fix home navbar on mobile

assets/css/bootswatch.min.css

-body{padding-top:50px}body>.navbar{-webkit-transition:background-color 300ms ease-in;transition:background-color 300ms ease-in}body>.navbar-transparent{background-color:transparent}body>.navbar-transparent .navbar-nav>.open>a{background-color:transparent !important}#home{padding-top:0}#home .navbar-brand{padding:13.5px 15px 12.5px}#home .navbar-brand>img{display:inline;margin:0 8px;height:100%}#banner{min-height:300px;border-bottom:none}.page-header h1{font-size:4em}.bs-docs-section{margin-top:8em}.bs-component{position:relative}.bs-component .modal{position:relative;top:auto;right:auto;left:auto;bottom:auto;z-index:1;display:block}.bs-component .modal-dialog{width:90%}.bs-component .popover{position:relative;display:inline-block;width:220px;margin:20px}#source-button{position:absolute;top:0;right:0;z-index:100;font-weight:bold}.nav-tabs{margin-bottom:15px}.progress{margin-bottom:10px}footer{margin:5em 0}footer li{float:left;margin-right:1.5em;margin-bottom:1.5em}footer p{clear:left;margin-bottom:0}.splash{padding:9em 0 2em;background-color:#141d27;background-image:url(../img/bg.jpg);background-size:cover;background-attachment:fixed;color:#fff;text-align:center}.splash .logo{width:160px}.splash h1{font-size:3em}.splash #social{margin:2em 0}.splash .alert{margin:2em 0}.section-tout{padding:4em 0 3em;border-bottom:1px solid rgba(0,0,0,0.05);background-color:#eaf1f1}.section-tout .fa{margin-right:.5em}.section-tout p{margin-bottom:3em}.section-preview{padding:4em 0 4em}.section-preview .preview{margin-bottom:4em;background-color:#eaf1f1}.section-preview .preview .image{position:relative}.section-preview .preview .image:before{box-shadow:inset 0 0 0 1px rgba(0,0,0,0.1);position:absolute;top:0;left:0;width:100%;height:100%;content:"";pointer-events:none}.section-preview .preview .options{padding:1em 2em 2em;border:1px solid rgba(0,0,0,0.05);border-top:none;text-align:center}.section-preview .preview .options p{margin-bottom:2em}.section-preview .dropdown-menu{text-align:left}.section-preview .lead{margin-bottom:2em}@media (max-width:767px){.section-preview .image img{width:100%}}.sponsor{text-align:center}.sponsor a:hover{text-decoration:none}@media (max-width:767px){.splash{padding-top:4em}.splash .logo{width:100px}.splash h1{font-size:2em}#banner{margin-bottom:2em;text-align:center}}
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+body{padding-top:50px}body>.navbar{-webkit-transition:background-color 300ms ease-in;transition:background-color 300ms ease-in}@media (min-width:768px){body>.navbar-transparent{background-color:transparent}body>.navbar-transparent .navbar-nav>.open>a{background-color:transparent!important}}#home{padding-top:0}#home .navbar-brand{padding:13.5px 15px 12.5px}#home .navbar-brand>img{display:inline;margin:0 10px;height:100%}#banner{min-height:300px;border-bottom:none}.page-header h1{font-size:4em}.bs-docs-section{margin-top:8em}.bs-component{position:relative}.bs-component .modal{position:relative;top:auto;right:auto;left:auto;bottom:auto;z-index:1;display:block}.bs-component .modal-dialog{width:90%}.bs-component .popover{position:relative;display:inline-block;width:220px;margin:20px}#source-button{position:absolute;top:0;right:0;z-index:100;font-weight:700}.nav-tabs{margin-bottom:15px}.progress{margin-bottom:10px}footer{margin:5em 0}footer li{float:left;margin-right:1.5em;margin-bottom:1.5em}footer p{clear:left;margin-bottom:0}.splash{padding:9em 0 2em;background-color:#141d27;background-image:url(../img/bg.jpg);background-size:cover;background-attachment:fixed;color:#fff;text-align:center}.splash .logo{width:160px}.splash h1{font-size:3em}.splash #social{margin:2em 0}.splash .alert{margin:2em 0}.section-tout{padding:4em 0 3em;border-bottom:1px solid rgba(0,0,0,.05);background-color:#eaf1f1}.section-tout .fa{margin-right:.5em}.section-tout p{margin-bottom:3em}.section-preview{padding:4em 0 4em}.section-preview .preview{margin-bottom:4em;background-color:#eaf1f1}.section-preview .preview .image{position:relative}.section-preview .preview .image:before{box-shadow:inset 0 0 0 1px rgba(0,0,0,.1);position:absolute;top:0;left:0;width:100%;height:100%;content:"";pointer-events:none}.section-preview .preview .options{padding:1em 2em 2em;border:1px solid rgba(0,0,0,.05);border-top:none;text-align:center}.section-preview .preview .options p{margin-bottom:2em}.section-preview .dropdown-menu{text-align:left}.section-preview .lead{margin-bottom:2em}@media (max-width:767px){.section-preview .image img{width:100%}}.sponsor{text-align:center}.sponsor a:hover{text-decoration:none}@media (max-width:767px){.splash{padding-top:4em}.splash .logo{width:100px}.splash h1{font-size:2em}#banner{margin-bottom:2em;text-align:center}}
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assets/less/bootswatch.less

 body {
-    padding-top: 50px;
+  padding-top: 50px;
+
   > .navbar {
     -webkit-transition: background-color 300ms ease-in;
     transition: background-color 300ms ease-in;
   }
-  > .navbar-transparent {
-    background-color: transparent;
-    .navbar-nav > .open > a {
-      background-color: transparent !important;
+}
+
+@media (min-width: 768px) {
+  body {
+    > .navbar-transparent {
+      background-color: transparent;
+
+      .navbar-nav > .open > a {
+        background-color: transparent !important;
+      }
     }
   }
 }