body,
html,
div {
    padding: 0;
    margin: 0;
    font-family: "Helvetica", sans-serif;
}

.container {
    margin-left: auto;
    margin-right: auto;
}

.k-row {
    margin-left: auto;
    margin-right: auto;
    max-width: 1600px;
}

.demo {
    background-color: var(--main-bg-color);
    color: var(--code-text-color);
}