.newsletter-message {
    margin-top: 10px;
    padding: 12px 16px;
    border-radius: 6px;
    font-size: 14px;
    font-weight: 500;
    transition: all 0.3s ease;
}

.newsletter-message.success {
    background-color: #d4edda;
    color: #155724;
    border: 1px solid #c3e6cb;
}

.newsletter-message.error {
    background-color: #f8d7da;
    color: #721c24;
    border: 1px solid #f5c6cb;
}

/* Loading state for submit button */
button[type="submit"]:disabled {
    opacity: 0.7;
    cursor: not-allowed;
}

/* Responsive adjustments */
@media (max-width: 768px) {
    .newsletter-message {
        font-size: 13px;
        padding: 10px 14px;
    }
}