:root { --paper: #FBF8F1; --ink: #1F3D8A; --text: #1C1C1E; --muted: #55555C; --surface: #FFFFFF; --rule: #E4DED0; }
@media (prefers-color-scheme: dark) {
  :root { --paper: #1C1D20; --ink: #8DA8FF; --text: #F2F2F2; --muted: #ABABB2; --surface: #2E2F33; --rule: #3A3B40; }
}
* { box-sizing: border-box; }
body { margin: 0; background: var(--paper); color: var(--text);
       font: 17px/1.6 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif; }
main { max-width: 720px; margin: 0 auto; padding: 32px 16px 64px; }
header { display: flex; align-items: center; gap: 14px; margin-bottom: 8px; }
header img { width: 56px; height: 56px; border-radius: 13px; }
h1 { font-size: 1.8rem; margin: 0; }
h2 { font-size: 1.2rem; margin-top: 2em; color: var(--ink); }
a { color: var(--ink); }
.muted { color: var(--muted); }
.card { background: var(--surface); border: 1px solid var(--rule); border-radius: 14px; padding: 4px 20px; margin: 16px 0; }
.todo { background: #FFE9A8; color: #3B2F00; padding: 0 4px; border-radius: 4px; }
nav { margin-top: 40px; padding-top: 16px; border-top: 1px solid var(--rule); font-size: 0.95rem; }