GP actually has no control over that content so would require CSS – give this a try:
.wpcap-grid-container .post-grid-thumbnail img {
width: 100%;
}
.wpcap-post .post-grid-inner {
position: relative;
}
.elementor-widget-elementor-blog-posts .wpcap-grid .wpcap-grid-container .wpcap-post .title {
position: absolute;
top: 20px;
left: 20px;
}
.elementor-widget-elementor-blog-posts .wpcap-grid .wpcap-grid-container .wpcap-post .title a {
font-size: 20px;
color: #fff;
}