:root {
  color-scheme: dark;
  --bg: #050505;
  --panel: #111111;
  --line: #2a2a2a;
  --text: #f5f1e8;
  --muted: #aaa49a;
  --accent: #ff6818;
  font-family: Inter, ui-sans-serif, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background:
    radial-gradient(circle at 80% 0%, rgba(255, 104, 24, .14), transparent 28rem),
    var(--bg);
  color: var(--text);
  font-size: 16px;
  line-height: 1.65;
}

a { color: inherit; }

.shell {
  width: min(960px, calc(100% - 40px));
  margin: 0 auto;
}

header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 84px;
  border-bottom: 1px solid var(--line);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
  font-weight: 800;
  letter-spacing: -.02em;
}

.mark {
  display: grid;
  place-items: center;
  width: 42px;
  height: 42px;
  border-radius: 12px;
  background: var(--accent);
  color: #080808;
  font-size: 18px;
  font-weight: 900;
}

nav { display: flex; gap: 20px; }
nav a { color: var(--muted); text-decoration: none; font-size: .9rem; }
nav a:hover, nav a[aria-current="page"] { color: var(--text); }

main { padding: 72px 0 96px; }

.eyebrow {
  margin: 0 0 12px;
  color: var(--accent);
  font-size: .8rem;
  font-weight: 800;
  letter-spacing: .14em;
  text-transform: uppercase;
}

h1 {
  max-width: 760px;
  margin: 0;
  font-size: clamp(2.5rem, 7vw, 5.4rem);
  line-height: .98;
  letter-spacing: -.06em;
}

.lead {
  max-width: 680px;
  margin: 26px 0 0;
  color: var(--muted);
  font-size: 1.15rem;
}

.grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 14px;
  margin-top: 54px;
}

.card {
  display: flex;
  min-height: 190px;
  flex-direction: column;
  justify-content: space-between;
  padding: 24px;
  border: 1px solid var(--line);
  border-radius: 22px;
  background: rgba(17, 17, 17, .86);
  text-decoration: none;
  transition: transform .18s ease, border-color .18s ease;
}

.card:hover { transform: translateY(-3px); border-color: var(--accent); }
.card span { color: var(--accent); font-size: 1.4rem; }
.card p { margin: 8px 0 0; color: var(--muted); }
.card h2 { margin: 0; font-size: 1.25rem; }

.document { max-width: 760px; }
.document h1 { font-size: clamp(2.4rem, 7vw, 4.5rem); }
.document h2 { margin: 42px 0 10px; font-size: 1.3rem; }
.document p, .document li { color: #c9c4bb; }
.document li + li { margin-top: 8px; }
.updated { margin: 18px 0 38px; color: var(--muted); }
.notice { padding: 18px 20px; border-left: 3px solid var(--accent); background: var(--panel); }

.contact {
  display: inline-flex;
  margin-top: 12px;
  padding: 13px 18px;
  border-radius: 14px;
  background: var(--accent);
  color: #080808;
  font-weight: 800;
  text-decoration: none;
}

footer {
  display: flex;
  justify-content: space-between;
  gap: 20px;
  padding: 28px 0 44px;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: .85rem;
}

@media (max-width: 720px) {
  header { align-items: flex-start; flex-direction: column; padding: 18px 0; gap: 18px; }
  nav { width: 100%; gap: 14px; overflow-x: auto; }
  main { padding-top: 52px; }
  .grid { grid-template-columns: 1fr; }
  footer { flex-direction: column; }
}