.wrapper-under-line(@height: 45pt, @bg: extract(@CLR_1, 9), @border-bg: extract(@CLR_1, 7)) { 
    display: flex;
    width: 100%;
    height: @height;
    background-color: @bg; 
    cursor: pointer; 
    border-bottom: 0.7px solid @border-bg; 
}

.wrapper-page-left(@width: 20.62%, @bg: extract(@CLR_1, 9)) {
    .no-select;
    display: block;
    position: absolute;
    height: 100%;
    width: @width;
    background-color: @bg; 
    border-right: 0.7px solid extract(@CLR_1, 6);
    box-shadow: 2px 0px 6px extract(@CLR_1, 6);     
}

.wrapper-page-right(@width: 79.28%, @left: 20.7%) { 
    display: block;
    position: absolute;
    left: @left;
    height: 100%;
    width: @width;
}