body.on-edit {

  // hide unnecessary elements
  .navbar.navbar-static-top,
  .row.row-alerts,
  .row.page-list,
  .row.page-comments-row,
  .row.page-attachments-row,
  .row.not-found-message-row,
  .users-meta,
  .user-page-content-container,
  .portal-form-button,
  .alert-info.alert-moved,
  .alert-info.alert-unlinked,
  .like-button, .bookmark-link, .btn-edit,
  .authors,
  footer {
    display: none !important;
  }

  // hide unnecessary elements for growi layout
  .revision-toc-container {
    display: none;
  }

  // hide unnecessary elements for crowi layout
  #toggle-sidebar,
  .crowi-sidebar {
    display: none;
  }

  /*
   * right tabs
   */
  .nav-main-right-tab:not(.dropdown) {
    // hide if screen size is less than smartphone
    @media (max-width: $screen-xs-max) {
      display: none;
    }
  }

  /*****************
   * Expand Editor
   *****************/
  .expand-by-flex {
    display: flex;
    flex-direction: column;
    flex: 1;
  }
  .container-fluid {
    padding-bottom: 0;
  }
  .main {
    width: 100vw;
    height: 100vh;
    margin-top: 0px !important;
    padding-top: 2px;
    padding-left: 0;
    padding-right: 0;

    // for growi layout
    > .row {
      margin: 0;
      > .col-lg-10, > .col-md-9 {
        width: 100vw;
        padding: 0;
      }
    }

    &,
    .content-main,
    .tab-content,
    .edit-form,
    .page-form {
      @extend .expand-by-flex;
    }

    .page-form {

      // calculate margin
      $header-plus-footer: 2px                      // .main padding-top
                         + 42px                     // .nav height
                         + 1px                      // .page-editor-footer border-top
                         + 40px;                    // .page-editor-footer min-height
      $preview-margin: $header-plus-footer;
      $editor-margin: $header-plus-footer + 22px;   // .btn-open-dropzone height

      #page-editor {
        // right(preview)
        &,
        .row,
        .page-editor-preview-container,
        .page-editor-preview-body {
          height: calc(100vh - #{$preview-margin});
        }
        // left(editor)
        .page-editor-editor-container,
        .react-codemirror2, .CodeMirror, .CodeMirror-scroll {
          height: calc(100vh - #{$editor-margin});
        }
      }

      .page-editor-footer {
        width: 100%;
        margin: 0;
        padding: 3px;
        min-height: 40px;
        border-top: solid 1px transparent;

        .btn-submit {
          width: 100px;
        }
      }

      // slack
      .input-group-slack {
        .input-group-addon {
          padding: 2px 8px;
          line-height: 1em;
          img, input {
            vertical-align: middle;
          }
        }
      }

    }
  }

  .row.bg-title {
    $left-margin: $nav-main-left-tab-width * 2 + 25px;  // width of .nav-main-left-tab x 2 + some margin
    $right-margin: 128px + 94px;                        // width of presentation and history tabs width

    position: absolute;
    z-index: 1;
    left: $left-margin;
    min-width: calc(100% - #{$left-margin} - #{$right-margin});

    // for crowi layout
    > .col-md-9, .col-xs-12 {
      padding: 0;
      width: 100%;
    }

    background: none;

    h1 {
      font-size: 20px;
      line-height: 1em;
    }

    // hide if screen size is less than smartphone
    @media (max-width: $screen-xs-max) {
      display: none;
    }
  }

  /*****************
   * Editor styles
   *****************/
  .page-editor-editor-container {
    border-right: 1px solid transparent;
    padding-right: 0;
    // override CodeMirror styles
    .CodeMirror {
      pre {
        font-family: $font-family-monospace-not-strictly;
      }
      .cm-matchhighlight {
        background-color: cyan;
      }
      .CodeMirror-selection-highlight-scrollbar {
        background-color: darkcyan;
      }
    }

    // for Dropzone
    .dropzone {
      @mixin insertFontAwesome($code) {
        &:before {
          margin-right: 0.2em;
          font-family: FontAwesome;
          content: $code;
        }
      }

      // default layout and style
      .dropzone-overlay {
        // layout
        display: flex;
        justify-content: center;
        align-items: center;
        // style
        margin: 0 15px;
      }
      .dropzone-overlay-content {
        font-size: 2em;
        padding: 0.2em;
        border-radius: 5px;
      }

      // unuploadable or rejected
      &.dropzone-unuploadable, &.dropzone-rejected {
        .dropzone-overlay {
          background: rgba(200,200,200,0.8);
        }
        .dropzone-overlay-content {
          color: #444;
        }
      }
      // uploading
      &.dropzone-uploading {
        .dropzone-overlay {
          background: rgba(255,255,255,0.5);
        }
        .dropzone-overlay-content {
          padding: 0.3em;
          background: rgba(200,200,200,0.5);
          color: #444;
        }
      }

      // unuploadable
      &.dropzone-unuploadable {
        .dropzone-overlay-content {
          // insert content
          @include insertFontAwesome("\f06a ");  // fa-exclamation-circle
          &:after {
            content: "File uploading is disabled";
          }
        }
      }
      // uploadable
      &.dropzone-uploadable {
        // accepted
        &.dropzone-accepted:not(.dropzone-rejected) {
          .dropzone-overlay {
            border: 4px dashed #ccc;
          }
          .dropzone-overlay-content {
            // insert content
            @include insertFontAwesome("\f093");  // fa-upload
            &:after {
              content: "Drop here to upload";
            }
            // style
            color: #666;
            background: rgba(200,200,200,0.8);
          }
        }
        // file type mismatch
        &.dropzone-rejected:not(.dropzone-uploadablefile) .dropzone-overlay-content {
          // insert content
          @include insertFontAwesome("\f03e");  // fa-picture-o
          &:after {
            content: "Only an image file is allowed";
          }
        }
        // multiple files
        &.dropzone-accepted.dropzone-rejected .dropzone-overlay-content {
          // insert content
          @include insertFontAwesome("\f071");  // fa-fa-exclamation-triangle
          &:after {
            content: "Only 1 file is allowed";
          }
        }
      }
    } // end of.dropzone

    .btn-open-dropzone {
      z-index: 2;
      font-size: small;
      text-align: right;
      padding-top: 3px;
      padding-bottom: 0;
      border: none;
      border-radius: 0;
      border-top: 1px dotted #ccc;

      &:active {
        box-shadow: none;
      }
    }
  }
  .page-editor-preview-container {
  }

  .page-editor-preview-body {
    padding-top: 18px;
    padding-right: 15px;
    overflow-y: scroll;
  }

  #page-editor-options-selector {
    label {
      margin-right: 0.5em;
    }

    // configuration dropdown
    .configuration-dropdown {
      .icon-container {
        display: inline-block;
        width: 20px;
      }
      .dropdown-menu > li > a {
        display: flex;
        justify-content: space-between;
        align-items: center;

        .menuitem-label {
          flex: 1;
          margin-right: 10px;
        }
      }
    }

    @media (max-width: $screen-xs-max) { // {{{ less than smartphone size
      display: none;
    }
  }

} // }}}

/*
 * for creating portal
 */
.nav-tabs-create-portal {
  display: none;
}
.on-edit .nav-tabs-create-portal {
  display: block;
}


/*
.crowi.main-container .main .page-list.content-main { // {{{ Edit Form of Page List

  .close-button {
    display: none;
  }
}
.crowi.main-container .main .page-list.content-main.on-edit { // {{{ Edit Form of Page List
  .close-button {
    display: block;
  }

  .page-list-container {
    display: none;
  }

  .portal-form-header {
    height: 16px;
    padding: 8px;
    border-bottom: solid 1px #ccc;
  }
} // }}}
*/
/*
@media (max-width: $screen-sm-max) { // {{{ less than tablet size

  .content-main.on-edit {
    .form-group.form-submit-group {
      select.form-control {
        display: inline-block;
        max-width: 50%;
      }
    }
  }

} // }}}

@media (max-width: $screen-xs-max) { // {{{ less than smartphone size
  #edit-form-submit {
    float: right;
  }
} // }}}
*/
// overwrite .CodeMirror-hints
.CodeMirror-hints {
  // FIXME: required because .content-main.on-edit has 'z-index:1050'
  // z-index: 1060 !important;

  max-height: 30em !important;

  .CodeMirror-hint.crowi-emoji-autocomplete {
    font-family: $font-family-monospace-not-strictly;
    line-height: 1.6em;

    .img-container {
      display: inline-block;
      width: 30px;
    }
  }
  // active line
  .CodeMirror-hint-active.crowi-emoji-autocomplete {
    .img-container {
      font-size: 15px;  // adjust to .wiki
      padding-top: 0.3em;
      padding-bottom: 0.3em;
    }
  }

}