/* ==========================================================================
   INVERSELIFE TEA BRAND - RESPONSIVE DESIGN SYSTEM (responsive.css)
   Target Viewports: 320px, 360px, 375px, 390px, 430px, 600px, 768px, 1024px, 1280px, 1440px
   ========================================================================== */

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

  .hero-subtitle {
    margin: 0 auto 2rem;
  }

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

  .product-grid {
    grid-template-columns: repeat(3, 1fr);
    gap: 1.5rem;
  }

  .cart-layout-grid,
  .checkout-layout-grid,
  .product-detail-layout {
    grid-template-columns: 1fr;
    gap: 2rem;
  }

  /* Remove sticky positioning on order summary when stacked */
  .checkout-layout-grid .checkout-form-box:last-child {
    position: static !important;
  }

  .feature-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 1.5rem;
  }

  .reviews-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 1.5rem;
  }

  .footer-grid {
    grid-template-columns: 1fr repeat(2, 1fr);
    gap: 2.5rem;
  }

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

  .journey-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 1.25rem;
  }
}

/* Tablet (768px and down) */
@media (max-width: 768px) {
  .site-header {
    height: auto;
  }

  .header-inner {
    height: 70px;
  }

  /* Accessible, Full-Height Mobile Nav Drawer */
  .nav-menu {
    position: fixed;
    top: 70px;
    left: 0;
    right: 0;
    width: 100%;
    max-height: calc(100vh - 70px);
    overflow-y: auto;
    -webkit-overflow-scrolling: touch;
    background-color: #FFFFFF;
    flex-direction: column;
    align-items: stretch;
    padding: 1.75rem 1.5rem 2.5rem;
    gap: 0;
    box-shadow: 0 16px 32px rgba(18, 37, 27, 0.12);
    border-bottom: 1px solid var(--border-color);
    display: none;
    z-index: 999;
  }

  .nav-menu.open {
    display: flex;
    animation: menuSlideDown 0.25s cubic-bezier(0.16, 1, 0.3, 1) forwards;
  }

  @keyframes menuSlideDown {
    from {
      opacity: 0;
      transform: translateY(-8px);
    }
    to {
      opacity: 1;
      transform: translateY(0);
    }
  }

  .nav-menu li {
    width: 100%;
    border-bottom: 1px solid var(--light-gray);
  }

  .nav-menu li:last-child {
    border-bottom: none;
  }

  .nav-link {
    display: block;
    padding: 0.9rem 0.5rem;
    font-size: 1.05rem;
    font-weight: 600;
  }

  .nav-link::after {
    display: none;
  }

  .mobile-nav-toggle {
    display: inline-flex;
  }

  .product-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 1.25rem;
  }

  .product-card-body {
    padding: 1rem;
  }

  .account-grid {
    grid-template-columns: 1fr !important;
    gap: 1.5rem !important;
  }

  .reviews-grid {
    grid-template-columns: 1fr;
    gap: 1.25rem;
  }

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

  .footer-bottom {
    flex-direction: column;
    gap: 1rem;
    text-align: center;
  }

  /* Featured Bestseller on homepage */
  #featured-bestseller-box {
    grid-template-columns: 1fr !important;
    padding: 2rem !important;
    gap: 2rem !important;
    text-align: center;
  }

  #featured-bestseller-box .rating-group {
    justify-content: center;
  }

  #featured-bestseller-box .price-box {
    justify-content: center;
  }

  #featured-bestseller-box .pack-size-selector {
    justify-content: center;
  }

  .quality-grid {
    grid-template-columns: 1fr;
    gap: 1.25rem;
  }
}

/* Small Tablets & Large Phones (600px and down) */
@media (max-width: 600px) {
  .form-row-2,
  .form-row-3 {
    grid-template-columns: 1fr !important;
    gap: 1rem !important;
  }

  .feature-grid {
    grid-template-columns: 1fr;
    gap: 1.25rem;
  }

  /* Rating Breakdown Box in reviews.html */
  .rating-breakdown-card {
    flex-direction: column !important;
    text-align: center !important;
    gap: 1.75rem !important;
    padding: 1.75rem !important;
  }

  /* Specifications table in product.html */
  .product-spec-table th,
  .product-spec-table td {
    display: block !important;
    width: 100% !important;
    padding: 0.35rem 0 !important;
  }

  .product-spec-table tr {
    display: block;
    padding: 0.75rem 0;
    border-bottom: 1px solid var(--border-color);
  }

  .product-spec-table th {
    font-size: 0.85rem;
    color: var(--tea-gold);
    text-transform: uppercase;
  }
}

/* Standard Mobile Viewports (480px, 430px, 390px, 375px, 360px) */
@media (max-width: 480px) {
  .header-inner {
    height: 65px;
  }

  .nav-menu {
    top: 65px;
    max-height: calc(100vh - 65px);
    padding: 1.25rem 1rem 2rem;
  }

  .container {
    padding: 0 1rem;
  }

  .announcement-bar {
    padding: 0.45rem 0.75rem;
    font-size: 0.75rem;
  }

  .hero-section {
    padding: 2rem 0 3rem;
  }

  .hero-content h1 {
    font-size: 2.1rem;
  }

  .hero-cta-group {
    flex-direction: column;
    width: 100%;
    gap: 0.75rem;
  }

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

  /* 2-Column Responsive Product Grid on Mobile */
  .product-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 0.65rem;
  }

  .product-card-image {
    padding: 0.75rem;
  }

  .product-card-body {
    padding: 0.75rem;
  }

  .product-card-title {
    font-size: 0.95rem;
  }

  .price-current {
    font-size: 1.05rem;
  }

  .price-mrp {
    font-size: 0.8rem;
  }

  .pack-size-selector {
    gap: 0.25rem;
    margin-bottom: 0.75rem;
  }

  .pack-pill {
    padding: 0.25rem 0.45rem;
    font-size: 0.72rem;
    min-height: 32px;
  }

  /* Product Details Page CTAs */
  .product-actions-group {
    flex-direction: column !important;
    gap: 0.75rem !important;
  }

  .product-actions-group .btn {
    width: 100% !important;
  }

  /* Cart & Checkout card padding */
  .cart-box-wrapper,
  .checkout-form-box {
    padding: 1rem !important;
  }

  /* Checkout payment method labels: better touch targets & wrapping on mobile */
  #payment-method-selector label {
    padding: 0.85rem 1rem !important;
    gap: 0.65rem !important;
  }

  #payment-method-selector label strong {
    font-size: 0.88rem !important;
  }

  #payment-method-selector label span {
    font-size: 0.75rem !important;
  }

  /* Checkout section headings smaller on mobile */
  #checkout-form h3 {
    font-size: 1.05rem !important;
    margin: 1.5rem 0 1rem !important;
  }

  /* Allow long CTA button text to wrap on narrow screens */
  #place-order-btn {
    white-space: normal !important;
    word-break: break-word;
    line-height: 1.35;
    padding: 0.85rem 1rem !important;
    font-size: 0.92rem !important;
  }

  /* Payment alert box mobile padding */
  #checkout-payment-alert {
    padding: 0.75rem 0.85rem !important;
    font-size: 0.85rem !important;
  }

  /* Order summary item rows on mobile */
  #checkout-summary-items > div {
    gap: 0.5rem !important;
  }

  /* Order confirmation card on mobile */
  #checkout-view-wrapper .text-center {
    padding: 1.5rem 1rem !important;
  }

  /* Search & Filter Toolbar in shop.html */
  .shop-toolbar {
    flex-direction: column !important;
    align-items: stretch !important;
    gap: 0.75rem !important;
  }

  .shop-toolbar-group {
    flex-direction: column !important;
    width: 100% !important;
  }

  .shop-toolbar input,
  .shop-toolbar select {
    width: 100% !important;
  }

  /* Order Card on Mobile */
  .order-summary-card {
    flex-direction: column !important;
    align-items: flex-start !important;
    gap: 0.75rem !important;
  }

  .order-summary-card > div:last-child {
    width: 100%;
    display: flex;
    justify-content: space-between;
    align-items: center;
  }

  .toast {
    font-size: 0.85rem;
    padding: 0.75rem 1rem;
  }

  /* Homepage 480px Layout Overrides */
  .journey-grid {
    grid-template-columns: 1fr;
    gap: 1rem;
    margin-top: 2rem;
  }

  .offer-card {
    width: 100%;
    padding: 1.5rem;
  }

  .newsletter-form {
    flex-direction: column;
    gap: 0.75rem;
  }

  .newsletter-form .btn {
    width: 100%;
  }

  .featured-bestseller-actions {
    flex-direction: column;
    width: 100%;
  }

  .featured-bestseller-actions .btn {
    width: 100%;
  }

  #featured-bestseller-box {
    padding: 1.25rem !important;
  }
}

/* Compact Mobile Viewport (320px - 380px) */
@media (max-width: 380px) {
  .brand-logo {
    font-size: 1.15rem;
    letter-spacing: 0;
  }

  .header-inner {
    gap: 0.4rem;
  }

  .header-actions {
    gap: 0.25rem;
  }

  .header-icon-btn {
    width: 38px;
    height: 38px;
    min-width: 38px;
    min-height: 38px;
  }

  .mobile-nav-toggle {
    width: 38px;
    height: 38px;
    min-width: 38px;
    min-height: 38px;
  }

  /* Single Column on narrow screens to prevent text clashing */
  .product-grid {
    grid-template-columns: 1fr;
    gap: 1rem;
  }

  .btn {
    padding: 0.65rem 1rem;
    font-size: 0.875rem;
  }

  .qty-btn {
    width: 38px;
    height: 38px;
    min-width: 38px;
  }

  .qty-input {
    width: 40px;
    height: 38px;
  }

  #featured-bestseller-box {
    padding: 1rem !important;
  }

  /* Checkout compact mobile adjustments */
  .checkout-form-box {
    padding: 0.85rem !important;
  }

  #payment-method-selector label {
    padding: 0.7rem 0.75rem !important;
    gap: 0.5rem !important;
  }

  /* "Instant & Secure" badge: stack below title on tiny screens */
  #payment-method-selector label > div > div {
    flex-direction: column !important;
    align-items: flex-start !important;
    gap: 0.3rem !important;
  }

  #place-order-btn {
    font-size: 0.85rem !important;
    padding: 0.75rem 0.75rem !important;
  }

  /* Order summary totals row */
  #checkout-summary-items h5 {
    font-size: 0.88rem !important;
  }
}