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

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  min-height: 100vh;
  display: flex;
  justify-content: center;
  align-items: center;
  padding: 20px;
}

.container {
  background: white;
  border-radius: 16px;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.2);
  max-width: 600px;
  width: 100%;
  overflow: hidden;
}

header {
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  color: white;
  padding: 40px;
  text-align: center;
}

header h1 {
  font-size: 2.5rem;
  margin-bottom: 10px;
}

.subtitle {
  opacity: 0.9;
  font-size: 1.1rem;
}

main {
  padding: 40px;
}

.card {
  background: #f8f9fa;
  border-radius: 12px;
  padding: 30px;
  text-align: center;
}

.card h2 {
  color: #333;
  margin-bottom: 15px;
}

.card p {
  color: #666;
  line-height: 1.6;
}

.status {
  margin-top: 20px;
  padding: 15px;
  border-radius: 8px;
  font-weight: 500;
}

.status.success {
  background: #d4edda;
  color: #155724;
}

.status.error {
  background: #f8d7da;
  color: #721c24;
}

footer {
  background: #f8f9fa;
  padding: 20px;
  text-align: center;
  color: #666;
  font-size: 0.9rem;
}