:root {
  color-scheme: dark;
  --bg: #07111f;
  --panel: #101d2f;
  --text: #f5f8ff;
  --muted: #aab6ca;
  --line: rgba(255, 255, 255, 0.12);
  --blue: #46a1ff;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background: radial-gradient(circle at 20% 0%, #15345e 0, var(--bg) 34rem);
  color: var(--text);
  line-height: 1.6;
}

main {
  width: min(840px, calc(100% - 40px));
  margin: 0 auto;
  padding: 56px 0;
}

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

h1 {
  margin: 8px 0 12px;
  font-size: clamp(2.1rem, 6vw, 3.6rem);
  line-height: 1;
  letter-spacing: 0;
}

h2 {
  margin: 34px 0 10px;
  font-size: 1.35rem;
  letter-spacing: 0;
}

h3 {
  margin: 22px 0 6px;
  font-size: 1rem;
  letter-spacing: 0;
}

p, li { color: var(--muted); }

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

section {
  margin-top: 22px;
  padding: 22px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: rgba(16, 29, 47, 0.78);
}

footer {
  margin-top: 44px;
  padding-top: 22px;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 0.92rem;
}