*{box-sizing:border-box}body{margin:0;font:16px/1.5 system-ui,sans-serif;background:#f6f6f4;color:#1b1b1b}
main{max-width:560px;margin:8vh auto;padding:0 16px}h1{font-size:22px;margin:0 0 4px}h2{font-size:17px;margin:24px 0 6px}
ol{padding-left:20px}li{margin:4px 0}a.button{display:inline-block;margin-top:6px;padding:10px 16px;border-radius:8px;background:#1b1b1b;color:#fff;text-decoration:none}
@media (prefers-color-scheme:dark){a.button{background:#eee;color:#111}}
label{display:block;margin:14px 0 4px;font-weight:600}textarea,input,select{display:block;width:100%;margin-top:4px;padding:10px;border:1px solid #ccc;border-radius:8px;font:inherit;background:#fff}
textarea{font-family:ui-monospace,monospace}button{margin-top:14px;padding:10px 16px;border:0;border-radius:8px;background:#1b1b1b;color:#fff;font:inherit;cursor:pointer}
.muted{color:#666;font-size:14px}.error{color:#b00020}
@media (prefers-color-scheme:dark){body{background:#151515;color:#eee}textarea,input,select{background:#222;color:#eee;border-color:#444}button{background:#eee;color:#111}.muted{color:#aaa}}