.logo_box
{
    background-color: #8a2be2;
    text-align: center;
    padding: 4%;
    box-sizing: border-box;
}
#logo
{
    width: 250px;
}
.row
{
    margin-top: 3%;
}
button
{
    margin-bottom: 4%;
}
#open_in_app_btn
{
    background-color: #8a2be2;
    color: #ffffff;
}
.footer {
    position: fixed;
    left: 0;
    bottom: 0;
    width: 100%;
    text-align: center;
    background-color: #ffffff;
  }

  html, body
  {
    color: #ffffff;
    background-color: #343a40;
  }