1. Add this code snippet to your desired resolution Custom CSS area to change the Alternative category title font size on this resolution. Code placement example https://gyazo.com/b131469705126af73e8c20432f87ecb3

body .cat-design-alt .hover-mask > h3 {
	font-size: 20px;
}

2. Same as previous for Categories Design Center.

body .cat-design-center .hover-mask >h3 {
	font-size: 15px;
}

3. Use this code snippet instead previous, to place title at the bottom. You can adjust position more precise by editing string bottom: 20px;.

.cat-design-center .hover-mask > h3 {
    display: table;
    background-color: rgba(255,255,255,0.7);
    padding: 20px;
    transition: all 0.3s ease;
    -webkit-transition: all 0.3s ease;
}

.cat-design-center:hover .hover-mask > h3 {
	padding-bottom: 30px;
}

.cat-design-center .hover-mask > a:last-child {
	margin-bottom: 0;
	margin-top: -30px;
	color: rgba(0,0,0,0.8);
	z-index: 20;
}

.cat-design-center .hover-mask > a:last-child:hover {
	color: black;
}

body .cat-design-center .hover-mask {
	top: auto;
	bottom: 20px;
}

@media (max-width: 991px) {
body .cat-design-center:hover .hover-mask > h3 {
	padding-bottom: 20px;
}
	
.cat-design-center .hover-mask > a:last-child {
	color: black;
}
	
.cat-design-center .hover-mask > a:last-child {
	display: none;
}
}

@media (max-width: 767px) {
body div.categories-masonry .cat-design-center .category-content .hover-mask > h3 {		
	padding: 10px;
}
}

Regards