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

body {
    font-family: Arial, sans-serif;
    line-height: 1.6;
}

.container {
    width: 90%;
    margin: auto;
    overflow: hidden;
}

header {
    background: #333;
    color: #fff;
    padding: 1rem 0;
}

header .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

header h1 {
    margin: 0;
}

.nav-list {
    list-style: none;
    display: flex;
    position: relative;
}

.nav-list li {
    margin-left: 1rem;
}

.nav-list a {
    color: #fff;
    text-decoration: none;
}

.nav-list li:hover .dropdown {
    display: block;
}

.dropdown {
    display: none;
    position: absolute;
    background-color: #333;
    top: 100%;
    left: 0;
    width: 100%;
    z-index: 1;
}

.dropdown li {
    width: 100%;
    text-align: center;
    padding: 0.5rem 0;
}

.dropdown a {
    color: #fff;
}

.hero {
    background: #f4f4f4;
    padding: 2rem 0;
    text-align: center;
}

.hero h2 {
    margin-bottom: 1rem;
}

.services, .products {
    margin: 2rem 0;
}

.services h2, .products h2 {
    text-align: center;
    margin-bottom: 1rem;
}

.flex-row {
    display: flex;
    flex-wrap: wrap;
    gap: 2rem;
    justify-content: center;
}

.flex-column {
    flex: 1;
    min-width: 250px;
    background: #e2e2e2;
    padding: 1rem;
    border-radius: 8px;
    text-align: center;
}

footer {
    background: #333;
    color: #fff;
    text-align: center;
    padding: 1rem 0;
}

@media (max-width: 768px) {
    header .container {
        flex-direction: column;
        text-align: center;
    }

    .nav-list {
        flex-direction: column;
        width: 100%;
    }

    .nav-list li {
        margin: 0.5rem 0;
        position: relative;
    }

    .nav-list li:hover .dropdown {
        display: block;
        position: static;
    }

    .dropdown {
        display: none;
        background-color: #333;
        width: 100%;
    }
}