:root{
  --paper:#EDF0F3; --card:#fff; --ink:#18212B; --muted:#5E6B79; --line:#D5DCE3;
  --navy:#0F2A3D; --navy-2:#1B3B52; --safe:#1F8A70; --warn:#C98F00; --stop:#C8323B;
  --head:'Bricolage Grotesque','Segoe UI',sans-serif; --body:'Public Sans','Segoe UI',sans-serif;
}
*{box-sizing:border-box}
[hidden]{display:none!important}
body{margin:0;background:var(--paper);color:var(--ink);font:16px/1.5 var(--body)}
h1,h2,h3{font-family:var(--head);margin:0}
h1{font-size:30px;font-weight:800;letter-spacing:-.01em}
h3{font-size:17px;font-weight:700;margin-bottom:14px}
.muted{color:var(--muted)} .small{font-size:14px} .err{color:var(--stop);min-height:22px;font-size:14px}
.logo{font:800 20px var(--head);letter-spacing:-.01em;display:flex;align-items:center;gap:10px}
.logo img{display:block;border-radius:8px}
button{font:600 15px var(--body);cursor:pointer}
:focus-visible{outline:3px solid #3AA28A;outline-offset:2px}

/* gate */
.gate{min-height:100vh;display:grid;grid-template-columns:1.1fr 1fr}
.gate-brand{background:var(--navy);color:#fff;padding:48px 56px;display:flex;flex-direction:column;justify-content:space-between}
.gate-brand h1{font-size:clamp(34px,4.4vw,52px);line-height:1.05;max-width:14em;margin-top:auto}
.gate-brand p{color:#B7C7D4;max-width:30em;margin:20px 0 40px}
.gate-form{display:flex;align-items:center;justify-content:center;padding:32px}
.signin{max-width:360px;width:100%}
.signin h2{font-size:26px;margin-bottom:8px}
.signin p{color:var(--muted)}
.gbtn{display:flex;align-items:center;justify-content:center;gap:12px;width:100%;margin-top:24px;
  padding:12px 16px;background:#fff;color:#1f1f1f;border:1px solid #747775;border-radius:4px}
.gbtn:hover{background:#f6f8fa}
@media(max-width:800px){.gate{grid-template-columns:1fr}.gate-brand{padding:28px 24px}.gate-brand h1{margin-top:48px}}

/* shell */
.shell{display:grid;grid-template-columns:232px 1fr;min-height:100vh}
.side{background:var(--navy);color:#fff;padding:24px 16px;display:flex;flex-direction:column;position:sticky;top:0;height:100vh}
.side .logo{padding:0 8px 24px}
.side nav{display:flex;flex-direction:column;gap:2px}
.side nav a{color:#B7C7D4;text-decoration:none;padding:10px 12px;border-radius:4px;font-weight:500}
.side nav a:hover{background:var(--navy-2);color:#fff}
.side nav a.on{background:#fff;color:var(--navy);font-weight:600}
.who{margin-top:auto;display:grid;grid-template-columns:36px 1fr;gap:10px;align-items:center;padding:12px 8px 0;border-top:1px solid var(--navy-2)}
.who img{width:36px;height:36px;border-radius:50%;background:var(--navy-2)}
.uname{font-weight:600;font-size:14px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.uemail{font-size:12px;color:#9FB2C2;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.linkbtn{grid-column:1/-1;background:none;border:0;color:#B7C7D4;text-align:left;padding:6px 0;font-size:14px}
.linkbtn:hover{color:#fff}
.main{padding:32px clamp(16px,4vw,48px) 64px;max-width:1040px;width:100%}
.top{display:flex;justify-content:space-between;align-items:flex-start;gap:16px;margin-bottom:24px}
.top p{margin:4px 0 0}
@media(max-width:800px){
  .shell{grid-template-columns:1fr}
  .side{position:static;height:auto;flex-direction:row;flex-wrap:wrap;align-items:center;gap:8px;padding:12px}
  .side .logo{padding:0 8px}.side nav{flex-direction:row;order:3;width:100%}
  .who{margin:0 0 0 auto;border:0;padding:0;grid-template-columns:36px;}
  .who>div{display:none}.who .linkbtn{display:none}
}

/* cards */
.card{background:var(--card);border:1px solid var(--line);border-radius:6px;padding:24px;margin-bottom:20px}
.grid{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:20px}
.grid .card{margin-bottom:0}.col{display:flex;flex-direction:column;gap:20px}
.grid{margin-bottom:20px}
@media(max-width:800px){.grid{grid-template-columns:1fr}}

/* connection */
.conn{display:flex;align-items:center;gap:8px;font-size:14px;font-weight:600;padding:6px 12px;border:1px solid var(--line);border-radius:99px;background:#fff;white-space:nowrap}
.conn i{width:9px;height:9px;border-radius:50%;background:var(--muted)}
.conn.on i{background:var(--safe)} .conn.off i{background:var(--stop)}

/* gauge */
.gauge-card{display:flex;flex-direction:column;align-items:center;justify-content:center;text-align:center}
.gauge{position:relative;width:min(100%,260px)}
.gauge svg{display:block;width:100%}
.g-bg,.g-fill{fill:none;stroke-width:14}
.g-bg{stroke:var(--paper)}
.g-fill{stroke:var(--safe);stroke-linecap:round;stroke-dasharray:590.6;stroke-dashoffset:590.6;transition:stroke-dashoffset .8s,stroke .3s}
.g-text{position:absolute;inset:0;display:flex;flex-direction:column;align-items:center;justify-content:center}
.g-used{font:800 clamp(30px,5vw,40px)/1 var(--head);letter-spacing:-.02em;font-variant-numeric:tabular-nums}
.g-left{margin-top:16px;font-weight:600}

/* live + buttons */
.live{display:flex;gap:10px;flex-wrap:wrap;margin-bottom:18px}
.pill{padding:6px 12px;border:1px solid var(--line);border-radius:4px;font-size:14px;color:var(--muted)}
.pill b{font-weight:600;margin-left:4px}
.pill.on{border-color:var(--stop);background:#FBECED;color:var(--stop)}
.btn{background:var(--ink);color:#fff;border:0;border-radius:4px;padding:11px 18px}
.btn.danger{background:var(--stop)} .btn.ghost{background:transparent;color:var(--ink);border:1px solid var(--line)}
.btn.wide{width:100%} .btn:disabled{opacity:.5;cursor:not-allowed}
.chips{display:flex;gap:8px;flex-wrap:wrap}
.chips button{background:var(--paper);border:1px solid var(--line);border-radius:4px;padding:9px 14px;color:var(--ink)}
.chips button:hover{border-color:var(--ink)} .chips button.on{background:var(--ink);color:#fff;border-color:var(--ink)}

/* events */
.events{list-style:none;margin:0;padding:0}
.events li{display:grid;grid-template-columns:76px 1fr;gap:12px;padding:10px 0;border-top:1px solid var(--line)}
.events li:first-child{border-top:0}
.events time{color:var(--muted);font-size:14px;font-variant-numeric:tabular-nums}
.events .t-limit{color:var(--stop);font-weight:600}.events .t-remote{color:var(--warn);font-weight:600}

/* chart */
.chart{display:grid;grid-auto-flow:column;grid-auto-columns:1fr;gap:8px;align-items:end;height:260px;position:relative;padding-bottom:26px}
.bar{position:relative;display:flex;flex-direction:column;justify-content:flex-end;height:100%}
.bar i{display:block;background:var(--safe);border-radius:3px 3px 0 0;min-height:2px}
.bar.over i{background:var(--stop)}
.bar span{position:absolute;bottom:-24px;left:0;right:0;text-align:center;font-size:12px;color:var(--muted)}
.bar em{position:absolute;left:0;right:0;text-align:center;font-style:normal;font-size:11px;color:var(--muted)}
.limitline{position:absolute;left:0;right:0;border-top:2px dashed var(--ink);opacity:.45;pointer-events:none}

/* settings */
.fields{display:flex;gap:12px;align-items:end;flex-wrap:wrap}
.fields label{display:flex;flex-direction:column;gap:6px;font-weight:600;font-size:14px}
input{font:inherit;color:var(--ink);background:var(--paper);border:1px solid var(--line);border-radius:4px;padding:10px 12px;width:110px}
@media(prefers-reduced-motion:reduce){*{transition:none!important}}