body {
    font-family: 'Arial', sans-serif;
    margin: 0;
    padding: 0;
    display: flex;
    flex-direction: row;
}

header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: linear-gradient(90deg,#4facfe,#00f2fe);
    color: white;
    padding: 15px 20px;
    display: flex;
    justify-content: space-between;
    z-index: 1000;
    box-shadow: 0 2px 5px rgba(0,0,0,0.1);
}

main {
    flex: 1;
    margin-top: 70px;
    padding: 20px;
    display: grid;
    grid-template-columns: repeat(auto-fit,minmax(220px,1fr));
    gap: 20px;
}

#products .product {
    border: 1px solid #ddd;
    border-radius: 8px;
    padding: 15px;
    text-align: center;
    transition: 0.3s;
    background: #fff;
}

#products .product:hover {
    transform: scale(1.05);
    box-shadow: 0 5px 15px rgba(0,0,0,0.1);
}

#products img {
    width: 100%;
    height: 150px;
    object-fit: cover;
    border-radius: 5px;
}

#cart-sidebar {
    width: 300px;
    padding: 20px;
    border-left: 1px solid #ccc;
    background: #f8f8f8;
    position: fixed;
    right: 0;
    top: 70px;
    height: calc(100% - 70px);
    overflow-y: auto;
    box-shadow: -2px 0 5px rgba(0,0,0,0.05);
}

button {
    background: linear-gradient(90deg,#4facfe,#00f2fe);
    color: white;
    border: none;
    padding: 10px 15px;
    cursor: pointer;
    border-radius: 5px;
    margin-top: 10px;
}

button:hover {
    background: linear-gradient(90deg,#00f2fe,#4facfe);