:root {
  --bg: #05080f;
  --card: #0c1320;
  --text: #e6f0ff;
  --muted: #8fa3bf;
  --primary: #2f7df6;
  --primary-strong: #1c4fd6;
  --border: #18243a;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI",
    Roboto, Helvetica, Arial, sans-serif;
  background:
    radial-gradient(circle at top, #0a1530 0%, #05080f 70%);
  color: var(--text);
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
  padding: 20px;
}

.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 18px;
  padding: 56px 42px;
  text-align: center;
  max-width: 560px;
  width: 100%;
  box-shadow:
    0 25px 80px rgba(0, 0, 0, 0.8),
    0 0 0 1px rgba(47, 125, 246, 0.05) inset;
}

.logo {
  max-width: 140px;
  margin-bottom: 28px;
  filter: drop-shadow(0 8px 20px rgba(47, 125, 246, 0.35));
}

h1 {
  margin: 0 0 14px;
  font-size: 2.4rem;
  letter-spacing: 0.5px;
  font-weight: 600;
}

.tag {
  display: inline-block;
  padding: 6px 14px;
  border-radius: 999px;
  background: rgba(47, 125, 246, 0.12);
  color: var(--primary);
  font-size: 0.85rem;
  margin-bottom: 22px;
  border: 1px solid rgba(47, 125, 246, 0.25);
}

p {
  margin: 0 0 18px;
  color: var(--muted);
  line-height: 1.65;
  font-size: 1rem;
}

.highlight {
  color: var(--text);
  font-weight: 500;
}

footer {
  margin-top: 32px;
  font-size: 0.8rem;
  color: var(--muted);
  opacity: 0.75;
}

@media (max-width: 480px) {
  .card {
    padding: 40px 24px;
  }

  h1 {
    font-size: 2rem;
  }
}