body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;
  background: #f9f9f9;
}

.gg-box {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  grid-auto-rows: 200px;
  grid-gap: 2px;
}

.gg-box img {
  object-fit: cover;
  cursor: pointer;
  width: 100%;
  height: 100%;
  background: rgba(255, 255, 255, 0.02);
}

.gg-box img:hover {
  opacity: 0.98;
}

#gg-screen {
  position: fixed;
  width: 100%;
  height: 100%;
  top: 0;
  left: 0;
  background: rgba(240, 240, 240, 0.9);
  z-index: 9999;
  text-align: center;
}

#gg-screen .gg-image {
  height: 100%;
  display: inline-flex;
  justify-content: center;
  align-items: center;
}

#gg-screen .gg-image img {
  max-width: 100%;
  max-height: 100%;
  margin: 0 auto;
}

.gg-bt {
  width: 35px;
  height: 35px;
  background: #000;
  color: #fff;
  text-align: center;
  line-height: 35px;
  cursor: pointer;
  -moz-transition: all .4s ease;
  -o-transition: all .4s ease;
  -webkit-transition: all .4s ease;
  transition: all .4s ease;
  font-size: 20px;
  box-sizing: border-box;
  padding-left: 2px;
  position: fixed;
  bottom: 10px;
}

.gg-bt:hover {
  background: #222;
}

.gg-close {
  top: 10px;
}

.gg-close,
.gg-next {
  right: 10px;
}

.gg-prev {
  right: 50px;
}

.gg-prev,
.gg-next {
  bottom: 10px;
}

@media (min-width: 478px) {
  .gg-box img:nth-child(3n):not(:last-of-type) {
    grid-row-end: span 2;
  }
}

@media (max-width: 768px) {
  .gg-box {
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    grid-auto-rows: 150px;
  }
}

@media (max-width: 450px) {
  .gg-box {
    grid-template-columns: repeat(auto-fit, minmax(100px, 1fr));
    grid-auto-rows: 100px;
  }
}
