:root {
  color-scheme: dark light;
  --bg: #080e20;
  --surface: #111c34;
  --raised: #1b2945;
  --accent: #75dfff;
  --violet: #ae9bff;
  --text: #f1f5ff;
  --muted: #aab9d3;
  --line: #293b60;
  --ink: #081328;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-synthesis: none;
  scroll-behavior: smooth;
  scroll-padding-top: 28px;
}
* { box-sizing: border-box; }
body { margin: 0; background: radial-gradient(ellipse 800px 600px at 100% 0, #ae9bff12, transparent 75%), var(--bg); color: var(--text); line-height: 1.75; }
a { color: var(--accent); text-underline-offset: 4px; }
a:hover { text-decoration-thickness: 2px; }
a:focus-visible, video:focus-visible { outline: 3px solid var(--accent); outline-offset: 5px; border-radius: 6px; }
.wrap { width: min(1120px, calc(100% - 80px)); margin-inline: auto; }
.header { display: flex; align-items: center; justify-content: space-between; gap: 24px; padding-block: 28px; border-bottom: 1px solid var(--line); }
.brand { display: flex; align-items: center; gap: 13px; color: var(--text); text-decoration: none; font-size: 21px; font-weight: 700; line-height: 1.15; letter-spacing: -.6px; }
.brand-sub { display: block; color: var(--muted); font-size: 9px; font-weight: 500; letter-spacing: 1.4px; text-transform: uppercase; margin-top: 7px; }
.brand-icon { display: grid; place-items: center; width: 48px; height: 48px; flex-shrink: 0; border-radius: 15px; background: linear-gradient(130deg, var(--accent), var(--violet)); }
.brand-icon span { display: grid; place-items: center; width: 29px; height: 22px; padding-left: 2px; border-radius: 5px; color: var(--accent); background: var(--ink); font-size: 13px; }
.top-nav { display: flex; flex-wrap: wrap; gap: 4px; padding: 5px; background: var(--surface); border: 1px solid var(--line); border-radius: 15px; }
.top-nav a { padding: 7px 14px; border-radius: 10px; color: var(--muted); text-decoration: none; font-size: 12px; font-weight: 600; }
.top-nav a:hover { color: var(--text); background: var(--raised); }
.top-nav a[aria-current="page"] { background: var(--accent); color: var(--ink); }
.hero { max-width: 850px; padding: 72px 0 46px; }
.eyebrow, .summary-card > span { color: var(--accent); font-family: ui-monospace, SFMono-Regular, Consolas, monospace; font-size: 10px; font-weight: 600; letter-spacing: 1.7px; }
h1 { font-size: clamp(42px, 6.5vw, 74px); line-height: 1.08; letter-spacing: -3.5px; margin: 24px 0; font-weight: 700; }
h1 span { color: var(--accent); }
.hero-intro { color: var(--muted); max-width: 610px; font-size: 17px; line-height: 1.8; margin: 0; }
h2 { font-weight: 650; letter-spacing: -.7px; line-height: 1.3; }
p { margin: 0 0 16px; }
p:last-child { margin-bottom: 0; }
.summary-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; margin: 0 0 48px; }
.summary-card { border: 1px solid var(--line); background: var(--surface); padding: 25px; border-radius: 18px; }
.summary-card h2 { font-size: 21px; margin: 22px 0 12px; }
.summary-card p { font-size: 13px; color: var(--muted); }
.document-layout { display: grid; grid-template-columns: 230px minmax(0, 1fr); gap: 56px; margin-bottom: 64px; align-items: start; }
.contents { position: sticky; top: 28px; padding-top: 10px; }
.contents nav { display: flex; flex-direction: column; gap: 5px; margin-top: 20px; }
.contents nav a { display: flex; gap: 12px; color: var(--muted); font-size: 12px; line-height: 1.5; padding: 8px 0; text-decoration: none; }
.contents nav a:hover { color: var(--accent); }
.contents nav span { color: var(--violet); font-size: 10px; padding-top: 1px; }
.revision { font-size: 10px; color: var(--muted); border-top: 1px solid var(--line); padding-top: 20px; margin-top: 24px; }
.revision time { display: block; }
.document { min-width: 0; border: 1px solid var(--line); border-radius: 22px; padding: 8px 32px; background: var(--surface); }
.document-section { display: grid; grid-template-columns: 24px minmax(0, 1fr); gap: 14px; padding-block: 30px; border-bottom: 1px solid var(--line); }
.document-section:last-child { border: 0; }
.section-number { font: 10px ui-monospace, SFMono-Regular, monospace; color: var(--violet); padding-top: 8px; }
.document-section h2 { margin: 0 0 18px; font-size: 23px; }
.document-section p, .document-section li, .document-section dd { font-size: 14px; color: var(--muted); line-height: 1.9; }
strong { color: var(--text); font-weight: 600; }
ol, ul { padding-left: 21px; margin: 0 0 20px; }
li { padding-left: 4px; margin-bottom: 12px; }
.note { border-left: 3px solid var(--violet); background: var(--raised); border-radius: 0 12px 12px 0; padding: 16px 18px; color: var(--muted); font-size: 13px; margin-block: 22px; }
.note strong { display: block; margin-bottom: 5px; }
dl { margin: 0; }
dt { font-size: 14px; font-weight: 600; margin-top: 20px; }
dd { margin: 6px 0 20px; }
table { border-collapse: collapse; width: 100%; font-size: 12px; margin-block: 24px; }
caption { text-align: left; color: var(--text); font-weight: 600; margin-bottom: 12px; }
th, td { border-bottom: 1px solid var(--line); padding: 12px 10px; text-align: left; vertical-align: top; }
th { color: var(--text); background: var(--raised); font-size: 11px; }
td { color: var(--muted); }
th:first-child { width: 35%; }
.demo-panel { display: grid; grid-template-columns: .9fr 1.1fr; gap: 38px; align-items: center; border: 1px solid var(--line); border-radius: 24px; padding: 32px; background: linear-gradient(130deg, var(--surface), var(--bg)); margin-bottom: 24px; }
.demo-panel h2 { font-size: 32px; margin: 20px 0; }
.demo-panel p, .contact-panel p { font-size: 14px; color: var(--muted); }
video { display: block; width: 100%; aspect-ratio: 16/9; border-radius: 15px; background: #080e20; border: 1px solid var(--line); }
.primary-link { display: inline-flex; align-items: center; justify-content: space-between; gap: 24px; padding: 12px 20px; background: linear-gradient(120deg, var(--accent), var(--violet)); color: var(--ink); border-radius: 12px; font-size: 12px; font-weight: 650; text-decoration: none; }
.primary-link:hover { filter: brightness(1.08); }
.resource-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.resource-card { display: block; border: 1px solid var(--line); background: var(--surface); color: var(--text); text-decoration: none; padding: 25px; border-radius: 18px; }
.resource-card:hover { border-color: var(--violet); background: var(--raised); }
.resource-card h2 { font-size: 21px; margin: 22px 0 12px; }
.resource-card p { font-size: 13px; color: var(--muted); }
.contact-panel { display: flex; gap: 30px; justify-content: space-between; align-items: center; margin: 28px 0 64px; padding: 30px 0; }
.contact-panel h2 { font-size: 26px; margin: 12px 0; }
.contact-panel .primary-link { flex-shrink: 0; }
.footer { display: flex; justify-content: space-between; align-items: start; gap: 25px; border-top: 1px solid var(--line); padding: 30px 0 40px; }
.footer strong { font-size: 14px; }
.footer p { color: var(--muted); font-size: 11px; margin: 6px 0 0; }
.footer-links { display: flex; flex-wrap: wrap; gap: 12px 22px; padding-top: 4px; }
.footer-links a { font-size: 11px; color: var(--muted); text-decoration: none; }
.footer-links a:hover { color: var(--accent); }
.skip-link { position: absolute; top: -100px; left: 20px; z-index: 10; background: var(--accent); color: var(--ink); padding: 10px 20px; }
.skip-link:focus { top: 10px; }
.empty-action { margin-bottom: 70px; }
@media (max-width: 850px) {
  .wrap { width: calc(100% - 48px); }
  .document-layout { grid-template-columns: 180px minmax(0, 1fr); gap: 28px; }
  .document { padding-inline: 22px; }
  .summary-card, .resource-card { padding: 20px; }
  .demo-panel { grid-template-columns: 1fr; gap: 28px; }
  .footer { flex-direction: column; }
}
@media (max-width: 620px) {
  .wrap { width: calc(100% - 36px); }
  .header { align-items: start; flex-direction: column; gap: 20px; padding-block: 22px; }
  .top-nav { width: 100%; justify-content: space-between; }
  .top-nav a { padding: 8px 12px; }
  .hero { padding: 42px 0 32px; }
  h1 { font-size: clamp(36px, 10.5vw, 48px); letter-spacing: -1.8px; }
  .hero-intro { font-size: 15px; }
  .summary-grid, .resource-grid { grid-template-columns: 1fr; gap: 12px; }
  .summary-grid { margin-bottom: 28px; }
  .summary-card h2, .resource-card h2 { margin-top: 14px; }
  .document-layout { display: block; margin-bottom: 36px; }
  .contents { position: static; padding: 0 0 24px; }
  .contents nav { display: grid; grid-template-columns: 1fr 1fr; gap: 4px 16px; }
  .contents nav a { font-size: 11px; gap: 8px; }
  .revision { margin-top: 12px; padding-top: 12px; }
  .revision time { display: inline; }
  .document { padding: 0 18px; border-radius: 18px; }
  .document-section { grid-template-columns: 1fr; gap: 10px; padding-block: 24px; }
  .section-number { padding: 0; }
  .document-section h2 { font-size: 21px; }
  th, td { padding: 10px 7px; font-size: 11px; overflow-wrap: anywhere; }
  .demo-panel { padding: 22px; border-radius: 18px; }
  .demo-panel h2 { font-size: 28px; }
  .contact-panel { align-items: start; flex-direction: column; gap: 20px; margin-bottom: 32px; }
}
@media (prefers-color-scheme: light) {
  :root { --bg: #f1f4fc; --surface: #fff; --raised: #e5ecf8; --accent: #2461ad; --violet: #7052c8; --text: #14213b; --muted: #53637f; --line: #d4deef; --ink: #fff; }
  .brand-icon span { color: #fff; background: #14213b; }
}
@media (prefers-reduced-motion: reduce) { :root { scroll-behavior: auto; } }