* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}
body {
    font-family: Arial, sans-serif;
    line-height: 1.6;
    background-color: #f4f4f4;
    color: #333;
}
header {
    background-color: #111;
    color: #fff;
    padding: 1rem;
    text-align: center;
}
nav ul {
    list-style: none;
    display: flex;
    justify-content: center;
    margin-top: 0.5rem;
}
nav ul li {
    margin: 0 1rem;
}
nav ul li a {
    color: #fff;
    text-decoration: none;
}
.product-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px,1fr));
    gap: 1rem;
    padding: 1rem;
}
.product-card {
    background-color: #fff;
    border-radius: 8px;
    padding: 1rem;
    text-align: center;
    box-shadow: 0 2px 5px rgba(0,0,0,0.1);
}
.product-card img {
    max-width: 100%;
    height: auto;
}
.product-card .price {
    font-weight: bold;
    margin: 0.5rem 0;
}
.product-card button {
    background-color: #111;
    color: #fff;
    border: none;
    padding: 0.5rem 1rem;
    border-radius: 4px;
    cursor: pointer;
}
.product-card button:hover {
    background-color: #333;
}
footer {
    text-align: center;
    padding: 1rem;
    background-color: #111;
    color: #fff;
    margin-top: 1rem;
}