style.css?ver=5.4
.post-wrapper {
background: #fff;
box-shadow: 0 0 10px rgba(0,0,0,0.05);
margin: 0 auto;
max-width: 940px;
border-radius: 10px;
width: 100%;
overflow: hidden;
}
Changing or removing max-width sorts the width issue I think for you. Or you can test the removal of margin: 0 auto; as well
