```css
/* =========================================
   ALGEMENE STIJLEN
========================================= */

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: Arial, Helvetica, sans-serif;
    background: #f8f8f6;
    color: #181818;
    line-height: 1.6;
}

a {
    color: inherit;
    text-decoration: none;
}

button,
input,
select {
    font: inherit;
}

.container {
    width: min(1150px, 90%);
    margin: 0 auto;
}


/* =========================================
   HEADER
========================================= */

.header {
    position: sticky;
    top: 0;
    z-index: 100;

    background: rgba(248, 248, 246, 0.95);
    border-bottom: 1px solid #e5e5e2;
    backdrop-filter: blur(10px);
}

.header-content {
    height: 75px;

    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 30px;
}

.logo {
    font-size: 21px;
    font-weight: 900;
    letter-spacing: -1px;
}

.logo span {
    font-weight: 400;
}

.navigation {
    display: flex;
    gap: 30px;
}

.navigation a {
    color: #555;
    font-size: 14px;
    transition: 0.2s;
}

.navigation a:hover {
    color: #000;
}

.cart-button {
    position: relative;

    border: 1px solid #ddd;
    background: white;
    padding: 10px 15px;
    border-radius: 30px;

    cursor: pointer;

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

.cart-button b {
    min-width: 21px;
    height: 21px;

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

    background: #181818;
    color: white;

    border-radius: 50%;
    font-size: 11px;
}


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

.hero {
    padding: 90px 0;
    background: #eeeeea;
}

.hero-content {
    min-height: 450px;

    display: grid;
    grid-template-columns: 1fr 1fr;
    align-items: center;
    gap: 60px;
}

.eyebrow {
    margin-bottom: 12px;

    color: #777;
    font-size: 12px;
    font-weight: bold;
    letter-spacing: 2px;
}

.hero h1 {
    font-size: clamp(45px, 6vw, 78px);
    line-height: 0.98;
    letter-spacing: -4px;
}

.hero h1 span {
    color: #777;
}

.hero-description {
    max-width: 500px;
    margin: 25px 0;

    color: #666;
    font-size: 17px;
}

.primary-button {
    display: inline-block;

    padding: 14px 24px;

    background: #181818;
    color: white;

    border-radius: 4px;

    font-weight: bold;
    font-size: 14px;

    transition: 0.2s;
}

.primary-button:hover {
    transform: translateY(-2px);
    background: #333;
}


/* HERO DECORATIE */

.hero-image {
    display: flex;
    justify-content: center;
    align-items: center;
}

.hero-circle {
    width: 330px;
    height: 330px;

    border-radius: 50%;

    background: #d7d7d0;

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

    font-size: 80px;
    color: white;
}


/* =========================================
   PRODUCTEN
========================================= */

.products-section {
    padding: 90px 0;
}

.section-header {
    margin-bottom: 40px;

    display: flex;
    justify-content: space-between;
    align-items: end;
    gap: 30px;
}

.section-header h2,
.about-section h2,
.contact-section h2 {
    font-size: 42px;
    line-height: 1.05;
    letter-spacing: -2px;
}

.filters {
    display: flex;
    gap: 10px;
}

.filters input,
.filters select {
    height: 43px;

    border: 1px solid #ddd;
    border-radius: 5px;

    background: white;

    padding: 0 13px;

    outline: none;
}

.filters input:focus,
.filters select:focus {
    border-color: #999;
}


/* PRODUCT GRID */

.products-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 25px;
}

.product-card {
    background: white;
    border: 1px solid #e8e8e5;

    transition: 0.2s;
}

.product-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 15px 40px rgba(0, 0, 0, 0.06);
}

.product-image {
    height: 280px;

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

    background: #eeeeeb;

    font-size: 65px;
}

.product-info {
    padding: 20px;
}

.product-category {
    color: #888;
    font-size: 11px;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.product-name {
    margin: 5px 0;

    font-size: 19px;
    font-weight: bold;
}

.product-description {
    color: #777;
    font-size: 13px;
    margin-bottom: 15px;
}

.product-bottom {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.product-price {
    font-weight: bold;
}

.add-button {
    border: 0;

    background: #181818;
    color: white;

    padding: 9px 13px;

    border-radius: 4px;

    cursor: pointer;

    font-size: 12px;
}

.add-button:hover {
    background: #444;
}

.no-products {
    display: none;

    text-align: center;
    color: #777;

    padding: 50px;
}


/* =========================================
   OVER ONS
========================================= */

.about-section {
    padding: 90px 0;

    background: #181818;
    color: white;
}

.about-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 80px;
    align-items: center;
}

.about-section .eyebrow {
    color: #999;
}

.about-section h2 {
    font-size: 48px;
}

.about-content > p {
    color: #aaa;
    font-size: 18px;
}


/* =========================================
   CONTACT
========================================= */

.contact-section {
    padding: 100px 0;
    text-align: center;
}

.contact-section .eyebrow {
    margin-bottom: 10px;
}

.contact-section p {
    color: #777;
    margin: 15px 0 25px;
}


/* =========================================
   FOOTER
========================================= */

.footer {
    border-top: 1px solid #ddd;
    padding: 35px 0;
}

.footer-content {
    display: flex;
    justify-content: space-between;
    gap: 30px;
}

.footer p {
    color: #888;
    font-size: 12px;
    margin-top: 5px;
}

.footer-links {
    display: flex;
    gap: 20px;
    font-size: 12px;
    color: #666;
}


/* =========================================
   WINKELMAND
========================================= */

.cart-overlay {
    position: fixed;
    inset: 0;
    z-index: 200;

    display: none;

    background: rgba(0, 0, 0, 0.45);
}

.cart-overlay.active {
    display: flex;
    justify-content: flex-end;
}

.cart {
    width: min(450px, 100%);
    height: 100%;

    background: white;

    display: flex;
    flex-direction: column;

    animation: slideIn 0.25s ease;
}

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

    to {
        transform: translateX(0);
    }
}

.cart-header {
    padding: 25px;

    border-bottom: 1px solid #eee;

    display: flex;
    justify-content: space-between;
    align-items: center;
}

.cart-header h2 {
    font-size: 23px;
}

.close-button {
    width: 35px;
    height: 35px;

    border: 0;
    background: #f2f2f2;

    border-radius: 50%;

    font-size: 25px;
    cursor: pointer;
}

.cart-items {
    flex: 1;

    overflow-y: auto;

    padding: 20px;
}

.empty-cart {
    text-align: center;
    color: #888;
    padding: 50px 20px;
}

.cart-item {
    display: grid;
    grid-template-columns: 60px 1fr auto;
    gap: 15px;

    padding: 15px 0;

    border-bottom: 1px solid #eee;
}

.cart-item-image {
    width: 60px;
    height: 60px;

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

    background: #eee;

    font-size: 25px;
}

.cart-item-name {
    font-weight: bold;
    font-size: 14px;
}

.cart-item-price {
    color: #777;
    font-size: 13px;
}

.quantity-controls {
    display: flex;
    align-items: center;
    gap: 8px;

    margin-top: 7px;
}

.quantity-controls button {
    width: 23px;
    height: 23px;

    border: 1px solid #ddd;
    background: white;

    cursor: pointer;
}

.remove-button {
    border: 0;
    background: none;
    color: #999;
    cursor: pointer;
    font-size: 11px;
    margin-top: 6px;
}

.cart-footer {
    padding: 25px;

    border-top: 1px solid #eee;
}

.cart-total {
    display: flex;
    justify-content: space-between;

    margin-bottom: 20px;

    font-size: 18px;
}

.checkout-button {
    width: 100%;

    border: 0;

    padding: 15px;

    background: #181818;
    color: white;

    cursor: pointer;

    border-radius: 4px;

    font-weight: bold;
}

.checkout-button:hover {
    background: #333;
}


/* =========================================
   MOBIEL
========================================= */

@media (max-width: 800px) {

    .navigation {
        display: none;
    }

    .hero {
        padding: 60px 0;
    }

    .hero-content {
        grid-template-columns: 1fr;
        text-align: center;
    }

    .hero-description {
        margin-left: auto;
        margin-right: auto;
    }

    .hero-circle {
        width: 240px;
        height: 240px;
    }

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

    .filters {
        flex-direction: column;
    }

    .products-grid {
        grid-template-columns: 1fr 1fr;
    }

    .about-content {
        grid-template-columns: 1fr;
        gap: 30px;
    }

    .footer-content {
        flex-direction: column;
    }
}


@media (max-width: 500px) {

    .header-content {
        height: 65px;
    }

    .cart-button span {
        display: none;
    }

    .hero h1 {
        font-size: 48px;
        letter-spacing: -3px;
    }

    .products-grid {
        grid-template-columns: 1fr;
    }

    .section-header h2,
    .about-section h2,
    .contact-section h2 {
        font-size: 34px;
    }

    .product-image {
        height: 240px;
    }
}
```