/* Custom styles that don't conflict with Tailwind */
        .airtel-notice {
            color: #e10000;
            font-weight: bold;
            animation: blink 1s infinite;
            margin-top: 5px;
            font-size: 14px;
        }
        
        @keyframes blink {
            0% { opacity: 1; }
            50% { opacity: 0.5; }
            100% { opacity: 1; }
        }
        
        input:valid {
            border-color: #10B981; /* green-500 */
        }

        input:invalid {
            border-color: #EF4444; /* red-500 */
        }
        
        /* Modal specific styles */
        .modal-input {
            width: 100%;
            padding: 12px 15px;
            border: 1px solid #ddd;
            border-radius: 6px;
            font-size: 16px;
            transition: all 0.3s ease;
        }
        
        .modal-input:focus {
            outline: none;
            border-color: #e10000;
            box-shadow: 0 0 0 3px rgba(225, 0, 0, 0.2);
        }
        
        .submit-btn {
            background: #e10000;
            color: white;
            border: none;
            padding: 15px;
            border-radius: 6px;
            font-size: 16px;
            font-weight: 600;
            cursor: pointer;
            width: 100%;
            transition: background 0.3s ease;
        }
        
        .submit-btn:hover {
            background: #c10000;
        }
        
        .help-text {
            font-size: 12px;
            color: #666;
            margin-top: 5px;
        }
        
        .security-note {
            text-align: center;
            margin-top: 20px;
            font-size: 12px;
            color: #666;
        }
        
        /* WhatsApp button styles */
        .whatsapp-share-btn {
            background: #25D366;
            color: white;
            border: none;
            padding: 8px 12px;
            border-radius: 6px;
            font-size: 12px;
            font-weight: 600;
            cursor: pointer;
            transition: background 0.3s ease;
            display: flex;
            align-items: center;
            gap: 4px;
            white-space: nowrap;
        }
        
        .whatsapp-share-btn:hover {
            background: #128C7E;
        }
        
        /* Improved responsive styles */
        @media (max-width: 640px) {
            .tab-button {
                padding: 0.5rem;
                font-size: 0.875rem;
                white-space: nowrap;
            }
            
            .bundle-item {
                flex-direction: column;
                height: auto;
                padding: 1rem;
            }
            
            .bundle-info {
                margin-bottom: 0.5rem;
            }
            
            .bundle-actions {
                display: flex;
                gap: 0.5rem;
                width: 100%;
                justify-content: space-between;
            }
            
            .whatsapp-share-btn {
                flex: 1;
                justify-content: center;
            }
        }