@font-face {
  font-family: "Fira mono";
  src: url(../fonts/fira-mono/FiraMono-Regular.ttf) format(truetype);
  font-weight: 400;
  font-style: normal;
}

@font-face {
  font-family: "Fira mono";
  src: url(../fonts/fira-mono/FiraMono-Medium.ttf) format(truetype);
  font-weight: 500;
  font-style: normal;
}

@font-face {
  font-family: "Fira mono";
  src: url(../fonts/fira-mono/FiraMono-Regular.ttf) format(truetype);
  font-weight: 600;
  font-style: bold;
}

:root {
  --line-height: 16pt;
  --font-size: 11pt;
}

html, body {
  font-family: "Fira mono";
  font-size: var(--font-size);
  line-height: var(--line-height);
}

body {
  display: grid;
  grid-template-columns: 1fr 1fr;
  grid-template-rows: 1fr;
  height: 100vh;
  box-sizing: border-box;
}

h1, h2 {
  display: block;
  letter-spacing: 0.25em;
  font-weight: 500;
}

h1 {
  margin-bottom: var(--line-height);
}

h2 {
  letter-spacing: .05em;
  text-decoration: underline;
  cursor: pointer;
}

p {
  max-width: 80ch;
  margin-bottom: var(--line-height);
}

main {
  grid-column: 1;
  padding: var(--line-height) calc(3 * var(--line-height)) var(--line-height) var(--line-height);
  overflow-y: auto;
}

aside {
  grid-column: 2;
  border-left: 1px solid black;
  overflow-y: auto;
}

summary {
  padding: calc(.5 * var(--line-height)) 0;
  list-style: none;
  border: none;
  outline: none;
}

.read-online-link {
  margin-left: calc(-1 * var(--line-height));
  margin-right: calc(-1 * var(--line-height));
  border-top: 1px solid black;
  border-bottom: 1px solid black;
  letter-spacing: .2em;
  padding: calc(.5 * var(--line-height)) var(--line-height);
}

details > summary::-webkit-details-marker {
  display: none;
}

details {
  border-bottom: 1px solid black;
  padding: calc(.5 * var(--line-height)) var(--line-height);
}

details + details {
  margin-top: -1px;
}

a {
  color: currentColor;
}

a:hover {
  text-decoration: none;
}

dl {
  margin: var(--line-height) 0;
  display: grid;
  grid-template-columns: 15ch 1fr;
  max-width: 80ch;
  font-size: 85%;
}