.title {
    margin-left: 8%
    }
.title1 {
    margin-left: 8%;
    font-size: 2em;
    font-weight: bold
    }
.title2 {
    margin-left: 8%;
    font-size: 1.5em;
    font-weight: bold
    }
.title3 {
    margin-left: 8%;
    font-size: 1.3em;
    font-weight: bold
    }
h1, h2, h3 {
    text-align: center
    }
hr {
    text-align: center;
    width: 50%
    }
body {
    margin-left: 10%;
    margin-right: 10%;
    background-color: white
    }
.toc {
    text-align: center
    }