:root{color-scheme:light dark;font:16px/1.5 system-ui,sans-serif}body{margin:0}#app{max-width:32rem;margin:3rem auto;padding:0 1rem}h1{font-size:1.4rem;margin:0 0 1.5rem}h2{font-size:1.1rem}.muted{opacity:.7}.row{display:flex;gap:.5rem;margin:1rem 0}input{font:inherit;padding:.5rem;width:8rem;letter-spacing:.2em}button{font:inherit;padding:.5rem 1rem;cursor:pointer;margin-top:.5rem}button.primary{font-weight:600}code{word-break:break-all}