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

header {
    background-color: #007BFF;
    color: white;
    padding: 20px;
    text-align: center;
}

nav ul {
    list-style-type: none;
    margin: 0;
    padding: 0;
    display: flex;
    justify-content: center;
}

nav ul li {
    margin: 0 10px;
}

nav ul li a {
    color: white;
    text-decoration: none;
}

.hero {
    background-color: #f4f4f4;
    text-align: center;
    padding: 100px 0;
}

.btn {
    display: inline - block;
    background-color: #007BFF;
    color: white;
    padding: 10px 20px;
    text-decoration: none;
    border - radius: 5px;
}

.product - categories {
    display: flex;
    justify-content: center;
    flex - wrap: wrap;
    padding: 50px 0;
}

.category {
    width: 300px;
    margin: 20px;
    text-align: center;
}

.category img {
    width: 100%;
    height: auto;
}

.product - list {
    display: flex;
    justify-content: center;
    flex - wrap: wrap;
    list-style-type: none;
    padding: 0;
}

.product - list li {
    width: 300px;
    margin: 20px;
    text-align: center;
}

.product - list li img {
    width: 100%;
    height: auto;
}

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