/* ============================================================
 *  RoboCloth project-page styles
 *  Layout inspired by OpenIllumination; adapted to our material grid.
 * ============================================================ */

:root {
    --brand: #2b2b2b;
    --accent: #3367d6;
    --accent-soft: #e8efff;
    --muted: #6e7884;
    --bg: #fafbfc;
    --panel: #ffffff;
    --border: #e6e9ee;
    --hover: #f3f6fa;
}

/* Type: Jost (Google Fonts, linked from <head> with display=swap) on the scale of
 * powerfoam.github.io: body copy 18 px / 1.3, section titles 2 rem / 600, sub-headings
 * 1.25 rem / 600, authors 1.25 rem, affiliations and buttons 1 rem, captions 0.95 rem.
 * rem sizes are relative to the 16 px root, so the body bump leaves them alone. */
html, body {
    background: var(--bg);
    color: var(--brand);
    font-family: "Jost", "Segoe UI", "Helvetica Neue", Arial, sans-serif;
    -webkit-font-smoothing: antialiased;
    text-rendering: optimizeLegibility;
}
body {
    font-size: 1.125rem;          /* 18 px */
    line-height: 1.3;
}

/* --------  Header / hero  -------- */

.jumbotron {
    background: linear-gradient(180deg, #ffffff 0%, #f4f6fa 100%);
    padding: 3.5rem 1rem 2rem;
    margin-bottom: 0;
    border-bottom: 1px solid var(--border);
}

.jumbotron h2 {
    font-size: 2rem;              /* the tagline: Power Foam's subtitle.is-3 */
    font-weight: 500;
    line-height: 1.25;
    color: var(--brand);
    letter-spacing: 0;
}

.jumbotron .subtitle {
    color: var(--muted);
    font-size: 1.125rem;
    margin-top: 0.75rem;
}

.author-list {
    margin-top: 1.4rem;
    line-height: 1.6;
    font-size: 1.25rem;           /* Power Foam's .is-size-5 author line */
}
.author-list a { color: var(--accent); text-decoration: none; }
.author-list a:hover { text-decoration: underline; }

.venue {
    font-size: 1.125rem;
    margin: 0.2rem 0 1.4rem;
    color: var(--text, inherit);
}

.author-list .footnote {
    display: inline-block;
    font-size: 1rem;
    opacity: 0.85;
    margin-top: 0.15rem;
}

.affiliations {
    color: var(--muted);
    font-size: 1rem;              /* .is-size-6 affiliations */
    margin-top: 0.5rem;
}

.btn-group-row {
    display: flex;
    justify-content: center;
    gap: 0.75rem;
    flex-wrap: wrap;
    margin: 1.5rem 0 0.5rem;
}

.btn-pill {
    display: inline-flex;
    align-items: center;
    gap: 0.45rem;
    padding: 0.5rem 1.2rem;
    border-radius: 999px;
    background: white;
    color: var(--brand);
    border: 1px solid var(--border);
    text-decoration: none;
    font-size: 1rem;              /* .button.is-normal */
    font-weight: 500;
    transition: all 0.15s ease-in-out;
}

.btn-pill:hover {
    background: var(--accent);
    color: white;
    border-color: var(--accent);
    text-decoration: none;
    transform: translateY(-1px);
    box-shadow: 0 4px 10px rgba(51, 103, 214, 0.15);
}

/* --------  Sections  -------- */

section.page-section {
    padding: 2.5rem 0 1.5rem;
    max-width: 1100px;
    margin: 0 auto;
}

section.page-section h3 {
    font-weight: 600;
    font-size: 2rem;              /* Power Foam's section titles (.title.is-3), all widths */
    line-height: 1.125;
    letter-spacing: 0;
    text-align: center;
    margin-bottom: 0.5rem;
}

section.page-section .section-rule {
    width: 60px;
    height: 3px;
    background: var(--accent);
    border-radius: 2px;
    margin: 0 auto 1.1rem;
}

.lead-text {
    font-size: 1.125rem;
    line-height: 1.45;
    text-align: left;             /* body text: left-aligned, medium weight (Power Foam) */
    font-weight: 500;
    color: #363636;
    padding: 0 1rem;
}

/* --------  Teaser placeholder  -------- */

.teaser-box {
    margin: 0 auto 1.5rem;
    padding: 2rem;
    background: var(--panel);
    border: 1px dashed var(--border);
    border-radius: 8px;
    text-align: center;
    color: var(--muted);
    max-width: 950px;
}
.teaser-box img { max-width: 100%; border-radius: 4px; }

/* Slots for content to be filled later */
.placeholder-slot {
    margin: 1.5rem auto;
    padding: 1.75rem;
    background: var(--panel);
    border: 1px dashed var(--border);
    border-radius: 8px;
    text-align: center;
    color: var(--muted);
    max-width: 950px;
    font-size: 1rem;
}
.placeholder-slot strong { color: var(--brand); }

/* --------  Train / Test split headings + ID pill list  -------- */

.split-heading {
    display: flex;
    align-items: center;
    gap: 0.6rem;
    font-weight: 600;
    font-size: 1.25rem;           /* sub-heading: Power Foam's .title.is-5 */
    color: var(--brand);
    margin: 1.6rem 1rem 0.8rem;
}

.split-chip {
    display: inline-flex;
    align-items: center;
    padding: 0.18rem 0.55rem;
    border-radius: 999px;
    font-size: 0.78rem;
    font-weight: 600;
    letter-spacing: 0.04em;
    text-transform: uppercase;
    color: white;
}
.split-chip.train { background: #3367d6; }   /* blue */
.split-chip.test  { background: #ec4899; }   /* pink */

.split-heading-tail {
    color: var(--muted);
    font-size: 0.95rem;
    font-weight: 500;
    text-transform: none;
    letter-spacing: 0;
}

.id-pill-list {
    display: flex;
    flex-wrap: wrap;
    gap: 0.3rem;
    padding: 0 1rem;
}

.id-pill {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 2.4rem;
    padding: 0.2rem 0.5rem;
    border-radius: 6px;
    background: var(--panel);
    border: 1px solid var(--border);
    font-family: ui-monospace, "SF Mono", Menlo, Consolas, monospace;
    font-size: 0.85rem;
    color: var(--brand);
    text-decoration: none;
    transition: all 0.12s ease;
}
.id-pill:hover {
    background: var(--accent);
    color: white;
    border-color: var(--accent);
    text-decoration: none;
    transform: translateY(-1px);
}

/* --------  Dataset grid  -------- */

.preview-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(170px, 1fr));
    gap: 14px;
    padding: 0 1rem;
}

.material-card {
    background: var(--panel);
    border: 1px solid var(--border);
    border-radius: 10px;
    overflow: hidden;
    cursor: pointer;
    transition: all 0.15s ease-in-out;
    text-decoration: none;
    color: inherit;
    display: flex;
    flex-direction: column;
}

.material-card:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.08);
    border-color: var(--accent);
    text-decoration: none;
    color: inherit;
}

.material-card .thumb-wrap {
    position: relative;
    width: 100%;
    aspect-ratio: 1 / 1;
    background: #0d0f12;
    overflow: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
}

.material-card .thumb-wrap canvas,
.material-card .thumb-wrap img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
}

.material-card .thumb-wrap .loading-spinner {
    position: absolute;
    color: rgba(255,255,255,0.5);
    font-size: 0.8rem;
}

.material-card .card-body {
    padding: 0.55rem 0.7rem;
    text-align: center;
    font-size: 1rem;
}

.material-card .card-id {
    font-weight: 600;
    color: var(--brand);
}

.material-card .card-label {
    color: var(--muted);
    font-size: 0.85rem;
    margin-top: 0.1rem;
}

/* full-ID lists live in a <details>: a heading-styled summary with a chevron */
.id-fold { margin-top: 2.6rem; }
.id-fold > summary { list-style: none; cursor: pointer; margin-top: 0; }
.id-fold > summary::-webkit-details-marker { display: none; }
.id-fold > summary .fold-chevron { font-size: 0.8rem; color: var(--muted); transition: transform 0.15s ease; }
.id-fold[open] > summary .fold-chevron { transform: rotate(90deg); }
.id-fold > summary .split-heading-tail { font-weight: 600; color: var(--brand); }

/* phones: three compact thumbnails per row (two tall cards per row made the preview ~2.4k px) */
@media (max-width: 576px) {
    .preview-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 8px; }
    .material-card { border-radius: 8px; }
    .material-card .card-body { padding: 0.28rem 0.2rem 0.32rem; font-size: 0.82rem; }
    .material-card .card-label, .material-card .card-id-word { display: none; }
    .id-fold { margin-top: 1.8rem; }
}

/* --------  obj.html (material detail)  -------- */
/* The viewer shares the main page's language: Jost, the dark hero pills,
 * white cards with a 1 px border and the results cards' soft shadow,
 * 1.25 rem / 600 sub-headings above each card, body text left-aligned. */

.material-detail {
    max-width: 1280px;
    margin: 0 auto;
    padding: 2rem 1.25rem 0;
}

/* header: title + the two counts on the left, the nav pills on the right */
.detail-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 1rem 1.5rem;
    margin-bottom: 1.75rem;
}
.detail-header h1 {
    margin: 0;
    font-size: 2rem;                  /* the main page's section titles */
    font-weight: 600;
    line-height: 1.125;
    letter-spacing: 0;
    color: var(--brand);
}
/* the main page's section rule, left-aligned under the title */
.detail-header h1::after {
    content: "";
    display: block;
    width: 60px;
    height: 3px;
    margin-top: 0.5rem;
    background: var(--accent);
    border-radius: 2px;
}
.detail-header h1 .split-chip {
    vertical-align: 0.4em;
    margin-left: 0.45rem;
}
.detail-header h1 .split-chip[hidden] { display: none; }
.detail-header .subtitle {
    margin: 0.7rem 0 0;
    font-size: 1.125rem;              /* body text: Jost 500, dark */
    font-weight: 500;
    line-height: 1.3;
    color: #363636;
}
.detail-header .subtitle b { font-weight: 600; }

/* nav: the hero pills (arXiv · Paper · Code · Dataset), one step smaller */
.detail-nav {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem 0.6rem;
}
.detail-nav .hero-btn {
    padding: 0.5rem 1.15rem;
    font-size: 1rem;
    border: 0;                        /* Prev / Next are <button>s */
    font-family: inherit;
    cursor: pointer;
}
.detail-nav .hero-btn .hero-ico { font-size: 1em; }
.detail-nav .hero-btn:focus { outline: none; }
.detail-nav .hero-btn:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }
.detail-nav .hero-btn:disabled {
    background: #a9adb5;              /* as the main page's pending pills */
    cursor: default;
    transform: none;
}
.detail-nav .lbl-short { display: none; }

/* two columns: the capture + sliders, the 3-D scenes + info */
.detail-grid {
    display: grid;
    grid-template-columns: minmax(0, 1fr) 360px;
    gap: 1.75rem 1.5rem;
    align-items: start;
}
.left-column,
.right-column {
    display: flex;
    flex-direction: column;
    gap: 1.75rem;
    min-width: 0;
}
@media (max-width: 980px) {
    .detail-grid { grid-template-columns: 1fr; }
}

/* a sub-heading above each card, as the main page's h4 above its cards */
.panel-title {
    margin: 0 0 0.6rem;
    font-size: 1.25rem;
    font-weight: 600;
    line-height: 1.25;
    color: var(--brand);
    text-align: left;
}

/* the cards: the results cards' treatment */
.image-panel,
.slider-panel,
.viz-panel,
.info-panel {
    background: var(--panel);
    border: 1px solid var(--border);
    border-radius: 10px;
    box-shadow: 0 1px 2px rgba(20, 30, 50, 0.04), 0 8px 24px rgba(20, 30, 50, 0.05);
    overflow: hidden;
}

/* --- the capture --- */

.image-panel .image-wrap {
    aspect-ratio: 3 / 2;
    background: #000;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
}
.image-panel .image-wrap canvas,
.image-panel .image-wrap img {
    max-width: 100%;
    max-height: 100%;
    width: 100%;
    height: 100%;
    object-fit: contain;
    display: block;
}

/* Loading badge over the capture: the previous frame stays visible
   (slightly dimmed) while the next one downloads / decodes. */
.image-panel .image-wrap .img-loading {
    position: absolute;
    left: 0.6rem;
    top: 0.6rem;
    display: none;
    align-items: center;
    max-width: calc(100% - 1.2rem);
    padding: 0.25rem 0.6rem;
    border-radius: 999px;
    background: rgba(13, 15, 18, 0.72);
    color: #e8eaee;
    font-size: 0.8rem;
    line-height: 1.3;
    font-variant-numeric: tabular-nums;
    white-space: nowrap;
    pointer-events: none;
}
.image-panel .image-wrap.is-loading .img-loading { display: inline-flex; }
.image-panel .image-wrap.is-loading canvas { opacity: 0.82; }
.image-panel .image-wrap canvas { transition: opacity 0.2s; }
.image-panel .image-wrap .img-loading .spinner {
    width: 10px;
    height: 10px;
    margin-right: 0.4rem;
    border-color: rgba(255, 255, 255, 0.35);
    border-top-color: #fff;
}
/* Nothing painted yet: the same badge, centred and larger. */
.image-panel .image-wrap.is-empty .img-loading {
    left: 50%;
    top: 50%;
    transform: translate(-50%, -50%);
    padding: 0.45rem 0.95rem;
    font-size: 0.95rem;
}
.image-panel .image-wrap.is-empty .img-loading .spinner { width: 12px; height: 12px; }
/* Download progress along the bottom edge of the image. */
.image-panel .image-wrap .img-progress {
    position: absolute;
    left: 0;
    right: 0;
    bottom: 0;
    height: 3px;
    background: rgba(255, 255, 255, 0.12);
    opacity: 0;
    transition: opacity 0.2s;
    pointer-events: none;
}
.image-panel .image-wrap .img-progress i {
    display: block;
    height: 100%;
    background: var(--accent);
    transform: scaleX(0);
    transform-origin: left center;
    transition: transform 0.15s linear;
}
.image-panel .image-wrap.is-loading.has-progress .img-progress { opacity: 1; }

/* the file name and the pose under the capture: one mono chip style */
.image-panel .image-meta {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 0.5rem 1.25rem;
    padding: 0.7rem 1rem;
    border-top: 1px solid var(--border);
    font-size: 0.95rem;
    color: var(--muted);
}
.image-panel .image-meta .meta-file,
.image-panel .image-meta .meta-pose {
    display: inline-flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 0.35rem;
    min-width: 0;
}
.image-panel .image-meta .meta-k { margin-left: 0.5rem; }
.image-panel .image-meta .meta-k:first-child { margin-left: 0; }
.image-panel .image-meta code,
.material-info code {
    font-family: ui-monospace, "SF Mono", Menlo, Consolas, monospace;
    font-size: 0.85rem;
    line-height: 1.4;
    color: var(--brand);
    background: var(--hover);
    border: 1px solid var(--border);
    border-radius: 6px;
    padding: 0.08rem 0.5rem;
    white-space: nowrap;
}
.image-panel .image-meta .spinner { margin-right: 0.15rem; }

/* --- the sliders --- */

.slider-panel { padding: 1.1rem 1.25rem 1.25rem; }

.slider-group { margin-bottom: 1.15rem; }

.slider-group .slider-label {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 0.75rem;
    margin: 0 0 0.4rem;
    font-size: 1.05rem;
    font-weight: 600;
    line-height: 1.25;
    color: var(--brand);
    cursor: pointer;
}

/* value chips: small, rounded, the accent tint */
.value-tag {
    display: inline-flex;
    align-items: center;
    padding: 0.1rem 0.6rem;
    border-radius: 999px;
    background: var(--accent-soft);
    color: var(--accent);
    font-size: 0.85rem;
    font-weight: 600;
    line-height: 1.4;
    font-variant-numeric: tabular-nums;
    white-space: nowrap;
}

/* one range style: a slim track with the accent fill (--p, set by obj.html)
   and a white thumb with an accent ring; hover / focus widen the ring */
.slider-group input[type="range"] {
    --p: 0;
    -webkit-appearance: none;
    appearance: none;
    display: block;
    width: 100%;
    height: 22px;
    margin: 0;
    padding: 0;
    background: transparent;
    cursor: pointer;
}
.slider-group input[type="range"]:focus { outline: none; }
.slider-group input[type="range"]::-webkit-slider-runnable-track {
    height: 6px;
    border-radius: 3px;
    background: linear-gradient(to right,
        var(--accent) 0, var(--accent) calc(9px + (100% - 18px) * var(--p)),
        var(--border) calc(9px + (100% - 18px) * var(--p)), var(--border) 100%);
}
.slider-group input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none;
    width: 18px;
    height: 18px;
    margin-top: -6px;
    border-radius: 50%;
    background: #fff;
    border: 2px solid var(--accent);
    box-shadow: 0 1px 3px rgba(20, 30, 50, 0.2);
    transition: box-shadow 0.15s ease-in-out, transform 0.15s ease-in-out;
}
.slider-group input[type="range"]:hover::-webkit-slider-thumb,
.slider-group input[type="range"]:focus-visible::-webkit-slider-thumb {
    box-shadow: 0 0 0 5px var(--accent-soft), 0 1px 3px rgba(20, 30, 50, 0.2);
}
.slider-group input[type="range"]:active::-webkit-slider-thumb {
    background: var(--accent);
    transform: scale(1.08);
    cursor: grabbing;
}
.slider-group input[type="range"]::-moz-range-track {
    height: 6px;
    border-radius: 3px;
    background: var(--border);
}
.slider-group input[type="range"]::-moz-range-progress {
    height: 6px;
    border-radius: 3px;
    background: var(--accent);
}
.slider-group input[type="range"]::-moz-range-thumb {
    width: 14px;
    height: 14px;
    border-radius: 50%;
    background: #fff;
    border: 2px solid var(--accent);
    box-shadow: 0 1px 3px rgba(20, 30, 50, 0.2);
}
.slider-group input[type="range"]:hover::-moz-range-thumb,
.slider-group input[type="range"]:focus-visible::-moz-range-thumb {
    box-shadow: 0 0 0 5px var(--accent-soft), 0 1px 3px rgba(20, 30, 50, 0.2);
}

/* the buttons under the sliders: the main page's white pills, one step smaller */
.controls-row {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem 0.6rem;
    margin-top: 1.35rem;
}
.material-detail .btn-pill {
    padding: 0.4rem 1rem;
    font-size: 0.95rem;
    line-height: 1.3;
    gap: 0.45rem;
    font-family: inherit;
    cursor: pointer;
}
.material-detail .btn-pill i { font-size: 0.95em; }
.material-detail .btn-pill:focus { outline: none; }
.material-detail .btn-pill:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }
.material-detail .btn-pill.active {
    background: var(--accent);
    color: #fff;
    border-color: var(--accent);
}

/* --- the 3-D scenes (their dark canvases: css/viz3d.css) --- */

.viz-panel canvas {
    display: block;
    width: 100%;
    aspect-ratio: 1 / 1;
}
.right-column .note { margin: 0.9rem 0 0; }
.right-column .note:last-child { margin-bottom: 0; }

/* --- phones --- */

@media (max-width: 576px) {
    .material-detail { padding: 1.25rem 1rem 0; }
    .detail-header { gap: 0.9rem; margin-bottom: 1.25rem; }
    .detail-header h1 { font-size: 1.5rem; }
    .detail-header h1::after { width: 48px; margin-top: 0.4rem; }
    .detail-header .subtitle { font-size: 1rem; margin-top: 0.55rem; }
    .detail-nav { gap: 0.4rem 0.45rem; width: 100%; }
    .detail-nav .hero-btn { padding: 0.42rem 0.95rem; font-size: 0.95rem; gap: 0.45rem; }
    .detail-nav .lbl-long { display: none; }
    .detail-nav .lbl-short { display: inline; }
    .detail-grid { gap: 1.5rem; }
    .left-column, .right-column { gap: 1.5rem; }
    .panel-title { font-size: 1.15rem; }
    .image-panel .image-meta { padding: 0.6rem 0.8rem; font-size: 0.9rem; }
    .slider-panel { padding: 1rem 1rem 1.1rem; }
    .slider-group .slider-label { font-size: 1rem; }
    .material-detail .btn-pill { padding: 0.38rem 0.85rem; font-size: 0.92rem; }
}

/* --------  Footer  -------- */

footer {
    margin-top: 2rem;
    padding: 1.5rem 0;
    text-align: center;
    color: var(--muted);
    font-size: 1rem;
    border-top: 1px solid var(--border);
}
footer a { color: var(--accent); text-decoration: none; }

/* --------  Material info panel (obj.html)  -------- */

.material-info {
    padding: 0.9rem 1.1rem 1rem;
    font-size: 0.95rem;
    line-height: 1.5;
}

.material-info .info-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 0.75rem;
    padding: 0.25rem 0;
}
.material-info .info-row.info-row-block {
    flex-direction: column;
    align-items: stretch;
    gap: 0.4rem;
    margin-top: 0.6rem;
    padding-top: 0.75rem;
    border-top: 1px solid var(--border);
}

/* labels: the results table's column-header style */
.material-info .info-label {
    color: var(--muted);
    font-size: 0.78rem;
    font-weight: 600;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    line-height: 1.25;
}

.material-info .info-value {
    color: var(--brand);
    font-weight: 500;
    display: inline-flex;
    align-items: center;
    gap: 0.45rem;
    font-variant-numeric: tabular-nums;
}

.material-info .color-swatch {
    display: inline-block;
    width: 18px;
    height: 18px;
    border-radius: 4px;
    background: #555;
    border: 1px solid var(--border);
    vertical-align: middle;
}

/* Per-channel BRDF range bars.
 * Each bar's full line is the 0..65 535 capture range; the channel-
 * coloured centre segment is the actual non-zero data range for that
 * channel. Values appear inline to the right of the bar — no absolute
 * positioning floating over neighbouring rows. */

.material-info .channel-bar {
    display: grid;
    grid-template-columns: 14px minmax(0, 1fr) auto;
    align-items: center;
    gap: 0.45rem;
    font-size: 0.78rem;
    line-height: 1;
}

.material-info .channel-label {
    font-weight: 700;
    font-family: ui-monospace, "SF Mono", Menlo, Consolas, monospace;
    font-size: 0.85rem;
    text-align: center;
}

/* Channel colours: applied to the label text, the bar fill, and the
 * inline range numbers via the .ch-r/.ch-g/.ch-b modifier on the row. */
.material-info .ch-r { --ch: #dc2626; }
.material-info .ch-g { --ch: #16a34a; }
.material-info .ch-b { --ch: #2563eb; }
.material-info .channel-bar { color: var(--ch); }

.material-info .channel-track {
    position: relative;
    height: 6px;
    background: var(--border);
    border-radius: 3px;
}

.material-info .channel-fill {
    position: absolute;
    top: 0;
    bottom: 0;
    min-width: 2px;
    background: var(--ch);
    border-radius: 3px;
    transition: left 0.15s ease, width 0.15s ease;
}

.material-info .channel-range {
    font-family: ui-monospace, "SF Mono", Menlo, Consolas, monospace;
    font-size: 0.78rem;
    white-space: nowrap;
    color: var(--ch);
}
.material-info .channel-range code {
    background: transparent;
    border: 0;
    padding: 0;
    color: inherit;
    font-size: inherit;
    line-height: inherit;
}
.material-info .channel-range .dash {
    margin: 0 0.2rem;
    color: var(--muted);
}

.material-info .channel-axis {
    display: flex;
    justify-content: space-between;
    font-size: 0.72rem;
    color: var(--muted);
    /* match the track's left edge (label is 14px + 0.45rem gap = ~21px) */
    padding: 0 0 0 calc(14px + 0.45rem);
    margin-top: 0.1rem;
    line-height: 1;
}

/* --------  Inline status / spinner  -------- */

.status-line {
    text-align: center;
    color: var(--muted);
    font-size: 1rem;
    padding: 0.5rem;
}
.spinner {
    display: inline-block;
    width: 14px; height: 14px;
    border: 2px solid #d1d5db;
    border-top-color: var(--accent);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
    vertical-align: -3px;
    margin-right: 0.45rem;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* --------  Citation block  -------- */

.citation-block {
    background: #f2f4f8;
    padding: 1.1rem 1.4rem;
    border-radius: 8px;
    font-family: ui-monospace, "SF Mono", Menlo, Consolas, monospace;
    font-size: 0.95rem;
    overflow-x: auto;
    white-space: pre;
    color: #2d2d2d;
}

/* --------  Launch (teaser) video, right under the hero  -------- */

.launch-section {
    max-width: 1132px;          /* 1100 px video + 2 x 1rem gutter */
    margin: 0 auto;
    padding: 1.75rem 1rem 0.25rem;
}
.launch-video-wrap { position: relative; }
#launch-video {
    display: block;
    width: 100%;
    height: auto;
    aspect-ratio: 16 / 9;
    border-radius: 8px;
    background: #000;
}

/* "Sound on" pill in a row under the muted autoplaying launch video (kept out of the
   frame so it never covers the video's own on-screen labels). */
.launch-tools { display: flex; justify-content: flex-end; min-height: 1.9rem; margin-top: 0.45rem; }
.sound-btn {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    padding: 0.3rem 0.8rem;
    border-radius: 999px;
    border: 1px solid var(--border, #d9dce3);
    background: #fff;
    color: var(--text, #2b2b2b);
    font-size: 0.9rem;
    font-weight: 500;
    line-height: 1.2;
    cursor: pointer;
    box-shadow: 0 1px 2px rgba(0, 0, 0, 0.06);
    transition: background 0.15s ease-in-out, border-color 0.15s ease-in-out;
}
.sound-btn:hover,
.sound-btn:focus-visible { background: #f1f3f7; border-color: #b9bfcc; outline: none; }
.sound-btn[hidden],
.btn-pill[hidden] { display: none !important; }

/* "Full-resolution original" line under a video. */
.video-source-link {
    font-size: 0.85rem;
    color: var(--muted);
    margin-top: -0.2rem;
}
.video-source-link a { color: var(--accent); }

/* --------  Abstract + contributions (Overview)  -------- */

.subsection-title {
    font-weight: 600;
    font-size: 1.25rem;           /* sub-heading: Power Foam's .title.is-5 */
    line-height: 1.25;
    margin: 2rem 1rem 0.6rem;
}
.contrib-list {
    line-height: 1.4;
    color: #3a3f47;
    padding: 0 1rem 0 2.6rem;
    margin-bottom: 0;
}
.contrib-list li { margin-bottom: 0.45rem; }

/* --------  Method section (video + two paper figures)  -------- */

.method-figure { margin: 2.2rem auto 0; }
.method-figure img {
    display: block;
    max-width: 100%;
    height: auto;
    margin: 0 auto;
}
.method-figure figcaption {
    font-size: 0.95rem;           /* captions: Power Foam's .method-caption */
    color: var(--muted);
    line-height: 1.5;
    margin: 0.8rem 1rem 0;
}
.method-figure figcaption b { color: var(--brand); }
/* the method video's caption carries an inline font-size in index.html: same caption size */
#method-video + p { font-size: 0.95rem !important; line-height: 1.5; }

/* --------  Phones: compact hero so the buttons and the launch video
 *            make it into the first screen. Desktop is unaffected.  -------- */

@media (max-width: 576px) {
    .jumbotron { padding: 1.25rem 0.25rem 1rem; }
    .jumbotron h2 {
        font-size: 1.4rem;        /* Power Foam's phone subtitle */
        line-height: 1.3;
        margin-bottom: 0;
    }
    .jumbotron h2 .title-name { font-size: 2rem; line-height: 1.2; }
    .jumbotron h2 br.br-wide { display: none; }
    .jumbotron .subtitle {
        font-size: 0.95rem;
        line-height: 1.45;
        margin: 0.5rem 0 0;
    }
    .jumbotron .author-list {
        margin: 0.65rem 0 0;
        line-height: 1.5;
        font-size: 1.05rem;
    }
    .jumbotron .affiliations {
        display: inline-block;
        font-size: 0.9rem;
        line-height: 1.45;
        margin-top: 0.2rem;
    }
    .jumbotron .author-list .footnote { font-size: 0.9rem; margin-top: 0; }
    .jumbotron .venue { font-size: 0.95rem; margin: 0.5rem 0 0.6rem; }
    .jumbotron .btn-group-row { gap: 0.4rem; margin: 0.4rem 0 0; }
    .jumbotron .btn-pill { padding: 0.42rem 0.85rem; font-size: 0.92rem; gap: 0.35rem; }
    .launch-section { padding-top: 0.9rem; }
    .sound-btn { font-size: 0.85rem; padding: 0.26rem 0.65rem; }
    .lead-text { text-align: left; }   /* justified text leaves wide gaps at 390 px */
}
.affiliations .aff { white-space: nowrap; }

/* hero links: the classic dark pills (arXiv · Paper · Code · Dataset) */
.hero-links {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 0.6rem 0.75rem;
    margin: 1.4rem 0 0.2rem;
}
.hero-btn {
    display: inline-flex;
    align-items: center;
    gap: 0.55rem;
    padding: 0.62rem 1.45rem;
    border-radius: 999px;
    background: #363636;
    color: #fff;
    font-size: 1.15rem;
    font-weight: 500;
    line-height: 1.2;
    text-decoration: none;
    transition: background 0.15s ease-in-out, transform 0.15s ease-in-out;
}
.hero-btn:hover, .hero-btn:focus-visible { background: #1f1f1f; color: #fff; text-decoration: none; transform: translateY(-1px); }
.hero-btn .hero-ico { display: inline-flex; width: 1.2em; justify-content: center; font-size: 1.05em; }
.hero-btn.pending { background: #a9adb5; cursor: default; pointer-events: none; }
@media (max-width: 576px) {
    .hero-links { gap: 0.45rem 0.5rem; margin-top: 1rem; }
    .hero-btn { padding: 0.5rem 1.05rem; font-size: 1rem; }
}

/* the method video is light on a light page: give it a visible edge so the title sits ON it */
#method-video {
    border-radius: 8px;
    box-shadow: 0 0 0 1px var(--border), 0 2px 10px rgba(20, 30, 50, 0.08);
}

/* body paragraphs are left-aligned; titles, hints and controls stay centred */
.lead-text, .res-setup, .res-footnote, .room-caption, figcaption { text-align: left; }

/* a note under an element: smaller, muted, with its label */
.room-note, .note {
    font-size: 0.92rem;
    color: var(--muted);
    border-left: 3px solid var(--border);
    padding-left: 0.85rem;
    margin-top: 0.9rem;
}
.note-label {
    display: inline-block;
    margin-right: 0.45rem;
    font-size: 0.72rem;
    font-weight: 600;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    color: #4a5260;
}

/* "Interactive" tag before a control line, and the hand mark on an interactive panel (Power Foam) */
.interactive-tag {
    display: inline-block;
    margin-right: 0.55rem;
    padding: 0.12rem 0.65rem;
    border-radius: 999px;
    background: #d9363e;
    color: #fff;
    font-size: 0.72rem;
    font-weight: 700;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    vertical-align: 0.12em;
}

/* section titles as cloth patchwork (images/titles/, tools/title/section_titles.py) */
.cloth-title { line-height: 1; }
.cloth-title img { display: block; height: 2.6rem; width: auto; margin: 0 auto; }
.sr-only { position: absolute !important; width: 1px; height: 1px; margin: -1px; padding: 0; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; border: 0; }
@media (max-width: 576px) { .cloth-title img { height: 2rem; } }