#container-woordjes { 
    background: white; 
    padding: 20px; 
    border-radius: 8px; 
    box-shadow: 0 4px 8px rgba(0,0,0,0.1); 
    text-align: center;
    flex-direction: column;
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%,-50%);
    width: 45%;
    height: 35%;
}