:root {
  --bg: #0b0614;
  --bg-2: #130a23;
  --panel: #1a0f2e;
  --panel-2: #211538;
  --border: #2e1d4d;
  --border-2: #3d2769;
  --text: #ece7f5;
  --muted: #9b8bc4;
  --accent: #a855f7;
  --accent-2: #7c3aed;
  --accent-glow: rgba(168, 85, 247, .35);
  --green: #34d399;
  --red: #f87171;
  --amber: #fbbf24;
  --blue: #60a5fa;
}

* { box-sizing: border-box; }
html, body {
  margin: 0; height: 100%;
  background: radial-gradient(1200px 600px at 15% -10%, #2a1450 0%, var(--bg) 55%);
  color: var(--text);
  font: 14px/1.5 "Inter", "Segoe UI", system-ui, sans-serif;
}
a { color: var(--accent); text-decoration: none; }
::selection { background: var(--accent-glow); }
::-webkit-scrollbar { width: 10px; height: 10px; }
::-webkit-scrollbar-thumb { background: var(--border-2); border-radius: 6px; }
::-webkit-scrollbar-track { background: transparent; }

/* ---- layout ---- */
.app { display: grid; grid-template-columns: 248px 1fr; height: 100vh; }
.sidebar {
  background: linear-gradient(180deg, var(--bg-2), var(--bg));
  border-right: 1px solid var(--border);
  display: flex; flex-direction: column; overflow-y: auto;
}
.brand {
  padding: 20px 18px; font-size: 20px; font-weight: 800; letter-spacing: .5px;
  display: flex; align-items: center; gap: 10px;
}
.brand .logo {
  width: 30px; height: 30px; border-radius: 8px;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  box-shadow: 0 0 18px var(--accent-glow);
  display: grid; place-items: center; font-size: 16px;
}
.brand .sub { font-size: 10px; color: var(--muted); font-weight: 500; letter-spacing: 2px; }

.nav-group { padding: 6px 10px; }
.nav-group h4 {
  margin: 12px 8px 6px; font-size: 10px; text-transform: uppercase;
  letter-spacing: 1.5px; color: var(--muted); font-weight: 700;
}
.nav-item {
  display: flex; align-items: center; gap: 10px; padding: 9px 12px;
  border-radius: 9px; cursor: pointer; color: var(--text);
  font-weight: 500; transition: all .12s; margin: 1px 0;
}
.nav-item:hover { background: var(--panel); }
.nav-item.active {
  background: linear-gradient(90deg, var(--accent-2), transparent);
  box-shadow: inset 2px 0 0 var(--accent);
}
.nav-item .ic { width: 18px; text-align: center; opacity: .9; }

.main { display: flex; flex-direction: column; overflow: hidden; }
.topbar {
  display: flex; align-items: center; justify-content: space-between;
  padding: 14px 24px; border-bottom: 1px solid var(--border);
  background: rgba(19,10,35,.6); backdrop-filter: blur(8px);
}
.topbar h1 { font-size: 18px; margin: 0; font-weight: 700; }
.topbar .crumb { color: var(--muted); font-weight: 400; font-size: 13px; }
.user-chip {
  display: flex; align-items: center; gap: 8px; font-size: 13px;
  background: var(--panel); padding: 6px 12px; border-radius: 20px;
  border: 1px solid var(--border);
}
.user-chip .dot { width: 8px; height: 8px; border-radius: 50%; background: var(--green); box-shadow: 0 0 8px var(--green); }

.content { padding: 20px 24px; overflow-y: auto; flex: 1; }

/* ---- sub-tabs ---- */
.subtabs { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 18px; }
.pill {
  padding: 7px 14px; border-radius: 20px; cursor: pointer; font-size: 13px;
  background: var(--panel); border: 1px solid var(--border); color: var(--muted);
  transition: all .12s; font-weight: 500;
}
.pill:hover { color: var(--text); border-color: var(--border-2); }
.pill.active { background: var(--accent-2); color: #fff; border-color: var(--accent); box-shadow: 0 0 14px var(--accent-glow); }

/* ---- cards / tables ---- */
.card {
  background: linear-gradient(180deg, var(--panel), var(--panel-2));
  border: 1px solid var(--border); border-radius: 14px; padding: 18px; margin-bottom: 18px;
}
.card h3 { margin: 0 0 14px; font-size: 15px; display: flex; align-items: center; gap: 8px; }
.toolbar { display: flex; align-items: center; justify-content: space-between; margin-bottom: 14px; gap: 12px; }
.toolbar .title { font-size: 16px; font-weight: 700; }
.toolbar .meta { color: var(--muted); font-size: 12px; }

table { width: 100%; border-collapse: collapse; font-size: 13px; }
th, td { text-align: left; padding: 9px 12px; border-bottom: 1px solid var(--border); }
th { color: var(--muted); font-weight: 600; text-transform: uppercase; font-size: 10.5px; letter-spacing: .6px; position: sticky; top: 0; background: var(--panel-2); }
tr:hover td { background: rgba(168,85,247,.06); }
td .id { color: var(--muted); font-variant-numeric: tabular-nums; }
.table-wrap { max-height: calc(100vh - 320px); overflow: auto; border-radius: 10px; border: 1px solid var(--border); }

/* ---- buttons ---- */
.btn {
  padding: 8px 14px; border-radius: 9px; border: 1px solid var(--border-2);
  background: var(--panel); color: var(--text); cursor: pointer; font-size: 13px;
  font-weight: 600; transition: all .12s;
}
.btn:hover { border-color: var(--accent); }
.btn-primary { background: linear-gradient(135deg, var(--accent), var(--accent-2)); border: none; box-shadow: 0 0 14px var(--accent-glow); }
.btn-primary:hover { filter: brightness(1.1); }
.btn-sm { padding: 4px 9px; font-size: 12px; border-radius: 7px; }
.btn-danger { color: var(--red); border-color: #5b2230; }
.btn-danger:hover { background: #2a1019; }
.btn-ghost { background: transparent; border-color: var(--border); }

/* ---- badges ---- */
.badge { padding: 2px 9px; border-radius: 20px; font-size: 11px; font-weight: 600; display: inline-block; }
.badge-green { background: rgba(52,211,153,.15); color: var(--green); }
.badge-red { background: rgba(248,113,113,.15); color: var(--red); }
.badge-amber { background: rgba(251,191,36,.15); color: var(--amber); }
.badge-blue { background: rgba(96,165,250,.15); color: var(--blue); }
.badge-purple { background: rgba(168,85,247,.18); color: var(--accent); }
.badge-gray { background: rgba(155,139,196,.15); color: var(--muted); }

/* ---- forms / modal ---- */
.modal-bg {
  position: fixed; inset: 0; background: rgba(5,2,12,.7); backdrop-filter: blur(4px);
  display: none; align-items: flex-start; justify-content: center; z-index: 50; padding: 40px 16px; overflow-y: auto;
}
.modal-bg.show { display: flex; }
.modal {
  background: linear-gradient(180deg, var(--panel), var(--panel-2));
  border: 1px solid var(--border-2); border-radius: 16px; width: 560px; max-width: 100%;
  box-shadow: 0 20px 60px rgba(0,0,0,.6);
}
.modal header { padding: 16px 20px; border-bottom: 1px solid var(--border); font-weight: 700; font-size: 15px; display: flex; justify-content: space-between; align-items: center; }
.modal .body { padding: 18px 20px; max-height: 60vh; overflow-y: auto; }
.modal footer { padding: 14px 20px; border-top: 1px solid var(--border); display: flex; justify-content: flex-end; gap: 10px; }
.field { margin-bottom: 13px; }
.field label { display: block; font-size: 12px; color: var(--muted); margin-bottom: 5px; font-weight: 600; }
.field input, .field select, .field textarea {
  width: 100%; padding: 9px 11px; border-radius: 9px; background: var(--bg);
  border: 1px solid var(--border-2); color: var(--text); font: inherit;
}
.field input:focus, .field select:focus, .field textarea:focus { outline: none; border-color: var(--accent); box-shadow: 0 0 0 3px var(--accent-glow); }
.field textarea { min-height: 80px; resize: vertical; font-family: ui-monospace, monospace; font-size: 12px; }
.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 0 14px; }

/* ---- KPI tiles ---- */
.kpis { display: grid; grid-template-columns: repeat(auto-fit, minmax(150px, 1fr)); gap: 14px; margin-bottom: 18px; }
.kpi { background: linear-gradient(180deg, var(--panel), var(--panel-2)); border: 1px solid var(--border); border-radius: 14px; padding: 16px; }
.kpi .n { font-size: 26px; font-weight: 800; color: var(--accent); }
.kpi .l { font-size: 12px; color: var(--muted); margin-top: 2px; }

/* ---- rack elevation ---- */
.rack-wrap { display: flex; gap: 30px; flex-wrap: wrap; }
.rack { width: 280px; }
.rack .face-label { text-align: center; font-weight: 700; margin-bottom: 8px; color: var(--muted); }
.rack-frame { border: 2px solid var(--border-2); border-radius: 8px; overflow: hidden; background: var(--bg); }
.ru { display: flex; align-items: stretch; height: 22px; border-bottom: 1px solid var(--border); font-size: 11px; }
.ru:last-child { border-bottom: none; }
.ru .u-num { width: 30px; text-align: center; color: var(--muted); background: var(--bg-2); display: grid; place-items: center; font-variant-numeric: tabular-nums; border-right: 1px solid var(--border); }
.ru .u-slot { flex: 1; display: flex; align-items: center; padding: 0 8px; }
.ru.occupied .u-slot { background: linear-gradient(90deg, var(--accent-2), var(--panel)); color: #fff; font-weight: 600; }
.ru.empty .u-slot { color: #4a3a6e; }

/* ---- misc ---- */
.tool-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
.code { font-family: ui-monospace, monospace; font-size: 12.5px; white-space: pre-wrap; background: var(--bg); border: 1px solid var(--border); border-radius: 10px; padding: 14px; max-height: 420px; overflow: auto; }
.empty { text-align: center; padding: 40px; color: var(--muted); }
.kv { display: grid; grid-template-columns: 160px 1fr; gap: 6px 14px; font-size: 13px; }
.kv .k { color: var(--muted); }
.toast { position: fixed; bottom: 24px; right: 24px; background: var(--panel-2); border: 1px solid var(--accent); padding: 12px 18px; border-radius: 10px; box-shadow: 0 8px 30px rgba(0,0,0,.5); z-index: 100; transform: translateY(80px); opacity: 0; transition: all .25s; }
.toast.show { transform: translateY(0); opacity: 1; }
.toast.err { border-color: var(--red); }
.flex { display: flex; align-items: center; gap: 10px; }
.muted { color: var(--muted); }
small.hint { color: var(--muted); font-size: 11px; }