/* =========================================================
   Tech4U — Inner pages (catalog, detail, cart, checkout)
   ========================================================= */

/* ================= Catalog layout ================= */
.product-grid--3 {
  grid-template-columns: repeat(3, 1fr);
}

.filter-panel {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
  overflow: hidden;
}

.filter-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 18px;
  font-weight: 700;
  font-size: 0.92rem;
  color: var(--ink);
  border-bottom: 1px solid var(--line);
  background: #fafbff;
}

.filter-head i {
  color: var(--brand-600);
  margin-right: 6px;
}

.filter-reset {
  font-size: 0.74rem;
  font-weight: 600;
  color: var(--danger);
}

.filter-block {
  padding: 18px;
  border-bottom: 1px solid var(--line);
}

.filter-title {
  font-size: 0.78rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--muted);
  margin-bottom: 12px;
}

.filter-list {
  display: grid;
  gap: 4px;
}

.filter-link {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  padding: 9px 12px;
  border-radius: 10px;
  font-size: 0.86rem;
  font-weight: 500;
  color: var(--ink-soft);
  transition: all 0.18s ease;
}

.filter-link span i {
  color: #94a3b8;
  margin-right: 8px;
  font-size: 0.75rem;
}

.filter-link > i {
  font-size: 0.65rem;
  color: #cbd5e1;
}

.filter-link:hover {
  background: #f5f6ff;
  color: var(--brand-700);
}

.filter-link.active {
  background: var(--brand-100);
  color: var(--brand-700);
  font-weight: 700;
}

.filter-link.active span i,
.filter-link.active > i {
  color: var(--brand-600);
}

.price-inputs {
  display: flex;
  align-items: center;
  gap: 8px;
}

.price-inputs span {
  color: #cbd5e1;
}

.price-inputs .form-control {
  padding: 9px 10px;
  font-size: 0.82rem;
}

.catalog-toolbar {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 22px;
  flex-wrap: wrap;
}

.catalog-title {
  font-size: 1.4rem;
  margin-bottom: 4px;
}

.catalog-count {
  margin: 0;
  font-size: 0.84rem;
  color: var(--muted);
}

.catalog-count strong {
  color: var(--ink);
}

/* ================= Pagination ================= */
.pagination-modern {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 8px;
  list-style: none;
  padding: 0;
  margin: 0;
}

.page-btn {
  min-width: 42px;
  height: 42px;
  border-radius: 12px;
  background: #fff;
  border: 1px solid var(--line);
  display: grid;
  place-items: center;
  font-weight: 600;
  font-size: 0.88rem;
  color: var(--ink-soft);
  transition: all 0.18s ease;
}

.page-btn:hover {
  border-color: var(--brand-500);
  color: var(--brand-700);
}

.page-btn.active {
  background: var(--gradient);
  border-color: transparent;
  color: #fff;
  box-shadow: 0 10px 20px rgba(79, 70, 229, 0.28);
}

.page-btn.disabled {
  opacity: 0.45;
  pointer-events: none;
}

/* ================= Detail page ================= */
.detail-gallery {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  padding: 18px;
}

.detail-gallery__main {
  position: relative;
  background: linear-gradient(160deg, #f8f9ff 0%, #eef1fb 100%);
  border-radius: var(--radius);
  height: 430px;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 26px;
  overflow: hidden;
}

.detail-gallery__main img {
  max-width: 100%;
  max-height: 100%;
  object-fit: contain;
  mix-blend-mode: multiply;
}

.detail-sale {
  position: absolute;
  top: 16px;
  left: 16px;
  font-size: 0.8rem;
}

.detail-thumbs {
  display: flex;
  gap: 10px;
  margin-top: 14px;
  flex-wrap: wrap;
}

.detail-thumb {
  width: 74px;
  height: 74px;
  border-radius: 12px;
  border: 1px solid var(--line);
  background: #fafbff;
  display: grid;
  place-items: center;
  padding: 6px;
  cursor: pointer;
  transition: all 0.18s ease;
}

.detail-thumb img {
  max-width: 100%;
  max-height: 100%;
  object-fit: contain;
}

.detail-thumb:hover,
.detail-thumb.active {
  border-color: var(--brand-500);
  box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.12);
}

/* Tabs & specs */
.detail-tabs {
  border-radius: var(--radius);
}

.detail-tabs .card-body {
  padding: 6px 12px 0;
}

.detail-tabs .tab-content {
  background: #fff;
}

.detail-description {
  color: var(--ink-soft);
  font-size: 0.93rem;
  line-height: 1.8;
  margin-bottom: 20px;
}

.detail-highlights {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px 16px;
  padding: 16px;
  border-radius: 14px;
  background: #f8f9ff;
  font-size: 0.84rem;
}

.detail-highlights i {
  color: var(--success);
  margin-right: 6px;
}

.table-specs td {
  font-size: 0.86rem;
}

.table-specs td:first-child {
  width: 40%;
  color: var(--muted);
  font-weight: 600;
  background: #fafbff;
}

/* Reviews */
.review-summary {
  display: flex;
  align-items: center;
  gap: 24px;
  padding: 18px;
  border-radius: 14px;
  background: linear-gradient(120deg, #f8f9ff, #eef2ff);
  margin-bottom: 22px;
}

.review-score {
  text-align: center;
  min-width: 110px;
}

.review-score strong {
  display: block;
  font-size: 2.2rem;
  line-height: 1;
  color: var(--ink);
}

.review-score span {
  font-size: 0.74rem;
  color: var(--muted);
}

.review-stars {
  color: #dbe1ee;
  font-size: 0.86rem;
  letter-spacing: 1px;
}

.review-stars i.on {
  color: #f59e0b;
}

.review-summary-text {
  font-size: 0.86rem;
  color: var(--muted);
}

.review-list {
  display: grid;
  gap: 16px;
  margin-bottom: 26px;
}

.review-item {
  display: flex;
  gap: 14px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--line);
}

.review-item:last-child {
  border-bottom: 0;
}

.review-avatar {
  width: 42px;
  height: 42px;
  border-radius: 50%;
  background: var(--brand-100);
  color: var(--brand-700);
  display: grid;
  place-items: center;
  font-weight: 700;
  flex-shrink: 0;
}

.review-body {
  flex: 1;
}

.review-head {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 6px;
}

.review-head strong {
  font-size: 0.88rem;
  color: var(--ink);
}

.review-date {
  font-size: 0.74rem;
  color: var(--muted);
  margin-left: 10px;
}

.review-body p {
  font-size: 0.88rem;
  color: var(--ink-soft);
  margin: 0;
}

.empty-reviews {
  text-align: center;
  padding: 28px;
  color: var(--muted);
}

.empty-reviews i {
  font-size: 2rem;
  color: #cbd5e1;
  margin-bottom: 10px;
}

.empty-reviews p {
  margin: 0;
  font-size: 0.88rem;
}

.review-form {
  padding-top: 22px;
  border-top: 1px solid var(--line);
}

.review-form h4 {
  font-size: 1rem;
  margin-bottom: 16px;
}

.stars {
  display: flex;
  flex-direction: row-reverse;
  justify-content: flex-end;
  gap: 4px;
}

.stars input {
  display: none;
}

.stars label {
  font-size: 1.5rem;
  color: #dbe1ee;
  cursor: pointer;
  transition: color 0.2s;
  margin: 0;
}

.stars input:checked ~ label,
.stars label:hover,
.stars label:hover ~ label {
  color: #f59e0b;
}

.login-to-review {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 16px;
  border-radius: 12px;
  background: #f8f9ff;
  font-size: 0.88rem;
  color: var(--muted);
}

.login-to-review i {
  color: var(--brand-600);
}

/* Buy panel */
.buy-panel {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow);
  padding: 26px;
}

.buy-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 14px;
}

.buy-title {
  font-size: clamp(1.2rem, 1.8vw, 1.6rem);
  line-height: 1.35;
  margin-bottom: 12px;
}

.buy-rating {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 10px;
  font-size: 0.78rem;
  color: var(--muted);
  padding-bottom: 16px;
  border-bottom: 1px solid var(--line);
  margin-bottom: 18px;
}

.buy-rating-sep {
  color: #e2e8f0;
}

.buy-price {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 10px;
  padding: 16px;
  border-radius: 14px;
  background: linear-gradient(120deg, #fef2f2, #fff7ed);
  margin-bottom: 14px;
}

.buy-price-now {
  font-size: 1.7rem;
  font-weight: 800;
  color: var(--danger);
  letter-spacing: -0.03em;
}

.buy-price-old {
  font-size: 0.9rem;
  color: #94a3b8;
  text-decoration: line-through;
}

.buy-stock {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 0.84rem;
  font-weight: 600;
  margin-bottom: 18px;
}

.buy-stock.in {
  color: var(--success);
}

.buy-stock.out {
  color: var(--danger);
}

.buy-variants {
  margin-bottom: 20px;
}

.variant-group {
  margin-bottom: 14px;
}

.variant-label {
  display: block;
  font-weight: 600;
  font-size: 0.84rem;
  color: var(--ink-soft);
  margin-bottom: 8px;
}

.variant-selector {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.variant-selector .btn {
  min-width: 64px;
  padding: 7px 14px;
  font-size: 0.84rem;
  border-radius: 10px;
  background: #fff;
}

.variant-selector .btn-check:checked + .btn {
  background: var(--brand-600);
  border-color: var(--brand-600);
  color: #fff;
  box-shadow: 0 8px 18px rgba(79, 70, 229, 0.25);
}

.buy-actions {
  display: flex;
  gap: 12px;
  margin-bottom: 20px;
}

.qty-control {
  display: inline-flex;
  align-items: center;
  border: 1px solid var(--line);
  border-radius: 12px;
  overflow: hidden;
  background: #fff;
  flex-shrink: 0;
}

.qty-btn {
  width: 42px;
  height: 48px;
  border: 0;
  background: #f8f9ff;
  color: var(--ink);
  font-size: 1.1rem;
  font-weight: 600;
  cursor: pointer;
  transition: background 0.15s ease;
}

.qty-btn:hover {
  background: var(--brand-100);
  color: var(--brand-700);
}

.qty-input {
  width: 54px;
  height: 48px;
  border: 0;
  text-align: center;
  font-weight: 700;
  font-size: 0.95rem;
  outline: none;
  color: var(--ink);
}

.qty-value {
  min-width: 38px;
  text-align: center;
  font-weight: 700;
  font-size: 0.9rem;
}

.qty-control--sm .qty-btn {
  width: 32px;
  height: 34px;
  font-size: 0.9rem;
}

.buy-add {
  flex: 1;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

.buy-trust {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
  padding-top: 18px;
  border-top: 1px solid var(--line);
  font-size: 0.78rem;
  color: var(--muted);
}

.buy-trust div {
  display: flex;
  align-items: center;
  gap: 8px;
}

.buy-trust i {
  color: var(--brand-600);
}

/* ================= Cart ================= */
.cart-card {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
  overflow: hidden;
}

.cart-table {
  margin: 0;
}

.cart-table thead th {
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--muted);
  background: #fafbff;
  padding: 14px 18px;
  border-bottom: 1px solid var(--line);
}

.cart-table td {
  padding: 18px;
  border-bottom: 1px solid var(--line);
}

.cart-table tbody tr:last-child td {
  border-bottom: 0;
}

.cart-product {
  display: flex;
  align-items: center;
  gap: 14px;
}

.cart-thumb {
  width: 82px;
  height: 82px;
  border-radius: 12px;
  border: 1px solid var(--line);
  background: #f8f9ff;
  display: grid;
  place-items: center;
  padding: 8px;
  flex-shrink: 0;
}

.cart-thumb img {
  max-width: 100%;
  max-height: 100%;
  object-fit: contain;
  mix-blend-mode: multiply;
}

.cart-product-info {
  min-width: 0;
}

.cart-product-name {
  display: block;
  font-weight: 600;
  font-size: 0.9rem;
  color: var(--ink);
  margin-bottom: 4px;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.cart-product-name:hover {
  color: var(--brand-600);
}

.cart-variants {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.cart-variants span {
  font-size: 0.72rem;
  color: var(--muted);
  background: #f5f6fb;
  padding: 3px 8px;
  border-radius: 6px;
}

.cart-unit-price {
  font-size: 0.88rem;
  color: var(--ink-soft);
  font-weight: 600;
}

.cart-line-total {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 14px;
  flex-wrap: wrap;
}

.cart-line-total strong {
  font-size: 0.98rem;
  color: var(--danger);
  font-weight: 800;
}

.cart-remove {
  width: 34px;
  height: 34px;
  border-radius: 10px;
  border: 1px solid var(--line);
  background: #fff;
  color: #94a3b8;
  cursor: pointer;
  transition: all 0.18s ease;
}

.cart-remove:hover {
  border-color: #fecaca;
  background: #fef2f2;
  color: var(--danger);
}

.cart-continue {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin-top: 18px;
  font-size: 0.86rem;
  font-weight: 600;
  color: var(--muted);
}

.cart-continue:hover {
  color: var(--brand-600);
}

/* Summary box (cart + checkout) */
.cart-summary {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
  padding: 24px;
}

.cart-summary h3 {
  font-size: 1.05rem;
  margin-bottom: 18px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.summary-count {
  font-size: 0.72rem;
  background: var(--brand-100);
  color: var(--brand-700);
  padding: 3px 10px;
  border-radius: 999px;
  font-weight: 700;
}

.summary-items {
  display: grid;
  gap: 12px;
  max-height: 320px;
  overflow-y: auto;
  padding-right: 4px;
  margin-bottom: 18px;
}

.summary-item {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  font-size: 0.84rem;
  padding-bottom: 12px;
  border-bottom: 1px dashed var(--line);
}

.summary-item:last-child {
  border-bottom: 0;
  padding-bottom: 0;
}

.summary-item-main strong {
  display: block;
  font-weight: 600;
  color: var(--ink);
  line-height: 1.4;
  margin-bottom: 2px;
}

.summary-item-main small {
  display: block;
  font-size: 0.72rem;
  color: var(--muted);
}

.summary-qty {
  margin-top: 2px;
}

.summary-item > span {
  font-weight: 700;
  color: var(--ink);
  white-space: nowrap;
}

.summary-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.86rem;
  padding: 10px 0;
  color: var(--muted);
}

.summary-row strong {
  color: var(--ink);
}

.summary-note {
  display: flex;
  gap: 8px;
  font-size: 0.74rem;
  color: #0e7490;
  background: #ecfeff;
  padding: 10px 12px;
  border-radius: 10px;
  margin: 6px 0 12px;
}

.summary-total {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 16px 0;
  margin-top: 6px;
  border-top: 1px solid var(--line);
}

.summary-total span {
  font-weight: 600;
  color: var(--ink-soft);
}

.summary-total strong {
  font-size: 1.35rem;
  color: var(--danger);
  font-weight: 800;
}

.cart-summary .btn {
  margin-top: 6px;
}

.summary-trust {
  display: grid;
  gap: 8px;
  margin-top: 18px;
  padding-top: 16px;
  border-top: 1px solid var(--line);
  font-size: 0.76rem;
  color: var(--muted);
}

.summary-trust div {
  display: flex;
  align-items: center;
  gap: 8px;
}

.summary-trust i {
  color: var(--success);
}

/* ================= Checkout ================= */
.checkout-steps {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 18px 22px;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
  margin-bottom: 24px;
}

.checkout-step {
  display: flex;
  align-items: center;
  gap: 10px;
}

.step-dot {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  display: grid;
  place-items: center;
  background: #f1f5f9;
  color: var(--muted);
  font-weight: 700;
  font-size: 0.85rem;
  flex-shrink: 0;
}

.checkout-step strong {
  display: block;
  font-size: 0.84rem;
  color: var(--ink);
  line-height: 1.2;
}

.checkout-step small {
  font-size: 0.72rem;
  color: var(--muted);
}

.checkout-step.active .step-dot {
  background: var(--gradient);
  color: #fff;
  box-shadow: 0 8px 18px rgba(79, 70, 229, 0.28);
}

.checkout-step.done .step-dot {
  background: #ecfdf5;
  color: var(--success);
}

.step-line {
  flex: 1;
  height: 2px;
  background: var(--line);
  border-radius: 2px;
}

.checkout-card {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
  padding: 22px;
  margin-bottom: 20px;
}

.checkout-card-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 18px;
}

.checkout-card-head h3 {
  font-size: 1rem;
  margin: 0;
}

.checkout-card-head h3 i {
  color: var(--brand-600);
  margin-right: 6px;
}

.address-box {
  display: flex;
  gap: 14px;
  padding: 16px;
  border-radius: 14px;
  background: #f8f9ff;
  border: 1px dashed var(--line);
}

.address-icon {
  width: 42px;
  height: 42px;
  border-radius: 12px;
  background: var(--brand-100);
  color: var(--brand-600);
  display: grid;
  place-items: center;
  flex-shrink: 0;
}

.address-name {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  margin-bottom: 4px;
}

.address-name strong {
  font-size: 0.92rem;
  color: var(--ink);
}

.address-name span {
  font-size: 0.8rem;
  color: var(--muted);
}

.address-body p {
  margin: 0;
  font-size: 0.85rem;
  color: var(--ink-soft);
}

.payment-option {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 16px;
  border: 2px solid var(--brand-500);
  border-radius: 14px;
  background: #f8f9ff;
  cursor: pointer;
  position: relative;
  transition: all 0.2s ease;
}

.payment-option input {
  position: absolute;
  opacity: 0;
}

.payment-radio {
  width: 20px;
  height: 20px;
  border-radius: 50%;
  border: 2px solid var(--brand-500);
  position: relative;
  flex-shrink: 0;
}

.payment-option input:checked + .payment-radio::after {
  content: "";
  position: absolute;
  inset: 3px;
  border-radius: 50%;
  background: var(--brand-600);
}

.payment-icon {
  width: 44px;
  height: 44px;
  border-radius: 12px;
  background: #fff;
  color: var(--success);
  display: grid;
  place-items: center;
  font-size: 1.1rem;
  box-shadow: var(--shadow-sm);
  flex-shrink: 0;
}

.payment-text strong {
  display: block;
  font-size: 0.9rem;
  color: var(--ink);
}

.payment-text small {
  font-size: 0.78rem;
  color: var(--muted);
}

.payment-check {
  margin-left: auto;
  color: var(--brand-600);
}

.checkout-note {
  display: flex;
  gap: 8px;
  align-items: center;
  padding: 12px 14px;
  margin: 14px 0;
  border-radius: 10px;
  background: #f0fdf4;
  color: #166534;
  font-size: 0.78rem;
}

/* ================= Orders / profile ================= */
.list-group-item {
  border-color: var(--line);
  padding: 18px 20px;
}

.order-status-tabs {
  background: #fff;
  border-radius: var(--radius);
  padding: 6px;
  box-shadow: var(--shadow-sm);
}

/* ================= Error pages ================= */
.error-page {
  min-height: 60vh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 60px 20px;
}

.error-page .code {
  font-size: clamp(4rem, 12vw, 8rem);
  font-weight: 800;
  line-height: 1;
  background: var(--gradient);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  letter-spacing: -0.05em;
}

.error-page h1 {
  font-size: 1.5rem;
  margin: 10px 0;
}

.error-page p {
  color: var(--muted);
  margin-bottom: 24px;
}

.error-page pre {
  text-align: left;
  background: #0b1220;
  color: #e2e8f0;
  padding: 16px;
  border-radius: 12px;
  font-size: 0.75rem;
  overflow: auto;
  max-width: 900px;
  margin: 18px auto 0;
}

/* ================= Responsive ================= */
@media (max-width: 1200px) {
  .product-grid--3 {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 992px) {
  .detail-gallery__main {
    height: 340px;
  }

  .buy-panel {
    margin-top: 8px;
  }
}

@media (max-width: 768px) {
  .checkout-steps {
    flex-wrap: wrap;
  }

  .step-line {
    display: none;
  }

  .checkout-step {
    flex: 1 1 40%;
  }

  .buy-actions {
    flex-direction: column;
  }

  .buy-actions .qty-control {
    align-self: flex-start;
  }

  .detail-highlights {
    grid-template-columns: 1fr;
  }

  .cart-summary {
    padding: 18px;
  }
}

@media (max-width: 576px) {
  .product-grid--3 {
    grid-template-columns: 1fr;
  }

  .detail-gallery__main {
    height: 260px;
  }

  .buy-trust {
    grid-template-columns: 1fr;
  }

  .cart-thumb {
    width: 64px;
    height: 64px;
  }

  .cart-table td {
    padding: 14px 10px;
  }
}