:root { color-scheme: light dark; --bg: #f5f4f0; --card: #ffffff; --ink: #1f1e1b; --quiet: #63615a; --line: #d9d6cc; --accent: #2f6fbf; --bad: #a3342b; }
@media (prefers-color-scheme: dark) { :root { --bg: #1b1a18; --card: #26241f; --ink: #ece9e1; --quiet: #a9a59a; --line: #3b3932; --accent: #6ea5e8; --bad: #ec8a80; } }
* { box-sizing: border-box; }
body { margin: 0; min-height: 100vh; display: grid; place-items: center; padding: 16px; background: var(--bg); color: var(--ink); font: 16px/1.45 system-ui, -apple-system, "Segoe UI", sans-serif; }
.card { width: 100%; max-width: 380px; background: var(--card); border: 1px solid var(--line); border-radius: 10px; padding: 28px; }
h1 { margin: 0 0 4px; font-size: 22px; }
.hint { margin: 0 0 20px; color: var(--quiet); font-size: 14px; }
label { display: block; margin: 14px 0 4px; font-size: 14px; font-weight: 600; }
input { width: 100%; padding: 10px 12px; border: 1px solid var(--line); border-radius: 8px; background: transparent; color: inherit; font: inherit; }
input:focus-visible, button:focus-visible { outline: 2px solid var(--accent); outline-offset: 1px; }
button { width: 100%; margin-top: 20px; padding: 11px; border: 0; border-radius: 8px; background: var(--accent); color: #fff; font: inherit; font-weight: 600; cursor: pointer; }
button:disabled { opacity: .6; cursor: progress; }
#message { min-height: 22px; margin: 12px 0 0; color: var(--bad); font-size: 14px; }