/* border */
/* box shadow */
/* btn */
.zw-row {
  position: relative;
  display: block;
  box-sizing: border-box;
  height: auto;
  margin-left: 0;
  margin-right: 0;
  zoom: 1;
}
.zw-row:before, .zw-row:after {
  content: " ";
  display: table;
}
.zw-row:after {
  clear: both;
}
.zw-row--flex {
  display: flex;
  flex-wrap: wrap;
}

.zw-row--flex-start {
  justify-content: flex-start;
}
.zw-row--flex-end {
  justify-content: flex-end;
}
.zw-row--flex-center {
  justify-content: center;
}
.zw-row--flex-space-between {
  justify-content: space-between;
}
.zw-row--flex-space-around {
  justify-content: space-around;
}
.zw-row--flex-top {
  align-items: flex-start;
}
.zw-row--flex-bottom {
  align-items: flex-end;
}
.zw-row--flex-middle {
  align-items: center;
}