:root {
  --bg: #f4f8fa;
  --surface: #ffffff;
  --ink: #12202c;
  --muted: #4d6170;
  --line: #d5e1e7;
  --accent: #006d80;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #030d16;
    --surface: #0c1b28;
    --ink: #eaf3f7;
    --muted: #9fb3c0;
    --line: #1f3344;
    --accent: #35e4ea;
  }
}
* { box-sizing: border-box; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font: 17px/1.6 -apple-system, BlinkMacSystemFont, "Segoe UI", system-ui, sans-serif;
}
header, main, footer { max-width: 720px; margin: 0 auto; padding: 0 16px; }
header { display: flex; align-items: center; justify-content: space-between; padding-top: 20px; padding-bottom: 8px; }
.brand { font-weight: 800; font-size: 22px; color: var(--ink); text-decoration: none; letter-spacing: -0.02em; }
nav { display: flex; gap: 18px; }
nav a { color: var(--muted); text-decoration: none; font-weight: 600; }
nav a[aria-current="page"] { color: var(--accent); }
a { color: var(--accent); }
h1 { font-size: 34px; line-height: 1.15; margin: 28px 0 8px; letter-spacing: -0.02em; }
h2 { font-size: 22px; margin: 36px 0 8px; }
h3 { font-size: 17px; margin: 22px 0 4px; }
p, li { color: var(--ink); }
.meta { color: var(--muted); margin-top: 0; }
.lead { font-size: 19px; }
.contact { background: var(--surface); border: 1px solid var(--line); border-radius: 16px; padding: 4px 20px 8px; margin: 24px 0; }
.contact h2 { margin-top: 16px; }
ul { padding-left: 22px; }
footer { color: var(--muted); font-size: 14px; border-top: 1px solid var(--line); margin-top: 48px; padding-top: 16px; padding-bottom: 32px; }