:root {
  --bg: #12081f;
  --card: #1c1230;
  --line: #4c3a6e;
  --text: #f5f3ff;
  --muted: #d6d0e8;
  --brand: #c4b5fd;
  --btn: #7c3aed;
}
* { box-sizing: border-box; }
html, body { margin: 0; min-height: 100%; }
body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background: radial-gradient(1200px 600px at 50% -10%, #2a1650 0%, var(--bg) 55%);
  color: var(--text);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
}
.card {
  max-width: 420px;
  width: 100%;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 18px;
  padding: 28px 24px 24px;
  text-align: center;
}
.logo {
  width: 64px;
  height: 64px;
  border-radius: 16px;
  object-fit: cover;
  margin: 0 auto 14px;
  display: block;
  background: #2a1848;
}
.brand {
  font-size: 13px;
  letter-spacing: 1.4px;
  font-weight: 700;
  color: var(--brand);
  text-transform: uppercase;
  margin: 0 0 16px;
}
h1 { font-size: 22px; margin: 0 0 12px; line-height: 1.3; }
p { line-height: 1.45; color: var(--muted); margin: 8px 0; }
.meta { font-size: 15px; color: var(--text); }
.code {
  font-size: 28px;
  letter-spacing: 3px;
  font-weight: 700;
  color: var(--brand);
  margin: 20px 0 8px;
}
.hint, .note { font-size: 13px; opacity: .88; }
.btn {
  display: inline-block;
  margin-top: 12px;
  padding: 13px 22px;
  border-radius: 10px;
  background: var(--btn);
  color: #fff;
  text-decoration: none;
  font-weight: 600;
}
.btn[aria-disabled="true"] { opacity: .55; pointer-events: none; }
@media (max-width: 380px) {
  h1 { font-size: 20px; }
  .code { font-size: 24px; }
}