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

body {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  background: #0a0a0f;
  background-image:
    radial-gradient(ellipse at 20% 50%, rgba(99,102,241,0.15) 0%, transparent 60%),
    radial-gradient(ellipse at 80% 20%, rgba(139,92,246,0.12) 0%, transparent 50%),
    radial-gradient(ellipse at 60% 80%, rgba(59,130,246,0.1) 0%, transparent 50%);
  font-family: 'Segoe UI', system-ui, -apple-system, sans-serif;
  color: #e2e8f0;
  padding: 1rem;
}

.container {
  width: 100%;
  max-width: 520px;
  background: rgba(255, 255, 255, 0.04);
  backdrop-filter: blur(12px);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 24px;
  padding: 2rem;
  box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.5);
  transition: all 0.3s ease;
}

.header {
  margin-bottom: 2rem;
  text-align: center;
}

.header h1 {
  font-size: 1.75rem;
  font-weight: 700;
  background: linear-gradient(135deg, #e2e8f0 0%, #818cf8 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}