/**
 * Responsive Layout Utilities
 * Mobile-first responsive design system
 */

/* ========================================
   RESPONSIVE UTILITIES
======================================== */

/* Loading States */
.loading {
  position: relative;
  pointer-events: none;
  opacity: 0.6;
}

.loading::after {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  width: 40px;
  height: 40px;
  margin: -20px 0 0 -20px;
  border: 4px solid #f3f3f3;
  border-top: 4px solid #667eea;
  border-radius: 50%;
  animation: spin 1s linear infinite;
}

@keyframes spin {
  0% { transform: rotate(0deg); }
  100% { transform: rotate(360deg); }
}

/* Accessibility */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0,0,0,0);
  white-space: nowrap;
  border-width: 0;
}

.focus-visible:focus {
  outline: 2px solid #667eea;
  outline-offset: 2px;
}

/* Responsive Images */
img {
  max-width: 100%;
  height: auto;
  display: block;
}

/* Container Queries */
.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
}

@media (min-width: 768px) {
  .container {
    padding: 0 40px;
  }
}

@media (min-width: 1024px) {
  .container {
    padding: 0 60px;
  }
}

/* Grid System */
.grid {
  display: grid;
  gap: 20px;
  grid-template-columns: 1fr;
}

@media (min-width: 640px) {
  .grid-2 {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 768px) {
  .grid-3 {
    grid-template-columns: repeat(3, 1fr);
  }
}

@media (min-width: 1024px) {
  .grid-4 {
    grid-template-columns: repeat(4, 1fr);
  }
}

/* Flex Utilities */
.flex {
  display: flex;
}

.flex-col {
  flex-direction: column;
}

.flex-wrap {
  flex-wrap: wrap;
}

.items-center {
  align-items: center;
}

.justify-between {
  justify-content: space-between;
}

.justify-center {
  justify-content: center;
}

.gap-1 { gap: 0.25rem; }
.gap-2 { gap: 0.5rem; }
.gap-3 { gap: 0.75rem; }
.gap-4 { gap: 1rem; }
.gap-6 { gap: 1.5rem; }

/* Spacing */
.m-0 { margin: 0; }
.mt-1 { margin-top: 0.25rem; }
.mt-2 { margin-top: 0.5rem; }
.mt-4 { margin-top: 1rem; }
.mt-6 { margin-top: 1.5rem; }
.mb-2 { margin-bottom: 0.5rem; }
.mb-4 { margin-bottom: 1rem; }
.mb-6 { margin-bottom: 1.5rem; }

.p-0 { padding: 0; }
.p-2 { padding: 0.5rem; }
.p-4 { padding: 1rem; }
.p-6 { padding: 1.5rem; }

/* Text Utilities */
.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }

.text-sm { font-size: 0.875rem; }
.text-base { font-size: 1rem; }
.text-lg { font-size: 1.125rem; }
.text-xl { font-size: 1.25rem; }
.text-2xl { font-size: 1.5rem; }
.text-3xl { font-size: 1.875rem; }

.font-normal { font-weight: 400; }
.font-medium { font-weight: 500; }
.font-semibold { font-weight: 600; }
.font-bold { font-weight: 700; }

/* Display Utilities */
.hidden { display: none !important; }
.block { display: block; }
.inline-block { display: inline-block; }

@media (max-width: 639px) {
  .sm\\:hidden { display: none !important; }
}

@media (min-width: 640px) {
  .sm\\:block { display: block; }
}

@media (max-width: 767px) {
  .md\\:hidden { display: none !important; }
}

@media (min-width: 768px) {
  .md\\:block { display: block; }
  .md\\:flex { display: flex; }
}

@media (max-width: 1023px) {
  .lg\\:hidden { display: none !important; }
}

@media (min-width: 1024px) {
  .lg\\:block { display: block; }
  .lg\\:flex { display: flex; }
}

/* ========================================
   RESPONSIVE PRODUCT CARDS
======================================== */

.products-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 20px;
  padding: 20px 0;
}

@media (min-width: 640px) {
  .products-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
  }
}

@media (min-width: 768px) {
  .products-grid {
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
  }
}

@media (min-width: 1024px) {
  .products-grid {
    grid-template-columns: repeat(4, 1fr);
  }
}

.product-card {
  background: white;
  border-radius: 12px;
  overflow: hidden;
  box-shadow: 0 2px 8px rgba(0,0,0,0.1);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.product-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 8px 16px rgba(0,0,0,0.15);
}

.product-image-wrapper {
  position: relative;
  padding-top: 100%;
  overflow: hidden;
  background: #f5f5f5;
}

.product-image {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.product-info {
  padding: 16px;
}

.product-title {
  font-size: 1rem;
  font-weight: 600;
  margin: 0 0 8px 0;
  color: #333;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.product-price {
  font-size: 1.25rem;
  font-weight: 700;
  color: #667eea;
  margin: 0 0 12px 0;
}

.product-actions {
  display: flex;
  gap: 8px;
  flex-direction: column;
}

@media (min-width: 768px) {
  .product-actions {
    flex-direction: row;
  }
}

.wishlist-btn {
  position: absolute;
  top: 12px;
  right: 12px;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: white;
  border: none;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
  color: #666;
  transition: all 0.3s ease;
  box-shadow: 0 2px 8px rgba(0,0,0,0.1);
  z-index: 10;
}

.wishlist-btn:hover {
  background: #667eea;
  color: white;
  transform: scale(1.1);
}

.wishlist-btn.active {
  background: #dc3545;
  color: white;
}

/* ========================================
   RESPONSIVE CART/WISHLIST DROPDOWNS
======================================== */

.action-dropdown {
  position: absolute;
  top: 100%;
  right: 0;
  width: 100vw;
  max-width: 400px;
  background: white;
  box-shadow: 0 8px 24px rgba(0,0,0,0.15);
  border-radius: 12px;
  margin-top: 8px;
  opacity: 0;
  visibility: hidden;
  transform: translateY(-10px);
  transition: all 0.3s ease;
  z-index: 1000;
  max-height: 80vh;
  overflow-y: auto;
}

@media (max-width: 639px) {
  .action-dropdown {
    position: fixed;
    top: auto;
    bottom: 0;
    left: 0;
    right: 0;
    max-width: 100%;
    border-radius: 12px 12px 0 0;
    transform: translateY(100%);
  }
}

.action-dropdown.active {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.dropdown-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 20px;
  border-bottom: 1px solid #eee;
}

.dropdown-head h3 {
  margin: 0;
  font-size: 1.125rem;
  font-weight: 600;
}

.dropdown-close {
  background: none;
  border: none;
  font-size: 20px;
  cursor: pointer;
  color: #666;
  padding: 4px;
  line-height: 1;
}

.dropdown-body {
  padding: 16px;
  max-height: 400px;
  overflow-y: auto;
}

.dropdown-foot {
  padding: 16px 20px;
  border-top: 1px solid #eee;
}

.cart-item,
.wishlist-item {
  display: flex;
  gap: 12px;
  padding: 12px 0;
  border-bottom: 1px solid #eee;
}

.cart-item:last-child,
.wishlist-item:last-child {
  border-bottom: none;
}

.cart-item-image,
.wishlist-item-image {
  width: 60px;
  height: 60px;
  object-fit: cover;
  border-radius: 8px;
  flex-shrink: 0;
}

.cart-item-details,
.wishlist-item-details {
  flex: 1;
}

.cart-item-title,
.wishlist-item-title {
  font-size: 0.875rem;
  font-weight: 600;
  margin: 0 0 4px 0;
}

.cart-item-price,
.wishlist-item-price {
  font-size: 0.875rem;
  color: #667eea;
  font-weight: 600;
  margin: 0;
}

.cart-item-remove,
.wishlist-item-remove {
  background: none;
  border: none;
  color: #999;
  cursor: pointer;
  padding: 4px;
  font-size: 16px;
}

.cart-item-remove:hover,
.wishlist-item-remove:hover {
  color: #dc3545;
}

.empty-state {
  text-align: center;
  padding: 40px 20px;
  color: #999;
}

/* ========================================
   RESPONSIVE BUTTONS
======================================== */

button,
.btn,
.btn-primary,
.btn-secondary,
.btn-outline {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 12px 24px;
  font-size: 1rem;
  font-weight: 600;
  border-radius: 8px;
  cursor: pointer;
  transition: all 0.3s ease;
  text-decoration: none;
  border: none;
  white-space: nowrap;
}

.btn-primary,
.btn-primary-full {
  background: #667eea;
  color: white;
  width: 100%;
}

.btn-primary:hover {
  background: #5568d3;
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(102,126,234,0.3);
}

.btn-secondary {
  background: #28a745;
  color: white;
}

.btn-secondary:hover {
  background: #218838;
}

.btn-outline {
  background: white;
  color: #667eea;
  border: 2px solid #667eea;
  width: 100%;
}

.btn-outline:hover {
  background: #667eea;
  color: white;
}

.btn-text {
  background: none;
  color: #667eea;
  text-decoration: underline;
  padding: 8px;
}

@media (max-width: 639px) {
  button,
  .btn {
    font-size: 0.875rem;
    padding: 10px 20px;
  }
}

/* ========================================
   RESPONSIVE NAVIGATION
======================================== */

/* Navbar styles removed - see navbar.css for all navbar styling */

.action-btn {
  position: relative;
  background: none;
  border: none;
  font-size: 24px;
  color: #333;
  cursor: pointer;
  padding: 8px;
}

.action-badge {
  position: absolute;
  top: 0;
  right: 0;
  background: #dc3545;
  color: white;
  font-size: 10px;
  font-weight: 700;
  min-width: 18px;
  height: 18px;
  border-radius: 9px;
  display: none;
  align-items: center;
  justify-content: center;
  padding: 0 4px;
}

/* Mobile Menu */
@media (max-width: 767px) {
  .mobile-menu-toggle {
    display: block;
    background: none;
    border: none;
    font-size: 24px;
    cursor: pointer;
    padding: 8px;
  }
  
  .mobile-menu {
    position: fixed;
    top: 0;
    right: -100%;
    width: 80%;
    max-width: 300px;
    height: 100vh;
    background: white;
    box-shadow: -4px 0 12px rgba(0,0,0,0.1);
    transition: right 0.3s ease;
    z-index: 1001;
    overflow-y: auto;
  }
  
  .mobile-menu.active {
    right: 0;
  }
  
  .mobile-menu-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100vh;
    background: rgba(0,0,0,0.5);
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
    z-index: 1000;
  }
  
  .mobile-menu-overlay.active {
    opacity: 1;
    visibility: visible;
  }
}

/* Print Styles */
@media print {
  .modern-navbar,
  .navbar-actions,
  .mobile-menu,
  .action-dropdown,
  button {
    display: none !important;
  }
}