Open responsive.css in Sublime Text.

Add the following media query:

@media screen and (min-width: 640px) {
  // add style rules here
}

Align the blog logo to the left-hand side, as follows:

.blog-name {
  text-align: left;
  margin-bottom: 0;
}

Display the list item of the navigation menu, post meta, and social media inline, as follows:

.blog-menu li,
.post-meta li,
.social-media li {
      display: inline;
}

Increase the post title size, as follows:

.post-title {
  font-size: 48px;
}

Also, display the blog pagination links inline, as follows:

.blog-pagination li,
.blog-pagination a {
  display: inline;
}

Put the pagination page indicator in its initial position—inline with the blog pagination link...