```css
/* =========================
   GENERAL
========================= */

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: Arial, Helvetica, sans-serif;
    color: #222;
    line-height: 1.6;
}

img {
    width: 100%;
    display: block;
}

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

.container {
    width: 90%;
    max-width: 1200px;
    margin: auto;
}


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

.header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    background: rgba(255, 255, 255, 0.96);
    z-index: 1000;
    box-shadow: 0 2px 10px rgba(0,0,0,0.08);
}

.nav-container {
    height: 75px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.logo {
    font-size: 22px;
    font-weight: bold;
    letter-spacing: 1px;
}

.nav {
    display: flex;
    gap: 35px;
}

.nav a {
    font-size: 15px;
    font-weight: 500;
    transition: 0.3s;
}

.nav a:hover {
    opacity: 0.5;
}

.menu-button {
    display: none;
    border: none;
    background: none;
    font-size: 28px;
    cursor: pointer;
}


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

.hero {
    min-height: 100vh;

    background-image:
        url("images/hero.jpg");

    background-size: cover;
    background-position: center;

    position: relative;

    display: flex;
    align-items: center;
}

.hero-overlay {
    position: absolute;
    inset: 0;

    background: rgba(0, 0, 0, 0.55);
}

.hero-content {
    position: relative;
    z-index: 1;
    color: white;
}

.hero-small-title {
    font-size: 14px;
    letter-spacing: 3px;
    margin-bottom: 20px;
}

.hero h1 {
    font-size: clamp(48px, 7vw, 90px);
    line-height: 1.05;
    margin-bottom: 25px;
}

.hero h1 span {
    font-weight: normal;
}

.hero-description {
    max-width: 550px;
    font-size: 18px;
    margin-bottom: 35px;
}

.hero-buttons {
    display: flex;
    gap: 15px;
    flex-wrap: wrap;
}

.button {
    padding: 14px 28px;
    border-radius: 3px;
    transition: 0.3s;
}

.button-primary {
    background: white;
    color: #111;
}

.button-secondary {
    border: 1px solid white;
    color: white;
}

.button:hover {
    transform: translateY(-2px);
}


/* =========================
   SECTIONS
========================= */

.section {
    padding: 100px 0;
}

.section-light {
    background: #f6f6f6;
}

.section-heading {
    margin-bottom: 50px;
}

.section-heading.center {
    text-align: center;
}

.section-label {
    font-size: 13px;
    letter-spacing: 3px;
    font-weight: bold;
    margin-bottom: 10px;
}

.section-heading h2 {
    font-size: 42px;
    line-height: 1.2;
}

.section-heading p:not(.section-label) {
    margin-top: 15px;
    color: #666;
}


/* =========================
   ABOUT
========================= */

.about-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 70px;
    align-items: center;
}

.about-image img {
    height: 500px;
    object-fit: cover;
}

.about-content h3 {
    font-size: 30px;
    margin-bottom: 20px;
}

.about-content p {
    margin-bottom: 18px;
    color: #555;
}

.text-link {
    display: inline-block;
    margin-top: 15px;
    font-weight: bold;
}


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

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

    gap: 30px;
}

.product-card {
    background: white;
    overflow: hidden;
    transition: 0.3s;
}

.product-card:hover {
    transform: translateY(-5px);
    box-shadow:
        0 15px 35px rgba(0,0,0,0.1);
}

.product-card img {
    height: 260px;
    object-fit: cover;
}

.product-content {
    padding: 25px;
}

.product-content h3 {
    font-size: 23px;
    margin-bottom: 10px;
}

.product-content p {
    color: #666;
}


/* =========================
   FEATURES
========================= */

.features-grid {
    display: grid;
    grid-template-columns:
        repeat(4, 1fr);

    gap: 30px;
}

.feature {
    text-align: center;
    padding: 20px;
}

.feature-icon {
    font-size: 35px;
    margin-bottom: 15px;
}

.feature h3 {
    margin-bottom: 10px;
}

.feature p {
    color: #666;
}


/* =========================
   GALLERY
========================= */

.gallery-grid {
    display: grid;
    grid-template-columns:
        repeat(3, 1fr);

    gap: 15px;
}

.gallery-grid img {
    height: 280px;
    object-fit: cover;
    transition: 0.3s;
}

.gallery-grid img:hover {
    transform: scale(1.02);
}


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

.contact-section {
    background: #111;
    color: white;
    padding: 90px 0;
}

.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 80px;
}

.contact-section h2 {
    font-size: 50px;
    margin-bottom: 20px;
}

.contact-section p {
    color: #ccc;
}

.contact-details {
    display: flex;
    flex-direction: column;
    gap: 30px;
}

.contact-item strong {
    display: block;
    margin-bottom: 5px;
}

.contact-item a {
    color: #ddd;
}


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

.footer {
    background: #080808;
    color: white;
    padding: 35px 0;
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 20px;
}

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


/* =========================
   MOBILE
========================= */

@media (max-width: 800px) {

    .nav {
        display: none;

        position: absolute;
        top: 75px;
        left: 0;

        width: 100%;

        background: white;

        flex-direction: column;

        padding: 25px;

        gap: 20px;
    }

    .nav.active {
        display: flex;
    }

    .menu-button {
        display: block;
    }

    .about-grid,
    .contact-grid {
        grid-template-columns: 1fr;
    }

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

    .features-grid {
        grid-template-columns:
            repeat(2, 1fr);
    }

    .gallery-grid {
        grid-template-columns:
            repeat(2, 1fr);
    }

    .about-image img {
        height: 350px;
    }

    .contact-grid {
        gap: 40px;
    }

    .footer-content {
        flex-direction: column;
        align-items: flex-start;
    }
}


@media (max-width: 500px) {

    .section {
        padding: 70px 0;
    }

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

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

    .hero h1 {
        font-size: 50px;
    }

}
```