body{font-family:system-ui,sans-serif;background:#f3f4f6;color:#172033;margin:0;padding:2rem}main{max-width:36rem;background:white;margin:8vh auto;padding:2rem;border-radius:12px}button{background:#135e96;color:white;border:0;border-radius:5px;padding:.8rem 1.4rem;font:inherit;touch-action:none}button:disabled{opacity:.5}input[type=range]{width:100%}p{line-height:1.6}a{color:#135e96}