body {
    font-family: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
    padding: 24px;
}

form {
    max-width: 560px;
    margin: 0 auto;
}

label {
    display: block;
    margin-top: 12px;
}

input,
textarea {
    width: 100%;
    padding: 8px;
    margin-top: 4px;
    box-sizing: border-box;
}

.error {
    color: #b00020;
    font-size: 0.9em;
}

.success {
    color: #0a0;
}

button {
    margin-top: 12px;
    padding: 10px 16px;
}