.messages {
            margin-top: 1.5rem;
            list-style: none;
        }

        .messages div {
            padding: 1rem;
            border-radius: 8px;
            background: rgba(248, 113, 113, 0.1);
            border-left: 4px solid #f87171;
            color: #dc2626 !important;
            font-weight: 500;
            animation: slideIn 0.3s ease-out;
        }



        .submit-button {
            background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
            color: white;
            border: none;
            padding: 1rem 2rem;
            font-size: 1.1rem;
            font-weight: 600;
            border-radius: 12px;
            cursor: pointer;
            transition: all 0.3s ease;
            text-transform: uppercase;
            letter-spacing: 1px;
            box-shadow: 0 4px 15px rgba(102, 126, 234, 0.4);
        }

        .submit-button:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 25px rgba(102, 126, 234, 0.6);
        }

        .submit-button:active {
            transform: translateY(0);
        }



        @media (max-width: 768px) {
            .registration-container {
                grid-template-columns: 1fr;
            }
            
            .registration-form,
            .attendees-section {
                padding: 2rem;
            }
            
            .form-title {
                font-size: 2rem;
            }
        }

  

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

           .popup-messages {
            position: fixed;
            top: 20px;
            right: 20px;
            z-index: 9999;
            max-width: 400px;
            width: 100%;
        }

        .popup-message {
            background: #fff;
            border-radius: 12px;
            padding: 1rem 1.25rem;
            margin-bottom: 1rem;
            box-shadow: 0 8px 25px rgba(0, 0, 0, 0.15);
            border-left: 4px solid #e53e3e;
            display: flex;
            align-items: center;
            gap: 0.75rem;
            transform: translateX(420px);
            opacity: 0;
            animation: slideInRight 0.4s ease-out forwards, fadeOut 0.4s ease-out 4.6s forwards;
            position: relative;
            overflow: hidden;
        }

        .popup-message::before {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            height: 3px;
            background: #e53e3e;
            animation: shrinkProgress 5s linear forwards;
        }

        .popup-message.success {
            border-left-color: #38a169;
        }

        .popup-message.success::before {
            background: #38a169;
        }

        .popup-message.warning {
            border-left-color: #d69e2e;
        }

        .popup-message.warning::before {
            background: #d69e2e;
        }

        .popup-message.info {
            border-left-color: #3182ce;
        }

        .popup-message.info::before {
            background: #3182ce;
        }

        .popup-message-icon {
            font-size: 1.25rem;
            color: #e53e3e;
            flex-shrink: 0;
        }

        .popup-message.success .popup-message-icon {
            color: #38a169;
        }

        .popup-message.warning .popup-message-icon {
            color: #d69e2e;
        }

        .popup-message.info .popup-message-icon {
            color: #3182ce;
        }

        .popup-message-content {
            flex: 1;
            font-size: 0.95rem;
            color: #2d3748;
            font-weight: 500;
        }

        .popup-message-close {
            background: none;
            border: none;
            font-size: 1.1rem;
            color: #718096;
            cursor: pointer;
            padding: 0;
            width: 24px;
            height: 24px;
            display: flex;
            align-items: center;
            justify-content: center;
            border-radius: 50%;
            transition: all 0.2s ease;
            flex-shrink: 0;
        }

        .popup-message-close:hover {
            background: #f7fafc;
            color: #4a5568;
        }

        @keyframes slideInRight {
            from {
                transform: translateX(420px);
                opacity: 0;
            }
            to {
                transform: translateX(0);
                opacity: 1;
            }
        }

        @keyframes fadeOut {
            from {
                opacity: 1;
                transform: translateX(0);
            }
            to {
                opacity: 0;
                transform: translateX(420px);
            }
        }

        @keyframes shrinkProgress {
            from {
                width: 100%;
            }
            to {
                width: 0%;
            }
        }

        /* Mobile responsive */
        @media (max-width: 480px) {
            .popup-messages {
                top: 10px;
                right: 10px;
                left: 10px;
                max-width: none;
            }

            .popup-message {
                transform: translateY(-100px);
                animation: slideInDown 0.4s ease-out forwards, fadeOutUp 0.4s ease-out 4.6s forwards;
            }

            @keyframes slideInDown {
                from {
                    transform: translateY(-100px);
                    opacity: 0;
                }
                to {
                    transform: translateY(0);
                    opacity: 1;
                }
            }

            @keyframes fadeOutUp {
                from {
                    opacity: 1;
                    transform: translateY(0);
                }
                to {
                    opacity: 0;
                    transform: translateY(-100px);
                }
            }
        }

        /* Demo page styles */
       

        .demo-container {
            max-width: 800px;
            margin: 0 auto;
            background: rgba(255, 255, 255, 0.95);
            backdrop-filter: blur(20px);
            border-radius: 24px;
            padding: 3rem;
            box-shadow: 0 20px 60px rgba(0, 0, 0, 0.15);
        }

        .demo-title {
            font-size: 2.5rem;
            font-weight: 700;
            color: #2d3748;
            margin-bottom: 1rem;
            text-align: center;
        }

        .demo-subtitle {
            color: #718096;
            text-align: center;
            margin-bottom: 2rem;
        }

        .demo-buttons {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
            gap: 1rem;
            margin-bottom: 2rem;
        }

        .demo-btn {
            background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
            color: white;
            border: none;
            padding: 1rem 1.5rem;
            font-size: 1rem;
            font-weight: 600;
            border-radius: 12px;
            cursor: pointer;
            transition: all 0.3s ease;
            text-transform: uppercase;
            letter-spacing: 0.5px;
        }

        .demo-btn:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 25px rgba(102, 126, 234, 0.6);
        }

        .demo-btn.success {
            background: linear-gradient(135deg, #48bb78 0%, #38a169 100%);
        }

        .demo-btn.warning {
            background: linear-gradient(135deg, #ed8936 0%, #d69e2e 100%);
        }

        .demo-btn.info {
            background: linear-gradient(135deg, #4299e1 0%, #3182ce 100%);
        }

        .code-example {
            background: #2d3748;
            color: #e2e8f0;
            padding: 1.5rem;
            border-radius: 12px;
            font-family: 'Courier New', monospace;
            font-size: 0.9rem;
            line-height: 1.6;
            overflow-x: auto;
        }