* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: "Muli", Arial, Helvetica, sans-serif;
}

body {
    padding: 80px 160px;
}
header,
main {
    width: 600px;
}

@media (max-width: 920px) {
    body {
        padding-left: 0;
        padding-right: 0;
    }
    header,
    main {
        margin: 0 auto;
    }
}

@media (max-width: 650px) {
    body {
        padding: 40px 0;
    }
    header,
    main {
        width: 90%;
    }
}

a {
    text-decoration: none;
    color: #727cf4;
    border-bottom: 1px solid #727cf4;
}
p {
    margin-top: 24px;
    font-size: 16.8px;
    line-height: 25.6px;
    color: #252525;
}
strong {
    font-weight: 800;
}
abbr {
    cursor: help;
    border-bottom: 1px dotted #777;
}

h1 {
    font-weight: 900;
    font-size: 40px;
    margin-bottom: 8px;
}
h2 {
    font-weight: 800;
    font-size: 25.6px;
    margin-top: 40px;
}

a.backlink {
    display: inline-block;
    margin-bottom: 32px;
}
span.validity {
    font-style: italic;
}