:root { color-scheme: light dark; --bg: #ffffff; --fg: #14161a; --muted: #4a5160; --accent: #1b43b8; }
@media (prefers-color-scheme: dark) { :root { --bg: #0f1115; --fg: #eef0f4; --muted: #b3b9c6; --accent: #8fb0ff; } }
* { box-sizing: border-box; }
body { margin: 0; min-height: 100vh; display: grid; place-items: center; padding: 2rem; background: var(--bg); color: var(--fg);
  font: 1.125rem/1.6 system-ui, -apple-system, "Segoe UI", sans-serif; }
main { max-width: 38rem; }
h1 { font-size: clamp(2rem, 6vw, 3rem); line-height: 1.15; margin: 0 0 1rem; }
p { margin: 0 0 1rem; color: var(--muted); }
a { color: var(--accent); text-underline-offset: 0.2em; }
a:focus-visible { outline: 3px solid currentColor; outline-offset: 3px; border-radius: 2px; }
nav ul { list-style: none; padding: 0; display: flex; gap: 1.5rem; margin: 1.5rem 0 0; }
footer { margin-top: 2rem; font-size: 0.9rem; }