ドロップダウン

サブメニューのカスタマイズ

                .dropdown-header {
                  display: block;
                  padding: 0.5rem 1.5rem;
                  margin-bottom: 0;
                  font-size: 0.875rem;
                  color: #6c757d;
                  white-space: nowrap;
                }

                .dropdown-divider {
                  height: 0;
                  margin: 0.5rem 0;
                  overflow: hidden;
                  border-top: 1px solid #e9ecef;
                }

                .dropdown-item.active, .dropdown-item:active {
                  color: #fff;
                  text-decoration: none;
                  background-color: #007bff;
                }

                .dropdown-item.disabled, .dropdown-item:disabled {
                  color: #6c757d;
                  background-color: transparent;
                }