:root {
  --panel: rgba(10, 14, 18, 0.82);
  --panel-solid: rgba(10, 14, 18, 0.95);
  --border: rgba(255, 255, 255, 0.08);
  --accent: #35e0ff;
  --text: #d6e2ea;
  --dim: #7c8b97;
  --ok: #46e08a;
  --warn: #ffcf50;
  --err: #ff5964;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  height: 100%;
  overflow: hidden;
  background: #05080b;
  color: var(--text);
  font-family: ui-monospace, "SF Mono", "Cascadia Code", Menlo, Consolas, monospace;
}

#cesiumContainer {
  position: absolute;
  inset: 0;
}

/* ---- HUD ---- */
#hud {
  position: absolute;
  top: 14px;
  left: 14px;
  width: 288px;
  max-height: calc(100vh - 28px);
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: 14px;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 12px;
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  z-index: 10;
  font-size: 12px;
  box-shadow: 0 8px 40px rgba(0, 0, 0, 0.5);
}

#hud header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
}

.brand {
  font-weight: 700;
  letter-spacing: 0.5px;
  font-size: 14px;
  color: #fff;
}
.brand span {
  color: var(--accent);
  font-weight: 500;
  font-size: 11px;
}

#live-chip {
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.5px;
  padding: 3px 8px;
  border-radius: 999px;
  white-space: nowrap;
  border: 1px solid transparent;
}
#live-chip[data-state="live"] {
  color: var(--ok);
  border-color: rgba(70, 224, 138, 0.4);
  background: rgba(70, 224, 138, 0.1);
}
#live-chip[data-state="scrub"] {
  color: var(--warn);
  border-color: rgba(255, 207, 80, 0.4);
  background: rgba(255, 207, 80, 0.1);
  font-size: 9px;
}

.modes {
  display: flex;
  gap: 6px;
}
.modes button {
  flex: 1;
  padding: 6px 8px;
  font: inherit;
  font-size: 11px;
  color: var(--dim);
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--border);
  border-radius: 8px;
  cursor: pointer;
  transition: all 0.15s;
}
.modes button:hover { color: var(--text); }
.modes button.active {
  color: #04121a;
  background: var(--accent);
  border-color: var(--accent);
  font-weight: 700;
}

/* ---- layer rows ---- */
#layers {
  display: flex;
  flex-direction: column;
  gap: 1px;
  overflow-y: auto;
}

/* ---- collapsible category sections ---- */
.cat:has(.cat-body:empty) { display: none; } /* hide unused categories */
.cat-header {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 4px 4px 3px;
  margin-top: 4px;
  cursor: pointer;
  user-select: none;
  color: var(--dim);
  font-size: 9.5px;
  letter-spacing: 0.6px;
  text-transform: uppercase;
  border-top: 1px solid var(--border);
}
.cat-header:hover { color: var(--text); }
.cat-chevron { font-size: 8px; width: 8px; transition: transform 0.15s; }
.cat.collapsed .cat-chevron { transform: rotate(-90deg); }
.cat.collapsed .cat-body { display: none; }
.cat-body { display: flex; flex-direction: column; gap: 1px; }

.layer-row {
  padding: 5px 4px;
  border-radius: 6px;
}
.layer-row:hover { background: rgba(255, 255, 255, 0.03); }
.layer-row label {
  display: flex;
  align-items: center;
  gap: 7px;
  cursor: pointer;
  user-select: none;
}
.layer-row input[type="checkbox"] {
  accent-color: var(--accent);
  margin: 0;
  cursor: pointer;
}
.layer-row .lname {
  flex: 1;
  color: var(--text);
}
.dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  flex: none;
  background: var(--dim);
  transition: background 0.2s;
}
.dot[data-state="ok"] { background: var(--ok); box-shadow: 0 0 6px rgba(70, 224, 138, 0.6); }
.dot[data-state="warn"] { background: var(--warn); box-shadow: 0 0 6px rgba(255, 207, 80, 0.6); }
.dot[data-state="err"] { background: var(--err); box-shadow: 0 0 6px rgba(255, 89, 100, 0.6); }
.dot[data-state="off"] { background: var(--dim); }
.lstatus {
  padding: 0 0 0 24px;
  color: var(--dim);
  font-size: 10px;
  line-height: 1.3;
  min-height: 0;
}
.lstatus:empty { display: none; }

#hud footer {
  border-top: 1px solid var(--border);
  padding-top: 8px;
  color: var(--dim);
  font-size: 9.5px;
  line-height: 1.4;
}
#hud footer .demo { color: var(--warn); }

/* ---- aircraft pick overlay ---- */
#pick-overlay {
  position: absolute;
  bottom: 130px;
  right: 14px;
  width: 220px;
  padding: 12px 14px;
  background: var(--panel-solid);
  border: 1px solid var(--border);
  border-left: 2px solid var(--accent);
  border-radius: 10px;
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  z-index: 10;
  font-size: 11px;
  box-shadow: 0 8px 40px rgba(0, 0, 0, 0.5);
}
#pick-overlay[hidden] { display: none; }
#pick-overlay .po-title {
  font-weight: 700;
  color: #fff;
  font-size: 13px;
  margin-bottom: 6px;
}
#pick-overlay .po-row {
  display: flex;
  justify-content: space-between;
  gap: 10px;
  padding: 1px 0;
}
#pick-overlay .po-row span:first-child { color: var(--dim); }
#pick-overlay .po-close {
  position: absolute;
  top: 8px;
  right: 10px;
  cursor: pointer;
  color: var(--dim);
  font-size: 14px;
}
#pick-overlay .po-close:hover { color: var(--text); }

/* Keep Cesium's info box on-theme without fighting it */
.cesium-infoBox { font-family: ui-monospace, monospace; }