body {
            background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
            min-height: 100vh;
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
        }
        
        .register-container {
            min-height: 100vh;
            display: flex;
            align-items: center;
            justify-content: center;
            padding: 20px;
        }
        
        .register-card {
            background: white;
            border-radius: 15px;
            box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
            overflow: hidden;
            width: 100%;
            max-width: 500px;
            animation: fadeIn 0.5s ease;
        }
        
        @keyframes fadeIn {
            from {
                opacity: 0;
                transform: translateY(-20px);
            }
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }
        
        .register-header {
            background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
            color: white;
            padding: 30px;
            text-align: center;
        }
        
        .register-header h2 {
            font-weight: 600;
            margin-bottom: 10px;
        }
        
        .register-body {
            padding: 30px;
        }
        
        .form-label {
            font-weight: 500;
            color: #374151;
            margin-bottom: 8px;
        }
        
        .form-control {
            padding: 12px 15px;
            border: 2px solid #e5e7eb;
            border-radius: 8px;
            font-size: 15px;
            transition: all 0.3s;
        }
        
        .form-control:focus {
            border-color: #667eea;
            box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
        }
        
        .input-group-text {
            background-color: #f9fafb;
            border: 2px solid #e5e7eb;
            border-right: none;
        }
        
        .input-group .form-control {
            border-left: none;
        }
        
        .input-group .form-control:focus {
            border-left: 2px solid #667eea;
        }
        
        .btn-register {
            background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
            color: white;
            border: none;
            padding: 12px;
            font-weight: 600;
            font-size: 16px;
            border-radius: 8px;
            width: 100%;
            transition: all 0.3s;
            margin-top: 10px;
        }
        
        .btn-register:hover {
            transform: translateY(-2px);
            box-shadow: 0 10px 25px rgba(102, 126, 234, 0.4);
        }
        
        .btn-register:active {
            transform: translateY(0);
        }
        
        .password-toggle {
            position: absolute;
            right: 15px;
            top: 50%;
            transform: translateY(-50%);
            background: none;
            border: none;
            color: #9ca3af;
            cursor: pointer;
            z-index: 10;
        }
        
        .password-toggle:hover {
            color: #667eea;
        }
        
        .password-strength {
            margin-top: 8px;
        }
        
        .strength-text {
            font-size: 14px;
            color: #6b7280;
            margin-bottom: 5px;
        }
        
        .strength-bar {
            height: 5px;
            background: #e5e7eb;
            border-radius: 5px;
            overflow: hidden;
        }
        
        .strength-fill {
            height: 100%;
            width: 0%;
            transition: width 0.3s ease;
        }
        
        .strength-0 .strength-fill { width: 20%; background: #ef4444; }
        .strength-1 .strength-fill { width: 40%; background: #f59e0b; }
        .strength-2 .strength-fill { width: 60%; background: #f59e0b; }
        .strength-3 .strength-fill { width: 80%; background: #10b981; }
        .strength-4 .strength-fill { width: 100%; background: #10b981; }
        
        .validation-text {
            font-size: 14px;
            margin-top: 5px;
        }
        
        .login-link {
            text-align: center;
            margin-top: 20px;
            color: #6b7280;
            font-size: 14px;
        }
        
        .login-link a {
            color: #667eea;
            text-decoration: none;
            font-weight: 500;
        }
        
        .login-link a:hover {
            text-decoration: underline;
        }
        
        .error-message {
            color: #ef4444;
            font-size: 14px;
            margin-top: 5px;
        }
        
        .alert-container {
            margin-bottom: 20px;
        }
        
        @media (max-width: 576px) {
            .register-body {
                padding: 25px 20px;
            }
            
            .register-header {
                padding: 25px 20px;
            }
        }