:root {
  color-scheme: dark;
  --bg: #080a0d;
  --surface: #11161b;
  --line: #273139;
  --text: #f4f7f9;
  --muted: #a7b2ba;
  --signal: #62f2af;
  --accent: #5ac8fa;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  line-height: 1.65;
}

.shell {
  width: min(820px, calc(100% - 32px));
  margin: 0 auto;
  padding: 48px 0 72px;
}

header {
  padding-bottom: 28px;
  border-bottom: 1px solid var(--line);
}

.eyebrow {
  margin: 0 0 10px;
  color: var(--signal);
  font-size: 12px;
  font-weight: 800;
  text-transform: uppercase;
}

h1 {
  margin: 0;
  font-size: clamp(34px, 7vw, 58px);
  line-height: 1.05;
}

.updated, p, li { color: var(--muted); }
.updated { margin: 12px 0 0; font-size: 14px; }

main { padding-top: 12px; }

section {
  padding: 22px 0;
  border-bottom: 1px solid var(--line);
}

h2 { margin: 0 0 8px; font-size: 20px; }
p { margin: 0; }
a { color: var(--accent); }

nav {
  display: flex;
  gap: 18px;
  margin-top: 22px;
  flex-wrap: wrap;
}

.button {
  display: inline-flex;
  min-height: 44px;
  align-items: center;
  padding: 0 14px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--surface);
  color: var(--text);
  font-weight: 700;
  text-decoration: none;
}

footer { padding-top: 28px; color: var(--muted); font-size: 14px; }

@media (prefers-color-scheme: light) {
  :root {
    color-scheme: light;
    --bg: #f7f9fa;
    --surface: #ffffff;
    --line: #dbe2e7;
    --text: #101418;
    --muted: #56636c;
    --signal: #087f4d;
    --accent: #006aa6;
  }
}