Index: lams_central/web/signup/loginTab.jsp
===================================================================
diff -u -r4c2d1f37b92435907ec4ce23cb635a7cd9e4161e -re2956cb8a072cc5ac9ceabaa9dac30c5750bf10b
--- lams_central/web/signup/loginTab.jsp	(.../loginTab.jsp)	(revision 4c2d1f37b92435907ec4ce23cb635a7cd9e4161e)
+++ lams_central/web/signup/loginTab.jsp	(.../loginTab.jsp)	(revision e2956cb8a072cc5ac9ceabaa9dac30c5750bf10b)
@@ -7,7 +7,7 @@
 		<div class="container">
 			<div class="row vertical-center-row">
 				<div
-					class="col-xs-12 col-sm-8 col-sm-offset-2 col-md-6 col-md-offset-3">
+					class="col-12 col-md-8 offset-md-2 col-lg-6 offset-lg-3">
 					<div class="panel">
 						<div class="panel-body">
 							<div class="form-group">
@@ -29,7 +29,7 @@
 								<lams:errors path="courseKeyTab2"/>
 							</div>
 							<div class="form-group" align="right">
-								<button class="btn btn-sm btn-default voffset5">
+								<button class="btn btn-sm btn-secondary voffset5">
 									<fmt:message key="login.submit" />
 								</button>
 							</div>