body {
    background-color: black;
    color: #d5d5d5;
    font-family: Arial, sans-serif;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
}

.myButton {
    box-shadow: inset 0px 1px 0px 0px #ffffff;
    background: linear-gradient(to bottom, #f9f9f9 5%, #d5d5d5 100%);
    background-color: #f9f9f9;
    border-radius: 28px;
    border: 1px solid #dcdcdc;
    display: inline-block;
    cursor: pointer;
    color: #666666;
    font-family: Arial, sans-serif;
    font-size: large;
    font-weight: bold;
    padding: 16px 31px;
    text-decoration: none;
    text-shadow: 0px 1px 0px #ffffff;
    margin-bottom: 16px;
}

.myButton:hover {
    background: linear-gradient(to bottom, #d5d5d5 5%, #f9f9f9 100%);
    background-color: #e9e9e9;
}

.myButton:active {
    position: relative;
    top: 1px;
}

h2 {
    padding: 0;
    margin: 0;
}

#chooseMode {
}

#ausgabe {
    opacity: 0;
    transition: opacity 500ms linear;
    white-space: pre-wrap;
    text-align: center;
}

#ausgabe.zeigen {
    opacity: 1;
    transition: opacity 500ms linear;
}

#gruppengroesse {
    width: 4em;
}

#gruppendiv {
    opacity: 0;
    transition: 500ms linear;
}