/* reset */
html, body, div, span, applet, object, iframe,
h1, h2, h3, h4, h5, h6, p, blockquote, pre,
a, abbr, acronym, address, big, cite, code,
del, dfn, em, img, ins, kbd, q, s, samp,
small, strike, strong, sub, sup, tt, var,
b, u, i, center,
dl, dt, dd, ol, ul, li,
fieldset, form, label, legend,
table, caption, tbody, tfoot, thead, tr, th, td,
article, aside, canvas, details, embed,
figure, figcaption, footer, header, hgroup,
menu, nav, output, ruby, section, summary,
time, mark, audio, video {
    margin: 0;
    padding: 0;
    border: 0;
    font-size: 100%;
    font: inherit;
    vertical-align: baseline;
}

h1, h2, h3, h4, h5, h6 {
    text-align: center;
}

.step {
    opacity: 0;
    transition: opacity 1s;
}
.step.active {
    opacity: 1;
}
.innerStep {
    position: absolute;
    opacity: 0;
    transition: opacity 0.5s;
}
.lastInnerstep {
    opacity: 1;
}

.center {
    position: absolute;
    left: 0;
    right: 0;
    margin: auto;
    text-align: center;
}
p.center {
    top: 50%;
    bottom: 50%;
}

.hidden {
    display: none;
}

.axis path, .axis line {
    fill: none;
    stroke: rgba(0, 0, 0, 0.87);
    stroke-width: 3;
}
.axis text {
    font-size: large;
}