/* base.css — element defaults + the accessibility contract.
   No color literals, no font-family, logical properties only (check.mjs enforces). */

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

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

body {
  margin: 0;
  font-family: var(--font-body);
  font-size: var(--text-m);
  line-height: var(--leading-body);
  background-color: var(--surface);
  color: var(--text);
}

h1,
h2,
h3,
h4,
h5,
h6 {
  font-family: var(--font-display);
  font-weight: 480;
  line-height: var(--leading-display);
  text-wrap: balance;
  margin-block: 0 var(--space-4);
}

p,
ul,
ol,
figure,
blockquote {
  margin-block: 0 var(--space-4);
}

p,
li {
  max-inline-size: var(--measure);
}

ul,
ol {
  padding-inline-start: var(--space-5);
}

a {
  color: inherit;
  text-decoration-color: var(--accent);
  text-decoration-thickness: 1px;
  text-underline-offset: 0.2em;
}

img {
  max-inline-size: 100%;
  block-size: auto;
}

table {
  border-collapse: collapse;
  font-variant-numeric: tabular-nums;
}

:focus-visible {
  outline: 2px solid var(--focus-ring);
  outline-offset: 2px;
}

:focus {
  scroll-margin-block-start: calc(var(--nav-block) + var(--space-4));
}

[id] {
  scroll-margin-block-start: calc(var(--nav-block) + var(--space-4));
}

/* Interactive comfort */
a,
button {
  touch-action: manipulation;
  -webkit-tap-highlight-color: color-mix(in srgb, var(--accent) 24%, transparent);
}

button {
  font: inherit;
  color: inherit;
  cursor: pointer;
}

/* Visually-hidden until focused (skip link) or permanently (logo text) */
.visually-hidden {
  position: absolute;
  inline-size: 1px;
  block-size: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip-path: inset(50%);
  white-space: nowrap;
  border: 0;
}

.skip-link {
  position: absolute;
  inset-block-start: var(--space-3);
  inset-inline-start: var(--space-3);
  z-index: 10;
  padding-block: var(--space-2);
  padding-inline: var(--space-4);
  background-color: var(--surface);
  color: var(--text);
  border: 1px solid var(--hairline);
  border-radius: var(--radius);
  text-decoration: none;
  transform: translateY(calc(-100% - var(--space-4)));
  transition: transform var(--dur-fast) var(--ease-settle);
}

.skip-link:focus-visible {
  transform: translateY(0);
}

/* Global motion kill-switch: reduced-motion zeroes everything (the accessibility contract) */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}