html,body{width:100%;height:100%;margin:0;padding:0;overflow:hidden}body{font-family:Poppins,sans-serif;background-color:#ccc}.main-content{flex-grow:1;display:flex;justify-content:center;align-items:center;width:100%}h1{font-size:3.2em;line-height:1.1}button{border-radius:8px;border:1px solid transparent;padding:.6em 1.2em;font-size:1em;font-weight:500;font-family:inherit;background-color:#1a1a1a;cursor:pointer;transition:border-color .25s}button:hover{border-color:#646cff}@media (max-width: 768px){body{flex-direction:column;align-items:stretch}h1{font-size:2.4em}button{width:100%}}