:root { --bg: #f1f3f8; --card: #fff; --text: #131a2b; --muted: #586379; --accent: #2f49d1; --line: #dde2ec; }
@media (prefers-color-scheme: dark) { :root { --bg: #0d111a; --card: #161b27; --text: #e8ecf5; --muted: #9aa4b8; --accent: #8296ff; --line: #293043; } }
* { box-sizing: border-box; }
body { margin: 0; background: var(--bg); color: var(--text); font: 16px/1.6 -apple-system, system-ui, "Segoe UI", Roboto, sans-serif; }
main { max-width: 760px; margin: 0 auto; padding: 32px 16px 64px; }
article { background: var(--card); border-radius: 18px; padding: 28px 24px; border: 1px solid var(--line); }
h1 { font-size: 1.8rem; line-height: 1.2; margin: 0 0 4px; }
h2 { font-size: 1.15rem; margin: 28px 0 6px; }
h3 { font-size: 1rem; margin: 18px 0 4px; }
p, li { color: var(--text); }
.muted, small { color: var(--muted); }
a { color: var(--accent); }
ul { padding-left: 1.2em; }
table { border-collapse: collapse; width: 100%; font-size: .94rem; }
td, th { text-align: left; vertical-align: top; padding: 8px 6px; border-bottom: 1px solid var(--line); }
nav { display: flex; gap: 16px; margin: 0 0 16px; font-size: .95rem; }
.todo { background: #ffe9a8; color: #5a4300; border-radius: 4px; padding: 0 4px; }