Basic Vertical Menu

.vertical-menu {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  list-style: none;
  padding: 0;
  margin: 0;
}

.vertical-menu li a {
  display: block;
  padding: 0.75rem 1rem;
  color: var(--color-gray-700);
  text-decoration: none;
  border-radius: var(--radius);
  transition: all 0.2s ease;
}

.vertical-menu li.active a {
  background: var(--color-primary-50);
  color: var(--color-primary-700);
}

.vertical-menu li a:hover {
  background: var(--color-gray-100);
}

Nested Vertical Menu

.vertical-menu.nested .submenu {
  margin-left: 1rem;
  border-left: 2px solid var(--color-gray-200);
  padding-left: 1rem;
  margin-top: 0.5rem;
}

.vertical-menu.nested .has-submenu > a {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.vertical-menu.nested .has-submenu > a::after {
  content: '▼';
  font-size: 0.75rem;
  transition: transform 0.2s ease;
}

.vertical-menu.nested .has-submenu.active > a::after {
  transform: rotate(180deg);
}

Menu with Icons

.vertical-menu.with-icons a {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.vertical-menu.with-icons .icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 24px;
  height: 24px;
  flex-shrink: 0;
}

.vertical-menu.with-icons li.active a {
  background: var(--color-primary-50);
  color: var(--color-primary-700);
  font-weight: 500;
}