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

.menu-panel.slide-in {
  position: fixed;
  right: 0;

  .panel-body {
    position: absolute;
    top: 3px;
    bottom: 37px;
    width: 97%;
  }
}

.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
}

.menu-panel {
  border: 1px solid dark-light-diff($primary, $secondary, 90%, -60%);
  box-shadow: 0 2px 2px rgba(0,0,0, .25);
  background-color: $secondary;
  z-index: 1100;
  padding: 0.5em;
  width: 300px;

  hr {
    margin: 3px 0;
  }

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

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

  .panel-body {
    overflow-y: auto;
    overflow-x: hidden;
  }

}

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

.menu-panel {
  ul.menu-links li, ul li.heading {
    a {
      padding: 0.25em 0.5em;
      display: block;
      &:hover {
        background-color: dark-light-diff($highlight, $secondary, 50%, -55%);
      }
    }

    .new {
      font-size: 0.8em;
      margin-left: 0.5em;
      color: dark-light-choose(scale-color($primary, $lightness: 50%), scale-color($secondary, $lightness: 50%));
    }

  }

  li.category-link {
    float: left;
    background-color: transparent;
    width: 45%;
    margin: 5px 5px 0 8px;
    .box {margin-top: 0;}
    .badge-notification {
      color: dark-light-choose(scale-color($primary, $lightness: 50%), scale-color($secondary, $lightness: 50%));
      background-color: transparent;
      display: inline;
      padding: 0;
    }
  }

  // note these topic counts only appear for anons in the category hamburger drop down
  b.topics-count {
    color: dark-light-choose(scale-color($primary, $lightness: 50%), scale-color($secondary, $lightness: 50%));
    font-weight: normal;
    font-size: 11px;
  }

  span.badge-category {
    max-width: 90px;
    overflow: hidden;
    text-overflow: ellipsis;
  }

}

.search-menu {

  .search-context .show-help {
    float: right;
  }

  .heading {
    padding: 5px 0 5px 5px;
    .filter {
      padding: 0 5px;
    }
  }

  input[type='text'] {
    margin: 0.5em 3px;
    box-sizing: border-box;
    width: calc(100% - 6px);
    height: 32px;
    padding: 5px;
  }

  .search-context {
    padding: 0 5px;
    label { margin-bottom: 0; }
  }

  .searching {
    position: absolute;

    top: -3px;
    right: 0.75em;
    .drop-down-visible & {
      top: 0.2em;
      right: 1.2em;
    }
    .spinner {
      width: 10px;
      height: 10px;
      border-width: 2px;
      margin: 20px 0 0 0;
    }
  }
  // I am ghetto using this to display "Show More".. be warned
  .no-results {
    padding: 5px;
    text-align: center;
  }
  .filter {
    padding: 0;
    &:hover {background: transparent;}
  }

  .search-link {
    .badge-category-parent {
      line-height: 0.8em;
    }
    .topic-title {
      margin-right: 6px;
    }

    .topic-statuses {
      float: none;
      display: inline-block;
      color: dark-light-choose(scale-color($primary, $lightness: 50%), scale-color($secondary, $lightness: 50%));
      margin: 0;
      .fa {
        margin: 0;
      }
    }
  }

  li:not(.category):not(.heading) {
    font-size: 0.929em;
    line-height: 16px;

    .fa {
      font-size: inherit;
    }

    a {
      display: block;
      padding: 5px;
      transition: all linear .15s;
    }

    &:hover a:not(.badge-notification) {
      background-color: dark-light-diff($highlight, $secondary, 50%, -55%);
    }

    button {margin-left: 5px;}
  }
}

.user-menu {

  .notifications {
    h3 {
      padding: 0 0.4em;
      font-weight: bold;
      margin: 0.5em 0;
    }

    .fa { color: dark-light-choose(scale-color($primary, $lightness: 50%), scale-color($secondary, $lightness: 50%)); }
    .icon { color: dark-light-choose(scale-color($primary, $lightness: 30%), scale-color($secondary, $lightness: 70%)); }
    li {
      background-color: dark-light-diff($tertiary, $secondary, 85%, -65%);
      padding: 0.25em 0.5em;
      i {
        float: left;
        margin-right: 5px;
        padding-top: 2px;
      }
      span { color: $primary; }
      &:hover { background-color: dark-light-diff($highlight, $secondary, 50%, -55%); }
      a { padding: 0; }
      p {
        margin: 0;
        overflow: hidden;
      }
    }
    .is-warning {
      i.fa-envelope-o {
        &:before {
          content: "\f0e0";
        }
        color: $danger;
      }
    }
    .read {
      background-color: $secondary;
    }
    .none {
      padding-top: 5px;
    }
    .spinner-container.visible {
      min-height: 30px;
    }
    .spinner {
      width: 20px;
      height: 20px;
      border-width: 2px;
      margin: 0 auto;
    }
    /* as a big ol' click target, don't let text inside be selected */
    @include unselectable;
  }
}

.notifications .logout {
  padding: 0.25em;
  &:hover {
    background-color: dark-light-diff($highlight, $secondary, 50%, -55%);
  }
}

div.menu-links-header {
  width: 100%;
  display: table;
  border-collapse: separate;
  border-spacing: 0 0.5em;
  .menu-links-row {
    display: table-row;
  }
  a:hover {
    background-color: dark-light-diff($highlight, $secondary, 50%, -55%);
  }
  a {
    padding: 0.5em;
  }
  a.user-activity-link {
    max-width: 150px;
    display: block;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    margin: -0.5em 0;
  }
  li {
    display: table-cell;
    width: auto;
    text-align: center;
  }
  li:first-child {
    text-align: left;
  }

  li:last-child {
    text-align: right;
  }
  .fa, a {
    color: dark-light-choose(scale-color($primary, $lightness: 50%), scale-color($secondary, $lightness: 50%));
  }

  a {
    font-size: 1.1em;
  }
  .fa-user {
    margin-right: 0.2em;
  }
}