:root {
  --ink: #102a43;
  --ink-soft: #183b56;
  --paper: #f6f7f4;
  --paper-2: #e9eff2;
  --white: #fffdf8;
  --muted: #a7b2c3;
  --text: #172235;
  --cyan: #5dd9ff;
  --cyan-deep: #087ea4;
  --violet: #a88cff;
  --violet-deep: #6950b8;
  --lime: #b9f6cb;
  --amber: #ffcb70;
  --line-dark: rgba(255, 255, 255, .13);
  --line-light: rgba(7, 16, 29, .14);
  --shadow: 0 24px 70px rgba(5, 12, 23, .15);
  --radius: 22px;
  --content: 1180px;
  --font-sans: Inter, "Avenir Next", Avenir, "Segoe UI", Helvetica, Arial, sans-serif;
  --font-mono: "SFMono-Regular", Consolas, "Liberation Mono", monospace;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  overflow-x: clip;
  background: var(--paper);
  color: var(--text);
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}
body::before {
  position: fixed;
  inset: 0;
  z-index: 100;
  pointer-events: none;
  display: none;
  content: "";
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 180 180' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='.55'/%3E%3C/svg%3E");
}

a { color: inherit; }
img, svg { display: block; max-width: 100%; }
button, input { font: inherit; }
::selection { background: var(--cyan); color: var(--ink); }

.skip-link {
  position: fixed;
  top: 10px;
  left: 10px;
  z-index: 1000;
  padding: 10px 14px;
  border-radius: 10px;
  background: var(--white);
  color: var(--ink);
  transform: translateY(-160%);
}
.skip-link:focus { transform: translateY(0); }

.shell { width: min(calc(100% - 40px), var(--content)); margin-inline: auto; }
.section { padding: 76px 0; }
.section--compact { padding: 70px 0; }
.section--dark { background: #1d3f59; color: var(--white); }
.section--white { background: var(--white); }
.section--rule { border-top: 1px solid var(--line-light); }

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  border-bottom: 1px solid var(--line-light);
  background: rgba(255, 253, 248, .94);
  color: var(--ink);
  backdrop-filter: blur(18px);
}
.nav-wrap { min-height: 74px; display: flex; align-items: center; justify-content: space-between; gap: 26px; }
.brand { display: inline-flex; align-items: center; gap: 12px; text-decoration: none; }
.brand-mark { width: 38px; height: 38px; }
.brand-name { font-size: 1.03rem; font-weight: 850; letter-spacing: .12em; }
.brand-event { color: var(--muted); font-size: .74rem; letter-spacing: .08em; text-transform: uppercase; }
.nav-links { display: flex; align-items: center; gap: 5px; }
.nav-links a {
  padding: 8px 11px;
  border-radius: 9px;
  color: #4f6274;
  font-size: .88rem;
  font-weight: 650;
  text-decoration: none;
  transition: background .2s, color .2s;
}
.nav-links a:hover, .nav-links a[aria-current="page"] { background: rgba(16, 42, 67, .08); color: var(--ink); }
.nav-links .nav-cta { margin-left: 5px; border: 1px solid rgba(8, 126, 164, .3); color: var(--cyan-deep); }
.nav-toggle { display: none; border: 0; background: transparent; color: var(--ink); cursor: pointer; }
.nav-toggle span { display: block; width: 24px; height: 2px; margin: 5px 0; background: currentColor; }

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  margin: 0 0 17px;
  color: var(--cyan-deep);
  font-family: var(--font-mono);
  font-size: 1rem;
  font-weight: 800;
  line-height: 1.45;
  letter-spacing: .09em;
  text-transform: uppercase;
}
.section--dark .eyebrow { color: var(--cyan); }
.hero .eyebrow { color: var(--cyan-deep); }
.eyebrow::before { width: 24px; height: 2px; background: currentColor; content: ""; }
h1, h2, h3 { margin-top: 0; line-height: 1.08; letter-spacing: -.035em; }
h1 { font-size: clamp(3.5rem, 8vw, 7.6rem); }
h2 { margin-bottom: 22px; font-size: clamp(2.15rem, 4.5vw, 4rem); }
h3 { margin-bottom: 12px; font-size: clamp(1.28rem, 2.2vw, 1.7rem); }
p { margin-top: 0; }
.lede { max-width: 740px; color: #536074; font-size: clamp(1.05rem, 1.6vw, 1.28rem); }
.section--dark .lede { color: #b8c2d1; }
.section-head { display: flex; align-items: end; justify-content: space-between; gap: 30px; margin-bottom: 48px; }
.section-head > div:first-child { max-width: 820px; }
.section-head h2 { margin-bottom: 13px; }
.section-head p { margin-bottom: 0; }

.hero {
  position: relative;
  min-height: 610px;
  overflow: hidden;
  background: linear-gradient(135deg, #edf7f8 0%, #f7f5ef 58%, #f0edf8 100%);
  color: var(--ink);
}
.hero::after {
  position: absolute;
  inset: auto -10% -55% 34%;
  width: 850px;
  height: 850px;
  border: 1px solid rgba(8, 126, 164, .16);
  border-radius: 50%;
  box-shadow: 0 0 0 90px rgba(93, 217, 255, .04), 0 0 0 180px rgba(168, 140, 255, .025);
  content: "";
}
.hero-grid {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 1.18fr .82fr;
  gap: 78px;
  align-items: center;
  padding: 78px 0 88px;
}
.hero-grid > *, .split > * { min-width: 0; }
.hero h1 { max-width: 760px; margin: 0 0 23px; font-size: clamp(2.8rem, 5.6vw, 5.25rem); line-height: 1.02; }
.hero h1 span { display: block; margin-top: 12px; color: var(--cyan-deep); font-size: .48em; font-weight: 650; letter-spacing: -.025em; -webkit-text-stroke: 0; }
.hero-copy { max-width: 690px; color: #465b6e; font-size: clamp(1.05rem, 1.45vw, 1.23rem); }
.hero-actions, .button-row { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 31px; }
.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 9px;
  min-height: 48px;
  padding: 12px 18px;
  border: 1px solid transparent;
  border-radius: 12px;
  background: var(--ink);
  color: var(--white);
  font-size: .88rem;
  font-weight: 780;
  text-decoration: none;
  transition: transform .2s, box-shadow .2s, background .2s;
}
.button:hover { transform: translateY(-2px); box-shadow: 0 10px 24px rgba(5, 12, 23, .16); }
.button--primary { background: var(--cyan); color: var(--ink); }
.button--light { background: var(--white); color: var(--ink); }
.button--outline { border-color: rgba(255, 255, 255, .28); background: transparent; }
.button--paper { border-color: var(--line-light); background: transparent; color: var(--ink); }
.button--disabled { border-color: var(--line-light); background: rgba(255,255,255,.04); color: #7e8999; cursor: default; pointer-events: none; }
.button svg { width: 17px; height: 17px; }

.hero-panel {
  position: relative;
  min-height: 430px;
  border: 1px solid rgba(16, 42, 67, .14);
  border-radius: 30px;
  background: rgba(255, 255, 255, .72);
  box-shadow: 0 28px 70px rgba(16, 42, 67, .12);
}
.signal-map { position: absolute; inset: 26px; }
.signal-label { position: absolute; font-family: var(--font-mono); font-size: .68rem; letter-spacing: .07em; text-transform: uppercase; }
.signal-label--one { top: 0; left: 0; color: var(--cyan-deep); }
.signal-label--two { right: 0; bottom: 0; color: var(--violet); }
.time-axis { position: absolute; top: 39%; left: 4%; right: 4%; height: 1px; background: rgba(93,217,255,.45); }
.time-axis::before, .time-axis::after { position: absolute; top: -3px; width: 7px; height: 7px; border-radius: 50%; background: var(--cyan); content: ""; }
.time-axis::before { left: 0; } .time-axis::after { right: 0; }
.time-node { position: absolute; top: calc(39% - 18px); width: 38px; height: 38px; border: 1px solid var(--cyan-deep); border-radius: 50%; background: var(--white); box-shadow: 0 0 24px rgba(8,126,164,.12); }
.time-node:nth-of-type(1) { left: 14%; }
.time-node:nth-of-type(2) { left: 45%; }
.time-node:nth-of-type(3) { right: 13%; }
.conversation { position: absolute; inset: 54% 4% 4%; }
.bubble { position: absolute; max-width: 78%; padding: 11px 14px; border-radius: 13px; color: var(--ink); font-size: .74rem; line-height: 1.4; }
.bubble--q { left: 0; background: rgba(168,140,255,.17); border: 1px solid rgba(168,140,255,.42); }
.bubble--a { right: 0; top: 55px; background: var(--paper-2); border: 1px solid var(--line-light); }
.bubble--q2 { left: 8%; top: 125px; background: rgba(168,140,255,.17); border: 1px solid rgba(168,140,255,.42); }
.reason-link { position: absolute; top: 113px; left: 38%; width: 95px; border-top: 1px dashed var(--violet); transform: rotate(20deg); transform-origin: left; }
.panel-badge { position: absolute; right: 22px; top: 22px; width: 53px; height: 53px; display: grid; place-items: center; border-radius: 50%; background: var(--lime); color: var(--ink); font-family: var(--font-mono); font-size: .65rem; font-weight: 900; }

.announcement { border-bottom: 1px solid var(--line-light); background: var(--amber); color: var(--ink); }
.announcement .shell { min-height: 48px; display: flex; align-items: center; justify-content: center; gap: 12px; font-size: .84rem; font-weight: 700; text-align: center; }
.announcement code { font-family: var(--font-mono); font-size: .7rem; letter-spacing: .07em; text-transform: uppercase; }

.stat-grid { display: grid; grid-template-columns: repeat(4, 1fr); border-top: 1px solid var(--line-light); border-left: 1px solid var(--line-light); }
.stat { min-height: 150px; padding: 26px; border-right: 1px solid var(--line-light); border-bottom: 1px solid var(--line-light); }
.stat strong { display: block; margin-bottom: 7px; color: var(--ink); font-size: clamp(2rem, 3.7vw, 3.25rem); line-height: 1; letter-spacing: -.045em; }
.stat span { color: #657084; font-size: .84rem; }

.track-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 22px; }
.track-card { position: relative; min-height: 430px; overflow: hidden; padding: 38px; border: 1px solid var(--line-dark); border-radius: var(--radius); background: var(--ink-soft); }
.track-card::after { position: absolute; right: -90px; bottom: -130px; width: 300px; height: 300px; border: 1px solid currentColor; border-radius: 50%; opacity: .16; content: ""; }
.track-card--time { color: var(--cyan); }
.track-card--talk { color: var(--violet); }
.track-number { font-family: var(--font-mono); font-size: .92rem; font-weight: 850; line-height: 1.4; letter-spacing: .09em; text-transform: uppercase; }
.track-card h3 { max-width: 420px; margin: 105px 0 18px; color: var(--white); font-size: clamp(2rem, 3.7vw, 3.2rem); }
.track-card p { max-width: 510px; color: #bac4d2; }
.pill-row { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 25px; }
.pill { padding: 6px 10px; border: 1px solid currentColor; border-radius: 999px; font-family: var(--font-mono); font-size: .66rem; letter-spacing: .04em; }
.track-card--soft { min-height: 330px; border-color: var(--line-light); background: var(--white); box-shadow: 0 16px 40px rgba(16,42,67,.07); }
.track-card--soft.track-card--time { color: var(--cyan-deep); }
.track-card--soft.track-card--talk { color: var(--violet-deep); }
.track-card--soft h3 { margin-top: 70px; color: var(--ink); font-size: clamp(1.8rem, 3.2vw, 2.7rem); }
.track-card--soft p { color: #536579; }

.organizer-band { padding: 44px 0 48px; border-top: 1px solid var(--line-light); border-bottom: 1px solid var(--line-light); background: var(--white); }
.organizer-band-head { display: flex; align-items: baseline; gap: 22px; margin-bottom: 25px; }
.organizer-band-head .eyebrow { margin: 0; }
.organizer-band-head h2 { margin: 0; font-size: 1.35rem; letter-spacing: -.02em; }
.organizer-row { display: grid; grid-template-columns: repeat(5, 1fr); gap: 13px; }
.organizer-card { padding: 18px 17px; border-left: 2px solid #aacdd8; background: #f7faf9; }
.organizer-card:nth-child(3), .organizer-card:nth-child(4) { border-color: #c8bce9; }
.organizer-card h3 { margin: 0 0 9px; font-size: .96rem; letter-spacing: -.015em; }
.organizer-card p { min-height: 40px; margin: 0 0 10px; color: #536579; font-size: .76rem; line-height: 1.4; }
.organizer-card span { color: #718094; font-family: var(--font-mono); font-size: .61rem; font-weight: 750; letter-spacing: .04em; text-transform: uppercase; }

.resource-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 14px; }
.resource-card { min-height: 235px; padding: 25px; border: 1px solid var(--line-light); border-radius: 17px; background: var(--paper); text-decoration: none; transition: transform .2s, border-color .2s, box-shadow .2s; }
.resource-card:hover { transform: translateY(-3px); border-color: rgba(8,126,164,.38); box-shadow: 0 14px 32px rgba(16,42,67,.08); }
.resource-card code { color: var(--cyan-deep); font-family: var(--font-mono); font-size: .66rem; font-weight: 900; letter-spacing: .08em; }
.resource-card:nth-child(n+3) code { color: var(--violet-deep); }
.resource-card h3 { margin: 42px 0 10px; font-size: 1.14rem; }
.resource-card p { color: #5e6e80; font-size: .82rem; }
.resource-card span { color: var(--cyan-deep); font-size: .78rem; font-weight: 780; }

.schedule-strip { background: #eef4f5; }
.schedule-grid { display: grid; grid-template-columns: 1.1fr .9fr; gap: 65px; align-items: center; }
.schedule-grid h2 { font-size: clamp(2rem, 3.8vw, 3.35rem); }
.schedule-note { padding: 27px; border: 1px solid rgba(8,126,164,.18); border-radius: 17px; background: rgba(255,255,255,.72); }
.schedule-note > strong { display: block; margin-bottom: 7px; color: var(--ink); font-size: 1.05rem; }
.schedule-note > p { margin: 0; color: #536579; font-size: .86rem; }

.subtask-list { display: grid; grid-template-columns: repeat(5, 1fr); gap: 12px; margin-top: 32px; }
.subtask { min-height: 176px; padding: 21px; border: 1px solid var(--line-light); border-radius: 16px; background: rgba(255,255,255,.4); }
.subtask code { color: var(--cyan-deep); font-family: var(--font-mono); font-size: .74rem; font-weight: 900; }
.subtask:nth-child(n+3) code { color: var(--violet-deep); }
.subtask h3 { margin: 24px 0 8px; font-size: 1.03rem; letter-spacing: -.02em; }
.subtask p { margin: 0; color: #687386; font-size: .82rem; line-height: 1.5; }

.split { display: grid; grid-template-columns: .9fr 1.1fr; gap: 85px; align-items: start; }
.metric-card { padding: 30px; border-radius: var(--radius); background: var(--white); box-shadow: var(--shadow); }
.metric-primary { display: flex; align-items: center; justify-content: space-between; gap: 20px; padding-bottom: 26px; border-bottom: 1px solid var(--line-light); }
.metric-primary strong { font-size: clamp(2.4rem, 5vw, 4.6rem); letter-spacing: -.06em; }
.metric-primary span { max-width: 175px; color: #647084; font-size: .8rem; text-align: right; }
.metric-list { margin: 22px 0 0; padding: 0; list-style: none; }
.metric-list li { display: flex; justify-content: space-between; gap: 20px; padding: 11px 0; border-bottom: 1px solid rgba(7,16,29,.08); font-size: .87rem; }
.metric-list li:last-child { border: 0; }
.metric-list span { color: #6c7789; text-align: right; }

.timeline { position: relative; margin-top: 45px; }
.timeline::before { position: absolute; top: 8px; bottom: 8px; left: 8px; width: 1px; background: rgba(255,255,255,.2); content: ""; }
.timeline-item { position: relative; display: grid; grid-template-columns: 180px 1fr; gap: 28px; padding: 0 0 31px 42px; }
.timeline-item::before { position: absolute; top: 7px; left: 3px; width: 11px; height: 11px; border: 2px solid var(--ink); border-radius: 50%; background: var(--cyan); box-shadow: 0 0 0 1px var(--cyan); content: ""; }
.timeline-item time { color: var(--cyan); font-family: var(--font-mono); font-size: .78rem; font-weight: 800; }
.timeline-item h3 { margin-bottom: 5px; font-size: 1rem; letter-spacing: -.01em; }
.timeline-item p { margin: 0; color: #aeb9c8; font-size: .82rem; }
.timeline-item--future::before { background: var(--ink); }
.timeline--light::before { background: rgba(16,42,67,.17); }
.timeline--light .timeline-item::before { border-color: var(--white); }
.timeline--light .timeline-item--future::before { background: var(--white); border-color: var(--cyan-deep); }
.timeline--light .timeline-item time { color: var(--cyan-deep); }
.timeline--light .timeline-item p { color: #5e6e80; }

.news-grid { display: grid; grid-template-columns: 1fr 1fr 1fr; gap: 18px; }
.news-card { min-height: 220px; padding: 27px; border: 1px solid var(--line-light); border-radius: 17px; background: rgba(255,255,255,.42); }
.news-card time { color: var(--cyan-deep); font-family: var(--font-mono); font-size: .69rem; font-weight: 800; text-transform: uppercase; }
.news-card h3 { margin: 42px 0 10px; font-size: 1.2rem; }
.news-card p { color: #667184; font-size: .86rem; }

.people-grid { display: grid; grid-template-columns: repeat(5, 1fr); gap: 13px; }
.person { padding: 22px 18px; border-top: 2px solid var(--ink); background: rgba(255,255,255,.45); }
.person-initials { width: 46px; height: 46px; display: grid; place-items: center; margin-bottom: 38px; border-radius: 50%; background: var(--ink); color: var(--white); font-family: var(--font-mono); font-size: .72rem; }
.person h3 { margin-bottom: 6px; font-size: 1rem; }
.person p { margin: 0; color: #667184; font-size: .76rem; line-height: 1.45; }

.page-hero { position: relative; overflow: hidden; padding: 62px 0 54px; border-bottom: 1px solid var(--line-light); background: #f7f9fa; color: var(--ink); }
.page-hero::after { display: none; }
.page-hero h1 { max-width: 990px; margin-bottom: 20px; font-size: clamp(2.5rem, 5vw, 4.25rem); }
.page-hero .lede { color: #52667a; }
.breadcrumbs { margin-bottom: 40px; color: #708095; font-family: var(--font-mono); font-size: .7rem; text-transform: uppercase; }
.breadcrumbs a { text-decoration: none; }
.breadcrumbs span { margin: 0 9px; color: #506078; }

.toc-layout { display: grid; grid-template-columns: 240px 1fr; gap: 75px; align-items: start; }
.toc { position: sticky; top: 105px; padding: 19px; border: 1px solid var(--line-light); border-radius: 14px; background: rgba(255,255,255,.42); }
.toc strong { display: block; margin-bottom: 12px; font-family: var(--font-mono); font-size: .68rem; letter-spacing: .08em; text-transform: uppercase; }
.toc a { display: block; padding: 7px 0; color: #606d80; font-size: .8rem; text-decoration: none; }
.toc a:hover { color: var(--cyan-deep); }
.prose { max-width: 820px; }
.prose > section { margin-bottom: 78px; scroll-margin-top: 110px; }
.prose h2 { font-size: clamp(1.9rem, 3.3vw, 3rem); }
.prose h3 { margin-top: 34px; }
.prose p, .prose li { color: #48566a; }
.prose a { color: #087597; text-underline-offset: 3px; }
.prose ul, .prose ol { padding-left: 1.25rem; }
.prose li { margin-bottom: 8px; }
.callout { margin: 27px 0; padding: 22px 24px; border-left: 3px solid var(--cyan-deep); background: var(--white); }
.callout--violet { border-color: var(--violet-deep); }
.callout--amber { border-color: #b77910; }
.callout strong { display: block; margin-bottom: 5px; color: var(--ink); }

.io-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 13px; margin: 25px 0; }
.io-card { padding: 22px; border: 1px solid var(--line-light); border-radius: 15px; background: rgba(255,255,255,.46); }
.io-card small { color: var(--cyan-deep); font-family: var(--font-mono); font-weight: 800; text-transform: uppercase; }
.io-card h3 { margin: 22px 0 8px; font-size: 1.05rem; }
.io-card p { margin: 0; font-size: .86rem; }

.code-block { position: relative; overflow-x: auto; margin: 24px 0; padding: 23px; border-radius: 15px; background: var(--ink); color: #d7e0ec; font: .78rem/1.65 var(--font-mono); }
.code-block code { white-space: pre; }
.code-label { display: block; margin-bottom: 13px; color: var(--cyan); font-size: .65rem; letter-spacing: .08em; text-transform: uppercase; }

.data-table-wrap { overflow-x: auto; margin: 25px 0; border: 1px solid var(--line-light); border-radius: 14px; background: var(--white); }
.data-table { width: 100%; border-collapse: collapse; font-size: .82rem; }
.data-table th, .data-table td { padding: 14px 17px; border-bottom: 1px solid rgba(7,16,29,.1); text-align: left; white-space: nowrap; }
.data-table th { background: var(--paper-2); color: #566174; font-family: var(--font-mono); font-size: .66rem; letter-spacing: .05em; text-transform: uppercase; }
.data-table tr:last-child td { border-bottom: 0; }
.data-table td:first-child { font-weight: 750; }

.paper-list { display: grid; gap: 18px; }
.paper-card {
  padding: 30px;
  border: 1px solid var(--line-light);
  border-radius: 18px;
  background: var(--white);
}
.paper-card h3 { margin-bottom: 10px; font-size: clamp(1.25rem, 2.5vw, 1.8rem); }
.paper-authors { margin-bottom: 6px; color: #536074; font-size: .9rem; }
.paper-venue { color: var(--cyan-deep); font-family: var(--font-mono); font-size: .72rem; font-weight: 800; letter-spacing: .03em; }
.paper-summary { margin: 24px 0 0; color: #59667a; }
.paper-actions { display: flex; flex-wrap: wrap; gap: 9px; margin-top: 22px; }
.citation-wrap { position: relative; margin-top: 24px; }
.citation-wrap .code-block { margin: 0; padding-top: 50px; }
.copy-button {
  position: absolute;
  z-index: 2;
  top: 11px;
  right: 11px;
  padding: 7px 10px;
  border: 1px solid rgba(255,255,255,.22);
  border-radius: 8px;
  background: rgba(255,255,255,.07);
  color: #dbe5f2;
  font-family: var(--font-mono);
  font-size: .65rem;
  cursor: pointer;
}
.copy-button:hover { border-color: var(--cyan); color: var(--cyan); }

.sample-frame { margin: 26px 0; overflow: hidden; border: 1px solid var(--line-light); border-radius: 18px; background: var(--white); }
.sample-head { display: flex; align-items: center; justify-content: space-between; gap: 20px; padding: 18px 22px; border-bottom: 1px solid var(--line-light); background: var(--paper-2); }
.sample-head strong { font-size: .9rem; }
.sample-head code { color: var(--cyan-deep); font-family: var(--font-mono); font-size: .68rem; }
.sample-body { padding: 25px; }
.sample-query { margin-bottom: 22px; font-size: 1.06rem; font-weight: 720; line-height: 1.45; }
.sample-meta { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 18px; }
.sample-meta span { padding: 5px 9px; border-radius: 999px; background: var(--paper-2); color: #5b687b; font-family: var(--font-mono); font-size: .64rem; }
.sample-turn { margin: 0 0 11px; padding: 15px 17px; border-radius: 13px; background: var(--paper); }
.sample-turn strong { display: block; margin-bottom: 4px; color: var(--violet-deep); font-family: var(--font-mono); font-size: .68rem; text-transform: uppercase; }
.sample-turn p { margin: 0; color: #48566a; font-size: .88rem; }
.download-card { display: flex; align-items: center; justify-content: space-between; gap: 30px; margin: 28px 0; padding: 27px; border-radius: 18px; background: var(--cyan); color: var(--ink); }
.download-card h3 { margin-bottom: 7px; }
.download-card p { margin: 0; color: #294052; font-size: .85rem; }

.phase-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.phase { padding: 25px; border: 1px solid var(--line-light); border-radius: 16px; background: var(--white); }
.phase code { color: var(--cyan-deep); font-family: var(--font-mono); font-size: .72rem; font-weight: 800; }
.phase h3 { margin: 42px 0 9px; font-size: 1.15rem; }
.phase p { margin: 0; color: #667184; font-size: .83rem; }

.faq { border-top: 1px solid var(--line-light); }
.faq details { border-bottom: 1px solid var(--line-light); }
.faq summary { position: relative; padding: 23px 44px 23px 0; cursor: pointer; font-weight: 760; list-style: none; }
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { position: absolute; right: 4px; content: "+"; color: var(--cyan-deep); font-size: 1.5rem; font-weight: 400; }
.faq details[open] summary::after { content: "−"; }
.faq details p { max-width: 780px; padding: 0 0 24px; color: #5b687b; }

.cta-band { padding: 48px 0; border-top: 1px solid var(--line-light); background: #edf3f5; color: var(--ink); }
.cta-band .shell { display: flex; align-items: center; justify-content: space-between; gap: 50px; }
.cta-band h2 { max-width: 780px; margin: 0; font-size: clamp(1.6rem, 3vw, 2.35rem); }

.site-footer { padding: 55px 0 28px; border-top: 1px solid var(--line-light); background: #f3f5f6; color: var(--ink); }
.footer-grid { display: grid; grid-template-columns: 1.6fr repeat(3, .7fr); gap: 55px; }
.footer-brand p { max-width: 420px; margin-top: 20px; color: #5d6b7c; font-size: .86rem; }
.footer-col strong { display: block; margin-bottom: 15px; color: var(--ink); font-family: var(--font-mono); font-size: .67rem; letter-spacing: .08em; text-transform: uppercase; }
.footer-col a { display: block; margin: 8px 0; color: #526477; font-size: .82rem; text-decoration: none; }
.footer-col a:hover { color: var(--cyan-deep); }
.footer-bottom { display: flex; justify-content: space-between; gap: 20px; margin-top: 50px; padding-top: 23px; border-top: 1px solid var(--line-light); color: #6a7787; font-size: .73rem; }

/* Academic shared-task homepage */
.academic-home { background: #fff; }
.academic-intro { padding: 72px 0 48px; border-bottom: 1px solid #dce2e7; background: #f8fafb; }
.academic-intro-inner { max-width: 980px; }
.task-kicker { margin-bottom: 13px; color: #087397; font-size: 1rem; font-weight: 750; letter-spacing: .02em; }
.academic-intro h1 { max-width: 940px; margin-bottom: 18px; color: #142f49; font-size: clamp(2.55rem, 4.2vw, 3.75rem); line-height: 1.1; letter-spacing: -.03em; }
.academic-summary { max-width: 850px; margin-bottom: 18px; color: #40556a; font-size: 1.3rem; line-height: 1.55; }
.status-note { display: inline-block; margin-bottom: 34px; padding: 8px 12px; border-left: 3px solid #1684a6; background: #eaf4f7; color: #27465a; font-size: .92rem; }
.intro-organizers { padding-top: 27px; border-top: 1px solid #d7dee4; }
.intro-organizers h2 { margin-bottom: 19px; font-size: 1.25rem; letter-spacing: -.015em; }
.intro-organizers ul { display: grid; grid-template-columns: repeat(5, 1fr); gap: 18px; margin: 0; padding: 0; list-style: none; }
.intro-organizers li { min-width: 0; }
.intro-organizers strong, .intro-organizers span { display: block; }
.intro-organizers strong { margin-bottom: 4px; color: #17324b; font-size: .9rem; line-height: 1.35; }
.intro-organizers span { color: #647284; font-size: .76rem; line-height: 1.4; }
.organizer-role { margin: 16px 0 0; color: #6a7787; font-size: .76rem; }
.academic-layout { display: grid; grid-template-columns: minmax(0, 760px) 280px; gap: 80px; align-items: start; padding-top: 62px; padding-bottom: 80px; }
.academic-content section { margin-bottom: 54px; scroll-margin-top: 100px; }
.academic-content section:last-child { margin-bottom: 0; }
.academic-content h2 { margin: 0 0 18px; padding-bottom: 9px; border-bottom: 1px solid #dce2e7; color: #17324b; font-size: 1.85rem; letter-spacing: -.02em; }
.academic-content h3 { margin: 31px 0 11px; color: #213c54; font-size: 1.25rem; letter-spacing: -.015em; }
.academic-content p, .academic-content li { color: #344b60; font-size: 1.02rem; line-height: 1.75; }
.academic-content ul { padding-left: 1.3rem; }
.academic-content li { margin-bottom: 8px; }
.academic-content a, .academic-sidebar a, .academic-footer a { color: #087397; text-decoration-thickness: 1px; text-underline-offset: 3px; }
.plain-link-list { margin-top: 21px; }
.academic-sidebar { position: sticky; top: 98px; border-left: 1px solid #dce2e7; padding-left: 27px; }
.academic-sidebar section { margin-bottom: 35px; }
.academic-sidebar h2 { margin-bottom: 13px; color: #17324b; font-size: 1.05rem; letter-spacing: 0; }
.academic-sidebar p, .academic-sidebar li, .academic-sidebar dt, .academic-sidebar dd { color: #526477; font-size: .84rem; line-height: 1.55; }
.date-list { margin: 0; }
.date-list div { padding: 10px 0; border-bottom: 1px solid #e1e6ea; }
.date-list dt { color: #263f55; font-weight: 750; }
.date-list dd { margin: 2px 0 0; }
.sidebar-note { margin-top: 14px; }
.sidebar-links { margin: 0; padding-left: 1.1rem; }
.sidebar-links li { margin-bottom: 7px; }
.academic-footer { padding: 34px 0; border-top: 1px solid #dce2e7; background: #f5f7f8; }
.academic-footer p { margin: 5px 0; color: #5c6a79; font-size: .79rem; }
.academic-footer strong { color: #213b52; }

/* Academic documentation pages */
.page-hero .shell { max-width: var(--content); }
.page-hero .breadcrumbs { margin-bottom: 25px; }
.page-hero .eyebrow { margin-bottom: 10px; color: #087397; font-family: var(--font-sans); font-size: .92rem; letter-spacing: .02em; text-transform: none; }
.page-hero .eyebrow::before { display: none; }
.page-hero h1 { max-width: 860px; margin-bottom: 13px; font-size: clamp(2.35rem, 4.3vw, 3.7rem); letter-spacing: -.03em; }
.page-hero .lede { max-width: 820px; margin-bottom: 0; font-size: 1.1rem; line-height: 1.65; }
.toc-layout { grid-template-columns: 190px minmax(0, 800px); gap: 65px; justify-content: center; }
.toc { padding: 0 22px 0 0; border: 0; border-right: 1px solid #dce2e7; border-radius: 0; background: transparent; }
.toc strong { color: #263f55; font-family: var(--font-sans); font-size: .78rem; letter-spacing: .02em; text-transform: none; }
.toc a { padding: 5px 0; color: #5b6b7c; font-size: .79rem; }
.prose { max-width: 800px; }
.prose > section { margin-bottom: 58px; }
.prose > section > .eyebrow { margin-bottom: 9px; font-family: var(--font-sans); font-size: .78rem; letter-spacing: .03em; }
.prose > section > .eyebrow::before { width: 16px; }
.prose h2 { margin-bottom: 17px; padding-bottom: 9px; border-bottom: 1px solid #dce2e7; color: #17324b; font-size: clamp(1.65rem, 2.8vw, 2.25rem); }
.prose h3 { color: #263f55; font-size: 1.18rem; letter-spacing: -.01em; }
.prose p, .prose li { color: #354c60; font-size: .98rem; line-height: 1.72; }
.io-grid, .phase-grid { gap: 12px; }
.io-card, .phase { border-radius: 3px; background: #f7f9fa; }
.io-card { padding: 18px; }
.io-card h3 { margin-top: 14px; }
.phase { padding: 20px; }
.phase h3 { margin-top: 22px; }
.paper-card { padding: 24px 0; border: 0; border-top: 1px solid #dce2e7; border-radius: 0; background: transparent; }
.paper-card h3 { font-size: 1.35rem; }
.paper-summary { margin-top: 17px; }
.button { min-height: 42px; padding: 9px 14px; border-radius: 4px; font-size: .82rem; }
.callout { padding: 18px 20px; background: #f3f7f8; }
.metric-card { padding: 23px; border: 1px solid #dce2e7; border-radius: 4px; box-shadow: none; }
.metric-primary strong { font-size: clamp(2rem, 4vw, 3rem); }
.sample-frame { border-radius: 4px; }
.sample-head { padding: 14px 17px; }
.sample-body { padding: 20px; }
.sample-turn { border-radius: 3px; }
.download-card { padding: 22px; border: 1px solid #b9d7df; border-radius: 4px; background: #edf6f8; }
.data-table-wrap { border-radius: 3px; }
.code-block { border-radius: 4px; }
.faq summary { padding-top: 18px; padding-bottom: 18px; }
main > .cta-band { display: none; }
.timeline--light { margin-top: 12px; }
.timeline--light .timeline-item { grid-template-columns: 145px 1fr; }
.timeline--light .timeline-item h3 { font-size: 1rem; }
.timeline--light .timeline-item p { font-size: .82rem; }
.page-hero + .section > .shell.split { max-width: 1040px; gap: 60px; }
.page-hero + .section > .shell.split h2 { font-size: clamp(1.9rem, 3.5vw, 2.7rem); }
.page-hero + .section > .shell.split .lede { font-size: 1rem; line-height: 1.7; }

.reveal { opacity: 0; transform: translateY(18px); transition: opacity .65s ease, transform .65s ease; }
.reveal.is-visible { opacity: 1; transform: none; }

@media (max-width: 980px) {
  .hero-grid, .split { grid-template-columns: 1fr; }
  .hero-panel { min-height: 430px; }
  .stat-grid { grid-template-columns: 1fr 1fr; }
  .subtask-list { grid-template-columns: repeat(2, 1fr); }
  .people-grid { grid-template-columns: repeat(3, 1fr); }
  .organizer-row { grid-template-columns: repeat(3, 1fr); }
  .resource-grid { grid-template-columns: 1fr 1fr; }
  .toc-layout { grid-template-columns: 1fr; }
  .toc { position: relative; top: auto; display: flex; flex-wrap: wrap; gap: 0 18px; padding: 0 0 17px; border-right: 0; border-bottom: 1px solid #dce2e7; }
  .toc strong { width: 100%; }
  .footer-grid { grid-template-columns: 1.3fr 1fr 1fr; }
  .footer-brand { grid-column: 1 / -1; }
  .intro-organizers ul { grid-template-columns: repeat(3, 1fr); }
  .academic-layout { grid-template-columns: minmax(0, 1fr) 250px; gap: 45px; }
}

@media (max-width: 880px) {
  .shell { width: min(calc(100% - 28px), var(--content)); }
  .section { padding: 76px 0; }
  .nav-toggle { display: block; }
  .nav-links { position: absolute; top: 74px; left: 0; right: 0; display: none; padding: 14px; border-top: 1px solid var(--line-light); background: var(--white); box-shadow: 0 16px 30px rgba(16,42,67,.12); }
  .nav-links.is-open { display: grid; }
  .nav-links a { padding: 11px 13px; }
  .nav-links .nav-cta { margin: 4px 0 0; }
  .hero { min-height: 0; }
  .hero-grid, .split { grid-template-columns: minmax(0, 1fr); }
  .hero-grid { padding: 78px 0; gap: 50px; }
  .hero h1 { font-size: clamp(3rem, 15vw, 5rem); }
  .hero h1 span { font-size: .48em; letter-spacing: -.025em; }
  .announcement .shell { flex-wrap: wrap; gap: 3px 10px; padding: 8px 0; line-height: 1.35; }
  .hero-panel { min-height: 400px; }
  .section-head { display: block; }
  .track-grid, .news-grid, .phase-grid, .io-grid { grid-template-columns: 1fr; }
  .track-card { min-height: 380px; padding: 28px; }
  .track-card h3 { margin-top: 90px; }
  .subtask-list { grid-template-columns: 1fr; }
  .people-grid { grid-template-columns: 1fr 1fr; }
  .organizer-row { grid-template-columns: 1fr 1fr; }
  .schedule-grid { grid-template-columns: 1fr; gap: 32px; }
  .timeline-item { grid-template-columns: 1fr; gap: 4px; }
  .cta-band .shell, .footer-bottom { align-items: flex-start; flex-direction: column; }
  .download-card { align-items: flex-start; flex-direction: column; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .footer-brand { grid-column: 1 / -1; }
  .academic-intro { padding: 52px 0 38px; }
  .academic-layout { grid-template-columns: 1fr; padding-top: 48px; padding-bottom: 60px; }
  .academic-sidebar { position: static; padding: 32px 0 0; border-top: 1px solid #dce2e7; border-left: 0; }
  .page-hero { padding: 48px 0 42px; }
}

@media (max-width: 480px) {
  .brand-event { display: none; }
  .stat-grid, .people-grid, .organizer-row, .resource-grid, .footer-grid { grid-template-columns: 1fr; }
  .organizer-band-head { display: block; }
  .organizer-band-head .eyebrow { margin-bottom: 10px; }
  .eyebrow { font-size: .86rem; letter-spacing: .07em; }
  .track-number { font-size: .84rem; }
  .footer-brand { grid-column: auto; }
  .hero-actions .button { width: 100%; }
  .hero-panel { min-height: 360px; }
  .bubble { max-width: 88%; }
  .intro-organizers ul { grid-template-columns: 1fr 1fr; gap: 17px; }
  .academic-intro h1 { font-size: 2.45rem; }
  .academic-summary { font-size: 1.08rem; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation-duration: .01ms !important; animation-iteration-count: 1 !important; transition-duration: .01ms !important; }
  .reveal { opacity: 1; transform: none; }
}