html {
  font-size: 16px;
}

body {
  margin: 0;
  font-family: 'Source Sans Pro', sans-serif;
  background-color: #f0f0f0;
}

h1 {
  font-weight: normal;
  margin-top: 0;
}

.download-button {
  color: white;
  text-decoration: none;
  background-color: #6080ff;
  padding: .5em;
  border-radius: .5em;
}

.container {
  margin: 2em auto;
  width: 87em;
}

.photo-cards {
  display: flex;
  flex-wrap: wrap;
  gap: 1em;

  /* ul reset */
  padding: 0;
}

.photo-card {
  list-style: none;
  padding: .5em;
  box-shadow: 0 0 .5em rgba(0, 0, 0, 20%);
  background-color: white;
}

.photo-card-wrapper {
  display: block;
}

.photo-card-image {
}

.photo-card-image img {
  width: 20em;
  height: 15em;
  object-fit: contain;
  object-position: center;
}

.photo-card-label {

}

footer {
  text-align: center;
}

@media (max-width: 90em) {
  .container {
    width: 65em;
  }
}

@media (max-width: 68em) {
  .container {
    width: 43em;
  }
}

@media (max-width: 46em) {
  .container {
    width: auto;
    margin: 2em 1em;
  }

  .photo-cards {
    display: block;
  }
  
  .photo-card-image img {
    width: 100%;
    height: auto;
  }

  .photo-card + .photo-card {
    margin-top: 1em;
  }
}