ionic-framework/ionic/components/list/modes/md.scss

// Material Design List
// --------------------------------------------------

$list-md-margin-top:             16px !default;
$list-md-margin-right:           0 !default;
$list-md-margin-bottom:          16px !default;
$list-md-margin-left:            0 !default;

$list-inset-md-margin-top:       16px !default;
$list-inset-md-margin-right:     16px !default;
$list-inset-md-margin-bottom:    16px !default;
$list-inset-md-margin-left:      16px !default;
$list-inset-md-border-radius:    2px !default;

$list-md-header-padding:         16px $item-md-padding-right 16px $item-md-padding-left !default;
$list-md-header-font-size:       1.4rem !default;
$list-md-header-color:           #858585 !default;


/****************/
/* DEFAULT LIST */
/****************/

.list {
  ion-header,
  ion-item-group-title , {
    border-bottom: 1px solid $item-md-border-color;
  }

  .item {
    padding-right: ($item-md-padding-right / 2);
    padding-left: ($item-md-padding-left);
    font-size: $item-md-font-size;
    text-transform: none;

    .item-inner {
      border-bottom: 1px solid $item-md-border-color;
    }
  }

  > .item:first-child {
    border-top: 1px solid $item-md-border-color;
  }

  > .item:last-child,
  > ion-item-sliding:last-child .item {
    border-bottom: 1px solid $item-md-border-color;

    .item-inner {
      border-bottom: none;
    }
  }

  // If the item has the no-lines attribute remove the bottom border from:
  // the item itself (for last-child items)
  // the item-inner class (if it is not last)
  .item[no-lines],
  .item[no-lines] .item-inner {
    border-width: 0;
  }

  ion-header,
  ion-item-group-title {
    border-bottom: 1px solid $item-md-border-color;
    margin-left: 0;
    padding-left: $item-md-padding-left;
  }

  ion-item-content {
    margin: $item-md-padding-top ($item-md-padding-right / 2) $item-md-padding-bottom 0;
  }

  [item-left],
  [item-right] {
    margin: $item-md-padding-media-top ($item-md-padding-right / 2) $item-md-padding-media-bottom 0;
  }

  icon[item-left],
  icon[item-right] {
    margin-top: $item-md-padding-icon-top;
    margin-left: 0;
    margin-bottom: $item-md-padding-icon-bottom;
  }

  button[item-left],
  button[item-right],
  [button][item-left],
  [button][item-right] {
    padding: 0 0.6em;
    min-height: 26px;
    font-size: 1.2rem;
  }

  [item-left].icon-only,
  [item-right].icon-only,
  [item-left].icon-only icon,
  [item-right].icon-only icon {
    padding: 0 1px;
  }

  [item-left][clear],
  [item-right][clear] {
    padding: 0 8px;
  }

  [item-left].icon-left icon,
  [item-right].icon-left icon {
    margin-left: 0;
    margin-bottom: 1px;
    padding-right: 0.3em;
  }

  [item-left].icon-right icon,
  [item-right].icon-right icon {
    margin-right: 0;
    margin-bottom: 1px;
  }

  [text-wrap] ion-item-content {
    font-size: $item-md-body-text-font-size;
    line-height: $item-md-body-text-line-height;
  }

  .item[actions] ion-item-content {
    margin: 4px;
  }

  icon[item-left] + .item-inner,
  icon[item-left] + [text-input] {
    margin-left: $item-md-padding-left + ($item-md-padding-left / 2);
  }

  ion-avatar {
    min-width: $item-md-avatar-size;
    min-height: $item-md-avatar-size;

    img {
      max-width: $item-md-avatar-size;
      max-height: $item-md-avatar-size;
      border-radius: $item-md-avatar-size / 2;
    }
  }

  ion-thumbnail {
    min-width: $item-md-thumbnail-size;
    min-height: $item-md-thumbnail-size;

    img {
      max-width: $item-md-thumbnail-size;
      max-height: $item-md-thumbnail-size;
    }
  }

  h1 {
    margin: 0 0 2px;
    font-size: 2.4rem;
    font-weight: normal;
  }

  h2 {
    margin: 2px 0 2px;
    font-size: 1.6rem;
    font-weight: normal;
  }

  h3,
  h4,
  h5,
  h6 {
    line-height: normal;
    margin: 2px 0 2px;
    font-size: 1.4rem;
    font-weight: normal;
  }

  p {
    line-height: normal;
    color: #666;
    font-size: 1.4rem;
    margin: 0 0 2px;
  }

  button.item.activated {
    box-shadow: none;
  }

  ion-item-options {
    button, [button] {
      height: calc(100% - 2px);
      margin: 1px 0 1px 0;
      box-shadow: none;

      border: none;
      border-radius: 0;
      display: inline-flex;
      align-items: center;
      box-sizing: border-box;

      &:before{
        margin: 0 auto;
      }
    }
  }
}

.list {
  margin: 0 $list-md-margin-right $list-md-margin-bottom $list-md-margin-left;

  ion-header {
    padding: $list-md-header-padding;
    font-size: $list-md-header-font-size;
    color: $list-md-header-color;
  }

  + .list {
    margin-top: $list-md-margin-top + $list-md-margin-bottom;

    ion-header {
      margin-top: -$list-md-margin-top;
      padding-top: 0;
    }
  }
}


/**************/
/* INSET LIST */
/**************/

.list[inset] {
  margin: $list-inset-md-margin-top $list-inset-md-margin-right $list-inset-md-margin-bottom $list-inset-md-margin-left;
  border-radius: $list-inset-md-border-radius;

  .item:first-child {
    border-top-width: 0;
    margin-top: 0;
    border-top-right-radius: $list-inset-md-border-radius;
    border-top-left-radius: $list-inset-md-border-radius;
  }

  .item:last-child {
    border-bottom-width: 0;
    margin-bottom: 0;
    border-bottom-right-radius: $list-inset-md-border-radius;
    border-bottom-left-radius: $list-inset-md-border-radius;
  }

  .item:not(ion-input):last-child:after {
    border-bottom: none;
  }

  + .list[inset] {
    margin-top: 0;
  }
}


/*****************/
/* NO LINES LIST */
/*****************/

.list[no-lines] {
  .item,
  .item .item-inner {
    border-width: 0;
  }
}