:root { --bg: #fafbfd; --fg: #0b0b14; --muted: #64647a; --accent: #3a5ce0; --border: #e2e5ec; --surface: #ffffff; }
@media (prefers-color-scheme: dark) {
  :root { --bg: #080810; --fg: #ececf3; --muted: #9a9ab0; --accent: #7d97ff; --border: #24243a; --surface: #10101c; }
}
* { box-sizing: border-box; }
body { margin: 0; background: var(--bg); color: var(--fg); font: 16px/1.6 "Space Grotesk", system-ui, -apple-system, "Segoe UI", sans-serif; }
main { max-width: 46rem; margin: 0 auto; padding: 2rem 1rem 4rem; }
header { display: flex; align-items: center; gap: .6rem; margin-bottom: 1.5rem; }
header img { width: 2rem; height: 2rem; border-radius: .5rem; }
header a { color: var(--fg); text-decoration: none; font-weight: 600; }
h1 { font-size: 1.6rem; line-height: 1.25; margin: 0 0 .25rem; }
h2 { font-size: 1.1rem; margin: 2rem 0 .5rem; }
p, li { color: var(--fg); }
.muted { color: var(--muted); font-size: .9rem; }
a { color: var(--accent); }
ul { padding-left: 1.2rem; }
li { margin: .3rem 0; }
.card { background: var(--surface); border: 1px solid var(--border); border-radius: 1rem; padding: 1rem 1.2rem; margin: 1rem 0; }
.todo { background: #fff4d6; color: #6b4a00; border-radius: .4rem; padding: 0 .3rem; }
@media (prefers-color-scheme: dark) { .todo { background: #3d2f05; color: #ffd98a; } }
footer { margin-top: 3rem; color: var(--muted); font-size: .85rem; }
header a.lang { margin-left: auto; color: var(--accent); font-weight: 400; font-size: .9rem; text-decoration: underline; }
.notice { background: var(--surface); border: 1px solid var(--border); border-radius: .6rem; padding: .6rem .8rem; font-size: .9rem; }