* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  width: 100%;
  margin: auto;
  background-color: rgba(0, 0, 63, 1);
  color: #fff;
  padding: 15px;
}
header {
    padding: 15px;
}
.link {
  display: flex;
  justify-content: space-between;
}
a {
  text-decoration: none;
  color: #fff;
}
a:hover {
  color: rgba(255, 239, 213, 1);
}
h1 {
  font-size: 2rem;
  padding: 15px 0 0 15px;
}

h2 {
  font-size: 1.5rem;
  padding: 15px 0 0 15px;
}
h3,
h4 {
  font-size: 1.1rem;
  padding: 15px 0 0 15px;
}
em,
p {
  padding: 15px 0 0 15px;
}
pre {
  border-radius: 6px;
  width: 100%;
  padding: 15px 0 15px 15px;
  background-color: rgba(255, 239, 213, 1);
  color: #000;
  width: 80%;
  margin: 5px;
}
p {
  line-height: 25px;
}
em {
  line-height: 25px;
}

article {
  width: 100%;
  margin: auto;
  padding: 1.3rem;
}