body {
    font-family: Verdana;
    background: #f8f9fa;
    padding: 20px;
    text-align: center;
}

header {
    background: #004d40;
    color: white;
    padding: 15px;
}

form {
    background: white;
    padding: 20px;
    margin: 20px auto;
    border-radius: 8px;
    box-shadow: 0 0 5px gray;
    max-width: 400px;
}

input, button {
    display: block;
    width: 80%;
    margin: 10px auto;
    padding: 10px;
}

button {
    background: #00796b;
    color: white;
    border: none;
    cursor: pointer;
}

button:hover {
    background: #009688;
}