:root { color-scheme: light dark; --fg: #1a1a1a; --bg: #fafafa; --accent: #2a5db0; --border: #ccc; }
@media (prefers-color-scheme: dark) { :root { --fg: #eee; --bg: #121212; --border: #444; } }
* { box-sizing: border-box; }
body { margin: 0; font-family: system-ui, sans-serif; color: var(--fg); background: var(--bg); display: flex; min-height: 100vh; align-items: center; justify-content: center; padding: 16px; }
main { max-width: 420px; width: 100%; }
h1 { font-size: 1.4rem; margin-bottom: 0.25rem; }
p { line-height: 1.4; }
form { display: flex; flex-direction: column; gap: 0.75rem; margin-top: 1rem; }
label { font-size: 0.9rem; }
input { font-size: 1.1rem; padding: 0.6rem; border: 1px solid var(--border); border-radius: 6px; background: transparent; color: inherit; }
button { font-size: 1rem; padding: 0.6rem; border: none; border-radius: 6px; background: var(--accent); color: white; cursor: pointer; }
button:disabled { opacity: 0.6; cursor: default; }
#status { min-height: 1.5em; }
#fingerprint .value { font-family: ui-monospace, monospace; }