themes-wordpress/karuna/assets/stylesheets/shared/_infinitescroll.scss

/* Globally hidden elements when Infinite Scroll is supported and in use. */
.infinite-scroll .posts-navigation, /* Older / Newer Posts Navigation (always hidden) */
.infinite-scroll.neverending .site-footer { /* Theme Footer (when set to scrolling) */
	display: none;
}

/* When Infinite Scroll has reached its end we need to re-display elements that were hidden (via .neverending) before. */
.infinity-end.neverending .site-footer {
	display: block;
}

#infinite-handle span {
	border: 2px solid;
	border-color: $color__border-button;
	border-radius: 10px;
	background: $color__background-button;
	box-shadow: none;
	color: $color__link;
	display: inline-block;
	font-weight: bold;
	margin-bottom: 1.6em;
	@include font-size(1);
	letter-spacing: 1px;
	line-height: 1;
	padding: .8em 1.6em .8em;
	text-shadow: none;
	text-decoration: none;
	text-transform: uppercase;
	transition: 0.3s;
	position: relative;
	left: 50%;
	transform: translateX(-50%);
	text-align: center;
}

#infinite-handle span button {
	transition: none;
}

.infinite-loader {
	width: 100%;

	.spinner {
		position: relative;
		left: 50%;
		transform: translateX(-50%);
	}
}