrolling: touch;
    }
}

/* Additional mobile optimizations */
@media (max-width: 767px) {
    /* Improve touch targets */
    .token-container {
        min-height: 32px;
        padding: 2px 0;
        cursor: pointer; /* Show pointer cursor on mobile to indicate clickability */
    }
    
    /* Better popup styling on mobile */
    .token-popup {
        width: 90%;
        max-width: 280px;
        min-width: 240px;
        font-size: 12px;
        padding: 12px;
        box-shadow: 0 6px 20px rgba(0,0,0,0.3);
        /* Ensure popup stays on screen */
        max-height: 200px;
        overflow-y: auto;
    }
    
    .token-popup-line {
        font-size: 12px;
        margin-bottom: 6px;
    }
    
    /* Better spacing for mobile */
    .sidebar section {
        margin-bottom: 15px;
    }
    
    /* Compact stats on mobile */
    .stat-row {
        padding: 8px 0;
        font-size: 13px;
    }
    
    /* Better legend on mobile */
    .legend-item {
        padding: 8px 4px;
        font-size: 11px;
    }
    
    /* Improve control actions on mobile */
    .control-actions {
        display: grid;
        grid-template-columns: 1fr 1fr;
        gap: 8px;
    }
    
    .control-actions button {
        font-size: 14px;
        padding: 10px;
    }
    
    /* Better drop zone text on mobile */
    .drop-zone-content p {
        font-size: 14px;
        margin: 6px 0;
    }
    
    /* Improve header text on mobile */
    header p {
        font-size: 13px;
        margin-bottom: 12px;
    }
}

/* Tab Navigation Styles */
.tab-navigation {
    display: flex;
    gap: 8px;
    margin: 20px 0;
    border-bottom: 2px solid #e0e0e0;
}

.tab-button {
    background: none;
    border: none;
    padding: var(--spacing-sm) var(--spacing-lg);
    font-size: var(--font-size-base);
    font-weight: var(--font-weight-medium);
    color: var(--text-secondary);
    cursor: pointer;
    border-bottom: 3px solid transparent;
    transition: all var(--transition-base);
    position: relative;
    bottom: -2px;
}

.tab-button:hover {
    color: var(--text-primary);
    background-color: var(--color-gray-100);
}

.tab-button.active {
    color: var(--color-primary);
    border-bottom-color: var(--color-primary);
    font-weight: var(--font-weight-semibold);
}

.tab-button:focus {
    outline: 2px solid var(--color-primary);
    outline-offset: 2px;
    border-radius: var(--radius-sm);
}

.tab-content {
    display: none;
}

.tab-content.active {
    display: block;
}

/* Download Buttons */
.download-buttons {
    display: flex;
    gap: var(--spacing-sm);
    justify-content: center;
    flex-wrap: wrap;
    padding: var(--spacing-md);
    background-color: var(--bg-secondary);
    border-radius: var(--radius-lg);
    border: 1px solid var(--border-color-light);
    box-shadow: var(--shadow-xs);
}

.download-btn {
    background-color: var(--color-primary);
    color: var(--text-inverse);
    border: none;
    padding: var(--spacing-sm) var(--spacing-lg);
    font-size: var(--font-size-base);
    font-weight: var(--font-weight-medium);
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: background-color var(--transition-base), transform var(--transition-fast);
}

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

.download-btn:active {
    background-color: var(--color-primary-active);
    transform: translateY(0);
}

@media (max-width: 767px) {
    .tab-button {
        padding: 10px 16px;
        font-size: 14px;
    }
    
    .download-buttons {
        flex-direction: column;
    }
    
    .download-btn {
        width: 100%;
    }
}

/* Main View Tab Navigation — stacked below 1024px; fixed left rail at 1024px+ */
.main-view-tabs {
    position: static;
    display: flex;
    flex-direction: row;
    flex-wrap: wrap;
    justify-content: center;
    align-content: flex-start;
    gap: var(--spacing-xs);
    width: 100%;
    margin: 0 auto var(--spacing-md);
    padding: var(--spacing-sm);
    box-sizing: border-box;
    background-color: var(--bg-primary);
    border: 1px solid var(--border-color-medium);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
}

.main-tab-button {
    background: none;
    border: none;
    padding: var(--spacing-sm) var(--spacing-md);
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-medium);
    color: var(--text-secondary);
    cursor: pointer;
    border-bottom: 3px solid transparent;
    border-radius: var(--radius-sm);
    transition: background-color var(--transition-base), color var(--transition-base), border-color var(--transition-base);
    text-align: center;
    flex: 0 1 auto;
    min-height: 44px;
    line-height: var(--line-height-tight);
}

.main-tab-button:hover {
    color: var(--text-primary);
    background-color: var(--color-gray-100);
}

.main-tab-button.active {
    color: var(--color-primary);
    border-bottom-color: var(--color-primary);
    font-weight: var(--font-weight-semibold);
    background-color: var(--color-gray-50);
}

@media (max-width: 1023px) {
    .main-tab-button {
        padding: 10px 12px;
        font-size: var(--font-size-xs);
        white-space: normal;
    }
}

@media (min-width: 1024px) {
    .main-view-tabs {
        position: fixed;
        z-index: var(--z-index-fixed);
        left: max(env(safe-area-inset-left), var(--spacing-md));
        top: 50%;
        transform: translateY(-50%);
        flex-direction: column;
        align-items: stretch;
        justify-content: flex-start;
        width: var(--main-view-rail-width);
        max-width: min(var(--main-view-rail-width), calc(100vw - env(safe-area-inset-left) - env(safe-area-inset-right) - var(--spacing-md) * 2));
        max-height: calc(100vh - var(--spacing-2xl) * 2);
        margin: 0;
        overflow-x: hidden;
        overflow-y: auto;
        -webkit-overflow-scrolling: touch;
    }

    .main-tab-button {
        text-align: left;
        width: 100%;
        border-left: 3px solid transparent;
        border-bottom: none;
    }

    .main-tab-button.active {
        border-left-color: var(--color-primary);
        border-bottom-color: transparent;
    }
}

.main-tab-button:focus {
    outline: 2px solid var(--color-primary);
    outline-offset: 2px;
}

.main-view-content {
    display: none;
    width: 100%;
    max-width: 100%;
    overflow-x: hidden;
    box-sizing: border-box;
}

.main-view-content.active {
    display: block;
}

/* Feature Description */
.feature-description {
    background-color: var(--bg-secondary);
    border-left: 4px solid var(--color-primary);
    border-radius: var(--radius-sm);
    padding: var(--spacing-md) var(--spacing-md);
    margin-bottom: var(--spacing-md);
    font-size: var(--font-size-sm);
    line-height: var(--line-height-relaxed);
    box-shadow: var(--shadow-xs);
}

.feature-description p {
    margin: 0 0 var(--spacing-sm) 0;
}

.feature-description p:last-child {
    margin-bottom: 0;
}

.feature-description strong {
    color: var(--color-primary);
    font-size: var(--font-size-base);
    font-weight: var(--font-weight-semibold);
}

/* Info Icon */
.info-icon {
    display: inline-block;
    font-size: 12px;
    margin-left: 6px;
    cursor: help;
    opacity: 0.7;
    vertical-align: middle;
    transition: opacity 0.2s;
}

.info-icon:hover {
    opacity: 1;
}

.main-tab-button .info-icon {
    font-size: 11px;
    margin-left: 4px;
}

/* N-gram Controls */
.ngram-controls {
    background-color: var(--bg-primary);
    border: 1px solid var(--border-color-medium);
    border-radius: var(--radius-lg);
    padding: var(--spacing-md);
    margin-bottom: var(--spacing-md);
    box-shadow: var(--shadow-sm);
}

.ngram-control-group {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 20px;
}

.ngram-control-group label {
    font-weight: 500;
    color: #333;
}

.ngram-control-group select {
    padding: 8px 12px;
    border: 1px solid #ddd;
    border-radius: 4px;
    font-size: 14px;
    background-color: #fff;
    cursor: pointer;
}

.ngram-filter-panel {
    border-top: 1px solid #e0e0e0;
    padding-top: 20px;
}

.ngram-filter-panel h4 {
    margin: 0 0 15px 0;
    font-size: 16px;
    color: #333;
}

.filter-checkboxes {
    display: flex;
    flex-direction: column;
    gap: 10px;
    margin-bottom: 15px;
}

.filter-checkboxes label {
    display: flex;
    align-items: center;
    gap: 8px;
    cursor: pointer;
    font-size: 14px;
    color: #555;
}

.filter-checkboxes input[type="checkbox"] {
    width: 18px;
    height: 18px;
    cursor: pointer;
}

.generate-btn {
    background-color: var(--color-primary);
    color: var(--text-inverse);
    border: none;
    padding: var(--spacing-sm) var(--spacing-lg);
    font-size: var(--font-size-base);
    font-weight: var(--font-weight-medium);
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: background-color var(--transition-base), transform var(--transition-fast);
    width: 100%;
}

.generate-btn:hover:not(:disabled) {
    background-color: var(--color-primary-hover);
    transform: translateY(-1px);
}

.generate-btn:active:not(:disabled) {
    transform: translateY(0);
}

.generate-btn:disabled {
    background-color: var(--color-gray-400);
    cursor: not-allowed;
    opacity: 0.65;
}

.generate-btn:focus {
    outline: 2px solid var(--color-primary);
    outline-offset: 2px;
}

/* N-gram Loading and Error */
.ngram-loading {
    text-align: center;
    padding: var(--spacing-2xl);
    color: var(--text-secondary);
}

.ngram-loading .spinner {
    border: 4px solid var(--color-gray-200);
    border-top: 4px solid var(--color-primary);
    border-radius: var(--radius-full);
    width: 40px;
    height: 40px;
    animation: spin 1s linear infinite;
    margin: 0 auto var(--spacing-md);
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

.ngram-error {
    background-color: #ffebee;
    border: 1px solid var(--color-error);
    border-radius: var(--radius-sm);
    padding: var(--spacing-md);
    margin-bottom: var(--spacing-md);
    color: var(--color-error);
    box-shadow: var(--shadow-xs);
}

/* N-gram Visualization */
.ngram-visualization {
    background-color: var(--bg-primary);
    border: 1px solid var(--border-color-medium);
    border-radius: var(--radius-lg);
    padding: var(--spacing-md);
    margin-bottom: var(--spacing-md);
    min-height: 300px;
    overflow: auto;
    position: relative;
    box-shadow: var(--shadow-sm);
}

.ngram-visualization-controls {
    position: absolute;
    top: 10px;
    right: 10px;
    display: flex;
    gap: 8px;
    z-index: 100;
    pointer-events: none;
}

.ngram-visualization-controls > * {
    pointer-events: auto;
}

.ngram-expand-btn {
    background-color: rgba(0, 123, 255, 0.9);
    color: var(--text-inverse);
    border: none;
    border-radius: var(--radius-sm);
    width: 32px;
    height: 32px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background-color var(--transition-base), transform var(--transition-fast);
    box-shadow: var(--shadow-md);
    padding: 0;
}

.ngram-expand-btn svg {
    width: 18px;
    height: 18px;
    display: block;
}

.ngram-expand-btn:hover {
    background-color: var(--color-primary);
    transform: scale(1.05);
}

.ngram-expand-btn:active {
    transform: scale(0.95);
}

.ngram-visualization-content {
    width: 100%;
    overflow: auto;
    margin-top: 0;
    position: relative;
    z-index: 1;
}

.ngram-visualization svg {
    display: block;
    margin: 0 auto;
}

.ngram-visualization .bar {
    transition: fill 0.2s ease;
}

.ngram-visualization .bar:hover {
    fill: var(--color-primary-hover);
}

/* Modal Overlay */
.ngram-modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.75);
    z-index: var(--z-index-modal-backdrop);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-md);
    animation: fadeIn var(--transition-base);
}

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

.ngram-modal-content {
    background-color: var(--bg-primary);
    border-radius: var(--radius-lg);
    width: 100%;
    max-width: 95vw;
    max-height: 95vh;
    display: flex;
    flex-direction: column;
    box-shadow: var(--shadow-xl);
    animation: slideUp var(--transition-slow);
}

@keyframes slideUp {
    from {
        transform: translateY(var(--spacing-md));
        opacity: 0;
    }
    to {
        transform: translateY(0);
        opacity: 1;
    }
}

.ngram-modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-md) var(--spacing-md);
    background-color: var(--bg-secondary);
    border-bottom: 1px solid var(--border-color-medium);
    border-radius: var(--radius-lg) var(--radius-lg) 0 0;
}

.ngram-modal-header h3 {
    margin: 0;
    font-size: var(--font-size-lg);
    color: var(--text-primary);
    font-weight: var(--font-weight-semibold);
}

.ngram-modal-close {
    background-color: var(--color-error);
    color: var(--text-inverse);
    border: none;
    border-radius: var(--radius-sm);
    width: 32px;
    height: 32px;
    font-size: var(--font-size-2xl);
    line-height: 1;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background-color var(--transition-base), transform var(--transition-fast);
}

.ngram-modal-close:hover {
    background-color: var(--color-error-hover);
    transform: scale(1.05);
}

.ngram-modal-close:focus {
    outline: 2px solid var(--color-error);
    outline-offset: 2px;
}

.ngram-modal-body {
    flex: 1;
    overflow: auto;
    padding: var(--spacing-md);
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 400px;
}

@media (max-width: 767px) {
    .ngram-modal-overlay {
        padding: 10px;
        align-items: flex-start;
        padding-top: 5vh;
    }
    
    .ngram-modal-content {
        max-width: 100vw;
        max-height: 85vh;
        border-radius: 8px;
    }
    
    .ngram-modal-header {
        border-radius: 8px 8px 0 0;
        padding: 12px 15px;
    }
    
    .ngram-modal-header h3 {
        font-size: 16px;
    }
    
    .ngram-modal-close {
        width: 28px;
        height: 28px;
        font-size: 20px;
    }
    
    .ngram-modal-body {
        padding: 10px;
        min-height: 200px;
        max-height: calc(85vh - 60px);
        overflow-y: auto;
    }
}

/* N-gram List */
.ngram-list {
    background-color: var(--bg-primary);
    border: 1px solid var(--border-color-medium);
    border-radius: var(--radius-lg);
    padding: var(--spacing-md);
    overflow-x: auto;
    box-shadow: var(--shadow-sm);
}

.ngram-table {
    width: 100%;
    border-collapse: collapse;
    font-size: var(--font-size-sm);
}

.ngram-table th {
    background-color: var(--color-gray-100);
    padding: var(--spacing-sm);
    text-align: left;
    font-weight: var(--font-weight-semibold);
    color: var(--text-primary);
    border-bottom: 2px solid var(--border-color-medium);
}

.ngram-table td {
    padding: var(--spacing-sm) var(--spacing-sm);
    border-bottom: 1px solid var(--border-color-light);
}

.ngram-table tr:hover {
    background-color: var(--color-gray-50);
}

.ngram-table tr:last-child td {
    border-bottom: none;
}

/* Wordcloud Styles */
.wordcloud-controls {
    background-color: var(--bg-primary);
    border: 1px solid var(--border-color-medium);
    border-radius: var(--radius-lg);
    padding: var(--spacing-md);
    margin-bottom: var(--spacing-md);
    box-shadow: var(--shadow-sm);
}

.wordcloud-filter-panel {
    border-top: 1px solid #e0e0e0;
    padding-top: 20px;
}

.wordcloud-filter-panel h4 {
    margin: 0 0 15px 0;
    font-size: 16px;
    color: #333;
}

.wordcloud-advanced-filters {
    display: flex;
    flex-direction: column;
    gap: 15px;
    margin-bottom: 15px;
    padding-top: 15px;
    border-top: 1px solid #e0e0e0;
}

.filter-input-group {
    display: flex;
    align-items: center;
    gap: 12px;
}

.filter-input-group label {
    font-weight: 500;
    color: #333;
    min-width: 140px;
    font-size: 14px;
}

.filter-input-group input[type="number"] {
    padding: 8px 12px;
    border: 1px solid #ddd;
    border-radius: 4px;
    font-size: 14px;
    width: 100px;
}

.wordcloud-loading {
    text-align: center;
    padding: var(--spacing-2xl);
    color: var(--text-secondary);
}

.wordcloud-loading .spinner {
    border: 4px solid var(--color-gray-200);
    border-top: 4px solid var(--color-primary);
    border-radius: var(--radius-full);
    width: 40px;
    height: 40px;
    animation: spin 1s linear infinite;
    margin: 0 auto var(--spacing-md);
}

.wordcloud-error {
    background-color: #ffebee;
    border: 1px solid var(--color-error);
    border-radius: var(--radius-sm);
    padding: var(--spacing-md);
    margin-bottom: var(--spacing-md);
    color: var(--color-error);
    box-shadow: var(--shadow-xs);
}

.wordcloud-container {
    background-color: var(--bg-primary);
    border: 1px solid var(--border-color-medium);
    border-radius: var(--radius-lg);
    padding: var(--spacing-md);
    margin-bottom: var(--spacing-md);
    min-height: 300px;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: var(--shadow-sm);
}

.wordcloud-image-wrapper {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 20px;
    width: 100%;
}

.wordcloud-image {
    max-width: 100%;
    height: auto;
    border: 1px solid #e0e0e0;
    border-radius: 4px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

.wordcloud-image-wrapper .download-btn {
    background-color: var(--color-primary);
    color: var(--text-inverse);
    border: none;
    padding: var(--spacing-sm) var(--spacing-lg);
    font-size: var(--font-size-base);
    font-weight: var(--font-weight-medium);
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: background-color var(--transition-base), transform var(--transition-fast);
}

.wordcloud-image-wrapper .download-btn:hover {
    background-color: var(--color-primary-hover);
    transform: translateY(-1px);
}

/* KWIC Styles */
.kwic-controls {
    background-color: var(--bg-primary);
    border: 1px solid var(--border-color-medium);
    border-radius: var(--radius-lg);
    padding: var(--spacing-md);
    margin-bottom: var(--spacing-md);
    box-shadow: var(--shadow-sm);
}

.kwic-control-group {
    display: flex;
    align-items: center;
    gap: 15px;
    margin-bottom: 15px;
}

.kwic-control-group label {
    font-weight: 500;
    min-width: 120px;
    color: #333;
}

.kwic-control-group input[type="text"],
.kwic-control-group input[type="number"] {
    flex: 1;
    padding: 10px 12px;
    border: 1px solid #ddd;
    border-radius: 4px;
    font-size: 14px;
    max-width: 300px;
}

.kwic-control-group input[type="text"]:focus,
.kwic-control-group input[type="number"]:focus {
    outline: none;
    border-color: #4363d8;
    box-shadow: 0 0 0 2px rgba(67, 99, 216, 0.1);
}

.kwic-filter-panel {
    margin-top: 20px;
    padding-top: 20px;
    border-top: 1px solid #eee;
}

.kwic-filter-panel h4 {
    margin: 0 0 15px 0;
    font-size: 16px;
    color: #333;
}

.kwic-filter-panel .filter-checkboxes {
    margin-bottom: 15px;
}

.kwic-filter-panel .filter-checkboxes label {
    display: flex;
    align-items: center;
    gap: 8px;
    cursor: pointer;
    padding: 8px 0;
    font-weight: normal;
}

.kwic-filter-panel .filter-input-group {
    margin-bottom: 15px;
}

.kwic-filter-panel .filter-input-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 500;
    color: #333;
}

.kwic-filter-panel .filter-input-group select {
    width: 100%;
    max-width: 400px;
    padding: 10px 12px;
    border: 1px solid #ddd;
    border-radius: 4px;
    font-size: 14px;
    background-color: #fff;
    cursor: pointer;
}

.kwic-filter-panel .filter-input-group select:focus {
    outline: none;
    border-color: var(--border-color-focus);
    box-shadow: 0 0 0 3px rgba(0, 123, 255, 0.1);
}

.kwic-loading {
    text-align: center;
    padding: var(--spacing-2xl);
    color: var(--text-secondary);
}

.kwic-loading .spinner {
    border: 4px solid var(--color-gray-200);
    border-top: 4px solid var(--color-primary);
    border-radius: var(--radius-full);
    width: 40px;
    height: 40px;
    animation: spin 1s linear infinite;
    margin: 0 auto var(--spacing-md);
}

.kwic-error {
    background-color: #ffebee;
    border: 1px solid var(--color-error);
    border-radius: var(--radius-sm);
    padding: var(--spacing-md);
    margin-bottom: var(--spacing-md);
    color: var(--color-error);
    box-shadow: var(--shadow-xs);
}

.kwic-results {
    background-color: var(--bg-primary);
    border: 1px solid var(--border-color-medium);
    border-radius: var(--radius-lg);
    padding: var(--spacing-md);
    margin-bottom: var(--spacing-md);
    box-shadow: var(--shadow-sm);
}

.kwic-header {
    margin-bottom: 20px;
    padding-bottom: 15px;
    border-bottom: 2px solid #eee;
}

.kwic-header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 15px;
}

.kwic-header h3 {
    margin: 0;
    font-size: 18px;
    color: #333;
}

.kwic-header-actions {
    display: flex;
    gap: 10px;
}

.kwic-action-btn {
    padding: 8px 16px;
    background-color: #4363d8;
    color: white;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    font-size: 14px;
    transition: background-color 0.2s;
}

.kwic-action-btn:hover {
    background-color: #3651b8;
}

.kwic-action-btn:active {
    background-color: #2a3f94;
}

.kwic-expand-btn {
    background-color: rgba(67, 99, 216, 0.9);
    color: white;
    border: none;
    border-radius: 4px;
    width: 32px;
    height: 32px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background-color 0.2s ease, transform 0.1s ease;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
    padding: 0;
}

.kwic-expand-btn svg {
    width: 18px;
    height: 18px;
    display: block;
}

.kwic-expand-btn:hover {
    background-color: rgba(54, 81, 179, 1);
    transform: scale(1.05);
}

.kwic-expand-btn:active {
    transform: scale(0.95);
}

/* KWIC Modal Overlay */
.kwic-modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.75);
    z-index: var(--z-index-modal-backdrop);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-md);
    animation: fadeIn var(--transition-base);
}

.kwic-modal-content {
    background-color: var(--bg-primary);
    border-radius: var(--radius-lg);
    width: 100%;
    max-width: 95vw;
    max-height: 95vh;
    display: flex;
    flex-direction: column;
    box-shadow: var(--shadow-xl);
    animation: slideUp var(--transition-slow);
}

.kwic-modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-md) var(--spacing-md);
    background-color: var(--bg-secondary);
    border-bottom: 1px solid var(--border-color-medium);
    border-radius: var(--radius-lg) var(--radius-lg) 0 0;
}

.kwic-modal-header h3 {
    margin: 0;
    font-size: var(--font-size-lg);
    color: var(--text-primary);
    font-weight: var(--font-weight-semibold);
}

.kwic-modal-close {
    background-color: var(--color-error);
    color: var(--text-inverse);
    border: none;
    border-radius: var(--radius-sm);
    width: 32px;
    height: 32px;
    font-size: var(--font-size-2xl);
    line-height: 1;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background-color var(--transition-base), transform var(--transition-fast);
}

.kwic-modal-close:hover {
    background-color: var(--color-error-hover);
    transform: scale(1.05);
}

.kwic-modal-close:focus {
    outline: 2px solid var(--color-error);
    outline-offset: 2px;
}

.kwic-modal-body {
    flex: 1;
    overflow: auto;
    padding: var(--spacing-md);
    min-height: 400px;
}

.kwic-table-container {
    overflow-x: auto;
    margin-bottom: var(--spacing-md);
    border: 1px solid var(--border-color-medium);
    border-radius: var(--radius-sm);
    box-shadow: var(--shadow-xs);
}

.kwic-table {
    width: 100%;
    border-collapse: collapse;
    font-family: 'Courier New', Courier, monospace;
    font-size: var(--font-size-sm);
    background-color: var(--bg-primary);
}

.kwic-table thead {
    background-color: var(--bg-secondary);
    border-bottom: 2px solid var(--border-color-medium);
}

.kwic-table th {
    padding: var(--spacing-sm) var(--spacing-sm);
    text-align: left;
    font-weight: var(--font-weight-semibold);
    color: var(--text-primary);
    font-size: var(--font-size-sm);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.kwic-table td {
    padding: var(--spacing-sm) var(--spacing-sm);
    border-bottom: 1px solid var(--color-gray-200);
    vertical-align: top;
    word-break: break-word;
}

.kwic-table-row:hover {
    background-color: var(--bg-secondary);
}

.kwic-table-row:last-child td {
    border-bottom: none;
}

.kwic-col-line {
    width: 60px;
    text-align: center;
    color: var(--text-secondary);
    font-weight: var(--font-weight-medium);
    background-color: var(--bg-secondary);
}

.kwic-table thead .kwic-col-line {
    background-color: var(--color-gray-200);
}

.kwic-col-left {
    text-align: right;
    color: var(--text-secondary);
    padding-right: var(--spacing-md);
    max-width: 300px;
}

.kwic-col-keyword {
    text-align: center;
    min-width: 100px;
    max-width: 250px;
    width: 150px;
    background-color: #f0f4ff;
    font-weight: bold;
    position: relative;
}

.kwic-keyword-text {
    display: inline-block;
    padding: 4px 8px;
    background-color: #e3ebff;
    border-radius: 4px;
    color: #4363d8;
    font-size: 15px;
    border: 1px solid #c5d4ff;
}

.kwic-col-right {
    text-align: left;
    color: #666;
    padding-left: 15px;
}

.kwic-col-actions {
    width: 80px;
    text-align: center;
}

.kwic-copy-line-btn {
    background: none;
    border: none;
    cursor: pointer;
    font-size: 16px;
    padding: 4px 8px;
    border-radius: 4px;
    transition: background-color 0.2s;
    opacity: 0.6;
}

.kwic-copy-line-btn:hover {
    background-color: #e9ecef;
    opacity: 1;
}

.kwic-pagination {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-top: 20px;
    padding-top: 15px;
    border-top: 1px solid #eee;
    flex-wrap: wrap;
    gap: 15px;
}

.kwic-pagination-info {
    color: #666;
    font-size: 14px;
}

.kwic-pagination-controls {
    display: flex;
    align-items: center;
    gap: 8px;
}

.kwic-pagination-btn {
    padding: 6px 12px;
    background-color: #fff;
    border: 1px solid #ddd;
    border-radius: 4px;
    cursor: pointer;
    font-size: 14px;
    transition: all 0.2s;
}

.kwic-pagination-btn:hover:not(:disabled) {
    background-color: #f8f9fa;
    border-color: #4363d8;
}

.kwic-pagination-btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.kwic-pagination-numbers {
    display: flex;
    align-items: center;
    gap: 4px;
}

.kwic-pagination-number {
    min-width: 32px;
    height: 32px;
    padding: 0 8px;
    background-color: #fff;
    border: 1px solid #ddd;
    border-radius: 4px;
    cursor: pointer;
    font-size: 14px;
    transition: all 0.2s;
}

.kwic-pagination-number:hover {
    background-color: #f8f9fa;
    border-color: #4363d8;
}

.kwic-pagination-number.active {
    background-color: #4363d8;
    color: white;
    border-color: #4363d8;
}

.kwic-pagination-ellipsis {
    padding: 0 4px;
    color: #999;
}

.kwic-empty {
    text-align: center;
    padding: 40px;
    color: #999;
    font-style: italic;
}

/* Liquid glass — floating UI above page content (progressive enhancement) */
@supports ((-webkit-backdrop-filter: blur(1px)) or (backdrop-filter: blur(1px))) {
    .token-popup {
        isolation: isolate;
        background: linear-gradient(
            160deg,
            rgba(52, 52, 60, 0.94) 0%,
            rgba(28, 28, 34, 0.9) 100%
        );
        -webkit-backdrop-filter: blur(14px) saturate(1.25);
        backdrop-filter: blur(14px) saturate(1.25);
        border: 1px solid rgba(255, 255, 255, 0.14);
        box-shadow:
            inset 0 1px 0 rgba(255, 255, 255, 0.12),
            0 10px 36px rgba(0, 0, 0, 0.38);
    }

    .token-popup::after {
        border-color: rgba(34, 34, 38, 0.95) transparent transparent transparent;
    }

    .token-popup.popup-below::after {
        border-color: transparent transparent rgba(34, 34, 38, 0.95) transparent;
    }

    .kwic-modal-content,
    .ngram-modal-content {
        isolation: isolate;
        overflow: hidden;
        background: linear-gradient(
            165deg,
            color-mix(in srgb, var(--bg-primary) 78%, rgba(255, 255, 255, 0.95)) 0%,
            color-mix(in srgb, var(--bg-primary) 48%, rgba(255, 255, 255, 0.38)) 100%
        );
        -webkit-backdrop-filter: blur(20px) saturate(1.4);
        backdrop-filter: blur(20px) saturate(1.4);
        border: 1px solid color-mix(in srgb, var(--border-color-light) 60%, rgba(255, 255, 255, 0.5));
        box-shadow:
            inset 0 1px 0 rgba(255, 255, 255, 0.5),
            inset 0 -1px 0 rgba(0, 0, 0, 0.05),
            0 24px 48px rgba(0, 0, 0, 0.28),
            0 0 0 1px rgba(255, 255, 255, 0.22);
    }

    .kwic-modal-header,
    .ngram-modal-header {
        background: color-mix(in srgb, var(--bg-secondary) 58%, transparent);
        border-bottom-color: color-mix(in srgb, var(--border-color-medium) 55%, transparent);
    }

    .kwic-modal-body,
    .ngram-modal-body {
        background: transparent;
    }
}

/* Metadata Studio */
.metadata-toolbar .metadata-toolbar-actions {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: var(--spacing-sm);
    flex-shrink: 0;
}

.metadata-studio-inner {
    margin-top: var(--spacing-sm);
}

.metadata-error {
    color: #b00020;
    font-size: 0.9rem;
    margin: 0 0 var(--spacing-sm);
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--radius-sm);
    background: color-mix(in srgb, #b00020 8%, var(--bg-primary));
    border: 1px solid color-mix(in srgb, #b00020 25%, transparent);
}

.metadata-rows {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.metadata-row {
    display: grid;
    grid-template-columns: minmax(8rem, 14rem) 1fr auto;
    gap: var(--spacing-sm);
    align-items: start;
    padding: var(--spacing-md);
    border: 1px solid var(--border-color-light);
    border-radius: var(--radius-md);
    background: var(--bg-secondary);
}

.metadata-row .metadata-key {
    width: 100%;
    padding: 0.45rem 0.6rem;
    font-size: 0.9rem;
    border: 1px solid var(--border-color-medium);
    border-radius: var(--radius-sm);
    box-sizing: border-box;
    font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
}

.metadata-row .metadata-value {
    width: 100%;
    min-height: 2.75rem;
    padding: 0.45rem 0.6rem;
    font-size: 0.9rem;
    line-height: 1.4;
    border: 1px solid var(--border-color-medium);
    border-radius: var(--radius-sm);
    resize: vertical;
    box-sizing: border-box;
    font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
}

.metadata-remove-btn {
    padding: 0.45rem 0.75rem;
    font-size: 0.85rem;
    border-radius: var(--radius-sm);
    border: 1px solid var(--border-color-medium);
    background: var(--bg-primary);
    color: var(--text-primary);
    cursor: pointer;
    white-space: nowrap;
}

.metadata-remove-btn:hover,
.metadata-remove-btn:focus-visible {
    border-color: var(--border-color-strong, #999);
    outline: none;
}

.metadata-add-btn {
    margin-top: var(--spacing-sm);
    padding: 0.5rem 1rem;
    font-size: 0.9rem;
    border-radius: var(--radius-md);
    border: 1px dashed var(--border-color-medium);
    background: transparent;
    color: var(--text-primary);
    cursor: pointer;
}

.metadata-add-btn:hover,
.metadata-add-btn:focus-visible {
    border-style: solid;
    border-color: var(--border-color-strong, #999);
    outline: none;
}

@media (max-width: 767px) {
    .metadata-row {
        grid-template-columns: 1fr;
    }

    .metadata-remove-btn {
        justify-self: start;
    }
}