body,
body * {
  -webkit-box-sizing: border-box;
  box-sizing: border-box;
}

body,
.container,
.row {
  margin: 0;
  padding: 0;
  height: 100vh;
}

.under_cons{
    background-image: url(../static/under_construction.jpg);
    background-repeat: no-repeat;
    background-attachment: fixed;
    background-position: center;
    background-size: contain;
    margin: 0 auto;
    height: 100%;
}