website/themes/sqrl-hexo-theme-doc/source/style/_doc/layout.scss

body {
  font-size: 16px;
  overflow-y: auto;
  overflow-x: hidden;

  &.doc-navigation--is-collapsed {
    @media screen and (min-width: $doc-breakpoint) {
      .doc-navbar {
        width: $doc-navbar-width-collapsed;
        overflow: hidden;
        border-bottom: 1px solid $doc-navbar-background-color;
      }

      .doc-sidebar {
        transform: translateX(-($doc-sidebar-width - $doc-navbar-width-collapsed));
      }

      .doc-content {
        transform: translateX($doc-sidebar-width-collapsed);
        margin-right: $doc-sidebar-width-collapsed;
      }

      .doc-navbar__logo__text,
      .doc-sidebar-content,
      .doc-navbar__sidebar-close {
        display: none;
      }

      .doc-sidebar__vertical-menu {
        display: block;
      }
    }
  }

  &.doc-sidebar--is-visible {
    @media screen and (max-width: $doc-breakpoint) {
      .doc-sidebar {
        transform: translateX(0);
      }

      .doc-content {
        transform: translateX($doc-sidebar-width);
      }
    }
  }
}

.doc-sidebar__vertical-menu {
  display: none;
}