Gmail conversation view order reversal by HerrHulaHoop

/* ==UserStyle==
@name           Gmail conversation view reversal
@namespace      https://github.com/HerrHulaHoop
@version        1.0.3
@description    Reverses the order of emails shown in the Gmail conversation view (Email threading) such that the newest emails are shown at the top (Similar to Outlook). Modified version of https://github.com/bartsolutions/gmail-conversation-reversal
@author         HerrHulaHoop <herrhulahoop@proton.me> (https://github.com/HerrHulaHoop)
@license        GPL-3.0-or-later
==/UserStyle== */

@-moz-document domain("mail.google.com") {
  .nH[role="list"], .nH div[role=list] {
    display: flex;
    flex-direction: column-reverse;
  }
  /* Top email */
  .nH .h7.bg[role=listitem]:nth-last-child(1) .Bk .G3.G2 {
    border-top: none;
  }
  /* Second email */
  .nH div[role=listitem]:nth-last-child(2) .Bk .G3.G2 {
    border-top: 1px solid rgba(100, 121, 143, 0.122);
  }
  /* Second-last email */
  .nH div[role=listitem]:nth-child(2) .Bk .G3.G2 {
    border-bottom: 1px solid rgba(100, 121, 143, 0.122);
  }
}