:root{
  --paper:#ffffff;
  --wash:#f2f5fa;
  --ink:#0c1b2e;
  --muted:#5a6a80;
  --line:#d9e1ec;
  --line-soft:#e9eef5;
  --brand:#0b3fa8;
  --brand-lift:#1257d6;
  --up:#0e7a4f;
  --idle:#8794a6;
  --danger:#b3261e;
  --warn:#a65a17;
  --rail:232px;
  --r:4px;
}

*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;background:var(--wash);color:var(--ink);
  font-family:"IBM Plex Sans",system-ui,-apple-system,"Segoe UI",sans-serif;
  font-size:15px;line-height:1.5;
}
a{color:var(--brand);text-decoration:none}
a:hover{color:var(--brand-lift)}
h1,h2,h3{margin:0;font-weight:600;letter-spacing:-.012em}
h1{font-size:25px}
h2{font-size:17px}
.mono{font-family:"IBM Plex Mono",ui-monospace,monospace;font-variant-numeric:tabular-nums}
:focus-visible{outline:2px solid var(--brand-lift);outline-offset:2px}
.skip{position:absolute;left:-9999px}
.skip:focus{left:12px;top:12px;background:var(--paper);padding:8px 12px;z-index:9}

/* ---------- shell ---------- */
.shell{display:flex;min-height:100vh}
.rail{
  width:var(--rail);flex:0 0 var(--rail);background:var(--paper);
  border-right:1px solid var(--line);display:flex;flex-direction:column;
  position:sticky;top:0;height:100vh;padding:22px 18px;
}
.brand{display:flex;align-items:center;gap:9px;color:var(--ink);font-weight:700;letter-spacing:-.02em;font-size:18px}
.brand-mark{
  width:14px;height:14px;border-radius:50%;
  background:radial-gradient(circle at 32% 30%,#57a9f0,var(--brand) 70%);
  box-shadow:0 0 0 3px rgba(11,63,168,.10);
}
.rail-nav{list-style:none;margin:30px 0 auto;padding:0;display:flex;flex-direction:column;gap:2px}
.rail-nav a{
  display:block;padding:8px 10px;border-radius:var(--r);color:var(--muted);font-weight:500;
}
.rail-nav a:hover{background:var(--wash);color:var(--ink)}
.rail-nav a[aria-current]{background:rgba(11,63,168,.07);color:var(--brand);font-weight:600}
.rail-foot{border-top:1px solid var(--line-soft);padding-top:14px;font-size:13px;color:var(--muted)}
.langs{display:flex;gap:6px;margin-bottom:10px}
.langs a{padding:2px 7px;border:1px solid var(--line);border-radius:var(--r);color:var(--muted);font-size:12px;font-weight:500}
.langs a.on{border-color:var(--brand);color:var(--brand);background:rgba(11,63,168,.06)}
.whoami{color:var(--ink);font-weight:500;overflow:hidden;text-overflow:ellipsis}
.signout{font-size:13px}

main{flex:1;min-width:0;padding:34px 40px 64px;max-width:1080px}
.page-head{display:flex;align-items:baseline;justify-content:space-between;gap:16px;margin-bottom:22px;flex-wrap:wrap}
.sub{color:var(--muted);font-size:14px}
.back{font-size:13px;color:var(--muted)}
.back:hover{color:var(--brand)}

.impersonate{
  display:flex;gap:14px;align-items:center;justify-content:space-between;flex-wrap:wrap;
  background:#fff5e6;border:1px solid #f0d5ab;border-radius:var(--r);
  padding:9px 14px;margin-bottom:22px;font-size:13px;color:#7a4a12;
}

/* ---------- rack: one row per service ---------- */
.rack{background:var(--paper);border:1px solid var(--line);border-radius:var(--r);overflow:hidden}
.unit{
  display:grid;grid-template-columns:5px 1.6fr 1fr auto;align-items:center;gap:0 18px;
  border-bottom:1px solid var(--line-soft);
}
.unit:last-child{border-bottom:0}
.unit .edge{align-self:stretch;background:var(--idle)}
.unit[data-state="running"] .edge{background:var(--up)}
.unit[data-state="unreachable"] .edge{background:var(--danger)}
.unit[data-suspended="1"] .edge{background:var(--warn)}
.unit-main{padding:15px 0 15px 16px;min-width:0}
.unit-main .name{font-weight:600;display:block;color:var(--ink);letter-spacing:-.01em}
.unit-main .name:hover{color:var(--brand)}
.unit-meta{color:var(--muted);font-size:13px;margin-top:2px;display:flex;gap:12px;flex-wrap:wrap}
.tag{
  display:inline-block;padding:1px 7px;border:1px solid var(--line);border-radius:2px;
  font-size:11px;font-weight:600;letter-spacing:.04em;color:var(--muted);
}
.os{
  display:inline-flex;align-items:center;gap:5px;margin-left:8px;vertical-align:1px;
  font-size:11px;font-weight:600;letter-spacing:.01em;padding:2px 7px;border-radius:2px;
  border:1px solid var(--line);color:var(--muted);white-space:nowrap;
}
.os svg{fill:currentColor}
.os-windows{color:#1257d6;border-color:#c3d6f6;background:rgba(18,87,214,.06)}
.os-linux{color:#7a5510;border-color:#e6d3ab;background:rgba(166,90,23,.06)}
h1 .os{font-size:12px;vertical-align:4px}

.unit-stat{padding:15px 0;color:var(--muted);font-size:13px;display:flex;gap:20px;flex-wrap:wrap}
.unit-stat b{display:block;color:var(--ink);font-weight:600}
.unit-act{padding:12px 16px 12px 0;display:flex;gap:8px;align-items:center}

.state{display:inline-flex;align-items:center;gap:7px;font-weight:600;font-size:13px}
.dot{width:8px;height:8px;border-radius:50%;background:var(--idle);flex:0 0 8px}
[data-state="running"] .dot{background:var(--up);box-shadow:0 0 0 3px rgba(14,122,79,.14)}
[data-state="unreachable"] .dot{background:var(--danger)}
@media (prefers-reduced-motion:no-preference){
  [data-state="running"] .dot{animation:pulse 2.6s ease-in-out infinite}
}
@keyframes pulse{0%,100%{box-shadow:0 0 0 3px rgba(14,122,79,.14)}50%{box-shadow:0 0 0 6px rgba(14,122,79,.04)}}

/* ---------- buttons ---------- */
.btn{
  font:inherit;font-size:13px;font-weight:600;padding:7px 13px;border-radius:var(--r);
  border:1px solid var(--line);background:var(--paper);color:var(--ink);cursor:pointer;
}
.btn:hover:not(:disabled){border-color:var(--ink);}
.btn:disabled{opacity:.45;cursor:not-allowed}
.btn-primary{background:var(--brand);border-color:var(--brand);color:#fff}
.btn-primary:hover:not(:disabled){background:var(--brand-lift);border-color:var(--brand-lift)}
.btn-danger{color:var(--danger)}
.btn-danger:hover:not(:disabled){border-color:var(--danger)}
.btn-sm{padding:5px 10px;font-size:12px}
.btn.busy{position:relative;color:transparent}
.btn.busy::after{
  content:"";position:absolute;inset:0;margin:auto;width:13px;height:13px;border-radius:50%;
  border:2px solid rgba(12,27,46,.25);border-top-color:var(--ink);animation:spin .7s linear infinite;
}
.btn-primary.busy::after{border-color:rgba(255,255,255,.4);border-top-color:#fff}
@keyframes spin{to{transform:rotate(360deg)}}

/* ---------- detail ---------- */
.headline{
  background:var(--paper);border:1px solid var(--line);border-radius:var(--r);
  padding:22px 24px;display:flex;justify-content:space-between;gap:24px;flex-wrap:wrap;align-items:flex-start;
}
.headline .big{font-size:27px;font-weight:600;letter-spacing:-.02em;display:flex;align-items:center;gap:11px}
.headline .big .dot{width:11px;height:11px;flex:0 0 11px}
.headline .where{color:var(--muted);font-size:13px;margin-top:6px}
.controls{display:flex;gap:8px;flex-wrap:wrap}

.grid{display:grid;grid-template-columns:repeat(4,1fr);background:var(--paper);
  border:1px solid var(--line);border-top:0;border-radius:0 0 var(--r) var(--r)}
.headline{border-radius:var(--r) var(--r) 0 0}
.cell{padding:16px 20px;border-left:1px solid var(--line-soft)}
.cell:first-child{border-left:0}
.cell .k{color:var(--muted);font-size:12px;font-weight:500}
.cell .v{font-size:19px;font-weight:600;margin-top:3px;letter-spacing:-.01em}
.bar{height:3px;background:var(--line-soft);border-radius:2px;margin-top:9px;overflow:hidden}
.bar span{display:block;height:100%;background:var(--brand);border-radius:2px;transition:width .4s ease}
.bar span.hot{background:var(--warn)}

.panel{background:var(--paper);border:1px solid var(--line);border-radius:var(--r);margin-top:22px}
.panel-head{display:flex;justify-content:space-between;align-items:center;gap:16px;
  padding:14px 20px;border-bottom:1px solid var(--line-soft);flex-wrap:wrap}
.panel-body{padding:18px 20px}
.tabs{display:flex;gap:2px}
.tabs button{font:inherit;font-size:12px;font-weight:600;padding:5px 11px;border:1px solid transparent;
  background:none;color:var(--muted);border-radius:var(--r);cursor:pointer}
.tabs button:hover{background:var(--wash);color:var(--ink)}
.tabs button[aria-pressed="true"]{background:rgba(11,63,168,.07);color:var(--brand)}

.charts{display:grid;grid-template-columns:1fr 1fr;gap:20px}
.chart h3{font-size:12px;font-weight:600;color:var(--muted);margin-bottom:6px}
.chart svg{width:100%;height:120px;display:block}
.chart .now{font-size:13px;color:var(--ink);font-weight:600}

table.log{width:100%;border-collapse:collapse;font-size:13px}
table.log th{text-align:left;color:var(--muted);font-weight:500;padding:0 0 8px;font-size:12px}
table.log td{padding:8px 0;border-top:1px solid var(--line-soft)}
table.log td:last-child,table.log th:last-child{text-align:right;color:var(--muted)}

.notice{padding:11px 14px;border-radius:var(--r);font-size:13px;margin-bottom:16px}
.notice-warn{background:#fff6e8;border:1px solid #f0d5ab;color:#7a4a12}
.notice-err{background:#fdeceb;border:1px solid #f2c3c0;color:var(--danger)}
.notice-ok{background:#ecf7f1;border:1px solid #bfe3d0;color:var(--up)}
.empty{background:var(--paper);border:1px dashed var(--line);border-radius:var(--r);
  padding:42px 24px;text-align:center;color:var(--muted)}

/* ---------- forms / auth ---------- */
.auth{min-height:100vh;display:grid;place-items:center;padding:24px;background:var(--wash)}
.auth-box{width:100%;max-width:372px;background:var(--paper);border:1px solid var(--line);
  border-radius:var(--r);padding:30px}
.auth-box .brand{margin-bottom:22px}
label{display:block;font-size:13px;font-weight:500;margin:14px 0 5px}
input[type=text],input[type=email],input[type=password],input[type=number],input[type=date],select,textarea{
  width:100%;font:inherit;font-size:14px;padding:9px 11px;border:1px solid var(--line);
  border-radius:var(--r);background:var(--paper);color:var(--ink)
}
input:focus,select:focus,textarea:focus{border-color:var(--brand);outline:none;box-shadow:0 0 0 3px rgba(11,63,168,.1)}
.form-row{display:grid;grid-template-columns:1fr 1fr;gap:14px}
.hint{color:var(--muted);font-size:12px;margin-top:5px}
.actions{margin-top:20px;display:flex;gap:10px;align-items:center}

/* ---------- admin tables ---------- */
table.data{width:100%;border-collapse:collapse;background:var(--paper);
  border:1px solid var(--line);border-radius:var(--r);font-size:14px;overflow:hidden}
table.data th{text-align:left;font-size:12px;color:var(--muted);font-weight:500;
  padding:11px 16px;border-bottom:1px solid var(--line)}
table.data td{padding:12px 16px;border-bottom:1px solid var(--line-soft)}
table.data tr:last-child td{border-bottom:0}

/* ---------- responsive ---------- */
@media (max-width:900px){
  .shell{flex-direction:column}
  .rail{width:auto;height:auto;position:static;flex-direction:row;align-items:center;
    gap:16px;padding:12px 16px;border-right:0;border-bottom:1px solid var(--line);flex-wrap:wrap}
  .rail-nav{flex-direction:row;margin:0 auto 0 8px}
  .rail-foot{border:0;padding:0;display:flex;align-items:center;gap:12px}
  .whoami{display:none}
  main{padding:22px 16px 56px}
  .grid{grid-template-columns:1fr 1fr}
  .cell:nth-child(3){border-left:0}
  .cell:nth-child(n+3){border-top:1px solid var(--line-soft)}
  .charts{grid-template-columns:1fr}
  .unit{grid-template-columns:5px 1fr;row-gap:0}
  .unit-stat{grid-column:2;padding-top:0;padding-left:16px}
  .unit-act{grid-column:2;padding:0 16px 14px}
  .form-row{grid-template-columns:1fr}
}