#hbm-new-subscription-form {
    max-width: 600px;
    margin: 30px auto;
    background: #fff;
    padding: 20px;
    border: 1px solid #ddd;
    border-radius: 8px;
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.1);
}

#hbm-new-subscription-form label {
    display: block;
    margin-bottom: 5px;
    font-weight: 500;
}

#hbm-new-subscription-form input[type="text"],
#hbm-new-subscription-form input[type="number"],
#hbm-new-subscription-form input[type="datetime-local"],
#hbm-new-subscription-form select {
    width: 100%;
    padding: 10px;
    margin-bottom: 15px;
    border: 1px solid #ccc;
    border-radius: 6px;
    font-size: 14px;
    box-sizing: border-box;
}

#hbm-new-subscription-form input[readonly] {
    background-color: #f9f9f9;
    cursor: not-allowed;
}

#hbm-new-subscription-form button[type="submit"] {
    width: 100%;
    padding: 12px;
    background-color: #229196;
    color: white;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    font-size: 16px;
    font-weight: bold;
}

#hbm-new-subscription-form button[type="submit"]:hover {
    background-color: #243945;
}

.success-message,
.error-message {
    padding: 12px;
    font-weight: bold;
    text-align: center;
    border-radius: 6px;
    margin-bottom: 15px;
}

.success-message {
    background-color: #4CAF50;
    color: white;
}

.error-message {
    background-color: #f44336;
    color: white;
}