/* Base layer: reset, document typography, focus, motion, utilities.
 *
 * No colour literals below this line — only var(--token). See
 * test/design-tokens.test.js, which enforces it.
 */

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

/* `hidden` must always win. Components set `display` in this stylesheet, and
 * a class selector beats the user-agent `[hidden]` rule, so without this a
 * hidden button stays visible. */
[hidden] { display: none !important; }

html {
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
  scrollbar-color: var(--scroll-thumb) transparent;
}

body {
  margin: 0;
  min-height: 100vh;
  background: var(--bg);
  color: var(--fg);
  font-family: var(--font-ui);
  font-size: var(--text-base);
  line-height: var(--leading-body);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

h1, h2, h3, h4, h5, h6 {
  margin: 0;
  font-family: var(--font-display);
  font-weight: var(--weight-bold);
  line-height: var(--leading-tight);
  letter-spacing: var(--tracking-display);
  color: var(--fg-strong);
}

h1 { font-size: var(--text-2xl); }
h2 { font-size: var(--text-xl); }
h3 { font-size: var(--text-lg); }
h4, h5, h6 { font-size: var(--text-base); }

p { margin: 0; }
ul, ol { margin: 0; padding: 0; }
dl, dd { margin: 0; }

a {
  color: var(--accent-ink);
  text-decoration-color: var(--hairline-strong);
  text-underline-offset: 0.15em;
}
a:hover { text-decoration-color: currentColor; }

code, kbd, pre, samp { font-family: var(--font-mono); font-size: 0.92em; }

img, svg, video, canvas { max-width: 100%; }

button, input, select, textarea {
  font: inherit;
  color: inherit;
  letter-spacing: inherit;
}

::selection { background: var(--selection-bg); color: var(--selection-fg); }

::-webkit-scrollbar { width: 10px; height: 10px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb {
  background: var(--scroll-thumb);
  border-radius: var(--radius-pill);
  border: 3px solid transparent;
  background-clip: padding-box;
}
::-webkit-scrollbar-thumb:hover { background: var(--scroll-thumb-hover); background-clip: padding-box; }

/* ---- focus ------------------------------------------------------- */

:focus { outline: none; }

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

/* Programmatic focus after a keyboard action still shows a ring. */
[data-focus-source="keyboard"] :focus {
  outline: var(--focus-width) solid var(--focus-ring);
  outline-offset: var(--focus-offset);
}
[data-focus-source="pointer"] :focus:not(:focus-visible) { outline: none; }

/* ---- motion ------------------------------------------------------ */

[data-animation="off"] *,
[data-animation="off"] *::before,
[data-animation="off"] *::after {
  animation-duration: 0s !important;
  animation-delay: 0s !important;
  animation-iteration-count: 1 !important;
  transition-duration: 0s !important;
  transition-delay: 0s !important;
  scroll-behavior: auto !important;
}

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

/* ---- ambient background ------------------------------------------ */

.ambient {
  position: fixed;
  inset: 0;
  z-index: var(--z-ambient);
  pointer-events: none;
  overflow: hidden;
}

.orb {
  position: absolute;
  border-radius: var(--radius-pill);
  filter: blur(var(--blur-lg));
  opacity: var(--orb-opacity);
}
.orb-a { width: 42vmax; height: 42vmax; left: -12vmax; top: -14vmax; background: var(--orb-a); }
.orb-b { width: 34vmax; height: 34vmax; right: -10vmax; top: 24vh; background: var(--orb-b); }
.orb-c { width: 28vmax; height: 28vmax; left: 32vw; bottom: -14vmax; background: var(--orb-c); }

[data-theme="8bit"] .orb { filter: none; border-radius: 0; }

/* ---- utilities --------------------------------------------------- */

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  clip-path: inset(50%);
  white-space: nowrap;
  border: 0;
}

.eyebrow {
  font-size: var(--text-xs);
  font-weight: var(--weight-bold);
  letter-spacing: var(--tracking-eyebrow);
  text-transform: uppercase;
  color: var(--muted);
}

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

.spacer { flex: 1 1 auto; }

.skip-links { position: absolute; top: 0; left: 0; z-index: var(--z-toast); }

.skip-link {
  position: absolute;
  left: var(--space-2);
  top: var(--space-2);
  transform: translateY(-200%);
  padding: var(--space-2) var(--space-4);
  background: var(--accent);
  color: var(--on-accent);
  border-radius: var(--control-radius);
  font-weight: var(--weight-semibold);
  text-decoration: none;
  white-space: nowrap;
}
.skip-link:focus { transform: translateY(0); }

.noscript {
  margin: var(--space-6);
  padding: var(--space-4);
  border: var(--border-width) solid var(--warn);
  border-radius: var(--radius-md);
  background: var(--warn-soft);
  color: var(--warn-ink);
}

.boot-error {
  margin: var(--space-6) auto;
  max-width: 40rem;
  padding: var(--space-6);
  border: var(--border-width) solid var(--danger);
  border-radius: var(--radius-lg);
  background: var(--danger-soft);
  color: var(--danger-ink);
}
.boot-error pre {
  white-space: pre-wrap;
  overflow-wrap: anywhere;
  background: var(--code-bg);
  color: var(--code-fg);
  padding: var(--space-3);
  border-radius: var(--radius-sm);
}

.icon-sprite { position: absolute; width: 0; height: 0; overflow: hidden; }

.icon {
  width: 1.15em;
  height: 1.15em;
  flex: none;
  display: inline-block;
  vertical-align: -0.2em;
}

/* ---- markdown ---------------------------------------------------- */

.md-p { margin: 0 0 var(--space-3); }
.md-p:last-child { margin-bottom: 0; }

.md-heading {
  margin: var(--space-4) 0 var(--space-2);
  font-size: var(--text-lg);
}
.md-heading:first-child { margin-top: 0; }

.md-list { margin: 0 0 var(--space-3); padding-left: var(--space-5); }
.md-list li { margin-bottom: var(--space-1); }

.md-quote {
  margin: 0 0 var(--space-3);
  padding: var(--space-2) var(--space-4);
  border-left: 3px solid var(--accent-soft);
  color: var(--muted);
}

.md-code {
  margin: 0 0 var(--space-3);
  padding: var(--space-3);
  background: var(--code-bg);
  color: var(--code-fg);
  border: var(--border-width) solid var(--code-border);
  border-radius: var(--radius-sm);
  overflow-x: auto;
}

.md-inline-code {
  padding: 0.1em 0.35em;
  background: var(--code-bg);
  color: var(--code-fg);
  border-radius: var(--radius-sm);
}

.md-link { color: var(--accent-ink); }