discourse/app/assets/stylesheets/common/base/menu-panel.scss

.menu-panel.slide-in {
  position: fixed;
  right: 0;
  box-shadow: shadow("header");

  .panel-body {
    width: 100%;
  }
}
.header-cloak {
  display: none;
}

.menu-panel.drop-down {
  position: absolute;
  // positions are relative to the .d-header .panel div
  top: 100%; // directly underneath .panel
  right: -10px; // 10px to the right of .panel - adjust as needed
  max-height: 80vh;
}

.menu-panel {
  border: 1px solid var(--primary-low);
  box-shadow: shadow("menu-panel");
  background-color: var(--secondary);
  z-index: z("header");
  padding: 0.5em;
  width: 320px;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  hr {
    margin: 3px 0;
  }

  .panel-header {
    position: absolute;
    right: 20px;
  }

  ul {
    list-style: none;
    margin: 0;
    padding: 0;
  }

  .panel-body {
    display: flex;
    touch-action: pan-y pinch-zoom;
    overflow: hidden;
    height: 100%;
  }

  .panel-body-contents {
    max-height: 100%;
    width: 100%;
    display: flex;
    flex-direction: column;
  }

  .panel-body-bottom {
    display: flex;
    flex: 1 0 0%; // safari height fix
    margin-top: 0.5em;
    flex-wrap: wrap;

    .show-all {
      display: flex;
      flex: 1 1 auto;
      button {
        width: 100%;
      }
    }
    .notifications-dismiss {
      margin-left: 0.5em;
    }

    .btn {
      background-color: var(--primary-very-low);
      color: var(--primary-high);
      &:hover {
        background: var(--primary-low);
        color: var(--primary);
      }
    }
  }

  .badge-notification {
    vertical-align: text-bottom;
  }
}

.hamburger-panel {
  a.widget-link {
    width: 100%;
    box-sizing: border-box;
    @include ellipsis;
  }
  .panel-body {
    overflow-y: auto;
  }

  span.badge-category {
    max-width: 100px;
  }
}

.menu-links.columned {
  li {
    width: 50%;
    float: left;
  }
}

.menu-panel {
  .widget-link,
  .categories-link {
    padding: 0.25em 0.5em;
    display: block;
    color: var(--primary);
    &:hover,
    &:focus {
      background-color: var(--highlight-medium);
      outline: none;
    }

    .d-icon {
      color: var(--primary-medium);
    }

    .new {
      font-size: $font-down-1;
      margin-left: 0.5em;
      color: var(--primary-med-or-secondary-med);
    }

    &.show-help,
    &.filter {
      color: var(--tertiary);
    }
  }

  li.category-link {
    float: left;
    background-color: transparent;
    display: inline-flex;
    align-items: center;
    padding: 0.25em 0.5em;
    width: 50%;
    box-sizing: border-box;
    a {
      display: inline-flex;
      &:hover,
      &:focus {
        background: transparent;

        .category-name {
          color: var(--primary);
        }
      }
    }
    .badge-notification {
      color: var(--primary-med-or-secondary-med);
      background-color: transparent;
      display: inline;
      padding: 0;
      font-size: $font-down-1;
      line-height: $line-height-large;
    }
    .badge-wrapper {
      &.bar,
      &.bullet {
        color: var(--primary);
        padding: 0 0 0 0.15em;
      }
      &.box {
        color: var(--secondary);
        + a.badge.badge-notification {
          padding-top: 2px;
        }
        span {
          z-index: z("base") * -1;
        }
      }
    }
  }

  // note these topic counts only appear for anons in the category hamburger drop down
  b.topics-count {
    color: var(--primary-med-or-secondary-med);
    font-weight: normal;
    font-size: $font-down-1;
  }

  div.discourse-tags {
    font-size: $font-down-1;
  }
}

.user-menu {
  .quick-access-panel {
    width: 100%;
    display: flex;
    flex-direction: column;
    min-height: 0;
    max-height: 100%;
    border-top: 1px solid var(--primary-low);
    padding-top: 0.75em;
    margin-top: -1px;
    &:focus {
      outline: none;
    }
    h3 {
      padding: 0 0.4em;
      font-weight: bold;
      margin: 0.5em 0;
    }

    .d-icon,
    &:hover .d-icon {
      color: var(--primary-medium);
    }
    .icon {
      color: var(--primary-high);
    }

    .btn-primary {
      .d-icon {
        color: var(--secondary);
      }
    }

    ul {
      display: flex;
      flex-flow: column wrap;
      overflow: hidden;
      max-height: 100%;
    }

    li {
      background-color: var(--tertiary-low);
      box-sizing: border-box;
      list-style-type: none;

      // This is until other languages remove the HTML from within
      // notifications. It can then be removed
      div .fa {
        display: none;
      }

      span:first-child {
        color: var(--primary);
      }

      span.double-user,
      // e.g., "username, username2"
      span.multi-user
      // e.g., "username, username2, and n others"
      {
        display: inline-flex;
        max-width: 100%;
        align-items: baseline;
        white-space: nowrap;
      }

      span.multi-user
      // e.g., "username, username2, and n others"
      {
        span.multi-username:nth-of-type(2) {
          // margin between username2 and "and n others"
          margin-right: 0.25em;
        }
      }

      // truncate when usernames are very long
      span.multi-username {
        @include ellipsis;
        flex: 0 1 auto;
        min-width: 1.2em;
        max-width: 10em;
        &:nth-of-type(2) {
          // margin for comma between username and username2
          margin-left: 0.25em;
        }
      }

      &:hover {
        background-color: var(--highlight-medium);
        outline: none;
      }

      &:focus-within {
        background: var(--highlight-medium);
        a {
          // we don't need the link focus because we're styling the parent
          outline: 0;
        }
        .btn-flat:focus {
          // undo default btn-flat style
          background: transparent;
        }
      }

      a {
        display: flex;
        margin: 0.25em;
        padding: 0em 0.25em;
      }

      button {
        padding: 0.25em 0.5em;
      }

      a,
      button {
        > div {
          overflow: hidden; // clears the text from wrapping below icons
          overflow-wrap: anywhere;
          @supports not (overflow-wrap: anywhere) {
            word-break: break-word;
          }

          // Truncate items with more than 2 lines.
          @include line-clamp(2);
        }
      }

      p {
        margin: 0;
        overflow: hidden;
      }
    }
    li:not(.show-all) {
      padding: 0;
      align-self: flex-start;
      width: 100%;
      .d-icon {
        padding-top: 0.2em;
        margin-right: 0.5em;
      }
    }
    .is-warning {
      .d-icon-far-envelope {
        color: var(--danger);
      }
    }
    .read {
      background-color: var(--secondary);
    }
    .none {
      padding-top: 5px;
    }
    .spinner-container {
      min-height: 2em;
    }
    .spinner {
      width: 20px;
      height: 20px;
      border-width: 2px;
      margin: 0 auto;
    }
    .show-all a {
      width: 100%;
      display: flex;
      justify-content: center;
      align-items: center;
      min-height: 30px;
      color: var(--primary-med-or-secondary-high);
      background: var(--blend-primary-secondary-5);
      &:hover {
        color: var(--primary);
        background: var(--primary-low);
      }
    }
    /* as a big ol' click target, don't let text inside be selected */
    @include unselectable;

    &.quick-access-profile {
      display: inline;
      li:not(.show-all) a {
        color: var(--primary);
        display: flex;
      }
      ul button {
        line-height: 1.4; // match 'ul a' link height
        width: 100%;
        display: flex;
      }
      @media screen and (max-height: 360px) {
        // two column grid to avoid scroll
        ul {
          display: grid;
          grid-template-columns: repeat(2, minmax(0, 1fr));
          grid-gap: 0 1em;
          a {
            @include ellipsis;
          }
          button {
            span:not(.relative-date) {
              @include ellipsis;
            }
          }
        }
        li:not(.show-all) a {
          color: var(--primary);
          display: flex;
        }
      }
    }
  }
}

div.menu-links-header {
  width: 100%;
  .menu-links-row {
    box-sizing: border-box;
    display: flex;
    width: 100%;
    z-index: 2;
    justify-content: space-between;

    .glyphs {
      display: inline-flex;
      align-items: center;
      flex-wrap: nowrap;
      width: 100%;
      justify-content: space-between;
      padding: 0;

      button {
        display: flex;
        flex: 1 1 auto;
        padding: 0.65em 0.25em 0.75em;
        justify-content: center;

        svg {
          pointer-events: none;
        }
      }
    }

    button {
      // This is to make sure active and inactive tab icons have the same
      // size. `box-sizing` does not work and I have no idea why.
      border: 1px solid transparent;
      &:not(.active):hover {
        border-bottom: 0;
        margin-top: -1px;
      }
    }

    button.active {
      border: 1px solid var(--primary-low);
      border-bottom: 1px solid var(--secondary);
      position: relative;

      .d-icon {
        color: var(--primary-high);
      }

      &:hover {
        background-color: inherit;
      }
    }
  }

  button:hover,
  button:focus {
    background-color: var(--primary-low);
    outline: none;
    &.active {
      background-color: var(--primary-very-low);
    }
  }
  button {
    padding: 0.3em 0.5em;
  }

  .glyphs {
    display: table-cell;
    width: auto;
    text-align: center;
  }
  .glyphs:first-child {
    text-align: left;
  }

  .glyphs:last-child {
    text-align: right;
  }
  .fa,
  button {
    color: var(--primary-med-or-secondary-med);
  }
}