body {
  margin: 0;
  font-family: Roboto, -apple-system, BlinkMacSystemFont, Segoe UI, Oxygen,
    Ubuntu, Cantarell, Fira Sans, Droid Sans, Helvetica Neue, sans-serif;
  line-height: 1.5;
  padding-bottom: 2.5rem;
  color: #333;
  background-color: #f0f7f7;
}

h1,
h2,
h3,
h4,
h5,
h6 {
  margin: 0 0 0.5em 0;
  font-weight: 400;
  line-height: 1.2;
}

h1 {
  font-size: 2em;
}

a {
  color: inherit;
}

code {
  font-family: menlo, inconsolata, monospace;
  font-size: calc(1em - 2px);
  color: #555;
  background-color: #f0f0f0;
  padding: 0.2em 0.4em;
  border-radius: 2px;
}

@media (min-width: 400px) {
  body {
    font-size: 16px;
  }
}

.container {
  max-width: 800px;
  margin: 0 auto;
}

article {
  background-color: #fff;
  border: 1px solid rgba(0, 0, 0, 0.1);
  padding: 1rem 1.25rem;
  border-radius: 0.2rem;
}
article + article {
  margin-top: 0.5rem;
}
article + h3 {
  margin-top: 1rem;
}
h3 {
  opacity: 0.75;
}
h4 {
  font-weight: bold;
}
article.down {
  border-left: 0.2rem solid #e74c3c;
}
article.up {
  border-left: 0.2rem solid #2ecc71;
}

.f {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
}

section + h2 {
  margin-top: 2rem;
}