:root {
  color-scheme: dark;
  --bg: #111827;
  --surface: #1f2937;
  --text: #f3f4f6;
  --muted: #d1d5db;
  --border: #4b5563;
  --input-border: #6b7280;
  --accent: #a7f3d0;
  --accent-text: #10251d;
  --radius: 8px;
  font: 16px system-ui, sans-serif;
}
* { box-sizing: border-box; }
body { margin: 0; min-height: 100svh; display: grid; place-items: center; padding: 24px; background: var(--bg); color: var(--text); }
main { width: min(100%, 440px); padding: 28px; background: var(--surface); border: 1px solid var(--border); border-radius: 18px; }
h1 { font-size: 1.6rem; margin-top: 0; }
h2 { font-size: 1.15rem; }
h3 { font-size: 1rem; }
p { color: var(--muted); line-height: 1.5; overflow-wrap: anywhere; }
label { display: block; margin-top: 16px; }
input, button { display: block; width: 100%; padding: 12px; margin-top: 8px; border-radius: var(--radius); font: inherit; }
input { background: var(--bg); border: 1px solid var(--input-border); color: var(--text); }
button { background: var(--accent); color: var(--accent-text); border: 0; font-weight: 650; cursor: pointer; }
button:focus-visible, input:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; }
button:disabled { opacity: .55; cursor: default; }
input:disabled { opacity: .65; }
form button { margin-top: 20px; }
.separator { text-align: center; font-size: .9rem; margin: 20px 0 4px; }
.notice { padding: 12px; border: 1px solid var(--input-border); border-radius: var(--radius); font-size: .9rem; }
article { border-top: 1px solid var(--border); margin-top: 16px; }
[hidden] { display: none !important; }
@media (max-width: 400px) { body { padding: 16px; } main { padding: 22px; } }