:root {
  --bg: #0a0e14;
  --bg2: #0f141c;
  --card: #131a24;
  --card2: #182130;
  --border: #1f2937;
  --border2: #2b3a4e;
  --text: #e5eaf1;
  --muted: #8b98ab;
  --dim: #5b6879;
  --accent: #38bdf8;
  --ok: #10b981;
  --warn: #f59e0b;
  --crit: #ef4444;
  --offline: #64748b;
  --purple: #a78bfa;
  --radius: 12px;
  --mono: "SF Mono", SFMono-Regular, ui-monospace, "JetBrains Mono", Menlo, monospace;
}
* { box-sizing: border-box; margin: 0; padding: 0; }
html, body { height: 100%; }
body {
  background: var(--bg);
  color: var(--text);
  font: 14px/1.45 -apple-system, BlinkMacSystemFont, "Segoe UI", Inter, Roboto, sans-serif;
  -webkit-font-smoothing: antialiased;
}
.hidden { display: none !important; }
.muted { color: var(--muted); }
.dim { color: var(--dim); }
.mono { font-family: var(--mono); }

/* ---------- topbar ---------- */
#topbar {
  position: sticky; top: 0; z-index: 50;
  display: flex; align-items: center; gap: 20px;
  padding: 10px 20px;
  background: rgba(10,14,20,.85); backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}
.brand { font-weight: 700; letter-spacing: .06em; cursor: pointer; white-space: nowrap; display: flex; align-items: center; gap: 8px; }
.brand-thin { font-weight: 300; color: var(--accent); }
.brand-dot { width: 9px; height: 9px; border-radius: 50%; background: var(--accent); box-shadow: 0 0 10px var(--accent); display: inline-block; }
#topbar nav { display: flex; gap: 4px; }
#topbar nav a {
  color: var(--muted); text-decoration: none; padding: 6px 12px; border-radius: 8px; font-weight: 500;
}
#topbar nav a:hover { color: var(--text); background: var(--card); }
#topbar nav a.active { color: var(--text); background: var(--card2); }
.fleet-chips { display: flex; gap: 8px; flex: 1; justify-content: center; flex-wrap: wrap; }
.chip {
  display: inline-flex; align-items: center; gap: 6px;
  background: var(--card); border: 1px solid var(--border);
  padding: 3px 10px; border-radius: 999px; font-size: 12px; color: var(--muted); white-space: nowrap;
}
.chip b { color: var(--text); font-family: var(--mono); font-weight: 600; }
.chip.c-ok b { color: var(--ok); }
.chip.c-warn b { color: var(--warn); }
.chip.c-crit b { color: var(--crit); }
.top-right { display: flex; align-items: center; gap: 10px; white-space: nowrap; }
.badge {
  background: var(--crit); color: #fff; font-size: 11px; font-weight: 700;
  border-radius: 999px; padding: 1px 7px; margin-left: 2px;
}

/* ---------- layout ---------- */
main { padding: 20px; max-width: 1800px; margin: 0 auto; }
h1 { font-size: 20px; font-weight: 650; margin-bottom: 4px; }
h2 { font-size: 15px; font-weight: 600; margin: 18px 0 10px; color: var(--muted); text-transform: uppercase; letter-spacing: .05em; }

/* ---------- login ---------- */
.login-wrap { min-height: 100vh; display: flex; align-items: center; justify-content: center; }
.login-card {
  width: 340px; background: var(--card); border: 1px solid var(--border);
  border-radius: 16px; padding: 32px;
}
.login-card h1 { text-align: center; margin-bottom: 22px; }
.login-card .brand-dot { margin-right: 6px; }
.field { margin-bottom: 14px; }
.field label { display: block; font-size: 12px; color: var(--muted); margin-bottom: 5px; }
input[type=text], input[type=password], select {
  width: 100%; background: var(--bg2); color: var(--text);
  border: 1px solid var(--border2); border-radius: 8px; padding: 9px 12px; font-size: 14px; outline: none;
}
input:focus, select:focus { border-color: var(--accent); }
.login-err { color: var(--crit); font-size: 13px; min-height: 18px; margin-bottom: 8px; }

/* ---------- buttons ---------- */
.btn {
  background: var(--accent); color: #06202e; border: none; border-radius: 8px;
  padding: 9px 16px; font-size: 14px; font-weight: 600; cursor: pointer;
}
.btn:hover { filter: brightness(1.1); }
.btn-block { width: 100%; }
.btn-ghost { background: transparent; color: var(--muted); border: 1px solid var(--border2); padding: 5px 12px; font-weight: 500; }
.btn-ghost:hover { color: var(--text); border-color: var(--dim); filter: none; }
.btn-sm { padding: 3px 10px; font-size: 12px; border-radius: 6px; }

/* ---------- alert strip ---------- */
.alert-strip { display: flex; flex-direction: column; gap: 6px; margin-bottom: 16px; }
.alert-line {
  display: flex; align-items: center; gap: 10px;
  border-radius: 10px; padding: 8px 14px; font-size: 13px;
  background: rgba(239,68,68,.08); border: 1px solid rgba(239,68,68,.35);
  cursor: pointer;
}
.alert-line.warning { background: rgba(245,158,11,.07); border-color: rgba(245,158,11,.3); }
.alert-line .sev { font-weight: 700; font-size: 11px; letter-spacing: .05em; }
.alert-line.critical .sev { color: var(--crit); }
.alert-line.warning .sev { color: var(--warn); }
.alert-line .host { font-family: var(--mono); color: var(--accent); }
.alert-line .when { margin-left: auto; color: var(--dim); font-size: 12px; white-space: nowrap; }

/* ---------- device grid ---------- */
.grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(370px, 1fr)); gap: 14px; }
.card {
  background: var(--card); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 14px 16px; transition: border-color .15s;
}
.device-card { cursor: pointer; position: relative; overflow: hidden; }
.device-card:hover { border-color: var(--border2); background: var(--card2); }
.device-card.has-crit { border-color: rgba(239,68,68,.5); }
.device-card.has-warn { border-color: rgba(245,158,11,.4); }
.dc-head { display: flex; align-items: center; gap: 9px; margin-bottom: 2px; }
.status-dot { width: 9px; height: 9px; border-radius: 50%; flex: none; }
.status-dot.online { background: var(--ok); box-shadow: 0 0 8px rgba(16,185,129,.7); }
.status-dot.offline { background: var(--crit); box-shadow: 0 0 8px rgba(239,68,68,.7); }
.status-dot.offline-ok { background: var(--offline); }
.status-dot.never { background: transparent; border: 2px dashed var(--dim); width: 7px; height: 7px; }
.dc-host { font-weight: 650; font-size: 15px; font-family: var(--mono); }
.dc-badges { margin-left: auto; display: flex; gap: 5px; }
.pill {
  font-size: 10.5px; font-weight: 600; padding: 2px 8px; border-radius: 999px;
  background: var(--bg2); color: var(--muted); border: 1px solid var(--border);
  text-transform: uppercase; letter-spacing: .04em; white-space: nowrap;
}
.pill.p-edge { color: #7dd3fc; border-color: #164e63; }
.pill.p-monitor { color: #86efac; border-color: #14532d; }
.pill.p-both { color: #fcd34d; border-color: #713f12; }
.pill.p-dev { color: var(--purple); border-color: #4c1d95; }
.pill.p-gateway { color: #f0abfc; border-color: #701a75; }
.pill.p-crit { color: #fff; background: var(--crit); border-color: var(--crit); }
.pill.p-warn { color: #111; background: var(--warn); border-color: var(--warn); }
.dc-sub { color: var(--dim); font-size: 12px; margin-bottom: 10px; }
.dc-metrics { display: grid; grid-template-columns: repeat(4, 1fr); gap: 8px 10px; }
.m { min-width: 0; }
.m .l { font-size: 10.5px; color: var(--dim); text-transform: uppercase; letter-spacing: .04em; }
.m .v { font-family: var(--mono); font-size: 14px; font-weight: 600; white-space: nowrap; }
.m .v small { font-size: 11px; color: var(--muted); font-weight: 400; }
.v.ok { color: var(--ok); } .v.warn { color: var(--warn); } .v.crit { color: var(--crit); }
.sparkline { margin-top: 10px; height: 34px; width: 100%; }
.dc-foot { display: flex; justify-content: space-between; margin-top: 8px; font-size: 11.5px; color: var(--dim); }

/* tunnels on gateway card */
.tunnel-grid { display: flex; flex-wrap: wrap; gap: 6px; margin-top: 10px; }
.tunnel {
  font-family: var(--mono); font-size: 12px; padding: 3px 9px; border-radius: 6px;
  background: var(--bg2); border: 1px solid var(--border);
}
.tunnel.up { color: var(--ok); }
.tunnel.down { color: var(--crit); border-color: rgba(239,68,68,.4); }
.tunnel.clog { color: var(--warn); border-color: rgba(245,158,11,.4); }

/* ---------- detail ---------- */
.detail-head { display: flex; align-items: center; gap: 14px; flex-wrap: wrap; margin-bottom: 6px; }
.back { color: var(--muted); text-decoration: none; font-size: 22px; line-height: 1; }
.back:hover { color: var(--text); }
.meta-chips { display: flex; gap: 6px; flex-wrap: wrap; margin: 8px 0 16px; }
.range-bar { display: flex; gap: 4px; margin: 14px 0; align-items: center; flex-wrap: wrap; }
.range-btn {
  background: var(--card); border: 1px solid var(--border); color: var(--muted);
  padding: 5px 13px; border-radius: 8px; cursor: pointer; font-size: 13px; font-weight: 500;
}
.range-btn:hover { color: var(--text); }
.range-btn.active { background: var(--accent); color: #06202e; border-color: var(--accent); font-weight: 600; }
.charts-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(430px, 1fr)); gap: 14px; }
.chart-card { padding: 10px 8px 2px; }
.chart-title { font-size: 12.5px; font-weight: 600; color: var(--muted); padding: 2px 10px 4px; text-transform: uppercase; letter-spacing: .05em; }
.chart-box { width: 100%; height: 240px; }
.chart-box.tall { height: 420px; }

table { width: 100%; border-collapse: collapse; font-size: 13px; }
th { text-align: left; color: var(--dim); font-weight: 600; font-size: 11.5px; text-transform: uppercase; letter-spacing: .05em; padding: 8px 10px; border-bottom: 1px solid var(--border); }
td { padding: 8px 10px; border-bottom: 1px solid var(--border); vertical-align: top; }
tr:last-child td { border-bottom: none; }
tr.row-crit td:first-child { box-shadow: inset 3px 0 0 var(--crit); }
tr.row-warn td:first-child { box-shadow: inset 3px 0 0 var(--warn); }
.sev-tag { font-size: 10.5px; font-weight: 700; padding: 2px 8px; border-radius: 5px; letter-spacing: .05em; }
.sev-tag.critical { background: rgba(239,68,68,.15); color: var(--crit); }
.sev-tag.warning { background: rgba(245,158,11,.13); color: var(--warn); }
.sev-tag.info { background: rgba(56,189,248,.13); color: var(--accent); }
.st-open { color: var(--crit); font-weight: 600; }
.st-resolved { color: var(--ok); }

/* compare + filters */
.controls { display: flex; gap: 10px; align-items: center; flex-wrap: wrap; margin: 12px 0 16px; }
.controls select { width: auto; min-width: 210px; }
.dev-checks { display: flex; gap: 6px; flex-wrap: wrap; }
.dev-check {
  font-family: var(--mono); font-size: 12.5px; padding: 5px 11px; border-radius: 8px;
  background: var(--card); border: 1px solid var(--border); color: var(--muted); cursor: pointer; user-select: none;
}
.dev-check.sel { background: rgba(56,189,248,.12); border-color: var(--accent); color: var(--accent); }
.filter-chip { composes: dev-check; }

.kv { display: grid; grid-template-columns: 170px 1fr; gap: 4px 14px; font-size: 13px; }
.kv .k { color: var(--dim); }
pre.raw {
  background: var(--bg2); border: 1px solid var(--border); border-radius: 10px;
  padding: 14px; font-size: 12px; overflow-x: auto; font-family: var(--mono); color: #a5b4c8;
}
.empty { color: var(--dim); text-align: center; padding: 44px 0; font-size: 14px; }

.toast {
  position: fixed; bottom: 24px; right: 24px; z-index: 100;
  background: var(--card2); border: 1px solid var(--border2); color: var(--text);
  border-radius: 10px; padding: 12px 18px; font-size: 13px; box-shadow: 0 8px 30px rgba(0,0,0,.5);
}
.err-banner {
  background: rgba(239,68,68,.1); border: 1px solid rgba(239,68,68,.4);
  border-radius: 10px; padding: 10px 14px; margin-bottom: 14px; font-size: 13px;
}

@media (max-width: 900px) {
  .fleet-chips { display: none; }
  .grid { grid-template-columns: 1fr; }
  .charts-grid { grid-template-columns: 1fr; }
}