*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
  font-size: 16px;
  line-height: 1.6;
  color: #1a1a1a;
  background: #f5f5f5;
}

header {
  background: #1a1a1a;
  padding: 20px 24px;
  display: flex;
  align-items: center;
  gap: 12px;
}

header a { color: #fff; text-decoration: none; font-size: 14px; opacity: 0.7; }
header a:hover { opacity: 1; }
header .sep { color: #fff; opacity: 0.3; }
header h1 { color: #fff; font-size: 18px; font-weight: 600; }
header .accent { color: #FF3333; }

main { max-width: 720px; margin: 32px auto; padding: 0 24px 48px; }

.meta { color: #666; font-size: 14px; margin-bottom: 32px; }

section {
  background: #fff;
  border-radius: 12px;
  padding: 24px;
  margin-bottom: 16px;
  box-shadow: 0 1px 3px rgba(0,0,0,0.08);
}

section h2 { font-size: 17px; font-weight: 600; margin-bottom: 12px; color: #1a1a1a; }
section h3 { font-size: 15px; font-weight: 600; margin: 16px 0 6px; color: #1a1a1a; }
section h3:first-child { margin-top: 0; }
section p { margin-bottom: 12px; color: #333; }
section p:last-child { margin-bottom: 0; }
section ul { padding-left: 20px; color: #333; margin-bottom: 12px; }
section ul:last-child { margin-bottom: 0; }
section ul li { margin-bottom: 6px; }

a { color: #FF3333; }

@media (prefers-color-scheme: dark) {
  body { background: #121212; color: #e8e8e8; }
  header { background: #0a0a0a; }
  section { background: #1e1e1e; box-shadow: 0 1px 3px rgba(0,0,0,0.3); }
  section h2, section h3 { color: #e8e8e8; }
  section p, section ul { color: #ccc; }
  .meta { color: #888; }
}