.left-sidebar{position:fixed;top:60px;left:0;width:240px;height:calc(100% - 60px);background-color:#1e1e2f;color:#fff;font-family:sans-serif;padding:10px;overflow-y:auto;border-right:1px solid #333;z-index:20}.left-sidebar-header{font-weight:700;font-size:16px;margin-bottom:12px;padding-left:5px}.folder{margin-bottom:10px}.folder-title{font-weight:700;cursor:pointer;padding:5px;transition:background .2s}.folder-title:hover{background:#2a2a3d}.file-list{list-style:none;margin:0;padding-left:20px;display:none}.file-list.open{display:block}.file-list li{cursor:pointer;padding:4px 0;transition:color .2s}.file-list li:hover{color:#4fc3f7}.file-list li.active{color:#4fc3f7;font-weight:700}