/* 
   IVTT Web  Scholar's Codex Theme
   Dark warm palette  Cormorant Garamond + Nunito + Fira Code
    */

:root {
    color-scheme: dark;

    /*  Colour system  */
    --bg-deep: #0c0a12;
    --bg-surface: #15121e;
    --bg-raised: #1d192a;
    --bg-input: #110e1a;
    --bg-hover: #241f33;

    --border-subtle: #2a2539;
    --border-medium: #352f48;
    --border-accent: rgba(201,135,58,0.2);

    --text-primary: #e4dcd0;
    --text-secondary: #9990a8;
    --text-muted: #6b6280;
    --text-code: #d4b896;

    --accent: #c9873a;
    --accent-dim: #a06c2c;
    --accent-hover: #dba04f;
    --accent-glow: rgba(201,135,58,0.13);
    --accent-bg: #2a1f10;

    --success: #5d9a5a;
    --error: #c94040;

    /*  Typography  */
    --font-display: 'Cormorant Garamond', Georgia, 'Times New Roman', serif;
    --font-body: 'Nunito', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-mono: 'Fira Code', 'JetBrains Mono', 'Cascadia Code', monospace;

    /*  Spacing  */
    --space-xs: 0.25rem;
    --space-sm: 0.5rem;
    --space-md: 1rem;
    --space-lg: 1.5rem;
    --space-xl: 2.5rem;

    /*  Radii  */
    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 14px;
}

/*  Reset  */
*, *::before, *::after { box-sizing: border-box; }

html {
    overflow-x: hidden;
}

body {
    margin: 0;
    padding: 0;
    font-family: var(--font-body);
    font-size: 16px;
    line-height: 1.6;
    background: var(--bg-deep);
    color: var(--text-primary);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    overflow-x: hidden;
    max-width: 100vw;
}

/*  Grain overlay for texture  */
.grain-overlay {
    position: fixed;
    inset: 0;
    pointer-events: none;
    z-index: 9999;
    opacity: 0.03;
    background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
    background-size: 256px 256px;
}

/* 
   HERO
    */

.hero {
    padding: var(--space-xl) var(--space-lg) calc(var(--space-xl) + 0.5rem);
    text-align: center;
    background: linear-gradient(180deg, #120f1a 0%, var(--bg-deep) 100%);
    border-bottom: 1px solid var(--border-subtle);
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: -40%;
    left: 50%;
    transform: translateX(-50%);
    width: 700px;
    height: 700px;
    background: radial-gradient(circle, var(--accent-glow) 0%, transparent 65%);
    pointer-events: none;
}

.hero-content {
    position: relative;
    max-width: 720px;
    margin: 0 auto;
}

.hero-title {
    font-family: var(--font-display);
    font-size: clamp(3rem, 8vw, 4.5rem);
    font-weight: 700;
    letter-spacing: 0.04em;
    margin: 0;
    line-height: 1.1;
    color: var(--text-primary);
}

.hero-title-accent {
    color: var(--accent);
    font-style: italic;
    font-weight: 400;
}

.hero-tagline {
    font-family: var(--font-display);
    font-size: 1.25rem;
    font-weight: 400;
    color: var(--text-secondary);
    margin: 0.25rem 0 1rem;
    font-style: italic;
}

.hero-description {
    font-size: 0.95rem;
    color: var(--text-secondary);
    max-width: 560px;
    margin: 0 auto 1.25rem;
    line-height: 1.7;
}

.hero-links {
    display: flex;
    gap: var(--space-sm);
    justify-content: center;
    flex-wrap: wrap;
}

.hero-links a {
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--accent);
    text-decoration: none;
    padding: 0.35rem 0.8rem;
    border: 1px solid var(--border-medium);
    border-radius: var(--radius-sm);
    transition: background 0.2s, border-color 0.2s, color 0.2s;
}

.hero-links a:hover {
    background: var(--accent-bg);
    border-color: var(--accent-dim);
    color: var(--accent-hover);
}

/* 
   MAIN LAYOUT
    */

main {
    max-width: 1200px;
    margin: 0 auto;
    padding: var(--space-lg);
    display: grid;
    gap: var(--space-lg);
    min-width: 0;
    width: 100%;
}

/* 
   PANELS (cards)
    */

.panel {
    background: var(--bg-surface);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-lg);
    padding: var(--space-lg);
    overflow: hidden;
    min-width: 0;
}

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

.panel-header h2 {
    font-family: var(--font-display);
    font-size: 1.5rem;
    font-weight: 600;
    margin: 0;
    color: var(--text-primary);
    transition: color 0.2s;
}

.step-badge {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 28px;
    height: 28px;
    border-radius: 50%;
    background: var(--accent);
    color: var(--bg-deep);
    font-weight: 700;
    font-size: 0.88rem;
    flex-shrink: 0;
}

/* 
   SOURCE SELECTION (Step 1)
    */

.source-grid {
    display: grid;
    grid-template-columns: 1fr auto 1fr;
    gap: var(--space-lg);
    align-items: center;
}

@media (max-width: 640px) {
    .source-grid { grid-template-columns: 1fr; }
}

.source-option label {
    display: block;
    font-weight: 600;
    font-size: 0.95rem;
    margin-bottom: 0.4rem;
    color: var(--text-primary);
}

.source-divider {
    display: flex;
    align-items: center;
    justify-content: center;
}

.source-divider span {
    font-size: 0.88rem;
    font-weight: 600;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.15em;
}

/* Upload button */
.btn-upload {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    width: 100%;
    justify-content: center;
    padding: 0.6rem 1.1rem;
    border: 1px dashed var(--border-medium);
    border-radius: var(--radius-sm);
    background: var(--bg-raised);
    color: var(--text-secondary);
    font-family: var(--font-body);
    font-size: 0.95rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s;
}

.btn-upload:hover {
    border-color: var(--accent-dim);
    color: var(--accent);
    background: var(--accent-bg);
}

/* 
   FORM ELEMENTS
    */

select,
input[type="text"] {
    width: 100%;
    padding: 0.55rem 0.75rem;
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-sm);
    background: var(--bg-input);
    color: var(--text-primary);
    font-family: var(--font-body);
    font-size: 0.95rem;
    transition: border-color 0.2s, box-shadow 0.2s;
    appearance: none;
}

select {
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' fill='%239990a8' viewBox='0 0 16 16'%3E%3Cpath d='M8 11L3 6h10z'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 0.65rem center;
    padding-right: 2rem;
    cursor: pointer;
}

select:focus,
input[type="text"]:focus {
    outline: none;
    border-color: var(--accent-dim);
    box-shadow: 0 0 0 3px var(--accent-glow);
}

textarea {
    width: 100%;
    padding: 0.75rem;
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-sm);
    background: var(--bg-input);
    color: var(--text-primary);
    font-family: var(--font-mono);
    font-size: 0.88rem;
    line-height: 1.55;
    resize: vertical;
    min-height: 240px;
    transition: border-color 0.2s, box-shadow 0.2s;
}

textarea:focus {
    outline: none;
    border-color: var(--accent-dim);
    box-shadow: 0 0 0 3px var(--accent-glow);
}

textarea::placeholder {
    color: var(--text-muted);
    font-style: italic;
}

/* Dark resize handle for textareas */
textarea::-webkit-resizer {
    background: var(--bg-raised);
    border: 2px solid var(--border-medium);
    border-radius: 2px;
}

/* Hints */
.hint {
    font-size: 0.95rem;
    color: var(--text-muted);
    margin: 0.3rem 0 0;
}

.hint code {
    font-family: var(--font-mono);
    font-size: 0.9rem;
    color: var(--text-code);
    background: var(--bg-raised);
    padding: 0.1rem 0.35rem;
    border-radius: 3px;
}

.hint-inline {
    font-size: 0.95rem;
    font-weight: 400;
    color: var(--text-muted);
    margin-left: 0.5rem;
}

/* 
   PRESET GRID
    */

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

.subsection-title {
    font-family: var(--font-display);
    font-size: 1.15rem;
    font-weight: 600;
    color: var(--text-primary);
    margin: 0 0 var(--space-sm);
}

.presets-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(175px, 1fr));
    gap: var(--space-sm);
}

.preset-card {
    display: flex;
    flex-direction: column;
    gap: 0.15rem;
    padding: 0.6rem 0.85rem;
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-md);
    background: var(--bg-raised);
    cursor: pointer;
    text-align: left;
    transition: all 0.2s;
    color: var(--text-secondary);
    font-family: var(--font-body);
    min-width: 0;
    overflow: hidden;
    word-break: break-word;
}

.preset-card:hover {
    border-color: var(--border-medium);
    background: var(--bg-hover);
}

.preset-card.active {
    border-color: var(--accent);
    background: var(--accent-bg);
    box-shadow: 0 0 16px var(--accent-glow), inset 0 0 0 1px rgba(201,135,58,0.08);
}

.preset-card.active .preset-flag { color: var(--accent); }
.preset-card.active .preset-name { color: var(--text-primary); }

.preset-flag {
    font-family: var(--font-mono);
    font-size: 0.88rem;
    font-weight: 500;
    color: var(--text-muted);
}

.preset-name {
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--text-secondary);
    line-height: 1.25;
}

.preset-desc {
    font-size: 0.88rem;
    color: var(--text-muted);
    line-height: 1.4;
}

/* 
   TABS
    */

.detailed-section {
    margin-bottom: var(--space-md);
}

.tabs {
    display: flex;
    gap: 0;
    border-bottom: 1px solid var(--border-subtle);
    margin-bottom: var(--space-md);
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none;
}

.tabs::-webkit-scrollbar { display: none; }

.tab {
    padding: 0.55rem 1rem;
    border: none;
    border-bottom: 2px solid transparent;
    background: none;
    color: var(--text-muted);
    font-family: var(--font-body);
    font-size: 0.92rem;
    font-weight: 600;
    cursor: pointer;
    white-space: nowrap;
    transition: color 0.2s, border-color 0.2s;
}

.tab:hover { color: var(--text-secondary); }

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

/* Tab panels: hidden by default, shown via .active class */
.tab-panel {
    display: none;
}

.tab-panel.active {
    display: block;
    animation: tabFade 0.2s ease;
}

@keyframes tabFade {
    from { opacity: 0; transform: translateY(4px); }
    to   { opacity: 1; transform: translateY(0); }
}

/* 
   OPTION GRID
    */

.option-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
    gap: var(--space-md);
}

.option-group label {
    display: block;
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 0.35rem;
}

.option-group label code {
    font-family: var(--font-mono);
    font-size: 0.82rem;
    color: var(--accent);
    margin-left: 0.3rem;
}

.option-group.full-width {
    grid-column: 1 / -1;
}

/* 
   PAGE SELECTION
    */

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

.selection-row {
    display: grid;
    grid-template-columns: 180px 1fr;
    gap: var(--space-md);
    align-items: center;
    padding: 0.55rem 0.8rem;
    border-radius: var(--radius-sm);
    background: var(--bg-raised);
}

@media (max-width: 560px) {
    .selection-row {
        grid-template-columns: 1fr;
        gap: var(--space-sm);
    }
}

.selection-row label {
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--text-primary);
    margin: 0;
}

.selection-row label code {
    font-family: var(--font-mono);
    font-size: 0.84rem;
    color: var(--accent);
    margin-left: 0.25rem;
}

.sel-controls {
    display: flex;
    gap: var(--space-sm);
}

.sel-controls select { flex: 1; }

/* 
   LOCUS GRID
    */

.locus-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(230px, 1fr));
    gap: var(--space-sm);
}

.locus-item {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    padding: 0.5rem 0.75rem;
    background: var(--bg-raised);
    border-radius: var(--radius-sm);
}

.locus-item select {
    width: auto;
    flex-shrink: 0;
}

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

.locus-label strong {
    font-family: var(--font-mono);
    color: var(--accent);
}

/* 
   TRANSCRIBER
    */

.transcriber-controls {
    display: flex;
    gap: var(--space-sm);
    margin-top: 0.35rem;
}

.transcriber-id-input {
    width: 60px !important;
    text-align: center;
    font-family: var(--font-mono);
    letter-spacing: 0.1em;
}

/* 
   CUSTOM VARIABLE SELECTION
    */

.custom-selection {
    margin-top: var(--space-md);
    padding-top: var(--space-md);
    border-top: 1px solid var(--border-subtle);
}

.custom-selection h4 {
    font-family: var(--font-display);
    font-size: 1rem;
    font-weight: 600;
    margin: 0 0 var(--space-sm);
    color: var(--text-secondary);
}

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

.custom-sel-row input {
    width: 55px;
    text-align: center;
    font-family: var(--font-mono);
}

.custom-sel-row .btn-remove {
    padding: 0.3rem 0.55rem;
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-sm);
    background: none;
    color: var(--error);
    cursor: pointer;
    font-size: 0.88rem;
    transition: border-color 0.2s;
}

.custom-sel-row .btn-remove:hover {
    border-color: var(--error);
}

.btn-sm {
    padding: 0.38rem 0.8rem;
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-sm);
    background: var(--bg-raised);
    color: var(--text-secondary);
    font-family: var(--font-body);
    font-size: 0.9rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s;
}

.btn-sm:hover {
    border-color: var(--accent-dim);
    color: var(--accent);
}

/* 
   ARGS BAR
    */

.args-bar {
    margin-top: var(--space-md);
    padding-top: var(--space-md);
    border-top: 1px solid var(--border-subtle);
}

.args-display label {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.1em;
    display: block;
    margin-bottom: 0.3rem;
}

.args-line {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.6rem 0.9rem;
    background: var(--bg-input);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-sm);
    font-family: var(--font-mono);
    font-size: 0.88rem;
    overflow-x: auto;
    max-width: 100%;
    min-width: 0;
}

.args-prefix,
.args-suffix {
    color: var(--text-muted);
    flex-shrink: 0;
}

.args-line code {
    color: var(--accent);
    font-weight: 500;
    font-family: var(--font-mono);
    flex: 1;
    white-space: nowrap;
    background: none;
    padding: 0;
}

/* CLI Override */
.cli-override {
    margin-top: var(--space-sm);
}

.cli-override summary {
    font-size: 0.92rem;
    font-weight: 600;
    color: var(--text-muted);
    cursor: pointer;
    padding: 0.35rem 0;
    transition: color 0.2s;
}

.cli-override summary:hover { color: var(--accent); }

.cli-override .hint { margin-bottom: 0.5rem; }

.cli-override input {
    font-family: var(--font-mono);
}

/* 
   RUN BAR
    */

.run-bar {
    display: flex;
    align-items: center;
    gap: var(--space-md);
    flex-wrap: wrap;
    padding: var(--space-md) var(--space-lg);
}

.run-actions {
    display: flex;
    gap: var(--space-sm);
    flex-wrap: wrap;
}

.btn-run {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.6rem 1.4rem;
    border: none;
    border-radius: var(--radius-sm);
    background: var(--accent);
    color: var(--bg-deep);
    font-family: var(--font-body);
    font-size: 0.92rem;
    font-weight: 700;
    cursor: pointer;
    transition: background 0.2s, box-shadow 0.2s;
}

.btn-run:hover:not(:disabled) {
    background: var(--accent-hover);
    box-shadow: 0 2px 16px var(--accent-glow);
}

.btn-run:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

.btn-secondary {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    padding: 0.6rem 1rem;
    border: 1px solid var(--border-medium);
    border-radius: var(--radius-sm);
    background: var(--bg-raised);
    color: var(--text-secondary);
    font-family: var(--font-body);
    font-size: 0.92rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s;
}

.btn-secondary:hover:not(:disabled) {
    border-color: var(--accent-dim);
    color: var(--accent);
}

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

/* Status */
.status-text {
    font-size: 0.92rem;
    color: var(--text-muted);
    font-style: italic;
}

.status-text.error {
    color: var(--error);
    font-style: normal;
    font-weight: 600;
}

.status-text.success {
    color: var(--success);
    font-style: normal;
    font-weight: 600;
}

/* 
   WORKSPACE (Input / Output)
    */

.workspace-panes {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-md);
}

.pane-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 0.4rem;
}

.pane-header label {
    font-size: 0.92rem;
    font-weight: 700;
    color: var(--text-primary);
}

.pane-badge {
    font-family: var(--font-mono);
    font-size: 0.88rem;
    color: var(--text-muted);
    background: var(--bg-raised);
    padding: 0.15rem 0.55rem;
    border-radius: 999px;
}

/* 
   LOG PANEL
    */

.log-panel .panel-header {
    cursor: pointer;
    user-select: none;
    margin-bottom: 0;
    transition: opacity 0.2s;
}

.log-panel .panel-header:hover h2 {
    color: var(--accent);
}

/* Disabled state: no interactivity when log is empty */
.log-panel.disabled .panel-header {
    cursor: default;
    opacity: 0.5;
}

.log-panel.disabled .panel-header:hover h2 {
    color: var(--text-primary);
}

.log-panel .chevron-icon {
    color: var(--text-muted);
    transition: transform 0.2s;
    flex-shrink: 0;
}

.log-panel.collapsed .chevron-icon {
    transform: rotate(-90deg);
}

.log-output {
    margin: var(--space-sm) 0 0;
    padding: 0.75rem;
    background: var(--bg-input);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-sm);
    font-family: var(--font-mono);
    font-size: 0.88rem;
    color: var(--text-secondary);
    white-space: pre-wrap;
    word-break: break-word;
    min-height: 2.5rem;
    max-height: 300px;
    overflow-y: auto;
}

/* 
   FOOTER
    */

footer {
    border-top: 1px solid var(--border-subtle);
    margin-top: var(--space-lg);
    padding: var(--space-xl) var(--space-lg);
    background: var(--bg-surface);
}

.footer-content {
    max-width: 1200px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--space-xl);
}

.footer-section h3 {
    font-family: var(--font-display);
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text-primary);
    margin: 0 0 0.5rem;
}

.footer-section p {
    font-size: 0.92rem;
    color: var(--text-secondary);
    margin: 0.3rem 0;
    line-height: 1.55;
}

footer a {
    color: var(--accent);
    text-decoration: none;
    transition: color 0.2s;
}

footer a:hover {
    color: var(--accent-hover);
    text-decoration: underline;
}

/* 
   SCROLLBARS
    */

::-webkit-scrollbar { width: 6px; height: 6px; }
::-webkit-scrollbar-track { background: var(--bg-input); }
::-webkit-scrollbar-thumb { background: var(--border-medium); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: var(--text-muted); }

/* 
   SELECTION
    */

::selection {
    background: var(--accent);
    color: var(--bg-deep);
}

/* 
   RESPONSIVE (MOBILE)
    */

@media (max-width: 768px) {
    main {
        padding: var(--space-md);
        gap: var(--space-md);
    }

    .panel {
        padding: var(--space-md);
    }

    .hero {
        padding: var(--space-lg) var(--space-md);
    }

    .hero-title {
        font-size: clamp(2rem, 10vw, 3rem);
    }

    .hero-description {
        font-size: 0.92rem;
    }

    .hero-links {
        flex-direction: column;
        align-items: center;
    }

    .hero-links a {
        width: 100%;
        max-width: 260px;
        text-align: center;
    }

    .presets-grid {
        grid-template-columns: repeat(auto-fill, minmax(130px, 1fr));
        gap: var(--space-xs);
    }

    .preset-card {
        padding: 0.5rem 0.7rem;
    }

    .option-grid {
        grid-template-columns: 1fr;
    }

    .locus-grid {
        grid-template-columns: 1fr;
    }

    .args-line {
        font-size: 0.85rem;
        padding: 0.5rem 0.7rem;
        flex-wrap: wrap;
    }

    .run-bar {
        flex-direction: column;
        align-items: stretch;
        padding: var(--space-md);
    }

    .run-actions {
        flex-direction: column;
    }

    .run-actions button {
        width: 100%;
        justify-content: center;
    }

    .status-text {
        text-align: center;
    }

    .workspace-panes {
        grid-template-columns: 1fr;
    }

    textarea {
        min-height: 180px;
    }

    .footer-content {
        grid-template-columns: 1fr;
        gap: var(--space-lg);
    }

    .tab {
        padding: 0.5rem 0.75rem;
        font-size: 0.88rem;
    }

    .transcriber-controls {
        flex-direction: column;
    }

    .sel-controls {
        flex-direction: column;
    }
}

@media (max-width: 480px) {
    .presets-grid {
        grid-template-columns: 1fr 1fr;
    }

    .selection-row {
        grid-template-columns: 1fr;
        gap: var(--space-xs);
        padding: 0.5rem 0.65rem;
    }

    .panel-header h2 {
        font-size: 1.25rem;
    }

    .subsection-title {
        font-size: 1rem;
    }

    .custom-sel-row {
        flex-wrap: wrap;
    }
}