/* Menú de navegación: botón desplegable en pantallas estrechas (compartido por todas las páginas) */
.nav-toggle { display: none; }
@media (max-width: 760px) {
  .topbar, .header-row { position: relative; }
  .topbar { flex-wrap: nowrap; gap: 10px; }
  .topbar > div:last-child { width: auto; flex: 0 0 auto; }
  .topbar .brand { min-width: 0; flex: 1 1 auto; }
  .topbar .brand-mark, .topbar > .brand-mark { display: block; min-width: 0; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
  .nav-toggle {
    display: inline-flex; align-items: center; gap: 8px; height: 38px; padding: 0 14px;
    border-radius: 8px; border: 1px solid var(--border); background: var(--surface); color: var(--text);
    font: 600 0.9rem var(--sans); cursor: pointer; margin-left: 8px; white-space: nowrap;
  }
  .nav-toggle:focus-visible { outline: 2px solid var(--primary); outline-offset: 2px; }
  .nav-toggle-icon, .nav-toggle-icon::before, .nav-toggle-icon::after {
    display: block; width: 16px; height: 2px; border-radius: 2px; background: currentColor; position: relative;
    transition: transform 0.2s ease, opacity 0.2s ease;
  }
  .nav-toggle-icon::before, .nav-toggle-icon::after { content: ""; position: absolute; left: 0; }
  .nav-toggle-icon::before { top: -5px; }
  .nav-toggle-icon::after { top: 5px; }
  .nav-toggle[aria-expanded="true"] .nav-toggle-icon { background: transparent; }
  .nav-toggle[aria-expanded="true"] .nav-toggle-icon::before { transform: translateY(5px) rotate(45deg); }
  .nav-toggle[aria-expanded="true"] .nav-toggle-icon::after { transform: translateY(-5px) rotate(-45deg); }
  #siteNav { display: none; }
  #btnPdf .btn-label { display: none; }
  #btnPdf { padding-left: 10px; padding-right: 10px; }
  #siteNav.is-open {
    display: flex; flex-direction: column; align-items: stretch; gap: 2px;
    position: absolute; top: 100%; left: 0; right: 0; z-index: 80; width: auto; order: 0;
    margin: 0; padding: 8px 16px 14px; overflow: visible; border-radius: 0;
    background: var(--surface); border-bottom: 1px solid var(--border);
    box-shadow: 0 12px 24px rgba(20, 22, 50, 0.12);
  }
  #siteNav.is-open a { display: block; white-space: normal; padding: 12px 14px; font-size: 1rem; border-radius: 8px; }
  .header-row #siteNav.is-open { top: calc(100% + 8px); border: 1px solid var(--border); border-radius: 16px; left: 16px; right: 16px; }
  .header-row .nav-toggle { margin-left: auto; margin-right: 8px; height: 38px; border-radius: 200px; }
}
@media (prefers-reduced-motion: reduce) {
  .nav-toggle-icon, .nav-toggle-icon::before, .nav-toggle-icon::after { transition: none; }
}

/* iOS amplía la página al tocar campos con letra de menos de 16 px: se evita en pantallas estrechas */
@media (max-width: 760px) {
  select, textarea, input:not([type="checkbox"]):not([type="radio"]) { font-size: 16px !important; }
}