.main {
    margin: 0;
    font-family: 'Segoe UI', sans-serif;
    font-size: 17px;
    line-height: 1.6;
}
h1{
    margin: 0;
    padding: 1.5% 10%;
    background-color: rgb(08, 36, 64);
    text-align: center;
}
.up-h {
    color: whitesmoke;
}
.down-h {
    color:  rgb(08, 36, 64);
}
article {
    margin: 0;
    padding: 15px 15%;
}
.article1 {
    background-color: dodgerblue;
}
.article2 {
    background-color: whitesmoke;
}
li {
    margin-bottom: 10px;
    list-style-type: lower-alpha;
}
a {
    text-decoration: none;
    color: dodgerblue;
    font-weight: 700;
}
a:hover {
    color: rgb(08, 36, 64);
}
pre {
    box-sizing: border-box;
    /* max-width: 100%; */
    border: solid dodgerblue 2px;
    overflow: scroll;
}
.code-example {
    font-size: 15px;
    line-height: 1.4;
    box-sizing: border-box;
    display: block;
    margin-left: -80px;
}
@media screen and (max-width: 700px) {
    .main {
        font-size: 14px;
        line-height: 1.4;
    }
    h1{
        padding: 1%;
    }
    article {
        font-size: 15px;
        padding: 5px 4%;
    }
}