*{box-sizing:border-box}body{color:#222;background-color:#f4f7f6;margin:0;font-family:Arial,sans-serif;line-height:1.6}header{background-color:#134e4a;padding:1rem}header a{color:#fff;font-weight:700;text-decoration:none}main{max-width:900px;margin:0 auto;padding:1rem}section{background-color:#fff;border-radius:8px;margin-top:1rem;padding:1rem}h1,h2{color:#134e4a}button,select,input,textarea{font:inherit}button{color:#fff;cursor:pointer;background-color:#134e4a;border:0;padding:.5rem 1rem}button:hover{background-color:#0f3f3b}a{color:#005fcc}a:focus,button:focus,select:focus,input:focus,textarea:focus{outline-offset:3px;outline:3px solid #ffbf47}.link{color:#000;background-color:#fff;padding:.5rem;position:absolute;top:0;left:-999px}.link:focus{z-index:10;top:1rem;left:1rem}ul{padding-left:1.5rem}