Mailspring/internal_packages/composer/stylesheets/composer.less

// The ui-variables file is provided by base themes provided by Atom.
//
// See https://github.com/atom/atom-dark-ui/blob/master/stylesheets/ui-variables.less
// for a full listing of what's available.
@import "ui-variables";
@import "ui-mixins";
@import "buttons";

.composer-full-window {
  width: 100%;
  height: 100%;
  .composer-outer-wrap {
    width: 100%;
    height: 100%;
  }
  .composer-inner-wrap {
    .compose-body {
      margin-bottom: 0;
      position: relative;
    
      .contenteditable-container {
        position:absolute;
        width:100%;
        height:100%;

        div[contenteditable] {
          // Ensure that the contentEditable always fills the window,
          // but leaves room for the quoted text marker at the bottom.
          min-height: calc(~"100% - 30px");
        }
      }
    }
  }
}

.composer-inner-wrap {
  height: 100%;
  display: flex;
  flex-flow: column;
  padding-bottom: 57px;
  position: relative;

  .composer-header {
    padding: 11px 15px 5px 15px;

    .composer-title {
      display: inline-block;
      .bold;
    }

    .composer-header-actions {
      float: right;
      color: @text-color-subtle;
      font-size: @minor-font-size;
    }
    .header-action {
      padding-left: 1em;
      &:hover {
        color: @text-color-link;
        cursor: pointer;
      }
    }
  }

  input, textarea, div[contenteditable] {
    display: block;
    background: inherit;
    width: 100%;
    resize: none;
    border: none;
  }

  .compose-toolbar-wrap {
    display: inline-block;

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

  .compose-toolbar {
    display: none;
    box-shadow: @standard-shadow;
    padding: 1px 1px 2px 1px;
    position: absolute;
    background: white;
    z-index: 2;
    bottom: 48px;
    margin-left: -37.5px;
  }

  [disabled] {
    background: rgba(0, 0, 0, 0.2);
  }

  .btn-send {
    .btn-variant(@action-color);
    margin-right: 15px;
  }

  .compose-participants-wrap {
    padding: 5px 15px 0 15px;
  }

  .compose-subject-wrap {
    margin: 9px 15px 0 15px;

    input {
      font-size: @major-font-size;
      height:30px;
    }
  }

  .compose-body {
    flex: 1;
    display: flex;
    cursor: text;
    overflow: auto;
    margin: 0.7em 15px 15px 15px;
    position: relative;

    .quoted-text-toggle {
      margin:0;
    }

    div[contenteditable] {
      min-height: 150px;
    }
  }

  .compose-field {
    border-bottom: 1px solid @border-color-divider;
  }

  .compose-footer {
    padding: 10px 15px;
    background: @background-color-accent;
    position: absolute;
    width: 100%;
    bottom: 0;
    text-align: left;

    .btn-icon {
      position: relative;
      top: 2px;
      margin-right:0;
      color:rgba(255,255,255, 0.6);
      box-shadow:none;
      &:hover,&:active {
        background-color:transparent;
        color:rgba(255,255,255, 1);
      }
    }
  }

  // TODO FIXME DRY From stylesheets/message-list.less
  .attachments-area {
    padding: 0px 15px 0px 15px;
    border-top: 1px solid @border-color-divider;
    .attachment-file-wrap {
      padding-top: 5px;
      &.pending, &.started, &.progress {
        color: @text-color-subtle;
        .attachment-file-actions { visibility: visible; }
        .attachment-file-and-name:hover { cursor: default; color: @text-color-subtle; }
      }

      &.completed, &.success {
        color: @text-color-success; // Success state
        .attachment-file-actions { visibility: hidden; }
        .attachment-file-and-name:hover { cursor: default; color: @text-color-success; }
        .attachment-upload-progress { background: @background-color-success; }
      }

      &.aborted, &.failed {
        color: @text-color-error;
        .attachment-file-actions { visibility: hidden; }
        .attachment-file-and-name:hover { cursor: default; color: @text-color-error; }
        .attachment-upload-progress { background: @background-color-error; }
      }
    }

    .attachment-file-actions {
      margin-left: 0.4em;
    }
  }
}

#new-compose-button {
  order: 1;

  background: @background-color-accent;
  padding: 10px 15px 13px 15px;
  text-align: center;

  .btn-compose {
    .btn-variant(@action-color);
  }
}