:root {
  --navy: #23304f;
  --navy-2: #2b3a5c;
  --navy-3: #34456a;
  --green: #4cb97d;
  --green-d: #3aa86c;
  --bg: #f4f6fa;
  --surface: #ffffff;
  --text: #1f2738;
  --muted: #707b90;
  --border: #e7eaf0;
  --border-2: #eef1f6;
  --danger: #d9534f;
  --warn: #e0a106;
  --radius: 10px;
  --font: 'Avenir Next', 'Segoe UI', system-ui, -apple-system, 'Helvetica Neue', sans-serif;
}

* { box-sizing: border-box; }
html, body { height: 100%; margin: 0; }
body {
  font-family: var(--font);
  color: var(--text);
  background: var(--bg);
  font-size: 14px;
  -webkit-font-smoothing: antialiased;
}
button, input, select { font-family: inherit; font-size: inherit; color: inherit; }

.app { display: grid; grid-template-columns: 244px 1fr; height: 100vh; }

/* ---------- Sidebar ---------- */
.sidebar {
  background: var(--navy);
  color: #cdd6e6;
  display: flex;
  flex-direction: column;
  padding: 22px 14px;
}
.brand { display: flex; align-items: center; gap: 11px; padding: 4px 8px 22px; }
.brand img { width: 38px; height: 38px; }
.brand .wm { line-height: 1.1; }
.brand .wm b { color: #fff; font-size: 16px; letter-spacing: .2px; display: block; }
.brand .wm span { color: #8da0c0; font-size: 11px; letter-spacing: .5px; text-transform: uppercase; }

.nav { display: flex; flex-direction: column; gap: 2px; margin-top: 6px; }
.nav a {
  display: flex; align-items: center; gap: 11px;
  padding: 10px 12px; border-radius: 8px;
  color: #b9c4d8; text-decoration: none; cursor: pointer;
  transition: background .14s, color .14s;
  font-weight: 500;
}
.nav a .ic { width: 18px; text-align: center; opacity: .85; }
.nav a:hover { background: var(--navy-2); color: #fff; }
.nav a.active { background: var(--green); color: #fff; }
.nav a.active .ic { opacity: 1; }

.sidebar .station {
  margin-top: auto; display: flex; align-items: center; gap: 10px;
  padding: 11px 12px; background: var(--navy-2); border-radius: 9px; cursor: pointer;
  transition: background .14s;
}
.sidebar .station:hover { background: var(--navy-3); }
.sidebar .station .ic { font-size: 17px; }
.sidebar .station small { color: #8da0c0; font-size: 10.5px; text-transform: uppercase; letter-spacing: .5px; display: block; }
.sidebar .station b { color: #fff; font-size: 13.5px; }
.sidebar .foot { padding: 12px 12px 0; font-size: 11px; color: #6f7d99; }

/* ---------- Main ---------- */
.main { overflow-y: auto; }
.topbar {
  position: sticky; top: 0; z-index: 5;
  background: rgba(244,246,250,.86);
  backdrop-filter: blur(6px);
  border-bottom: 1px solid var(--border);
  padding: 20px 30px 16px;
}
.topbar h1 { margin: 0; font-size: 20px; font-weight: 650; letter-spacing: -.2px; }
.topbar p { margin: 3px 0 0; color: var(--muted); font-size: 13px; }
.content { padding: 24px 30px 50px; }

.page { display: none; }
.page.active { display: block; animation: fade .25s ease; }
@keyframes fade { from { opacity: 0; transform: translateY(4px); } to { opacity: 1; transform: none; } }

/* ---------- Cards / panels ---------- */
.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 18px 20px;
}
.card + .card { margin-top: 16px; }
.card h2 { margin: 0 0 14px; font-size: 15px; font-weight: 650; }
.card .sub { color: var(--muted); font-size: 12.5px; margin: -8px 0 14px; }

.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }

/* stat tiles */
.stat { display: flex; flex-direction: column; gap: 6px; }
.stat .v { font-size: 30px; font-weight: 700; letter-spacing: -1px; color: var(--navy); }
.stat .l { color: var(--muted); font-size: 12.5px; text-transform: uppercase; letter-spacing: .4px; }
.stat .ic { font-size: 20px; }

/* KPI tiles */
.kpis { display: grid; grid-template-columns: repeat(5, 1fr); gap: 14px; }
.kpi {
  background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 16px 16px 15px; position: relative; overflow: hidden;
}
.kpi .ic { font-size: 16px; opacity: .9; }
.kpi .v { font-size: 27px; font-weight: 750; letter-spacing: -1px; color: var(--navy); margin-top: 7px; line-height: 1; }
.kpi .l { color: var(--muted); font-size: 11.5px; text-transform: uppercase; letter-spacing: .3px; margin-top: 6px; }
.kpi.accent { background: linear-gradient(160deg, #4cb97d, #3aa86c); border-color: transparent; }
.kpi.accent .v, .kpi.accent .l, .kpi.accent .ic { color: #fff; }
.kpi.accent .l { color: #e4f6ec; }
.kpi.dark { background: var(--navy); border-color: transparent; }
.kpi.dark .v { color: #fff; } .kpi.dark .l { color: #9fb0cc; } .kpi.dark .ic { color: #9fb0cc; }

/* charts */
.chart { width: 100%; }
.chart svg { display: block; width: 100%; height: auto; overflow: visible; }
.chart .empty-c { color: var(--muted); font-size: 13px; padding: 30px 4px; text-align: center; }
.chart text { font-family: var(--font); fill: var(--muted); }
.bar-h-row { display: flex; align-items: center; gap: 10px; margin: 9px 0; }
.bar-h-row .nm { width: 130px; font-size: 12.5px; color: var(--text); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.bar-h-row .track { flex: 1; height: 22px; background: #f1f4f8; border-radius: 6px; overflow: hidden; }
.bar-h-row .track > i { display: block; height: 100%; border-radius: 6px; background: var(--green); transition: width .5s ease; }
.bar-h-row .track > i.navy { background: var(--navy-3); }
.bar-h-row .val { width: 42px; text-align: right; font-size: 12.5px; font-weight: 600; color: var(--navy); font-variant-numeric: tabular-nums; }

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex; align-items: center; gap: 7px;
  padding: 9px 15px; border-radius: 8px; border: 1px solid transparent;
  background: var(--green); color: #fff; font-weight: 600; cursor: pointer;
  transition: background .14s, border-color .14s, opacity .14s;
}
.btn:hover { background: var(--green-d); }
.btn:disabled { opacity: .5; cursor: not-allowed; }
.btn.ghost { background: transparent; color: var(--navy); border-color: var(--border); }
.btn.ghost:hover { background: #f0f3f8; }
.btn.dark { background: var(--navy); }
.btn.dark:hover { background: var(--navy-2); }
.btn.sm { padding: 6px 11px; font-size: 12.5px; }
.btn.danger { background: transparent; color: var(--danger); border-color: #f0d6d5; }
.btn.danger:hover { background: #fbeeed; }

.toolbar { display: flex; gap: 10px; flex-wrap: wrap; align-items: flex-end; margin-bottom: 16px; }

/* ---------- Inputs ---------- */
.field { display: flex; flex-direction: column; gap: 5px; }
.field label { font-size: 12px; color: var(--muted); font-weight: 600; }
input[type=text], input[type=password], input[type=number], input[type=date], select {
  padding: 9px 11px; border: 1px solid var(--border); border-radius: 8px;
  background: #fff; outline: none; transition: border-color .14s;
  min-width: 130px;
}
input:focus, select:focus { border-color: var(--green); }
.search { position: relative; display: flex; align-items: center; }
.search .ic { position: absolute; left: 11px; color: var(--muted); font-size: 15px; pointer-events: none; }
.search input { width: 100%; padding-left: 32px; }
.check { display: flex; align-items: center; gap: 7px; font-size: 13px; color: var(--text); }
.check input { width: 16px; height: 16px; accent-color: var(--green); }

/* ---------- Tables ---------- */
.table-wrap { border: 1px solid var(--border); border-radius: var(--radius); overflow: hidden; background: #fff; }
table { width: 100%; border-collapse: collapse; }
th {
  text-align: left; font-size: 11.5px; text-transform: uppercase; letter-spacing: .4px;
  color: var(--muted); font-weight: 650; padding: 11px 14px; background: #f8fafc;
  border-bottom: 1px solid var(--border); position: sticky; top: 0;
}
td { padding: 10px 14px; border-bottom: 1px solid var(--border-2); }
tr:last-child td { border-bottom: none; }
tbody tr:hover { background: #f9fbfd; }
.muted { color: var(--muted); }
.mono { font-variant-numeric: tabular-nums; }

/* pills */
.pill {
  display: inline-block; padding: 3px 9px; border-radius: 999px;
  font-size: 11.5px; font-weight: 600;
}
.pill.green { background: #e7f6ee; color: var(--green-d); }
.pill.navy { background: #e9edf4; color: var(--navy-2); }
.pill.gray { background: #eef1f5; color: var(--muted); }
.pill.red { background: #fbeceb; color: var(--danger); }
.pill.amber { background: #fdf3da; color: #9a7106; }

.dot { width: 8px; height: 8px; border-radius: 50%; display: inline-block; margin-right: 6px; }
.dot.on { background: var(--green); }
.dot.off { background: #c4ccd8; }
.dot.err { background: var(--danger); }

/* device card list */
.dev-list { display: grid; grid-template-columns: repeat(2, 1fr); gap: 14px; }
.dev {
  border: 1px solid var(--border); border-radius: var(--radius); background: #fff;
  padding: 16px; display: flex; flex-direction: column; gap: 10px;
}
.dev.off { opacity: .62; background: #fbfcfd; border-style: dashed; }
.dev .top { display: flex; justify-content: space-between; align-items: flex-start; gap: 8px; }
.dev .name { font-weight: 650; font-size: 15px; }
.dev .meta { color: var(--muted); font-size: 12.5px; line-height: 1.7; }
.dev .meta b { color: var(--text); font-weight: 600; }
.dev .actions { display: flex; gap: 8px; margin-top: 2px; }

/* sync rows */
.sync-row {
  display: flex; align-items: center; gap: 12px; padding: 12px 14px;
  border: 1px solid var(--border); border-radius: 8px; margin-bottom: 8px; background: #fff;
}
.sync-row .nm { font-weight: 600; flex: 1; }
.sync-row .st { font-size: 12.5px; }
.bar { height: 6px; background: #eef1f6; border-radius: 4px; overflow: hidden; flex: 1; max-width: 240px; }
.bar > i { display: block; height: 100%; background: var(--green); width: 0; transition: width .2s; }

/* empty state */
.empty { text-align: center; color: var(--muted); padding: 50px 20px; }
.empty .ic { font-size: 34px; opacity: .5; }
.empty p { margin: 10px 0 4px; font-size: 15px; color: var(--text); font-weight: 600; }
.empty small { font-size: 12.5px; }

/* ---------- Modal ---------- */
.overlay {
  position: fixed; inset: 0; background: rgba(31,39,56,.45);
  display: none; align-items: center; justify-content: center; z-index: 50;
}
.overlay.open { display: flex; }
.modal {
  background: #fff; border-radius: 14px; width: 480px; max-width: 92vw;
  padding: 22px 24px; border: 1px solid var(--border);
}
.modal h3 { margin: 0 0 4px; font-size: 17px; }
.modal .sub { color: var(--muted); font-size: 13px; margin-bottom: 16px; }
.modal .row { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; margin-bottom: 12px; }
.modal .row.one { grid-template-columns: 1fr; }
.modal .foot { display: flex; justify-content: flex-end; gap: 10px; margin-top: 18px; }
.modal .field input { width: 100%; }

/* wizard */
.modal.wiz { width: 520px; }
.wiz-head { display: flex; align-items: center; gap: 13px; margin-bottom: 16px; }
.wiz-head img { width: 46px; height: 46px; }
.wiz-head h3 { margin: 0; }
.wiz-steps { display: flex; gap: 6px; margin-bottom: 18px; }
.wiz-steps i { height: 4px; flex: 1; background: var(--border); border-radius: 3px; transition: background .2s; }
.wiz-steps i.on { background: var(--green); }
.wiz-step p { margin: 0 0 14px; line-height: 1.6; }
.wiz-list { margin: 6px 0 0; padding-left: 20px; line-height: 1.9; }
.wiz-step .row { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.wiz-step .field input { width: 100%; }

/* toast */
#toasts { position: fixed; bottom: 22px; right: 22px; display: flex; flex-direction: column; gap: 8px; z-index: 80; }
.toast {
  background: var(--navy); color: #fff; padding: 11px 16px; border-radius: 9px;
  font-size: 13px; animation: slidein .2s ease; max-width: 360px;
}
.toast.ok { background: var(--green-d); }
.toast.err { background: var(--danger); }
@keyframes slidein { from { transform: translateX(20px); opacity: 0; } to { transform: none; opacity: 1; } }

.spin { display: inline-block; width: 14px; height: 14px; border: 2px solid rgba(255,255,255,.4); border-top-color: #fff; border-radius: 50%; animation: rot .7s linear infinite; }
.btn.ghost .spin { border-color: rgba(35,48,79,.25); border-top-color: var(--navy); }
@keyframes rot { to { transform: rotate(360deg); } }

.hint { font-size: 12px; color: var(--muted); margin-top: 8px; line-height: 1.6; }
.hint b { color: var(--text); }