.header{
    min-height: 100vh;
    width: 100%;
    background-image: linear-gradient(to bottom, rgba(4, 9, 30, 0.8), rgba(4, 9, 30, 0.8)),url(../../static/Images/banner-bg.jpg);
    background-position: center;
    background-size: cover;
    background-attachment: fixed;
    position: relative;
  }