*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
:root {
  --bg: #fafafa; --fg: #1a2744; --card: #ffffff; --primary: #1a2744;
  --primary-fg: #fafafa; --secondary: #f3f4f6; --muted: #6b7a90; --border: #e5e7eb;
}
body {
  font-family: 'Inter', system-ui, -apple-system, sans-serif;
  background: var(--bg); color: var(--fg); line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}
a { color: inherit; }
.container { max-width: 760px; margin: 0 auto; padding: 0 24px; }
.header {
  position: sticky; top: 0; z-index: 50;
  background: rgba(250, 250, 250, 0.95); backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--border);
}
.header-inner {
  display: flex; align-items: center; justify-content: space-between;
  padding: 16px 24px; max-width: 1152px; margin: 0 auto;
}
.logo { font-size: 18px; font-weight: 600; letter-spacing: -0.02em; text-decoration: none; }
.logo span { font-weight: 400; color: var(--muted); }
.back { font-size: 14px; color: var(--muted); text-decoration: none; }
.back:hover { color: var(--fg); }
main { padding: 64px 0 96px; }
h1 { font-size: clamp(26px, 3.5vw, 34px); font-weight: 600; letter-spacing: -0.02em; }
.updated { margin-top: 8px; font-size: 13px; color: var(--muted); }
h2 { margin-top: 40px; font-size: 18px; font-weight: 600; letter-spacing: -0.01em; }
p { margin-top: 12px; font-size: 15px; color: var(--muted); }
ul { margin-top: 12px; padding-left: 20px; }
li { font-size: 15px; color: var(--muted); margin-top: 6px; }
strong { color: var(--fg); font-weight: 500; }
.footer { border-top: 1px solid var(--border); padding: 32px 0; }
.footer p { margin: 0; font-size: 12px; color: var(--muted); text-align: center; }