:root {
  --paper: #fbfaf7;
  --surface: #ffffff;
  --surface-soft: #f2f5f8;
  --ink: #17263f;
  --ink-soft: #536078;
  --muted: #7e8899;
  --line: #dfe5ec;
  --navy: #203a61;
  --blue: #5384d8;
  --lavender: #8875d1;
  --coral: #ed6a6a;
  --mint: #66ae8c;
  --sand: #d99f58;
  --obs: #5384d8;
  --mem: #66ae8c;
  --ans: #8875d1;
  --radius: 24px;
  --shadow: 0 24px 70px rgba(38, 58, 86, .12);
  --shadow-soft: 0 12px 36px rgba(38, 58, 86, .08);
  --max: 1120px;
  --wide: 1360px;
}
* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
[id] { scroll-margin-top: 96px; }
body { font-family: 'DM Sans', system-ui, sans-serif; color: var(--ink); background: var(--paper); line-height: 1.65; -webkit-font-smoothing: antialiased; }
a { color: inherit; text-decoration: none; }
button { font: inherit; }
img { display: block; max-width: 100%; }
code { font-family: 'JetBrains Mono', monospace; }
sup { font-size: .62em; }
.container { max-width: var(--max); margin: 0 auto; }
.wide-container { max-width: var(--wide); margin: 0 auto; }
.section { padding: 7rem 2rem; }
.section-soft { background: var(--surface-soft); }

.nav { position: sticky; top: 0; z-index: 50; border-bottom: 1px solid rgba(223, 229, 236, .85); background: rgba(251, 250, 247, .86); backdrop-filter: blur(16px); }
.nav-inner { max-width: var(--wide); margin: 0 auto; padding: .85rem 2rem; min-height: 66px; display: flex; align-items: center; justify-content: space-between; gap: 2rem; }
.nav-logo, .footer-brand { display: inline-flex; align-items: center; gap: .65rem; font-family: 'Manrope', sans-serif; font-weight: 800; letter-spacing: -.03em; }
.live-dot { width: 11px; height: 11px; border-radius: 50%; background: var(--coral); box-shadow: 0 0 0 6px rgba(237, 106, 106, .13); }
.nav-links { display: flex; gap: 1.8rem; }
.nav-links a { position: relative; color: var(--ink-soft); font-weight: 600; font-size: .9rem; transition: color .2s; }
.nav-links a::after { content: ''; position: absolute; left: 0; right: 100%; bottom: -.45rem; height: 2px; background: var(--coral); transition: right .2s; }
.nav-links a:hover, .nav-links a.active { color: var(--ink); }
.nav-links a.active::after { right: 0; }
.nav-github { padding: .55rem .9rem; border: 1px solid var(--line); border-radius: 999px; background: var(--surface); font-size: .85rem; font-weight: 700; transition: transform .2s, box-shadow .2s; }
.nav-github:hover { transform: translateY(-2px); box-shadow: var(--shadow-soft); }

.hero { position: relative; min-height: 700px; display: grid; place-items: center; overflow: hidden; padding: 7rem 2rem 5.5rem; background: linear-gradient(180deg, #f6f8fc 0%, var(--paper) 92%); text-align: center; }
.hero::before { content: ''; position: absolute; inset: 0; opacity: .38; background-image: radial-gradient(rgba(32, 58, 97, .15) .7px, transparent .7px); background-size: 22px 22px; mask-image: linear-gradient(to bottom, #000, transparent 78%); }
.hero-orb { position: absolute; width: 480px; height: 480px; border-radius: 50%; filter: blur(3px); opacity: .35; }
.orb-one { top: -250px; left: -160px; background: radial-gradient(circle, rgba(83,132,216,.5), transparent 68%); }
.orb-two { top: -270px; right: -170px; background: radial-gradient(circle, rgba(136,117,209,.45), transparent 68%); }
.hero-content { position: relative; z-index: 1; max-width: 1320px; }
.eyebrow { display: inline-flex; align-items: center; gap: .6rem; padding: .45rem .85rem; border: 1px solid var(--line); border-radius: 999px; color: var(--ink-soft); background: rgba(255,255,255,.75); font-size: .78rem; font-weight: 700; letter-spacing: .08em; text-transform: uppercase; }
.pulse { width: 8px; height: 8px; border-radius: 50%; background: var(--coral); animation: pulse 2s infinite; }
.hero h1 { margin-top: 1.5rem; font-family: 'Manrope', sans-serif; font-size: clamp(2.15rem, 3.4vw, 2.75rem); line-height: 1.12; letter-spacing: -.045em; font-weight: 800; }
.hero h1 > span:last-child { background: linear-gradient(100deg, var(--blue), var(--lavender) 52%, var(--coral)); -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent; }
.hero h1 .title-name { color: var(--ink); font-variant-caps: small-caps; letter-spacing: -.02em; -webkit-text-fill-color: var(--ink); }
.hero-sub { margin-top: 1.7rem; font-family: 'Manrope', sans-serif; color: var(--navy); font-size: clamp(1.05rem, 2.3vw, 1.45rem); font-weight: 700; }
.hero-tag { max-width: 780px; margin: 1rem auto 0; color: var(--ink-soft); font-size: 1.05rem; }
.hero-tag b { color: var(--ink); }
.cta { margin-top: 2rem; display: flex; justify-content: center; flex-wrap: wrap; gap: .75rem; }
.btn { min-height: 48px; display: inline-flex; align-items: center; justify-content: center; gap: .65rem; padding: .7rem 1.2rem; border: 1px solid var(--line); border-radius: 999px; background: var(--surface); color: var(--ink); font-weight: 700; box-shadow: 0 4px 18px rgba(32,58,97,.06); transition: transform .2s, box-shadow .2s; }
a.btn:hover { transform: translateY(-2px); box-shadow: var(--shadow-soft); }
.btn-primary { color: #fff; border-color: var(--navy); background: var(--navy); }
.btn-disabled { color: var(--muted); cursor: not-allowed; }
.btn-disabled small { padding: .12rem .4rem; border-radius: 999px; background: var(--surface-soft); font-size: .65rem; text-transform: uppercase; letter-spacing: .05em; }
.authors { max-width: 900px; margin: 2.2rem auto 0; display: flex; flex-wrap: wrap; justify-content: center; gap: .25rem 1.2rem; font-size: .93rem; }
.affil { margin-top: .7rem; display: flex; flex-wrap: wrap; justify-content: center; gap: .2rem 1.1rem; color: var(--ink-soft); font-size: .82rem; }
.affil-note { margin-top: .3rem; color: var(--muted); font-size: .76rem; }

.showcase { padding: 5rem 2rem 4rem; }
.trajectory-section { border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); background: #f7f3ec; }
.trajectory-section + #overview { padding-top: 6rem; }
.section-heading { max-width: 760px; }
.section-heading.centered { margin: 0 auto; text-align: center; }
.kicker { margin-bottom: .65rem; color: var(--coral); font-size: .76rem; font-weight: 800; letter-spacing: .14em; text-transform: uppercase; }
.section-heading h2 { font-family: 'Manrope', sans-serif; font-size: clamp(2.2rem, 4.5vw, 3.6rem); line-height: 1.12; letter-spacing: -.045em; }
.section-heading p { margin-top: 1rem; color: var(--ink-soft); font-size: 1.05rem; }
.hero-figure { margin-top: 2.5rem; padding: .75rem; border: 1px solid var(--line); border-radius: 30px; background: var(--surface); box-shadow: var(--shadow); }
.hero-figure img { width: 100%; border-radius: 20px; }
.hero-figure figcaption, .paper-figure figcaption { padding: .8rem .5rem .25rem; color: var(--muted); text-align: center; font-size: .84rem; }

.cases-section { padding-top: 4rem; }
.cases-header { display: flex; align-items: flex-end; justify-content: space-between; gap: 3rem; margin-bottom: 2rem; }
.case-tabs { flex: none; display: flex; gap: .5rem; padding: .35rem; border: 1px solid var(--line); border-radius: 999px; background: var(--surface); box-shadow: var(--shadow-soft); }
.case-tab { display: flex; align-items: center; gap: .45rem; padding: .6rem .85rem; border: 0; border-radius: 999px; color: var(--ink-soft); background: transparent; cursor: pointer; font-weight: 700; font-size: .86rem; transition: color .2s, background .2s; }
.case-tab.active { color: var(--ink); background: var(--surface-soft); }
.tab-dot, .dist-key i { display: inline-block; width: 8px; height: 8px; border-radius: 50%; }
.obs-dot { background: var(--obs); }.mem-dot { background: var(--mem); }.ans-dot { background: var(--ans); }
.case-stage { display: grid; grid-template-columns: minmax(0, 1.8fr) minmax(280px, .7fr); overflow: hidden; border: 1px solid var(--line); border-radius: 30px; background: var(--surface); box-shadow: var(--shadow); }
.case-media { position: relative; min-width: 0; padding: .75rem; background: #edf1f5; }
.case-media video { width: 100%; height: 100%; min-height: 440px; object-fit: contain; border-radius: 20px; background: #e5eaf0; transition: opacity .16s, transform .16s; }
.case-media video.switching { opacity: .2; transform: scale(.995); }
.media-badge { position: absolute; top: 1.5rem; left: 1.5rem; display: flex; align-items: center; gap: .5rem; padding: .42rem .65rem; border-radius: 999px; color: #fff; background: rgba(23,38,63,.82); backdrop-filter: blur(10px); font-size: .68rem; font-weight: 800; letter-spacing: .08em; }
.case-copy { padding: 2.2rem; display: flex; flex-direction: column; justify-content: center; background: linear-gradient(160deg, #fff, #f5f3fb); }
.case-index { color: var(--lavender); font-size: .72rem; letter-spacing: .14em; font-weight: 800; }
.case-copy h3 { margin-top: .8rem; font-family: 'Manrope', sans-serif; font-size: clamp(1.5rem, 2.3vw, 2.15rem); line-height: 1.18; letter-spacing: -.035em; }
.case-copy > p { margin-top: 1rem; color: var(--ink-soft); }
.case-copy code { color: var(--lavender); font-weight: 700; }
.case-decision { margin-top: 1.6rem; padding: 1rem; display: flex; align-items: center; gap: .9rem; border: 1px solid var(--line); border-radius: 16px; background: rgba(255,255,255,.72); }
.decision-token { min-width: 54px; height: 54px; display: grid; place-items: center; border-radius: 14px; color: #fff; font-family: 'JetBrains Mono', monospace; font-size: .78rem; font-weight: 700; }
.ans-token { background: var(--ans); }.obs-token { background: var(--obs); }.mem-token { background: var(--mem); }
.case-decision div { display: flex; flex-direction: column; }
.case-decision small { color: var(--muted); font-size: .65rem; letter-spacing: .09em; font-weight: 800; }
.case-decision strong { margin-top: .15rem; font-size: .9rem; }
.case-progress { margin-top: 1.5rem; }
.case-progress-label { margin-bottom: .55rem; display: flex; align-items: center; justify-content: space-between; color: var(--muted); font-size: .64rem; font-weight: 800; letter-spacing: .09em; }
.case-progress-label strong { color: var(--ink-soft); font-family: 'JetBrains Mono', monospace; font-size: .68rem; }
.case-play-toggle { display: inline-flex; align-items: center; gap: .38rem; padding: 0; border: 0; color: var(--muted); background: transparent; cursor: pointer; font: inherit; letter-spacing: inherit; }
.case-play-toggle:hover, .case-play-toggle:focus-visible { color: var(--lavender); outline: none; }
.play-icon { min-width: 12px; color: var(--lavender); font-family: 'JetBrains Mono', monospace; font-size: .7rem; letter-spacing: -.15em; }
.case-progress-track { display: grid; grid-template-columns: repeat(18, 1fr); gap: 3px; }
.turn-step { height: 7px; overflow: hidden; padding: 0; border: 0; border-radius: 999px; background: var(--line); cursor: pointer; transition: transform .18s, background .18s; }
.turn-step:hover, .turn-step:focus-visible { transform: scaleY(1.65); background: #ced6e1; outline: none; }
.turn-step i { display: block; width: 0; height: 100%; border-radius: inherit; background: linear-gradient(90deg, var(--blue), var(--lavender)); pointer-events: none; }
.turn-step.completed i { width: 100%; }
.turn-step.active { box-shadow: 0 0 0 2px rgba(136,117,209,.14); }

.state-grid { margin-top: 3rem; display: grid; grid-template-columns: repeat(3, 1fr); gap: 1rem; }
.state-card { min-height: 270px; padding: 1.7rem; border: 1px solid var(--line); border-radius: var(--radius); background: var(--surface); transform: translateY(18px); opacity: 0; transition: transform .55s, opacity .55s, box-shadow .2s; }
.state-card:hover { transform: translateY(-4px) !important; box-shadow: var(--shadow-soft); }
.state-card.is-visible { transform: none; opacity: 1; }
.state-top { display: flex; align-items: center; justify-content: space-between; }
.state-top span { color: var(--muted); font-size: .74rem; font-weight: 800; }
.state-top code { padding: .32rem .55rem; border-radius: 8px; font-size: .82rem; }
.obs-card code { color: var(--obs); background: rgba(83,132,216,.12); }.mem-card code { color: var(--mem); background: rgba(102,174,140,.13); }.ans-card code { color: var(--ans); background: rgba(136,117,209,.13); }
.state-card h3 { margin-top: 3.5rem; font-family: 'Manrope', sans-serif; font-size: 1.8rem; }
.state-card p { margin-top: .6rem; color: var(--ink-soft); }
.signal-strip { margin-top: 1rem; padding: 1rem 1.2rem; display: flex; flex-wrap: wrap; gap: .7rem; border: 1px solid var(--line); border-radius: 18px; background: rgba(255,255,255,.55); }
.signal-strip span { padding: .35rem .7rem; border-radius: 999px; background: var(--surface); color: var(--ink-soft); font-size: .78rem; font-weight: 700; }

.split-heading { max-width: none; display: grid; grid-template-columns: 1.2fr .8fr; gap: 4rem; align-items: end; }
.split-heading p { margin: 0 0 .25rem; }
.feature-grid { margin-top: 3rem; display: grid; grid-template-columns: repeat(3, 1fr); gap: 1rem; }
.feature { min-height: 210px; padding: 1.5rem; border: 1px solid var(--line); border-radius: var(--radius); background: var(--surface); opacity: 0; transform: translateY(18px); transition: opacity .55s, transform .55s, box-shadow .2s; }
.feature.is-visible { opacity: 1; transform: none; }
.feature:hover { box-shadow: var(--shadow-soft); }
.feature-wide { grid-column: span 2; background: linear-gradient(135deg, #eef3fb, #f5f2fb); }
.feature-accent { color: #fff; background: var(--navy); }
.feature-num { color: var(--coral); font-size: .72rem; font-weight: 800; }
.feature h3 { margin-top: 2.5rem; font-family: 'Manrope', sans-serif; font-size: 1.25rem; }
.feature p { margin-top: .45rem; color: var(--ink-soft); font-size: .92rem; }
.feature-accent p { color: #c9d4e3; }

.paper-figure { margin-top: 2.5rem; padding: .65rem; border: 1px solid var(--line); border-radius: var(--radius); background: var(--surface); box-shadow: var(--shadow-soft); }
.paper-figure img { border-radius: 16px; }
.method-grid { margin-top: 2rem; display: grid; grid-template-columns: repeat(4, 1fr); gap: 1rem; }
.method-grid article { padding: 1.35rem; border-top: 2px solid var(--blue); background: rgba(255,255,255,.55); opacity: 0; transform: translateY(18px); transition: .55s; }
.method-grid article.is-visible { opacity: 1; transform: none; }
.method-grid span { color: var(--blue); font-size: .72rem; font-weight: 800; }
.method-grid h3 { margin-top: 1rem; font-family: 'Manrope', sans-serif; font-size: 1.05rem; }
.method-grid p { margin-top: .4rem; color: var(--ink-soft); font-size: .86rem; }

.stat-grid { margin-top: 3rem; display: grid; grid-template-columns: repeat(4, 1fr); border: 1px solid var(--line); border-radius: var(--radius); background: var(--surface); box-shadow: var(--shadow-soft); }
.stat { padding: 1.5rem; text-align: center; opacity: 0; transform: translateY(12px); transition: .5s; }
.stat.is-visible { opacity: 1; transform: none; }
.stat + .stat { border-left: 1px solid var(--line); }
.stat strong { display: block; font-family: 'Manrope', sans-serif; font-size: 2rem; letter-spacing: -.04em; }
.stat strong span { font-size: 1rem; }.stat small { color: var(--muted); }
.distribution { margin-top: 1.5rem; padding: 1.2rem 1.4rem; border: 1px solid var(--line); border-radius: 18px; background: var(--surface); }
.distribution > span { font-size: .78rem; font-weight: 800; text-transform: uppercase; letter-spacing: .08em; }
.dist-bar { height: 12px; display: flex; overflow: hidden; margin-top: .8rem; border-radius: 999px; }
.dist-bar i { height: 100%; }.dist-obs { width: 48.2%; background: var(--obs); }.dist-mem { width: 25.9%; background: var(--mem); }.dist-ans { width: 25.9%; background: var(--ans); }
.dist-key { margin-top: .65rem; display: flex; gap: 1rem; color: var(--ink-soft); font-size: .76rem; }
.dist-key span { display: flex; align-items: center; gap: .35rem; }
.table-title { margin-top: 2.6rem; font-family: 'Manrope', sans-serif; font-size: 1.2rem; }.table-title small { margin-left: .5rem; color: var(--muted); font-family: 'DM Sans'; font-weight: 500; }
.table-scroll { margin-top: 1rem; overflow-x: auto; border: 1px solid var(--line); border-radius: 18px; box-shadow: var(--shadow-soft); }
table.results { min-width: 800px; width: 100%; border-collapse: collapse; background: var(--surface); font-size: .84rem; }
table.results th, table.results td { padding: .9rem .65rem; border-bottom: 1px solid var(--line); text-align: center; }
table.results th { color: var(--ink-soft); background: #eef2f6; font-size: .74rem; text-transform: uppercase; letter-spacing: .04em; }
table.results td:first-child, table.results th:first-child { text-align: left; font-weight: 700; }
table.results .muted { color: var(--muted); }.results .best { background: rgba(136,117,209,.08); }.results .best td:first-child { color: var(--lavender); }
.result-note { margin-top: 1.4rem; padding: 1.4rem 1.5rem; display: grid; grid-template-columns: .6fr 1.4fr; gap: 1.5rem; border-left: 3px solid var(--coral); background: rgba(237,106,106,.06); }
.result-note p { color: var(--ink-soft); }

.roles-section { color: #fff; background: var(--navy); }
.roles-section .kicker { color: #f69a8e; }.roles-section .section-heading h2 { color: #fff; }
.role-grid { margin-top: 3rem; display: grid; grid-template-columns: repeat(3, 1fr); gap: 1rem; }
.role-grid article { min-height: 230px; padding: 1.7rem; border: 1px solid rgba(255,255,255,.14); border-radius: var(--radius); background: rgba(255,255,255,.06); opacity: 0; transform: translateY(18px); transition: .55s; }
.role-grid article.is-visible { opacity: 1; transform: none; }
.role-grid span { color: #8db3f0; font-size: .72rem; letter-spacing: .12em; font-weight: 800; }
.role-grid h3 { margin-top: 3rem; font-family: 'Manrope', sans-serif; font-size: 1.35rem; }
.role-grid p { margin-top: .55rem; color: #bdc9da; }
.closing { max-width: 800px; margin: 3.5rem auto 0; text-align: center; color: #bdc9da; font-size: 1.35rem; }.closing strong { color: #fff; }

.cite-section { background: #ede9e1; }
.text-link { color: var(--navy); font-weight: 700; text-decoration: underline; text-decoration-color: rgba(32, 58, 97, .3); text-underline-offset: .2em; }
.text-link:hover { text-decoration-color: var(--coral); }
.cite-layout { display: grid; grid-template-columns: .7fr 1.3fr; gap: 4rem; align-items: start; }
.cite-card { position: relative; overflow: auto; border-radius: var(--radius); color: #e8edf5; background: #1c2940; box-shadow: var(--shadow); }
.cite-card pre { padding: 2rem; font-size: .78rem; line-height: 1.8; }
.cite-card button { position: absolute; top: 1rem; right: 1rem; padding: .4rem .7rem; border: 1px solid rgba(255,255,255,.2); border-radius: 999px; color: #fff; background: rgba(255,255,255,.1); cursor: pointer; font-size: .72rem; font-weight: 700; }
.footer { padding: 3rem 2rem; color: #bdc9da; background: #17243a; }
.footer .container { display: grid; grid-template-columns: auto 1fr auto; gap: 2rem; align-items: center; }
.footer p { text-align: center; font-size: .78rem; }.footer > div > div { display: flex; gap: 1rem; color: #91a3bd; font-size: .78rem; }.footer a:hover { color: #fff; }

.reveal { opacity: 0; transform: translateY(20px); transition: opacity .65s, transform .65s; }.reveal.is-visible { opacity: 1; transform: none; }
@keyframes pulse { 0%,100% { box-shadow: 0 0 0 0 rgba(237,106,106,.35); } 50% { box-shadow: 0 0 0 7px rgba(237,106,106,0); } }

@media (max-width: 980px) {
  .nav-links { display: none; }
  .hero { min-height: auto; }
  .cases-header, .split-heading { grid-template-columns: 1fr; display: grid; gap: 2rem; }
  .case-tabs { justify-self: start; }
  .case-stage { grid-template-columns: 1fr; }
  .case-media video { min-height: 0; }
  .state-grid, .feature-grid, .method-grid, .role-grid { grid-template-columns: repeat(2, 1fr); }
  .feature-wide { grid-column: span 1; }
  .cite-layout { grid-template-columns: 1fr; gap: 2rem; }
  .footer .container { grid-template-columns: 1fr; text-align: center; }.footer > div > div { justify-content: center; }
}
@media (max-width: 680px) {
  .section { padding: 5rem 1.15rem; }.showcase { padding: 3.5rem 1rem 2rem; }.nav-inner { padding: .75rem 1rem; }.nav-github { display: none; }
  .hero { padding: 5.5rem 1.1rem 4rem; }.hero h1 { font-size: clamp(2rem, 9vw, 2.7rem); }.hero-tag { font-size: .96rem; }
  .authors { font-size: .84rem; }.affil { font-size: .75rem; }
  .section-heading h2 { font-size: 2.2rem; }.section-heading p { font-size: .98rem; }
  .hero-figure { padding: .35rem; border-radius: 18px; }.hero-figure img { border-radius: 13px; }
  .case-tabs { width: 100%; overflow-x: auto; justify-content: flex-start; }.case-stage { border-radius: 20px; }.case-media { padding: .4rem; }.case-media video { border-radius: 15px; }.case-copy { padding: 1.5rem; }
  .state-grid, .feature-grid, .method-grid, .role-grid, .stat-grid { grid-template-columns: 1fr; }
  .state-card { min-height: 220px; }.state-card h3 { margin-top: 2rem; }
  .stat + .stat { border-left: 0; border-top: 1px solid var(--line); }
  .result-note { grid-template-columns: 1fr; gap: .5rem; }.dist-key { flex-wrap: wrap; }
  .cite-card pre { padding: 4rem 1.2rem 1.4rem; font-size: .7rem; }
}
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } *, *::before, *::after { animation-duration: .01ms !important; animation-iteration-count: 1 !important; transition-duration: .01ms !important; } }