*{
    padding: 0;
    margin: 0;
}

.background{
    background-image: url(shirzad.jpg);
    background-position: center;
    background-repeat: no-repeat;
    background-size: cover;
    height: 100vh;
    width: 100vw;
}

.overlay {
    position:absolute;
    top:0;
    left:0;
    right:0;
    bottom:0;
    background-color:rgba(0, 0, 0, 0.85);
    color:white;
    display: flex;
    justify-content: center;
    align-items: center;
}

h2{
    color: #fff;
    font-size: 55px;
    
    
}

h4{
    color: #fff;
    font-size: 35px;
    
    
}