:root {
  color-scheme: dark;
  --bg: #07090f;
  --panel: #111722;
  --text: #f7f4ec;
  --muted: #aeb7c7;
  --accent: #5dd9c8;
  --line: rgba(255, 255, 255, 0.12);
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  min-height: 100vh;
  background:
    radial-gradient(circle at 12% 0%, rgba(93, 217, 200, 0.16), transparent 30rem),
    linear-gradient(180deg, #0b1019, var(--bg) 58%);
  color: var(--text);
  font: 16px/1.65 ui-sans-serif, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}
a { color: var(--accent); text-underline-offset: 0.18em; }
a:focus-visible { outline: 3px solid var(--accent); outline-offset: 4px; border-radius: 4px; }
.shell { width: min(920px, calc(100% - 32px)); margin: 0 auto; }
header { border-bottom: 1px solid var(--line); }
nav { min-height: 72px; display: flex; align-items: center; justify-content: space-between; gap: 24px; }
.brand { color: var(--text); font-weight: 760; letter-spacing: 0.08em; text-decoration: none; }
.nav-links { display: flex; flex-wrap: wrap; gap: 18px; }
.nav-links a { color: var(--muted); text-decoration: none; }
main { padding: 72px 0 88px; }
.eyebrow { color: var(--accent); font-size: 0.82rem; font-weight: 700; letter-spacing: 0.13em; text-transform: uppercase; }
h1 { max-width: 18ch; margin: 12px 0 22px; font-size: clamp(2.35rem, 8vw, 5.5rem); line-height: 0.98; letter-spacing: -0.045em; }
h2 { margin-top: 0; font-size: clamp(1.35rem, 4vw, 2rem); }
.lede { max-width: 62ch; color: var(--muted); font-size: clamp(1.05rem, 2.5vw, 1.25rem); }
.grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 18px; margin-top: 48px; }
.card { padding: 28px; border: 1px solid var(--line); border-radius: 24px; background: rgba(17, 23, 34, 0.84); }
.card p { color: var(--muted); }
.notice { margin-top: 40px; padding: 20px 22px; border-left: 3px solid var(--accent); background: rgba(93, 217, 200, 0.08); }
footer { padding: 28px 0 42px; border-top: 1px solid var(--line); color: var(--muted); }
footer .shell { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 16px; }
@media (max-width: 680px) {
  nav { align-items: flex-start; flex-direction: column; padding: 20px 0; }
  .grid { grid-template-columns: 1fr; }
  main { padding-top: 52px; }
}
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }