.nav-button:hover {
  background: #ffe0b2;
  transform: scale(1.05);
}

.nav-button {
  background: linear-gradient(to right, #ffcc80, #ffb74d);
  color: #4e342e;
  text-decoration: none;
  padding: 10px 20px;
  font-size: 16px;
  font-weight: bold;
  border-radius: 25px;
  border: 2px solid #d4af37;
  transition: all 0.3s ease;
  box-shadow: 0 4px 8px rgba(0,0,0,0.1);
}

.chapter-navigation {
  display: flex;
  justify-content: space-between;
  margin-top: 30px;
}