body {
    margin-left: 15%;
    margin-right: 15%;
    background-color: white
    }
img {
    border: 0
    }
h1, h2, h3, h4 {
    text-align: center
    }
.ind {
    margin-left: 10%;
    margin-right: 10%
    }
hr {
    text-align: center;
    width: 50%
    }
.ctr {
    text-align: center
    }