* {
  box-sizing: border-box;
  font-family: Roboto, sans-serif;
}

body {
  margin: 0;
}


.gallery img {
  display: inline-block;
  width: 100%;
  height: auto;
  margin: 10px 0 0 0;
  cursor: pointer;
}

.lightbox {
  position: fixed;
  top: 0;
  left: 0;
  display: -webkit-box;
  display: -ms-flexbox;
  display: flex;
  -webkit-box-pack: center;
      -ms-flex-pack: center;
          justify-content: center;
  -webkit-box-align: center;
      -ms-flex-align: center;
          align-items: center;
  width: 100%;
  height: 100%;
  background: rgba(34, 34, 34, 0.9);
  cursor: pointer;
  cursor: -webkit-zoom-out;
}
.lightbox figure {
  position: relative;
  margin: 0;
  cursor: auto;
  box-shadow: 0 0 30px -5px #000;
}
.lightbox figure figcaption {
  position: absolute;
  z-index: 1;
  display: block;
  width: 100%;
  padding: 5px;
  text-align: center;
  background: rgba(255, 255, 255, 0.9);
  font-size: 1.2em;
  font-weight: 300;
  opacity: 0;
  -webkit-transition: opacity 400ms;
  transition: opacity 400ms;
  cursor: text;
  /* IE didn't inherit "cursor: auto;" as set in "figure {}" */
}
.lightbox figure figcaption:empty {
  display: none;
}
.lightbox figure img {
  display: block;
  max-width: 95vw;
  max-height: 95vh;
}
.lightbox figure .prev, .lightbox figure .next {
  position: absolute;
  top: 50%;
  -webkit-transform: translateY(-50%);
          transform: translateY(-50%);
  display: block;
  border-top: 12px solid transparent;
  border-bottom: 12px solid transparent;
  -webkit-filter: drop-shadow(0 1px 1px #000);
          filter: drop-shadow(0 1px 1px #000);
  cursor: pointer;
  -webkit-user-select: none;
     -moz-user-select: none;
      -ms-user-select: none;
          user-select: none;
  opacity: 0;
  -webkit-transition: 400ms;
  transition: 400ms;
}
.lightbox figure .prev {
  left: 0;
  border-right: 24px solid #fff;
}
.lightbox figure .next {
  right: 0;
  border-left: 24px solid #fff;
}

figure:hover figcaption, figure:hover .prev, figure:hover .next {
  opacity: 1;
}
figure:hover .prev {
  left: 10px;
}
figure:hover .next {
  right: 10px;
}

.overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  z-index: 1000;
  background: rgba(255, 255, 255, 0.9);
  display: -webkit-box;
  display: -ms-flexbox;
  display: flex;
  -webkit-box-pack: center;
      -ms-flex-pack: center;
          justify-content: center;
  -webkit-box-align: center;
      -ms-flex-align: center;
          align-items: center;
  -ms-flex-flow: column nowrap;
      flex-flow: column nowrap;
}
.overlay h1 {
  font-weight: 400;
}
.overlay .close {
  position: fixed;
  top: 0;
  right: 0;
  padding: 20px;
  color: #f00;
  font-size: 2em;
  cursor: pointer;
}