discourse/app/assets/stylesheets/common/components/user-status-message.scss

.user-status-message-tooltip {
  .emoji {
    width: 1em;
    height: 1em;
  }

  .user-status-tooltip-description {
    font-weight: bold;
    margin-left: 0.1em;
    vertical-align: middle;
  }

  .user-status-tooltip-until {
    margin-top: 0.2em;
    color: var(--primary-medium);
  }
}