* { margin: 0; padding: 0; box-sizing: border-box; }
body {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  background: linear-gradient(135deg, #1e3c72 0%, #2a5298 100%);
  color: #fff;
  text-align: center;
  padding: 1.5rem;
}
.card {
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.15);
  border-radius: 18px;
  padding: 3rem 2.5rem;
  max-width: 480px;
  backdrop-filter: blur(8px);
  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.3);
}
.logo { display: block; margin: 0 auto 1.5rem; width: 120px; height: auto; }
h1 { font-size: 2.75rem; letter-spacing: 1px; margin-bottom: 1rem; }
.tag { font-size: 1.25rem; font-weight: 600; margin-bottom: 0.75rem; }
.sub { font-size: 1rem; opacity: 0.75; line-height: 1.5; }