.header {
    position: relative;
    transition: all 0.3s ease;
}
.header.fixed {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
}

.entry-content img {
    margin: 0 auto;
    width: 100%;
    object-fit: contain;
    max-height: 400px;
}