/* ==========================================================================
   NERALYS — Responsive
   Breakpoints : Desktop (>1200px, défaut dans style.css), Laptop (≤1200px),
   Tablette (≤900px), Mobile (≤600px)
   ========================================================================== */

/* Laptop ------------------------------------------------------------------ */
@media (max-width: 1200px) {
  .container { padding: 0 20px; }
  .grid-regions { grid-template-columns: repeat(3, 1fr); gap: 18px; }
  .card-grid-3 { gap: 20px; }
  .footer-grid { grid-template-columns: 1.2fr 1fr 1fr; }
  .footer-grid .footer-col:nth-child(3) { grid-column: 3; }
}

/* Tablette ------------------------------------------------------------------ */
@media (max-width: 900px) {
  :root { --header-h: 78px; --header-h-compact: 60px; }

  .main-nav { display: none; }
  .nav-toggle { display: flex; }

  .hero { min-height: 84vh; }
  .hero-stats { grid-template-columns: repeat(2, 1fr); max-width: 340px; }

  .grid-regions { grid-template-columns: repeat(2, 1fr); }
  .card-grid-3 { grid-template-columns: 1fr; }
  .choice-cards { grid-template-columns: 1fr; }
  .compare-grid { grid-template-columns: 1fr; }
  .steps-grid { grid-template-columns: repeat(2, 1fr); gap: 30px 20px; }
  .stats-band { grid-template-columns: repeat(2, 1fr); gap: 30px 20px; }
  .testi-grid { grid-template-columns: 1fr; max-width: 480px; margin: 0 auto; }

  .field-row, .field-row--3 { grid-template-columns: 1fr 1fr; }
  .option-grid { grid-template-columns: repeat(2, 1fr); }

  .footer-grid { grid-template-columns: 1fr 1fr; gap: 34px 24px; }
  .contact-grid { grid-template-columns: 1fr; }

  .section { padding: 64px 0; }
}

/* Mobile ------------------------------------------------------------------ */
@media (max-width: 600px) {
  :root { --header-h: 70px; --header-h-compact: 56px; }

  .brand img { height: 46px; }
  .site-header.is-scrolled .brand img { height: 36px; }

  .hero { min-height: 96vh; padding-top: calc(var(--header-h) + 10px); }
  .hero-content { padding: 30px 0; }
  .hero .lead { font-size: 1rem; }
  .hero-actions { flex-direction: column; }
  .hero-actions .btn { width: 100%; }
  .hero-stats { grid-template-columns: repeat(2, 1fr); gap: 16px; }

  .hero--page { align-items: center; text-align: left; padding-bottom: 40px; }

  .grid-regions { grid-template-columns: 1fr; }
  .region-card { height: 210px; }

  .steps-grid { grid-template-columns: 1fr; }
  .stats-band { grid-template-columns: repeat(2, 1fr); }
  .stats-band strong { font-size: 1.7rem; }

  .field-row, .field-row--3 { grid-template-columns: 1fr; gap: 0; }
  .option-grid { grid-template-columns: repeat(2, 1fr); }

  .form-panel { padding: 22px; }
  .form-nav { flex-direction: column-reverse; }

  .footer-grid { grid-template-columns: 1fr; gap: 30px; }
  .footer-bottom { flex-direction: column; text-align: center; }

  .section { padding: 52px 0; }
  .cta-band { padding: 56px 0; }

  .back-to-top { right: 14px; bottom: 14px; width: 44px; height: 44px; }
}