exp {
    display: block;
    position: absolute;
    right: 0;
    bottom: 0;
    z-index: 100;
    width: auto;
    max-width: 80vw;
    height: auto;
    font-family: Segoe UI, Meiryo UI, sans-serif;
    line-height: 1.2;
    font-size: 80%;
    color: #555;
}
code {
    background: pink;
    font-family: Consolas, monospace;
    padding: 2px 4px;
    margin: 0 4px;
    border-radius: 2px;
}
h1 {
    border-bottom: 2px solid #555;
    text-align: right;
    font-weight: lighter;
    font-style: italic;
}
strong {
    border-bottom: 1px solid #555;
}