:root {
  color-scheme: dark;
  --bg: #05090e;
  --surface: #0b151d;
  --raised: #101d27;
  --border: #233440;
  --green: #2eea8b;
  --blue: #64adff;
  --red: #ff6577;
  --text: #f5f8fa;
  --muted: #aebbc5;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background:
    radial-gradient(circle at 90% 0%, rgba(46,234,139,.12), transparent 32rem),
    linear-gradient(rgba(35,52,64,.15) 1px, transparent 1px),
    linear-gradient(90deg, rgba(35,52,64,.15) 1px, transparent 1px),
    var(--bg);
  background-size: auto, 72px 72px, 72px 72px, auto;
  color: var(--text);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, Segoe UI, sans-serif;
  line-height: 1.65;
}

a { color: var(--green); }
.shell { width: min(1080px, calc(100% - 32px)); margin: 0 auto; }
header {
  position: sticky;
  top: 0;
  z-index: 4;
  border-bottom: 1px solid rgba(35,52,64,.9);
  background: rgba(5,9,14,.88);
  backdrop-filter: blur(18px);
}
.nav { min-height: 76px; display: flex; align-items: center; gap: 24px; }
.brand { display: flex; align-items: center; gap: 12px; color: var(--text); text-decoration: none; margin-right: auto; }
.mark {
  width: 44px; height: 44px; display: grid; place-items: center;
  border-radius: 14px; background: var(--green); color: #03140c;
  font-weight: 950; font-size: 22px; transform: rotate(-8deg);
  box-shadow: 0 0 30px rgba(46,234,139,.22);
}
.brand strong { display: block; font-size: 20px; line-height: 1.1; }
.brand small { color: var(--green); font-size: 10px; letter-spacing: 1.8px; font-weight: 800; }
nav a { color: var(--muted); text-decoration: none; font-size: 14px; font-weight: 700; }
nav a:hover { color: var(--text); }
main { padding: 76px 0 90px; }
.hero { max-width: 800px; margin-bottom: 48px; }
.eyebrow { color: var(--green); font-size: 12px; letter-spacing: 2px; font-weight: 900; text-transform: uppercase; }
h1 { font-size: clamp(36px, 7vw, 66px); letter-spacing: -2.8px; line-height: 1.02; margin: 12px 0 18px; }
.lead { color: var(--muted); font-size: clamp(17px, 2.4vw, 21px); max-width: 720px; }
.meta { display: flex; gap: 10px; flex-wrap: wrap; margin-top: 24px; }
.pill { border: 1px solid var(--border); background: rgba(16,29,39,.84); border-radius: 999px; padding: 7px 12px; color: var(--muted); font-size: 12px; }
.layout { display: grid; grid-template-columns: 230px minmax(0,1fr); gap: 30px; align-items: start; }
.toc { position: sticky; top: 106px; padding: 20px; border: 1px solid var(--border); border-radius: 20px; background: rgba(11,21,29,.88); }
.toc strong { font-size: 12px; letter-spacing: 1px; color: var(--green); }
.toc a { display: block; margin-top: 11px; color: var(--muted); text-decoration: none; font-size: 13px; }
.toc a:hover { color: var(--text); }
.card { padding: clamp(22px,4vw,38px); border: 1px solid var(--border); border-radius: 24px; background: rgba(11,21,29,.9); box-shadow: 0 24px 70px rgba(0,0,0,.22); }
section + section { margin-top: 32px; padding-top: 32px; border-top: 1px solid var(--border); }
h2 { margin: 0 0 10px; font-size: 24px; letter-spacing: -.4px; }
p, li { color: var(--muted); }
ul { padding-left: 22px; }
.action { display: inline-flex; align-items: center; justify-content: center; gap: 8px; min-height: 48px; padding: 0 18px; border-radius: 13px; text-decoration: none; font-weight: 850; background: var(--green); color: #03140c; }
.action.danger { background: var(--red); color: #180308; }
.note { padding: 16px; border-left: 3px solid var(--blue); border-radius: 0 12px 12px 0; background: rgba(100,173,255,.08); }
footer { padding: 26px 0 40px; border-top: 1px solid var(--border); color: #71818d; font-size: 12px; }

@media (max-width: 760px) {
  .layout { grid-template-columns: 1fr; }
  .toc { position: static; }
  .nav nav { display: none; }
  main { padding-top: 48px; }
}