h1 {
  font-size: larger;
  font-weight: bold;
  padding: 1em;
}
h2 {
  font-size: larger;
  font-weight: bold;
}
div.boxes-container {
  display: flex;
  flex-wrap: wrap;
}
div.boxes-container > div {
  border: 1px solid black;
  padding: 0.2em;
  margin: 0.2em;
}

img {
  max-width: auto;
  max-height: 1em;
}