/* ============================================
   Computer Vision Lab — shared styles for all lab pages
   (demo.html, instance-segmentation.html, semantic-segmentation.html, pose-estimation.html)
   Reuses design tokens defined in style.css
   ============================================ */

.demo-main {
    padding: calc(var(--nav-height) + 2rem) 0 4rem;
}

.demo-hero {
    margin-bottom: 1.5rem;
}

/* ---------- Task switcher (cross-links between the 4 lab pages) ---------- */
.task-switcher {
    display: flex;
    flex-wrap: wrap;
    gap: 0.6rem;
    margin-bottom: 2rem;
}

.task-tab {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.55rem 1.1rem;
    border-radius: var(--radius-full);
    font-size: 0.85rem;
    font-weight: 600;
    border: 1px solid var(--border);
    background: var(--bg-card);
    color: var(--text-secondary);
    transition: all var(--transition-fast);
}

.task-tab:hover {
    border-color: var(--accent);
    color: var(--accent);
    background: var(--accent-glow);
}

.task-tab.active {
    background: var(--accent-gradient);
    border-color: transparent;
    color: #fff;
}

/* ---------- Results panel: detected labels list ---------- */
.labels-list {
    margin-bottom: 1.25rem;
}

.label-row {
    display: flex;
    align-items: center;
    gap: 0.6rem;
    padding: 0.4rem 0;
    border-bottom: 1px solid var(--border);
    font-size: 0.82rem;
}

.label-row:last-child {
    border-bottom: none;
}

.label-swatch {
    width: 10px;
    height: 10px;
    border-radius: var(--radius-full);
    flex-shrink: 0;
    border: 1px solid rgba(0, 0, 0, 0.15);
}

.label-name {
    flex: 1;
    color: var(--text-primary);
    text-transform: capitalize;
}

.label-value {
    color: var(--accent);
    font-weight: 700;
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.78rem;
}

.results-empty-hint {
    color: var(--text-tertiary);
    font-size: 0.82rem;
}

.results-subheading {
    font-size: 0.78rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.03em;
    color: var(--text-tertiary);
    margin-bottom: 0.6rem;
}

/* ---------- Privacy banner ---------- */
.privacy-banner {
    display: flex;
    align-items: center;
    gap: 0.65rem;
    background: var(--tag-bg);
    border: 1px solid var(--tag-border);
    color: var(--tag-text);
    padding: 0.85rem 1.1rem;
    border-radius: var(--radius-md);
    font-size: 0.85rem;
    margin-bottom: 2rem;
}

.privacy-banner i {
    flex-shrink: 0;
    font-size: 1rem;
}

/* ---------- Two-column layout ---------- */
.demo-layout {
    display: grid;
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    gap: 1.5rem;
    margin-bottom: 1.5rem;
}

.demo-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    backdrop-filter: blur(12px);
    padding: 1.5rem;
}

/* ---------- Dropzone (sized to match the canvas-stage / webcam preview above it) ---------- */
.dropzone {
    min-height: 260px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    border: 2px dashed var(--border);
    border-radius: var(--radius-md);
    padding: 1.5rem;
    text-align: center;
    cursor: pointer;
    transition: all var(--transition-fast);
    color: var(--text-secondary);
}

.dropzone[hidden] {
    display: none;
}

.dropzone:hover,
.dropzone.dragover {
    border-color: var(--accent);
    background: var(--accent-glow);
    color: var(--accent);
}

.dropzone i {
    font-size: 1.75rem;
    margin-bottom: 0.65rem;
    display: block;
}

.dropzone-hint {
    font-size: 0.75rem;
    color: var(--text-tertiary);
    margin-top: 0.35rem;
}

.demo-input-instructions {
    font-size: 0.85rem;
    color: var(--text-secondary);
    margin: -0.5rem 0 0.85rem;
}

/* ---------- Input options: example image tiles + webcam tile, as equal peers ---------- */
.input-options {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(88px, 1fr));
    gap: 0.75rem;
    margin-top: 1rem;
}

.input-tile {
    position: relative;
    width: 100%;
    height: 92px;
    border-radius: var(--radius-sm);
    overflow: hidden;
    border: 2px solid var(--border);
    cursor: pointer;
    padding: 0;
    background: var(--bg-secondary);
    transition: all var(--transition-fast);
    display: flex;
    align-items: flex-end;
    justify-content: center;
}

.input-tile img {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
}

.input-tile-label {
    position: relative;
    z-index: 1;
    width: 100%;
    padding: 0.3rem 0.4rem;
    font-size: 0.72rem;
    font-weight: 600;
    color: #fff;
    text-align: center;
    background: linear-gradient(to top, rgba(0, 0, 0, 0.75), transparent);
}

.input-tile:hover,
.input-tile.selected {
    border-color: var(--accent);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

/* Webcam tile: same footprint as an example tile, icon-based instead of a thumbnail */
.webcam-tile {
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    background: var(--bg-card);
    color: var(--text-secondary);
}

.webcam-tile .input-tile-icon {
    font-size: 1.6rem;
    background: none;
}

.webcam-tile .input-tile-label {
    position: static;
    background: none;
    padding: 0;
    color: inherit;
    font-size: 0.78rem;
}

.webcam-tile:hover {
    border-color: var(--accent);
    color: var(--accent);
    background: var(--accent-glow);
}

.webcam-tile.active {
    background: var(--accent-gradient);
    border-color: transparent;
    color: #fff;
}

.webcam-tile:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.webcam-tile:disabled:hover {
    border-color: var(--border);
    color: var(--text-secondary);
    background: var(--bg-card);
}

/* ---------- Result / canvas stage ---------- */
.canvas-stage {
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 260px;
    background: var(--bg-secondary);
    border-radius: var(--radius-sm);
    overflow: hidden;
}

.canvas-stage canvas {
    max-width: 100%;
    height: auto;
    display: block;
}

.canvas-stage canvas[hidden] {
    display: none;
}

/* The dropzone lives inside the canvas-stage as its empty state — filling the
   same box the result image/webcam feed will occupy once one is loaded. */
.canvas-stage .dropzone {
    width: 100%;
    height: 100%;
    min-height: 260px;
    border-radius: var(--radius-sm);
}

.webcam-video-source {
    position: absolute;
    width: 1px;
    height: 1px;
    opacity: 0;
    pointer-events: none;
}

.fps-badge[hidden] {
    display: none;
}

.fps-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.3rem;
    padding: 0.15rem 0.6rem;
    border-radius: var(--radius-full);
    background: var(--tag-bg);
    color: var(--tag-text);
    border: 1px solid var(--tag-border);
    font-size: 0.7rem;
    font-weight: 700;
    font-family: 'JetBrains Mono', monospace;
    text-transform: none;
    letter-spacing: 0;
    vertical-align: middle;
}

/* ---------- Visual search: gallery + query box ---------- */
.search-gallery {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(110px, 1fr));
    gap: 0.75rem;
}

.gallery-tile {
    position: relative;
    aspect-ratio: 1;
    border-radius: var(--radius-sm);
    overflow: hidden;
    border: 2px solid var(--border);
    padding: 0;
    cursor: default;
    background: var(--bg-secondary);
    transition: border-color var(--transition-fast), transform var(--transition-fast);
}

.gallery-tile img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
}

.gallery-tile .gallery-label {
    position: absolute;
    left: 0;
    right: 0;
    bottom: 0;
    padding: 0.3rem 0.4rem;
    font-size: 0.7rem;
    font-weight: 600;
    color: #fff;
    text-align: center;
    background: linear-gradient(to top, rgba(0, 0, 0, 0.75), transparent);
}

.gallery-tile .gallery-score {
    position: absolute;
    top: 0.3rem;
    right: 0.3rem;
    padding: 0.15rem 0.4rem;
    border-radius: var(--radius-full);
    background: rgba(0, 0, 0, 0.65);
    color: #fff;
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.68rem;
    font-weight: 700;
    opacity: 0;
    transition: opacity var(--transition-fast);
}

.gallery-tile .gallery-rank {
    position: absolute;
    top: 0.3rem;
    left: 0.3rem;
    padding: 0.15rem 0.45rem;
    border-radius: var(--radius-full);
    background: var(--accent-gradient);
    color: #fff;
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.68rem;
    font-weight: 700;
    opacity: 0;
    transition: opacity var(--transition-fast);
}

.gallery-tile.scored .gallery-score,
.gallery-tile.scored .gallery-rank {
    opacity: 1;
}

.gallery-tile.scored:not(.top-match) .gallery-rank {
    background: rgba(0, 0, 0, 0.65);
}

.gallery-tile.top-match {
    border-color: var(--accent);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.gallery-tile.embedding::after {
    content: '';
    position: absolute;
    inset: 0;
    background: rgba(0, 0, 0, 0.45);
}

.gallery-add-tile {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 0.4rem;
    aspect-ratio: 1;
    border-radius: var(--radius-sm);
    border: 2px dashed var(--border);
    background: none;
    color: var(--text-secondary);
    font-size: 0.72rem;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.gallery-add-tile i {
    font-size: 1.2rem;
}

.gallery-add-tile:hover {
    border-color: var(--accent);
    color: var(--accent);
    background: var(--accent-glow);
}

.search-box {
    display: flex;
    gap: 0.6rem;
    margin-bottom: 0.75rem;
}

.query-chips {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-bottom: 1.25rem;
}

.query-chip {
    padding: 0.35rem 0.8rem;
    border-radius: var(--radius-full);
    border: 1px solid var(--border);
    background: var(--bg-secondary);
    color: var(--text-secondary);
    font-size: 0.78rem;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.query-chip:hover {
    border-color: var(--accent);
    color: var(--accent);
    background: var(--accent-glow);
}

.search-input {
    flex: 1;
    min-width: 0;
    padding: 0.6rem 0.9rem;
    border-radius: var(--radius-full);
    border: 1px solid var(--border);
    background: var(--bg-secondary);
    color: var(--text-primary);
    font-size: 0.85rem;
    font-family: inherit;
}

.search-input:focus {
    outline: none;
    border-color: var(--accent);
}

.search-input::placeholder {
    color: var(--text-tertiary);
}

/* ---------- Download button (background-removal cutout) ---------- */
.download-btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.55rem 1.1rem;
    background: var(--accent-gradient);
    color: #fff;
    border: none;
    border-radius: var(--radius-full);
    font-size: 0.85rem;
    font-weight: 600;
    cursor: pointer;
    transition: opacity var(--transition-fast);
}

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

/* ---------- Controls row ---------- */
.demo-controls-row {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 500px));
    gap: 1.5rem;
    margin-bottom: 2.5rem;
}

.demo-card h3 {
    font-size: 0.95rem;
    font-weight: 700;
    margin-bottom: 1rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--text-primary);
}

.demo-card h3 i {
    color: var(--accent);
}

/* Controls */
.control-row {
    margin-bottom: 1.1rem;
}

.control-row:last-child {
    margin-bottom: 0;
}

.control-label {
    display: flex;
    justify-content: space-between;
    font-size: 0.8rem;
    color: var(--text-secondary);
    margin-bottom: 0.4rem;
}

.control-label span.value {
    color: var(--accent);
    font-weight: 700;
    font-family: 'JetBrains Mono', monospace;
}

input[type="range"] {
    width: 100%;
    accent-color: var(--accent);
    cursor: pointer;
}

.control-checkbox {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.85rem;
    color: var(--text-secondary);
    cursor: pointer;
    margin-bottom: 0.6rem;
}

.control-checkbox input {
    accent-color: var(--accent);
    cursor: pointer;
}

/* Key/value info rows (model info + performance) */
.kv-row {
    display: flex;
    justify-content: space-between;
    align-items: baseline;
    padding: 0.4rem 0;
    border-bottom: 1px solid var(--border);
    font-size: 0.8rem;
}

.kv-row:last-child {
    border-bottom: none;
}

.kv-row .k {
    color: var(--text-tertiary);
}

.kv-row .v {
    color: var(--text-primary);
    font-weight: 600;
    font-family: 'JetBrains Mono', monospace;
    text-align: right;
}

.kv-row .v a {
    color: var(--accent);
}

.backend-pill {
    display: inline-block;
    padding: 0.15rem 0.6rem;
    border-radius: var(--radius-full);
    background: var(--tag-bg);
    color: var(--tag-text);
    border: 1px solid var(--tag-border);
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.75rem;
}

/* ---------- Model load progress ---------- */
.model-load-progress {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    padding: 1.25rem 1.5rem;
    margin-bottom: 1.5rem;
    backdrop-filter: blur(12px);
}

.model-load-progress .progress-label {
    font-size: 0.8rem;
    color: var(--text-secondary);
    margin-bottom: 0.65rem;
    display: flex;
    justify-content: space-between;
}

.progress-track {
    height: 8px;
    background: var(--bg-secondary);
    border-radius: var(--radius-full);
    overflow: hidden;
}

.progress-fill {
    height: 100%;
    background: var(--accent-gradient);
    width: 0%;
    transition: width 0.2s ease-out;
}

.model-error-box {
    display: none;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    background: rgba(220, 38, 38, 0.08);
    border: 1px solid rgba(220, 38, 38, 0.25);
    color: #dc2626;
    padding: 0.85rem 1.1rem;
    border-radius: var(--radius-md);
    font-size: 0.85rem;
    margin-bottom: 1.5rem;
}

.model-error-box.show {
    display: flex;
}

.retry-btn {
    flex-shrink: 0;
    padding: 0.4rem 1rem;
    border-radius: var(--radius-full);
    background: #dc2626;
    color: #fff;
    font-size: 0.8rem;
    font-weight: 600;
    border: none;
    cursor: pointer;
}

/* ---------- Minimal footer ---------- */
.demo-footer {
    padding: 3rem 0;
    border-top: 1px solid var(--border);
    text-align: center;
}

.demo-footer a {
    color: var(--accent);
}

/* ---------- Responsive ---------- */
@media (max-width: 900px) {
    .demo-controls-row {
        grid-template-columns: 1fr;
    }
}

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