body {
    font-family: Arial, sans-serif;
    background: #111;
    color: #eee;
    margin: 0;
    padding: 0;
}
header {
    background: #222;
    padding: 20px;
    text-align: center;
}
nav {
    display: flex;
    justify-content: center;
    background: #333;
    flex-wrap: wrap;
}
nav a {
    color: #fff;
    padding: 14px 20px;
    text-decoration: none;
}
section {
    padding: 20px;
    text-align: center;
}
.gallery-img {
    width: 90%;
    max-width: 300px;
    margin: 10px auto;
    display: block;
}
form {
    margin-top: 10px;
}
input, textarea {
    width: 80%;
    margin: 5px 0;
    padding: 10px;
}
button {
    padding: 10px 20px;
    background: #555;
    color: #fff;
    border: none;
}
footer {
    text-align: center;
    padding: 20px;
    background: #222;
}