* {
    font-family:
        -apple-system,
        BlinkMacSystemFont,
        "Segoe UI",
        Roboto,
        Helvetica,
        Arial,
        "Apple Color Emoji",
        "Segoe UI Emoji",
        "Segoe UI Symbol",
        sans-serif;
}

#container,
#button-container {
    max-width: 800px;
    margin: 1em auto;
}

#button-container {
    padding: 0 10px;
}

#pdf {
    border: 1px solid silver;
    border-radius: 3px;
    background: #a4edba;
    padding: 0.5em 1em;
    cursor: pointer;
    transition: background 0.3s;
}

#pdf:hover {
    background: #8ae09d;
}

#pdf i {
    margin-right: 1em;
}
