:root {
  color-scheme: light dark;
  --background: #f4f6f8;
  --surface: #ffffff;
  --text: #15181c;
  --muted: #616975;
  --border: #dce1e7;
  --brand: #0080ff;
  --brand-text: #00172d;
  --success: #45a15c;
}
* { box-sizing: border-box; }
body {
  margin: 0;
  min-height: 100vh;
  background: var(--background);
  color: var(--text);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}
.shell {
  width: min(100% - 32px, 680px);
  margin: 0 auto;
  min-height: 100vh;
  display: grid;
  align-content: center;
  gap: 18px;
  padding: 40px 0;
}
.card {
  border: 1px solid var(--border);
  border-radius: 24px;
  background: var(--surface);
  padding: clamp(24px, 6vw, 48px);
  box-shadow: 0 18px 48px rgba(15, 23, 42, 0.09);
}
.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--text);
  text-decoration: none;
  font-weight: 750;
}
.brand-mark {
  display: grid;
  place-items: center;
  width: 34px;
  height: 34px;
  border-radius: 10px;
  background: var(--brand);
  color: var(--brand-text);
  font-weight: 900;
}
h1 {
  margin: 38px 0 12px;
  max-width: 560px;
  font-size: clamp(2rem, 7vw, 3.4rem);
  line-height: 1.02;
  letter-spacing: -0.045em;
}
.lead {
  margin: 0 0 28px;
  color: var(--muted);
  font-size: 1.05rem;
  line-height: 1.65;
}
.notice {
  margin-bottom: 24px;
  border: 1px solid var(--border);
  border-radius: 14px;
  background: var(--background);
  padding: 14px 16px;
  color: var(--muted);
  line-height: 1.5;
}
button, .button-link {
  appearance: none;
  display: inline-flex;
  min-height: 48px;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--brand);
  border-radius: 13px;
  background: var(--brand);
  color: var(--brand-text);
  padding: 12px 20px;
  font: inherit;
  font-weight: 750;
  text-decoration: none;
  cursor: pointer;
}
button:hover, .button-link:hover { filter: brightness(0.96); }
button:focus-visible, .button-link:focus-visible, .brand:focus-visible {
  outline: 3px solid color-mix(in srgb, var(--brand) 55%, transparent);
  outline-offset: 3px;
}
button.secondary {
  border-color: var(--border);
  background: var(--surface);
  color: var(--text);
}
.facts, .profile {
  display: grid;
  gap: 1px;
  margin: 32px 0 0;
  overflow: hidden;
  border: 1px solid var(--border);
  border-radius: 14px;
  background: var(--border);
}
.facts div, .profile div {
  display: grid;
  grid-template-columns: minmax(110px, 0.75fr) minmax(0, 1.5fr);
  gap: 14px;
  background: var(--surface);
  padding: 13px 15px;
}
dt { color: var(--muted); }
dd { margin: 0; overflow-wrap: anywhere; font-weight: 650; }
.profile { margin-bottom: 24px; }
.success {
  display: grid;
  place-items: center;
  width: 46px;
  height: 46px;
  margin-top: 36px;
  border-radius: 50%;
  background: var(--success);
  color: #07150a;
  font-size: 1.4rem;
  font-weight: 900;
}
.privacy, .reference {
  margin: 20px 0 0;
  color: var(--muted);
  font-size: 0.9rem;
  line-height: 1.5;
}
.mono { font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace; }
.footnote { margin: 0; text-align: center; color: var(--muted); font-size: 0.85rem; }
@media (max-width: 520px) {
  .shell { width: min(100% - 20px, 680px); }
  .card { border-radius: 18px; padding: 24px; }
  .facts div, .profile div { grid-template-columns: 1fr; gap: 4px; }
  button, .button-link { width: 100%; }
}
@media (prefers-color-scheme: dark) {
  :root {
    --background: #0d1014;
    --surface: #15191f;
    --text: #f4f7fa;
    --muted: #aeb6c1;
    --border: #303741;
    --brand-text: #00172d;
  }
  .card { box-shadow: 0 18px 48px rgba(0, 0, 0, 0.32); }
}