body {
    font-family: sans-serif;
    max-width: 700px;
    margin: 40px auto;
    padding: 0 20px;
}

h1 {
    text-align: center;
}

form {
    display: flex;
    gap: 10px;
    margin-bottom: 30px;
}

input {
    flex: 1;
    padding: 10px;
}

button {
    padding: 10px 20px;
}

.message {
    border: 1px solid #ccc;
    padding: 12px;
    margin-bottom: 10px;
    border-radius: 8px;
}