add width, height and a border for display the Grid in the filters

[thomas37000]

when we copy the Css code in Codepen for example there is no vue because we don't have a width height and border or background-color so oblige to add them in a new class for all child div

like that for exemple :
.alldiv {
width: 300px;
height: 200px;
border: 1px solid black;
border-radius: 10px;
}

my codepen that i do with you Css Grid Generator
https://codepen.io/thomaschalanson/pen/MWvJZqw