:root { color-scheme: light dark; --bg: #ffffff; --ink: #111827; --muted: #4b5563; --link: #0b5d59; --rule: #d1d5db; }
@media (prefers-color-scheme: dark) { :root { --bg: #0b1020; --ink: #e5e7eb; --muted: #9ca3af; --link: #5eead4; --rule: #374151; } }
* { box-sizing: border-box; }
html { font-family: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif; line-height: 1.6; }
body { margin: 0; background: var(--bg); color: var(--ink); }
main { max-width: 40rem; margin: 0 auto; padding: 4rem 1.25rem 3rem; }
h1 { font-size: 2.25rem; line-height: 1.2; margin: 0 0 1rem; letter-spacing: -0.01em; }
h2 { font-size: 1.05rem; margin: 2.25rem 0 0.5rem; padding-top: 1.25rem; border-top: 1px solid var(--rule); }
p, ul { margin: 0 0 1rem; }
ul { padding-left: 1.25rem; }
a { color: var(--link); text-underline-offset: 0.15em; }
a:focus-visible { outline: 3px solid var(--link); outline-offset: 2px; border-radius: 2px; }
.lead { font-size: 1.2rem; }
.lang { margin-top: 2.5rem; color: var(--muted); font-size: 0.95rem; }