.box {
    border-radius: 20px/50px;
    background-clip: padding-box;
    text-align: center;
}

.menu-button {
    color: #fff;
    text-decoration: none;
    cursor: pointer;
    font-size: 50px;
    margin-right: 10px;

}

.menu-links {
        background-color: rgb(100, 100, 100);
        color: white;
        text-decoration: none;
        padding: 10px;
        display: inline-block;  
        text-align: center;
        border-radius: 10px;
        margin: 10px;
}

.overlay {
    position: fixed;
    top: 0;
    bottom: 0;
    left: 0;
    right: 0;
    background: rgb(0, 0, 0, 0.7);
    transition: opacity 500ms;
    visibility: hidden;
    opacity: 0;
}
.overlay:target {
    visibility: visible;
    opacity: 1;
}

.popup {
    margin: 70px auto;
    padding: 20px;
    background: rgb(55, 55, 55);
    border-radius: 5px;
    width: 80%;
    position: relative;
    color: white;
}

.popup h2 {
    margin-top: 0;
    font-family: Tahoma, Arial, sans-serif;
}
.popup .close {
    position: absolute;
    top: 20px;
    right: 30px;
    transition: all 200ms;
    font-size: 40px;
    font-weight: bold;
    text-decoration: none;
    color: grey;
}
.popup .close:hover {
    color: #ff0000;
}
.popup .content {
    max-height: 30%;
    overflow: auto;
}

@media screen and (max-width: 700px){
    .box{
        width: auto;
        text-align: right;
    }

    .popup{
        width: 70%;
    }
}

/*
Popup / Modal (Pure CSS, ohne JavaScript)
Original Code by Prakash (@imprakash)
Source: https://codepen.io/imprakash/pen/GgNMXO
License: MIT License
Modified and adapted for this project
*/