html, body {
    width: 100vw;
    height: 100vh;
    padding: 0px;
    margin: 0px;
}

#center {
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;    
}

#center > div {
    position: relative;
    top: -200px;
    text-align: center;
    width: 90%;
}

#chart {
    width: 100%;
    margin: 20px auto;
    background: #f9f9f9; /* Lichte achtergrond */
    border-radius: 8px;
    padding: 10px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1); /* Subtiele schaduw */
}