* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

body {
  background: #0f172a;
  color: #f8fafc;
}

.hero {
  min-height: 100vh;
  display: flex;
  justify-content: center;
  align-items: center;
  background: radial-gradient(circle at center, #1e293b 0%, #0f172a 100%);
  padding: 20px;
}

.card {
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.1);
  padding: 3rem;
  border-radius: 16px;
  text-align: center;
  max-width: 480px;
  width: 100%;
  backdrop-filter: blur(10px);
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.4);
}

.badge {
  display: inline-block;
  background: rgba(56, 189, 248, 0.15);
  color: #38bdf8;
  padding: 6px 16px;
  border-radius: 20px;
  font-size: 0.85rem;
  font-weight: 600;
  margin-bottom: 1rem;
}

h1 {
  font-size: 2.5rem;
  margin-bottom: 0.75rem;
}

.highlight {
  color: #38bdf8;
}

p {
  color: #94a3b8;
  line-height: 1.6;
  margin-bottom: 2rem;
}

button {
  background: #38bdf8;
  color: #0f172a;
  border: none;
  padding: 12px 28px;
  font-size: 1rem;
  font-weight: 700;
  border-radius: 8px;
  cursor: pointer;
  transition: all 0.2s ease;
}

button:hover {
  background: #0ea5e9;
  transform: translateY(-2px);
  box-shadow: 0 10px 20px rgba(56, 189, 248, 0.3);
}

#message {
  margin-top: 1.5rem;
  margin-bottom: 0;
  font-weight: 600;
  color: #4ade80;
  transition: opacity 0.3s ease;
}

.hidden {
  opacity: 0;
}