style.css

/** Styles for Demo Application */

body {
  font: 16px "Open Sans";
  color: #2c3e50;
}
a {
  text-decoration: none;
  color: #3498db;
}
.graph-container {
  display: table;
  margin-right: auto;
  margin-left: auto;
  font-size: 18px;
}
.text {
  width: 100%;
}
.text p {
  width: 75%;
  margin: auto;
  padding: 10px 0px;
  text-align: center;
}
code {
  width: 95%;
  margin: auto;
  text-align: center;
}
@media screen and (min-width: 800px) {
  code {
    width: 70%;
  }
}
.header {
  width: 100%;
  text-align: center;
  margin: 1% 0;
}
.header img {
  padding-top: 10px;
}
.header div {
  font-weight: 700;
  font-size: 1.6em;
  padding-top: 10px;
}
.dac-logo {
  display: none;
}
@media screen and (min-width: 800px) {
  .dac-logo {
    display: block;
    position: absolute;
    left: 5px;
    top: 5px;
  }
  .dac-logo img {
    width: 120px;
  }
}
.contact {
  width: 50%;
  margin: auto;
  text-align: center;
}
.footer {
  font-size: 0.9em;
  text-align: center;
  padding: 5px;
}
/** Styles for TIMESERIES */

.timeseries {
  width: 100%;
  padding: 2% 0;
}
.circ {
  fill: #d35400;
  opacity: 0.6;
  stroke: rgba(211, 84, 0, 0.7);
  stroke-width: 5px;
}
.domain {
  display: none;
}
.axis path,
.axis line {
  fill: none;
  stroke: #000;
  shape-rendering: crispEdges;
}
.axis text {
  font-size: 12px;
}
.tick line {
  stroke: #d5d5d5;
  opacity: 0.7;
}
.brush .extent {
  stroke: #fff;
  fill-opacity: 0.125;
  shape-rendering: crispEdges;
}
.clear-brush {
  display: none;
}
.brush-control {
  padding: 0.5%;
  width: 100%;
  text-align: center;
}
.brush-info {
  display: inline-block;
  font-size: 14px;
}
.subunit {
  fill: none;
  stroke: #fff;
  stroke-width: 1px;
}
text.subunit-label {
  font-family: "Helvetica Neue", Helvetica, Arial, sans-serif;
  font-size: 14px;
  font-weight: 300;
  text-anchor: middle;
  fill: #000;
}
.subunit-label {
  display: none;
}
.graticule {
  fill: none;
  stroke: #aaa;
  stroke-opacity: 0.5;
  stroke-width: 0.5px;
}
.banner {
  background-color: #f2f2f2;
  padding: 10px;
  text-align: center;
  font-size: 22px;
}

.button {
  background-color: #4caf50;
  border: none;
  color: white;
  padding: 10px 20px;
  text-align: center;
  text-decoration: none;
  display: inline-block;
  font-size: 18px;
  margin: 4px 12px;
  cursor: pointer;
}

.button-container {
  display: flex;
  justify-content: center;
}

button {
  padding: 10px;
  border: none;
  border-radius: 5px;
  margin: 10px;
  font-size: 14px;
  font-weight: bold;
  background-color: steelblue;
  color: white;
  cursor: pointer;
}

button:hover {
  background-color: burlywood;
}