* {
  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;
  justify-content: flex-end;
  background-color: lightblue;
  padding: 40px;
}

hr {
  margin-top: 50px;
}

.media-card {
  display: flex;
  flex-direction: column;
  gap: 40px;
}

.gallery {
  display: flex;
  gap: 20px;
  flex-wrap: wrap;
  justify-content: center;
}

.gallery > * {
  flex: 0 1 460px;
}

@media screen and (min-width: 700px) {
  .main-nav {
    flex-direction: row;
  }
  .main-nav li {
    flex: 0 1 5em;
  }
  .media-card {
    flex-direction: row;
  }
  .gallery > * {
    flex: 0 1 460px;
  }
  .media-card-image {
    flex: 1 1 300px;
  }
  .media-card-content {
    flex: 0 1 60ch;
  }
}