main {
  margin: 0 35px;
}

main h2 {
  margin-left: 25px;
  text-decoration: underline;
}

.credit {
  margin: 0;
  margin-top: 4px;
  font-size: 0.9rem;
  font-style: italic;
  color: #ffffffc5
}

.pictures {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  grid-column-gap: 6px;
  grid-row-gap: 12px;
}
@media only screen and (max-width: 800px) {
  .pictures {
    grid-template-columns: repeat(1, 1fr);
  }
}
@media only screen and (min-width: 1200px) {
  .pictures {
    grid-template-columns: repeat(6, 1fr);
  }
}

.pictures img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  cursor: pointer;
  transition: 0.3s;
}

.pictures img:hover {
  opacity: 0.7;
}

/* The Modal (background) */
#image-viewer {
  display: none;
  position: fixed;
  z-index: 1;
  padding-top: 50px;
  left: 0;
  top: 0;
  width: 100%;
  height: 100%;
  overflow: auto;
  background-color: rgba(0,0,0,0.9);
}
.modal-content {
  margin: auto;
  display: block;
  width: 80%;
  max-width: 90vw;
  max-height: 90vh;
  object-fit: contain;
}
.modal-content { 
  animation-name: zoom;
  animation-duration: 0.6s;
}
@keyframes zoom {
  from {transform:scale(0)} 
  to {transform:scale(1)}
}
#image-viewer #credit-img-viewer {
  text-align: center;
  margin-top: 12px
}
#image-viewer .close {
  position: absolute;
  top: 15px;
  right: 35px;
  color: #f1f1f1;
  font-size: 40px;
  font-weight: bold;
  transition: 0.3s;
}
#image-viewer .close:hover,
#image-viewer .close:focus {
  color: #bbb;
  text-decoration: none;
  cursor: pointer;
}

@media only screen and (max-width: 700px){
  .modal-content {
      width: 100%;
  }
}