html, body {
  height: 100%;
  margin: 0;
  padding: 0;
  font-family: sans-serif;
}

#map {
  position: absolute;
  top: 0;
  bottom: 0;
  left: 250px; /* فضای sidebar */
  right: 0;
}

#sidebar {
  position: absolute;
  top: 0;
  left: 0;
  bottom: 0;
  width: 250px;
  background: rgba(248, 249, 250, 1);
  border-right: 1px solid #ddd;
  padding: 10px;
  overflow: auto;
}

.category {
  font-weight: bold;
  margin-top: 15px;
  cursor: pointer;
}

.layer {
  margin-left: 15px;
  cursor: pointer;
  margin-top: 5px;
}

.layer:hover {
  text-decoration: underline;
}