body{padding:80px 5px;max-width:1200px}body>header,body>footer{position:fixed;left:0;right:0;background:#333;color:#fff;padding:20px;font-size:1.5rem}body>header nav,body>footer nav{max-width:1200px;margin:auto;display:flex}body>header nav a,body>footer nav a{color:inherit;padding:10px}body>header{background-color:#3b3e49;top:0}body>header a[href="/"]{font-weight:bold}body>footer{bottom:0}@media screen and (max-width: 980px){body{padding:10px 5px}body>header,body>footer{font-size:1rem;padding:0;font-size:10px}body>header nav,body>footer nav{padding:0}}main>section a.start{display:block;padding:10px;text-align:right}main>section .separator{height:100px;background-position:20%;background-size:cover}main>section #advantages{display:flex;flex-wrap:wrap;padding:0;justify-content:space-between}main>section #advantages li{box-sizing:border-box;margin-top:10px;display:flex;flex:0 0 calc(50% - 10px);padding:10px;justify-content:center;border:1px solid #ccc;border-radius:5px}form.loading{position:relative}form.loading::after{position:absolute;top:0;bottom:0;left:0;right:0;content:"";display:block;background:rgba(0,0,0,.3)}