:root {
  color-scheme: dark;
  --bg: #0b0b10;
  --surface: #15131d;
  --border: #30283f;
  --text: #f1eff7;
  --muted: #b7b2c4;
  --accent: #a78bfa;
}

* { box-sizing: border-box; }

html { background: var(--bg); }

body {
  margin: 0;
  color: var(--text);
  background:
    radial-gradient(circle at 50% -10%, rgba(139, 92, 246, 0.2), transparent 38rem),
    var(--bg);
  font: 16px/1.65 -apple-system, BlinkMacSystemFont, "SF Pro Text", system-ui, sans-serif;
}

a { color: var(--accent); }

.shell {
  width: min(760px, calc(100% - 36px));
  margin: 0 auto;
}

header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  padding: 24px 0;
}

.brand {
  color: var(--text);
  font-size: 20px;
  font-weight: 850;
  letter-spacing: -0.02em;
  text-decoration: none;
}

nav { display: flex; flex-wrap: wrap; gap: 16px; }
nav a { color: var(--muted); font-size: 14px; text-decoration: none; }
nav a:hover, nav a:focus { color: var(--text); }

main {
  padding: 56px 0 80px;
}

.hero { padding: 34px 0 10px; }
.eyebrow { color: var(--accent); font-size: 12px; font-weight: 800; letter-spacing: 0.13em; }
h1 { max-width: 700px; margin: 8px 0 12px; font-size: clamp(34px, 7vw, 56px); line-height: 1.04; letter-spacing: -0.045em; }
h2 { margin: 34px 0 8px; font-size: 20px; line-height: 1.25; }
h3 { margin: 24px 0 6px; font-size: 16px; }
p, li { color: var(--muted); }
strong { color: var(--text); }
ul { padding-left: 22px; }

.lede { max-width: 660px; font-size: 18px; }
.updated { color: #8e879d; font-size: 13px; }

.cards {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
  margin-top: 32px;
}

.card {
  display: block;
  min-height: 142px;
  padding: 22px;
  color: var(--text);
  background: rgba(21, 19, 29, 0.88);
  border: 1px solid var(--border);
  border-radius: 20px;
  text-decoration: none;
}

.card span { display: block; margin-top: 8px; color: var(--muted); font-size: 14px; }
.notice { margin: 24px 0; padding: 18px; background: var(--surface); border: 1px solid var(--border); border-radius: 16px; }

footer {
  padding: 24px 0 36px;
  color: #8e879d;
  border-top: 1px solid var(--border);
  font-size: 13px;
}

@media (max-width: 620px) {
  header { align-items: flex-start; flex-direction: column; }
  main { padding-top: 28px; }
  .cards { grid-template-columns: 1fr; }
}