.sidebar {
  width: 250px;
  left: 0;
  top: 0;
  height: 100%;
  padding: 20px;
}

.category-list {
  list-style: none;
  padding: 0;
  margin: 0;
}

.category-list li {
  position: relative;
  margin: 5px 0;
}

.category-list a {
  text-decoration: none;
  display: block;
  padding: 10px;
  border-radius: 4px;
}

.category-list a:hover {
}

/* Second-level sub-menu */
.sub-menu {
  display: none;
  position: absolute;
  top: 0;
  left: 50%;
  width: 240px;
  background-color: #f1f1f1;
  padding: 3px;
  border: 1px solid #ccc;
  z-index: 1003;
  border-radius: 4px;
}

/* Sub-category links inside the sub-menu */
.sub-categories a {
  display: block;
  color: #333;
  text-decoration: none;
}

.sub-categories a:hover {
  color: #007bff;
}

/* Ensure sub-menu appears on hover */
.category-list li:hover > .sub-menu {
  display: block;
}