/* ============================================
   ПРОТОФЛЕКС-СИБИРЬ — Catalog & Product Pages
   Дополнительные компоненты для catalog.html и product.html
   ============================================ */

/* --- INTERNAL PAGES: container + header fixes --- */
body.page-internal .container {
    max-width: 1400px;
    padding: 0 40px;
}

/* Header always solid (dark) on internal pages.
   Overrides .header base (transparent) + matches .header.scrolled */
body.page-internal .header {
    background: rgba(11, 17, 32, 0.92);
    backdrop-filter: blur(24px) saturate(180%);
    -webkit-backdrop-filter: blur(24px) saturate(180%);
    border-bottom: 1px solid rgba(255,255,255,0.04);
}

/* Breadcrumbs bar под шапкой на детальной странице */
.breadcrumbs-bar {
    background: var(--white);
    border-bottom: 1px solid var(--gray-200);
    padding-top: 96px;
}
.breadcrumbs-bar .container {
    padding-top: 24px;
    padding-bottom: 24px;
}

/* --- PAGE HERO (облегчённый hero для внутренних страниц) --- */
.page-hero {
    position: relative;
    background: var(--navy);
    padding: 140px 0 64px;
    overflow: hidden;
}

.page-hero__bg {
    position: absolute;
    inset: 0;
    background:
        radial-gradient(ellipse 60% 50% at 70% 40%, rgba(56, 189, 248, 0.08) 0%, transparent 100%),
        radial-gradient(ellipse 40% 60% at 10% 80%, rgba(245, 158, 11, 0.04) 0%, transparent 100%);
}

.page-hero__grid-lines {
    position: absolute;
    inset: 0;
    background-image:
        linear-gradient(rgba(255,255,255,0.02) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255,255,255,0.02) 1px, transparent 1px);
    background-size: 60px 60px;
    mask-image: linear-gradient(180deg, rgba(0,0,0,1) 0%, rgba(0,0,0,0) 100%);
    -webkit-mask-image: linear-gradient(180deg, rgba(0,0,0,1) 0%, rgba(0,0,0,0) 100%);
}

.page-hero__inner {
    position: relative;
    z-index: 1;
}

.page-hero__title {
    font-size: clamp(2rem, 4.5vw, 3.25rem);
    font-weight: 800;
    line-height: 1.1;
    letter-spacing: -0.02em;
    color: var(--white);
    margin: 16px 0 12px;
}

.page-hero__desc {
    font-size: 1rem;
    color: rgba(255,255,255,0.5);
    max-width: 640px;
    line-height: 1.7;
}

.page-hero__stats {
    display: flex;
    gap: 32px;
    margin-top: 32px;
    padding-top: 32px;
    border-top: 1px solid rgba(255,255,255,0.06);
}

.page-hero__stat {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.page-hero__stat-value {
    font-family: 'JetBrains Mono', monospace;
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--frost);
    line-height: 1;
}

.page-hero__stat-label {
    font-size: 0.688rem;
    color: rgba(255,255,255,0.4);
    text-transform: uppercase;
    letter-spacing: 0.08em;
}

/* --- BREADCRUMBS --- */
.breadcrumbs {
    display: flex;
    align-items: center;
    gap: 8px;
    flex-wrap: wrap;
    font-size: 0.813rem;
    color: rgba(255,255,255,0.4);
}

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

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

.breadcrumbs__link {
    color: rgba(255,255,255,0.6);
    transition: color var(--duration) var(--ease);
}
.breadcrumbs__link:hover {
    color: var(--frost);
}

.breadcrumbs--dark .breadcrumbs__link {
    color: var(--gray-500);
}
.breadcrumbs--dark .breadcrumbs__link:hover {
    color: var(--frost-deep);
}

.breadcrumbs__sep {
    opacity: 0.5;
    font-size: 0.75rem;
}

.breadcrumbs__current {
    color: rgba(255,255,255,0.9);
    font-weight: 500;
}

.breadcrumbs--dark .breadcrumbs__current {
    color: var(--text);
}

/* --- CATALOG LAYOUT --- */
.catalog-page {
    background: var(--gray-50);
    padding: 48px 0 120px;
    min-height: 60vh;
}

.catalog-layout {
    display: grid;
    grid-template-columns: 280px 1fr;
    gap: 40px;
    align-items: flex-start;
}

/* --- FILTERS SIDEBAR --- */
.filters {
    background: var(--white);
    border-radius: var(--radius);
    border: 1px solid var(--gray-200);
    padding: 24px;
    position: sticky;
    top: 96px;
    max-height: calc(100vh - 120px);
    overflow-y: auto;
}

.filters__head {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
    padding-bottom: 16px;
    border-bottom: 1px solid var(--gray-200);
}

.filters__title {
    font-size: 0.938rem;
    font-weight: 700;
    letter-spacing: -0.01em;
}

.filters__reset {
    background: none;
    border: none;
    color: var(--frost-deep);
    font-size: 0.75rem;
    font-weight: 600;
    cursor: pointer;
    padding: 4px 8px;
    border-radius: var(--radius-xs);
    transition: background var(--duration) var(--ease);
}
.filters__reset:hover {
    background: var(--frost-pale);
}
.filters__reset:disabled {
    color: var(--gray-400);
    cursor: default;
}
.filters__reset:disabled:hover {
    background: transparent;
}

/* --- FILTER GROUP --- */
.filter-group {
    padding: 16px 0;
    border-bottom: 1px solid var(--gray-100);
}
.filter-group:last-child {
    border-bottom: none;
}

.filter-group__title {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--gray-600);
    margin-bottom: 12px;
    cursor: pointer;
    user-select: none;
}

.filter-group__arrow {
    transition: transform var(--duration) var(--ease);
    opacity: 0.5;
}
.filter-group.collapsed .filter-group__arrow {
    transform: rotate(-90deg);
}
.filter-group.collapsed .filter-group__body {
    display: none;
}

.filter-group__body {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

/* Checkboxes */
.filter-check {
    display: flex;
    align-items: center;
    gap: 10px;
    cursor: pointer;
    font-size: 0.875rem;
    color: var(--text);
    transition: color var(--duration) var(--ease);
}
.filter-check:hover {
    color: var(--frost-deep);
}

.filter-check input {
    appearance: none;
    width: 18px;
    height: 18px;
    border: 1.5px solid var(--gray-300);
    border-radius: var(--radius-xs);
    background: var(--white);
    cursor: pointer;
    transition: all var(--duration) var(--ease);
    flex-shrink: 0;
    position: relative;
}
.filter-check input:checked {
    border-color: var(--frost);
    background: var(--frost);
}
.filter-check input:checked::after {
    content: '';
    position: absolute;
    left: 4px;
    top: 1px;
    width: 5px;
    height: 10px;
    border: solid var(--white);
    border-width: 0 2px 2px 0;
    transform: rotate(45deg);
}

.filter-check__count {
    margin-left: auto;
    font-size: 0.75rem;
    color: var(--gray-400);
    font-family: 'JetBrains Mono', monospace;
}

/* Chips */
.filter-chips {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
}

.filter-chip {
    padding: 6px 12px;
    border-radius: var(--radius-full);
    font-size: 0.75rem;
    font-weight: 600;
    background: var(--gray-100);
    color: var(--gray-700);
    border: 1.5px solid transparent;
    cursor: pointer;
    transition: all var(--duration) var(--ease);
    font-family: 'JetBrains Mono', monospace;
}
.filter-chip:hover {
    background: var(--gray-200);
}
.filter-chip.active {
    background: var(--frost-pale);
    color: var(--frost-deep);
    border-color: var(--frost);
}

/* --- CATALOG MAIN --- */
.catalog-main {
    min-height: 400px;
}

.sort-bar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 16px;
    margin-bottom: 24px;
    padding: 16px 20px;
    background: var(--white);
    border-radius: var(--radius-sm);
    border: 1px solid var(--gray-200);
}

.sort-bar__count {
    font-size: 0.875rem;
    color: var(--text);
}
.sort-bar__count strong {
    font-weight: 700;
    color: var(--navy);
    font-family: 'JetBrains Mono', monospace;
}

.sort-bar__controls {
    display: flex;
    align-items: center;
    gap: 12px;
}

.sort-bar__label {
    font-size: 0.813rem;
    color: var(--text-muted);
}

.sort-bar__select {
    appearance: none;
    padding: 8px 32px 8px 12px;
    border: 1.5px solid var(--gray-200);
    border-radius: var(--radius-xs);
    font-size: 0.813rem;
    color: var(--text);
    background: var(--white) url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8'%3E%3Cpath fill='none' stroke='%23334155' stroke-width='2' stroke-linecap='round' d='M1 1l5 5 5-5'/%3E%3C/svg%3E") no-repeat right 10px center;
    cursor: pointer;
    font-weight: 500;
}
.sort-bar__select:hover {
    border-color: var(--frost);
}
.sort-bar__select:focus {
    outline: none;
    border-color: var(--frost);
    box-shadow: 0 0 0 4px var(--frost-glow);
}

.filters-toggle {
    display: none;
    align-items: center;
    gap: 8px;
    padding: 8px 16px;
    background: var(--navy);
    color: var(--white);
    border: none;
    border-radius: var(--radius-sm);
    font-size: 0.813rem;
    font-weight: 600;
    cursor: pointer;
}

/* --- CATALOG GRID --- */
.catalog-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
}

.catalog-empty {
    padding: 80px 20px;
    text-align: center;
    background: var(--white);
    border-radius: var(--radius);
    border: 1px solid var(--gray-200);
}

.catalog-empty__icon {
    width: 64px;
    height: 64px;
    margin: 0 auto 20px;
    color: var(--gray-300);
}

.catalog-empty__title {
    font-size: 1.25rem;
    font-weight: 700;
    margin-bottom: 8px;
}

.catalog-empty__desc {
    font-size: 0.938rem;
    color: var(--text-muted);
    margin-bottom: 24px;
}

/* --- PRODUCT CARD EXTENSIONS --- */
.product-card--clickable {
    cursor: pointer;
}

.product-card__visual img {
    max-width: 85%;
    max-height: 85%;
    object-fit: contain;
    z-index: 1;
    mix-blend-mode: multiply;
    transition: transform var(--duration) var(--ease);
}
.product-card:hover .product-card__visual img {
    transform: scale(1.05);
}

.product-card__badges {
    position: absolute;
    top: 16px;
    right: 16px;
    z-index: 2;
    display: flex;
    flex-direction: column;
    gap: 6px;
    align-items: flex-end;
}

/* Reset position for individual badges inside container.
   (original .product-card__badge in style.css is position:absolute for single-badge case) */
.product-card__badges .product-card__badge {
    position: static;
    top: auto;
    right: auto;
}

/* Badge variants */
.product-card__badge--hit {
    background: linear-gradient(135deg, var(--accent) 0%, #FBBF24 100%);
    color: var(--navy);
    border: 1px solid rgba(245, 158, 11, 0.3);
}
.product-card__badge--new {
    background: linear-gradient(135deg, var(--frost-deep) 0%, var(--frost) 100%);
    color: var(--white);
    border: 1px solid rgba(14, 165, 233, 0.3);
}
.product-card__badge--sale {
    background: linear-gradient(135deg, #EF4444 0%, #F87171 100%);
    color: var(--white);
    border: 1px solid rgba(239, 68, 68, 0.3);
}
.product-card__badge--hot {
    background: linear-gradient(135deg, #F97316 0%, #EA580C 100%);
    color: var(--white);
    border: 1px solid rgba(249, 115, 22, 0.3);
}
.product-card__badge--recommended {
    background: var(--navy);
    color: var(--white);
    border: 1px solid rgba(11, 17, 32, 0.3);
}

.product-card__specs {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
    margin-bottom: 16px;
}

.product-card__spec {
    padding: 4px 10px;
    border-radius: var(--radius-full);
    font-size: 0.688rem;
    font-weight: 600;
    background: var(--gray-100);
    color: var(--gray-700);
    font-family: 'JetBrains Mono', monospace;
}

.product-card__footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: 16px;
    border-top: 1px solid var(--gray-100);
    margin-top: auto;
}

.product-card__price {
    display: flex;
    align-items: baseline;
    gap: 6px;
}

.product-card__price-label {
    font-size: 0.75rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    font-weight: 600;
}

.product-card__price-value {
    font-family: 'JetBrains Mono', monospace;
    font-size: 1.125rem;
    font-weight: 700;
    color: var(--navy);
    letter-spacing: -0.01em;
}

.product-card__price--request {
    font-size: 0.813rem;
    color: var(--frost-deep);
    font-weight: 600;
}

/* --- PRODUCT DETAIL PAGE --- */
.product-page {
    background: var(--white);
    padding: 48px 0;
}

.product-head {
    display: grid;
    grid-template-columns: 1.1fr 1fr;
    gap: 48px;
    align-items: flex-start;
    margin-bottom: 80px;
}

/* --- GALLERY --- */
.gallery {
    position: sticky;
    top: 100px;
}

.gallery__main {
    background: linear-gradient(135deg, var(--gray-50) 0%, var(--gray-100) 100%);
    border-radius: var(--radius);
    border: 1px solid var(--gray-200);
    height: 480px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 16px;
    overflow: hidden;
    position: relative;
}

.gallery__main img {
    max-width: 85%;
    max-height: 85%;
    object-fit: contain;
    mix-blend-mode: multiply;
}

.gallery__badges {
    position: absolute;
    top: 20px;
    left: 20px;
    display: flex;
    gap: 8px;
}

.gallery__badge {
    padding: 6px 14px;
    border-radius: var(--radius-full);
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.75rem;
    font-weight: 700;
    letter-spacing: 0.02em;
}

.gallery__thumbs {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 12px;
}

.gallery__thumb {
    background: var(--gray-50);
    border: 2px solid var(--gray-200);
    border-radius: var(--radius-sm);
    height: 80px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all var(--duration) var(--ease);
    overflow: hidden;
    padding: 8px;
}
.gallery__thumb:hover {
    border-color: var(--frost);
}
.gallery__thumb.active {
    border-color: var(--frost);
    box-shadow: 0 0 0 3px var(--frost-glow);
}
.gallery__thumb img {
    max-width: 100%;
    max-height: 100%;
    object-fit: contain;
    mix-blend-mode: multiply;
}

/* --- PRODUCT INFO --- */
.product-info__meta {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-bottom: 20px;
}

.product-info__category {
    display: inline-flex;
    align-items: center;
    padding: 6px 12px;
    border-radius: var(--radius-full);
    background: var(--frost-pale);
    color: var(--frost-deep);
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.08em;
}

.product-info__badge {
    padding: 6px 12px;
    border-radius: var(--radius-full);
    font-size: 0.75rem;
    font-weight: 700;
    letter-spacing: 0.02em;
}
.product-info__badge--hit {
    background: linear-gradient(135deg, var(--accent) 0%, #FBBF24 100%);
    color: var(--navy);
}
.product-info__badge--new {
    background: linear-gradient(135deg, var(--frost-deep) 0%, var(--frost) 100%);
    color: var(--white);
}
.product-info__badge--hot {
    background: linear-gradient(135deg, #F97316 0%, #EA580C 100%);
    color: var(--white);
}
.product-info__badge--sale {
    background: linear-gradient(135deg, #EF4444 0%, #F87171 100%);
    color: var(--white);
}

.product-info__title {
    font-size: clamp(1.5rem, 3vw, 2.25rem);
    font-weight: 800;
    line-height: 1.2;
    letter-spacing: -0.02em;
    margin-bottom: 16px;
    color: var(--text);
}

.product-info__article {
    font-size: 0.813rem;
    color: var(--text-muted);
    margin-bottom: 20px;
    font-family: 'JetBrains Mono', monospace;
}
.product-info__article strong {
    font-weight: 700;
    color: var(--text);
}

.product-info__desc {
    font-size: 1rem;
    color: var(--text-muted);
    line-height: 1.7;
    margin-bottom: 28px;
}

/* --- TEMP BADGE (large) --- */
.temp-badge {
    display: flex;
    align-items: center;
    gap: 16px;
    padding: 20px 24px;
    background: linear-gradient(135deg, var(--frost-pale) 0%, rgba(224,242,254,0.5) 100%);
    border: 1px solid rgba(56,189,248,0.2);
    border-radius: var(--radius);
    margin-bottom: 32px;
}

.temp-badge__icon {
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--white);
    border-radius: var(--radius-sm);
    color: var(--frost-deep);
    flex-shrink: 0;
}

.temp-badge__content {
    flex: 1;
}

.temp-badge__label {
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--frost-deep);
    margin-bottom: 4px;
}

.temp-badge__value {
    font-family: 'JetBrains Mono', monospace;
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--navy);
    letter-spacing: -0.01em;
}

/* --- SIZE PICKER --- */
.size-picker {
    margin-bottom: 24px;
}

.size-picker__label {
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--gray-600);
    margin-bottom: 12px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.size-picker__options {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.size-picker__option {
    padding: 10px 18px;
    border-radius: var(--radius-sm);
    font-size: 0.875rem;
    font-weight: 600;
    background: var(--white);
    color: var(--text);
    border: 1.5px solid var(--gray-200);
    cursor: pointer;
    transition: all var(--duration) var(--ease);
    font-family: 'JetBrains Mono', monospace;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 2px;
    min-width: 64px;
}
.size-picker__option:hover {
    border-color: var(--frost);
    background: var(--frost-pale);
}
.size-picker__option.active {
    background: var(--navy);
    color: var(--white);
    border-color: var(--navy);
}
.size-picker__option-price {
    font-size: 0.688rem;
    color: var(--text-muted);
    font-weight: 500;
}
.size-picker__option.active .size-picker__option-price {
    color: rgba(255,255,255,0.6);
}

/* --- COLOR PICKER --- */
.color-picker {
    margin-bottom: 24px;
}

.color-picker__label {
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--gray-600);
    margin-bottom: 12px;
}

.color-picker__options {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
}

.color-picker__option {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 8px 14px;
    border-radius: var(--radius-sm);
    background: var(--white);
    border: 1.5px solid var(--gray-200);
    font-size: 0.813rem;
    font-weight: 500;
    cursor: pointer;
    transition: all var(--duration) var(--ease);
}
.color-picker__option:hover {
    border-color: var(--frost);
}
.color-picker__option.active {
    border-color: var(--navy);
    background: var(--gray-50);
}

.color-picker__swatch {
    width: 16px;
    height: 16px;
    border-radius: 50%;
    border: 1px solid rgba(0,0,0,0.1);
    flex-shrink: 0;
}

/* --- PRICE DISPLAY --- */
.price-display {
    padding: 24px;
    background: var(--gray-50);
    border-radius: var(--radius);
    border: 1px solid var(--gray-200);
    margin-bottom: 24px;
}

.price-display__label {
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--text-muted);
    margin-bottom: 8px;
}

.price-display__main {
    display: flex;
    align-items: baseline;
    gap: 12px;
}

.price-display__value {
    font-family: 'JetBrains Mono', monospace;
    font-size: 2.25rem;
    font-weight: 700;
    color: var(--navy);
    letter-spacing: -0.02em;
    line-height: 1;
}

.price-display__unit {
    font-size: 0.875rem;
    color: var(--text-muted);
    font-weight: 500;
}

.price-display__note {
    font-size: 0.75rem;
    color: var(--text-muted);
    margin-top: 8px;
    line-height: 1.5;
}

/* --- PRODUCT CTA --- */
.product-cta {
    display: flex;
    gap: 12px;
    margin-bottom: 32px;
}

.product-cta .btn {
    flex: 1;
}

/* --- KEY SPECS GRID --- */
.spec-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 12px;
    padding: 20px;
    background: var(--gray-50);
    border-radius: var(--radius);
    border: 1px solid var(--gray-200);
}

.spec-grid__item {
    text-align: center;
    padding: 8px;
}

.spec-grid__value {
    display: block;
    font-family: 'JetBrains Mono', monospace;
    font-size: 1.125rem;
    font-weight: 700;
    color: var(--navy);
    line-height: 1.2;
    margin-bottom: 4px;
}

.spec-grid__label {
    font-size: 0.688rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.04em;
    line-height: 1.3;
}

/* --- SPECS TABLE (full details) --- */
.specs-section {
    background: var(--gray-50);
    padding: 64px 0;
    border-top: 1px solid var(--gray-200);
}

.specs-table {
    background: var(--white);
    border-radius: var(--radius);
    border: 1px solid var(--gray-200);
    overflow: hidden;
}

.specs-table__row {
    display: grid;
    grid-template-columns: 280px 1fr;
    padding: 16px 24px;
    border-bottom: 1px solid var(--gray-100);
    font-size: 0.938rem;
}
.specs-table__row:last-child {
    border-bottom: none;
}
.specs-table__row--highlight {
    background: var(--frost-pale);
}
.specs-table__row--highlight .specs-table__name {
    color: var(--frost-deep);
    font-weight: 700;
}
.specs-table__row--highlight .specs-table__value {
    color: var(--frost-deep);
    font-weight: 700;
}

.specs-table__name {
    color: var(--text-muted);
    font-weight: 500;
    display: flex;
    align-items: center;
    gap: 8px;
}

.specs-table__value {
    color: var(--text);
    font-weight: 600;
    font-family: 'JetBrains Mono', monospace;
}

.specs-table__value--text {
    font-family: inherit;
    font-weight: 500;
}

/* --- FEATURES LIST --- */
.features {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
    margin: 32px 0;
}

.features__item {
    display: flex;
    align-items: flex-start;
    gap: 12px;
    padding: 20px;
    background: var(--white);
    border-radius: var(--radius-sm);
    border: 1px solid var(--gray-200);
    transition: all var(--duration) var(--ease);
}
.features__item:hover {
    border-color: var(--frost);
    transform: translateY(-2px);
    box-shadow: var(--shadow);
}

.features__icon {
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-xs);
    background: var(--frost-pale);
    color: var(--frost-deep);
    flex-shrink: 0;
}

.features__text {
    font-size: 0.938rem;
    color: var(--text);
    font-weight: 500;
    line-height: 1.5;
}

/* --- APPLICATIONS --- */
.applications {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 12px;
    margin: 24px 0;
}

.applications__item {
    padding: 16px 20px;
    background: var(--white);
    border-radius: var(--radius-sm);
    border: 1px solid var(--gray-200);
    font-size: 0.875rem;
    color: var(--text);
    font-weight: 500;
    display: flex;
    align-items: center;
    gap: 10px;
}
.applications__item::before {
    content: '';
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: var(--frost);
    flex-shrink: 0;
}

/* --- DESCRIPTION SECTION --- */
.description-section {
    padding: 64px 0;
    background: var(--white);
}

.description-section__grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 64px;
    align-items: start;
}

.description-section__block {
    display: flex;
    flex-direction: column;
}

.description-section__subtitle {
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--frost-deep);
    margin-bottom: 12px;
}

.description-section__heading {
    font-size: 1.5rem;
    font-weight: 700;
    letter-spacing: -0.01em;
    margin-bottom: 20px;
}

.description-section__text {
    font-size: 1rem;
    color: var(--text-muted);
    line-height: 1.75;
}

/* --- DOCS SECTION --- */
.docs-section {
    padding: 64px 0;
    background: var(--gray-50);
    border-top: 1px solid var(--gray-200);
}

.docs-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 16px;
}

.doc-link {
    display: flex;
    align-items: center;
    gap: 16px;
    padding: 20px;
    background: var(--white);
    border-radius: var(--radius-sm);
    border: 1px solid var(--gray-200);
    transition: all var(--duration) var(--ease);
}
.doc-link:hover {
    border-color: var(--frost);
    transform: translateY(-2px);
    box-shadow: var(--shadow);
}

.doc-link__icon {
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-sm);
    background: var(--frost-pale);
    color: var(--frost-deep);
    flex-shrink: 0;
}

.doc-link__body {
    flex: 1;
    min-width: 0;
}

.doc-link__title {
    font-size: 0.938rem;
    font-weight: 700;
    color: var(--text);
    margin-bottom: 4px;
    letter-spacing: -0.01em;
}

.doc-link__desc {
    font-size: 0.75rem;
    color: var(--text-muted);
}

.doc-link__arrow {
    color: var(--gray-400);
    transition: all var(--duration) var(--ease);
}
.doc-link:hover .doc-link__arrow {
    color: var(--accent);
    transform: translateX(4px);
}

/* --- RELATED SECTION --- */
.related-section {
    padding: 80px 0;
    background: var(--white);
}

.related-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
}

/* --- RESPONSIVE --- */
@media (max-width: 1024px) {
    body.page-internal .container {
        padding: 0 32px;
    }
    .catalog-layout {
        grid-template-columns: 1fr;
        gap: 20px;
    }
    .filters {
        position: static;
        max-height: none;
    }
    .filters.mobile-closed {
        display: none;
    }
    .filters-toggle {
        display: inline-flex;
    }
    .catalog-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    .product-head {
        grid-template-columns: 1fr;
        gap: 32px;
    }
    .gallery {
        position: static;
    }
    .gallery__main {
        height: 360px;
    }
    .specs-table__row {
        grid-template-columns: 1fr;
        gap: 4px;
    }
    .description-section__grid {
        grid-template-columns: 1fr;
        gap: 40px;
    }
    .docs-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    .related-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    .spec-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    .features {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 768px) {
    body.page-internal .container {
        padding: 0 20px;
    }
    .page-hero {
        padding: 100px 0 48px;
    }
    .page-hero__stats {
        flex-wrap: wrap;
        gap: 16px;
    }
    .catalog-page {
        padding: 32px 0 80px;
    }
    .catalog-grid {
        grid-template-columns: 1fr;
    }
    .sort-bar {
        flex-direction: column;
        align-items: stretch;
        gap: 12px;
    }
    .sort-bar__controls {
        justify-content: space-between;
    }
    .product-page {
        padding: 32px 0;
    }
    .product-cta {
        flex-direction: column;
    }
    .size-picker__options {
        gap: 6px;
    }
    .size-picker__option {
        min-width: 56px;
        padding: 8px 12px;
        font-size: 0.813rem;
    }
    .docs-grid,
    .related-grid {
        grid-template-columns: 1fr;
    }
    .price-display__value {
        font-size: 1.75rem;
    }
    .gallery__main {
        height: 280px;
    }
    .gallery__thumbs {
        grid-template-columns: repeat(4, 1fr);
    }
}

@media (max-width: 480px) {
    .spec-grid {
        grid-template-columns: 1fr 1fr;
    }
    .filters {
        padding: 20px;
    }
    .page-hero__title {
        font-size: 1.75rem;
    }
}