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

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

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

nav ul li {
    display: inline;
    margin: 0 10px;
}

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

section {
    padding: 2rem;
    margin: 1rem auto;
    max-width: 800px;
    background: #fff;
    border-radius: 5px;
}

footer {
    text-align: center;
    padding: 1rem 0;
    background: #333;
    color: #fff;
}

.upload-container {
    max-width: 400px;
    margin: 2rem auto;
    padding: 2rem;
    background: #fff;
    border-radius: 5px;
    text-align: center;
}

.upload-container input {
    width: 100%;
    padding: 0.5rem;
    margin: 0.5rem 0;
}

.upload-container button {
    padding: 0.5rem 1rem;
}

#error-message {
    color: red;
}

#image-gallery {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
}

.image {
    margin: 10px;
}

.image img {
    max-width: 200px;
    max-height: 200px;
    border-radius: 5px;
}