body ,button{
  margin: 0;
  padding: 0;
  font-size: 1.2rem;
  color: #333;
}

div{
  box-sizing: border-box;
}

.yx-flex-row-start-stretch {
  display: flex;
  display: -webkit-flex;
  justify-content: flex-start;
  -webkit-justify-content: flex-start;
  align-items: stretch;
  -webkit-align-items: stretch;
  flex-direction: row;
  -webkit-flex-direction: row;

}

.yx-flex-row-start-center {
  display: flex;
  display: -webkit-flex;
  justify-content: flex-start;
  -webkit-justify-content: flex-start;
  align-items: center;
  -webkit-align-items: center;
  flex-direction: row;
  -webkit-flex-direction: row;

}

.yx-flex-row-start-start {

  display: flex;
  display: -webkit-flex;
  justify-content: flex-start;
  -webkit-justify-content: flex-start;
  align-items: flex-start;
  -webkit-align-items: flex-start;
  flex-direction: row;
  -webkit-flex-direction: row;
}

.yx-flex-row-start-end {

  display: flex;
  display: -webkit-flex;
  justify-content: flex-start;
  -webkit-justify-content: flex-start;
  align-items: flex-end;
  -webkit-align-items: flex-end;
  flex-direction: row;
  -webkit-flex-direction: row;
}

.yx-flex-row-center-start {

  display: flex;
  display: -webkit-flex;
  justify-content: center;
  -webkit-justify-content: center;
  align-items: flex-start;
  -webkit-align-items: flex-start;
  flex-direction: row;
  -webkit-flex-direction: row;
}

.yx-flex-row-center-center {
  /* @include flexBox($jc: center, : center); */
  display: flex;
  display: -webkit-flex;
  justify-content: center;
  -webkit-justify-content: center;
  align-items: center;
  -webkit-align-items: center;
  flex-direction: row;
  -webkit-flex-direction: row;
}

.yx-flex-row-center-end {
  /* @include flexBox($jc: center, : flex-end); */
  display: flex;
  display: -webkit-flex;
  justify-content: flex-start;
  -webkit-justify-content: flex-start;
  align-items: flex-end;
  -webkit-align-items: flex-end;
  flex-direction: row;
  -webkit-flex-direction: row;
}

.yx-flex-row-end-center {
  /* @include flexBox($jc: flex-end); */
  display: flex;
  display: -webkit-flex;
  justify-content: flex-end;
  -webkit-justify-content: flex-end;
  align-items: center;
  -webkit-align-items: center;
  flex-direction: row;
  -webkit-flex-direction: row;
}

.yx-flex-row-spaceA-center {
  /* @include flexBox($jc: space-around); */
  display: flex;
  display: -webkit-flex;
  justify-content: space-around;
  -webkit-justify-content: space-around;
  align-items: center;
  -webkit-align-items: center;
  flex-direction: row;
  -webkit-flex-direction: row;
}

.yx-flex-row-spaceB-center {
  /* @include flexBox($jc: space-between); */
  display: flex;
  display: -webkit-flex;
  justify-content: space-between;
  -webkit-justify-content: space-between;
  align-items: center;
  -webkit-align-items: center;
  flex-direction: row;
  -webkit-flex-direction: row;
}

.yx-flex-row-spaceB-end {
  /* @include flexBox($jc: space-between, : flex-end); */
  display: flex;
  display: -webkit-flex;
  justify-content: space-between;
  -webkit-justify-content: space-between;
  align-items: flex-end;
  -webkit-align-items: flex-end;
  flex-direction: row;
  -webkit-flex-direction: row;
}

.yx-flex-row-spaceB-start {
  /* @include flexBox($jc: space-between, : flex-start); */
  display: flex;
  display: -webkit-flex;
  justify-content: space-between;
  -webkit-justify-content: space-between;
  align-items: flex-start;
  -webkit-align-items: flex-start;
  flex-direction: row;
  -webkit-flex-direction: row;
}

.yx-flex-col-start-center {
  /* @include flexBox(: column, $jc: flex-start, : center) */
  display: flex;
  display: -webkit-flex;
  justify-content: flex-start;
  -webkit-justify-content: flex-start;
  align-items: center;
  -webkit-align-items: center;
  flex-direction: column;
  -webkit-flex-direction: column;
}

.yx-flex-col-center-spaceB {
  /* @include flexBox(: column, $jc: center, : center) */
  display: flex;
  display: -webkit-flex;
  justify-content: center;
  -webkit-justify-content: center;
  align-items: stretch;
  -webkit-align-items: stretch;
  flex-direction: column;
  -webkit-flex-direction: column;

}

.yx-flex-col-center-center {
  /* @include flexBox(: column, $jc: center, : center) */
  display: flex;
  display: -webkit-flex;
  justify-content: center;
  -webkit-justify-content: center;
  align-items: center;
  -webkit-align-items: center;
  flex-direction: column;
  -webkit-flex-direction: column;

}


.yx-flex-col-center-end {
  /* @include flexBox(: column, $jc: center, : flex-end); */
  display: flex;
  display: -webkit-flex;
  justify-content: flex-end;
  -webkit-justify-content: flex-end;
  align-items: center;
  -webkit-align-items: center;
  flex-direction: column;
  -webkit-flex-direction: column;
}

.yx-flex-col-center-start {
  /* @include flexBox(: column, $jc: center, : flex-start)  */
  display: flex;
  display: -webkit-flex;
  justify-content: center;
  -webkit-justify-content: center;
  align-items: flex-start;
  -webkit-align-items: flex-start;
  flex-direction: column;
  -webkit-flex-direction: column;
}

.yx-flex-col-spaceB-center {
  /* @include flexBox(: column, $jc: space-between, : stretch)  */
  display: flex;
  display: -webkit-flex;
  justify-content: space-between;
  -webkit-justify-content: space-between;
  align-items: stretch;
  -webkit-align-items: stretch;
  flex-direction: column;
  -webkit-flex-direction: column;
}

.yx-flex-col-spaceA-center {
  /* @include flexBox(: column, $jc: space-around, : stretch)  */
  display: flex;
  display: -webkit-flex;
  justify-content: space-around;
  -webkit-justify-content: space-around;
  align-items: stretch;
  -webkit-align-items: stretch;
  flex-direction: column;
  -webkit-flex-direction: column;
}


.yx-flex-wrap {

  flex-wrap: wrap;
  -webkit-flex-wrap: wrap;
}

.yx-flex-nowrap {

  flex-wrap: nowrap;
  -webkit-flex-wrap: nowrap;
}


.yx-flex-0 {
  flex-shrink: 0;
}

.yx-flex-1 {
  flex-grow: 1;
}

.yx-flex-2 {
  flex-grow: 2;
}

.yx-text-left {
  text-align: left;
}

.yx-text-center {
  text-align: center;
}

.yx-text-right {
  text-align: right;
}

.yx-text-error {
  color: #dd524d;
}

.yx-text-error {
  color: #dd524d;
}

.yx-text-progress {
  color: #007aff;
}