:root {
  --font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial,
    sans-serif, "Apple Color Emoji", "Segoe UI Emoji";
  --font-size: 18px;
  --font-weight: 400;
  --font-weight-bold: 700;
  --header-line-height: 1.4em;

  --text-color: rgb(63, 63, 63);
  --text-color-light: rgb(110, 110, 110);
  --link-color: rgb(1, 87, 155);
  --background-color: #fff;
  --pre-background: #f0f5f9;
  --border-color: rgb(224, 224, 224);

  --vertical-margin: 1em;
  --side-margin: 2em;
  --max-width: 40em;

  --nav-animation-base: 2000ms;
  --nav-animation-delta: 500ms;
}

/* Base */

html,
body {
  width: 100%;
  height: 100%;
}

body {
  margin: 0;
  background: var(--background-color);

  font-family: var(--font-family);
  font-size: var(--font-size);
  font-weight: var(--font-weight);
  color: var(--text-color);
  -webkit-font-smoothing: antialiased;
}

h1,
h2,
h3 {
  font-weight: var(--font-weight);
}

a {
  position: relative;
  text-decoration: none;
  transition: all 250ms ease;
}

a,
a:visited,
a:hover,
a:active {
  color: var(--link-color);
}

a:hover,
a:active {
  text-decoration: underline;
}

p,
small {
  max-width: var(--max-width);
}

p,
li {
  line-height: 1.6em;
}

small {
  font-size: 0.7em;
}

pre {
  padding: 0.5em 1em;
  background: var(--pre-background);
  font-size: 16px;
}

blockquote {
  margin: 0;
  padding: calc(var(--vertical-margin)/4) var(--side-margin);
  border-left: calc(var(--side-margin)/4) solid var(--pre-background);
}

table {
  width: 100%;
  max-width: var(--max-width);
  margin: var(--vertical-margin) 0;
  border-collapse: collapse;
  font-size: 0.9em;
}

th,
td {
  padding: 0.4em 0.8em;
  border-bottom: 1px solid var(--border-color);
  line-height: 1.6em;
  text-align: left;
  vertical-align: top;
}

th {
  font-weight: var(--font-weight-bold);
}

thead th {
  border-bottom: 2px solid var(--border-color);
}

.hidden {
  display: none !important;
  visibility: hidden;
}

/* Animation */

@keyframes fadeIn {
  from {
    opacity: 0;
  }
  to {
    opacity: 1;
  }
}

/* Main site elements */

.site-header {
  width: 100%;
  margin: 1em auto;
  overflow: hidden;

  line-height: var(--header-line-height);
}

.site-home-link:hover {
  text-decoration: none;
}

.site-title {
  max-width: 110px;
  padding: 0.4em 0.7em;
  margin: 1em auto;
  border: 3px solid var(--text-color);
  color: var(--text-color);
  font-size: 1.1em;
  font-weight: var(--font-weight-bold);
  text-align: center;
  white-space: nowrap;
}

.site-nav {
  display: flex;
  justify-content: center;
  align-items: center;
  flex-wrap: wrap;
  gap: 1rem;
  margin: 0 auto 0.5rem;
  padding: 0;

  font-size: calc(var(--font-size) * 0.9);
  font-weight: var(--font-weight-bold);
  list-style: none;
  text-align: center;
}

.site-nav li {
  padding: 0;
  transition: all 200ms ease-in-out;

  /* Staggered fade in, cycling every 6 items */
  animation: fadeIn
    calc(var(--nav-animation-base) + var(--nav-item) * var(--nav-animation-delta));
}

.site-nav li:nth-of-type(6n + 1) { --nav-item: 1; }
.site-nav li:nth-of-type(6n + 2) { --nav-item: 2; }
.site-nav li:nth-of-type(6n + 3) { --nav-item: 3; }
.site-nav li:nth-of-type(6n + 4) { --nav-item: 4; }
.site-nav li:nth-of-type(6n + 5) { --nav-item: 5; }
.site-nav li:nth-of-type(6n + 6) { --nav-item: 6; }

.site-nav-container {
  margin: 2rem var(--side-margin);
}

.site-content {
  width: 90%;
  max-width: var(--max-width);
  margin: 0 auto;
  font-size: 18px;
  animation: fadeIn 2s;
}

.site-content img {
  max-width: 100%;
}

.post {
  margin: 3rem 0;
}

.post-header {
  margin: 1rem 0;
}

.post-title {
  margin: 0;
  line-height: 150%;
}

.post-date,
.post-canonical {
  margin: 0.5rem 0;
  font-size: 0.9rem;
  color: var(--text-color-light);
}

.post-body img,
.post-body video {
  display: block;
  max-width: 100%;
  margin: 1em auto;
}

.img-med {
  width: 440px;
}

.video,
.slides {
  position: relative;
  height: 0;
}

.video {
  padding-bottom: 56.25%; /* 16:9 */
}

.slides {
  padding-bottom: 62.5%;
}

.video iframe,
.slides iframe {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
}

@media (max-width: 440px) {
  .site-content {
    font-size: 16px;
  }

  .post-title {
    font-size: 1.8em;
  }
}