h1, h2, h3, h4, h5, h6 {
    text-align: center;
    color: #222;
    line-height: 90%;
}

body {
    color: #444;
    background-color: #EEEEEE;
}

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

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

#boston-example td, th {
    padding-left: 1em !important;
    padding-right: 1em !important;
}

.hidden {
    display: none;
}

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

#overview { display: none; }
.impress-on-overview .step {
    opacity: 1;
    cursor: pointer;
}