* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

:root {
  --bg: #0b1220;
  --card: #111a2e;
  --border: #1e2a44;
  --text: #e8edf6;
  --muted: #93a1b8;
  --accent: #4f8cff;
}

body {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: radial-gradient(1200px 600px at 50% -10%, #16233f 0%, var(--bg) 60%);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  padding: 24px;
}

.card {
  max-width: 480px;
  width: 100%;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 48px 40px;
  text-align: center;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.4);
}

.icon {
  width: 64px;
  height: 64px;
  margin: 0 auto 24px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  background: rgba(79, 140, 255, 0.12);
  color: var(--accent);
}

.icon svg {
  width: 32px;
  height: 32px;
}

h1 {
  font-size: 1.75rem;
  font-weight: 700;
  margin-bottom: 12px;
  letter-spacing: -0.02em;
}

.lead {
  color: var(--muted);
  line-height: 1.6;
  margin-bottom: 20px;
}

.sub {
  color: var(--muted);
  font-size: 0.875rem;
}

@media (max-width: 480px) {
  .card {
    padding: 36px 24px;
  }

  h1 {
    font-size: 1.5rem;
  }
}