:root { --navy: #1E3A8A; --emerald: #047857; --text: #1f2937; --muted: #5b6474; --line: #e2e6ee; --bg: #ffffff; }
@media (prefers-color-scheme: dark) {
  :root { --navy: #9db4f5; --emerald: #34d399; --text: #e5e7eb; --muted: #a3acbb; --line: #2c3444; --bg: #0f1522; }
}
* { box-sizing: border-box; }
body { margin: 0; background: var(--bg); color: var(--text); font: 16px/1.6 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif; }
header, main, footer { max-width: 760px; margin: 0 auto; padding: 0 16px; }
header { padding-top: 20px; }
header a { color: var(--navy); text-decoration: none; font-size: 20px; }
h1 { color: var(--navy); font-size: 28px; line-height: 1.25; margin: 24px 0 4px; }
h2 { color: var(--navy); font-size: 19px; margin: 32px 0 8px; }
.meta { color: var(--muted); font-size: 14px; margin-top: 0; }
a { color: var(--navy); }
table { width: 100%; border-collapse: collapse; font-size: 14px; margin: 8px 0; display: block; overflow-x: auto; }
th, td { border: 1px solid var(--line); padding: 8px; text-align: left; vertical-align: top; }
th { background: color-mix(in srgb, var(--navy) 8%, transparent); }
li { margin: 4px 0; }
.box { border-left: 4px solid var(--emerald); padding: 8px 14px; background: color-mix(in srgb, var(--emerald) 8%, transparent); margin: 16px 0; }
footer { color: var(--muted); font-size: 14px; border-top: 1px solid var(--line); margin-top: 40px; padding-top: 16px; padding-bottom: 32px; }