/*! modernizr 3.5.0 (Custom Build) | MIT *
* https://modernizr.com/download/?-cssgrid_cssgridlegacy-setclasses !*/
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usePrefixes: !0
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e.Modernizr = Modernizr
}(window, document);
.grid {
max-width: 300px;
margin: 0 auto;
}
.item {
position: relative;
display: block;
margin-bottom: 1vw;
background: #ccc;
}
.item:hover {
color: black;
}
.item:after {
content: ' ';
display: block;
width: 100%;
padding-bottom: 100%;
background: #aaa;
}
.item__inner {
position: absolute;
top: 0;
left: 0;
width: 100%;
height: 100%;
font-size: 24px;
color: white;
}
@media (min-width: 600px) {
.grid {
max-width: 1200px;
}
@supports (display: grid) {
.grid {
display: grid;
grid-template-columns: 1fr 1fr 1fr;
grid-column-gap: 1vw;
grid-row-gap: 1vw;
}
}
}
@media (min-width: 600px) and (max-width: 999px) {
.no-cssgrid .item {
float: left;
width: calc(100%/3 - 10px);
margin-right: 10px;
}
.no-cssgrid .item:nth-child(3n) {
margin-right: 0;
}
@supports (display: grid) {
.grid {
display: grid;
grid-template-columns: 1fr 1fr 1fr;
grid-column-gap: 1vw;
grid-row-gap: 1vw;
}
.item {
margin-bottom: 0;
}
.item:nth-child(1) {
grid-column-end: span 2;
}
.item:nth-child(1):after {
display: none;
}
.item:nth-child(3) {
grid-row-end: span 2;
}
.item:nth-child(6) {
grid-column-end: span 2;
}
.item:nth-child(6):after {
padding-bottom: 50%;
}
}
}
@media (min-width: 1000px) {
.no-cssgrid .item {
float: left;
width: calc(100%/4 - 10px);
margin-right: 10px;
}
.no-cssgrid .item:nth-child(4n) {
margin-right: 0;
}
@supports (display: grid) {
.grid {
grid-template-columns: 1fr 1fr 1fr 1fr;
}
.item {
margin-bottom: 0;
}
.item:nth-child(1) {
grid-column-end: span 2;
grid-row-end: span 2;
}
}
}
<div class="grid">
<div class="item">
<div class="item__inner">Item</div>
</div>
<a href="#" class="item">
<div class="item__inner">Item</div>
</a>
<a href="#" class="item">
<div class="item__inner">Item</div>
</a>
<a href="#" class="item">
<div class="item__inner">Item</div>
</a>
<a href="#" class="item">
<div class="item__inner">Item</div>
</a>
<a href="#" class="item">
<div class="item__inner">Item</div>
</a>
<a href="#" class="item">
<div class="item__inner">Item</div>
</a>
<a href="#" class="item">
<div class="item__inner">Item</div>
</a>
<a href="#" class="item">
<div class="item__inner">Item</div>
</a>
</div>
