$root
#{$root}

<style>
    .grid {
        display: grid;
        width: 100%;
        height: 30vw;
        background: grey;
        justify-content: center;
        align-content: center;
    }

    #element {
        width: 100px;
        height: 100px;
        background: gold;
        position: relative;
        left: -25%;
    }
</style>
<div class="grid">
    <div id="element">1</div>
</div>
<script>
    console.log(getComputedStyle(document.getElementById('element')).left);
</script>