* {
    padding: 0;
    margin: 0;
    box-sizing: border-box;
}

body {
    background: linear-gradient(45deg, black 49%, darkred 90%, red 99.9%, white);
    height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    text-align: center;
    font-family: Verdana, Geneva, Tahoma, sans-serif;
    color: beige;
}

#fehler-fenster {
    display: none;
    opacity: 0;
    transition: opacity 0.3s ease-in-out;
}


.register-container,
.error-container {
    background: linear-gradient(130deg, red, black, red);
    border: solid 1px beige;
    border-radius: 15px;
    width: 70%;
    padding: 20px;
    margin: 10px;
}

.error-container {
    text-align: center;
    margin: 10% auto;
}

.error-message {
    background: linear-gradient(130deg, red, black, red);
    color: beige;
    padding: 10px;
    margin-bottom: 10px;
}

.form-group {
    margin-bottom: 20px;
}

label {
    color: beige;
    display: block;
    margin-bottom: 5px;
}

input[type="text"],
input[type="password"],
input[type="email"] {
    width: calc(100% - 22px);
    height: 40px;
    border: solid 1px black;
    padding: 10px;
    font-size: 16px;
    margin-bottom: 10px;
}

button {
    width: 100px;
    height: 40px;
    background-color: #4CAF50;
    color: white;
    border: none;
    border-radius: 5px;
    cursor: pointer;
}

button:hover {
    background-color: #45a049;
}