:root {
  color-scheme: dark;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  overflow-x: clip;
  font-family: "JetBrains Mono", "SFMono-Regular", Consolas, monospace;
  -webkit-font-smoothing: antialiased;
}

a { color: inherit; text-decoration: none; }
button { font: inherit; }
svg { display: block; }

.skip {
  position: absolute;
  z-index: 999;
  top: -100px;
  left: 16px;
  padding: 10px 14px;
  background: #fff;
  color: #000;
}
.skip:focus { top: 16px; }

.concept-switcher {
  position: fixed;
  z-index: 50;
  right: 18px;
  bottom: 18px;
  display: flex;
  gap: 5px;
  padding: 5px;
  border: 1px solid rgba(255,255,255,.14);
  background: rgba(5,6,7,.86);
  box-shadow: 0 14px 50px rgba(0,0,0,.35);
  backdrop-filter: blur(14px);
}

.concept-switcher a {
  display: grid;
  width: 34px;
  height: 30px;
  place-items: center;
  color: rgba(255,255,255,.55);
  font-size: 10px;
}

.concept-switcher a:hover,
.concept-switcher a[aria-current="page"] {
  color: #0a0a0a;
  background: #f7f4e9;
}

@media (max-width: 680px) {
  .concept-switcher { right: 10px; bottom: 10px; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: .01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .01ms !important;
  }
}