.page-header {
    padding-top: 30px;
    padding-bottom: 10px;
    background-color: #f5f5f5;
}
.page-header h1 {
    margin-bottom: 0;
}
.page-header h2 {
    margin-top: 0;
    color: #555;
}

.page-footer {
    background-color: #f5f5f5;
    padding: 30px;
}

.posts img {
    max-width:100%;
}
.posts .ui.grid {
    margin: 0;
}
.posts .image-column {
    background-position: center;
    background-size: cover;
}