.grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 10px;
}

.card-link {
  display: block;
  text-decoration: none;
  color: #333;
  /* background: #f9f9f9; */
  padding: 6px 10px;
  border-radius: 5px;
  line-height: 1.4;
  min-height: 38px;
  /* border: 1px solid #e0e0e0; */
}

    /* .card-link:hover {
      background: #e0e0e0;
    } */

.letter-group {
    margin-bottom: 40px;
}

.letter-group h2 {
  margin-bottom: 10px;
}

.letter-group .grid {
  margin: 0;
  padding: 0;
}

/* Mobile específico */
@media (max-width: 576px) {
  main.container {
    padding-left: 1rem !important;
    padding-right: 1rem !important;
    margin-top: 20px;
  }
  
  .section-title {
    font-size: 1.5rem;
  }
  
  .letter-group h2 {
    font-size: 1.3rem;
  }
  
  .grid {
    grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
    gap: 0.75rem;
  }

  .card-link {
    padding: 0.5rem 0.8rem;
    font-size: 0.9rem;
  }
}