:root {
  --ink: #1d2a33;
  --muted: #5d6b74;
  --line: #dde3e8;
  --paper: #f8f9ff;
  --card: #ffffff;
  --accent: #2b5fd9;
  color-scheme: light;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font: 16px/1.6 "Inter Tight", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
}

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

.skip { position: absolute; left: -999px; }
.skip:focus { left: 16px; top: 16px; background: var(--card); padding: 8px 12px; }

header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: 760px;
  margin: 0 auto;
  padding: 24px 20px;
}

.brand { display: flex; align-items: center; gap: 10px; color: var(--ink); font-weight: 700; letter-spacing: .08em; text-decoration: none; }

main {
  max-width: 760px;
  margin: 0 auto 64px;
  padding: 32px 28px;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 20px;
}

h1 { font-size: 2rem; line-height: 1.2; margin: 0 0 8px; }
h2 { font-size: 1.2rem; margin: 36px 0 8px; }
h3 { font-size: 1rem; margin: 20px 0 4px; }
p, li { margin: 0 0 10px; }
ul { padding-left: 22px; }

.updated { color: var(--muted); margin-bottom: 28px; }

table { width: 100%; border-collapse: collapse; margin: 8px 0 16px; font-size: .95rem; }
th, td { text-align: left; vertical-align: top; padding: 8px 10px; border-bottom: 1px solid var(--line); }
th { color: var(--muted); font-weight: 600; }

footer {
  max-width: 760px;
  margin: 0 auto 40px;
  padding: 0 20px;
  color: var(--muted);
  font-size: .9rem;
}

footer nav { display: flex; gap: 16px; flex-wrap: wrap; }

@media (max-width: 600px) {
  main { border-radius: 0; border-left: 0; border-right: 0; padding: 24px 18px; }
  table, thead, tbody, tr, th, td { display: block; }
  thead { display: none; }
  td { border-bottom: 0; padding: 2px 0; }
  tr { border-bottom: 1px solid var(--line); padding: 8px 0; }
}