:root { --bg: #EEF2F8; --card: #fff; --text: #111318; --muted: #6B7280; --pri: #3F7FE6; color-scheme: light; }
:root[data-theme="dark"] { --bg: #0D0E10; --card: #1C1D20; --text: #F4F5F7; --muted: #9DA1A9; color-scheme: dark; }
@media (prefers-color-scheme: dark) { :root:not([data-theme="light"]) { --bg: #0D0E10; --card: #1C1D20; --text: #F4F5F7; --muted: #9DA1A9; } }
body { margin: 0; background: var(--bg); color: var(--text); font: 15px/1.65 "Plus Jakarta Sans", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif; }
main { max-width: 720px; margin: 0 auto; padding: 20px 18px 48px; }
h1 { font-size: 26px; margin: 0 0 4px; letter-spacing: -.02em; }
h2 { font-size: 17px; margin: 26px 0 6px; }
p, li { color: var(--text); }
ul { padding-left: 20px; }
.muted { color: var(--muted); font-size: 13px; }
a { color: var(--pri); }
code { font-size: 13px; }