/*
 * Project page styles
 * Layout modelled on the Seoul World Model page (fixed scroll-spy sidebar,
 * centred hero, 68rem reading column), with its own palette and type.
 */

:root {
    /* Typography */
    --font-primary: 'Pretendard Variable', Pretendard, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    --font-mono: 'JetBrains Mono', ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;

    /* Brand: ink-blue primary, coral for the second wearer */
    --color-primary: #1f4fd8;
    --color-primary-light: #4a72e6;
    --color-primary-dark: #163ba3;
    --color-ego-a: #1f4fd8;
    --color-ego-b: #e4572e;

    /* Neutrals, blue-biased */
    --color-bg: #ffffff;
    --color-bg-alt: #f4f6fb;
    --color-text-main: #1c2333;
    --color-text-muted: #5f6b80;
    --color-text-light: #98a2b6;
    --color-border: #e1e6ef;
    --color-border-light: #eef1f6;

    /* Layout */
    --container-width: 68rem;
    --sidebar-width: 160px;
}

*,
*::before,
*::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    scroll-behavior: smooth;
    font-size: 14.5px;
}

body {
    font-family: var(--font-primary);
    background-color: var(--color-bg);
    color: var(--color-text-main);
    line-height: 1.6;
    padding-left: var(--sidebar-width);
    -webkit-font-smoothing: antialiased;
}

img,
video {
    max-width: 100%;
    height: auto;
    display: block;
}

a {
    text-decoration: none;
    color: inherit;
}

h1, h2, h3, h4 {
    color: #0f172a;
    font-weight: 700;
    line-height: 1.2;
    text-wrap: balance;
}

p {
    margin-top: 0.8rem;
    margin-bottom: 1.5rem;
    font-size: 1.2rem;
    color: var(--color-text-main);
    line-height: 1.625;
}

strong {
    font-weight: 700;
}

/* Layout */
.container {
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 1rem;
}

.section {
    width: 100%;
    padding: 3rem 0;
    border-top: 1px solid var(--color-border);
}

.section.alt-bg {
    background-color: var(--color-bg-alt);
}

.section-title {
    font-size: 1.75rem;
    font-weight: 600;
    letter-spacing: -0.01em;
    color: var(--color-primary-dark);
    margin-bottom: 2rem;
    padding-bottom: 0.75rem;
    border-bottom: 2px solid var(--color-border);
    width: fit-content;
}

.subsection-title {
    font-size: 1.35rem;
    font-weight: 600;
    margin-top: 3rem;
    margin-bottom: 1rem;
    color: var(--color-text-main);
}

/* Sidebar navigation */
.sidebar {
    position: fixed;
    top: 50%;
    left: 2rem;
    transform: translateY(-50%);
    z-index: 100;
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.sidebar::before {
    content: '';
    position: absolute;
    top: 0;
    bottom: 0;
    left: 6px;
    width: 3px;
    background: var(--color-border);
    z-index: 0;
}

.sidebar::after {
    content: '';
    position: absolute;
    left: 6px;
    width: 3px;
    background: linear-gradient(to bottom, transparent, var(--color-primary), var(--color-primary), transparent);
    z-index: 1;
    transition: top 0.3s ease;
    top: var(--active-position, 0);
    height: 100px;
}

.sidebar-item {
    display: flex;
    align-items: center;
    gap: 1rem;
    position: relative;
}

.sidebar-dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background-color: #c9d2e0;
    transition: transform 0.3s ease, background-color 0.3s ease;
    border: 2px solid var(--color-bg);
    box-sizing: content-box;
    position: relative;
    z-index: 2;
}

.sidebar-label {
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--color-text-muted);
    transition: color 0.3s ease;
}

.sidebar-item:hover .sidebar-dot,
.sidebar-item.active .sidebar-dot {
    background-color: var(--color-primary);
    transform: scale(1.3);
}

.sidebar-item:hover .sidebar-label,
.sidebar-item.active .sidebar-label {
    color: var(--color-primary);
    font-weight: 700;
}

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

@media (max-width: 1280px) {
    body {
        padding-left: 0;
    }

    .sidebar {
        position: sticky;
        top: 0;
        left: 0;
        transform: none;
        width: 100%;
        flex-direction: row;
        justify-content: center;
        align-items: center;
        gap: 1.5rem;
        padding: 1rem;
        background-color: rgba(255, 255, 255, 0.95);
        backdrop-filter: blur(10px);
        -webkit-backdrop-filter: blur(10px);
        border-bottom: 1px solid var(--color-border);
        box-shadow: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
        overflow-x: auto;
        white-space: nowrap;
        -webkit-overflow-scrolling: touch;
        z-index: 1000;
        scrollbar-width: none;
    }

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

    .sidebar::before,
    .sidebar::after,
    .sidebar-dot {
        display: none;
    }

    .sidebar-item {
        gap: 0;
        padding: 0.5rem;
    }

    .sidebar-label {
        font-size: 0.95rem;
    }
}

@media (max-width: 640px) {
    .sidebar {
        justify-content: flex-start;
        padding: 1rem 1.5rem;
        gap: 1rem;
    }
}

/* Hero */
.hero-section {
    padding-top: 4rem;
    text-align: center;
    margin-bottom: 3rem;
}

.hero-container {
    max-width: 64rem;
    margin: 0 auto 3rem auto;
    padding: 0 1rem;
}

.hero-title {
    font-size: 1.8rem;
    font-weight: 700;
    margin-bottom: 1.15rem;
    line-height: 1.25;
    letter-spacing: -0.02em;
}

.hero-title .hero-subtitle {
    font-weight: 400;
    font-size: 0.8em;
    line-height: 1.3;
    display: inline-block;
    margin-top: 0.2em;
    letter-spacing: -0.01em;
}

.hero-title .brand-text {
    color: var(--color-primary);
}

.hero-title .brand-text .ego-a { color: var(--color-ego-a); }
.hero-title .brand-text .ego-b { color: var(--color-ego-b); }

@media (min-width: 768px) {
    .hero-title {
        font-size: 2.9rem;
    }
}

.hero-authors {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    column-gap: 1rem;
    row-gap: 0.2rem;
    font-size: 0.95rem;
    margin-bottom: 1.5rem;
    max-width: 56rem;
    margin-left: auto;
    margin-right: auto;
}

.hero-authors span {
    color: var(--color-primary-dark);
    font-weight: 500;
    white-space: nowrap;
}

.hero-authors a {
    color: var(--color-primary-dark);
    transition: color 0.2s;
}

.hero-authors a:hover {
    color: var(--color-primary);
    text-decoration: underline;
}

.hero-affiliations {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 1rem;
    margin-bottom: 1rem;
    color: var(--color-text-muted);
    font-size: 1rem;
}

.hero-notes {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 1.5rem;
    margin-bottom: 2rem;
    color: var(--color-text-light);
    font-size: 0.875rem;
    font-style: italic;
}

.hero-venue {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.15rem;
    font-size: 1.1rem;
    font-weight: 600;
    letter-spacing: 0.06em;
    color: #334155;
    margin-top: -1.5rem;
    margin-bottom: 1.25rem;
}

.hero-venue-sub {
    font-size: 0.85rem;
    font-weight: 500;
    letter-spacing: 0.04em;
    text-transform: none;
    color: var(--color-text-muted);
}

.hero-buttons {
    display: flex;
    justify-content: center;
    gap: 1rem;
    flex-wrap: wrap;
    margin-bottom: 3rem;
}

.btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 1.25rem;
    border-radius: 9999px;
    background-color: #1c2333;
    color: #fff;
    font-weight: 500;
    transition: background-color 0.3s;
}

.btn:hover {
    background-color: #334155;
}

.btn.btn-outline {
    background-color: #fff;
    color: var(--color-text-main);
    border: 1px solid #c9d2e0;
}

.btn.btn-outline:hover {
    background-color: var(--color-bg-alt);
}

.btn.disabled {
    opacity: 0.5;
    pointer-events: none;
}

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

/* Teaser & TL;DR */
.teaser-container {
    width: 100%;
    max-width: 1800px;
    margin: 0 auto;
    padding: 0 1rem;
}

.tldr-box {
    width: 100%;
    max-width: 72rem;
    margin: 0 auto;
    background-color: var(--color-bg-alt);
    border: 2px solid var(--color-primary);
    border-radius: 12px;
    padding: 2rem;
}

.tldr-content {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

@media (min-width: 768px) {
    .tldr-content {
        flex-direction: row;
        align-items: center;
    }
}

.tldr-label {
    background-color: var(--color-primary);
    color: #fff;
    font-size: 1.125rem;
    font-weight: 700;
    padding: 0.25rem 1rem;
    border-radius: 0.5rem;
    flex-shrink: 0;
}

.tldr-text {
    font-size: 1.25rem;
    font-weight: 500;
    line-height: 1.625;
    margin: 0 !important;
    text-align: center;
}

.tldr-highlight {
    color: var(--color-primary);
    font-weight: 800;
}

/* Video & figure blocks */
.video-container {
    position: relative;
    width: 100%;
    border-radius: 0.5rem;
    overflow: hidden;
}

.video-container video {
    width: 100%;
    display: block;
    border-radius: 0.5rem;
}

video.hero-video,
video.lazy-video {
    min-height: 120px;
    background: linear-gradient(110deg, #e1e6ef 30%, #eef1f6 50%, #e1e6ef 70%);
    background-size: 200% 100%;
    animation: shimmer 1.5s ease-in-out infinite;
}

video.hero-video.loaded,
video.lazy-video.loaded {
    background: none;
    animation: none;
}

@keyframes shimmer {
    0% { background-position: 200% 0; }
    100% { background-position: -200% 0; }
}

.video-caption {
    display: block;
    text-align: center;
    font-size: 0.8rem;
    color: var(--color-text-light);
    margin-top: 0.3rem;
}

.figure-caption {
    display: block;
    text-align: center;
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--color-text-main);
    margin-top: 0.5rem;
}

.speed-label {
    position: absolute;
    bottom: 12px;
    right: 12px;
    font-size: 0.8rem;
    color: #fff;
    background: rgba(0, 0, 0, 0.5);
    padding: 2px 8px;
    border-radius: 4px;
}

.figure-container {
    width: 100%;
    margin-bottom: 1.5rem;
    border-radius: 0.5rem;
    overflow: hidden;
}

.figure-container img {
    width: 100%;
    border-radius: 0.5rem;
}

/* Placeholder for figures not yet exported */
.figure-placeholder {
    display: grid;
    place-items: center;
    min-height: 220px;
    border: 2px dashed #c9d2e0;
    border-radius: 0.5rem;
    color: var(--color-text-light);
    font-size: 0.95rem;
    text-align: center;
    padding: 2rem;
    background:
        repeating-linear-gradient(45deg, transparent 0 14px, rgba(31, 79, 216, 0.04) 14px 28px);
}

/* Grids */
.video-grid {
    display: grid;
    gap: 0.75rem;
    margin-bottom: 0.5rem;
}

.video-grid.cols-2 { grid-template-columns: repeat(2, 1fr); }
.video-grid.cols-3 { grid-template-columns: repeat(3, 1fr); }
.video-grid.cols-4 { grid-template-columns: repeat(4, 1fr); }

.video-grid .cell {
    position: relative;
    min-width: 0;
}

.video-grid .cell video {
    width: 100%;
    border-radius: 0.5rem;
}

.cell-label {
    display: block;
    text-align: center;
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--color-text-muted);
    margin-top: 0.35rem;
}

.cell-label.ego-a { color: var(--color-ego-a); }
.cell-label.ego-b { color: var(--color-ego-b); }
.cell-label.ours  { color: var(--color-primary); }

.corner-tag {
    position: absolute;
    top: 8px;
    left: 8px;
    font-size: 0.75rem;
    font-weight: 600;
    color: #fff;
    background: rgba(0, 0, 0, 0.55);
    padding: 2px 8px;
    border-radius: 4px;
    pointer-events: none;
}

@media (max-width: 768px) {
    .video-grid.cols-3,
    .video-grid.cols-4 {
        grid-template-columns: repeat(2, 1fr);
    }
}

.two-col {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
    margin-bottom: 1rem;
}

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

.text-figure-row {
    display: flex;
    gap: 2rem;
    align-items: center;
}

.text-figure-text { flex: 1; }
.text-figure-img  { flex: 0 0 45%; }

@media (max-width: 768px) {
    .text-figure-row {
        flex-direction: column-reverse;
    }
    .text-figure-img {
        flex: none;
        width: 100%;
    }
}

/* Small inline legend chips */
.legend {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem 1.25rem;
    margin: -0.5rem 0 1.25rem;
    font-size: 0.9rem;
    color: var(--color-text-muted);
}

.legend span::before {
    content: '';
    display: inline-block;
    width: 10px;
    height: 10px;
    border-radius: 50%;
    margin-right: 0.4rem;
    vertical-align: middle;
    background: currentColor;
}

.legend .ego-a { color: var(--color-ego-a); }
.legend .ego-b { color: var(--color-ego-b); }

/* Abstract */
.abstract-text p {
    font-size: 1.25rem;
    line-height: 1.625;
}

/* Citation */
.citation-section {
    padding: 8rem 0;
    border-top: 1px solid var(--color-border);
    margin-top: 2rem;
}

.citation-block {
    background-color: var(--color-bg-alt);
    color: var(--color-text-muted);
    padding: 1rem;
    border-radius: 0.25rem;
    border: 1px solid var(--color-border);
    overflow-x: auto;
    position: relative;
}

.citation-block:hover .citation-copy-btn,
.citation-copy-btn:focus-visible {
    opacity: 1;
}

.citation-copy-btn {
    position: absolute;
    top: 0.5rem;
    right: 0.5rem;
    background-color: #fff;
    border: 1px solid #c9d2e0;
    color: var(--color-text-muted);
    padding: 0.25rem 0.5rem;
    border-radius: 0.25rem;
    font-size: 0.75rem;
    font-family: inherit;
    transition: opacity 0.2s;
    opacity: 0;
    cursor: pointer;
}

.citation-code {
    font-family: var(--font-mono);
    font-size: 0.95rem;
    line-height: 1.625;
}

/* Footer-ish */
.note-text {
    font-size: 0.95rem;
    color: var(--color-text-muted);
    line-height: 1.6;
    margin: 0;
}

.ack-title {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--color-text-muted);
    margin-bottom: 0.75rem;
}

/* Fade-in */
.fade-in-section {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.6s ease-out, transform 0.6s ease-out;
}

.fade-in-section.is-visible {
    opacity: 1;
    transform: none;
}

@media (prefers-reduced-motion: reduce) {
    html { scroll-behavior: auto; }
    .fade-in-section {
        opacity: 1;
        transform: none;
        transition: none;
    }
    video.hero-video,
    video.lazy-video {
        animation: none;
    }
}

@media (max-width: 768px) {
    p,
    .abstract-text p {
        font-size: 1rem;
    }
    .tldr-text {
        font-size: 1.05rem;
    }
}

/* ---- ME-World additions ---- */

/* generated pair (2:1) beside a third-person reference (1:1) */
.pair-row {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 0.5rem;
    align-items: start;
    min-width: 0;
}

/* three ego views (3:1) beside a third-person reference (1:1) */
.triple-row {
    display: grid;
    grid-template-columns: 3fr 1fr;
    gap: 0.5rem;
    align-items: start;
    min-width: 0;
}

.pair-row .cell,
.triple-row .cell {
    position: relative;
    min-width: 0;
}

.pair-row video,
.triple-row video {
    width: 100%;
    border-radius: 0.5rem;
}

.examples {
    display: grid;
    gap: 1.25rem;
    margin-bottom: 0.5rem;
}

.examples.cols-2 {
    grid-template-columns: 1fr 1fr;
}

@media (max-width: 900px) {
    .examples.cols-2 {
        grid-template-columns: 1fr;
    }
}

.view-tags {
    position: absolute;
    inset: 0;
    display: grid;
    pointer-events: none;
}

.view-tags.two   { grid-template-columns: 1fr 1fr; }
.view-tags.three { grid-template-columns: 1fr 1fr 1fr; }

.view-tags span {
    align-self: start;
    justify-self: start;
    margin: 8px;
    font-size: 0.75rem;
    font-weight: 600;
    color: #fff;
    background: rgba(0, 0, 0, 0.55);
    padding: 2px 8px;
    border-radius: 4px;
}

.view-tags span.a { background: rgba(31, 79, 216, 0.85); }
.view-tags span.b { background: rgba(228, 87, 46, 0.85); }
.view-tags span.c { background: rgba(21, 128, 61, 0.85); }

/* Example switcher for the comparison grid */
.tabs {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-bottom: 1rem;
}

.tab {
    font: inherit;
    font-size: 0.9rem;
    font-weight: 600;
    padding: 0.4rem 1rem;
    border-radius: 9999px;
    border: 1px solid #c9d2e0;
    background: #fff;
    color: var(--color-text-muted);
    cursor: pointer;
    transition: background-color 0.2s, color 0.2s, border-color 0.2s;
}

.tab:hover {
    background: var(--color-bg-alt);
}

.tab.active {
    background: var(--color-primary);
    border-color: var(--color-primary);
    color: #fff;
}

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

.cell-label .variant-idx {
    display: inline-block;
    min-width: 1.6em;
    margin-right: 0.35rem;
    padding: 0 0.35em;
    border-radius: 4px;
    background: var(--color-border);
    color: var(--color-text-main);
    font-family: var(--font-mono);
    font-size: 0.75rem;
    font-weight: 500;
    text-align: center;
}

.cell-label.ours .variant-idx {
    background: var(--color-primary);
    color: #fff;
}

.cell-label.gt {
    color: var(--color-text-main);
}

.frames-label {
    position: absolute;
    bottom: 12px;
    right: 12px;
    font-size: 0.8rem;
    color: #fff;
    background: rgba(0, 0, 0, 0.5);
    padding: 2px 8px;
    border-radius: 4px;
}

/* Metric list */
.metric-list {
    list-style: none;
    display: grid;
    gap: 0.75rem;
    margin: 0 0 1.5rem;
}

.metric-list li {
    display: grid;
    grid-template-columns: 6.5rem 1fr;
    gap: 1rem;
    align-items: baseline;
    font-size: 1.1rem;
    line-height: 1.55;
}

.metric-list .metric-name {
    font-family: var(--font-mono);
    font-size: 0.95rem;
    font-weight: 500;
    color: var(--color-primary-dark);
    white-space: nowrap;
}

@media (max-width: 640px) {
    .metric-list li {
        grid-template-columns: 1fr;
        gap: 0.2rem;
    }
}

.hero-title .hero-subtitle {
    max-width: 40ch;
}

/* Superscripts must not push their line down */
.hero-authors sup,
.hero-affiliations sup,
.hero-notes sup {
    font-size: 0.7em;
    line-height: 0;
    position: relative;
    vertical-align: baseline;
    top: -0.45em;
}

.hero-authors {
    align-items: baseline;
}

/* Corresponding authors on their own line */
.hero-authors {
    margin-bottom: 0.35rem;
}

.hero-authors-corr {
    margin-bottom: 1.5rem;
}

/* =====================================================================
   Restyle pass: same skeleton, different voice.
   - section titles: mono eyebrow + heavy title + short accent bar (no underline)
   - sidebar: hairline rail with ticks instead of dots
   - buttons: squared, outlined; primary filled with brand blue
   - TL;DR: left-accent callout
   - captions: small mono, left-aligned
   ===================================================================== */

:root {
    --color-bg-alt: #f5f7fb;
    --radius: 6px;
}

h1, h2, h3 {
    letter-spacing: -0.02em;
}

/* hero */
.hero-eyebrow {
    font-family: var(--font-mono);
    font-size: 0.8rem;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--color-text-muted);
    margin: 0 0 0.9rem;
}

.hero-title {
    font-weight: 800;
}

.hero-title .brand-text {
    display: inline-block;
    padding: 0 0.18em;
    margin-bottom: 0.18em;
    color: #fff;
    background: var(--color-primary);
    border-radius: var(--radius);
    letter-spacing: -0.03em;
}

.hero-title .hero-subtitle {
    font-weight: 500;
    font-size: 0.72em;
    color: var(--color-text-main);
}

.hero-venue {
    font-family: var(--font-mono);
    font-weight: 500;
    font-size: 0.85rem;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--color-text-muted);
}

.btn,
.btn.btn-outline {
    border-radius: var(--radius);
    padding: 0.55rem 1.1rem;
    font-weight: 600;
    font-size: 0.92rem;
    letter-spacing: 0.01em;
}

.btn {
    background: var(--color-primary);
    border: 1px solid var(--color-primary);
}

.btn:hover {
    background: var(--color-primary-dark);
}

.btn.btn-outline {
    background: #fff;
    border: 1px solid var(--color-border);
    color: var(--color-text-main);
}

.btn.btn-outline:hover {
    border-color: var(--color-primary);
    color: var(--color-primary);
    background: #fff;
}

/* section titles */
.section-title {
    position: relative;
    border-bottom: none;
    padding-bottom: 0;
    padding-top: 1.2rem;
    margin-bottom: 1.5rem;
    color: var(--color-text-main);
    font-size: 1.9rem;
    font-weight: 800;
}

.section-title::before {
    content: attr(data-eyebrow);
    position: absolute;
    top: 0;
    left: 0;
    font-family: var(--font-mono);
    font-size: 0.72rem;
    font-weight: 500;
    letter-spacing: 0.14em;
    text-transform: uppercase;
    color: var(--color-primary);
}

.section-title::after {
    content: '';
    display: block;
    width: 2.5rem;
    height: 3px;
    margin-top: 0.7rem;
    background: var(--color-primary);
    border-radius: 2px;
}

.section-title-sm {
    font-size: 1.4rem;
}

.subsection-title {
    font-size: 1.25rem;
    font-weight: 700;
    padding-left: 0.75rem;
    border-left: 3px solid var(--color-border);
}

/* sidebar: hairline rail + ticks */
.sidebar::before {
    left: 0;
    width: 1px;
    background: var(--color-border);
}

.sidebar::after {
    left: -1px;
    width: 3px;
    height: 1.4rem;
    background: var(--color-primary);
    border-radius: 2px;
}

.sidebar-tick {
    width: 10px;
    height: 1px;
    background: var(--color-border);
    flex: 0 0 auto;
    transition: width 0.25s ease, background-color 0.25s ease;
}

.sidebar-item {
    gap: 0.75rem;
}

.sidebar-item:hover .sidebar-tick,
.sidebar-item.active .sidebar-tick {
    width: 18px;
    background: var(--color-primary);
}

.sidebar-label {
    font-size: 0.82rem;
    font-weight: 500;
    letter-spacing: 0.01em;
}

.sidebar-item.active .sidebar-label {
    font-weight: 700;
}

@media (max-width: 1280px) {
    .sidebar-tick {
        display: none;
    }
}

/* TL;DR callout */
.tldr-box {
    border: none;
    border-left: 4px solid var(--color-primary);
    border-radius: 0 var(--radius) var(--radius) 0;
    background: var(--color-bg-alt);
    padding: 1.5rem 2rem;
}

.tldr-content {
    align-items: flex-start;
}

.tldr-label {
    background: none;
    color: var(--color-primary);
    font-family: var(--font-mono);
    font-size: 0.78rem;
    font-weight: 600;
    letter-spacing: 0.14em;
    padding: 0.35rem 0 0;
    border-radius: 0;
}

.tldr-text {
    text-align: left;
    font-weight: 450;
    font-size: 1.2rem;
}

.tldr-highlight {
    font-weight: 700;
    color: var(--color-primary-dark);
}

/* media */
.video-container,
.video-container video,
.figure-container,
.figure-container img,
.video-grid .cell video,
.pair-row video,
.triple-row video {
    border-radius: var(--radius);
}

.video-caption {
    text-align: left;
    font-family: var(--font-mono);
    font-size: 0.74rem;
    line-height: 1.5;
    color: var(--color-text-muted);
    margin-top: 0.55rem;
    padding-left: 0.6rem;
    border-left: 2px solid var(--color-border);
}

.cell-label {
    font-size: 0.8rem;
    font-weight: 600;
    text-align: left;
}

.corner-tag,
.view-tags span,
.frames-label,
.speed-label {
    font-family: var(--font-mono);
    font-size: 0.68rem;
    letter-spacing: 0.04em;
    border-radius: 3px;
}

.tab {
    border-radius: var(--radius);
    font-family: var(--font-mono);
    font-size: 0.8rem;
    letter-spacing: 0.02em;
}

/* citation */
.citation-block {
    border-radius: var(--radius);
    border-left: 4px solid var(--color-primary);
}

.citation-copy-btn {
    border-radius: 4px;
    opacity: 1;
    font-family: var(--font-mono);
}

/* sections: hairlines only, lighter alternation */
.section {
    padding: 3.5rem 0;
}

/* ---- Calibri everywhere ---- */
:root {
    --font-primary: Calibri, Carlito, 'Segoe UI', 'Helvetica Neue', Arial, sans-serif;
    --font-mono: Calibri, Carlito, 'Segoe UI', 'Helvetica Neue', Arial, sans-serif;
}

html {
    font-size: 15.5px;   /* Calibri runs small; compensate */
}

.citation-code {
    font-size: 1rem;
}

.section-title::before,
.hero-venue,
.tldr-label,
.video-caption,
.tab,
.corner-tag,
.view-tags span,
.frames-label,
.speed-label,
.cell-label .variant-idx,
.metric-list .metric-name {
    letter-spacing: 0.06em;
}

.video-caption {
    font-size: 0.85rem;
    letter-spacing: 0;
}

/* ---- sidebar: no rail, no ticks; the active section is a filled pill ---- */
.sidebar::before,
.sidebar::after,
.sidebar-tick {
    display: none;
}

.sidebar {
    gap: 0.35rem;
    left: 1.5rem;
}

.sidebar-item {
    gap: 0;
    padding: 0.3rem 0.75rem;
    border-radius: 999px;
    transition: background-color 0.2s ease;
}

.sidebar-item:hover {
    background: var(--color-bg-alt);
}

.sidebar-item.active {
    background: var(--color-primary);
}

.sidebar-item.active .sidebar-label,
.sidebar-item.active:hover .sidebar-label {
    color: #fff;
    font-weight: 700;
}

.sidebar-label {
    font-size: 0.88rem;
}

@media (max-width: 1280px) {
    .sidebar {
        gap: 0.35rem;
    }
    .sidebar-item {
        padding: 0.3rem 0.75rem;
    }
}

/* real-results grid: plain pair cells inside .examples */
.examples .cell {
    position: relative;
    min-width: 0;
}

.examples .cell video {
    width: 100%;
    border-radius: var(--radius);
}

/* embedded teaser keeps its controls visible on hover only */
video.hero-video[controls] {
    background: #0e1016;
}

/* every media cell is a positioning context, so Agent tags can never escape to the page corner */
.cell {
    position: relative;
}

/* no single-word last lines in the callout */
.tldr-text {
    text-wrap: pretty;
}