/* ==========================================================================
   Pool-Lab - Responsive Styles (Mobile First)
   ========================================================================== */

/* --- Mobile: < 768px --- */
@media (max-width: 767px) {
  .nav__toggle { display: flex; }
  .nav__list {
    position: fixed;
    top: 0;
    right: -100%;
    width: 280px;
    height: 100vh;
    background: var(--primary);
    flex-direction: column;
    padding: 90px 20px 24px;
    gap: 6px;
    align-items: stretch;
    box-shadow: -4px 0 30px rgba(0,0,0,0.3);
    transition: right 0.3s ease;
    z-index: 400;
    overflow-y: auto;
  }
  body.nav-open .nav__list { right: 0; }
  body.nav-open .header { z-index: 500; }
  body.nav-open::after {
    content: '';
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,0.5);
    z-index: 350;
  }
  .nav__link {
    padding: 16px 20px;
    font-size: 0.95rem;
    color: rgba(255,255,255,0.85);
    border-radius: 8px;
    transition: background 0.2s ease, color 0.2s ease;
  }
  .nav__link:hover {
    color: var(--accent);
    background: rgba(255,255,255,0.05);
  }
  .nav__cta { margin: 24px 0 0; text-align: center; justify-content: center; }

  /* Dropdown mobile */
  .nav__item--dropdown:hover > .nav__submenu { display: none; }
  .nav__submenu {
    position: static;
    box-shadow: none;
    background: rgba(255,255,255,0.03);
    border-radius: var(--radius-sm);
    margin: 2px 0 6px 8px;
    padding: 4px 0;
    min-width: auto;
    animation: none;
    border-left: 2px solid var(--accent);
  }
  .nav__item--dropdown > .nav__submenu.open { display: block; }
  .nav__submenu-link {
    color: rgba(255,255,255,0.6);
    font-size: 0.85rem;
    padding: 10px 14px;
    overflow-wrap: break-word;
    transition: padding-left 0.2s ease, color 0.2s ease;
  }
  .nav__submenu-link:hover {
    color: var(--accent);
    padding-left: 18px;
  }

  .page-hero { padding: 120px 0 40px; }
  .page-hero h1 { font-size: 1.8rem; }
  .services-teaser__grid { grid-template-columns: repeat(2, 1fr); }
  .services-hub__grid { grid-template-columns: 1fr; }
  .other-services__grid { grid-template-columns: repeat(2, 1fr); }
  .contact-teaser { padding: 60px 0; }
  .service-cta { padding: 60px 0; }
  .service-why { padding: 60px 0; }
  .service-norms { padding: 60px 0; }
  .other-services { padding: 60px 0; }
  .products__grid { grid-template-columns: 1fr; }
  .hero { min-height: 70vh; }
  .hero__title { font-size: 2rem; }
  .hero__title br { display: none; }
  .hero__subtitle { font-size: 1rem; }
  .hero__actions { flex-direction: column; align-items: center; }
  .btn-lg { padding: 14px 32px; }

  .hero__stat { padding: 16px 8px; }
  .hero__stat-number { font-size: 1.5rem; }
  .hero__stat-label { font-size: 0.65rem; letter-spacing: 0.5px; }

  .about { padding: 60px 0; }
  .about__grid { grid-template-columns: 1fr; gap: 32px; }
  .about__image { order: -1; }
  .section-title { font-size: 1.75rem; }

  .segments { padding: 80px 0; }
  .segments__content { max-width: 100%; }
  .segments__badge { top: 20px; right: 20px; width: 105px; height: 105px; }
  .segments__badge strong { font-size: 1.5rem; }
  .segments__badge span { font-size: 0.6rem; }
  .segments__grid { grid-template-columns: 1fr; gap: 32px; }
  .segments__image { order: -1; }

  .spinning-badge { width: 90px; height: 90px; top: -20px; right: -20px; }
  .spinning-badge__center { margin: 15px; }
  .spinning-badge__center strong { font-size: 1.2rem; }
  .spinning-badge__center span { font-size: 0.6rem; }

  .services { padding: 60px 0; }
  .services__badge {
    position: static;
    width: 120px;
    height: 120px;
    margin: -210px 20px 20px auto;
    border-radius: 50%;
  }
  .services__badge strong { font-size: 1.5rem; }
  .services__badge span { font-size: 0.6rem; }
  .services-details { gap: 48px; }
  .service-detail__grid { grid-template-columns: 1fr; gap: 24px; }
  .service-detail--reverse .service-detail__grid { direction: ltr; }
  .service-detail__image { order: -1; }
  .service-detail__title { font-size: 1.25rem; }

  .consulting { padding: 60px 0; }
  .consulting__grid { grid-template-columns: 1fr; gap: 32px; }

  .coverage { padding: 60px 0; }
  .coverage__grid { grid-template-columns: 1fr; gap: 32px; }
  .coverage__map { order: -1; }
  .region-tabs { gap: 6px; }
  .region-tab-btn { padding: 8px 16px; font-size: 0.8rem; }

  .blog { padding: 60px 0; }
  .blog__grid { grid-template-columns: 1fr; gap: 24px; }

  .contact { padding: 60px 0; }
  .contact__grid { grid-template-columns: 1fr; gap: 32px; }
  .contact-form { padding: 24px; }
  .form-row { grid-template-columns: 1fr; }

  .footer__grid { grid-template-columns: 1fr; gap: 32px; }
  .testimonials { padding: 60px 0; }
  .testimonial-card { min-width: 100%; padding: 0 8px; }
  .testimonial-card__text { font-size: 0.9rem; }
  .reviews__rating { flex-wrap: wrap; gap: 8px; }
  .reviews__score { font-size: 1.5rem; }
}

/* --- Tablet: 768px+ --- */
@media (min-width: 768px) and (max-width: 1023px) {
  .nav__toggle { display: flex; }
  .nav__list {
    position: fixed;
    top: 0;
    right: -100%;
    width: 320px;
    height: 100vh;
    background: var(--primary);
    flex-direction: column;
    padding: 90px 28px 32px;
    gap: 6px;
    align-items: stretch;
    box-shadow: -4px 0 30px rgba(0,0,0,0.3);
    transition: right 0.3s ease;
    z-index: 400;
  }
  body.nav-open .nav__list { right: 0; }
  body.nav-open .header { z-index: 500; }
  body.nav-open::after {
    content: '';
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,0.5);
    z-index: 350;
  }

  .nav__link {
    padding: 16px 20px;
    font-size: 0.95rem;
    color: rgba(255,255,255,0.85);
    border-radius: 8px;
    transition: background 0.2s ease, color 0.2s ease;
  }
  .nav__link:hover {
    color: var(--accent);
    background: rgba(255,255,255,0.05);
  }
  .nav__item--dropdown:hover > .nav__submenu { display: none; }
  .nav__submenu {
    position: static;
    box-shadow: none;
    background: rgba(255,255,255,0.03);
    border-radius: var(--radius-sm);
    margin: 2px 0 6px 8px;
    padding: 4px 0;
    min-width: auto;
    animation: none;
    border-left: 2px solid var(--accent);
  }
  .nav__item--dropdown > .nav__submenu.open { display: block; }
  .nav__submenu-link {
    color: rgba(255,255,255,0.6);
    font-size: 0.85rem;
    padding: 10px 14px;
    overflow-wrap: break-word;
    transition: padding-left 0.2s ease, color 0.2s ease;
  }
  .nav__submenu-link:hover {
    color: var(--accent);
    padding-left: 18px;
  }

  .hero__title { font-size: 2.5rem; }

  .segments__content { max-width: 500px; }
  .service-detail__grid { grid-template-columns: 1fr 1fr; gap: 40px; }

  .about__grid { grid-template-columns: 1fr 1fr; gap: 40px; }
  .segments__grid { grid-template-columns: 1fr 1fr; gap: 40px; }
  .consulting__grid { grid-template-columns: 1fr 1fr; gap: 40px; }

  .products__grid { grid-template-columns: repeat(2, 1fr); }
  .services-teaser__grid { grid-template-columns: repeat(3, 1fr); }
  .services-hub__grid { grid-template-columns: repeat(2, 1fr); }
  .other-services__grid { grid-template-columns: repeat(2, 1fr); }

  .testimonial-card { min-width: 50%; }

  .blog__grid { grid-template-columns: repeat(2, 1fr); }
  .blog__grid .blog-card:last-child { display: none; }

  .footer__grid { grid-template-columns: repeat(2, 1fr); gap: 32px; }
}

/* --- Desktop: 1024px+ --- */
@media (min-width: 1024px) {
  .service-detail__grid { gap: 60px; }
}

/* --- Wide: 1280px+ --- */
@media (min-width: 1280px) {
  :root { --container: 1280px; }
  .hero__title { font-size: 3.5rem; }
}

/* --- Print --- */
@media print {
  .topbar, .header, .whatsapp-float, .back-to-top, .testimonials, .blog { display: none; }
  .hero { min-height: auto; padding: 40px 0; }
  body { color: #000; }
}

/* --- Reduced Motion --- */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }
  .fade-in, .fade-in-left, .fade-in-right, .fade-in-up {
    opacity: 1;
    transform: none;
  }
}