* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: Arial, sans-serif;
    line-height: 1.6;
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

header {
    background: #333;
    color: #fff;
    padding: 1rem;
}

header nav a {
    color: #fff;
    text-decoration: none;
    font-size: 1.2rem;
    font-weight: bold;
    margin-right: 1.5rem;
}

main {
    flex: 1;
    padding: 2rem;
}

form {
    max-width: 500px;
    display: flex;
    flex-direction: column;
    gap: 1rem;
    margin-top: 1rem;
}

form label {
    font-weight: bold;
}

form textarea,
form select {
    padding: 0.5rem;
    font-size: 1rem;
    border: 1px solid #ccc;
    border-radius: 4px;
}

form button {
    padding: 0.75rem;
    font-size: 1rem;
    background: #333;
    color: #fff;
    border: none;
    border-radius: 4px;
    cursor: pointer;
}

form button:hover {
    background: #555;
}

.message {
    margin-top: 1rem;
    padding: 0.75rem;
    background: #e8f5e9;
    border: 1px solid #a5d6a7;
    border-radius: 4px;
}

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