main {
  height: 100vh;
}

ul {
  list-style: none;
  padding: 0;
}

main > ul {
  display: flex;
  flex: 1;
  gap: 1rem;
  flex-wrap: wrap;
  align-items: flex-start;
  margin: 0 1rem;
  border: 3px solid var(--background-color);
}

li {
  flex: 1;
  height: 100%;
  margin: 0;
  color: var(--background-color);
}

main > ul > li:first-child {
  margin-left: 1rem;
}

main > ul > li:last-child {
  margin-right: 1rem;
}

main > ul > li:not(:last-child) {
  padding-right: 1rem;
  border-right: 3px solid var(--background-color);
  border-radius: 0;
}

header {
  padding: 0.5rem;
  border: solid 2px var(--background-color);
  margin-top: 1rem;
}

section {
  margin: 1rem 0;
}

section ul {
  padding: 1rem;
}

h5 {
  margin-bottom: 0;
  background-color: var(--background-color);
  color: var(--color);
  padding: 0.35rem;
}

.blue-bin {
  margin-top: 1rem;
  border: 3px solid var(--background-color);
  height: 60px;
  display: flex;
  justify-content: center;
  align-items: center;
}