html, body {
  margin: 0;
  padding: 0;
}

body {
  background-image: url(bg.png);
}

footer {
  width: 100%;
  height: 120vh;
  position: relative;
  z-index: 2;
  background-color: green;
}

section {
  position: relative;
  z-index: 1;
  width: 100%;
  height: 120vh;
  background-color: orange;
}

.box .image-wrapper {
  width: 100%;
  height: 100%;
  position: relative;
}

.box .image {
  position: absolute;
  left: 0;
  right: 0;
  top: 0;
  bottom: 0;
  background: url(./cage.jpg) center no-repeat;
  background-size: cover;
}

.box-wrapper {
  // padding: 20%;
  overflow: hidden;
}

.image-box {
  // overflow: hidden;
}

.box {
  position: relative;

  &.medium {
    width: 300px;
    height: 300px;
    background-color: #273c75;
  }

  &.small {
    width: 150px;
    height: 150px;
    margin-left: 40%;
    background-color: #40739e;
  }

  &.large {
    width: 400px;
    height: 400px;
    background-color: darkgoldenrod;
    margin-left: 50%
  }
}

.spacer {
  &.medium {
    height: 200px;
  }
}