main.css

body {
  height: 100%;
  margin: 0;
  font-family: Georgia,Cambria,"Times New Roman",Times,serif;
  letter-spacing: 0.01rem;
  font-weight: 400;
  font-style: normal;
  font-size: 22px;
  line-height: 1.5;
  color: rgba(0,0,0,0.8);
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

h1, h2, h3, h4, h5 {
  font-family: "Lucida Grande","Lucida Sans Unicode","Lucida Sans",Geneva,Verdana,sans-serif;
  letter-spacing: -0.02em;
}

header h1 {
  font-weight: 400;
  font-style: normal;
  font-size: 28px;
  margin-left: -1.8px;
  line-height: 1.2;
  margin-bottom: 4px;
}

article h1 {
  font-weight: 700;
  font-style: normal;
  font-size: 36px;
  margin-left: -1.8px;
  line-height: 1.2;
  margin-top: 40px;
  margin-bottom: 4px;
}

h2 {
  font-weight: 700;
  font-style: normal;
  font-size: 30px;
  margin-left: -1.5px;
  line-height: 1.2;
  margin-top: 40px;
  margin-bottom: 2px;
}

h3 {
  margin-bottom: 10px;
}

a {
  color: rgba(70,130,180,1);
  text-decoration: none;
}

header h1 a {
  color: rgba(0,0,0,0.8);
  text-decoration: none;
}

header, article {
  width: 700px;
  position: relative;
  right: 0%;
  margin: 0 auto;
  word-wrap: break-word;
  margin-bottom: 30px;
}

@media (max-width: 800px) {
  header, article {
    width: 640px;
  }
}

@media (max-width: 680px) {
  header, article {
    width: auto;
    margin-left: 20px;
    margin-right: 25px;
  }
}

hr {
  border: 0;
  background: #666;
  height: 1px;
}

/* SVG styles for responsive resizing. */
div.svg {
    position: relative;
    height:0;
    /* padding-top: ???; */
}

svg {
    position: absolute;
    display:block;
    width: 100%;
    height: 100%;
    top:0;
    left:0;
    /* background-color: cyan; */
}