.lcb-editor {
  display: grid;
  grid-template-areas:
    "toolbar toolbar"
    "canvas sidebar";
  grid-template-columns: 3fr 1fr;
  grid-template-rows: auto 1fr;
  height: 90vh;
  border: 1px solid #ddd;
  font-family: sans-serif;
}

.lcb-toolbar {
  grid-area: toolbar;
  background: #f8f8f8;
  border-bottom: 1px solid #ccc;
  padding: 10px;
}

.lcb-canvas {
  grid-area: canvas;
  background: #fff;
  border-right: 1px solid #ccc;
  display: flex;
  align-items: center;
  justify-content: center;
}

.lcb-sidebar {
  grid-area: sidebar;
  background: #fafafa;
  padding: 10px;
  border-left: 1px solid #ccc;
}
.layer-icon {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: transparent;
  border: none;
  cursor: pointer;
  transition: background .12s, color .12s;
  color: #6b7280; /* gris por defecto */
}
.layer-icon:hover { background: rgba(0,0,0,0.04); }
.layer-icon.active { color: #10b981; } /* verde */
.layer-icon.inactive { color: #9ca3af; } /* gris claro */
.layer-icon.danger { color: #ef4444; } /* rojo para eliminar si quieres */