body { font-size: 1.15rem; line-height: 1.8; }
h1   { font-size: 2.4rem; }
h2   { font-size: 1.8rem; }
h3   { font-size: 1.4rem; }

.classroom-footer {
  display: flex;
  justify-content: space-between;
  padding: 1rem 2rem;
  border-top: 2px solid #FFD43B;
  font-size: 0.85rem;
  color: #718096;
  margin-top: 3rem;
}
.classroom-credit { color: #718096; text-decoration: none; font-weight: 700; }
.classroom-exit { color: #718096; text-decoration: none; opacity: 0.6; }
.classroom-exit:hover { opacity: 1; }