.viewport {
  flex: 1;
  position: relative;
  overflow: hidden;
  background: #0d0d1a;
}

.viewport canvas {
  display: block;
  width: 100% !important;
  height: 100% !important;
}

/* ── Floating gizmo toolbar ─────────────────────────────────── */
.gizmo-toolbar {
  position: absolute;
  top: 10px;
  left: 10px;
  z-index: 10;
  display: flex;
  gap: 4px;
  background: #0d0d22cc;
  backdrop-filter: blur(8px);
  border: 1px solid #2a2a4a;
  border-radius: 8px;
  padding: 5px;
}

.gizmo-btn {
  display: flex;
  align-items: center;
  gap: 5px;
  padding: 5px 10px;
  border-radius: 5px;
  border: 1px solid transparent;
  background: transparent;
  color: #666688;
  cursor: pointer;
  font-family: 'JetBrains Mono', monospace;
  font-size: 9px;
  font-weight: 700;
  letter-spacing: 1px;
  transition: all 0.15s;
}
.gizmo-btn:hover        { color: #aaaacc; background: #1e1e3a; }
.gizmo-btn.active       { background: #1e1e4a; border-color: #5555cc; color: #aaaaff; }
.gizmo-icon             { font-size: 14px; }
.gizmo-key {
  font-size: 8px;
  color: #444466;
  background: #111128;
  padding: 1px 4px;
  border-radius: 2px;
  border: 1px solid #2a2a4a;
}