:root {
  --bg: #0f1419;
  --panel: #1a2028;
  --panel2: #232c38;
  --border: #2d3a4a;
  --text: #e4e9f0;
  --muted: #8a98a8;
  --accent: #3b82f6;
  --accent2: #60a5fa;
  --green: #22c55e;
  --red: #ef4444;
  --amber: #f59e0b;
  --radius: 8px;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.5;
}

a { color: var(--accent2); text-decoration: none; }
a:hover { text-decoration: underline; }

header.topbar {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 12px 20px;
  background: var(--panel);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 1000;
}
header.topbar .brand {
  font-weight: 700;
  font-size: 18px;
  letter-spacing: 0.5px;
}
header.topbar nav { display: flex; gap: 14px; }
header.topbar nav a { color: var(--muted); font-size: 14px; }
header.topbar nav a.active, header.topbar nav a:hover { color: var(--text); text-decoration: none; }
header.topbar .spacer { flex: 1; }
header.topbar .status { font-size: 13px; color: var(--muted); }

main { padding: 20px; max-width: 1400px; margin: 0 auto; }

h1 { margin: 0 0 16px 0; font-size: 22px; }
h2 { margin: 24px 0 12px 0; font-size: 17px; color: var(--muted); font-weight: 600; }

.card {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 16px;
  margin-bottom: 16px;
}

.grid { display: grid; gap: 16px; }
.grid-2 { grid-template-columns: 1fr 1fr; }
.grid-3 { grid-template-columns: 1fr 1fr 1fr; }
/* Grid items must not force the page wider than the viewport.
   min-width:0 lets long content (logs, raw frames) wrap/scroll inside
   the card instead of stretching the grid column. */
.grid > * { min-width: 0; }
@media (max-width: 900px) { .grid-2, .grid-3 { grid-template-columns: 1fr; } }

table { width: 100%; border-collapse: collapse; font-size: 13px; }
th, td { text-align: left; padding: 8px 10px; border-bottom: 1px solid var(--border); }
th { color: var(--muted); font-weight: 600; font-size: 12px; text-transform: uppercase; letter-spacing: 0.5px; }
tr:hover td { background: var(--panel2); }

input, select, textarea {
  background: var(--panel2);
  border: 1px solid var(--border);
  color: var(--text);
  border-radius: 6px;
  padding: 8px 10px;
  font-size: 14px;
  font-family: inherit;
  width: 100%;
}
input:focus, select:focus, textarea:focus { outline: none; border-color: var(--accent); }

label { display: block; font-size: 13px; color: var(--muted); margin-bottom: 4px; }
.field { margin-bottom: 12px; }

button, .btn {
  background: var(--accent);
  color: white;
  border: none;
  border-radius: 6px;
  padding: 8px 16px;
  font-size: 14px;
  cursor: pointer;
  font-family: inherit;
}
button:hover, .btn:hover { background: var(--accent2); }
button.secondary, .btn.secondary { background: var(--panel2); border: 1px solid var(--border); }
button.secondary:hover, .btn.secondary:hover { background: var(--border); }
button:disabled { opacity: 0.5; cursor: not-allowed; }

.row { display: flex; gap: 10px; align-items: center; }
.row > * { flex: 1; }
.row .shrink { flex: 0 0 auto; }

.badge {
  display: inline-block;
  padding: 2px 8px;
  border-radius: 12px;
  font-size: 11px;
  font-weight: 600;
}
.badge.online { background: rgba(34,197,94,0.2); color: var(--green); }
.badge.offline { background: rgba(239,68,68,0.15); color: var(--red); }

#map { height: 60vh; border-radius: var(--radius); border: 1px solid var(--border); }

.muted { color: var(--muted); }
.small { font-size: 12px; }
.mono { font-family: "SF Mono", Consolas, "Liberation Mono", monospace; font-size: 12px; }
.tag { display: inline-block; background: var(--panel2); border: 1px solid var(--border); border-radius: 4px; padding: 1px 6px; font-size: 11px; margin: 1px; }

/* Alarm tags — red for AL alarm frames, amber for state-flag warnings */
.tag.alarm-al { background: rgba(239,68,68,0.25); color: var(--red); border-color: rgba(239,68,68,0.5); font-weight: 600; }
.tag.alarm-flag { background: rgba(245,158,11,0.2); color: var(--amber); border-color: rgba(245,158,11,0.5); }

.toast {
  position: fixed;
  bottom: 20px;
  right: 20px;
  background: var(--panel2);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 12px 16px;
  z-index: 2000;
  max-width: 360px;
  box-shadow: 0 8px 24px rgba(0,0,0,0.4);
}
.toast.error { border-color: var(--red); }
.toast.ok { border-color: var(--green); }

pre { background: var(--bg); border: 1px solid var(--border); border-radius: 6px; padding: 10px; overflow-x: auto; font-size: 12px; }

.empty { color: var(--muted); font-style: italic; padding: 20px; text-align: center; }

/* Log box: scroll internally, wrap long raw frames so the page never overflows. */
.logbox {
  max-height: 30vh;
  overflow: auto;
  white-space: pre-wrap;
  word-break: break-all;
  overflow-wrap: anywhere;
}
.logbox > div {
  padding: 2px 0;
  border-bottom: 1px solid var(--border);
  white-space: pre-wrap;
  word-break: break-all;
  overflow-wrap: anywhere;
}

/* Danger buttons (delete/reset) — red-tinted to signal destructive action. */
button.danger, .btn.danger {
  background: rgba(239,68,68,0.15);
  border: 1px solid rgba(239,68,68,0.5);
  color: var(--red);
}
button.danger:hover, .btn.danger:hover {
  background: rgba(239,68,68,0.3);
}

/* Quick action buttons — compact icon+label row. */
.quick-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}
.quick-action {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
  background: var(--panel2);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 10px 16px;
  min-width: 90px;
  cursor: pointer;
  font-family: inherit;
  font-size: 12px;
  color: var(--text);
}
.quick-action:hover {
  background: var(--border);
  border-color: var(--accent);
}
.quick-action .qa-icon { font-size: 22px; }
.quick-action .qa-label { color: var(--muted); }

/* Fix-freshness badges. */
.badge.fix-fresh { background: rgba(34,197,94,0.2); color: var(--green); }
.badge.fix-stale { background: rgba(245,158,11,0.2); color: var(--amber); }
.badge.fix-old   { background: rgba(239,68,68,0.15); color: var(--red); }
.badge.fix-none  { background: var(--panel2); color: var(--muted); }