:root{font-family:Inter,system-ui,sans-serif;color:#172033;background:#f4f6fb}
*{box-sizing:border-box}
body{margin:0}
.shell{max-width:1120px;margin:0 auto;padding:32px 20px}
header,.toolbar,.row,.metric{display:flex;align-items:center;justify-content:space-between;gap:14px}
header{margin-bottom:24px}
.eyebrow{font-size:11px;letter-spacing:.14em;color:#4964e8}
h1{margin:4px 0;font-size:30px}
h2{margin-top:0}
.panel,.device{background:#fff;border:1px solid #e1e6f0;border-radius:10px;box-shadow:0 8px 24px #13213b0a}
.panel{padding:22px}
.login{max-width:420px;margin:80px auto}
.hidden{display:none!important}
form{display:flex;gap:10px}
input,select,button{font:inherit;border-radius:8px;border:1px solid #d5dceb;padding:11px 13px}
input,select{min-width:0;flex:1;background:#fff}
button{background:#4561e8;color:#fff;border-color:#4561e8;cursor:pointer}
button.ghost{background:#fff;color:#172033}
button.danger{background:#b42318;border-color:#b42318}
button:disabled,input:disabled,select:disabled{opacity:.5;cursor:not-allowed}
.controls.inline{display:flex;flex-wrap:wrap}
.error{color:#b42318;min-height:1.2em}
.toolbar{margin-bottom:18px}
.device-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:14px}
.device{padding:16px;cursor:pointer}
.device h3{margin:0 0 10px}
.status{font-size:12px}
.online{color:#16803c}
.offline{color:#9b2c2c}
.metric{font-size:13px;color:#64718a;padding:5px 0}
.section{border-top:1px solid #e7ebf3;padding-top:18px;margin-top:18px}
.controls{display:grid;grid-template-columns:repeat(auto-fit,minmax(180px,1fr));gap:10px}
.controls button{width:100%}
pre{background:#101828;color:#d0d5dd;border-radius:8px;padding:12px;max-height:260px;overflow:auto;white-space:pre-wrap}
.wide{grid-column:1/-1}
@media(max-width:600px){
  .shell{padding:18px 12px}
  form{flex-direction:column}
  .toolbar{align-items:flex-start;flex-wrap:wrap}
  .controls.inline{width:100%}
}