/* ==========================================================
   AK CONSTRUCTION - RESPONSIVE STYLESHEET
   Comprehensive multi-device breakpoints
   Large Desktop > Laptop > Tablet > Mobile
   ========================================================== */

/* ----------------------------------------------------------
   1. LAPTOPS & SMALL DESKTOPS (max-width: 1200px)
   ---------------------------------------------------------- */
@media (max-width: 1200px) {
  :root {
    --container-max: 1020px;
  }
  
  .services-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .why-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .hero-features-bar {
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
  }

  .footer-top {
    grid-template-columns: 1.2fr 1fr 1fr 1.2fr;
    gap: 36px;
  }
}

/* ----------------------------------------------------------
   2. TABLETS & MEDIUM SCREENS (max-width: 991px)
   ---------------------------------------------------------- */
@media (max-width: 991px) {
  :root {
    --header-height: 72px;
  }

  .section {
    padding: 75px 0;
  }

  .top-bar-meta {
    display: none;
  }

  /* Mobile Navigation Drawer */
  .mobile-toggle {
    display: flex;
  }

  .header-actions .btn {
    display: none;
  }

  .main-nav {
    position: fixed;
    top: 0;
    right: -100%;
    width: 320px;
    height: 100vh;
    background-color: var(--color-primary-dark);
    padding: 100px 30px 40px;
    box-shadow: -10px 0 30px rgba(0, 0, 0, 0.5);
    transition: right 0.4s cubic-bezier(0.16, 1, 0.3, 1);
    z-index: 1005;
    overflow-y: auto;
    flex-direction: column;
    align-items: flex-start;
  }

  .main-nav.active {
    right: 0;
  }

  .nav-list {
    flex-direction: column;
    align-items: flex-start;
    width: 100%;
    gap: 20px;
  }

  .nav-link {
    font-size: 1.0625rem;
    display: block;
    width: 100%;
    padding: 10px 0;
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  }

  .main-nav .mobile-nav-cta {
    display: block !important;
    margin-top: 30px;
    width: 100%;
  }

  /* Overlay backdrop for mobile menu */
  .nav-backdrop {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.65);
    backdrop-filter: blur(4px);
    z-index: 1004;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
  }

  .nav-backdrop.active {
    opacity: 1;
    visibility: visible;
  }

  /* Grids */
  .about-grid,
  .story-grid,
  .projects-featured-grid,
  .leadership-grid,
  .contact-layout,
  .project-details-grid {
    grid-template-columns: 1fr;
    gap: 40px;
  }

  .service-detail-item,
  .service-detail-item.reverse {
    grid-template-columns: 1fr;
    direction: ltr;
  }

  .values-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .project-details-meta-bar {
    grid-template-columns: repeat(2, 1fr);
    margin-top: -30px;
    padding: 24px;
  }

  .footer-top {
    grid-template-columns: 1fr 1fr;
    gap: 40px;
  }

  .cta-box {
    flex-direction: column;
    text-align: center;
  }

  .cta-text p {
    margin: 0 auto;
  }

  .about-image-card img {
    height: 420px;
  }
}

/* ----------------------------------------------------------
   3. MOBILE PHONES (max-width: 767px)
   ---------------------------------------------------------- */
@media (max-width: 767px) {
  :root {
    --topbar-height: 38px;
    --header-height: 66px;
  }

  .section {
    padding: 60px 0;
  }

  .top-bar-info {
    font-size: 0.75rem;
    gap: 14px;
  }

  .hero-section {
    padding-top: calc(var(--header-height) + var(--topbar-height) + 20px);
    padding-bottom: 60px;
  }

  .hero-btn-group {
    flex-direction: column;
    width: 100%;
  }

  .hero-btn-group .btn {
    width: 100%;
  }

  .hero-features-bar {
    grid-template-columns: 1fr;
    gap: 14px;
    padding-top: 24px;
  }

  .services-grid,
  .why-grid,
  .values-grid,
  .vision-mission-grid {
    grid-template-columns: 1fr;
    gap: 20px;
  }

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

  .contact-form-card {
    padding: 26px 20px;
  }

  .about-features-list,
  .capabilities-list,
  .scope-list {
    grid-template-columns: 1fr;
  }

  .about-corner-badge {
    position: static;
    margin-top: 16px;
    max-width: 100%;
  }

  .gallery-grid {
    columns: 1;
  }

  .footer-top {
    grid-template-columns: 1fr;
    gap: 36px;
  }

  .footer-bottom .container {
    flex-direction: column;
    gap: 12px;
    text-align: center;
  }

  .floating-whatsapp {
    bottom: 20px;
    right: 20px;
    width: 52px;
    height: 52px;
    font-size: 1.6rem;
  }

  .back-to-top {
    bottom: 84px;
    right: 22px;
    width: 42px;
    height: 42px;
  }

  .project-media {
    height: 250px;
  }

  .project-details-meta-bar {
    grid-template-columns: 1fr;
    gap: 16px;
  }

  .lightbox-nav-btn {
    width: 40px;
    height: 40px;
    font-size: 1rem;
  }

  .lightbox-prev { left: 10px; }
  .lightbox-next { right: 10px; }
  .lightbox-close { top: 15px; right: 20px; }
}

/* ----------------------------------------------------------
   4. SMALL MOBILE SCREENS (max-width: 480px)
   ---------------------------------------------------------- */
@media (max-width: 480px) {
  .hero-title {
    font-size: 2.1rem;
  }

  .section-title {
    font-size: 1.75rem;
  }

  .brand-logo-img {
    height: 40px;
  }

  .main-nav {
    width: 100%;
  }
}