/* ============================================
   ETRINASOLAR.COM — Responsive Stylesheet
   Breakpoints: 1024px, 768px, 480px
   ============================================ */

/* ---- Tablet ---- */
@media (max-width: 1024px) {
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 2rem; }
  .footer-brand { grid-column: 1 / -1; }
  .blog-layout { grid-template-columns: 1fr; }
  .sidebar { position: static; }
  .hero-grid { gap: 2.5rem; }
  .contact-layout { grid-template-columns: 1fr; gap: 2.5rem; }
}

/* ---- Mobile Landscape ---- */
@media (max-width: 900px) {
  .hero-grid { grid-template-columns: 1fr; text-align: center; }
  .hero p { margin: 0 auto 2rem; }
  .hero-cta { justify-content: center; }
  .hero-visual { display: none; }
  .process-steps { grid-template-columns: repeat(2, 1fr); }
}

/* ---- Mobile ---- */
@media (max-width: 768px) {
  :root { font-size: 15px; }

  .site-nav { display: none; }
  .site-nav.open {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: 72px;
    left: 0;
    right: 0;
    background: var(--clr-surface);
    border-bottom: 1px solid var(--clr-border);
    padding: 1rem;
    gap: 0.25rem;
    z-index: 999;
    box-shadow: var(--shadow-md);
  }
  .site-nav.open a { border-radius: var(--radius-sm); padding: 0.75rem 1rem; }
  .menu-toggle { display: flex; }
  #site-header { position: sticky; }

  .header-inner { position: relative; }

  .section { padding: 3.5rem 0; }
  .hero { padding: 4rem 0 3rem; }

  .posts-grid { grid-template-columns: 1fr; }
  .benefits-grid { grid-template-columns: 1fr 1fr; }
  .testimonials-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; }
  .footer-bottom { flex-direction: column; text-align: center; }
  .footer-legal { justify-content: center; }

  .cta-banner { padding: 2rem; margin: 0; border-radius: var(--radius-lg); }
  .form-row { grid-template-columns: 1fr; }
  .contact-layout { grid-template-columns: 1fr; }
  .process-steps { grid-template-columns: 1fr; }
  .values-grid { grid-template-columns: 1fr 1fr; }
  .team-grid { grid-template-columns: 1fr; }

  .article-author-box { flex-direction: column; }
}

/* ---- Small Mobile ---- */
@media (max-width: 480px) {
  :root { font-size: 14px; }
  .benefits-grid { grid-template-columns: 1fr; }
  .hero-cta { flex-direction: column; align-items: center; }
  .newsletter-form { flex-direction: column; align-items: stretch; }
  .newsletter-form input[type="email"] { min-width: 0; }
  .values-grid { grid-template-columns: 1fr; }
  .header-actions .btn { display: none; }
  #back-top { bottom: 1rem; right: 1rem; }
  .data-table { font-size: 0.8rem; }
  .data-table th, .data-table td { padding: 0.6rem 0.7rem; }
}

/* ---- Print ---- */
@media print {
  #site-header, #site-footer, #back-top, .ad-slot, .newsletter-section { display: none; }
  body { background: #fff; color: #000; }
  .article-content { max-width: 100%; }
}