.bac1{
    background: rgba(255,255,255,0.6) url(https://media.istockphoto.com/id/1456247049/vector/modern-american-house-with-a-swimming-pool-in-the-backyard-cartoon-illustration.jpg?b=1&s=612x612&w=0&k=20&c=9_SVds_Y6VF3c2VH2rw-7sPSKGxfXAoX6zXjwIJPz3g=);
    background-size: cover;
    background-blend-mode: overlay;
}

#lan-1{
    text-align: center;
    font-family: 'Times New Roman', Times, serif;
}

.btn-sign-in{
    border: 4px solid;
    padding: 5px;
    padding-left: 13px;
    font-size: medium;
    font-family: serif;
    border-radius: 30%;
    background-color: #f3f3f600;
    border-color: #3c509c;
    padding-right: 13px;
}
.btn-sign-in:hover{
    background-color: #3c509c;
    color : white;
    cursor:pointer;
}

@media (max-width:500px){

        #lan-1{
            padding: 35%;
            padding-top: 50%;
           
        }
        #lan-1 h1{
            font-size: xx-large;
            color: rgb(0, 0, 0);
        }
        #lan-1 h2{
            font-size: x-large;
            color: rgb(0, 0, 0);
        }
       
    }

@media (min-width:500px) and (max-width:900px) {


        #lan-1{
            padding: 20%;
            padding-top: 45%;
        }


        #lan-1 h1{
            font-size: xxx-large;
            color: rgb(0, 0, 0);
        }
        
        #lan-1 h2{
            font-size: x-large;
            color: rgb(0, 0, 0);
        }
}
@media (min-width:900px) and (max-width:1140px) {


        #lan-1{
            padding: 20%;
            padding-top: 35%;
        }


        #lan-1 h1{
            font-size: xxx-large;
            color: rgb(0, 0, 0);
        }
        
        #lan-1 h2{
            font-size: xx-large;
            color: rgb(0, 0, 0);
        }
}

@media (min-width:1140px) {
    
        #lan-1{
            padding: 16%;
            
        }

        #lan-1 h1{
            font-size: xxx-large;
            color: rgb(0, 0, 0);
        }
        
        #lan-1 h2{
            font-size: xx-large;
            color: rgb(0, 0, 0);
        }
        
        
   }