* {
  box-sizing: border-box;
}
html {
  padding: 0;
}
body {
  background: #00aeeb;
  color: #103140;
  font-family: Helvetica, Verdana, Arial, sans-serif;
  height: 100%;
  margin: 0;
}
h1 {
  font-size: 3em;
  margin: 0;
}
em {
  color: #00aeeb;
  font-style: normal;
}
dt {
  font-weight: bold;
}
dd {
  margin-bottom: 1em;
  margin-left: 0;
}
main {
  background: #fff;
  padding: 1em;
  margin: 1em auto;
  transition: width 0.2s;
  width: 40vw;
}
header {
  border-bottom: 2px solid #00aeeb;
}
.odd {
  background: rgba(0, 174, 275, 0.05);
}
@media screen and (max-width: 1000px) {
  main {
    width: 70vw;
  }
}
@media screen and (max-width: 700px) {
  main {
    width: 80vw;
  }
}
@media screen and (max-width: 400px) {
  main {
    margin: 5px auto;
    width: 100vw;
  }
}