/* ============================
   ShopMaster — Main Stylesheet
   ============================ */

/* CSS Variables / Theme */
:root {
  --primary: #6c5ce7;
  --primary-dark: #5a4bd1;
  --primary-light: #a29bfe;
  --secondary: #00cec9;
  --success: #00b894;
  --danger: #e17055;
  --warning: #fdcb6e;
  --dark: #2d3436;
  --gray-900: #2d3436;
  --gray-700: #636e72;
  --gray-500: #b2bec3;
  --gray-300: #dfe6e9;
  --gray-100: #f5f6fa;
  --bg: #ffffff;
  --bg-alt: #f8f9ff;
  --radius: 12px;
  --radius-sm: 8px;
  --radius-lg: 16px;
  --shadow: 0 2px 12px rgba(108,92,231,0.08);
  --shadow-lg: 0 8px 32px rgba(108,92,231,0.12);
  --transition: 0.25s ease;
  --font: 'Segoe UI', system-ui, -apple-system, sans-serif;
  --header-h: 64px;
}

/* Reset */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; }
body {
  font-family: var(--font);
  color: var(--dark);
  background: var(--bg);
  line-height: 1.6;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

a { color: var(--primary); text-decoration: none; }
a:hover { opacity: 0.85; }
img { max-width: 100%; height: auto; display: block; }

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

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 20px;
  border: 2px solid transparent;
  border-radius: var(--radius-sm);
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition);
  background: transparent;
  font-family: inherit;
}
.btn-sm { padding: 6px 14px; font-size: 0.85rem; }
.btn-lg { padding: 14px 28px; font-size: 1.05rem; }
.btn-primary { background: var(--primary); color: #fff; }
.btn-primary:hover { background: var(--primary-dark); transform: translateY(-1px); box-shadow: 0 4px 15px rgba(108,92,231,0.3); }
.btn-outline { border-color: var(--primary); color: var(--primary); }
.btn-outline:hover { background: var(--primary); color: #fff; }
.btn-success { background: var(--success); color: #fff; }
.btn-success:hover { background: #00a381; transform: translateY(-1px); }
.btn-danger { background: var(--danger); color: #fff; }
.btn-danger:hover { background: #d63031; }
.btn-ghost { background: var(--gray-100); color: var(--dark); border: 1px solid var(--gray-300); }
.btn-ghost:hover { background: var(--gray-300); }
.btn:disabled { opacity: 0.5; cursor: not-allowed; transform: none !important; }
.btn i { font-size: 1.1em; }

/* Header */
.header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: rgba(255,255,255,0.95);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--gray-300);
  height: var(--header-h);
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
}
.logo {
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--dark);
  letter-spacing: -0.5px;
}
.logo span { color: var(--primary); }
.nav { display: flex; gap: 4px; align-items: center; }
.nav-link {
  padding: 8px 14px;
  border-radius: var(--radius-sm);
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--gray-700);
  transition: var(--transition);
  cursor: pointer;
  position: relative;
}
.nav-link:hover, .nav-link.active { background: var(--gray-100); color: var(--primary); }
.cart-badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 20px;
  height: 20px;
  padding: 0 6px;
  background: var(--danger);
  color: #fff;
  border-radius: 10px;
  font-size: 0.7rem;
  font-weight: 700;
  vertical-align: middle;
}
.header-actions { display: flex; align-items: center; gap: 10px; }
.auth-buttons { display: flex; gap: 8px; }
.user-menu { display: flex; align-items: center; gap: 12px; }
.user-greeting { font-size: 0.9rem; font-weight: 500; color: var(--gray-700); }

.auth-buttons-mobile, .user-menu-mobile { display: none; }

/* Hamburger */
.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}
.hamburger span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--dark);
  border-radius: 2px;
  transition: var(--transition);
}
.hamburger.active span:nth-child(1) { transform: rotate(45deg) translate(5px, 5px); }
.hamburger.active span:nth-child(2) { opacity: 0; }
.hamburger.active span:nth-child(3) { transform: rotate(-45deg) translate(5px, -5px); }

/* Mobile overlay */
.mobile-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.4);
  z-index: 998;
}

/* Main */
.main { flex: 1; padding: 30px 0; }
.page { display: none; animation: fadeIn 0.3s ease; }
.page.active { display: block; }
@keyframes fadeIn { from { opacity: 0; transform: translateY(10px); } to { opacity: 1; transform: translateY(0); } }

.page-header {
  margin-bottom: 28px;
}
.page-header h1 {
  font-size: 1.8rem;
  margin-bottom: 16px;
}

/* Loading */
.loading-screen {
  display: none;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 80px 20px;
  gap: 16px;
  color: var(--gray-700);
}
.spinner {
  width: 40px;
  height: 40px;
  border: 4px solid var(--gray-300);
  border-top-color: var(--primary);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* Catalog Controls */
.catalog-controls {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}
.search-box {
  flex: 1;
  min-width: 200px;
  position: relative;
}
.search-box i {
  position: absolute;
  left: 14px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--gray-500);
}
.search-box input {
  width: 100%;
  padding: 12px 12px 12px 40px;
  border: 2px solid var(--gray-300);
  border-radius: var(--radius-sm);
  font-size: 0.95rem;
  outline: none;
  transition: var(--transition);
}
.search-box input:focus { border-color: var(--primary); }

select {
  padding: 12px 16px;
  border: 2px solid var(--gray-300);
  border-radius: var(--radius-sm);
  font-size: 0.95rem;
  background: var(--bg);
  cursor: pointer;
  outline: none;
  transition: var(--transition);
  appearance: auto;
}
select:focus { border-color: var(--primary); }

/* Supplier Section */
.supplier-section { margin-bottom: 24px; }
.supplier-details {
  background: var(--bg-alt);
  border: 1px solid var(--gray-300);
  border-radius: var(--radius);
  overflow: hidden;
}
.supplier-details summary {
  padding: 16px 20px;
  cursor: pointer;
  font-weight: 600;
  color: var(--primary);
  list-style: none;
  display: flex;
  align-items: center;
  gap: 10px;
}
.supplier-details summary::-webkit-details-marker { display: none; }
.supplier-details summary:hover { background: var(--gray-100); }
.supplier-form {
  padding: 20px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.supplier-status { font-size: 0.9rem; color: var(--gray-700); margin-top: 4px; }

/* Products Grid */
.products-grid {
  display: flex;
  flex-direction: column;
  gap: 0;
  margin-top: 20px;
}

/* Product List Row */
.product-list-row {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 12px 16px;
  border: 1px solid var(--gray-200);
  border-radius: var(--radius-sm);
  margin-bottom: 4px;
  cursor: pointer;
  transition: background 0.15s;
}
.product-list-row:hover {
  background: var(--gray-50);
  border-color: var(--primary-light);
}
.product-list-img {
  width: 48px;
  height: 48px;
  border-radius: 8px;
  background: linear-gradient(135deg, var(--gray-100), var(--gray-200));
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  font-size: 1.2rem;
  color: var(--gray-500);
}
.product-list-img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  border-radius: 8px;
}
.product-list-info {
  flex: 1;
  min-width: 0;
}
.product-list-name {
  font-size: 0.95rem;
  font-weight: 600;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.product-list-category {
  font-size: 0.8rem;
  color: var(--gray-500);
}
.product-list-meta {
  display: flex;
  align-items: center;
  gap: 20px;
  flex-shrink: 0;
}
.product-list-price {
  font-size: 1rem;
  font-weight: 700;
  color: var(--primary);
  min-width: 80px;
  text-align: right;
}
.product-list-rating {
  font-size: 0.85rem;
  color: var(--accent);
  min-width: 70px;
  text-align: center;
}
.product-list-stock {
  font-size: 0.8rem;
  min-width: 80px;
  text-align: center;
}
.product-list-stock.in-stock { color: var(--success); }
.product-list-stock.out-of-stock { color: var(--danger); }

/* Pagination */
.pagination {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  margin-top: 28px;
  flex-wrap: wrap;
}
.pagination-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 14px;
  border: 2px solid var(--gray-300);
  border-radius: var(--radius-sm);
  background: var(--bg);
  color: var(--gray-700);
  font-size: 0.9rem;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition);
  font-family: inherit;
}
.pagination-btn:hover:not(:disabled) {
  border-color: var(--primary);
  color: var(--primary);
}
.pagination-btn.active {
  background: var(--primary);
  border-color: var(--primary);
  color: #fff;
}
.pagination-btn:disabled {
  opacity: 0.4;
  cursor: not-allowed;
}
.pagination-ellipsis {
  padding: 8px 4px;
  color: var(--gray-500);
  font-size: 1.1rem;
  font-weight: 700;
}
.pagination-info {
  margin-left: 8px;
  font-size: 0.85rem;
  color: var(--gray-500);
}

/* Product Card */
.product-card {
  background: var(--bg);
  border: 1px solid var(--gray-300);
  border-radius: var(--radius);
  overflow: hidden;
  transition: var(--transition);
  cursor: pointer;
  display: flex;
  flex-direction: column;
}
.product-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: var(--primary-light);
}
.product-card-img {
  width: 100%;
  height: 200px;
  object-fit: cover;
  background: var(--gray-100);
}
.product-card-img-placeholder {
  width: 100%;
  height: 200px;
  background: linear-gradient(135deg, var(--gray-100), var(--gray-300));
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 3rem;
  color: var(--gray-500);
}
.product-card-body {
  padding: 16px;
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.product-card-title {
  font-size: 1rem;
  font-weight: 600;
  line-height: 1.3;
}
.product-card-category {
  font-size: 0.8rem;
  color: var(--gray-500);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}
.product-card-price {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--primary);
}
.product-card-rating {
  display: flex;
  align-items: center;
  gap: 4px;
  font-size: 0.85rem;
  color: var(--warning);
}
.product-card-actions {
  padding: 12px 16px;
  border-top: 1px solid var(--gray-300);
  display: flex;
  gap: 8px;
}
.product-card-actions .btn { flex: 1; justify-content: center; }

/* Cart */
.cart-empty {
  text-align: center;
  padding: 60px 20px;
  color: var(--gray-500);
}
.cart-empty i { font-size: 4rem; margin-bottom: 16px; }
.cart-empty p { font-size: 1.1rem; margin-bottom: 16px; }
.cart-item {
  display: flex;
  gap: 16px;
  align-items: center;
  padding: 16px;
  border: 1px solid var(--gray-300);
  border-radius: var(--radius-sm);
  margin-bottom: 12px;
  transition: var(--transition);
}
.cart-item:hover { border-color: var(--primary-light); }
.cart-item-img {
  width: 80px;
  height: 80px;
  object-fit: cover;
  border-radius: var(--radius-sm);
  background: var(--gray-100);
  flex-shrink: 0;
}
.cart-item-info { flex: 1; min-width: 0; }
.cart-item-title { font-weight: 600; }
.cart-item-price { color: var(--primary); font-weight: 700; }
.cart-item-quantity {
  display: flex;
  align-items: center;
  gap: 8px;
}
.cart-item-quantity button {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  border: 1px solid var(--gray-300);
  background: var(--bg);
  cursor: pointer;
  font-size: 1.1rem;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: var(--transition);
}
.cart-item-quantity button:hover { border-color: var(--primary); color: var(--primary); }
.cart-item-quantity span {
  min-width: 24px;
  text-align: center;
  font-weight: 600;
}
.cart-item-remove {
  color: var(--danger);
  cursor: pointer;
  padding: 8px;
  border: none;
  background: none;
  font-size: 1.2rem;
  transition: var(--transition);
}
.cart-item-remove:hover { transform: scale(1.2); }

.cart-summary {
  margin-top: 20px;
  padding: 20px;
  background: var(--bg-alt);
  border-radius: var(--radius);
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 16px;
}
.cart-total {
  font-size: 1.3rem;
  font-weight: 700;
}
.cart-total span:last-child { color: var(--primary); }

/* Orders */
.orders-list { display: flex; flex-direction: column; gap: 16px; }
.order-card {
  border: 1px solid var(--gray-300);
  border-radius: var(--radius);
  padding: 20px;
  transition: var(--transition);
}
.order-card:hover { box-shadow: var(--shadow); }
.order-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 12px;
}
.order-id { font-weight: 700; color: var(--gray-700); }
.order-status {
  padding: 4px 12px;
  border-radius: 20px;
  font-size: 0.8rem;
  font-weight: 600;
}
.order-status.pending { background: #ffeaa7; color: #6c5200; }
.order-status.paid { background: #55efc4; color: #006644; }
.order-status.shipped { background: #74b9ff; color: #003b6f; }
.order-status.delivered { background: var(--primary-light); color: #fff; }
.order-status.cancelled { background: var(--danger); color: #fff; }
.order-items { font-size: 0.9rem; color: var(--gray-700); margin-bottom: 8px; }
.order-total { font-weight: 700; font-size: 1.1rem; color: var(--primary); }
.order-date { font-size: 0.8rem; color: var(--gray-500); }

/* Payment */
.payment-form {
  max-width: 520px;
  margin: 0 auto;
}
.payment-order-info {
  background: var(--bg-alt);
  padding: 16px;
  border-radius: var(--radius-sm);
  margin-bottom: 20px;
}
.payment-methods {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-bottom: 20px;
}
.payment-method {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 16px;
  border: 2px solid var(--gray-300);
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: var(--transition);
}
.payment-method:hover, .payment-method:has(input:checked) {
  border-color: var(--primary);
  background: var(--bg-alt);
}
.payment-method input { accent-color: var(--primary); }
.payment-card-form {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-bottom: 20px;
}
.form-row { display: flex; gap: 12px; }
.form-row .form-group { flex: 1; }
.payment-status { margin-top: 12px; }
.payment-success {
  text-align: center;
  padding: 40px;
}
.payment-success i { font-size: 4rem; color: var(--success); margin-bottom: 16px; }

/* Product Detail Modal */
.modal-lg { max-width: 700px !important; }
.product-detail {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
}
.product-detail-img {
  width: 100%;
  border-radius: var(--radius-sm);
  background: var(--gray-100);
}
.product-detail-info { display: flex; flex-direction: column; gap: 12px; }
.product-detail-info h2 { font-size: 1.5rem; }
.product-detail-desc { color: var(--gray-700); line-height: 1.7; }
.product-detail-price { font-size: 2rem; font-weight: 700; color: var(--primary); }
.product-detail-rating { color: var(--warning); }

/* Forms */
.form-group { display: flex; flex-direction: column; gap: 6px; }
.form-group label { font-size: 0.9rem; font-weight: 600; color: var(--gray-700); }
.form-group input, .form-group select, .form-group textarea {
  padding: 12px 14px;
  border: 2px solid var(--gray-300);
  border-radius: var(--radius-sm);
  font-size: 0.95rem;
  font-family: inherit;
  outline: none;
  transition: var(--transition);
}
.form-group input:focus, .form-group select:focus, .form-group textarea:focus {
  border-color: var(--primary);
}
.form-actions { margin-top: 12px; }
.form-actions .btn { width: 100%; justify-content: center; }
.form-links {
  display: flex;
  justify-content: space-between;
  margin-top: 16px;
  font-size: 0.9rem;
}
.form-error {
  color: var(--danger);
  font-size: 0.9rem;
  margin-top: 8px;
  padding: 8px 12px;
  background: #ffeaa7;
  border-radius: var(--radius-sm);
}
.form-status {
  margin-top: 8px;
  font-size: 0.9rem;
}
.checkbox-label {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.95rem;
  cursor: pointer;
  margin-top: 8px;
}
.checkbox-label input { width: 18px; height: 18px; accent-color: var(--primary); }

/* Modals */
.modal-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.5);
  z-index: 2000;
  align-items: center;
  justify-content: center;
  padding: 20px;
  overflow-y: auto;
}
.modal-overlay.active { display: flex; }
.modal {
  background: var(--bg);
  border-radius: var(--radius-lg);
  padding: 32px;
  max-width: 460px;
  width: 100%;
  position: relative;
  animation: modalIn 0.25s ease;
  max-height: 90vh;
  overflow-y: auto;
}
@keyframes modalIn {
  from { opacity: 0; transform: scale(0.95) translateY(10px); }
  to { opacity: 1; transform: scale(1) translateY(0); }
}
.modal-close {
  position: absolute;
  top: 16px;
  right: 16px;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  border: none;
  background: var(--gray-100);
  font-size: 1.3rem;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: var(--transition);
}
.modal-close:hover { background: var(--gray-300); }
.modal h2 { margin-bottom: 20px; font-size: 1.4rem; }

/* Toast */
.toast-container {
  position: fixed;
  bottom: 20px;
  right: 20px;
  z-index: 3000;
  display: flex;
  flex-direction: column;
  gap: 8px;
  max-width: 360px;
}
.toast {
  padding: 14px 20px;
  border-radius: var(--radius-sm);
  color: #fff;
  font-weight: 500;
  font-size: 0.9rem;
  box-shadow: var(--shadow-lg);
  animation: slideIn 0.3s ease;
  display: flex;
  align-items: center;
  gap: 10px;
}
.toast.success { background: var(--success); }
.toast.error { background: var(--danger); }
.toast.info { background: var(--primary); }
.toast.warning { background: #f39c12; }
@keyframes slideIn {
  from { opacity: 0; transform: translateX(40px); }
  to { opacity: 1; transform: translateX(0); }
}

/* Checkout Stepper */
.checkout-stepper {
  display: flex;
  justify-content: center;
  gap: 8px;
  margin-bottom: 24px;
  flex-wrap: wrap;
}
.checkout-step {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px 18px;
  background: var(--gray-100);
  border-radius: 20px;
  font-size: 0.85rem;
  color: var(--gray-500);
}
.checkout-step.active {
  background: var(--primary-light);
  color: #fff;
  font-weight: 600;
}
.checkout-step.completed {
  background: var(--success);
  color: #fff;
}
.checkout-step-num {
  width: 24px;
  height: 24px;
  border-radius: 50%;
  background: rgba(255,255,255,0.3);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.75rem;
  font-weight: 700;
}
.checkout-step.completed .checkout-step-num {
  background: rgba(255,255,255,0.4);
}

/* Cart delete animation */
.cart-item-removing {
  animation: fadeOut 0.3s ease forwards;
}
@keyframes fadeOut {
  to { opacity: 0; transform: translateX(30px); height: 0; padding: 0; margin: 0; overflow: hidden; }
}

/* Footer */
.footer {
  background: var(--dark);
  color: var(--gray-500);
  padding: 20px 0;
  margin-top: auto;
}
.footer-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
}
.footer-links { display: flex; gap: 16px; }
.footer-links a { color: var(--gray-500); font-size: 0.9rem; }
.footer-links a:hover { color: #fff; }

/* Utilities */
.hidden { display: none !important; }
.text-center { text-align: center; }
.text-muted { color: var(--gray-500); font-size: 0.9rem; }
.mt-4 { margin-top: 16px; }
.flex-center { display: flex; align-items: center; justify-content: center; }
.gap-2 { gap: 8px; }

/* ===== Mobile / Responsive ===== */
@media (max-width: 900px) {
  .nav {
    position: fixed;
    top: var(--header-h);
    left: 0;
    right: 0;
    flex-direction: column;
    background: var(--bg);
    border-bottom: 1px solid var(--gray-300);
    padding: 12px;
    gap: 4px;
    transform: translateY(-100%);
    opacity: 0;
    pointer-events: none;
    transition: var(--transition);
    z-index: 999;
  }
  .nav.open {
    transform: translateY(0);
    opacity: 1;
    pointer-events: auto;
  }
  .mobile-overlay.active { display: block; }
  .hamburger { display: flex; }
  .nav-link { padding: 12px 16px; width: 100%; }
  .auth-buttons { display: none; }
  .user-menu { display: none; }
  .header-inner .auth-buttons, .header-inner .user-menu {
    display: none;
  }
  .nav .auth-buttons-mobile, .nav .user-menu-mobile {
    display: flex;
    flex-direction: column;
    gap: 8px;
    padding: 12px 0;
    border-top: 1px solid var(--gray-300);
    margin-top: 8px;
  }
  .nav .auth-buttons-mobile .btn, .nav .user-menu-mobile .btn {
    width: 100%;
  }
}

@media (max-width: 768px) {
  .container { padding: 0 16px; }
  .page-header h1 { font-size: 1.4rem; }
  .catalog-controls { flex-direction: column; }
  .search-box { min-width: 0; }

  .product-card-title { font-size: 0.9rem; }
  .product-detail { grid-template-columns: 1fr; }
  .modal { padding: 24px; margin: 10px; }
  .cart-item { flex-direction: column; text-align: center; }
  .cart-item-img { width: 100%; height: 150px; }
  .cart-summary { flex-direction: column; text-align: center; }
  .form-row { flex-direction: column; gap: 8px; }
  .footer-inner { flex-direction: column; text-align: center; }
}

@media (max-width: 480px) {

  .btn-lg { padding: 12px 20px; font-size: 0.95rem; }
}