@mixin flex {
  display: flex;
}

@mixin rn {
  flex-flow: row nowrap;
}

@mixin cn {
  flex-flow: column nowrap;
}

@mixin flex-rn {
  @include flex;
  @include rn;
  align-items: center;
}

@mixin flex-cn {
  @include flex;
  @include cn;
  align-items: center;
}

@mixin flex-h-c {
  @include flex-rn;
  justify-content: center;
}

@mixin flex-v-c {
  @include flex-cn;
  justify-content: center;
}