Hi Benny,
.btn is a Bootstrap style, but .btn-custom-orange is not. You either slap those classes to all input buttons in the template files inside your child theme, which is an awfully big job, or copy the styles of the .btn and .btn-custom-orange classes and apply them to the submit buttons in the CSS document of your child theme. I tried to mix both these classes inside a single CSS declaration and got this result, but I didn’t have time to test it (I’m about to leave for a few days’ vacation), but you can test it yourself and tweak it as necessary. Here it is:
.menu-toggle,
input[type="submit"],
input[type="button"],
input[type="reset"],
article.post-password-required input[type="submit"],
.bypostauthor cite span {
background-color: hsl(33, 100%, 39%) !important;
background-repeat: repeat-x;
display: inline-block;
*display: inline;
filter: progid:DXImageTransform.Microsoft.gradient(startColorstr="#fea02d", endColorstr="#c66d00");
background-image: -khtml-gradient(linear, left top, left bottom, from(#fea02d), to(#c66d00));
background-image: -moz-linear-gradient(top, #fea02d, #c66d00);
background-image: -ms-linear-gradient(top, #fea02d, #c66d00);
background-image: -webkit-gradient(linear, left top, left bottom, color-stop(0%, #fea02d), color-stop(100%, #c66d00));
background-image: -webkit-linear-gradient(top, #fea02d, #c66d00);
background-image: -o-linear-gradient(top, #fea02d, #c66d00);
background-image: linear-gradient(#fea02d, #c66d00);
border-color: #c66d00 #c66d00 hsl(33, 100%, 34%);
border-radius: 0;
box-shadow: none;
color: #fff !important;
margin-bottom: 0;
*margin-left: .3em;
font-size: 14px;
line-height: 20px;
text-align: center;
vertical-align: middle;
text-indent: 0;
-webkit-border-radius: 4px;
-moz-border-radius: 4px;
border-radius: 4px;
padding: 4px 12px;
text-shadow: 0 -1px 0 rgba(0, 0, 0, 0.33);
-webkit-font-smoothing: antialiased;
-moz-osx-font-smoothing: grayscale;
}
It’s quite a big chunk and it applies to all buttons. If anything doesn’t look quite right, try tweaking the values.
I hope this helps ??