.sass responsive mixins
=vp-min($viewport)
@media screen and (min-width: $viewport)
@content
=vp-max($viewport)
@media screen and (max-width: $viewport)
@content
=vp-min-max($v-min, $v-max)
@media screen and (min-width: $v-min) and (max-width: $v-max)
@content
=bp($media)
@if $media == "tablet"
@media screen and (max-width: 1024px)
@content
@if $media == "tablet-portrait"
@media screen and (max-width: 800px)
@content
@if $media == "mobile"
@media screen and (max-width: 720px)
@content
@if $media == "mobile-portrait"
@media screen and (max-width: 400px) and (orientation: portrait)
@content