/*
 * World Observer Project Page Styles
 * Based on ReNoV template
 */

:root {
    /* Typography */
    --font-primary: 'Wanted Sans Variable', 'Wanted Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    --font-mono: monospace;

    /* Caption Font Size Configuration */
    --caption-font-size: 1rem;

    /* Colors - Brand */
    --color-primary: #44403c;
    --color-primary-light: #78716c;
    --color-primary-dark: #1c1917;

    /* Colors - Grayscale (warm stone greys) */
    --color-ink: #0c0a09;
    --color-bg: #ffffff;
    --color-bg-alt: #f7f7f5;
    --color-text-main: #292524;
    /* Slate 800 */
    --color-text-muted: #78716c;
    /* Slate 500 */
    --color-text-light: #a8a29e;
    /* Slate 400 */
    --color-border: #e7e5e4;
    /* Slate 200 */
    --color-border-light: #f5f5f4;
    /* Slate 100 */

    /* Layout */
    --container-width: 68rem;
    --header-height: 4rem;
    --sidebar-width: 160px;
}

/* Reset & Base */
* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    scroll-behavior: smooth;
    font-size: 14.5px;
    /* Global Scale */
}

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);
}

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

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

/* Typography Defaults */
h1,
h2,
h3,
h4 {
    color: #0f172a;
    /* Slate 900 */
    font-weight: 700;
    line-height: 1.2;
}


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

/* Layout Components */
.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);
    display: block;
    width: fit-content;
}

/* Navigation Sidebar */
.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: #e2e8f0;
    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: all 0.3s ease;
    top: var(--active-position, 0);
    height: 100px;
}

.sidebar-item {
    display: flex;
    align-items: center;
    gap: 1rem;
    transition: all 0.3s ease;
    position: relative;
}

.sidebar-dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background-color: #cbd5e1;
    /* Slate 300 */
    transition: all 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: all 0.3s ease;
}

.sidebar-item:hover .sidebar-dot,
.sidebar-item.active .sidebar-dot {
    background-color: #0b63f6;
    transform: scale(1.3);
}

.sidebar-item:hover .sidebar-label,
.sidebar-item.active .sidebar-label {
    color: #0b63f6;
    font-weight: 700;
}

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

    .sidebar {
        position: sticky;
        top: 0;
        left: 0;
        transform: none;
        width: 100%;
        height: auto;

        display: flex;
        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;

        -ms-overflow-style: none;
        scrollbar-width: none;
    }

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

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

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

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

.hero-title {
    font-size: 1.8rem;
    font-weight: 600;
    margin-bottom: 1.15rem;
    line-height: 1.25;
}

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

.hero-title .gradient-text {
    background: linear-gradient(to right, #0b63f6, #0b63f6);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

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

.hero-venue {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.15rem;
    font-size: 1.1rem;
    font-weight: 600;
    letter-spacing: 0.08em;
    color: #334155;
    margin-top: -1.5rem;
    margin-bottom: 1.25rem;
}

.hero-venue-sub {
    font-size: 0.9rem;
    font-weight: 500;
    letter-spacing: 0.04em;
    color: var(--color-text-muted);
}

.hero-venue-note {
    font-size: 0.78rem;
    font-weight: 400;
    font-style: italic;
    color: var(--color-text-light);
}

.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: #2450b5;
    font-weight: 500;
    white-space: nowrap;
}

.hero-authors a {
    color: #2450b5;
    text-decoration: none;
    transition: color 0.2s;
}

.hero-authors a:hover {
    color: #2563eb;
    text-decoration: underline;
}

.hero-affiliations {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 1rem;
    margin-bottom: 1.75rem;
    color: var(--color-text-muted);
    font-size: 1.15rem;
}

.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-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: #1e293b;
    /* Slate 800 */
    color: white;
    font-weight: 500;
    transition: background-color 0.3s;
}

.btn:hover {
    background-color: #334155;
    /* Slate 700 */
}

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

.btn.btn-outline {
    background-color: white;
    color: var(--color-text-main);
    border: 1px solid #cbd5e1;
    /* Slate 300 */
}

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

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

/* 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 0rem 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: white;
    font-size: 1.125rem;
    font-weight: 700;
    padding: 0.25rem 1rem;
    border-radius: 0.5rem;
    flex-shrink: 0;
}

.tldr-text {
    font-size: 1.25rem;
    color: var(--color-text-main);
    font-weight: 500;
    line-height: 1.625;
    margin-bottom: 0px !important;
    margin-top: 0px !important;
    text-align: center;
}

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

/* Demo Section */
.demo-block {
    margin-bottom: 4rem;
}

.demo-block:last-child {
    margin-bottom: 0;
}

.video-container {
    position: relative;
    width: 100%;
    border-radius: 0.5rem;
    overflow: hidden;
}

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

/* Video loading shimmer */
video.hero-video {
    min-height: 120px;
    background: linear-gradient(110deg, #e2e8f0 30%, #f1f5f9 50%, #e2e8f0 70%);
    background-size: 200% 100%;
    animation: shimmer 1.5s ease-in-out infinite;
}

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

video.lazy-video {
    min-height: 120px;
    background: linear-gradient(110deg, #e2e8f0 30%, #f1f5f9 50%, #e2e8f0 70%);
    background-size: 200% 100%;
    animation: shimmer 1.5s ease-in-out infinite;
}

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

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

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

.video-caption {
    display: block;
    text-align: center;
    font-size: 0.8rem;
    color: var(--color-text-light);
    margin-top: 0.05rem;
}

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

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

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

/* Two-Column Layout */
.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 (desktop: text left / image right, mobile: image on top) */
.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%;
    }
}

/* Abstract Section */
.abstract-text {
    font-size: 1.25rem;
    color: var(--color-text-main);
    text-align: left;
    line-height: 1.625;
}

/* Analysis subtitle (reused for demo subtitles) */
.analysis-subtitle {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 1rem;
}

/* Citation Section */
.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;
    text-align: left;
}

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

.citation-copy-btn {
    position: absolute;
    top: 0.5rem;
    right: 0.5rem;
    background-color: white;
    border: 1px solid #cbd5e1;
    color: var(--color-text-muted);
    padding: 0.25rem 0.5rem;
    border-radius: 0.25rem;
    font-size: 0.75rem;
    transition: opacity 0.2s;
    opacity: 0;
    cursor: pointer;
}

.citation-code {
    font-family: var(--font-mono);
    font-size: 1.0rem;
    line-height: 1.625;
}

/* Footer */
.footer {
    padding: 2rem 0;
    text-align: center;
    background-color: var(--color-bg);
    border-top: 1px solid var(--color-border);
}

.footer p {
    margin: 0;
    color: var(--color-text-muted);
}

/* Animations */
.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;
}

.tweet-gallery {
    display: flex;
    justify-content: flex-start;
    gap: 1rem;
    overflow-x: auto;
    padding: 1rem 0;
    scroll-snap-type: x mandatory;
    -webkit-overflow-scrolling: touch;
}

.tweet-gallery > blockquote,
.tweet-gallery > .twitter-tweet-rendered {
    flex: 0 0 350px;
    scroll-snap-align: start;
    min-width: 0;
    max-height: 385px;
    overflow-y: hidden;
    margin: 0 !important;
}

@media (max-width: 768px) {
    p {
        font-size: 1rem;
    }

    :root {
        --caption-font-size: 0.875rem;
    }

    .tweet-gallery > blockquote {
        flex: 0 0 300px;
    }
}

/* Hero reel (Atlas-style player) */
.reel-wrap {
    max-width: 88rem;
    margin: 0 auto 2rem auto;
}

.reel {
    position: relative;
    aspect-ratio: 16 / 9;
    width: 100%;
    max-width: 100%;
    border-radius: 1rem;
    overflow: hidden;
    background: #0c0d10;
}

.reel video {
    display: block;
    width: 100%;
    height: 100%;
    object-fit: cover;
    cursor: pointer;
    min-height: 0;
}

.reel-bar {
    position: absolute;
    left: 0;
    right: 0;
    bottom: 0;
    display: flex;
    align-items: center;
    gap: 0.65rem;
    padding: 2rem 1rem 0.75rem;
    background: linear-gradient(to top, rgba(0, 0, 0, 0.45), rgba(0, 0, 0, 0));
    color: #fff;
    opacity: 0;
    transition: opacity 0.2s;
}

.reel:hover .reel-bar,
.reel-bar:focus-within {
    opacity: 1;
}

@media (hover: none) {
    .reel-bar { opacity: 1; }
}

.reel-btn {
    flex: none;
    width: 1.5rem;
    height: 1.5rem;
    display: grid;
    place-items: center;
    border: 0;
    padding: 0;
    background: none;
    color: rgba(255, 255, 255, 0.85);
    cursor: pointer;
    border-radius: 999px;
}

.reel-btn:hover { color: #fff; }
.reel-btn svg { width: 1.125rem; height: 1.125rem; }

.reel-btn:focus-visible,
.reel-seek:focus-visible {
    outline: 2px solid #fff;
    outline-offset: 2px;
}

.reel-seek {
    flex: 1;
    min-width: 0;
    padding: 0.4rem 0;
    cursor: pointer;
    border-radius: 4px;
}

.reel-track {
    position: relative;
    height: 2px;
    border-radius: 999px;
    background: rgba(255, 255, 255, 0.25);
    overflow: hidden;
}

.reel-fill {
    position: absolute;
    top: 0;
    bottom: 0;
    left: 0;
    width: 0;
    background: #fff;
}

.reel-time {
    flex: none;
    font-size: 0.75rem;
    font-variant-numeric: tabular-nums;
    color: rgba(255, 255, 255, 0.85);
}

@media (prefers-reduced-motion: reduce) {
    .reel-bar { transition: none; }
}

/* Training-data example rows: actor | observer(s), equal heights */
.pair-list {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
    margin: 1.25rem 0 0.25rem;
}

.pair-row {
    display: flex;
    gap: 0.5rem;
}

.pair-row > .clip,
.pair-row > .clip-col {
    flex: var(--ar) 1 0;
    min-width: 0;
}

.clip-col {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.clip {
    position: relative;
    border-radius: 0.5rem;
    overflow: hidden;
    background: #0c0d10;
}

.clip video {
    display: block;
    width: 100%;
    aspect-ratio: var(--ar);
    max-width: 100%;
    object-fit: cover;
    min-height: 0;
}

.clip-label {
    position: absolute;
    left: 0.5rem;
    top: 0.5rem;
    padding: 0.1rem 0.45rem;
    border-radius: 0.3rem;
    background: rgba(0, 0, 0, 0.55);
    color: #fff;
    font-size: 0.75rem;
    font-weight: 600;
    letter-spacing: 0.02em;
}

@media (max-width: 640px) {
    .pair-row { flex-direction: column; }
}

.pair-list { gap: 1.25rem; margin-top: 1.75rem; }

.pair-item {
    display: flex;
    flex-direction: column;
    gap: 0.4rem;
}

.pair-title {
    font-size: 0.95rem;
    font-weight: 700;
    color: var(--color-primary);
}

/* Model overview key points */
.model-points {
    display: flex;
    flex-direction: column;
    gap: 0.6rem;
    padding-left: 1.2rem;
    margin: 0;
}

.model-points li {
    font-size: 1.2rem;
    line-height: 1.6;
}

/* Comparison */
.cmp-tabs {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin: 1.25rem 0 1rem;
}

.cmp-tab {
    border: 1px solid var(--color-border);
    background: var(--color-bg);
    color: var(--color-text-muted);
    font: inherit;
    font-size: 0.9rem;
    font-weight: 600;
    padding: 0.4rem 0.9rem;
    border-radius: 999px;
    cursor: pointer;
}

.cmp-tab:hover { color: var(--color-primary); border-color: var(--color-primary); }
.cmp-tab.active { background: var(--color-primary); border-color: var(--color-primary); color: #fff; }
.cmp-tab:focus-visible { outline: 2px solid var(--color-primary); outline-offset: 2px; }

.cmp-panel { display: none; }
.cmp-panel.active { display: block; }

.cmp-caption {
    font-size: 0.95rem;
    color: var(--color-text-muted);
    margin-bottom: 0.75rem;
}

.cmp-top {
    display: grid;
    gap: 0.5rem;
    margin-bottom: 0.5rem;
}

.cmp-top.cols-2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.cmp-top.cols-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }

.cmp-grid {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 0.5rem;
}

.clip.contain video { object-fit: contain; }

.clip.is-ours { box-shadow: 0 0 0 2px var(--color-primary); }
.clip.is-ours .clip-label { background: var(--color-primary); }

@media (max-width: 768px) {
    .cmp-top.cols-3 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
    .cmp-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

/* Ablation */
.abl-grid {
    display: grid;
    gap: 1rem;
    margin-top: 1rem;
}

.abl-grid.cols-4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }
.abl-grid.cols-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.abl-grid.cols-2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }

.prompt-box {
    display: flex;
    align-items: baseline;
    gap: 0.75rem;
    margin: 0 0 1.25rem;
    padding: 0.75rem 1rem;
    border: 1px solid var(--color-border);
    border-radius: 8px;
    background-color: var(--color-bg-alt);
}
.prompt-label {
    flex: none;
    font-size: 0.75rem;
    font-weight: 600;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    color: var(--color-text-muted);
}
.prompt-text { margin: 0; font-style: italic; color: var(--color-text-main); }
.prompt-text strong { font-weight: 700; color: var(--color-ink); }
@media (max-width: 640px) {
    .prompt-box { flex-direction: column; gap: 0.25rem; }
}

.abl-card {
    margin: 0;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    min-width: 0;
}

.abl-head {
    display: flex;
    align-items: center;
    gap: 0.45rem;
    font-size: 0.95rem;
}

.abl-tag {
    font-size: 0.7rem;
    font-weight: 700;
    letter-spacing: 0.04em;
    text-transform: uppercase;
    padding: 0.1rem 0.45rem;
    border-radius: 0.3rem;
    background: var(--color-border-light);
    color: var(--color-text-muted);
}

.abl-tag.ours { background: var(--color-primary); color: #fff; }
.abl-card.is-ours .abl-head b { color: var(--color-primary); }

.abl-streams {
    display: flex;
    flex-direction: column;
    gap: 0.4rem;
}

.abl-card figcaption {
    font-size: 0.85rem;
    line-height: 1.5;
    color: var(--color-text-muted);
}

.clip-empty {
    aspect-ratio: var(--ar);
    border-radius: 0.5rem;
    border: 1px dashed var(--color-border);
    display: grid;
    place-items: center;
    font-size: 0.8rem;
    color: var(--color-text-light);
}

@media (max-width: 1024px) {
    .abl-grid.cols-4 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (max-width: 640px) {
    .abl-grid.cols-4,
    .abl-grid.cols-3,
    .abl-grid.cols-2 { grid-template-columns: minmax(0, 1fr); }
}

/* Compact data examples: three columns, actor above its observer(s) */
.pair-list.compact {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 1rem;
    margin-top: 1.25rem;
    align-items: start;
}

.pair-list.compact .pair-row {
    flex-direction: column;
    gap: 0.35rem;
}

.pair-list.compact .pair-row > .clip {
    flex: none;
}

.pair-list.compact .clip-label {
    font-size: 0.65rem;
    left: 0.35rem;
    top: 0.35rem;
}

.clip-pair {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 0.35rem;
}

@media (max-width: 768px) {
    .pair-list.compact { grid-template-columns: minmax(0, 1fr); }
}

/* Multi-Observer: observers stacked at full column width */
.pair-list.compact .clip-pair {
    grid-template-columns: minmax(0, 1fr);
}

.cmp-tabs { align-items: center; }

.cmp-dots {
    display: flex;
    gap: 0.4rem;
    margin-left: auto;
}

.cmp-dot {
    width: 0.55rem;
    height: 0.55rem;
    padding: 0;
    border: 0;
    border-radius: 999px;
    background: var(--color-border);
    cursor: pointer;
}

.cmp-dot.active { background: var(--color-primary); }
.cmp-dot:focus-visible { outline: 2px solid var(--color-primary); outline-offset: 2px; }

.cmp-caption { font-style: italic; }

.cmp-dot.synth + .cmp-dot.synth,
.cmp-dot:not(.synth) + .cmp-dot:not(.synth) { margin-left: 0; }
.cmp-dot:not(.synth) + .cmp-dot.synth { margin-left: 0.5rem; }


/* =========================================================
   World Observer theme: indigo accent on warm stone greys
   (overrides the inherited SWM styles above)
   ========================================================= */
h1, h2, h3, h4 { color: var(--color-ink); }

.section-title {
    color: var(--color-ink);
    font-weight: 600;
    letter-spacing: -0.025em;
    border-bottom: 0;
    padding-bottom: 0;
    margin-bottom: 1.25rem;
}

.subsection-title { color: var(--color-ink); letter-spacing: -0.015em; }

.hero-title { color: var(--color-ink); letter-spacing: -0.03em; }
.hero-title .gradient-text { background: none; -webkit-text-fill-color: var(--color-primary); color: var(--color-primary); }

.hero-authors span,
.hero-authors a { color: var(--color-text-main); }
.hero-authors a { text-decoration: underline; text-decoration-color: var(--color-border); text-underline-offset: 3px; }
.hero-authors a:hover { color: var(--color-primary); text-decoration-color: currentColor; }

.hero-venue { color: var(--color-text-muted); }

.btn { background-color: var(--color-ink); }
.btn:hover { background-color: #292524; }
.btn.btn-outline { border-color: var(--color-border); background-color: var(--color-bg); }

.tldr-box {
    border: 1px solid var(--color-border);
    background-color: var(--color-bg-alt);
    border-radius: 1rem;
}

.tldr-label { background-color: var(--color-ink); font-size: 0.95rem; letter-spacing: 0.04em; }

/* Sidebar: quiet table of contents, short rule marks the current section */
.sidebar { gap: 0.7rem; left: 2.25rem; }
.sidebar::before,
.sidebar::after { display: none; }
.sidebar-item { gap: 0.7rem; }
.sidebar-dot {
    width: 12px;
    height: 1px;
    border: 0;
    border-radius: 0;
    background-color: var(--color-text-light);
    transform: none;
}
.sidebar-label { font-size: 0.8rem; font-weight: 500; color: var(--color-text-light); letter-spacing: 0.01em; }
.sidebar-item:hover .sidebar-dot { background-color: var(--color-text-muted); transform: none; width: 18px; }
.sidebar-item:hover .sidebar-label { color: var(--color-text-muted); font-weight: 500; }
.sidebar-item.active .sidebar-dot { background-color: var(--color-ink); transform: none; width: 24px; }
.sidebar-item.active .sidebar-label { color: var(--color-ink); font-weight: 600; }
.sidebar-item:focus-visible { outline: 2px solid var(--color-primary); outline-offset: 4px; border-radius: 2px; }

@media (max-width: 1280px) {
    .sidebar { gap: 0.25rem; background-color: rgba(255, 255, 255, 0.92); }
    .sidebar-label { font-size: 0.85rem; }
}

/* Comparison tabs and dots in ink; accent stays reserved for "Ours" */
.cmp-tab:hover { color: var(--color-ink); border-color: var(--color-text-light); }
.cmp-tab.active { background: var(--color-ink); border-color: var(--color-ink); color: #fff; }
.cmp-dot.active { background: var(--color-ink); }

.pair-title { color: var(--color-ink); }


/* Monochrome title: graphite fading into stone */
.hero-title .gradient-text {
    background: linear-gradient(100deg, var(--color-ink) 0%, #57534e 55%, #a8a29e 100%);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    color: transparent;
}

.tldr-highlight { color: var(--color-ink); }

.hero-authors { font-size: 1.1rem; column-gap: 1.25rem; }

/* Observer eye above the title: a camera-lens iris with a recording light */
.hero-eye {
    display: flex;
    justify-content: center;
    margin-bottom: 0.9rem;
}

.hero-eye svg { width: 5.25rem; height: auto; overflow: visible; }
.eye-shape { fill: var(--color-bg); }
.eye-iris { fill: var(--color-ink); }
.eye-lens-ring { fill: none; stroke: var(--color-text-muted); stroke-width: 0.8; }
.eye-blades { fill: var(--color-text-muted); }
.eye-pupil { fill: var(--color-ink); }
.eye-glint { fill: #ffffff; opacity: 0.9; }
.eye-outline { fill: none; stroke: var(--color-ink); stroke-width: 2.6; stroke-linejoin: round; }
.eye-rec { fill: #b91c1c; animation: eye-rec 1.4s steps(1) infinite; }

.eye-lid {
    transform-box: fill-box;
    transform-origin: center;
    animation: eye-blink 4.2s ease-in-out infinite;
}

.eye-blades {
    transform-box: fill-box;
    transform-origin: center;
    animation: eye-aperture 7s ease-in-out infinite;
}

@keyframes eye-blink {
    0%, 90%, 100% { transform: scaleY(1); }
    94% { transform: scaleY(0.08); }
    97% { transform: scaleY(1); }
}

@keyframes eye-aperture {
    0%, 100% { transform: rotate(0deg) scale(1); }
    50% { transform: rotate(28deg) scale(0.82); }
}

@keyframes eye-rec {
    0%, 60% { opacity: 1; }
    61%, 100% { opacity: 0.15; }
}

@media (prefers-reduced-motion: reduce) {
    .eye-lid, .eye-blades, .eye-rec { animation: none; }
}

.author-break { flex-basis: 100%; height: 0; }