:root {
    --bg: #0b0f16;
    --bg-soft: #111827;
    --panel: #151c28;
    --panel-strong: #1c2634;
    --text: #f6f8fb;
    --muted: #aab4c3;
    --quiet: #7e8998;
    --line: #283447;
    --accent: #59c7df;
    --accent-strong: #2fa8c5;
    --accent-green: #7bd88f;
    --accent-warm: #f0b35b;
    --shadow: 0 24px 80px rgba(0, 0, 0, 0.34);
}

* {
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    margin: 0;
    font-family: "Inter", system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
    background: var(--bg);
    color: var(--text);
    line-height: 1.6;
}

a {
    color: inherit;
}

img {
    display: block;
    max-width: 100%;
}

.topbar {
    position: sticky;
    top: 0;
    z-index: 20;
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
    background: rgba(11, 15, 22, 0.86);
    backdrop-filter: blur(16px);
}

.topbar-inner {
    width: min(1180px, calc(100% - 40px));
    margin: 0 auto;
    min-height: 58px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 24px;
}

.brand {
    font-weight: 800;
    font-size: 0.98rem;
    color: var(--text);
    text-decoration: none;
    white-space: nowrap;
}

.nav {
    display: flex;
    align-items: center;
    gap: 18px;
    color: var(--muted);
    font-size: 0.92rem;
}

.nav a {
    text-decoration: none;
}

.nav a:hover {
    color: var(--text);
}

.hero {
    position: relative;
    min-height: auto;
    display: flex;
    align-items: flex-start;
    isolation: isolate;
    overflow: hidden;
    background:
        linear-gradient(90deg, #0b0f16 0%, #0b0f16 48%, rgba(13, 21, 31, 0.95) 100%),
        #0b0f16;
    border-bottom: 1px solid var(--line);
}

.hero::before {
    content: "";
    position: absolute;
    inset: 0;
    background-image:
        linear-gradient(rgba(255, 255, 255, 0.035) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255, 255, 255, 0.035) 1px, transparent 1px);
    background-size: 48px 48px;
    -webkit-mask-image: linear-gradient(90deg, transparent 0%, #000 58%, #000 100%);
    mask-image: linear-gradient(90deg, transparent 0%, #000 58%, #000 100%);
    opacity: 0.44;
}

.hero-inner {
    position: relative;
    z-index: 2;
    width: min(1180px, calc(100% - 40px));
    margin: 0 auto;
    padding: 54px 0 52px;
}

.eyebrow {
    margin: 0 0 16px;
    color: var(--accent-green);
    font-weight: 700;
    font-size: 0.92rem;
}

.title-lockup {
    max-width: 760px;
}

h1 {
    max-width: 760px;
    margin: 0;
    font-size: 3.28rem;
    line-height: 1.08;
    letter-spacing: 0;
}

.subtitle {
    max-width: 740px;
    margin: 20px 0 0;
    color: #d6dde8;
    font-size: 1.18rem;
}

.authors {
    max-width: 760px;
    margin: 26px 0 0;
    color: #eef3f9;
    font-size: 1.02rem;
}

.author-item {
    position: relative;
    display: inline-block;
    cursor: help;
    border-bottom: 1px dotted rgba(89, 199, 223, 0.42);
    outline: none;
}

.author-item:focus-visible {
    border-bottom-color: var(--accent);
}

.author-affiliations {
    position: absolute;
    left: 50%;
    bottom: calc(100% + 12px);
    z-index: 30;
    width: max-content;
    max-width: min(320px, 80vw);
    padding: 10px 12px;
    border: 1px solid rgba(89, 199, 223, 0.38);
    border-radius: 8px;
    background: rgba(15, 22, 32, 0.98);
    box-shadow: var(--shadow);
    color: #edf5fb;
    font-size: 0.82rem;
    line-height: 1.45;
    text-align: left;
    white-space: normal;
    opacity: 0;
    pointer-events: none;
    transform: translate(-50%, 6px);
    transition: opacity 140ms ease, transform 140ms ease;
}

.author-affiliations::after {
    content: "";
    position: absolute;
    left: 50%;
    top: 100%;
    width: 10px;
    height: 10px;
    border-right: 1px solid rgba(89, 199, 223, 0.38);
    border-bottom: 1px solid rgba(89, 199, 223, 0.38);
    background: rgba(15, 22, 32, 0.98);
    transform: translate(-50%, -5px) rotate(45deg);
}

.author-item:hover .author-affiliations,
.author-item:focus-visible .author-affiliations {
    opacity: 1;
    transform: translate(-50%, 0);
}

.authors sup,
.author-affiliations sup {
    color: var(--accent);
    font-size: 0.72em;
    font-weight: 700;
}

.links {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    margin-top: 30px;
}

.button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 44px;
    padding: 0 18px;
    border: 1px solid rgba(255, 255, 255, 0.16);
    border-radius: 8px;
    background: rgba(246, 248, 251, 0.08);
    color: var(--text);
    font-weight: 700;
    text-decoration: none;
    transition: border-color 160ms ease, background 160ms ease, transform 160ms ease;
}

.button.primary {
    border-color: rgba(89, 199, 223, 0.54);
    background: var(--accent-strong);
    color: #031016;
}

.button:hover {
    border-color: var(--accent);
    background: rgba(89, 199, 223, 0.16);
    transform: translateY(-1px);
}

.button.primary:hover {
    background: var(--accent);
}

.container {
    width: min(1180px, calc(100% - 40px));
    margin: 0 auto;
}

section {
    padding: 76px 0;
    border-bottom: 1px solid var(--line);
}

.section-head {
    max-width: 820px;
    margin-bottom: 30px;
}

.kicker {
    margin: 0 0 8px;
    color: var(--accent);
    font-size: 0.82rem;
    font-weight: 800;
    text-transform: uppercase;
}

h2 {
    margin: 0;
    font-size: 2rem;
    line-height: 1.18;
    letter-spacing: 0;
}

h3 {
    margin: 0;
    font-size: 1.08rem;
    line-height: 1.3;
}

.story-text {
    max-width: 980px;
    color: #dfe6ef;
    font-size: 1.08rem;
}

.story-text p {
    margin: 0;
}

.story-text p + p {
    margin-top: 18px;
}

.story-text strong {
    color: var(--text);
    font-weight: 800;
    background: linear-gradient(180deg, transparent 58%, rgba(89, 199, 223, 0.22) 58%);
}

.abstract-layout {
    display: grid;
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    align-items: start;
    gap: 40px;
}

.metrics {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 16px;
    margin-top: 34px;
}

.metric {
    min-height: 146px;
    padding: 22px;
    border: 1px solid var(--line);
    border-radius: 8px;
    background: var(--panel);
}

.metric-value {
    color: var(--accent-green);
    font-size: 2.35rem;
    line-height: 1;
    font-weight: 800;
}

.metric-label {
    margin-top: 12px;
    color: var(--text);
    font-weight: 700;
}

.metric-note {
    margin-top: 8px;
    color: var(--quiet);
    font-size: 0.92rem;
}

.abstract {
    max-width: 980px;
    color: #dfe6ef;
    font-size: 1.08rem;
}

.teaser-frame {
    width: min(760px, 100%);
    margin-top: 34px;
    box-shadow: var(--shadow);
}

.abstract-layout .teaser-frame {
    width: 100%;
    margin-top: 0;
}

.teaser-caption {
    width: min(760px, 100%);
    padding-inline: 0;
}

.abstract-layout .teaser-caption {
    width: 100%;
}

.principle {
    border: 1px solid var(--line);
    border-radius: 8px;
    background: var(--panel);
    overflow: hidden;
}

.video-shell {
    position: relative;
    overflow: hidden;
    background: #05080d;
}

.video-shell video {
    display: block;
    width: 100%;
    aspect-ratio: 16 / 9;
    object-fit: contain;
}

.video-index {
    position: absolute;
    top: 12px;
    left: 12px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 38px;
    height: 28px;
    padding: 0 8px;
    border: 1px solid rgba(89, 199, 223, 0.42);
    border-radius: 5px;
    background: rgba(7, 11, 17, 0.84);
    color: var(--accent);
    font-family: "Fira Code", ui-monospace, SFMono-Regular, Consolas, monospace;
    font-size: 0.75rem;
    font-weight: 700;
    pointer-events: none;
}

.video-index.static {
    position: static;
    grid-column: 1;
    grid-row: 1 / 3;
    margin: 0;
}

.task-gallery-heading > div {
    display: grid;
    grid-template-columns: auto minmax(0, 1fr);
    grid-template-rows: auto auto;
    align-items: center;
    column-gap: 12px;
    row-gap: 2px;
}

.task-gallery-heading .kicker {
    grid-column: 2;
    grid-row: 1;
    margin: 0;
}

.task-gallery-heading h3 {
    grid-column: 2;
    grid-row: 2;
}

.figure-caption {
    padding: 16px;
}

.figure-caption p {
    margin: 6px 0 0;
    color: var(--muted);
    font-size: 0.94rem;
}

.video-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 7px;
}

.video-meta span {
    padding: 3px 7px;
    border: 1px solid rgba(255, 255, 255, 0.12);
    border-radius: 4px;
    color: #bec9d7;
    font-size: 0.74rem;
    font-weight: 700;
    text-transform: uppercase;
}

.task-gallery {
    margin-top: 48px;
    padding: 22px;
    border: 1px solid var(--line);
    border-radius: 10px;
    background:
        radial-gradient(circle at 80% 0, rgba(89, 199, 223, 0.08), transparent 34%),
        var(--panel);
    box-shadow: var(--shadow);
}

.task-gallery-heading {
    display: grid;
    grid-template-columns: minmax(0, 1fr) minmax(280px, 0.68fr);
    align-items: end;
    gap: 30px;
    padding: 4px 2px 20px;
}

.task-gallery-heading h3 {
    font-size: 1.45rem;
}

.task-gallery-heading > p {
    margin: 0;
    color: var(--muted);
    font-size: 0.94rem;
}

.task-gallery-layout {
    display: grid;
    grid-template-columns: minmax(0, 1fr) 360px;
    align-items: start;
    gap: 18px;
}

.task-stage {
    min-width: 0;
}

.task-video-shell {
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: 7px 7px 0 0;
}

.task-active-copy {
    min-height: 132px;
    padding: 17px 18px 18px;
    border: 1px solid var(--line);
    border-top: 0;
    background: #101722;
}

.task-active-topline {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 18px;
}

.task-active-copy h3 {
    margin-top: 11px;
}

.task-active-copy p {
    margin: 6px 0 0;
    color: var(--muted);
    font-size: 0.94rem;
}

.task-count {
    flex: 0 0 auto;
    color: var(--quiet);
    font-family: "Fira Code", ui-monospace, SFMono-Regular, Consolas, monospace;
    font-size: 0.78rem;
}

.task-count strong {
    color: var(--accent);
    font-size: 1rem;
}

.gallery-controls {
    display: flex;
    justify-content: flex-end;
    gap: 8px;
    margin-top: 10px;
}

.gallery-arrow {
    min-height: 38px;
    padding: 0 13px;
    border: 1px solid var(--line);
    border-radius: 6px;
    background: #101722;
    color: var(--muted);
    font: inherit;
    font-size: 0.82rem;
    font-weight: 700;
    cursor: pointer;
    transition: border-color 150ms ease, color 150ms ease, background 150ms ease;
}

.gallery-arrow:hover {
    border-color: rgba(89, 199, 223, 0.55);
    background: rgba(89, 199, 223, 0.08);
    color: var(--text);
}

.task-rail {
    display: flex;
    max-height: 594px;
    padding-right: 7px;
    overflow-y: auto;
    flex-direction: column;
    gap: 8px;
    scrollbar-color: #3a4a60 #101722;
    scrollbar-width: thin;
}

.task-choice {
    display: grid;
    grid-template-columns: 104px minmax(0, 1fr) auto;
    align-items: center;
    gap: 11px;
    width: 100%;
    min-height: 76px;
    padding: 6px 9px 6px 6px;
    border: 1px solid var(--line);
    border-radius: 6px;
    background: #101722;
    color: var(--text);
    font: inherit;
    text-align: left;
    cursor: pointer;
    transition: border-color 150ms ease, background 150ms ease, transform 150ms ease;
}

.task-choice:hover {
    border-color: rgba(89, 199, 223, 0.42);
    background: #182231;
    transform: translateX(-2px);
}

.task-choice.is-active {
    border-color: rgba(89, 199, 223, 0.72);
    background: linear-gradient(90deg, rgba(47, 168, 197, 0.2), #172230 68%);
}

.task-choice img {
    width: 104px;
    height: 62px;
    border-radius: 3px;
    object-fit: cover;
}

.task-choice-copy {
    display: grid;
    min-width: 0;
    gap: 3px;
}

.task-choice-copy strong {
    overflow: hidden;
    font-size: 0.88rem;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.task-choice-copy span {
    overflow: hidden;
    color: var(--quiet);
    font-size: 0.74rem;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.task-number {
    color: #617085;
    font-family: "Fira Code", ui-monospace, SFMono-Regular, Consolas, monospace;
    font-size: 0.72rem;
}

.task-choice.is-active .task-number {
    color: var(--accent);
}

.gallery-arrow:focus-visible,
.task-choice:focus-visible {
    outline: 2px solid var(--accent);
    outline-offset: 2px;
}

.full-run-feature {
    display: grid;
    grid-template-columns: minmax(0, 1fr);
    gap: 28px;
    margin-top: 32px;
    padding: 28px;
    border: 1px solid var(--line);
    border-radius: 10px;
    background: linear-gradient(125deg, #121a26, #0d131d);
}

.feature-heading {
    display: flex;
    align-items: flex-start;
    gap: 12px;
}

.feature-heading .video-index {
    flex: 0 0 auto;
    margin-top: 1px;
}

.feature-heading .kicker {
    margin-bottom: 5px;
}

.full-run-copy h3 {
    font-size: 1.5rem;
}

.full-run-copy > p {
    margin: 12px 0 0;
    color: var(--muted);
    font-size: 0.96rem;
}

.full-run-video {
    border: 1px solid rgba(89, 199, 223, 0.2);
    border-radius: 7px;
}

.full-run-badge {
    position: absolute;
    top: 12px;
    right: 12px;
    padding: 5px 8px;
    border: 1px solid rgba(123, 216, 143, 0.38);
    border-radius: 5px;
    background: rgba(7, 11, 17, 0.84);
    color: var(--accent-green);
    font-size: 0.7rem;
    font-weight: 800;
    text-transform: uppercase;
    pointer-events: none;
}

.mixed-control-feature {
    margin-top: 52px;
    padding: 28px;
    border: 1px solid var(--line);
    border-radius: 10px;
    background:
        radial-gradient(circle at 100% 0, rgba(123, 216, 143, 0.08), transparent 38%),
        linear-gradient(125deg, #0d131d, #121a26);
}

.mixed-control-heading {
    display: flex;
    align-items: flex-end;
    justify-content: space-between;
    gap: 34px;
}

.mixed-control-heading .feature-heading {
    max-width: 790px;
}

.mixed-control-heading h3 {
    font-size: 1.5rem;
}

.mixed-control-heading .feature-heading p:last-child {
    margin: 10px 0 0;
    color: var(--muted);
    font-size: 0.96rem;
}

.mixed-control-videos {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 18px;
    margin-top: 24px;
}

.mixed-control-example {
    overflow: hidden;
    border: 1px solid var(--line);
    border-radius: 8px;
    background: #101722;
}

.mixed-control-video {
    border-bottom: 1px solid var(--line);
}

.mixed-control-caption {
    padding: 16px;
}

.mixed-control-caption h4 {
    margin: 10px 0 0;
    font-size: 1rem;
    line-height: 1.3;
}

.mixed-control-caption p {
    margin: 6px 0 0;
    color: var(--muted);
    font-size: 0.9rem;
}

.abstraction-sequence {
    flex: 0 0 auto;
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 8px;
    margin: 0 0 2px;
    color: var(--quiet);
    font-family: "Fira Code", ui-monospace, SFMono-Regular, Consolas, monospace;
    font-size: 0.76rem;
}

.abstraction-sequence span:nth-child(odd) {
    padding: 6px 9px;
    border: 1px solid rgba(89, 199, 223, 0.3);
    border-radius: 5px;
    background: rgba(89, 199, 223, 0.08);
    color: var(--accent);
    font-weight: 700;
    text-transform: uppercase;
}

.abstraction-sequence .primitive-step {
    border-color: rgba(240, 179, 91, 0.35);
    background: rgba(240, 179, 91, 0.08);
    color: var(--accent-warm);
}

.paper-method {
    display: grid;
    gap: 20px;
    margin-top: 34px;
}

.paper-figure {
    margin: 0;
}

.paper-figure img {
    width: 100%;
    padding: 18px;
    background: #f7fafc;
    border-radius: 0;
}

.paper-figure figcaption {
    padding: 16px;
    color: var(--muted);
    font-size: 0.94rem;
}

.principles-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 16px;
}

.principle {
    padding: 20px;
}

.principle p {
    margin: 8px 0 0;
    color: var(--muted);
    font-size: 0.94rem;
}

.rl-section {
    padding: 58px 0;
}

.rl-frame,
.rl-caption {
    width: min(740px, 100%);
    margin: 0;
}

.rl-frame {
    box-shadow: var(--shadow);
}

.rl-caption {
    padding-inline: 0;
}

.figure-frame {
    padding: 18px;
    background: #f7fafc;
}

.figure-frame img {
    width: 100%;
    border-radius: 4px;
}

.result-subhead {
    max-width: 820px;
    margin-bottom: 20px;
}

.result-subhead h2 {
    max-width: 760px;
    font-size: 1.42rem;
    line-height: 1.22;
}

.experiment-block {
    margin-top: 62px;
}

.experiment-block:first-of-type {
    margin-top: 54px;
}

.result-copy {
    max-width: 980px;
    margin: 0 0 18px;
    color: #dfe6ef;
    font-size: 1.04rem;
}

pre {
    margin: 0;
    padding: 22px;
    overflow-x: auto;
    border: 1px solid var(--line);
    border-radius: 8px;
    background: #070b11;
    color: #dfe6ef;
    font-family: "Fira Code", ui-monospace, SFMono-Regular, Consolas, monospace;
    font-size: 0.86rem;
    line-height: 1.55;
}

footer {
    padding: 38px 0 54px;
    color: var(--quiet);
    font-size: 0.92rem;
}

@media (max-width: 920px) {
    .topbar-inner {
        width: min(100% - 28px, 1180px);
    }

    .nav {
        display: none;
    }

    .hero {
        min-height: auto;
    }

    .hero-inner {
        width: min(100% - 28px, 1180px);
        padding: 44px 0 44px;
    }

    h1 {
        font-size: 2.35rem;
    }

    .container {
        width: min(100% - 28px, 1180px);
    }

    section {
        padding: 56px 0;
    }

    .abstract-layout {
        grid-template-columns: 1fr;
        gap: 22px;
    }

    .metrics,
    .principles-grid {
        grid-template-columns: 1fr;
    }

    .task-gallery-heading {
        grid-template-columns: 1fr;
        gap: 12px;
    }

    .task-gallery-layout {
        grid-template-columns: 1fr;
    }

    .task-rail {
        max-height: none;
        padding: 2px 0 8px;
        overflow-x: auto;
        overflow-y: hidden;
        flex-direction: row;
    }

    .task-choice {
        min-width: 300px;
    }

    .task-choice:hover {
        transform: translateY(-2px);
    }

    .mixed-control-heading {
        align-items: flex-start;
        flex-direction: column;
        gap: 18px;
    }

    .mixed-control-videos {
        grid-template-columns: 1fr;
    }

    .rl-section {
        padding: 36px 0;
    }

    .rl-frame,
    .rl-caption {
        width: 100%;
    }
}

@media (max-width: 560px) {
    h1 {
        font-size: 2rem;
    }

    h2 {
        font-size: 1.62rem;
    }

    .subtitle {
        font-size: 1.02rem;
    }

    .links {
        display: grid;
        grid-template-columns: 1fr;
    }

    .button {
        width: 100%;
    }

    .task-gallery {
        padding: 14px;
    }

    .task-gallery-heading {
        padding: 2px 0 16px;
    }

    .task-gallery-heading h3,
    .full-run-copy h3,
    .mixed-control-heading h3 {
        font-size: 1.25rem;
    }

    .video-index.static {
        grid-row: 1;
    }

    .task-gallery-heading h3 {
        grid-column: 1 / -1;
        grid-row: 2;
        margin-top: 6px;
    }

    .task-active-topline {
        align-items: flex-end;
    }

    .task-choice {
        min-width: 270px;
        grid-template-columns: 84px minmax(0, 1fr) auto;
    }

    .task-choice img {
        width: 84px;
        height: 54px;
    }

    .full-run-feature,
    .mixed-control-feature {
        padding: 18px;
    }

}

@media (prefers-reduced-motion: reduce) {
    html {
        scroll-behavior: auto;
    }

    .button,
    .gallery-arrow,
    .task-choice {
        transition: none;
    }
}