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

body {
  background-color: darkseagreen;
}

.container {
  display: flex;
  flex-direction: row;
  justify-content: center;
  align-items: center;
}

#fileDrop {
  width: 600px;
  height: 600px;
  background-color: lightblue;
  border-radius: 24px;
}

#fileContent {
  background-color: #fff;
}