Largest Contentful Paint element

[learningdesign]

How to fix this code can some one please help me 

<div class="line-child" style="display: block; text-align: center; position: relative; translate: none;">

i have added this code in product-grid.css but it did not solve the issue

.line-child {

display: flex;

justify-content: center;

align-items: center;

text-align: center;

position: relative;

}