html {
  color-scheme: dark;
  text-size-adjust: 100%;
  background-color: var(--color-bg);
}

body {
  min-block-size: 100dvh;
  color: var(--color-text);
  font-family: var(--font-sans);
  font-size: var(--font-size-body);
  font-weight: var(--font-weight-regular);
  line-height: var(--line-height-body);
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3, h4 {
  line-height: var(--line-height-heading);
  font-weight: var(--font-weight-thick);
  text-wrap: balance;
}

h1 { font-size: var(--font-size-heading-1); }
h2 { font-size: var(--font-size-heading-2); }
h3 { font-size: var(--font-size-heading-3); }

p {
  text-wrap: pretty;
  overflow-wrap: break-word;
}

a {
  color: var(--color-accent);
  text-decoration-thickness: var(--border-width);
  text-underline-offset: var(--focus-ring-offset);
}

:where(a[href], button, .choice):active:not(:disabled, [aria-disabled="true"], [aria-busy="true"]) {
  translate: 0 var(--translate-recessed);
}

:focus-visible {
  outline: var(--focus-ring-width) solid var(--color-accent);
  outline-offset: var(--focus-ring-offset);
  border-radius: var(--radius-sm);
}

/* The skip link and <main> take focus on purpose; they need no ring of their own. */
main:focus {
  outline: none;
}

::selection {
  background-color: color-mix(in oklab, var(--color-accent) 55%, var(--color-surface));
  color: var(--color-text);
}

/* Utilities */

.muted {
  color: var(--color-text-muted);
}

.truncate {
  display: block;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.stack {
  --stack-gap: var(--space-md);

  display: flex;
  flex-direction: column;
  gap: var(--stack-gap);
}

.row {
  --row-gap: var(--space-sm);

  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--row-gap);
}

.row--end {
  align-items: end;
}

.row--split {
  justify-content: space-between;
}

.row__fill {
  flex: 1;
}

.columns {
  --columns-min-size: 26rem;

  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(var(--columns-min-size), 100%), 1fr));
  align-items: start;
  gap: var(--space-md);
}

/* Readable by a screen reader, invisible on screen. */
.visually-hidden:not(:focus):not(:focus-within) {
  position: absolute;
  inline-size: 1px;
  block-size: 1px;
  padding: 0;
  border: 0;
  overflow: hidden;
  white-space: nowrap;
  clip-path: inset(50%);
}

/* Accessibility preferences */

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-delay: 0ms !important;
    --enter-delay: 0ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    transition-delay: 0ms !important;
    scroll-behavior: auto !important;
  }
}

@media (prefers-contrast: more) {
  :root {
    --color-border: currentcolor;
    --color-text-muted: var(--color-text);
  }
}

@media (forced-colors: active) {
  .control {
    border: var(--border-width) solid currentcolor;
  }
}