body {
            margin: 0;
            font-family: Arial, sans-serif;
            background: #f7f7f7;
        }
        header {
            background: #222;
            padding: 10px 20px;
            display: flex ;
            align-items: center;
            justify-content: space-between;
            color: white;
        }
        header>div{
            max-width:33%;
        }
        header img {
            height: 50px;
        }
        .f{display:flex;
            flex-direction:row;
            flex-wrap:wrap;
        }
        .c{
            text-align:center;
        }
        .side{
            max-width: 400px;
            gap: 10px;
            display: flex;
            align-items: baseline;
            padding: 10px;
            background-color: #eee;
            
        }
        .block{
            max-width: 190px;
    width: 100%;
    border: 1px solid #bebebe;
    padding: 10px 0 15px;
    background: white;
        }
        #side .block{
            width:49%;
        }
        .swiper {
            width: 100%;
            height: 90vh;
            flex:2;
        }
        .swiper-slide {
            text-align: center;
            display: flex;
            flex-direction: column;
            align-items: center;
            justify-content: center;
        }
        .swiper-slide img {
            max-height: 70vh;
            max-width: 90%;
            border-radius: 10px;
            margin-bottom: 10px;
        }
        .download-link {
            text-decoration: none;
            padding: 8px 16px;
            background: #007bff;
            color: #fff;
            border-radius: 5px;
            transition: background 0.3s;
        }
        .download-link:hover {
            background: #0056b3;
        }
        
        .white{color:white;}
        
        
@media only screen and (max-device-width: 720px){
            
             .f{display:flex;
                flex-direction:column;
             }
             .side{
                 max-width:1000px;
             }
            
        }