/* ============================================================
   responsive.css — Breakpoints y ajustes mobile-first
   Breakpoints: sm 480 | md 768 | lg 1024 | xl 1200
   ============================================================ */

/* ---- Grids ------------------------------------------------ */
@media (max-width: 1024px) {
  .grid-4  { grid-template-columns: repeat(2, 1fr); }
  .grid-3  { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 768px) {
  .grid-2,
  .grid-3,
  .grid-4  { grid-template-columns: 1fr; }

  .form-row { grid-template-columns: 1fr; }
}

/* ---- Navegación principal --------------------------------- */
@media (max-width: 768px) {
  .nav-links {
    position: fixed; inset: 0 0 0 30%;
    background: var(--color-surface);
    flex-direction: column;
    padding: 5rem 2rem 2rem;
    gap: 1.5rem;
    transform: translateX(100%);
    transition: transform .3s ease;
    z-index: 999;
    box-shadow: var(--shadow-lg);
  }
  .nav-links.open { transform: translateX(0); }
  .nav-links a { font-size: 1.1rem; }

  .nav-toggle {
    display: flex !important;
    flex-direction: column;
    gap: 5px;
    cursor: pointer;
    padding: .5rem;
    background: none;
    border: none;
    z-index: 1001;
  }
  .nav-toggle span {
    display: block; width: 24px; height: 2px;
    background: var(--color-text); border-radius: 2px;
    transition: transform .3s, opacity .3s;
  }
  .nav-toggle.open span:nth-child(1) { transform: rotate(45deg) translate(5px, 5px); }
  .nav-toggle.open span:nth-child(2) { opacity: 0; }
  .nav-toggle.open span:nth-child(3) { transform: rotate(-45deg) translate(5px, -5px); }

  .nav-overlay {
    display: block !important;
    position: fixed; inset: 0;
    background: rgba(0,0,0,.4);
    z-index: 998;
    opacity: 0; visibility: hidden;
    transition: opacity .3s;
  }
  .nav-overlay.open { opacity: 1; visibility: visible; }
}

.nav-toggle  { display: none; }
.nav-overlay { display: none; }

/* ---- Admin sidebar ---------------------------------------- */
@media (max-width: 1024px) {
  .admin-layout   { flex-direction: column; }
  .admin-sidebar  { width: 100%; min-width: 0; height: auto; position: static; flex-direction: row; flex-wrap: wrap; }
  .admin-sidebar-logo { padding: 1rem 1.25rem; }
  .admin-nav-section  { display: none; }
  .admin-nav-item     { padding: .6rem 1rem; font-size: .82rem; }
  .admin-content      { padding: 1.25rem; }
}

/* ---- Carrito --------------------------------------------- */
@media (max-width: 768px) {
  .cart-layout { flex-direction: column; }
  .cart-table thead { display: none; }
  .cart-table, .cart-table tbody, .cart-table tr, .cart-table td {
    display: block; width: 100%;
  }
  .cart-table tr { border: 1px solid var(--color-border); border-radius: var(--radius-md); margin-bottom: .75rem; padding: .5rem; }
  .cart-table td { border: none; padding: .4rem .6rem; }
  .cart-table td::before {
    content: attr(data-label);
    font-size: .75rem; text-transform: uppercase; letter-spacing: .5px;
    color: var(--color-muted); display: block; font-weight: 700; margin-bottom: 2px;
  }
}

/* ---- Tarjetas de producto --------------------------------- */
@media (max-width: 480px) {
  .product-card__title { font-size: .9rem; }
  .btn { padding: .55rem 1.1rem; font-size: .88rem; }
}

/* ---- Sección hero ---------------------------------------- */
.hero { padding: 5rem 0 3rem; }
.hero-content { max-width: 560px; }

@media (max-width: 768px) {
  .hero { padding: 3rem 0 2rem; text-align: center; }
  .hero-content { max-width: 100%; }
  .hero-actions { justify-content: center; }
}

/* ---- Modal ----------------------------------------------- */
@media (max-width: 480px) {
  .modal { border-radius: var(--radius-md) var(--radius-md) 0 0; max-height: 95vh; }
  .modal-overlay { align-items: flex-end; padding: 0; }
}

/* ---- Tabla admin responsive ------------------------------ */
@media (max-width: 768px) {
  .admin-table { font-size: .8rem; }
  .admin-table th:nth-child(n+4),
  .admin-table td:nth-child(n+4) { display: none; }
  .admin-content { padding: 1rem; }
  .admin-topbar  { flex-direction: column; align-items: flex-start; gap: .75rem; }
}

/* ---- Stat cards ------------------------------------------ */
@media (max-width: 600px) {
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .stat-value { font-size: 1.4rem; }
}

/* ---- Utilidades ------------------------------------------ */
@media (max-width: 768px) {
  .hide-mobile  { display: none !important; }
  .section      { padding-block: 2.5rem; }
  .container    { padding-inline: 1rem; }
}
@media (min-width: 769px) {
  .show-mobile-only { display: none !important; }
}