umbo

diff --git a/src/grid.css b/src/grid.css
index bc7ee08bb962e207f1d05b39d6a4eb9380c1c1ad..7ff5ee80915b2ed1b8e38dc8ce5ccc23f7f7ccb1 100644
--- a/src/grid.css
+++ b/src/grid.css
@@ -1,26 +1,3 @@
-:root {
-  --gutter-width: 16px;
-  --outer-margin: 32px;
-  --gutter-compensation: calc((var(--gutter-width) * 0.5) * -1);
-  --half-gutter-width: calc((var(--gutter-width) * 0.5));
-  --xs-min: 0rem;
-  --sm-min: 576px;
-  --md-min: 768px;
-  --lg-min: 992px;
-  --xl-min: 1200px;
-}
-
-@custom-media --sm-viewport only screen and (min-width: 576px);
-@custom-media --md-viewport only screen and (min-width: 768px);
-@custom-media --lg-viewport only screen and (min-width: 992px);
-@custom-media --xl-viewport only screen and (min-width: 1200px);
-
-@custom-media --xs-only only screen and (max-width: 575px);
-@custom-media --sm-only only screen and (min-width: 576px) and (max-width: 767px);
-@custom-media --md-only only screen and (min-width: 768px) and (max-width: 991px);
-@custom-media --lg-only only screen and (min-width: 992px) and (max-width: 1199px);
-@custom-media --xl-only only screen and (min-width: 1200px);
-
 .container {
   box-sizing: border-box;
   margin-left: auto;
@@ -30,53 +7,67 @@   padding-left: 8px;
 }
 
 .container-fluid {
-  padding-right: var(--gutter-width, 16px);
-  padding-left: var(--gutter-width, 16px);
+  padding-right: 16px;
+  padding-left: 16px;
 }
 
-@media (--sm-viewport) {
+@media only screen and (min-width: 576px) {
   .container {
-    width: calc(var(--sm-min) - var(--gutter-width));
+   width: 560px;
     max-width: 100%;
   }
 }
 
-@media (--md-viewport) {
+@media only screen and (min-width: 768px) {
   .container {
-    width: calc(var(--md-min) - var(--gutter-width));
+    width: 752px;
     max-width: 100%;
   }
 }
 
-@media (--lg-viewport) {
+@media only screen and (min-width: 992px) {
   .container {
-    width: calc(var(--lg-min) - var(--gutter-width));
+    width: 976px;
     max-width: 100%;
   }
 }
 
-@media (--xl-viewport) {
+@media only screen and (min-width: 1200px) {
   .container {
-    width: calc(var(--xl-min) - var(--gutter-width));
+    width: 1184px;
     max-width: 100%;
   }
 }
 
 .row {
   box-sizing: border-box;
+  display: -webkit-box;
+  display: -ms-flexbox;
   display: flex;
+  -webkit-box-flex: 0;
+  -ms-flex: 0 1 auto;
   flex: 0 1 auto;
+  -webkit-box-orient: horizontal;
+  -webkit-box-direction: normal;
+  -ms-flex-direction: row;
   flex-direction: row;
+  -ms-flex-wrap: wrap;
   flex-wrap: wrap;
-  margin-right: var(--gutter-compensation, -08px);
-  margin-left: var(--gutter-compensation, -08px);
+  margin-right: -8px;
+  margin-left: -8px;
 }
 
 .row.reverse {
+  -webkit-box-orient: horizontal;
+  -webkit-box-direction: reverse;
+  -ms-flex-direction: row-reverse;
   flex-direction: row-reverse;
 }
 
 .col.reverse {
+  -webkit-box-orient: vertical;
+  -webkit-box-direction: reverse;
+  -ms-flex-direction: column-reverse;
   flex-direction: column-reverse;
 }
 
@@ -211,75 +202,93 @@ .col-xl-offset-10,
 .col-xl-offset-11,
 .col-xl-offset-12 {
   box-sizing: border-box;
+  -webkit-box-flex: 0;
+  -ms-flex: 0 0 auto;
   flex: 0 0 auto;
+  -ms-flex-preferred-size: 100%;
   flex-basis: 100%;
-  padding-right: var(--half-gutter-width, 8px);
-  padding-left: var(--half-gutter-width, 8px);
+  padding-right: 8px;
+  padding-left: 8px;
   max-width: 100%;
 }
 
 .col-xs {
+  -webkit-box-flex: 1;
+  -ms-flex-positive: 1;
   flex-grow: 1;
+  -ms-flex-preferred-size: 0;
   flex-basis: 0;
   max-width: 100%;
 }
 
 .col-xs-1 {
+  -ms-flex-preferred-size: 8.33333333%;
   flex-basis: 8.33333333%;
   max-width: 8.33333333%;
 }
 
 .col-xs-2 {
+  -ms-flex-preferred-size: 16.66666667%;
   flex-basis: 16.66666667%;
   max-width: 16.66666667%;
 }
 
 .col-xs-3 {
+  -ms-flex-preferred-size: 25%;
   flex-basis: 25%;
   max-width: 25%;
 }
 
 .col-xs-4 {
+  -ms-flex-preferred-size: 33.33333333%;
   flex-basis: 33.33333333%;
   max-width: 33.33333333%;
 }
 
 .col-xs-5 {
+  -ms-flex-preferred-size: 41.66666667%;
   flex-basis: 41.66666667%;
   max-width: 41.66666667%;
 }
 
 .col-xs-6 {
+  -ms-flex-preferred-size: 50%;
   flex-basis: 50%;
   max-width: 50%;
 }
 
 .col-xs-7 {
+  -ms-flex-preferred-size: 58.33333333%;
   flex-basis: 58.33333333%;
   max-width: 58.33333333%;
 }
 
 .col-xs-8 {
+  -ms-flex-preferred-size: 66.66666667%;
   flex-basis: 66.66666667%;
   max-width: 66.66666667%;
 }
 
 .col-xs-9 {
+  -ms-flex-preferred-size: 75%;
   flex-basis: 75%;
   max-width: 75%;
 }
 
 .col-xs-10 {
+  -ms-flex-preferred-size: 83.33333333%;
   flex-basis: 83.33333333%;
   max-width: 83.33333333%;
 }
 
 .col-xs-11 {
+  -ms-flex-preferred-size: 91.66666667%;
   flex-basis: 91.66666667%;
   max-width: 91.66666667%;
 }
 
 .col-xs-12 {
+  -ms-flex-preferred-size: 100%;
   flex-basis: 100%;
   max-width: 100%;
 }
@@ -333,115 +342,151 @@   margin-left: 91.66666667%;
 }
 
 .start-xs {
+  -webkit-box-pack: start;
+  -ms-flex-pack: start;
   justify-content: flex-start;
   text-align: start;
 }
 
 .center-xs {
+  -webkit-box-pack: center;
+  -ms-flex-pack: center;
   justify-content: center;
   text-align: center;
 }
 
 .end-xs {
+  -webkit-box-pack: end;
+  -ms-flex-pack: end;
   justify-content: flex-end;
   text-align: end;
 }
 
 .top-xs {
+  -webkit-box-align: start;
+  -ms-flex-align: start;
   align-items: flex-start;
 }
 
 .middle-xs {
+  -webkit-box-align: center;
+  -ms-flex-align: center;
   align-items: center;
 }
 
 .bottom-xs {
+  -webkit-box-align: end;
+  -ms-flex-align: end;
   align-items: flex-end;
 }
 
 .around-xs {
+  -ms-flex-pack: distribute;
   justify-content: space-around;
 }
 
 .between-xs {
+  -webkit-box-pack: justify;
+  -ms-flex-pack: justify;
   justify-content: space-between;
 }
 
 .first-xs {
+  -webkit-box-ordinal-group: 0;
+  -ms-flex-order: -1;
   order: -1;
 }
 
 .last-xs {
+  -webkit-box-ordinal-group: 2;
+  -ms-flex-order: 1;
   order: 1;
 }
 
 .initial-order-xs {
+  -webkit-box-ordinal-group: NaN;
+  -ms-flex-order: initial;
   order: initial;
 }
 
-@media (--sm-viewport) {
+@media only screen and (min-width: 576px) {
   .col-sm {
+    -webkit-box-flex: 1;
+    -ms-flex-positive: 1;
     flex-grow: 1;
+    -ms-flex-preferred-size: 0;
     flex-basis: 0;
     max-width: 100%;
   }
 
   .col-sm-1 {
+    -ms-flex-preferred-size: 8.33333333%;
     flex-basis: 8.33333333%;
     max-width: 8.33333333%;
   }
 
   .col-sm-2 {
+    -ms-flex-preferred-size: 16.66666667%;
     flex-basis: 16.66666667%;
     max-width: 16.66666667%;
   }
 
   .col-sm-3 {
+    -ms-flex-preferred-size: 25%;
     flex-basis: 25%;
     max-width: 25%;
   }
 
   .col-sm-4 {
+    -ms-flex-preferred-size: 33.33333333%;
     flex-basis: 33.33333333%;
     max-width: 33.33333333%;
   }
 
   .col-sm-5 {
+    -ms-flex-preferred-size: 41.66666667%;
     flex-basis: 41.66666667%;
     max-width: 41.66666667%;
   }
 
   .col-sm-6 {
+    -ms-flex-preferred-size: 50%;
     flex-basis: 50%;
     max-width: 50%;
   }
 
   .col-sm-7 {
+    -ms-flex-preferred-size: 58.33333333%;
     flex-basis: 58.33333333%;
     max-width: 58.33333333%;
   }
 
   .col-sm-8 {
+    -ms-flex-preferred-size: 66.66666667%;
     flex-basis: 66.66666667%;
     max-width: 66.66666667%;
   }
 
   .col-sm-9 {
+    -ms-flex-preferred-size: 75%;
     flex-basis: 75%;
     max-width: 75%;
   }
 
   .col-sm-10 {
+    -ms-flex-preferred-size: 83.33333333%;
     flex-basis: 83.33333333%;
     max-width: 83.33333333%;
   }
 
   .col-sm-11 {
+    -ms-flex-preferred-size: 91.66666667%;
     flex-basis: 91.66666667%;
     max-width: 91.66666667%;
   }
 
   .col-sm-12 {
+    -ms-flex-preferred-size: 100%;
     flex-basis: 100%;
     max-width: 100%;
   }
@@ -495,54 +540,75 @@     margin-left: 91.66666667%;
   }
 
   .start-sm {
+    -webkit-box-pack: start;
+    -ms-flex-pack: start;
     justify-content: flex-start;
     text-align: start;
   }
 
   .center-sm {
+    -webkit-box-pack: center;
+    -ms-flex-pack: center;
     justify-content: center;
     text-align: center;
   }
 
   .end-sm {
+    -webkit-box-pack: end;
+    -ms-flex-pack: end;
     justify-content: flex-end;
     text-align: end;
   }
 
   .top-sm {
+    -webkit-box-align: start;
+    -ms-flex-align: start;
     align-items: flex-start;
   }
 
   .middle-sm {
+    -webkit-box-align: center;
+    -ms-flex-align: center;
     align-items: center;
   }
 
   .bottom-sm {
+    -webkit-box-align: end;
+    -ms-flex-align: end;
     align-items: flex-end;
   }
 
   .around-sm {
+    -ms-flex-pack: distribute;
     justify-content: space-around;
   }
 
   .between-sm {
+    -webkit-box-pack: justify;
+    -ms-flex-pack: justify;
     justify-content: space-between;
   }
 
   .first-sm {
+    -webkit-box-ordinal-group: 0;
+    -ms-flex-order: -1;
     order: -1;
   }
 
   .last-sm {
+    -webkit-box-ordinal-group: 2;
+    -ms-flex-order: 1;
     order: 1;
   }
 
   .initial-order-sm {
+    -webkit-box-ordinal-group: NaN;
+    -ms-flex-order: initial;
     order: initial;
   }
 }
 
-@media (--md-viewport) {
+@media only screen and (min-width: 768px) {
   .col-md,
   .col-md-1,
   .col-md-2,
@@ -570,73 +636,90 @@   .col-md-offset-10,
   .col-md-offset-11,
   .col-md-offset-12 {
     box-sizing: border-box;
+    -webkit-box-flex: 0;
+    -ms-flex: 0 0 auto;
     flex: 0 0 auto;
-    padding-right: var(--half-gutter-width, 08px);
-    padding-left: var(--half-gutter-width, 08px);
+    padding-right: 8px;
+    padding-left: 8px;
   }
 
   .col-md {
+    -webkit-box-flex: 1;
+    -ms-flex-positive: 1;
     flex-grow: 1;
+    -ms-flex-preferred-size: 0;
     flex-basis: 0;
     max-width: 100%;
   }
 
   .col-md-1 {
+    -ms-flex-preferred-size: 8.33333333%;
     flex-basis: 8.33333333%;
     max-width: 8.33333333%;
   }
 
   .col-md-2 {
+    -ms-flex-preferred-size: 16.66666667%;
     flex-basis: 16.66666667%;
     max-width: 16.66666667%;
   }
 
   .col-md-3 {
+    -ms-flex-preferred-size: 25%;
     flex-basis: 25%;
     max-width: 25%;
   }
 
   .col-md-4 {
+    -ms-flex-preferred-size: 33.33333333%;
     flex-basis: 33.33333333%;
     max-width: 33.33333333%;
   }
 
   .col-md-5 {
+    -ms-flex-preferred-size: 41.66666667%;
     flex-basis: 41.66666667%;
     max-width: 41.66666667%;
   }
 
   .col-md-6 {
+    -ms-flex-preferred-size: 50%;
     flex-basis: 50%;
     max-width: 50%;
   }
 
   .col-md-7 {
+    -ms-flex-preferred-size: 58.33333333%;
     flex-basis: 58.33333333%;
     max-width: 58.33333333%;
   }
 
   .col-md-8 {
+    -ms-flex-preferred-size: 66.66666667%;
     flex-basis: 66.66666667%;
     max-width: 66.66666667%;
   }
 
   .col-md-9 {
+    -ms-flex-preferred-size: 75%;
     flex-basis: 75%;
     max-width: 75%;
   }
 
   .col-md-10 {
+    -ms-flex-preferred-size: 83.33333333%;
     flex-basis: 83.33333333%;
     max-width: 83.33333333%;
   }
 
   .col-md-11 {
+    -ms-flex-preferred-size: 91.66666667%;
     flex-basis: 91.66666667%;
     max-width: 91.66666667%;
   }
 
   .col-md-12 {
+    -ms-flex-preferred-size: 100%;
     flex-basis: 100%;
     max-width: 100%;
   }
@@ -690,54 +773,75 @@     margin-left: 91.66666667%;
   }
 
   .start-md {
+    -webkit-box-pack: start;
+    -ms-flex-pack: start;
     justify-content: flex-start;
     text-align: start;
   }
 
   .center-md {
+    -webkit-box-pack: center;
+    -ms-flex-pack: center;
     justify-content: center;
     text-align: center;
   }
 
   .end-md {
+    -webkit-box-pack: end;
+    -ms-flex-pack: end;
     justify-content: flex-end;
     text-align: end;
   }
 
   .top-md {
+    -webkit-box-align: start;
+    -ms-flex-align: start;
     align-items: flex-start;
   }
 
   .middle-md {
+    -webkit-box-align: center;
+    -ms-flex-align: center;
     align-items: center;
   }
 
   .bottom-md {
+    -webkit-box-align: end;
+    -ms-flex-align: end;
     align-items: flex-end;
   }
 
   .around-md {
+    -ms-flex-pack: distribute;
     justify-content: space-around;
   }
 
   .between-md {
+    -webkit-box-pack: justify;
+    -ms-flex-pack: justify;
     justify-content: space-between;
   }
 
   .first-md {
+    -webkit-box-ordinal-group: 0;
+    -ms-flex-order: -1;
     order: -1;
   }
 
   .last-md {
+    -webkit-box-ordinal-group: 2;
+    -ms-flex-order: 1;
     order: 1;
   }
 
   .initial-order-md {
+    -webkit-box-ordinal-group: NaN;
+    -ms-flex-order: initial;
     order: initial;
   }
 }
 
-@media (--lg-viewport) {
+@media only screen and (min-width: 992px) {
   .col-lg,
   .col-lg-1,
   .col-lg-2,
@@ -765,73 +869,90 @@   .col-lg-offset-10,
   .col-lg-offset-11,
   .col-lg-offset-12 {
     box-sizing: border-box;
+    -webkit-box-flex: 0;
+    -ms-flex: 0 0 auto;
     flex: 0 0 auto;
-    padding-right: var(--half-gutter-width, 08px);
-    padding-left: var(--half-gutter-width, 08px);
+    padding-right: 8px;
+    padding-left: 8px;
   }
 
   .col-lg {
+    -webkit-box-flex: 1;
+    -ms-flex-positive: 1;
     flex-grow: 1;
+    -ms-flex-preferred-size: 0;
     flex-basis: 0;
     max-width: 100%;
   }
 
   .col-lg-1 {
+    -ms-flex-preferred-size: 8.33333333%;
     flex-basis: 8.33333333%;
     max-width: 8.33333333%;
   }
 
   .col-lg-2 {
+    -ms-flex-preferred-size: 16.66666667%;
     flex-basis: 16.66666667%;
     max-width: 16.66666667%;
   }
 
   .col-lg-3 {
+    -ms-flex-preferred-size: 25%;
     flex-basis: 25%;
     max-width: 25%;
   }
 
   .col-lg-4 {
+    -ms-flex-preferred-size: 33.33333333%;
     flex-basis: 33.33333333%;
     max-width: 33.33333333%;
   }
 
   .col-lg-5 {
+    -ms-flex-preferred-size: 41.66666667%;
     flex-basis: 41.66666667%;
     max-width: 41.66666667%;
   }
 
   .col-lg-6 {
+    -ms-flex-preferred-size: 50%;
     flex-basis: 50%;
     max-width: 50%;
   }
 
   .col-lg-7 {
+    -ms-flex-preferred-size: 58.33333333%;
     flex-basis: 58.33333333%;
     max-width: 58.33333333%;
   }
 
   .col-lg-8 {
+    -ms-flex-preferred-size: 66.66666667%;
     flex-basis: 66.66666667%;
     max-width: 66.66666667%;
   }
 
   .col-lg-9 {
+    -ms-flex-preferred-size: 75%;
     flex-basis: 75%;
     max-width: 75%;
   }
 
   .col-lg-10 {
+    -ms-flex-preferred-size: 83.33333333%;
     flex-basis: 83.33333333%;
     max-width: 83.33333333%;
   }
 
   .col-lg-11 {
+    -ms-flex-preferred-size: 91.66666667%;
     flex-basis: 91.66666667%;
     max-width: 91.66666667%;
   }
 
   .col-lg-12 {
+    -ms-flex-preferred-size: 100%;
     flex-basis: 100%;
     max-width: 100%;
   }
@@ -885,54 +1006,75 @@     margin-left: 91.66666667%;
   }
 
   .start-lg {
+    -webkit-box-pack: start;
+    -ms-flex-pack: start;
     justify-content: flex-start;
     text-align: start;
   }
 
   .center-lg {
+    -webkit-box-pack: center;
+    -ms-flex-pack: center;
     justify-content: center;
     text-align: center;
   }
 
   .end-lg {
+    -webkit-box-pack: end;
+    -ms-flex-pack: end;
     justify-content: flex-end;
     text-align: end;
   }
 
   .top-lg {
+    -webkit-box-align: start;
+    -ms-flex-align: start;
     align-items: flex-start;
   }
 
   .middle-lg {
+    -webkit-box-align: center;
+    -ms-flex-align: center;
     align-items: center;
   }
 
   .bottom-lg {
+    -webkit-box-align: end;
+    -ms-flex-align: end;
     align-items: flex-end;
   }
 
   .around-lg {
+    -ms-flex-pack: distribute;
     justify-content: space-around;
   }
 
   .between-lg {
+    -webkit-box-pack: justify;
+    -ms-flex-pack: justify;
     justify-content: space-between;
   }
 
   .first-lg {
+    -webkit-box-ordinal-group: 0;
+    -ms-flex-order: -1;
     order: -1;
   }
 
   .last-lg {
+    -webkit-box-ordinal-group: 2;
+    -ms-flex-order: 1;
     order: 1;
   }
 
   .initial-order-lg {
+    -webkit-box-ordinal-group: NaN;
+    -ms-flex-order: initial;
     order: initial;
   }
 }
 
-@media (--xl-viewport) {
+@media only screen and (min-width: 1200px) {
   .col-xl,
   .col-xl-1,
   .col-xl-2,
@@ -960,73 +1102,90 @@   .col-xl-offset-10,
   .col-xl-offset-11,
   .col-xl-offset-12 {
     box-sizing: border-box;
+    -webkit-box-flex: 0;
+    -ms-flex: 0 0 auto;
     flex: 0 0 auto;
-    padding-right: var(--half-gutter-width, 08px);
-    padding-left: var(--half-gutter-width, 08px);
+    padding-right: 8px;
+    padding-left: 8px;
   }
 
   .col-xl {
+    -webkit-box-flex: 1;
+    -ms-flex-positive: 1;
     flex-grow: 1;
+    -ms-flex-preferred-size: 0;
     flex-basis: 0;
     max-width: 100%;
   }
 
   .col-xl-1 {
+    -ms-flex-preferred-size: 8.33333333%;
     flex-basis: 8.33333333%;
     max-width: 8.33333333%;
   }
 
   .col-xl-2 {
+    -ms-flex-preferred-size: 16.66666667%;
     flex-basis: 16.66666667%;
     max-width: 16.66666667%;
   }
 
   .col-xl-3 {
+    -ms-flex-preferred-size: 25%;
     flex-basis: 25%;
     max-width: 25%;
   }
 
   .col-xl-4 {
+    -ms-flex-preferred-size: 33.33333333%;
     flex-basis: 33.33333333%;
     max-width: 33.33333333%;
   }
 
   .col-xl-5 {
+    -ms-flex-preferred-size: 41.66666667%;
     flex-basis: 41.66666667%;
     max-width: 41.66666667%;
   }
 
   .col-xl-6 {
+    -ms-flex-preferred-size: 50%;
     flex-basis: 50%;
     max-width: 50%;
   }
 
   .col-xl-7 {
+    -ms-flex-preferred-size: 58.33333333%;
     flex-basis: 58.33333333%;
     max-width: 58.33333333%;
   }
 
   .col-xl-8 {
+    -ms-flex-preferred-size: 66.66666667%;
     flex-basis: 66.66666667%;
     max-width: 66.66666667%;
   }
 
   .col-xl-9 {
+    -ms-flex-preferred-size: 75%;
     flex-basis: 75%;
     max-width: 75%;
   }
 
   .col-xl-10 {
+    -ms-flex-preferred-size: 83.33333333%;
     flex-basis: 83.33333333%;
     max-width: 83.33333333%;
   }
 
   .col-xl-11 {
+    -ms-flex-preferred-size: 91.66666667%;
     flex-basis: 91.66666667%;
     max-width: 91.66666667%;
   }
 
   .col-xl-12 {
+    -ms-flex-preferred-size: 100%;
     flex-basis: 100%;
     max-width: 100%;
   }
@@ -1080,78 +1239,99 @@     margin-left: 91.66666667%;
   }
 
   .start-xl {
+    -webkit-box-pack: start;
+    -ms-flex-pack: start;
     justify-content: flex-start;
     text-align: start;
   }
 
   .center-xl {
+    -webkit-box-pack: center;
+    -ms-flex-pack: center;
     justify-content: center;
     text-align: center;
   }
 
   .end-xl {
+    -webkit-box-pack: end;
+    -ms-flex-pack: end;
     justify-content: flex-end;
     text-align: end;
   }
 
   .top-xl {
+    -webkit-box-align: start;
+    -ms-flex-align: start;
     align-items: flex-start;
   }
 
   .middle-xl {
+    -webkit-box-align: center;
+    -ms-flex-align: center;
     align-items: center;
   }
 
   .bottom-xl {
+    -webkit-box-align: end;
+    -ms-flex-align: end;
     align-items: flex-end;
   }
 
   .around-xl {
+    -ms-flex-pack: distribute;
     justify-content: space-around;
   }
 
   .between-xl {
+    -webkit-box-pack: justify;
+    -ms-flex-pack: justify;
     justify-content: space-between;
   }
 
   .first-xl {
+    -webkit-box-ordinal-group: 0;
+    -ms-flex-order: -1;
     order: -1;
   }
 
   .last-xl {
+    -webkit-box-ordinal-group: 2;
+    -ms-flex-order: 1;
     order: 1;
   }
 
   .initial-order-xl {
+    -webkit-box-ordinal-group: NaN;
+    -ms-flex-order: initial;
     order: initial;
   }
 }
 
-@media (--xs-only) {
+@media only screen and (max-width: 575px) {
   .hidden-xs {
     display: none;
   }
 }
 
-@media (--sm-only) {
+@media only screen and (min-width: 576px) and (max-width: 767px) {
   .hidden-sm {
     display: none;
   }
 }
 
-@media (--md-only) {
+@media only screen and (min-width: 768px) and (max-width: 991px) {
   .hidden-md {
     display: none;
   }
 }
 
-@media (--lg-only) {
+@media only screen and (min-width: 992px) and (max-width: 1199px) {
   .hidden-lg {
     display: none;
   }
 }
 
-@media (--xl-only) {
+@media only screen and (min-width: 1200px) {
   .hidden-xl {
     display: none;
   }