:root {
  color-scheme: dark;
  --background: #0d1117;
  --surface: #151b23;
  --text: #f0f4f8;
  --muted: #a9b5c2;
  --accent: #70d7c7;
  --border: #2b3642;
}

* { box-sizing: border-box; }

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

main {
  width: min(760px, calc(100% - 40px));
  margin: 0 auto;
  padding: 72px 0 56px;
}

.eyebrow {
  color: var(--accent);
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

h1 { font-size: clamp(2.3rem, 7vw, 4.6rem); line-height: 1.03; margin: 14px 0 22px; }
h2 { font-size: 1.35rem; margin-top: 36px; }
p, li { color: var(--muted); }
.lead { font-size: 1.14rem; max-width: 650px; }

.card {
  margin: 38px 0;
  padding: 24px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 16px;
}

a { color: var(--accent); }
nav, footer { display: flex; flex-wrap: wrap; gap: 18px; }
nav { margin-top: 34px; }
footer { border-top: 1px solid var(--border); margin-top: 50px; padding-top: 24px; font-size: 0.9rem; }
ul { padding-left: 22px; }