:root {
    --dark-bg: #1e1e1e;
    --text-light: #cccccc;
}

html, body {
    margin: 0;
    width: 100%;
    height: 100%;
    overflow: hidden;
    background: var(--dark-bg);
}

body {
    display: flex;
    justify-content: center;
    align-items: stretch;
    color: var(--text-light);
}

iframe {
    display: block;
    width: 100%;
    height: 100%;
    max-width: 680px;
    border: none;
    margin: 0;
}