body {
    font-family: Arial, sans-serif;
    margin: 0;
    padding: 0;
}

header {
    background: #d32f2f;
    color: #fff;
    padding: 20px;
    text-align: center;
}

header h1 {
    margin: 0;
}

nav a {
    color: #fff;
    margin: 0 15px;
    text-decoration: none;
    font-weight: bold;
}

.hero {
    background: url('https://source.unsplash.com/1600x600/?construction,materials') center/cover;
    color: #fff;
    text-align: center;
    padding: 100px 20px;
}

.hero h2 {
    font-size: 2.5em;
    margin-bottom: 20px;
}

.cta-btn {
    background: #fbc02d;
    color: #000;
    padding: 10px 20px;
    text-decoration: none;
    border-radius: 5px;
    font-weight: bold;
}

section {
    padding: 40px 20px;
}

.about-image {
    width: 100%;
    max-width: 600px;
    display: block;
    margin: 20px auto;
}

.products {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 20px;
}

.product-card {
    border: 1px solid #ccc;
    border-radius: 5px;
    padding: 10px;
    text-align: center;
}

.product-card img {
    width: 100%;
    height: 150px;
    object-fit: cover;
}

.product-card button {
    background: #d32f2f;
    color: #fff;
    padding: 10px 15px;
    border: none;
    cursor: pointer;
    margin-top: 10px;
    border-radius: 5px;
}

footer {
    background: #333;
    color: #fff;
    text-align: center;
    padding: 10px;
}

.whatsapp-button {
    position: fixed;
    bottom: 20px;
    right: 20px;
    background-color: #25d366;
    color: white;
    border-radius: 50%;
    width: 60px;
    height: 60px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 30px;
    text-decoration: none;
}