html,body{margin:0;padding:0;font:16px/1.4 -apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica,Arial,sans-serif;background:#fff;color:#000}main{max-width:42rem;margin:8vh auto;padding:0 1rem}h1{margin:0 0 .5rem;font-size:2rem;font-weight:700}h2{margin:2.5rem 0 .5rem;font-size:1.25rem}a{color:inherit;text-decoration:underline}ul{padding-left:1.2rem}.switcher{position:fixed;top:40%;right:1rem;display:flex;flex-direction:column;gap:.5rem}.switcher button{writing-mode:vertical-rl;transform:rotate(180deg);padding:.3rem .4rem;border:1px solid #000;background:#fff;color:#000;cursor:pointer;font:600 12px/1 Fira Sans,sans-serif}.switcher button.active{background:#000;color:#fff}