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

header {
    background: #007bff;
    color: white;
    padding: 15px;
    text-align: center;
}

nav ul {
    list-style: none;
    padding: 0;
    display: flex;
    justify-content: center;
}

nav ul li {
    margin: 0 15px;
}

nav ul li a {
    color: white;
    text-decoration: none;
    font-weight: bold;
}

section {
    padding: 20px;
    text-align: center;
}

.category {
    background: white;
    padding: 15px;
    margin: 10px auto;
    width: 80%;
    box-shadow: 2px 2px 10px rgba(0, 0, 0, 0.1);
}

form {
    display: flex;
    flex-direction: column;
    width: 50%;
    margin: 0 auto;
}

form input, form textarea {
    margin-bottom: 10px;
    padding: 10px;
    border: 1px solid #ccc;
    border-radius: 5px;
}

button {
    background: #007bff;
    color: white;
    padding: 10px;
    border: none;
    cursor: pointer;
    border-radius: 5px;
}

footer {
    text-align: center;
    padding: 10px;
    background: #333;
    color: white;
    margin-top: 20px;
}