:root {
  --night: #14213d;
  --band: #0fa3b1;
  --amber: #f4a259;
  --paper: #f7f7f2;
  --ink: #1b1b1e;
  --muted: #6b7280;
  --card: #ffffff;
  --line: #e5e7eb;
}
@media (prefers-color-scheme: dark) {
  :root { --paper: #1b1b1e; --ink: #f3f4f6; --muted: #9ca3af; --card: #23262e; --line: #374151; --night: #e5e7eb; }
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font: 17px/1.6 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}
main, header, footer { max-width: 760px; margin: 0 auto; padding: 0 20px; }
header { display: flex; align-items: center; justify-content: space-between; padding-top: 20px; padding-bottom: 8px; }
header a.brand { font-weight: 800; font-size: 20px; color: var(--night); text-decoration: none; }
header nav a { margin-left: 14px; color: var(--muted); text-decoration: none; font-size: 15px; }
header nav a:hover { color: var(--band); }
h1 { color: var(--night); font-size: 32px; line-height: 1.2; margin: 28px 0 8px; }
h2 { color: var(--night); font-size: 21px; margin: 32px 0 6px; }
h3 { font-size: 17px; margin: 20px 0 4px; }
a { color: var(--band); }
.lead { font-size: 19px; color: var(--muted); margin-top: 0; }
.updated { color: var(--muted); font-size: 14px; }
.card { background: var(--card); border: 1px solid var(--line); border-radius: 14px; padding: 18px 20px; margin: 16px 0; }
.note { border-left: 4px solid var(--amber); }
.band { color: var(--band); font-weight: 800; }
table { width: 100%; border-collapse: collapse; font-size: 15px; }
th, td { text-align: left; vertical-align: top; padding: 8px 6px; border-bottom: 1px solid var(--line); }
ul { padding-left: 22px; }
footer { color: var(--muted); font-size: 14px; padding-top: 32px; padding-bottom: 40px; border-top: 1px solid var(--line); margin-top: 48px; }
footer a { color: var(--muted); margin-right: 12px; }
.badges { display: flex; gap: 12px; flex-wrap: wrap; margin: 20px 0; }
.badges span { background: var(--night); color: var(--paper); border-radius: 10px; padding: 10px 16px; font-weight: 600; font-size: 15px; }
@media (max-width: 520px) { h1 { font-size: 27px; } header nav a { margin-left: 10px; font-size: 14px; } }