:root { color-scheme: light dark; --fg: #1f2328; --bg: #ffffff; --muted: #59636e; --accent: #0969da; --warn: #bc4c00; --line: #d1d9e0; }
@media (prefers-color-scheme: dark) { :root { --fg: #e6edf3; --bg: #0d1117; --muted: #9198a1; --accent: #4493f8; --warn: #f0883e; --line: #3d444d; } }
* { box-sizing: border-box; }
body { margin: 0; background: var(--bg); color: var(--fg); font-family: system-ui, sans-serif; line-height: 1.6; }
main { max-width: 24rem; margin: 3rem auto; padding: 0 16px; }
h1 { font-size: 1.5rem; }
label { display: block; margin: 1rem 0; color: var(--muted); }
input { display: block; width: 100%; margin-top: .25rem; padding: .6rem; font-size: 1rem; color: var(--fg); background: var(--bg); border: 1px solid var(--line); border-radius: 6px; }
button { padding: .6rem 1.2rem; font-size: 1rem; color: #fff; background: var(--accent); border: 0; border-radius: 6px; cursor: pointer; }
.message { color: var(--warn); }