Gmail – bring back the old 2018 fonts by soustruh

/* ==UserStyle==
@name           Gmail 2018 – bring back the old fonts
@namespace      USO Archive
@author         Martin Stružský
@description    `– Replaces the font mess (Roboto, Google Sans etc.) with Arial (I don't like it either, but my eyes are used to it), even in Settings and just everywhere :-)– Zero letter–spacing– Restores previous font sizes– Squeezes the rows a little`
@version        20181019.23.15
@license        NO-REDISTRIBUTION
@preprocessor   uso
==/UserStyle== */
@-moz-document domain("mail.google.com") {
* {
    /* good bye roboto :-) */
    font-family: arial, sans-serif !important;
    letter-spacing: 0 !important;
}

.zA {
    /* inbox rows */
	padding-top: 8px;
	padding-bottom: 8px;
}

.zA * {
    /* inbox rows */
	font-size: 13px !important;
}

.xY .av {
    /* inbox labels */
	font-size: 11px !important;
}
}