:root {
  color-scheme: dark;
  --bg-1: #08070c;
  --bg-2: #11101a;
  --card: rgba(18, 17, 29, 0.9);
  --text: #ecebff;
  --muted: #b9b6d8;
  --accent-1: #9f73ff;
  --accent-2: #52dcff;
  --border: rgba(126, 111, 255, 0.32);
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: Inter, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  background: radial-gradient(1200px 700px at 20% -10%, #22153b 0%, transparent 55%),
    radial-gradient(900px 600px at 85% 120%, #10293b 0%, transparent 58%),
    linear-gradient(145deg, var(--bg-1), var(--bg-2));
  color: var(--text);
}

.page {
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 1.5rem;
}

.card {
  width: min(640px, 100%);
  padding: clamp(1.4rem, 4vw, 2.4rem);
  border: 1px solid var(--border);
  border-radius: 16px;
  background: var(--card);
  backdrop-filter: blur(3px);
  box-shadow: 0 18px 45px rgba(0, 0, 0, 0.35);
  text-align: center;
}

.eyebrow {
  margin: 0 0 0.9rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  font-size: 0.78rem;
  color: var(--accent-2);
}

h1 {
  margin: 0;
  font-size: clamp(1.45rem, 4.2vw, 2.2rem);
  line-height: 1.25;
}

.subheading {
  margin: 1.2rem 0 0.35rem;
  color: var(--muted);
  font-size: 1rem;
}

.official-domain {
  margin: 0 0 1.45rem;
  font-size: clamp(1.2rem, 4vw, 1.55rem);
  font-weight: 700;
}

.official-domain a {
  color: var(--accent-1);
  text-decoration: none;
}

.official-domain a:hover,
.official-domain a:focus-visible {
  text-decoration: underline;
}

.button {
  display: inline-block;
  padding: 0.76rem 1.2rem;
  border-radius: 10px;
  border: 1px solid rgba(125, 109, 255, 0.55);
  background: linear-gradient(135deg, rgba(144, 107, 255, 0.28), rgba(56, 201, 255, 0.22));
  color: var(--text);
  text-decoration: none;
  font-weight: 600;
  transition: transform 150ms ease, box-shadow 150ms ease, border-color 150ms ease;
}

.button:hover,
.button:focus-visible {
  transform: translateY(-1px);
  border-color: rgba(156, 141, 255, 0.85);
  box-shadow: 0 8px 22px rgba(121, 105, 248, 0.28);
}

.button:focus-visible {
  outline: 2px solid rgba(82, 220, 255, 0.55);
  outline-offset: 2px;
}

.footer-note {
  margin: 1.35rem 0 0;
  color: var(--muted);
  font-size: 0.88rem;
  line-height: 1.45;
}

@media (max-width: 420px) {
  .card {
    border-radius: 14px;
  }

  .button {
    width: 100%;
    max-width: 280px;
  }
}