blog/static/css/common.css

html {
  height: 100%;
  font-size: 20px;
  font-family: BlinkMacSystemFont, -apple-system, Segoe UI, Roboto, Oxygen, Ubuntu, Cantarell, Fira Sans, Droid Sans, Helvetica Neue, Helvetica, Arial, sans-serif;
  font-weight: 400;
  text-rendering: optimizeLegibility;
}

body {
  margin: 0;
  width: 100%;
  height: 100%;
}

a, a:visited {
  color: #555;
  border-bottom: 1px dashed #999;
  text-decoration: none;
}

header {
  display: flex;
  align-items: center;
  height: 8%;
  padding: 0 .5em;
  box-shadow: 1px 3px 3px 0 #bbb;
}

header a {
  display: flex;
  align-items: center;
  border-bottom: none;
}

header .left,
header .left a,
header .right {
  display: inline-flex;
  align-items: center;
  width: 50%;
}

header .right {
  display: inline-flex;
  justify-content: right;
  text-align: right;
  opacity: .8;
}

header .icon {
  background-size: 40px !important;
  width: 40px;
  height: 40px;
  display: inline-flex;
}

header .left .icon {
  background: url(/img/icon.png);
  margin-right: 1em;
}

header .right .icon {
  background: url(/img/rss.png);
}

header .title {
  display: inline-flex;
}

main {
  height: 92%;
  overflow: auto;
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 0 2em;
}

h1 {
  font-size: 2em;
  line-height: 1.2em;
}

h2 {
  font-size: 1.5em;
  line-height: 1.1em;
}

@media screen and (min-width: 768px) {
  header {
    height: 6%;
  }

  main {
    height: 94%;
  }
}