GMail - show big icon when no preview selected by mjw72652

/* ==UserStyle==
@name           GMail - show big icon when no preview selected
@namespace      mail.google.com
@version        1.0.0
@author         Anatoliy Oblaukhov
==/UserStyle== */

@-moz-document domain("mail.google.com") {
    .nH.apP +.nH {
        display: none;
    }

    .nH.apP,
    .nH.aNW {
        float: left;
        width: 50%;
        height: calc(100vh - 112px) !important;
    }

    .apa {
        min-height: 0 !important;
    }

    .apb {
        font-size: 0;
        display: flex;
        align-items: center;
        width: 100%;
        height: calc(100% - 80px);
        justify-content: center;
    }

    .apc {
        font-size: 16px;
        background: #f5f4f4 url(https://vignette.wikia.nocookie.net/logopedia/images/7/7f/GmailIconFromOlderAndroid.png) center 30px no-repeat;
        padding: 260px 0 25px 0;
        border: 1px solid #e0e0e0;
        margin-top: 0;
        width: 368px;
    }
}