body{font:16px/1.5 system-ui,sans-serif;max-width:42rem;margin:2rem auto;padding:0 1rem;color:#222}
input,button{font:inherit;padding:.4rem;margin:.2rem 0}label{display:block;margin-top:.6rem}
.err{color:#a00}.ok{color:#060}nav a{margin-right:1rem}table{border-collapse:collapse}td,th{padding:.3rem .6rem;border-bottom:1px solid #ddd}