.submenu {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.5rem;
  background-color: #f4f4f4;
  padding: 1rem;
  border-radius: 8px;
  box-shadow: 0 2px 5px rgba(0,0,0,0.1);
  max-width: 100%;
  box-sizing: border-box;
}

.submenu a {
  text-decoration: none;
  padding: 0.4rem 0.8rem;
  border-radius: 5px;
  color: #333;
  background-color: #fff;
  transition: all 0.3s ease;
  font-weight: 500;
  border: 1px solid #ddd;
  font-size: 0.95rem;
  white-space: nowrap;
  flex-shrink: 0;
}

.submenu a:hover {
  background-color: #007acc;
  color: white;
  border-color: #007acc;
}

@media screen and (max-width: 600px) {
  .submenu {
    justify-content: flex-start;
  }
  .submenu a {
    font-size: 0.85rem;
    padding: 0.3rem 0.6rem;
  }
}