.background_color {
    background: #f7f4f4;
    width: 100%;
    position: absolute;
    top: 0;
    bottom: 0;
  }
  
  .form-signin {
    width: 450px;
    height: 400px;
    background-color: rgb(241, 245, 244);
    box-shadow: 10px 10px 20px rgba(0,0,0,0.2);
    border-radius: 1rem;
    position: absolute;
    left: 0;
    right: 0;
    top: 0;
    bottom: 0;
    margin: auto;
    max-width: 100%;
    max-height: 100%;
    overflow: auto;
    padding: 1em 2em;
    border: 1px solid rgb(94, 78, 238);
    display: table;
  }
  

  div.content {
    display: table-cell;
    vertical-align: middle;
  }