:root {
        --primary-black: #111111;
        --secondary-gray: #777777;
        --light-bg: #f8f8f8;
        --accent: #ff3b30;
        --border-color: #eeeeee;
    }

    * {
        margin: 0;
        padding: 0;
        box-sizing: border-box;
        font-family: "Segoe UI", Tahoma, Arial, sans-serif;
        -webkit-tap-highlight-color: transparent;
    }

    body {
        background: #fff;
        color: var(--primary-black);
        line-height: 1.6;
    }

    .container {
        max-width: 600px;
        margin: 0 auto;
        padding-bottom: 40px;
    }

    header {
        padding: 20px 24px;
        display: flex;
        GAP: 100PX;
        justify-content: flex-start;
        align-items: flex-end;
        position: sticky;
        top: 0;
        background: #fff;
        z-index: 100;
        border-bottom: 1px solid var(--border-color);
    }

    header h1 {
        font-size: 20px;
        font-weight: 900;
    }

    .filter-section {
        padding: 16px 20px;
        background: #fff;
    }

    .filter-label {
        font-size: 13px;
        font-weight: 700;
        margin-bottom: 12px;
        display: block;
        color: var(--secondary-gray);
    }

    .chip-group {
        display: flex;
        gap: 8px;
        overflow-x: auto;
        padding-bottom: 8px;
        scrollbar-width: none;
        margin-bottom: 14px;
    }

    .chip-group::-webkit-scrollbar {
        display: none;
    }

    .chip {
        padding: 10px 20px;
        background: var(--light-bg);
        border: 1px solid var(--border-color);
        border-radius: 50px;
        font-size: 13px;
        white-space: nowrap;
        cursor: pointer;
        transition: all 0.2s ease;
    }

    .chip.active {
        background: var(--primary-black);
        color: #fff;
        border-color: var(--primary-black);
    }

    .sort-bar {
        padding: 10px 20px;
        display: flex;
        align-items: center;
        justify-content: space-between;
        gap: 10px;
        border-bottom: 1px solid var(--border-color);
    }

    .result-count {
        font-size: 12px;
        color: var(--secondary-gray);
        white-space: nowrap;
    }

    .sort-trigger {
        padding: 10px 14px;
        border-radius: 12px;
        border: 1px solid var(--border-color);
        background: var(--light-bg);
        font-size: 13px;
        cursor: pointer;
        display: flex;
        align-items: center;
        justify-content: space-between;
        gap: 8px;
        color: #111;
        min-width: 150px;
    }

    .sort-trigger svg {
        width: 16px;
        height: 16px;
        flex-shrink: 0;
        color: var(--secondary-gray);
    }

    .product-grid {
        display: grid;
        grid-template-columns: repeat(2, 1fr);
        gap: 15px;
        padding: 20px;
    }

    .product-card {
        position: relative;
        text-decoration: none;
        color: inherit;
        animation: fadeIn 0.4s ease forwards;
    }

    @keyframes fadeIn {
        from {
            opacity: 0;
            transform: translateY(10px);
        }

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

    .img-wrap {
        width: 100%;
        aspect-ratio: 3/4;
        border-radius: 20px;
        overflow: hidden;
        background: #f3f3f3;
        margin-bottom: 12px;
    }

    .img-wrap img {
        width: 100%;
        height: 100%;
        object-fit: cover;
        transition: transform 0.35s ease;
    }

    @media (hover: hover) {
        .product-card:hover .img-wrap img {
            transform: scale(1.06);
        }

        .chip:hover {
            background: #ececec;
        }

        .chip.active:hover {
            background: var(--primary-black);
        }
    }

    .badge {
        position: absolute;
        top: 10px;
        right: 10px;
        background: var(--primary-black);
        color: #fff;
        padding: 4px 10px;
        border-radius: 8px;
        font-size: 10px;
        font-weight: 700;
    }

    .product-info h3 {
        font-size: 14px;
        font-weight: 700;
        margin-bottom: 4px;
        white-space: nowrap;
        overflow: hidden;
        text-overflow: ellipsis;
    }

    .product-info .price {
        font-size: 15px;
        font-weight: 900;
    }

    .product-info .price span {
        font-size: 11px;
        font-weight: normal;
        margin-right: 4px;
        color: var(--secondary-gray);
    }

    .empty-state {
        grid-column: 1 / -1;
        text-align: center;
        padding: 40px;
        color: var(--secondary-gray);
    }

    /* ---------- اسکلتون لودینگ ---------- */
    .skeleton-card .img-wrap {
        background: linear-gradient(90deg, #eee 25%, #f5f5f5 37%, #eee 63%);
        background-size: 400% 100%;
        animation: shimmer 1.4s ease infinite;
    }

    .skeleton-line {
        height: 12px;
        background: #eee;
        border-radius: 6px;
        margin-bottom: 6px;
        width: 70%;
    }

    @keyframes shimmer {
        0% {
            background-position: 100% 0;
        }

        100% {
            background-position: -100% 0;
        }
    }

    /* ---------- دکمه بارگذاری بیشتر ---------- */
    .load-more-wrap {
        grid-column: 1 / -1;
        display: flex;
        justify-content: center;
        padding: 10px 0 20px;
    }

    .load-more-btn {
        padding: 12px 28px;
        border: 1px solid var(--border-color);
        background: var(--light-bg);
        border-radius: 999px;
        font-size: 13px;
        font-weight: 700;
        cursor: pointer;
        transition: background 0.2s ease, transform 0.15s ease;
    }

    .load-more-btn:disabled {
        opacity: 0.6;
        cursor: default;
    }

    @media (hover: hover) {
        .load-more-btn:not(:disabled):hover {
            background: #ececec;
        }
    }

    .load-more-btn:not(:disabled):active {
        transform: scale(0.97);
    }

    /* ---------- متن سئوی پایین صفحه ---------- */
    .seo-footer {
        padding: 30px 24px 50px;
        border-top: 1px solid var(--border-color);
        margin-top: 10px;
    }

    .seo-footer h2 {
        font-size: 15px;
        margin-bottom: 10px;
    }

    .seo-footer p {
        font-size: 13px;
        line-height: 2;
        color: #555;
    }

    /* ---------- پاپ‌آپ Sort (Bottom Sheet) ---------- */
    .sheet-overlay {
        position: fixed;
        inset: 0;
        background: rgba(0, 0, 0, 0.45);
        opacity: 0;
        visibility: hidden;
        transition: opacity 0.25s ease;
        z-index: 300;
    }

    .sheet-overlay.show {
        opacity: 1;
        visibility: visible;
    }

    .sort-sheet {
        position: fixed;
        left: 50%;
        bottom: 0;
        transform: translate(-50%, 100%);
        width: 100%;
        max-width: 600px;
        background: #fff;
        border-radius: 22px 22px 0 0;
        z-index: 310;
        transition: transform 0.3s cubic-bezier(.2, .9, .3, 1);
        box-shadow: 0 -10px 40px rgba(0, 0, 0, 0.2);
    }

    .sort-sheet.show {
        transform: translate(-50%, 0);
    }

    .sheet-handle {
        width: 40px;
        height: 4px;
        background: #ddd;
        border-radius: 999px;
        margin: 12px auto 6px;
    }

    .sort-sheet h3 {
        text-align: center;
        font-size: 15px;
        font-weight: 900;
        padding: 6px 0 14px;
        border-bottom: 1px solid #f0f0f0;
    }

    .sort-option {
        display: flex;
        align-items: center;
        justify-content: space-between;
        padding: 16px 24px;
        font-size: 14px;
        font-weight: 700;
        cursor: pointer;
    }

    .sort-option:hover {
        background: #f7f7f7;
    }

    .sort-option.active {
        color: var(--primary-black);
    }

    .sort-option .check {
        width: 18px;
        height: 18px;
        color: var(--primary-black);
        visibility: hidden;
    }

    .sort-option.active .check {
        visibility: visible;
    }

    .sheet-cancel {
        display: block;
        width: calc(100% - 40px);
        margin: 6px 20px 24px;
        padding: 14px;
        text-align: center;
        background: var(--light-bg);
        border: none;
        border-radius: 14px;
        font-size: 14px;
        font-weight: 700;
        color: #333;
        cursor: pointer;
    }

    @media (max-width: 400px) {
        .product-grid {
            gap: 10px;
            padding: 12px;
        }

        .product-info h3 {
            font-size: 13px;
        }
    }

    @media (min-width: 700px) and (max-width: 1023px) {
        .container {
            max-width: 900px;
        }

        header {
            padding: 26px 36px;
        }

        header h1 {
            font-size: 24px;
        }

        .filter-section {
            padding: 20px 36px;
        }

        .chip {
            padding: 11px 24px;
            font-size: 14px;
        }

        .sort-bar {
            padding: 14px 36px;
        }

        .product-grid {
            grid-template-columns: repeat(3, 1fr);
            gap: 22px;
            padding: 30px 36px;
        }

        .product-info h3 {
            font-size: 15px;
        }

        .product-info .price {
            font-size: 16px;
        }

        .seo-footer {
            padding: 40px 36px 60px;
        }
    }

    /* =======================================================
       دسکتاپ - لایوت واقعی: سایدبار فیلتر + گرید محصولات
       ======================================================= */
    @media (min-width: 1024px) {
        .container {
            max-width: 1360px;
            display: grid;
            grid-template-columns: 280px 1fr;
            column-gap: 44px;
            grid-template-areas:
                "header header"
                "sidebar sortbar"
                "sidebar grid"
                "sidebar seo";
            align-items: start;
            padding: 0 40px;
        }

        header {
            padding: 30px 0;
            position: static;
        }

        header h1 {
            font-size: 26px;
        }

        .filter-section {
            grid-area: sidebar;
            padding: 0;
            background: transparent;
            position: sticky;
            top: 30px;
            border-left: 1px solid var(--border-color);
            padding-left: 32px;
        }

        .filter-label {
            font-size: 13px;
            margin-bottom: 14px;
        }

        .chip-group {
            flex-direction: column;
            overflow: visible;
            gap: 6px;
            margin-bottom: 26px;
        }

        .chip {
            width: 100%;
            text-align: right;
            border-radius: 10px;
            padding: 11px 16px;
        }

        .sort-bar {
            grid-area: sortbar;
            padding: 0 0 20px;
            border-bottom: none;
        }

        .sort-trigger {
            max-width: 220px;
            margin-right: auto;
        }

        .product-grid {
            grid-area: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 26px;
            padding: 0 0 40px;
        }

        .img-wrap {
            border-radius: 18px;
        }

        .seo-footer {
            grid-area: seo;
            padding: 30px 0 60px;
            margin-top: 0;
        }
    }

    @media (min-width: 1300px) {
        .product-grid {
            grid-template-columns: repeat(4, 1fr);
        }
    }

    @media (min-width: 1500px) {
        .container {
            max-width: 1500px;
        }
    }

    a,
    button {
        transition: opacity 0.2s ease, background 0.2s ease, color 0.2s ease, transform 0.15s ease;
    }

    a:focus-visible,
    button:focus-visible,
    [tabindex]:focus-visible {
        outline: 2px solid #111;
        outline-offset: 2px;
        border-radius: 4px;
    }