:root {
  font: 16px sans-serif;
  /* colours */
  --blackish: #181414;
  --darkgrey: #302828;
  --lightgrey: #a89984;
  --whiteish: #f3f1d3;
  --darkred: #cc241d;
  --lightred: #fb4934;
  --darkgreen: #98971a;
  --lightgreen: #b8bb26;
  --darkyellow: #d79921;
  --lightyellow: #fabd2f;
  --darkblue: #458588;
  --lightblue: #83a598;
  --darkmagenta: #783b59;
  --lightmagenta: #d3869b;
  --darkcyan: #689d6a;
  --lightcyan: #8ec07c;
  --fullwidth: 95vw;
}

@media (prefers-color-scheme: light) {
  :root {
    --highlight: var(--darkmagenta);
    --lowlight: var(--lightmagenta);
    --visited: var(--darkblue);
    --bg: var(--whiteish);
    --fg: var(--blackish);
    background-color: var(--bg);
    color: var(--fg);
  }
}

@media (prefers-color-scheme: dark) {
  :root {
    --highlight: var(--lightyellow);
    --lowlight: var(--darkyellow);
    --visited: var(--darkred);
    --bg: var(--blackish);
    --fg: var(--whiteish);
    background-color: var(--bg);
    color: var(--fg);
  }
}

@media (min-width: 576px) {
  :root {
    --fullwidth: 35rem;
  }
}

header {
  display: flex;
  flex-flow: row-reverse;
}

body {
  display: flex;
  flex-flow: column;
  margin: 0 auto 0 auto;
  height: 100vh;
  width: var(--fullwidth);
  line-height: 1.5rem;
}

main {
  padding-bottom: 10rem;
}

header,
footer {
  flex-shrink: 0;
  width: var(--fullwidth);
  color: var(--fg);
}

ul {
  padding-left: 0;
  list-style-type: circle;
}

header ul {
  list-style-type: none;
}

nav {
  display: flex;
  flex-flow: column;
  justify-content: space-between;
}

nav ul li {
  display: inline-flex;
  padding-right: 1em;
}

main {
  flex-basis: 100%;
  flex-grow: 1;
  display: flex;
  flex-direction: column;
  justify-content: flex-start;
}

/* text styles */

h1,
h2,
h3,
h4,
h5,
h6 {
  margin: 2rem 0 2rem 0;
}
h1 {
  font-size: 1.5em;
}
h1,
h2,
nav h3 {
  border-bottom: dotted 1px;
}

nav h3 {
  padding-bottom: 0;
}

p {
  margin: 0 0 2rem 0;
}

a {
  text-decoration: underline;
  color: var(--fg);
}
a:hover {
  color: var(--highlight);
}

header a {
  color: var(--highlight);
}

footer {
  padding: 3rem 0 3rem 0;
}