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

header {
    background-color: #333;
    color: white;
    padding: 10px 0;
}

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

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

nav ul li a {
    color: white;
    text-decoration: none;
    padding: 10px;
}

nav ul li a.active {
    background-color: #555;
}

main{
    background: url('background.jpg') no-repeat center center/cover;
    height: 100vh;
}

section {
    display: none;
    padding: 20px;
}

section.active {
    display: block;
}

footer {
    background-color: #333;
    color: white;
    text-align: center;
    padding: 10px 0;
    position: fixed;
    width: 100%;
    bottom: 0;
}

form {
    display: flex;
    flex-direction: column;
}

form label {
    margin: 20px 0 5px;
}

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

form button {
    padding: 10px;
    border: none;
    border-radius: 5px;
    background-color: #333;
    color: white;
    cursor: pointer;
    margin-top: 10px;
    font-size: smaller;
}

span.alert{
    color:red;
    font-weight: bold;
    margin-bottom: 10px;
}