body {
    background: #e4e4e4;
    font-family: Arial, Helvetica, sans-serif;
    margin: 0;
}

.rdb-register-maincard {
    width: 80%;
    background: white;
    border-radius: 10px;
    box-shadow: 5px 5px 15px #c0c0c0;
    margin: 50px auto auto;
    text-align: center;
    padding: 2% 2% 6%;

    display: flex;
    flex-direction: column;
    align-items: center; /* Zentriert Kinder horizontal */
    justify-content: center; /* Optional: Zentriert Kinder vertikal */
}

.rdb-register-form {
    display: flex;
    flex-direction: column;
    width: 90%;
}

.rdb-register-form label {
    margin-top: 10px;
    margin-bottom: 10px;
}

.rdb-register-form input {
    border-radius: 0;
    height: 30px;
    border: 2px solid #4d8ba3;
}

.rdb-register-form select {
    border-radius: 0;
    height: 30px;
    border: 2px solid #4d8ba3;
}

.rdb-register-form button {
    margin-top: 30px;
    margin-bottom: 30px;
    border-radius: 0;
    height: 35px;
    border: 2px solid #4d8ba3;
    background: #85bfab;
}

.rdb-register-form-error {
    margin-top: 30px;
    font-size: small;
    color: #b20000;
    background: #fd9696;
    border: 2px solid #b20000;
    padding: 1%;
    justify-content: center;
    align-items: center;
    display: none;
}