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

body {
  display: flex;
  justify-content: center;
  align-items: center;
  height: 100vh;
  margin: 0;
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  overflow: hidden;
}

.card {
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(10px);
  padding: 40px;
  border-radius: 20px;
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
  max-width: 400px;
  width: 100%;
  text-align: center;
  border: 1px solid rgba(255, 255, 255, 0.2);
  animation: fadeInUp 0.6s ease-out;
}

.card h1 {
  font-size: 36px;
  font-weight: 900;
  margin-bottom: 8px;
  background: linear-gradient(135deg, #667eea, #764ba2);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.subtitle {
  color: #666;
  margin-bottom: 30px;
  font-size: 14px;
}

.form-group {
  text-align: left;
  margin-bottom: 20px;
  position: relative;
}

.form-group label {
  display: block;
  font-size: 14px;
  font-weight: 600;
  margin-bottom: 8px;
  color: #333;
}

.form-group input {
  width: 100%;
  padding: 15px;
  border-radius: 12px;
  border: 2px solid #e1e5e9;
  font-size: 14px;
  transition: all 0.3s ease;
  background: #f8f9fa;
}

.form-group input:focus {
  outline: none;
  border-color: #667eea;
  background: #fff;
  box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
}

.form-group input::placeholder {
  color: #999;
}

.btn-continue {
  margin-top: 25px;
  width: 100%;
  padding: 15px;
  border: none;
  border-radius: 12px;
  background: linear-gradient(135deg, #667eea, #764ba2);
  color: white;
  font-weight: bold;
  font-size: 16px;
  cursor: pointer;
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 10px;
  transition: all 0.3s ease;
  box-shadow: 0 4px 15px rgba(102, 126, 234, 0.4);
}

.btn-continue:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 25px rgba(102, 126, 234, 0.6);
}

.btn-continue:active {
  transform: translateY(0);
}

.btn-continue:disabled {
  opacity: 0.6;
  cursor: not-allowed;
  transform: none;
}

.loading {
  display: none;
  width: 20px;
  height: 20px;
  border: 2px solid #ffffff;
  border-top: 2px solid transparent;
  border-radius: 50%;
  animation: spin 1s linear infinite;
}

@keyframes spin {
  0% { transform: rotate(0deg); }
  100% { transform: rotate(360deg); }
}

/* Alert Styles */
.alert {
  position: fixed;
  top: 20px;
  left: 50%;
  transform: translateX(-50%);
  min-width: 300px;
  max-width: 500px;
  padding: 15px 20px;
  border-radius: 12px;
  font-weight: 600;
  text-align: center;
  z-index: 9999;
  opacity: 0;
  transition: all 0.3s ease;
  box-shadow: 0 10px 30px rgba(0,0,0,0.1);
}

.alert.show {
  opacity: 1;
  transform: translateX(-50%) translateY(10px);
}

.alert.success {
  background: linear-gradient(135deg, #48bb78, #38a169);
  color: white;
}

.alert.error {
  background: linear-gradient(135deg, #f56565, #e53e3e);
  color: white;
}

.hidden {
  display: none;
}

/* Animations */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* Responsive */
@media (max-width: 480px) {
  .card {
    margin: 20px;
    padding: 30px 20px;
  }
  
  .card h1 {
    font-size: 28px;
  }
}