/* ===============================
   Responsive CSS
   =============================== */

/* Mobile First (max 600px) */
@media (max-width: 600px) {
  header {
    flex-direction: column;
    align-items: flex-start;
    padding: 0.5rem;
  }

  nav .menu-toggle {
    display: block;
  }

  nav ul {
    display: none;
  }

  .categories {
    grid-template-columns: 1fr; /* single column on small screens */
  }

  .card {
    flex-direction: row;
    align-items: center;
    text-align: left;
  }

  .articles {
    grid-template-columns: 1fr;
  }

  .footer-content {
    flex-direction: column;
    text-align: center;
  }

  .footer-links {
    margin-bottom: 1rem;
  }
}

/* Tablets (601px – 1024px) */
@media (min-width: 601px) and (max-width: 1024px) {
  .categories {
    grid-template-columns: repeat(2, 1fr);
  }

  .articles {
    grid-template-columns: repeat(2, 1fr);
  }

  header {
    flex-direction: row;
    justify-content: space-between;
  }
}

/* Large Screens (1025px+) */
@media (min-width: 1025px) {
  .categories {
    grid-template-columns: repeat(4, 1fr);
  }

  .articles {
    grid-template-columns: repeat(3, 1fr);
  }
}