body {
    font-family: Arial, sans-serif;
    margin: 0;
    padding: 0;
    background-color: #f4f4f4;
    color: #333;
}

header {
    background-color: #333;
    color: #fff;
    text-align: center;
    padding: 1em 0;
    position: relative;
}

header .logo {
    position: absolute;
    top: 10px;
    left: 20px;
}

header .logo img {
    max-height: 50px;
}

header h1 {
    margin: 0;
    font-size: 2em;
}

header p {
    margin: 0.5em 0 0;
    font-size: 1em;
}

nav ul {
    list-style-type: none;
    padding: 0;
    background-color: #444;
    text-align: center;
}

nav ul li {
    display: inline;
    margin: 0;
}

nav ul li a {
    color: #fff;
    padding: 14px 20px;
    text-decoration: none;
    display: inline-block;
}

nav ul li a:hover {
    background-color: #575757;
}

main {
    padding: 2em;
}

h2 {
    text-align: center;
}

ul {
    list-style-type: none;
    padding: 0;
}

li {
    background: white;
    margin: 10px 0;
    padding: 10px;
    border-radius: 5px;
    box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
    display: flex;
    align-items: center;
}

li img {
    max-width: 100px;
    max-height: 100px;
    margin-right: 10px;
}

li a {
    text-decoration: none;
    color: #1a73e8;
    flex-grow: 1;
}

li a:hover {
    text-decoration: underline;
}

#product-details {
    background: white;
    margin: 20px auto;
    padding: 20px;
    border-radius: 5px;
    box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
    max-width: 600px;
    text-align: center;
}

#product-details img {
    max-width: 100%;
    height: auto;
    border-radius: 5px;
}

footer {
    text-align: center;
    padding: 1em 0;
    background-color: #333;
    color: #fff;
    position: fixed;
    width: 100%;
    bottom: 0;
}