.event-invitation-form {
    max-width: 600px;
    margin: 0 auto;
    padding: 20px;
    box-sizing: border-box;
    border: 4px solid #4285f4;
    background-color: #f0f0f0;
    border-radius: 8px;
}

.event-invitation-form .form-group {
    margin-bottom: 15px;
}

.event-invitation-form label {
    display: block;
    margin-bottom: 5px;
    font-weight: bold;
}

/* label inline voor checkboxes en radio buttons*/
.event-invitation-form .checkbox-container label,
.event-invitation-form .radio-container label{
     display: inline;
     margin-left: 5px;
}

.event-invitation-form .checkbox-container,
.event-invitation-form .radio-container{
  display: inline-block;
  margin-right: 10px;
}

.event-invitation-form input[type="text"],
.event-invitation-form input[type="email"],
.event-invitation-form textarea {
    width: 100%;
    padding: 10px;
    border: 1px solid #ccc;
    border-radius: 4px;
    box-sizing: border-box;
    margin-bottom: 5px;
}

.event-invitation-form textarea {
    min-height: 100px;
}

.event-invitation-form button[type="submit"] {
    background-color: #4285f4;
    color: white;
    padding: 10px 15px;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    display: block;
    width: 100%;
}

.event-invitation-form button[type="submit"]:hover {
    background-color: #357ae8;
}

.event-invitation-message {
    padding: 10px;
    margin-bottom: 15px;
    border-radius: 4px;
}

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

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