:root { --bg: #F1F5F6; --surface: #fff; --ink: #0A1F2B; --muted: #5A6F7A; --line: #DCE5E9; --accent: #0B7F86; --mark: #FFF3C4; color-scheme: light; }
@media (prefers-color-scheme: dark) { :root:not([data-theme="light"]) { --bg: #061117; --surface: #0D1C24; --ink: #E6F0F3; --muted: #8BA3AD; --line: #1D3440; --accent: #3FCFC0; --mark: #4A3B00; color-scheme: dark; } }
:root[data-theme="dark"] { --bg: #061117; --surface: #0D1C24; --ink: #E6F0F3; --muted: #8BA3AD; --line: #1D3440; --accent: #3FCFC0; --mark: #4A3B00; color-scheme: dark; }
* { box-sizing: border-box; }
body { margin: 0; background: var(--bg); color: var(--ink); font: 16px/1.65 "Segoe UI", system-ui, -apple-system, Roboto, sans-serif; }
main { max-width: 760px; margin: 0 auto; padding: 24px 16px 64px; }
header { display: flex; justify-content: space-between; align-items: center; gap: 12px; flex-wrap: wrap; margin-bottom: 8px; }
header a { color: var(--accent); font-weight: 700; text-decoration: none; }
nav a { margin-left: 14px; }
article { background: var(--surface); border: 1px solid var(--line); border-radius: 18px; padding: 24px; margin-top: 16px; }
h1 { font-size: 28px; line-height: 1.2; margin: 0 0 4px; letter-spacing: -.02em; }
h2 { font-size: 18px; margin: 24px 0 6px; }
p, li { color: var(--ink); }
.muted { color: var(--muted); font-size: 14px; }
a { color: var(--accent); }
mark { background: var(--mark); color: inherit; padding: 0 3px; border-radius: 4px; }
table { border-collapse: collapse; width: 100%; font-size: 14px; }
td, th { border-bottom: 1px solid var(--line); padding: 6px 8px; text-align: left; vertical-align: top; }