:root {
  --bg: #f5f8fb;
  --panel: #ffffff;
  --ink: #0b1f33;
  --muted: #516173;
  --line: #d2d9e2;
  --ok: #16a34a;
  --warn: #f59e0b;
  --off: #94a3b8;
  --router: #0ea5e9;
  --switch: #f97316;
  --ap: #22c55e;
  --client: #6366f1;
  --domain: #64748b;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: "IBM Plex Sans", "Segoe UI", sans-serif;
  color: var(--ink);
  background: radial-gradient(circle at top right, #eaf4ff, var(--bg) 55%);
}

header {
  display: flex;
  justify-content: space-between;
  align-items: end;
  gap: 1rem;
  padding: 1.2rem 1.4rem;
  border-bottom: 1px solid var(--line);
}

h1 {
  margin: 0;
  font-size: 1.35rem;
}

p {
  margin: 0.25rem 0 0;
  color: var(--muted);
}

.meta {
  color: var(--muted);
  font-size: 0.9rem;
}

main {
  display: grid;
  gap: 1rem;
  padding: 1rem;
  grid-template-columns: 2fr 1.2fr;
  grid-template-areas:
    "graph devices"
    "graph events";
}

.panel {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 12px;
  box-shadow: 0 6px 18px rgba(15, 23, 42, 0.06);
  padding: 0.8rem;
}

.graph-panel {
  grid-area: graph;
}

.devices-panel {
  grid-area: devices;
}

.events-panel {
  grid-area: events;
}

.panel h2 {
  margin: 0.2rem 0 0.6rem;
  font-size: 1rem;
}

.panel-title-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

button {
  border: 1px solid var(--line);
  background: #f8fafc;
  border-radius: 8px;
  padding: 0.35rem 0.6rem;
  cursor: pointer;
}

#graph {
  width: 100%;
  height: 640px;
  border: 1px dashed var(--line);
  border-radius: 10px;
  background: linear-gradient(180deg, #ffffff 0%, #f8fbff 100%);
}

.table-wrap {
  max-height: 310px;
  overflow: auto;
}

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.9rem;
}

th,
td {
  text-align: left;
  border-bottom: 1px solid var(--line);
  padding: 0.35rem;
}

.status-pill {
  display: inline-block;
  border-radius: 999px;
  padding: 0.15rem 0.55rem;
  font-size: 0.78rem;
  color: #fff;
}

.status-online {
  background: var(--ok);
}

.status-offline {
  background: var(--off);
}

#eventList {
  list-style: none;
  margin: 0;
  padding: 0;
  max-height: 260px;
  overflow: auto;
  font-size: 0.9rem;
}

#eventList li {
  border-bottom: 1px solid var(--line);
  padding: 0.42rem 0;
  color: var(--muted);
}

.node-label {
  font-size: 12px;
  font-weight: 600;
  fill: #0f172a;
}

.node {
  stroke: #1e293b;
  stroke-width: 1.2;
}

.edge {
  stroke: #94a3b8;
  stroke-width: 1.2;
}

.edge-dns {
  stroke-dasharray: 4 3;
  opacity: 0.65;
}

@media (max-width: 1200px) {
  main {
    grid-template-columns: 1fr;
    grid-template-areas:
      "graph"
      "devices"
      "events";
  }

  #graph {
    height: 520px;
  }
}