:root { --bg: #f1f3f4; --card: #fff; --ink: #202124; --muted: #616161; --navy: #1F2A44; --line: #e8eaed; }
* { box-sizing: border-box; }
body { margin: 0; background: var(--bg); color: var(--ink); font: 16px/1.5 Arial, Helvetica, sans-serif; }
.box { max-width: 460px; margin: 48px auto; padding: 24px 20px; background: var(--card); border: 1px solid var(--line); border-radius: 10px; }
h1 { margin: 0 0 8px; font-size: 26px; color: var(--navy); }
.lead { font-weight: 700; margin: 12px 0 10px; }
.hint { color: var(--muted); font-size: 14px; margin: 10px 0; }
.btn { display: block; text-align: center; padding: 12px 14px; border-radius: 8px; border: 2px solid var(--navy); color: var(--navy);
  font-weight: 800; text-decoration: none; }
.btn.primary { background: var(--navy); color: #fff; }
.btn:focus-visible { outline: 3px solid #fdd663; outline-offset: 2px; }
hr { border: 0; border-top: 1px solid var(--line); margin: 20px 0 8px; }
@media (max-width: 500px) { .box { margin: 16px; } }