ortant}@-webkit-keyframes flipInX{0%{-webkit-transform:perspective(400px) rotate3d(1,0,0,90deg);transform:perspective(400px) rotate3d(1,0,0,90deg);transition-timing-function:ease-in;opacity:0}40%{-webkit-transform:perspective(400px) rotate3d(1,0,0,-20deg);transform:perspective(400px) rotate3d(1,0,0,-20deg);transition-timing-function:ease-in}60%{-webkit-transform:perspective(400px) rotate3d(1,0,0,10deg);transform:perspective(400px) rotate3d(1,0,0,10deg);opacity:1}80%{-webkit-transform:perspective(400px)...

null for the last breakpoint.\n//\n//    >> breakpoint-next(sm)\n//    md\n//    >> breakpoint-next(sm, (xs: 0, sm: 576px, md: 768px, lg: 992px, xl: 1200px))\n//    md\n//    >> breakpoint-next(sm, $breakpoint-names: (xs sm md lg xl))\n//    md\n@function breakpoint-next($name, $breakpoints: $grid-breakpoints, $breakpoint-names: map-keys($breakpoints)) {\n  $n: index($breakpoint-names, $name);\n  @return if($n != null and $n < length($breakpoint-names), nth($breakpoint-names, $n + 1), null);\n}\n\n//...

null for the last breakpoint.\n//\n//    >> breakpoint-next(sm)\n//    md\n//    >> breakpoint-next(sm, (xs: 0, sm: 576px, md: 768px, lg: 992px, xl: 1200px))\n//    md\n//    >> breakpoint-next(sm, $breakpoint-names: (xs sm md lg xl))\n//    md\n@function breakpoint-next($name, $breakpoints: $grid-breakpoints, $breakpoint-names: map-keys($breakpoints)) {\n  $n: index($breakpoint-names, $name);\n  @return if($n != null and $n < length($breakpoint-names), nth($breakpoint-names, $n + 1), null);\n}\n\n//...