:root {
      --primary: #0891b2;
      --primary-dark: #0e7490;
      --secondary: #0f766e;
      --accent: #f59e0b;
      --light: #f8fafc;
      --dark: #1e293b;
      --success: #10b981;
      --danger: #ef4444;
      --warning: #f59e0b;
    }
    
    body {
      font-family: 'Poppins', sans-serif;
      color: var(--dark);
      background: linear-gradient(135deg, #f0f9ff 0%, #e0f2fe 100%);
      min-height: 100vh;
    }
    
    .glass-effect {
      background: rgba(255, 255, 255, 0.8);
      backdrop-filter: blur(10px);
      border: 1px solid rgba(255, 255, 255, 0.3);
    }
    
    .checkout-step {
      position: relative;
      transition: all 0.3s ease;
    }
    
    .checkout-step.active .step-number {
      background: linear-gradient(135deg, var(--primary), var(--primary-dark));
      color: white;
      box-shadow: 0 4px 6px rgba(8, 145, 178, 0.3);
      transform: scale(1.1);
    }
    
    .checkout-step.completed .step-number {
      background: linear-gradient(135deg, var(--success), #059669);
      color: white;
      box-shadow: 0 4px 6px rgba(16, 185, 129, 0.3);
    }
    
    .checkout-step .step-number {
      transition: all 0.3s ease;
    }
    
    @media (min-width: 768px) {
      .checkout-step:not(:last-child):after {
        content: '';
        position: absolute;
        top: 24px;
        left: 60%;
        width: 80%;
        height: 3px;
        background-color: #e5e7eb;
        z-index: -1;
        transition: all 0.3s ease;
      }
      
      .checkout-step.completed:not(:last-child):after {
        background: linear-gradient(90deg, var(--success), #10b981);
      }
    }
    
    .form-input {
      transition: all 0.3s ease;
    }
    
    .form-input:focus {
      transform: translateY(-2px);
      box-shadow: 0 10px 25px rgba(8, 145, 178, 0.15);
    }
    
    .payment-method {
      transition: all 0.3s ease;
      border: 2px solid #e5e7eb;
    }
    
    .payment-method:hover {
      border-color: var(--primary);
      transform: translateY(-2px);
    }
    
    .payment-method.selected {
      border-color: var(--primary);
      background-color: #f0f9ff;
      box-shadow: 0 10px 25px rgba(8, 145, 178, 0.15);
    }
    
    .order-item {
      transition: all 0.3s ease;
    }
    
    .order-item:hover {
      background-color: #f8fafc;
      transform: translateX(5px);
    }
    
    .btn-primary {
      background: linear-gradient(135deg, var(--primary), var(--primary-dark));
      transition: all 0.3s ease;
    }
    
    .btn-primary:hover {
      transform: translateY(-2px);
      box-shadow: 0 10px 25px rgba(8, 145, 178, 0.3);
    }
    
    .btn-secondary {
      background: white;
      border: 2px solid var(--primary);
      color: var(--primary);
      transition: all 0.3s ease;
    }
    
    .btn-secondary:hover {
      background: var(--primary);
      color: white;
      transform: translateY(-2px);
    }
    
    .security-badge {
      animation: pulse 2s infinite;
    }
    
    @keyframes pulse {
      0% { transform: scale(1); }
      50% { transform: scale(1.05); }
      100% { transform: scale(1); }
    }
    
    .slide-in {
      animation: slideIn 0.5s ease;
    }
    
    @keyframes slideIn {
      from { opacity: 0; transform: translateX(-20px); }
      to { opacity: 1; transform: translateX(0); }
    }
    
    .fade-in {
      animation: fadeIn 0.5s ease;
    }
    
    @keyframes fadeIn {
      from { opacity: 0; }
      to { opacity: 1; }
    }
    
    .success-checkmark {
      animation: checkmark 0.5s ease;
    }
    
    @keyframes checkmark {
      0% { transform: scale(0); }
      50% { transform: scale(1.2); }
      100% { transform: scale(1); }
    }
    
    .required-field::after {
      content: " *";
      color: var(--danger);
    }
    
    .form-group {
      margin-bottom: 1.5rem;
    }
    
    .form-label {
      display: block;
      font-weight: 500;
      margin-bottom: 0.5rem;
      color: var(--dark);
    }