img {
  display: block;
  margin-left: auto;
  margin-right: auto;
  max-width: 100%;
  max-height: 100%;
}

body {
  max-width: 800px;
  margin-left: auto;
  margin-right: auto;
  color: #464646;
}

h1 {
  color: #29567b; 
}
h2 {
  border-bottom: gray solid 1px;
  padding-bottom: 0.3em;
}
h1 {
  padding-bottom: 0;
}
p {
  // font-size: smaller;
}
table {
  // font-size: smaller;
}

ul {
  // font-size: smaller;
}

table thead tr th {
  background-color: #90b0bf;
}

table code {
  background: none;
  padding: 0;
  font-weight: bold;
  color: #537ea4;
}

summary {
  cursor: pointer;
}

video {
  padding-bottom: 25px;
}