```css
/* =========================================
   HOME PAGE - FULLY RESPONSIVE
   Mobile → Tablet → Desktop → Large LED
========================================= */

/* ===== HERO ===== */

.hero {
    background: linear-gradient(120deg, #e8f5e9, #d4edda);
    width: 100%;
    overflow: hidden;
}

.hero-inner {
    width: 100%;
    max-width: 1400px;
    margin: 0 auto;
    padding: 60px 24px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 40px;
    box-sizing: border-box;
}

.hero-text {
    flex: 1;
    min-width: 0;
}

.hero-text h1 {
    font-size: clamp(28px, 3vw, 44px);
    line-height: 1.2;
    color: var(--green-dark);
    margin: 0 0 16px;
}

.hero-text h1 span {
    color: var(--orange);
}

.hero-text p {
    color: var(--text-muted);
    margin: 0 0 24px;
    max-width: 520px;
    font-size: clamp(14px, 1.3vw, 17px);
    line-height: 1.6;
}

.hero-img {
    flex: 0 0 auto;
    font-size: clamp(55px, 7vw, 100px);
    line-height: 1;
}


/* =========================================
   GENERAL SECTION
========================================= */

.section-title {
    font-size: clamp(20px, 2vw, 28px);
    line-height: 1.3;
    color: var(--green-dark);
    margin: 40px 0 20px;
    border-left: 5px solid var(--orange);
    padding-left: 12px;
}


/* =========================================
   CATEGORY GRID
========================================= */

.category-grid {
    width: 100%;
    display: grid;

    /* Desktop */
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));

    gap: 16px;
    box-sizing: border-box;
}

.category-card {
    width: 100%;
    min-width: 0;
    box-sizing: border-box;

    background: #fff;
    border: 1px solid var(--border);
    border-radius: 10px;

    text-align: center;
    padding: 24px 12px;

    font-weight: 600;
    color: var(--green-dark);

    transition:
        transform 0.2s ease,
        box-shadow 0.2s ease,
        border-color 0.2s ease;

    word-break: break-word;
}

.category-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 6px 16px rgba(0, 0, 0, 0.08);
    border-color: var(--green);
}

.cat-icon {
    font-size: clamp(25px, 3vw, 34px);
    margin-bottom: 10px;
}


/* =========================================
   PRODUCT GRID
========================================= */

.product-grid {
    width: 100%;

    display: grid;

    /* Desktop */
    grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));

    gap: 20px;
    box-sizing: border-box;
}


/* =========================================
   PRODUCT CARD
========================================= */

.product-card {
    width: 100%;
    min-width: 0;
    box-sizing: border-box;

    background: #fff;
    border: 1px solid var(--border);
    border-radius: 10px;

    overflow: hidden;
    position: relative;

    transition:
        transform 0.2s ease,
        box-shadow 0.2s ease;
}

.product-card:hover {
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.1);
    transform: translateY(-2px);
}


/* =========================================
   BADGES
========================================= */

.badge-discount {
    position: absolute;
    top: 10px;
    left: 10px;

    background: var(--orange);
    color: #fff;

    padding: 3px 8px;
    border-radius: 4px;

    font-size: 12px;
    font-weight: 700;

    z-index: 2;
}

.badge-outstock {
    position: absolute;
    top: 10px;
    right: 10px;

    background: #b3261e;
    color: #fff;

    padding: 3px 8px;
    border-radius: 4px;

    font-size: 12px;

    z-index: 2;
}


/* =========================================
   PRODUCT IMAGE
========================================= */

.product-img {
    width: 100%;
    height: 180px;

    background: var(--green-light);

    display: flex;
    align-items: center;
    justify-content: center;

    overflow: hidden;
}

.product-img img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
}

.no-image {
    font-size: clamp(45px, 6vw, 65px);
}


/* =========================================
   PRODUCT INFORMATION
========================================= */

.product-info {
    padding: 14px;
    box-sizing: border-box;
}

.product-name {
    display: block;

    font-weight: 600;
    color: var(--text-dark);

    margin-bottom: 8px;

    min-height: 42px;

    line-height: 1.4;

    overflow-wrap: anywhere;
}

.product-price {
    margin-bottom: 10px;
}

.old-price {
    text-decoration: line-through;
    color: #999;

    font-size: 13px;
    margin-right: 8px;
}

.new-price {
    color: var(--green-dark);
    font-weight: 700;
    font-size: 17px;
}


/* =========================================
   BUTTON
========================================= */

.btn-block {
    width: 100%;
    padding: 10px;
    box-sizing: border-box;
}


/* =========================================
   LARGE SCREENS / LED / 4K
========================================= */

@media (min-width: 1600px) {

    .hero-inner {
        max-width: 1500px;
        padding: 80px 30px;
    }

    .category-grid {
        grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
        gap: 20px;
    }

    .product-grid {
        grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
        gap: 24px;
    }

    .product-img {
        height: 210px;
    }

    .product-info {
        padding: 18px;
    }
}


/* =========================================
   TABLET
   768px - 1199px
========================================= */

@media (min-width: 768px) and (max-width: 1199px) {

    .hero-inner {
        padding: 50px 20px;
        gap: 30px;
    }

    .category-grid {
        grid-template-columns: repeat(3, 1fr);
        gap: 14px;
    }

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

    .product-img {
        height: 170px;
    }
}


/* =========================================
   MOBILE
   481px - 767px
========================================= */

@media (min-width: 481px) and (max-width: 767px) {

    .hero-inner {
        flex-direction: column;
        text-align: center;

        padding: 40px 16px;
        gap: 25px;
    }

    .hero-text p {
        margin-left: auto;
        margin-right: auto;
    }

    .hero-img {
        font-size: 65px;
    }

    .section-title {
        margin: 30px 0 16px;
    }

    /* Categories */
    .category-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 12px;
    }

    .category-card {
        padding: 20px 8px;
    }

    /* Products - 2 SIDE BY SIDE */
    .product-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
        gap: 12px;
    }

    .product-img {
        height: 150px;
    }

    .product-info {
        padding: 10px;
    }

    .product-name {
        font-size: 14px;
        min-height: 40px;
    }

    .old-price {
        font-size: 11px;
        margin-right: 4px;
    }

    .new-price {
        font-size: 15px;
    }

    .badge-discount,
    .badge-outstock {
        top: 7px;
        padding: 3px 6px;
        font-size: 10px;
    }
}


/* =========================================
   SMALL MOBILE
   Up to 480px
========================================= */

@media (max-width: 480px) {

    .hero-inner {
        width: 100%;

        flex-direction: column;
        text-align: center;

        padding: 30px 12px;
        gap: 20px;
    }

    .hero-text {
        width: 100%;
    }

    .hero-text h1 {
        font-size: 27px;
        line-height: 1.25;
    }

    .hero-text p {
        width: 100%;
        font-size: 14px;
        line-height: 1.5;

        margin-left: auto;
        margin-right: auto;
    }

    .hero-img {
        font-size: 55px;
    }


    /* ===== SECTION ===== */

    .section-title {
        font-size: 20px;
        margin: 28px 0 16px;
        padding-left: 9px;
        border-left-width: 4px;
    }


    /* ===== CATEGORIES ===== */

    .category-grid {
        width: 100%;

        /* Full width 2 columns */
        grid-template-columns: repeat(2, minmax(0, 1fr));

        gap: 10px;
    }

    .category-card {
        width: 100%;
        padding: 18px 6px;

        font-size: 13px;
        border-radius: 8px;
    }

    .cat-icon {
        font-size: 25px;
        margin-bottom: 7px;
    }


    /* ===== PRODUCTS ===== */

    .product-grid {
        width: 100%;

        /* EXACTLY 2 PRODUCTS PER ROW */
        grid-template-columns: repeat(2, minmax(0, 1fr));

        gap: 10px;
    }

    .product-card {
        border-radius: 8px;
    }

    .product-img {
        width: 100%;
        height: 130px;
    }

    .no-image {
        font-size: 45px;
    }

    .product-info {
        padding: 9px;
    }

    .product-name {
        font-size: 13px;
        line-height: 1.35;

        min-height: 35px;

        margin-bottom: 6px;
    }

    .product-price {
        margin-bottom: 8px;
        line-height: 1.3;
    }

    .old-price {
        display: block;

        font-size: 10px;
        margin: 0 0 2px;
    }

    .new-price {
        font-size: 14px;
    }

    .btn-block {
        width: 100%;
        padding: 8px 5px;

        font-size: 12px;
    }

    .badge-discount,
    .badge-outstock {
        top: 6px;

        padding: 2px 5px;

        font-size: 9px;
        border-radius: 3px;
    }

    .badge-discount {
        left: 6px;
    }

    .badge-outstock {
        right: 6px;
    }
}


/* =========================================
   VERY SMALL PHONES
   Up to 360px
========================================= */

@media (max-width: 360px) {

    .hero-inner {
        padding-left: 10px;
        padding-right: 10px;
    }

    .hero-text h1 {
        font-size: 24px;
    }

    .category-grid {
        gap: 8px;
    }

    .category-card {
        padding: 15px 5px;
        font-size: 12px;
    }

    .product-grid {
        gap: 8px;
    }

    .product-img {
        height: 115px;
    }

    .product-info {
        padding: 8px;
    }

    .product-name {
        font-size: 12px;
    }

    .new-price {
        font-size: 13px;
    }

    .btn-block {
        font-size: 11px;
        padding: 7px 3px;
    }
}


/* =========================================
   PREVENT HORIZONTAL OVERFLOW
========================================= */

html,
body {
    width: 100%;
    max-width: 100%;
    overflow-x: hidden;
}

*,
*::before,
*::after {
    box-sizing: border-box;
}

img {
    max-width: 100%;
}
```