This is what i need and I did the same. Better if you can include such small CSS tweaks in next version.
.post-navigation {
font-size: 15px;
margin-bottom: 10px !important;
}
.post-navigation .nav-previous {
float: left;
}
.post-navigation .nav-next {
float: right;
}
.post-navigation .nav-previous,
.post-navigation .nav-next {
padding: 5px 10px;
border: 1px solid #ccc;
border-radius: 5px;
}
@media (max-width:768px) {
.post-navigation {
text-align: center;
}
.post-navigation .nav-previous,
.post-navigation .nav-next {
float: none;
margin-bottom: 7px;
}
}