collapse

.mod-left-split .workspace-tab-header-inner,
.mod-right-split .workspace-tab-header-inner {
    visibility: hidden;
    opacity: 0;
    transition: opacity 0.2s ease-in-out, visibility 0.2s ease-in-out;
}
 
.mod-left-split .workspace-tab-header-container,
.mod-right-split .workspace-tab-header-container {
    height: 15px;
    flex-shrink: 0;
    background-color: transparent;
    transition: height 0.2s ease-in-out, background-color 0.2s ease-in-out;
}
 
.mod-left-split .workspace-tab-header-container:hover,
.mod-right-split .workspace-tab-header-container:hover {
    height: 40px; /* Expands on hover */
    background-color: rgba(0, 0, 0, 0.2); /* Visible background */
}
 
.mod-left-split .workspace-tab-header-container:hover .workspace-tab-header-inner,
.mod-right-split .workspace-tab-header-container:hover .workspace-tab-header-inner {
    visibility: visible;
    opacity: 1;
}