style.css

* {
  margin: 0;
  padding: 0;
}
.thumbnail {
  background-color: chocolate;
}
body {
  margin-top: 33px;
}
.container {
  background-color: darkgray;
  text-align: center;
  width: 50%;
  margin-left: 400px;
  margin-right: 400px;
}
.text-center {
  padding-top: 5px;
  padding-bottom: 5px;
}
.hero {
  padding-bottom: 10px;
  padding-left: 10px;
  padding-right: 10px;
}
.img-circle {
  border-radius: 50%;
  padding-top: 15px;
}
.row {
  background-color: darkgray;
  text-align: center;
  width: 50%;
  margin-left: 400px;
  margin-right: 400px;
}
.hero2 {
  padding-top: 10px;
  padding-bottom: 7px;
}
.hero3 {
  padding-bottom: 10px;
  padding-left: 10px;
  padding-right: 10px;
}
.main {
  transform-origin: top left;
  animation: hinge 2s ease-in-out;
}

@keyframes hinge {
  20%,
  60% {
    transform: rotate(80deg);
  }
  40%,
  80% {
    transform: rotate(60deg);
    opacity: 1;
  }
  100% {
    transform: translateY(600px);
    opacity: 0;
  }
}