* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
}

body {
  font-family: system-ui, sans-serif;
  line-height: 1.5;
}

main {
  max-width: 900px;
  margin: 0 auto;
  padding: 40px 24px;
}

a {
  color: inherit;
}

header {
  margin-bottom: 40px;
}

header h1 {
  margin: 0;
}

.photos {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 24px;
}

.photos > div {
  min-width: 0;
  aspect-ratio: 1 / 1;
  display: grid;
  place-items: center;
  background: #ddd;
}

@media (max-width: 600px) {
  main {
    padding: 24px 16px;
  }

  header {
    margin-bottom: 24px;
  }

  .photos {
    grid-template-columns: 1fr;
    gap: 16px;
  }
}