border: none;
            backdrop-filter: blur(10px);
            background: rgba(255, 255, 255, 0.9);
        }
        
        .card-header {
            background: var(--vietmap-primary);
            color: white;
            border-radius: 15px 15px 0 0 !important;
            padding: 20px;
            border: none;
        }
        
        .form-select {
            border-radius: 10px;
            border: 2px solid #e9ecef;
            padding: 12px 15px;
            font-size: 16px;
          