/* ==========================================================
   Tejas Speciality Chemical - Responsive & Media Queries
   ========================================================== */

@media (max-width: 1024px) {
  .hero-grid {
    grid-template-columns: 1fr;
    gap: 2.5rem;
    text-align: center;
  }

  .hero-title {
    font-size: 2.75rem;
  }

  .hero-lead {
    margin-left: auto;
    margin-right: auto;
  }

  .hero-cta-group {
    justify-content: center;
  }

  .hero-stats-row {
    justify-content: center;
  }

  .hero-qr-card {
    max-width: 480px;
    margin-left: auto;
    margin-right: auto;
  }

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

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

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

  .qr-spotlight-grid {
    grid-template-columns: 1fr;
    gap: 2.5rem;
    text-align: center;
  }

  .qr-device-mockup-frame {
    max-width: 460px;
    margin: 0 auto;
  }

  .footer-top-grid {
    grid-template-columns: 1fr 1fr;
    gap: 2.5rem;
  }

  .grid-2-asym,
  .grid-2-detail,
  .industry-item-grid,
  .industry-item-grid.reverse {
    grid-template-columns: 1fr;
    gap: 2.5rem;
  }

  .grid-3,
  .grid-4 {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 768px) {
  .grid-2,
  .grid-3,
  .grid-4 {
    grid-template-columns: 1fr !important;
    gap: 1.5rem !important;
  }
  .site-header {
    backdrop-filter: none;
    -webkit-backdrop-filter: none;
    background-color: #ffffff;
  }

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

  .top-bar .container {
    justify-content: center;
  }

  .top-bar-right {
    flex-wrap: wrap;
    justify-content: center;
    gap: 0.35rem 0.85rem;
    font-size: 0.76rem;
  }

  .brand-logo-img {
    height: 48px;
  }

  .mobile-toggle {
    display: block;
  }

  /* Full viewport backdrop overlay for mobile drawer */
  .nav-backdrop {
    display: block;
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    height: 100dvh;
    background: rgba(4, 41, 75, 0.6);
    backdrop-filter: blur(4px);
    -webkit-backdrop-filter: blur(4px);
    z-index: 1050;
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
    transition: opacity 0.3s ease, visibility 0.3s;
  }

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

  /* Modern Offscreen Slide-in Drawer */
  .nav-menu {
    position: fixed;
    top: 0;
    right: 0;
    width: min(320px, 85vw);
    height: 100vh;
    height: 100dvh;
    background: var(--color-white);
    box-shadow: -10px 0 35px rgba(0, 0, 0, 0.25);
    flex-direction: column;
    align-items: stretch;
    padding: 1.25rem 1.5rem 2rem;
    gap: 0.35rem;
    transform: translateX(105%);
    visibility: hidden;
    pointer-events: none;
    transition: transform 0.32s cubic-bezier(0.16, 1, 0.3, 1), visibility 0.32s;
    z-index: 1100;
    overflow-y: auto;
  }

  .nav-menu.open {
    transform: translateX(0);
    visibility: visible;
    pointer-events: auto;
  }

  .nav-menu-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-bottom: 0.85rem;
    border-bottom: 1px solid var(--color-slate-100);
    margin-bottom: 0.5rem;
  }

  .nav-menu-title {
    font-family: var(--font-heading);
    font-size: 1.05rem;
    font-weight: 700;
    color: var(--color-primary);
  }

  .btn-close-menu {
    background: var(--color-slate-100);
    border: none;
    width: 36px;
    height: 36px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-slate-700);
    font-size: 1.1rem;
    cursor: pointer;
    transition: background var(--transition-fast);
  }

  .btn-close-menu:hover {
    background: var(--color-slate-200);
    color: var(--color-primary);
  }

  .nav-menu .nav-link {
    font-size: 1.05rem;
    width: 100%;
    padding: 0.75rem 0;
    border-bottom: 1px solid var(--color-slate-100);
    display: flex;
    align-items: center;
    justify-content: space-between;
  }

  .nav-menu .nav-link:hover,
  .nav-menu .nav-link.active {
    color: var(--color-cyan-dark);
    font-weight: 700;
  }

  .nav-menu-footer {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
    margin-top: 1.25rem;
    padding-top: 1.25rem;
    border-top: 1px solid var(--color-slate-100);
  }

  .btn-menu-call {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    font-family: var(--font-heading);
    font-weight: 700;
    font-size: 0.875rem;
    color: var(--color-primary);
    background: var(--color-slate-50);
    padding: 0.7rem;
    border-radius: var(--radius-md);
    border: 1px solid var(--color-slate-200);
  }

  .nav-actions {
    display: none;
  }

  .hero-section {
    padding: 3.5rem 0 4.5rem;
  }

  .hero-glow-blob {
    display: none !important;
  }

  .hero-title {
    font-size: 2.15rem;
  }

  .hero-stats-row {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1.25rem 0.75rem;
    text-align: center;
    justify-content: center;
  }

  .section {
    padding: 4rem 0;
  }

  .section-title {
    font-size: 1.85rem;
  }

  .category-card-grid {
    grid-template-columns: 1fr;
  }

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

  .pillar-card-grid {
    grid-template-columns: 1fr;
  }

  .contact-grid {
    grid-template-columns: 1fr;
    gap: 2rem;
  }

  .contact-form-box {
    padding: 1.75rem 1.25rem;
  }

  .form-grid-2 {
    grid-template-columns: 1fr;
  }

  .footer-top-grid {
    grid-template-columns: 1fr;
    gap: 2rem;
  }

  .footer-bottom-bar {
    flex-direction: column;
    text-align: center;
    gap: 0.85rem;
    padding-top: 1.5rem;
  }

  .floating-qr-tooltip {
    display: none;
  }

  .floating-qr-dock {
    bottom: 1.25rem;
    right: 1.25rem;
  }

  .regular-supply-strip {
    flex-direction: column;
    align-items: flex-start;
    padding: 1.25rem;
    gap: 1rem;
  }

  .regular-supply-action {
    width: 100%;
  }

  .regular-supply-action .btn {
    width: 100%;
  }

  .mobile-catalogue-strip {
    flex-direction: column;
    align-items: flex-start;
    padding: 1.25rem;
    gap: 1.25rem;
  }

  .mcc-right {
    width: 100%;
  }

  .mcc-right .btn {
    width: 100%;
  }
}

@media (max-width: 480px) {
  .container {
    padding-left: 1rem;
    padding-right: 1rem;
  }

  h1, .hero-title {
    font-size: 1.75rem !important;
    word-break: break-word;
    overflow-wrap: break-word;
    letter-spacing: -0.25px;
  }

  .section-title {
    font-size: 1.5rem !important;
    word-break: break-word;
  }

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

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

  .qr-render-box {
    width: 150px;
    height: 150px;
  }

  .spotlight-qr-canvas-holder {
    width: 170px;
    height: 170px;
    max-width: 100%;
  }

  .modal-dialog {
    padding: 1.5rem 1rem !important;
    max-width: 92vw !important;
  }
}