body   { font-family: system-ui, sans-serif; margin:0 }
header { background:#0265cc; color:#fff; padding:1rem 2rem; display:flex; align-items:center }
header h1{ margin:0 2rem 0 0; font-size:1.4rem }
nav a  { color:#fff; margin-right:1rem; text-decoration:none; font-weight:600;
         padding:.3rem .6rem; border-radius:.3rem }
nav a.active{ background:#fff; color:#0265cc }
main   { padding:2rem }
.panel { padding:1rem 2rem }
button { padding:.6rem 1.2rem; font-size:1rem; cursor:pointer }
#log   { background:#000; color:#0f0; padding:1rem; margin:0; max-height:160px; overflow:auto;
         font-size:.85rem }
form   { max-width:320px; display:grid; gap:.6rem }
input, textarea { padding:.5rem; font-size:1rem }