* {
    font-family:
        -apple-system,
        BlinkMacSystemFont,
        "Segoe UI",
        Roboto,
        Helvetica,
        Arial,
        "Apple Color Emoji",
        "Segoe UI Emoji",
        "Segoe UI Symbol",
        sans-serif;
}

.container {
    height: 350px;
    width: 500px;
    margin: 0 auto;
}

/* Add arrows to lines (using SVG markers) */
.highcharts-name-line1,
.highcharts-arrows {
    marker-end: url(#head);
    marker-start: url(#tail);
}

.highcharts-name-line2 {
    marker-start: url(#tail);
}
