html, body {
    margin: 0;
    padding: 0;
    overflow: hidden; /* Prevents scrolling */
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh; /* Full viewport height */
    background: #fffff;
}

.chart-container {
    width: 100%;
    height: 100%;
    max-width: 600px; /* Same as iframe width */
    max-height: 400px; /* Same as iframe height */
    padding: 0;
    box-sizing: border-box;
}