* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        body {
            font-family: Arial, sans-serif;
        }
        header, footer {
            background: #333;
            color: white;
            text-align: center;
            padding: 20px;
        }
        main {
            display: flex;
            flex-direction: column;
            align-items: center;
            padding: 20px;
        }
        .row {
            display: flex;
            justify-content: center;
            gap: 20px;
            flex-wrap: wrap;
            width: 100%;
            max-width: 1200px;
        }
        .row img {
            width: 100%;
            max-width: 300px;
            border-radius: 10px;
        }
        .video-container { 
            position: relative;  
            width: 100%;
            padding-bottom: 56.25%; /* 16:9 aspect ratio */  
            overflow: hidden; }  
            
            .video-container iframe {  
            position: absolute;  
            top: 0;  
            left: 0;  
            width: 100%;  
            height: 100%; } 
        @media (max-width: 768px) {
            .row {
                flex-direction: column;
                align-items: center;
                background-color: rgb(157, 239, 239);
            }
        }