:root {
  color-scheme: light;
  --ink: #172033;
  --muted: #596273;
  --accent: #0b6b62;
  --line: #dfe5e8;
  --surface: #ffffff;
  --page: #f5f7f6;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  color: var(--ink);
  background: var(--page);
  font: 16px/1.65 system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

a { color: var(--accent); text-underline-offset: 3px; }
a:hover { text-decoration-thickness: 2px; }

header, main, footer {
  width: min(100% - 32px, 800px);
  margin-inline: auto;
}

header { padding: 32px 0 20px; }
.brand { color: var(--ink); font-size: 1.15rem; font-weight: 750; text-decoration: none; }
.brand span { color: var(--accent); }

nav { display: flex; flex-wrap: wrap; gap: 8px 20px; margin-top: 18px; }
nav a[aria-current="page"] { color: var(--ink); font-weight: 700; }

main {
  padding: clamp(28px, 6vw, 56px);
  border: 1px solid var(--line);
  border-radius: 18px;
  background: var(--surface);
  box-shadow: 0 14px 40px rgb(23 32 51 / 7%);
}

h1, h2 { line-height: 1.2; letter-spacing: -0.025em; }
h1 { margin: 0 0 8px; font-size: clamp(2rem, 6vw, 3rem); }
h2 { margin: 38px 0 10px; font-size: 1.3rem; }
p, ul, ol { margin: 10px 0; }
li + li { margin-top: 7px; }
.updated, footer { color: var(--muted); font-size: .9rem; }
.contact { padding: 18px; border-left: 4px solid var(--accent); background: #edf7f5; }

footer { padding: 24px 0 40px; text-align: center; }

@media (max-width: 520px) {
  header, main, footer { width: min(100% - 20px, 800px); }
  header { padding-top: 22px; }
  main { border-radius: 12px; }
  nav { gap: 7px 14px; font-size: .92rem; }
}