*
{
    margin:0;
    padding:0;
}

header
{
    background-image: linear-gradient(rgba(116, 143, 120, 1), rgba(116, 143, 120, 1));
    height: 100vh;
    background-position: center;
    background-size: cover;
}

.landing
{
    top:50%;
    left:50%;
    position:absolute;
    transform: translate(-50%,-50%);
    color:#fff;
    text-align: center;
}