:root {
  color-scheme: light;
  --ink: #17202a;
  --muted: #59636e;
  --surface: #ffffff;
  --page: #f4f7fb;
  --accent: #1457d9;
  --line: #dfe5ec;
}

* { box-sizing: border-box; }

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

main {
  width: min(780px, calc(100% - 32px));
  margin: 48px auto;
  padding: clamp(28px, 6vw, 64px);
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 20px;
  box-shadow: 0 18px 55px rgba(35, 55, 80, .08);
}

h1, h2 { line-height: 1.2; }
h1 { margin: 8px 0 20px; font-size: clamp(2rem, 5vw, 3.5rem); }
h2 { margin-top: 36px; font-size: 1.25rem; }
p, li { color: var(--muted); }
.lead { font-size: 1.2rem; }
.eyebrow { color: var(--accent); font-weight: 700; letter-spacing: .08em; text-transform: uppercase; }
.updated { font-size: .95rem; }
.back { display: inline-block; margin-bottom: 12px; }

nav {
  display: flex;
  flex-wrap: wrap;
  gap: 12px 24px;
  margin-top: 40px;
  padding-top: 24px;
  border-top: 1px solid var(--line);
}

a { color: var(--accent); font-weight: 650; }
a:focus-visible { outline: 3px solid #9fc0ff; outline-offset: 3px; }
footer { margin-top: 28px; font-size: .9rem; }

@media (max-width: 560px) {
  main { margin: 16px auto; border-radius: 14px; }
}