/* ---------------------------------------------------------------------------
   Resets and element defaults.
   --------------------------------------------------------------------------- */

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

body {
  margin: 0;
  background: var(--c-bg);
  color: var(--c-text);
  font-family: var(--font-sans);
  font-size: var(--fs-base);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

h1,
h2,
h3,
h4 {
  line-height: 1.25;
  margin: 0 0 var(--s-4);
  font-weight: 600;
}

h1 {
  font-size: var(--fs-3xl);
}
h2 {
  font-size: var(--fs-2xl);
  margin-top: var(--s-7);
}
h3 {
  font-size: var(--fs-xl);
  margin-top: var(--s-6);
}

p {
  margin: 0 0 var(--s-4);
}

a {
  color: var(--c-link);
  text-decoration: none;
}

a:hover,
a:focus-visible {
  color: var(--c-link-hover);
  text-decoration: underline;
}

/* A visible focus ring is not optional. Someone navigating by keyboard has to
   be able to see where they are. */
:focus-visible {
  outline: 2px solid var(--c-link);
  outline-offset: 2px;
  border-radius: 2px;
}

ul,
ol {
  margin: 0 0 var(--s-4);
  padding-left: var(--s-5);
}

li {
  margin-bottom: var(--s-2);
}

code {
  font-family: var(--font-mono);
  font-size: 0.9em;
  background: var(--c-code-bg);
  color: var(--c-code-text);
  padding: 0.15em 0.4em;
  border-radius: var(--radius);
  border: 1px solid var(--c-border);
}

pre {
  background: var(--c-code-bg);
  border: 1px solid var(--c-border);
  border-radius: var(--radius);
  padding: var(--s-4);
  overflow-x: auto;
  margin: 0 0 var(--s-4);
}

pre code {
  background: none;
  border: none;
  padding: 0;
  font-size: var(--fs-sm);
  line-height: 1.5;
}

img {
  max-width: 100%;
  height: auto;
}

table {
  width: 100%;
  border-collapse: collapse;
  margin: 0 0 var(--s-5);
  font-size: var(--fs-sm);
}

th,
td {
  text-align: left;
  padding: var(--s-2) var(--s-3);
  border-bottom: 1px solid var(--c-border);
}

th {
  font-weight: 600;
  background: var(--c-surface);
}

hr {
  border: none;
  border-top: 1px solid var(--c-border);
  margin: var(--s-6) 0;
}

blockquote {
  margin: 0 0 var(--s-4);
  padding: var(--s-3) var(--s-4);
  border-left: 4px solid var(--c-accent);
  background: var(--c-surface);
  color: var(--c-text-muted);
}

blockquote p:last-child {
  margin-bottom: 0;
}

/* Visible only to screen readers. */
.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* Keyboard users land here first and can jump past the navigation. */
.skip-link {
  position: absolute;
  top: -100px;
  left: var(--s-4);
  z-index: 100;
  background: var(--c-accent);
  color: #1f2328;
  padding: var(--s-3) var(--s-4);
  border-radius: var(--radius);
  font-weight: 600;
  transition: top var(--transition);
}

.skip-link:focus {
  top: var(--s-4);
}