body{font-family:system-ui;margin:0;background:#f6f7f9;color:#1a1d22}
nav{background:#1a1d22;color:#fff;padding:10px 16px}
nav a{color:#7cd1ff;margin-right:12px;text-decoration:none}
main{max-width:880px;margin:24px auto;padding:0 16px}
.err{background:#fee;border-left:3px solid #c33;padding:8px}
.card{background:#fff;border:1px solid #dde;padding:12px;margin:12px 0;border-radius:6px}
table{width:100%;border-collapse:collapse;margin-top:8px}
th,td{padding:6px 10px;border-bottom:1px solid #dde;text-align:left}
form{margin:8px 0}
label{display:block;margin:6px 0}
input,button{font:inherit;padding:6px 10px}
button{background:#1a1d22;color:#fff;border:0;cursor:pointer}