* {
  -moz-box-sizing: border-box;
  box-sizing: border-box;
}

label[for] { cursor: pointer; }
        
@supports (display: grid) {
.grid {display: grid;
  grid-template-columns: repeat(auto-fit, minmax(175px, 1fr));
  grid-auto-flow:dense;
  grid-gap: 15px;
  margin:0;
}
.grid-h {grid-auto-rows: 150px;}
.grid-v {grid-auto-rows: 300px;}
.grid-item {display: flex;align-items: center;justify-content: center}
}
@supports not (display: grid) {

.grid {
  width: 100%;
  position: fixed;
  top: 0;
  left: 0;
  height: 100%;
  z-index: 0;
  display: -webkit-flex;
  display: -ms-flexbox;
  display: flex;
  -webkit-flex-wrap: wrap;
  -ms-flex-wrap: wrap;
  flex-wrap: wrap;
  -webkit-align-items: flex-start;
  -ms-flex-align: start;
  align-items: flex-start;
  -webkit-align-content: flex-start;
  -ms-flex-line-pack: start;
  align-content: flex-start;
  padding: 16px;
  overflow: auto;
  text-align: center;
  -webkit-transition: opacity .33s;
  transition: opacity .33s;
}

.grid .grid-item {
  width: 25%;
  display: inline-block;
  padding: 16px;
  opacity: .75;
  -webkit-transition: opacity .5s;
  transition: opacity .5s;
}
        }

.grid .grid-item:hover { opacity: 1; }

@media screen and (max-width: 1024px) {

.grid .grid-item { width: 50%; }

}

@media screen and (max-width: 480px) {

.grid .grid-item { width: 100%; }

}

.grid img {
  max-width: 100%;
  max-height: 100%;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.25);
}
        input[type="checkbox"] { display: none; }

.lightbox {
  width: 100%;
  position: fixed;
  top: 0;
  left: 0;
  min-height: 100%;
  z-index: 9999;
  background: #000C;
  overflow: auto;
  -webkit-transform: scale(0);
  -ms-transform: scale(0);
  transform: scale(0);
  -webkit-transition: -webkit-transform .25s ease-out;
  transition: transform .25s ease-out;
}

.lightbox img {
  position: fixed;
  top: 50%;
  left: 50%;
  -webkit-transform: translate(-50%, -50%);
  -ms-transform: translate(-50%, -50%);
  transform: translate(-50%, -50%);
  width: auto;
  max-height: 96%;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.25);
}

input[type="checkbox"]:checked + .lightbox {
  -webkit-transform: scale(1);
  -ms-transform: scale(1);
  transform: scale(1);
}

input[type="checkbox"]:checked ~ .grid { opacity: 1; }