:root {
  color-scheme: dark;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background: #071019;
  color: #ecf5ff;
}
* { box-sizing: border-box; }
body { margin: 0; min-height: 100vh; background: radial-gradient(circle at 20% 0%, #102437 0, #071019 45%); }
.hero, main { width: min(1120px, calc(100% - 32px)); margin: 0 auto; }
.hero { padding: 72px 0 28px; }
.eyebrow, .section-label { text-transform: uppercase; letter-spacing: .12em; font-size: 12px; color: #7fd7ff; font-weight: 700; }
h1 { font-size: clamp(42px, 8vw, 84px); line-height: .95; margin: 12px 0 20px; max-width: 900px; }
h2 { margin: 8px 0 16px; }
p { color: #b7c8d8; line-height: 1.6; }
.status-strip, .tool-list, .timeline { display: flex; flex-wrap: wrap; gap: 10px; }
.status-strip span, code { border: 1px solid #294458; background: #0b1824; border-radius: 999px; padding: 7px 11px; font-size: 12px; }
.grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 16px; margin: 16px 0; }
.card { background: rgba(11, 24, 36, .88); border: 1px solid #1f3a4d; border-radius: 18px; padding: 22px; box-shadow: 0 18px 80px rgba(0,0,0,.18); }
.judge-prompt { border-color: #38728f; }
dl { display: grid; grid-template-columns: 1fr 1.4fr; gap: 8px 14px; }
dt { color: #7590a4; }
dd { margin: 0; font-family: ui-monospace, SFMono-Regular, Menlo, monospace; font-size: 13px; overflow-wrap: anywhere; }
button { border: 0; border-radius: 12px; padding: 13px 16px; font-weight: 800; cursor: pointer; background: #d5f4ff; color: #061019; }
button.secondary { background: #102333; color: #d7e9f7; border: 1px solid #294458; }
.ok { color: #77efb0 !important; }
.warn { color: #ffd479 !important; }
.bad { color: #ff9595 !important; }
.fingerprint { overflow-wrap: anywhere; font-family: ui-monospace, SFMono-Regular, Menlo, monospace; font-size: 11px; }
.timeline span { padding: 7px 10px; border: 1px solid #294458; border-radius: 8px; color: #7892a5; }
.timeline span.done { color: #77efb0; border-color: #2d7a58; }
pre { overflow: auto; background: #050b11; border-radius: 12px; padding: 14px; color: #9fc2db; font-size: 11px; }
footer { display: flex; justify-content: space-between; align-items: center; gap: 16px; padding: 24px 0 60px; }
footer p { font-size: 12px; }
@media (max-width: 760px) {
  .hero { padding-top: 44px; }
  .grid { grid-template-columns: 1fr; }
  footer { align-items: flex-start; flex-direction: column; }
}