Fixed by separating user-select and box-sizing.
@ -14,11 +14,15 @@
clear: both;
}
*,
*:before,
*:after{
.box-sizing(border-box);
*:not(input),
*:not(input):before,
*:not(input):after {
-webkit-user-select: none;
-moz-user-select: none;
-ms-user-select: none;