LeftRibbonExtended.css

/* > Darken the Expanded Ribbon*/
.workspace-split.mod-horizontal.mod-left-split{
    background-color: var(--bg2);
}

.workspace-split.mod-horizontal.mod-left-split .workspace-tabs{
    background-color: hsl( 
        var(--base-h), 
        calc(var(--base-s) + 100%), 
        calc(var(--base-l) - 10%) );
    border-radius: 8px 0 0 16px;
}

/* > Adds Highlight under Icon */
.workspace-split .workspace-tab-header-container .is-active > div::after {
    /* border-bottom: solid white 1px; */
    width: 26px;
    /* margin-left: 3px; */
    position: absolute;
    top: 33px;
    height: 5px;
    background-color: rgba(255, 255, 255, 0.158);
    border-radius: 100px;
    content: "";
}

/* Left RIbbon Expanded Horizontal Divider Tweak*/
/* > Remove Border between tabs and content */
.workspace-sidedock-empty-state
    + .workspace-tabs
    .workspace-tab-header-container {
    border: none;
}

/* > DRAGGABLE HORIZONTAL Divider between Tabs */
/* Left RIbbon Expanded Horizontal Divider Tweak*/
.workspace-split.mod-horizontal>*>.workspace-leaf-resize-handle{
    position:absolute;
    bottom: -8px;
    order: 2;
    flex-grow: 0;
    flex-basis: 0px;
    padding: 8px 0 ;
    border-bottom: none;
}
.workspace-split.mod-horizontal>*>.workspace-leaf-resize-handle::after{
    position:absolute;
    background-color:var(--background-divider);
    width: 100%;
    content: " ";
    height: 4px;
    top: 30%;
    transition: background-color 200ms;
}
.workspace-split.mod-horizontal>*>.workspace-leaf-resize-handle:hover::after{
    background-color:hsla( var(--accent-h), var(--accent-s), var(--accent-l) , 0.6);
}
.workspace-split.mod-horizontal>*>.workspace-leaf-resize-handle:active::after{
    background-color:var(--background-modifier-border-focus);
}

/* > Tweak Collapse Icon in BACKLINK */
.tree-item-icon.collapse-icon {
    display: unset !important;
}
.backlink-pane > .tree-item-self,
.backlink-pane > .tree-item-self:hover,
.outgoing-link-pane > .tree-item-self,
.outgoing-link-pane > .tree-item-self {
    padding-left: 24px;
}


/* > Header in VIEW CONTENT */
/* Put it to bottom */
.workspace-split.mod-horizontal.mod-left-split .workspace-leaf-content .nav-header {
    order: 2;
}

.workspace-tabs .workspace-leaf{
    /* outline: white 1px solid; */
    padding-top: 4px;
}

/* > REMOVE GRADIENT */
body:not(.is-translucent):not(.is-mobile) .mod-left-split .backlink-pane, body:not(.is-translucent):not(.is-mobile) .mod-left-split .item-list, body:not(.is-translucent):not(.is-mobile) .mod-left-split .nav-files-container, body:not(.is-translucent):not(.is-mobile) .mod-left-split .outgoing-link-pane, body:not(.is-translucent):not(.is-mobile) .mod-left-split .tag-container, body:not(.is-translucent):not(.is-mobile) .mod-left-split .workspace-leaf-content[data-type=search] .search-result-container{
    padding-top: 8px;
    background: none;
}