body {
    margin: 0;
    font-family: Arial;
}

header {
    background: #222;
    color: white;
    padding: 15px;
    text-align: center;
}

nav a {
    margin: 10px;
    color: white;
    text-decoration: none;
}

nav a:hover {
    color: yellow;
}

main {
    padding: 20px;
}

.card {
    padding: 20px;
    border: 1px solid #ccc;
    margin: 10px auto;
    max-width: 500px;
}

input, textarea {
    width: 100%;
    padding: 10px;
    margin: 5px 0;
}
footer{
    text-align: center;
}

button {
    padding: 10px;
    background: black;
    color: white;
    border: none;
    cursor: pointer;
}