:root{color-scheme:dark}*{box-sizing:border-box}body{margin:0;background:#000;color:#fff;font-family:Inter,system-ui,sans-serif}input{background:#111;color:#fff;border:1px solid #333}input::placeholder{color:#9aa0a6}button{border:1px solid #0284c7;background:#0ea5e9;color:#fff;cursor:pointer}button:hover{filter:brightness(1.1)}button:focus{outline:2px solid #38bdf8;outline-offset:2px}