:root {
  --bg: #0d0f12;
  --panel: #14171c;
  --line: #23272e;
  --text: #e7e9ec;
  --muted: #8b929c;
  --accent: #4da3ff;
  --ok: #3ddc84;
  --off: #ff6b7a;
  /* Posição que veio do buffer do equipamento, e não em tempo real. */
  --buffer: #f0a14b;
  color-scheme: dark;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  height: 100vh;
  display: flex;
  flex-direction: column;
  background: var(--bg);
  color: var(--text);
  font: 14px/1.5 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}

/* --- cabeçalho --- */
header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
  padding: 12px 18px;
  background: var(--panel);
  border-bottom: 1px solid var(--line);
  z-index: 500;
}

.brand { display: flex; align-items: center; gap: 12px; }
.brand strong { display: block; font-size: 15px; }
.brand small { color: var(--muted); font-size: 12px; }

.dot {
  width: 10px; height: 10px; border-radius: 50%;
  background: var(--off); flex: none;
  transition: background .2s, box-shadow .2s;
}
.dot.online { background: var(--ok); box-shadow: 0 0 0 4px rgba(61, 220, 132, .15); }
.dot.pending { background: #f5c451; }

.connect { display: flex; gap: 8px; }
.connect input {
  width: min(46vw, 340px);
  padding: 9px 12px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #0f1216;
  color: inherit;
  font: inherit;
}
.connect input:focus { outline: none; border-color: var(--accent); }
.connect button {
  padding: 9px 18px;
  border: 0; border-radius: 8px;
  background: var(--accent); color: #04121f;
  font: inherit; font-weight: 600; cursor: pointer;
}
.connect button:hover { filter: brightness(1.1); }
.connect button.disconnect { background: var(--off); color: #2a0508; }

/* --- corpo --- */
main { flex: 1; display: flex; min-height: 0; }
#map { flex: 1; background: #0b0d10; }

/* Mapa claro do OSM harmonizado com o tema escuro. */
.leaflet-tile-container { filter: invert(1) hue-rotate(180deg) brightness(.92) contrast(.9); }
.leaflet-container { background: #0b0d10; }
.leaflet-bar a, .leaflet-control-attribution {
  background: var(--panel) !important; color: var(--muted) !important; border-color: var(--line) !important;
}
.leaflet-control-attribution a { color: var(--accent) !important; }

/* --- marcador --- */
.bus-marker { background: none; border: 0; }
.bus-dot {
  width: 16px; height: 16px; border-radius: 50%;
  border: 2px solid #fff;
  box-shadow: 0 2px 6px rgba(0, 0, 0, .6);
}
.bus-pulse {
  position: absolute; inset: -7px;
  border-radius: 50%;
  animation: pulse 2s ease-out infinite;
}
@keyframes pulse {
  0%   { transform: scale(.6); opacity: .7; }
  100% { transform: scale(1.6); opacity: 0; }
}
.bus-marker.stale .bus-pulse { display: none; }
.bus-marker.stale .bus-dot { opacity: .45; border-color: #94a0ae; }
/* Última posição veio do buffer: o veículo não está necessariamente aqui agora. */
.bus-marker.buffered .bus-pulse { display: none; }
.bus-marker.buffered .bus-dot { border-color: var(--buffer); border-style: dashed; }

/* --- lista --- */
#sidebar {
  width: 320px; flex: none;
  display: flex; flex-direction: column;
  background: var(--panel);
  border-left: 1px solid var(--line);
}
.sidebar-head {
  display: flex; align-items: center; justify-content: space-between;
  padding: 14px 16px; border-bottom: 1px solid var(--line);
}
.sidebar-head h2 { margin: 0; font-size: 13px; text-transform: uppercase; letter-spacing: .08em; color: var(--muted); }
.counter { font-size: 12px; color: var(--muted); background: #0f1216; padding: 2px 9px; border-radius: 999px; }

#list { overflow-y: auto; padding: 10px; }
#list.empty { padding: 40px 20px; text-align: center; color: var(--muted); font-size: 13px; }

.bus {
  padding: 11px 12px; margin-bottom: 8px;
  border: 1px solid var(--line); border-left: 3px solid var(--line);
  border-radius: 8px; background: #0f1216; cursor: pointer;
}
.bus:hover { border-color: #2f3540; }
.bus.tracking { border-left-color: var(--ok); }
.bus.idle { opacity: .6; }

.bus-head { display: flex; align-items: baseline; justify-content: space-between; gap: 8px; }
.bus-head strong { font-size: 14px; }
.bus-head span { font-size: 11px; color: var(--muted); }
.bus-sub { color: var(--muted); font-size: 12px; margin-top: 2px; }
.bus-stats { display: flex; gap: 14px; margin-top: 8px; font-size: 12px; }
.bus-stats b { color: var(--text); font-weight: 600; }
.bus-stats span { color: var(--muted); }
.bus-stats .backlog { color: var(--buffer); }

@media (max-width: 820px) {
  #sidebar { display: none; }
  .connect input { width: 100%; }
  .connect { flex: 1 1 100%; }
}