:root {
  --ink: #17233c;
  --muted: #5e6d86;
  --paper: #fbfaf6;
  --line: rgba(24, 52, 88, 0.12);
  --blue: #2f68ff;
}
* { box-sizing: border-box; }
body {
  margin: 0;
  color: var(--ink);
  background: radial-gradient(circle at 8% 0%, rgba(47, 104, 255, 0.1), transparent 35%), var(--paper);
  font-family: ui-sans-serif, system-ui, -apple-system, "Segoe UI", sans-serif;
  line-height: 1.6;
  font-size: 1rem;
}
a { color: var(--blue); }
.shell { width: min(760px, calc(100% - 40px)); margin: 0 auto; padding: 28px 0 64px; }
header {
  display: flex; flex-wrap: wrap; gap: 12px 24px; align-items: baseline;
  justify-content: space-between; padding: 18px 0; border-bottom: 1px solid var(--line);
  margin-bottom: 28px;
}
.brand { font-weight: 800; letter-spacing: -0.03em; font-size: 1.15rem; color: inherit; text-decoration: none; }
nav a { margin-left: 14px; font-size: 0.9rem; color: var(--muted); text-decoration: none; }
nav a:hover { color: var(--ink); }
h1 { font-size: 1.75rem; letter-spacing: -0.03em; margin: 0 0 8px; }
.meta { color: var(--muted); font-size: 0.9rem; margin: 0 0 28px; }
h2 { font-size: 1.12rem; margin: 1.6rem 0 0.5rem; }
p, li { color: #243556; }
ul { padding-left: 1.2rem; }
table { width: 100%; border-collapse: collapse; font-size: 0.92rem; margin: 1rem 0; }
th, td { border: 1px solid var(--line); padding: 8px 10px; text-align: left; vertical-align: top; }
th { background: rgba(47, 104, 255, 0.06); }
.note {
  background: rgba(47, 104, 255, 0.06); border: 1px solid var(--line);
  border-radius: 12px; padding: 12px 14px; font-size: 0.92rem; color: var(--muted);
}
footer {
  margin-top: 40px; padding-top: 18px; border-top: 1px solid var(--line);
  font-size: 0.88rem; color: var(--muted);
}
footer a { color: var(--muted); margin-right: 12px; }