* {
  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;
  gap: 1em;
  flex-direction: column;
}

.media-card {
    display: flex;
    flex-direction: column;
    gap: 1em;
}

.gallery {
    display: flex;
    flex-wrap: wrap;
    gap: 1em;
    justify-content: center;
}

.gallery > * {
    flex: 1 1 460px;
}

hr {
  margin-top: 50px;
}

@media screen and (min-width: 550px) {
    .main-nav {
        flex-direction: row;
        justify-content: flex-end;
    }
    .media-card {
        flex-direction: row;
    }
    .media-card-image {
        flex: 0 1 250px;
    }
    .media-card-content {
        flex: 0 1 60ch;
    }
}