.center {
    margin: auto;
    /*border: 5px solid #FFFF00;*/
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    width: 80%;
    }

.container {
  position: absolute;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%);
  width: 80%;
  padding: 10px;
  /*border: 3px solid green;*/
}