* {
box-sizing: border-box;
}
body {
font-size: 20px;
max-width: 1280px;
margin: auto;
padding: 1em;
}
img {
max-width: 100%;
}
.main-nav {
list-style-type: none;
display: flex;
flex-direction: row;
justify-content: flex-end;
}
hr{
margin-top: 50px;
}
nav a {
    padding: 20px;
}
.gallery {
    display: flex;
    flex-direction: column;
    gap: 20px;
}
              
@media (min-width: 768px) {
    .gallery {
        display: flex;
        flex-direction: row;
        flex-wrap: wrap;
        gap: 20px;
    }

    .gallery .media-card {
        flex: 1 0 calc(50% - 10px);
    }
}

@media (min-width: 1200px) {

}