body {
    font-family: Arial, sans-serif;
        background-color: #f4f4f4;
            margin: 0;
                padding: 20px;
                }
                
                .container {
                    max-width: 800px;
                        margin: auto;
                            background: white;
                                padding: 20px;
                                    border-radius: 8px;
                                    }
                                    
                                    h1, h2 {
                                        color: #333;
                                        }
                                        
                                        .event,
                                        .registration {
                                            border: 1px solid #ddd;
                                                padding: 10px;
                                                    margin-bottom: 10px;
                                                        border-radius: 5px;
                                                        }
                                                        
                                                        .flash {
                                                            padding: 12px 15px;
                                                                border-radius: 5px;
                                                                    margin-bottom: 20px;
                                                                        font-weight: bold;
                                                                        }
                                                                        
                                                                        .flash-success {
                                                                            background-color: #e6f4ea;
                                                                                color: #1e7e34;
                                                                                    border: 1px solid #b7dfc2;
                                                                                    }
                                                                                    
                                                                                    .flash-error {
                                                                                        background-color: #fbe9e7;
                                                                                            color: #b71c1c;
                                                                                                border: 1px solid #f3c2bd;
                                                                                                }
                                                                                                
                                                                                                form {
                                                                                                    margin-top: 20px;
                                                                                                        margin-bottom: 30px;
                                                                                                        }
                                                                                                        
                                                                                                        label {
                                                                                                            display: block;
                                                                                                                margin-top: 10px;
                                                                                                                }
                                                                                                                
                                                                                                                input,
                                                                                                                select {
                                                                                                                    width: 100%;
                                                                                                                        padding: 10px;
                                                                                                                            margin-top: 5px;
                                                                                                                            }
                                                                                                                            
                                                                                                                            button {
                                                                                                                                margin-top: 15px;
                                                                                                                                    padding: 10px 15px;
                                                                                                                                        border: none;
                                                                                                                                            background-color: #333;
                                                                                                                                                color: white;
                                                                                                                                                    cursor: pointer;
                                                                                                                                                    }
                                                                                                                                                    
                                                                                                                                                    button:hover {
                                                                                                                                                        background-color: #555;
                                                                                                                                                        }