discourse/app/assets/stylesheets/mobile/discourse.scss

// Mobile
// global styles that apply to the Discourse application specifically
// BEWARE: changing these styles implies they take effect anywhere they are seen
// throughout the Discourse application

// Base Elements

body {
  background-color: var(--secondary);
}

.ios-device {
  textarea {
    background-color: var(--secondary);
    font-size: var(--font-size-ios-input);
    -webkit-tap-highlight-color: transparent;
  }

  input#reply-title {
    -webkit-tap-highlight-color: transparent;
  }
}

blockquote {
  /* 13px left is intentional here to properly align with post quotes */
  padding: 10px 8px 10px 13px;

  p {
    margin: 0 0 10px 0;

    &:last-of-type {
      margin-bottom: 0;
    }
  }
}

// Common classes
.boxed {
  .contents {
    padding: 10px 0 0 0;
  }
}

.control-group {
  margin-bottom: 9px;
}

.mobile-nav {
  margin: 0;
  padding: 0;
  list-style: none;
  position: relative;

  a {
    color: var(--primary);
    .d-icon {
      margin-right: 0.25em;
      color: var(--primary-medium);
    }
  }

  > li > a.expander {
    display: flex;
    align-items: center;
    @include form-item-sizing;
    border-color: var(--primary-medium);
    max-width: 100%;
    .selection {
      @include ellipsis;
      max-width: 120px;
    }

    > .d-icon {
      &:last-of-type {
        margin-left: auto;
        margin-right: 0;
      }
    }
  }

  .drop {
    display: none;
    &.expanded {
      left: 0;
      display: block;
      position: absolute;
      z-index: z("dropdown");
      background-color: var(--secondary);
      width: 100%;
      list-style: none;
      margin: 0;
      padding: 5px;
      border: 1px solid var(--primary-low);
      box-sizing: border-box;

      li {
        margin: 5px 0;
        padding: 0;

        a {
          height: 100%;
          display: block;
          padding: 5px 8px;
          @include ellipsis;
        }
      }
    }
  }
}

.form-vertical {
  .control-group {
    margin-bottom: 12px;
  }
}

// Special elements

#main-outlet-wrapper {
  margin-left: unset;
  margin-right: unset;
}

#main-outlet {
  padding-top: 1.25em;
  &:after {
    // setup overlay for sidebar
    content: "";
    opacity: 0;
    transition: opacity 0.2s;
  }
}

#main {
  position: relative;
}

// Styles used before the user is logged into discourse. For example, activating
// their account or changing their email.
#simple-container {
  width: 90%;
}

// Sidebar styles

.sidebar-wrapper {
  width: 0;
  transition: width 0.2s ease-in-out;
  z-index: z("modal", "content");
}

#main-outlet-wrapper {
  grid-template-columns: 0 minmax(0, 100vw);
  gap: 0;
  .sidebar-container {
    padding-bottom: 6.6em; // extra space to watch out for navbar
  }
}

body.has-sidebar-page {
  .d-header-wrap {
    // edits the z-index when the sidebar is open:
    // header
    // sidebar & body overlay
    // composer
    z-index: z("modal", "content") + 1;
  }

  .sidebar-wrapper {
    width: var(--d-sidebar-width);
    grid-area: content;
    margin-left: -10px; // compensate for main-outlet-wrapper padding
  }

  #main-outlet {
    &:after {
      content: "";
      background: rgb(0, 0, 0); // always a black overlay
      position: absolute;
      top: 0;
      left: 0;
      right: 0;
      bottom: 0;
      z-index: z("modal", "overlay");
      opacity: 0.5;
    }
  }
}