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

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

.container {
  width: 100%;
  max-width: 600px;
  margin: 0 auto;
}

.product-card {
  background: white;
  border-radius: 20px;
  padding: 40px;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
  text-align: center;
  animation: fadeIn 0.5s ease-in;
}

@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.upsell-card {
  border: 3px solid #fbbf24;
  position: relative;
}

.badge {
  background: #fbbf24;
  color: #1f2937;
  padding: 8px 20px;
  border-radius: 20px;
  font-weight: bold;
  font-size: 14px;
  display: inline-block;
  margin-bottom: 20px;
  animation: pulse 2s infinite;
}

@keyframes pulse {
  0%, 100% {
    transform: scale(1);
  }
  50% {
    transform: scale(1.05);
  }
}

h1 {
  font-size: 32px;
  color: #1f2937;
  margin-bottom: 10px;
}

.subtitle {
  font-size: 18px;
  color: #6b7280;
  margin-bottom: 30px;
}

.features {
  background: #f9fafb;
  border-radius: 12px;
  padding: 20px;
  margin: 30px 0;
  text-align: left;
}

.feature {
  padding: 12px 0;
  font-size: 16px;
  color: #374151;
  border-bottom: 1px solid #e5e7eb;
}

.feature:last-child {
  border-bottom: none;
}

.price {
  margin: 30px 0;
}

.price .amount {
  font-size: 48px;
  font-weight: bold;
  color: #667eea;
}

.price .period {
  font-size: 16px;
  color: #6b7280;
  margin-left: 10px;
}

.price-comparison {
  margin: 30px 0;
}

.old-price {
  font-size: 18px;
  color: #6b7280;
  margin-bottom: 10px;
}

.strikethrough {
  text-decoration: line-through;
  color: #9ca3af;
}

.new-price {
  font-size: 20px;
  color: #1f2937;
  margin-top: 10px;
}

.new-price .amount {
  font-size: 42px;
  font-weight: bold;
  color: #10b981;
  margin-left: 10px;
}

.btn {
  padding: 16px 32px;
  font-size: 18px;
  font-weight: bold;
  border: none;
  border-radius: 12px;
  cursor: pointer;
  transition: all 0.3s ease;
  text-decoration: none;
  display: inline-block;
  width: 100%;
}

.btn-primary {
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  color: white;
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 10px 25px rgba(102, 126, 234, 0.4);
}

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

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

.btn-large {
  padding: 20px 40px;
  font-size: 20px;
}

.guarantee {
  margin-top: 20px;
  font-size: 14px;
  color: #6b7280;
}

.skip-link {
  display: block;
  margin-top: 20px;
  color: #6b7280;
  text-decoration: none;
  font-size: 14px;
}

.skip-link:hover {
  text-decoration: underline;
}

.success-icon {
  font-size: 64px;
  margin-bottom: 20px;
}

.loading {
  margin: 30px 0;
}

.spinner {
  border: 4px solid #f3f4f6;
  border-top: 4px solid #667eea;
  border-radius: 50%;
  width: 40px;
  height: 40px;
  animation: spin 1s linear infinite;
  margin: 20px auto;
}

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

.payment-info {
  background: #ecfdf5;
  border: 2px solid #10b981;
  border-radius: 12px;
  padding: 15px;
  margin: 20px 0;
  color: #065f46;
}

.error-message {
  background: #fef2f2;
  border: 2px solid #ef4444;
  border-radius: 12px;
  padding: 15px;
  margin: 20px 0;
  color: #991b1b;
}

.thank-you-content {
  margin: 30px 0;
}

.thank-you-content p {
  margin: 10px 0;
  font-size: 16px;
  color: #4b5563;
}

.next-steps {
  background: #f9fafb;
  border-radius: 12px;
  padding: 30px;
  margin: 30px 0;
  text-align: left;
}

.next-steps h3 {
  font-size: 20px;
  color: #1f2937;
  margin-bottom: 20px;
  text-align: center;
}

.step {
  display: flex;
  align-items: center;
  padding: 15px 0;
  border-bottom: 1px solid #e5e7eb;
}

.step:last-child {
  border-bottom: none;
}

.step-number {
  background: #667eea;
  color: white;
  width: 30px;
  height: 30px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: bold;
  margin-right: 15px;
  flex-shrink: 0;
}

.step-text {
  font-size: 16px;
  color: #374151;
}

/* Responsive */
@media (max-width: 640px) {
  .product-card {
    padding: 30px 20px;
  }

  h1 {
    font-size: 24px;
  }

  .price .amount {
    font-size: 36px;
  }

  .new-price .amount {
    font-size: 32px;
  }

  .btn {
    font-size: 16px;
    padding: 14px 28px;
  }

  .btn-large {
    font-size: 18px;
    padding: 18px 32px;
  }
}