:root { --ink: #1d232a; --muted: #5b6672; --line: #e2e6ea; --bg: #ffffff; --accent: #2f6f9f; }
@media (prefers-color-scheme: dark) {
  :root { --ink: #e8ecef; --muted: #a3adb7; --line: #2c333a; --bg: #14181c; --accent: #7fb3da; }
}
* { box-sizing: border-box; }
body { margin: 0; background: var(--bg); color: var(--ink); font: 17px/1.65 system-ui, -apple-system, "Segoe UI", sans-serif; }
header, main, footer { max-width: 760px; margin: 0 auto; padding: 0 20px; }
header { padding-top: 24px; padding-bottom: 12px; border-bottom: 1px solid var(--line); }
header a.brand { font-weight: 700; color: var(--ink); text-decoration: none; }
nav a { margin-right: 16px; color: var(--muted); font-size: 15px; }
main { padding-top: 24px; padding-bottom: 48px; }
h1 { font-size: 30px; line-height: 1.25; margin: 0 0 8px; }
h2 { font-size: 22px; margin-top: 32px; }
h3 { font-size: 18px; margin-top: 24px; }
a { color: var(--accent); }
.meta { color: var(--muted); font-size: 14px; margin-bottom: 24px; }
.answer { border-left: 3px solid var(--accent); padding: 4px 0 4px 16px; margin: 16px 0 24px; }
table { border-collapse: collapse; width: 100%; margin: 16px 0; font-size: 15px; }
th, td { border-bottom: 1px solid var(--line); padding: 8px 10px; text-align: left; vertical-align: top; }
code, pre { font: 14px/1.5 ui-monospace, Menlo, monospace; }
pre { background: rgba(127,127,127,.1); padding: 12px; overflow-x: auto; }
footer { border-top: 1px solid var(--line); padding-top: 16px; padding-bottom: 32px; color: var(--muted); font-size: 14px; }