/* ========================================
   PROMO CATALOG - Design System
   ======================================== */

/* CSS Variables */
:root {
  /* Colors */
  --color-primary: #2563EB;
  --color-primary-hover: #1D4ED8;
  --color-primary-light: #DBEAFE;
  --color-background: #FFFFFF;
  --color-background-alt: #F8FAFC;
  --color-text-primary: #1E293B;
  --color-text-secondary: #64748B;
  --color-text-muted: #94A3B8;
  --color-border: #E2E8F0;
  --color-success: #10B981;
  --color-success-bg: #D1FAE5;

  /* Typography */
  --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-size-xs: 0.75rem;
  --font-size-sm: 0.875rem;
  --font-size-base: 1rem;
  --font-size-lg: 1.125rem;
  --font-size-xl: 1.25rem;
  --font-size-2xl: 1.5rem;
  --font-size-3xl: 1.875rem;

  /* Spacing */
  --spacing-xs: 0.25rem;
  --spacing-sm: 0.5rem;
  --spacing-md: 1rem;
  --spacing-lg: 1.5rem;
  --spacing-xl: 2rem;
  --spacing-2xl: 3rem;

  /* Border Radius */
  --radius-sm: 0.375rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1rem;
  --radius-full: 9999px;

  /* Shadows */
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);

  /* Transitions */
  --transition-fast: 150ms ease;
  --transition-base: 200ms ease;
  --transition-slow: 300ms ease;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-family);
  font-size: var(--font-size-base);
  line-height: 1.6;
  color: var(--color-text-primary);
  background-color: var(--color-background-alt);
  min-height: 100vh;
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

button {
  cursor: pointer;
  font-family: inherit;
  border: none;
  background: none;
}

input,
select {
  font-family: inherit;
  font-size: inherit;
}

/* ========================================
   HEADER
   ======================================== */
.header {
  background: var(--color-background);
  border-bottom: 1px solid var(--color-border);
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: var(--shadow-sm);
}

.header__container {
  max-width: 1400px;
  margin: 0 auto;
  padding: var(--spacing-md) var(--spacing-xl);
  display: flex;
  align-items: center;
  gap: var(--spacing-xl);
}

.header__logo {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  text-decoration: none;
  color: var(--color-text-primary);
  font-weight: 700;
  font-size: var(--font-size-xl);
  flex-shrink: 0;
}

.header__logo-img {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-md);
  object-fit: contain;
}

.header__search {
  flex: 1;
  max-width: 600px;
  position: relative;
}

.header__search-input {
  width: 100%;
  padding: var(--spacing-md) var(--spacing-lg);
  padding-left: 3rem;
  border: 2px solid var(--color-border);
  border-radius: var(--radius-full);
  font-size: var(--font-size-base);
  background: var(--color-background-alt);
  transition: all var(--transition-base);
}

.header__search-input:focus {
  outline: none;
  border-color: var(--color-primary);
  background: var(--color-background);
  box-shadow: 0 0 0 4px var(--color-primary-light);
}

.header__search-input::placeholder {
  color: var(--color-text-muted);
}

.header__search-icon {
  position: absolute;
  left: var(--spacing-lg);
  top: 50%;
  transform: translateY(-50%);
  color: var(--color-text-muted);
  font-size: var(--font-size-lg);
  pointer-events: none;
}

.header__cart {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  padding: var(--spacing-sm) var(--spacing-lg);
  background: var(--color-background-alt);
  border: 2px solid var(--color-border);
  border-radius: var(--radius-full);
  font-weight: 600;
  color: var(--color-text-primary);
  transition: all var(--transition-base);
  position: relative;
}

.header__cart:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
}

.header__cart-icon {
  font-size: var(--font-size-xl);
}

.header__cart-count {
  background: var(--color-primary);
  color: white;
  font-size: var(--font-size-xs);
  font-weight: 700;
  min-width: 20px;
  height: 20px;
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
  position: absolute;
  top: -4px;
  right: -4px;
}

.header__cart-count.hidden {
  display: none;
}

/* ========================================
   FILTERS
   ======================================== */
.filters {
  background: var(--color-background);
  border-bottom: 1px solid var(--color-border);
  padding: var(--spacing-lg) var(--spacing-xl);
}

.filters__container {
  max-width: 1400px;
  margin: 0 auto;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--spacing-lg);
}

.filters__group {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-xs);
}

.filters__label {
  font-size: var(--font-size-xs);
  font-weight: 600;
  color: var(--color-text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.filters__select {
  padding: var(--spacing-sm) var(--spacing-lg);
  padding-right: 2.5rem;
  border: 2px solid var(--color-border);
  border-radius: var(--radius-md);
  background: var(--color-background);
  color: var(--color-text-primary);
  font-weight: 500;
  cursor: pointer;
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='20' height='20' viewBox='0 0 24 24' fill='none' stroke='%2364748B' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='m6 9 6 6 6-6'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 0.75rem center;
  min-width: 180px;
  transition: all var(--transition-base);
}

.filters__select:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 4px var(--color-primary-light);
}

.filters__price-range {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
}

.filters__slider-container {
  position: relative;
  width: 200px;
}

.filters__slider {
  width: 100%;
  height: 6px;
  border-radius: var(--radius-full);
  background: var(--color-border);
  appearance: none;
  cursor: pointer;
}

.filters__slider::-webkit-slider-thumb {
  appearance: none;
  width: 20px;
  height: 20px;
  border-radius: var(--radius-full);
  background: var(--color-primary);
  cursor: pointer;
  box-shadow: var(--shadow-md);
  transition: transform var(--transition-fast);
}

.filters__slider::-webkit-slider-thumb:hover {
  transform: scale(1.1);
}

.filters__price-value {
  font-weight: 600;
  color: var(--color-primary);
  min-width: 60px;
}

.filters__results {
  margin-left: auto;
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
}

.filters__results strong {
  color: var(--color-text-primary);
}

/* ========================================
   CATALOG GRID
   ======================================== */
.catalog {
  max-width: 1400px;
  margin: 0 auto;
  padding: var(--spacing-xl);
}

.catalog__grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--spacing-lg);
}

.catalog__empty {
  grid-column: 1 / -1;
  text-align: center;
  padding: var(--spacing-2xl);
  color: var(--color-text-secondary);
}

.catalog__empty-icon {
  font-size: 4rem;
  margin-bottom: var(--spacing-md);
  opacity: 0.5;
}

/* ========================================
   PRODUCT CARD
   ======================================== */
.product-card {
  background: var(--color-background);
  border-radius: var(--radius-xl);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--color-border);
  transition: all var(--transition-base);
  display: flex;
  flex-direction: column;
  text-decoration: none;
  color: inherit;
  cursor: pointer;
}

.product-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: var(--color-primary-light);
}

.product-card__image-wrapper {
  position: relative;
  aspect-ratio: 1;
  overflow: hidden;
  background: var(--color-background-alt);
}

.product-card__image {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--transition-slow);
}

.product-card:hover .product-card__image {
  transform: scale(1.05);
}

.product-card__stock {
  position: absolute;
  top: var(--spacing-md);
  left: var(--spacing-md);
  background: var(--color-success-bg);
  color: var(--color-success);
  font-size: var(--font-size-xs);
  font-weight: 600;
  padding: var(--spacing-xs) var(--spacing-sm);
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
}

.product-card__content {
  padding: var(--spacing-lg);
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
  flex: 1;
}

.product-card__title {
  font-size: var(--font-size-base);
  font-weight: 700;
  color: var(--color-text-primary);
  line-height: 1.3;
}

.product-card__category {
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
}

.product-card__price {
  font-size: var(--font-size-xl);
  font-weight: 700;
  color: var(--color-primary);
  margin-top: auto;
}

.product-card__price span {
  font-size: var(--font-size-sm);
  font-weight: 400;
  color: var(--color-text-muted);
}

.product-card__button {
  margin-top: var(--spacing-md);
  width: 100%;
  padding: var(--spacing-md);
  background: var(--color-primary);
  color: white;
  font-weight: 600;
  font-size: var(--font-size-sm);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-sm);
  transition: all var(--transition-base);
}

.product-card__button:hover {
  background: var(--color-primary-hover);
  transform: translateY(-1px);
}

/* ========================================
   MODAL
   ======================================== */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(15, 23, 42, 0.6);
  backdrop-filter: blur(4px);
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--spacing-lg);
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition-base);
}

.modal-overlay.active {
  opacity: 1;
  visibility: visible;
}

.modal {
  background: var(--color-background);
  border-radius: var(--radius-xl);
  max-width: 600px;
  width: 100%;
  max-height: 90vh;
  overflow-y: auto;
  box-shadow: var(--shadow-xl);
  transform: scale(0.95) translateY(20px);
  transition: transform var(--transition-base);
}

.modal-overlay.active .modal {
  transform: scale(1) translateY(0);
}

.modal__header {
  display: flex;
  align-items: flex-start;
  gap: var(--spacing-lg);
  padding: var(--spacing-xl);
  border-bottom: 1px solid var(--color-border);
}

.modal__product-image {
  width: 100px;
  height: 100px;
  border-radius: var(--radius-lg);
  object-fit: cover;
  flex-shrink: 0;
}

.modal__product-info {
  flex: 1;
}

.modal__product-title {
  font-size: var(--font-size-xl);
  font-weight: 700;
  color: var(--color-text-primary);
  margin-bottom: var(--spacing-xs);
}

.modal__product-category {
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
  margin-bottom: var(--spacing-sm);
}

.modal__product-price {
  font-size: var(--font-size-2xl);
  font-weight: 700;
  color: var(--color-primary);
}

.modal__product-price span {
  font-size: var(--font-size-sm);
  font-weight: 400;
  color: var(--color-text-muted);
}

.modal__close {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-text-secondary);
  font-size: var(--font-size-xl);
  transition: all var(--transition-base);
  flex-shrink: 0;
}

.modal__close:hover {
  background: var(--color-background-alt);
  color: var(--color-text-primary);
}

.modal__body {
  padding: var(--spacing-xl);
}

.modal__form {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-lg);
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
}

.form-group__label {
  font-size: var(--font-size-sm);
  font-weight: 600;
  color: var(--color-text-primary);
}

.form-group__label span {
  font-weight: 400;
  color: var(--color-text-secondary);
}

.form-group__input,
.form-group__select {
  padding: var(--spacing-md);
  border: 2px solid var(--color-border);
  border-radius: var(--radius-md);
  font-size: var(--font-size-base);
  transition: all var(--transition-base);
}

.form-group__input:focus,
.form-group__select:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 4px var(--color-primary-light);
}

.form-group__input::placeholder {
  color: var(--color-text-muted);
}

.form-group__file {
  position: relative;
}

.form-group__file-input {
  position: absolute;
  inset: 0;
  opacity: 0;
  cursor: pointer;
}

.form-group__file-label {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--spacing-sm);
  padding: var(--spacing-xl);
  border: 2px dashed var(--color-border);
  border-radius: var(--radius-md);
  background: var(--color-background-alt);
  transition: all var(--transition-base);
  text-align: center;
}

.form-group__file:hover .form-group__file-label {
  border-color: var(--color-primary);
  background: var(--color-primary-light);
}

.form-group__file-icon {
  font-size: var(--font-size-2xl);
  color: var(--color-primary);
}

.form-group__file-text {
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
}

.form-group__file-text strong {
  color: var(--color-primary);
}

.form-group__file-name {
  font-size: var(--font-size-sm);
  color: var(--color-success);
  font-weight: 500;
  margin-top: var(--spacing-xs);
}

.modal__footer {
  padding: var(--spacing-xl);
  padding-top: 0;
}

.modal__submit {
  width: 100%;
  padding: var(--spacing-lg);
  background: linear-gradient(135deg, var(--color-primary), var(--color-primary-hover));
  color: white;
  font-weight: 700;
  font-size: var(--font-size-lg);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-sm);
  transition: all var(--transition-base);
  box-shadow: var(--shadow-md);
}

.modal__submit:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

.modal__submit:active {
  transform: translateY(0);
}

/* ========================================
   TOAST NOTIFICATIONS
   ======================================== */
.toast-container {
  position: fixed;
  bottom: var(--spacing-xl);
  right: var(--spacing-xl);
  z-index: 1100;
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
}

.toast {
  background: var(--color-text-primary);
  color: white;
  padding: var(--spacing-md) var(--spacing-lg);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  animation: slideIn var(--transition-base) ease;
}

.toast--success {
  background: var(--color-success);
}

@keyframes slideIn {
  from {
    transform: translateX(100%);
    opacity: 0;
  }

  to {
    transform: translateX(0);
    opacity: 1;
  }
}

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

@media (max-width: 900px) {
  .catalog__grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .header__container {
    flex-wrap: wrap;
  }

  .header__search {
    order: 3;
    max-width: 100%;
    flex-basis: 100%;
    margin-top: var(--spacing-sm);
  }

  .header__cart {
    margin-left: auto;
  }

  .filters__container {
    flex-direction: column;
    align-items: stretch;
  }

  .filters__results {
    margin-left: 0;
    text-align: center;
  }
}

@media (max-width: 600px) {
  .catalog__grid {
    grid-template-columns: 1fr;
  }

  .catalog {
    padding: var(--spacing-md);
  }

  .modal__header {
    flex-direction: column;
    align-items: center;
    text-align: center;
  }

  .modal__close {
    position: absolute;
    top: var(--spacing-md);
    right: var(--spacing-md);
  }

  .modal__product-image {
    width: 120px;
    height: 120px;
  }
}

/* ========================================
   BREADCRUMB
   ======================================== */
.breadcrumb {
  background: var(--color-background);
  border-bottom: 1px solid var(--color-border);
}

.breadcrumb__container {
  max-width: 1400px;
  margin: 0 auto;
  padding: var(--spacing-md) var(--spacing-xl);
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  font-size: var(--font-size-sm);
}

.breadcrumb__link {
  color: var(--color-primary);
  text-decoration: none;
  font-weight: 500;
  transition: color var(--transition-fast);
}

.breadcrumb__link:hover {
  color: var(--color-primary-hover);
  text-decoration: underline;
}

.breadcrumb__separator {
  color: var(--color-text-muted);
}

.breadcrumb__current {
  color: var(--color-text-secondary);
}

/* ========================================
   PRODUCT DETAIL
   ======================================== */
.product-detail {
  max-width: 1400px;
  margin: 0 auto;
  padding: var(--spacing-xl);
}

.product-detail__container {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-2xl);
  align-items: start;
}

/* Gallery */
.gallery__main {
  position: relative;
  aspect-ratio: 1;
  border-radius: var(--radius-xl);
  overflow: hidden;
  background: var(--color-background);
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow-sm);
}

.gallery__main-image {
  width: 100%;
  height: 100%;
  object-fit: contain;
  transition: transform var(--transition-slow);
  padding: var(--spacing-lg);
}

.gallery__main:hover .gallery__main-image {
  transform: scale(1.05);
}

.gallery__main .product-card__stock {
  font-size: var(--font-size-sm);
  padding: var(--spacing-sm) var(--spacing-md);
}

.gallery__thumbs {
  display: flex;
  gap: var(--spacing-sm);
  margin-top: var(--spacing-md);
  overflow-x: auto;
  padding-bottom: var(--spacing-sm);
}

.gallery__thumb {
  width: 80px;
  height: 80px;
  border-radius: var(--radius-md);
  overflow: hidden;
  border: 2px solid var(--color-border);
  cursor: pointer;
  flex-shrink: 0;
  transition: all var(--transition-base);
  background: var(--color-background);
  padding: var(--spacing-xs);
}

.gallery__thumb:hover {
  border-color: var(--color-primary-light);
}

.gallery__thumb--active {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px var(--color-primary-light);
}

.gallery__thumb img {
  width: 100%;
  height: 100%;
  object-fit: contain;
}

/* Product Info */
.product-detail__category {
  display: inline-block;
  background: var(--color-primary-light);
  color: var(--color-primary);
  font-size: var(--font-size-xs);
  font-weight: 600;
  padding: var(--spacing-xs) var(--spacing-md);
  border-radius: var(--radius-full);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.product-detail__title {
  font-size: var(--font-size-3xl);
  font-weight: 700;
  color: var(--color-text-primary);
  line-height: 1.2;
  margin-top: var(--spacing-md);
}

.product-detail__description {
  font-size: var(--font-size-base);
  color: var(--color-text-secondary);
  line-height: 1.7;
  margin-top: var(--spacing-md);
}

.product-detail__price-block {
  display: flex;
  align-items: baseline;
  gap: var(--spacing-xs);
  margin-top: var(--spacing-lg);
  padding: var(--spacing-lg);
  background: linear-gradient(135deg, var(--color-primary-light), #EEF2FF);
  border-radius: var(--radius-lg);
}

.product-detail__price {
  font-size: 2.5rem;
  font-weight: 700;
  color: var(--color-primary);
}

.product-detail__price-label {
  font-size: var(--font-size-base);
  color: var(--color-text-secondary);
}

/* Specs */
.product-detail__specs {
  margin-top: var(--spacing-xl);
}

.product-detail__specs-title,
.product-detail__marking-title,
.product-detail__quote-title {
  font-size: var(--font-size-lg);
  font-weight: 700;
  color: var(--color-text-primary);
  margin-bottom: var(--spacing-md);
  padding-bottom: var(--spacing-sm);
  border-bottom: 2px solid var(--color-border);
}

.product-detail__specs-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--spacing-md);
}

.spec-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--spacing-xs);
  padding: var(--spacing-md);
  background: var(--color-background-alt);
  border-radius: var(--radius-md);
  text-align: center;
}

.spec-item__icon {
  font-size: var(--font-size-2xl);
}

.spec-item__label {
  font-size: var(--font-size-xs);
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  font-weight: 600;
}

.spec-item__value {
  font-size: var(--font-size-sm);
  font-weight: 600;
  color: var(--color-text-primary);
}

/* Marking Options */
.product-detail__marking {
  margin-top: var(--spacing-xl);
}

.marking-info {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-md);
}

.marking-info__item {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  padding: var(--spacing-md);
  background: var(--color-background-alt);
  border-radius: var(--radius-md);
  border-left: 4px solid var(--color-primary);
}

.marking-info__icon {
  font-size: var(--font-size-2xl);
}

.marking-info__label {
  font-size: var(--font-size-xs);
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  font-weight: 600;
  display: block;
}

.marking-info__value {
  font-size: var(--font-size-base);
  font-weight: 600;
  color: var(--color-text-primary);
  display: block;
}

/* Quote Form */
.product-detail__quote {
  margin-top: var(--spacing-xl);
  padding: var(--spacing-xl);
  background: var(--color-background-alt);
  border-radius: var(--radius-xl);
  border: 1px solid var(--color-border);
}

.quote-form {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-lg);
}

.quote-form__row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-lg);
}

/* Loading State */
.product-detail__loading {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-height: 60vh;
  gap: var(--spacing-lg);
  color: var(--color-text-secondary);
}

.loading-spinner {
  width: 48px;
  height: 48px;
  border: 4px solid var(--color-border);
  border-top-color: var(--color-primary);
  border-radius: 50%;
  animation: spin 1s linear infinite;
}

@keyframes spin {
  to {
    transform: rotate(360deg);
  }
}

/* Product Detail Responsive */
@media (max-width: 900px) {
  .product-detail__container {
    grid-template-columns: 1fr;
  }

  .product-detail__title {
    font-size: var(--font-size-2xl);
  }

  .product-detail__price {
    font-size: 2rem;
  }

  .quote-form__row {
    grid-template-columns: 1fr;
  }

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

@media (max-width: 600px) {
  .product-detail {
    padding: var(--spacing-md);
  }

  .product-detail__specs-grid {
    grid-template-columns: 1fr 1fr;
  }

  .breadcrumb__container {
    padding: var(--spacing-sm) var(--spacing-md);
    font-size: var(--font-size-xs);
  }
}

/* ========================================
   CART PANEL
   ======================================== */
.cart-overlay {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.5);
  backdrop-filter: blur(4px);
  z-index: 1000;
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition-base);
}

.cart-overlay.active {
  opacity: 1;
  visibility: visible;
}

.cart-panel {
  position: fixed;
  top: 0;
  right: -420px;
  width: 420px;
  max-width: 100vw;
  height: 100vh;
  background: var(--color-background);
  box-shadow: -10px 0 40px rgba(0, 0, 0, 0.15);
  display: flex;
  flex-direction: column;
  transition: right var(--transition-base);
  z-index: 1001;
}

.cart-overlay.active .cart-panel {
  right: 0;
}

.cart-panel__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--spacing-lg) var(--spacing-xl);
  border-bottom: 1px solid var(--color-border);
  flex-shrink: 0;
}

.cart-panel__title {
  font-size: var(--font-size-lg);
  font-weight: 700;
  color: var(--color-text-primary);
}

.cart-panel__close {
  width: 36px;
  height: 36px;
  border-radius: var(--radius-full);
  border: 1px solid var(--color-border);
  background: var(--color-background);
  cursor: pointer;
  font-size: var(--font-size-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition-fast);
  color: var(--color-text-secondary);
}

.cart-panel__close:hover {
  background: var(--color-background-alt);
  color: var(--color-text-primary);
}

.cart-panel__body {
  flex: 1;
  overflow-y: auto;
  padding: var(--spacing-lg);
}

.cart-panel__empty {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-sm);
  padding: var(--spacing-2xl) var(--spacing-lg);
  text-align: center;
  color: var(--color-text-secondary);
}

.cart-panel__empty-icon {
  font-size: 3rem;
  opacity: 0.5;
}

.cart-panel__empty-hint {
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
}

.cart-panel__footer {
  border-top: 1px solid var(--color-border);
  padding: var(--spacing-lg) var(--spacing-xl);
  flex-shrink: 0;
}

.cart-panel__summary {
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
  margin-bottom: var(--spacing-md);
  text-align: center;
  font-weight: 600;
}

.cart-panel__submit {
  width: 100%;
  justify-content: center;
}

/* Cart Item */
.cart-item {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  padding: var(--spacing-md);
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border);
  margin-bottom: var(--spacing-md);
  transition: all var(--transition-fast);
  background: var(--color-background);
}

.cart-item:hover {
  border-color: var(--color-primary-light);
  box-shadow: var(--shadow-sm);
}

.cart-item__image {
  width: 64px;
  height: 64px;
  border-radius: var(--radius-md);
  object-fit: contain;
  background: var(--color-background-alt);
  flex-shrink: 0;
  padding: 4px;
}

.cart-item__info {
  flex: 1;
  min-width: 0;
}

.cart-item__title {
  font-size: var(--font-size-sm);
  font-weight: 600;
  color: var(--color-text-primary);
  margin: 0;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.cart-item__details {
  font-size: var(--font-size-xs);
  color: var(--color-text-muted);
  margin: 2px 0;
}

.cart-item__price {
  font-size: var(--font-size-sm);
  font-weight: 700;
  color: var(--color-primary);
  margin: 0;
}

.cart-item__remove {
  width: 36px;
  height: 36px;
  border-radius: var(--radius-full);
  border: none;
  background: transparent;
  cursor: pointer;
  font-size: var(--font-size-base);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  transition: all var(--transition-fast);
  opacity: 0.5;
}

.cart-item__remove:hover {
  background: #FEE2E2;
  opacity: 1;
}

@media (max-width: 480px) {
  .cart-panel {
    width: 100vw;
    right: -100vw;
  }
}

/* ========================================
   CONTACT FORM (in cart panel)
   ======================================== */
.contact-form__intro {
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
  margin-bottom: var(--spacing-md);
}

.contact-form__summary {
  background: var(--color-background-alt);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--spacing-sm) var(--spacing-md);
  font-size: var(--font-size-xs);
  color: var(--color-text-secondary);
  margin-bottom: var(--spacing-lg);
  line-height: 1.5;
}

.contact-form__fields {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-md);
}

.contact-form__actions {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
}

.contact-form__back {
  background: none;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--spacing-sm) var(--spacing-md);
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
  cursor: pointer;
  transition: all var(--transition-fast);
  text-align: center;
}

.contact-form__back:hover {
  background: var(--color-background-alt);
  color: var(--color-text-primary);
}

.form-group__optional {
  font-weight: 400;
  color: var(--color-text-muted);
  font-size: var(--font-size-xs);
}