body{
    margin: 0;
    padding: 100px;
}
.black-bg{
    background-color: #7fffd4;
    border-radius: 10px;
}
.carousel-item{
    padding: 20px 40px;
}
.price{
    color: #FF136F;
}
.buy-now-button{
    color: white;
    background-color: red;
    border-radius: 20px;
}
.ca{
    color: orange;
    text-align: center;
}
#smartphone{
    border-radius: 20px;
}
.orange-bg{
    background-color: cyan;
    border-radius: 10px;
    height: 400px;
}
footer{
    text-align: center;
}