/*
 * Base — reset + global typography + reduced-motion hooks.
 * Mobile-first. Uses logical properties where sensible.
 * NEO-79 ux-spec §10 (a11y), §4 (motion doctrine).
 */

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

* {
  margin: 0;
  padding: 0;
}

html {
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
  -moz-tab-size: 4;
  tab-size: 4;
  scroll-behavior: smooth;
}

html,
body {
  block-size: 100%;
}

body {
  background-color: var(--color-bg);
  color: var(--color-text);
  font-family: var(--font-body);
  font-size: var(--text-body);
  font-weight: 400;
  line-height: var(--leading-normal);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
  min-block-size: 100svh;
}

img,
svg,
video,
canvas,
picture {
  display: block;
  max-inline-size: 100%;
}

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

button {
  background: none;
  border: 0;
  cursor: pointer;
}

a {
  color: inherit;
  text-decoration: none;
}

ul,
ol {
  list-style: none;
}

/* ---------- Global typography ---------- */
h1,
h2,
h3,
h4,
h5,
h6 {
  font-family: var(--font-display);
  font-weight: 500;
  line-height: var(--leading-tight);
  letter-spacing: var(--tracking-display);
  color: var(--color-text);
}

h1 {
  font-size: var(--text-display-xl);
  letter-spacing: var(--tracking-display-tight);
  font-weight: 500;
}

h2 {
  font-size: var(--text-display-l);
}

h3 {
  font-size: var(--text-display-m);
}

h4 {
  font-size: var(--text-display-s);
}

p {
  color: var(--color-text-muted);
  max-inline-size: 64ch;
}

strong {
  font-weight: 600;
  color: var(--color-text);
}

code,
kbd,
pre,
samp {
  font-family: var(--font-mono);
  font-size: 0.95em;
}

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

/* ---------- Utility classes used from components ---------- */
.mono {
  font-family: var(--font-mono);
  font-size: var(--text-mono-sm);
  letter-spacing: var(--tracking-mono-wide);
  text-transform: uppercase;
  color: var(--color-text-muted);
}

.mono-xs {
  font-family: var(--font-mono);
  font-size: var(--text-mono-xs);
  letter-spacing: var(--tracking-mono-wide);
  text-transform: uppercase;
  color: var(--color-text-muted);
}

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

.sr-only {
  position: absolute;
  inline-size: 1px;
  block-size: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* Skip link — first focusable element on every page (§10). Hidden until focused. */
.skip-link {
  position: absolute;
  inset-block-start: var(--space-2);
  inset-inline-start: var(--space-2);
  z-index: calc(var(--z-nav) + 1);
  padding: var(--space-3) var(--space-4);
  background: var(--color-bg);
  color: var(--color-text);
  border: var(--focus-ring-width) solid var(--color-accent);
  font-family: var(--font-mono);
  font-size: var(--text-mono-sm);
  letter-spacing: var(--tracking-mono);
  text-transform: uppercase;
  transform: translateY(calc(-100% - var(--space-4)));
  transition: transform var(--motion-fast) var(--ease-out);
}

.skip-link:focus-visible {
  transform: translateY(0);
  outline: none;
}

/* ---------- Layout primitives ---------- */
.container {
  inline-size: 100%;
  max-inline-size: var(--container-max);
  margin-inline: auto;
  padding-inline: var(--gutter-mobile);
}

@media (min-width: 768px) {
  .container {
    padding-inline: var(--gutter-desktop);
  }
}

.stack > * + * {
  margin-block-start: var(--space-5);
}

.divider {
  border-block-start: var(--border-hairline);
  inline-size: 100%;
}

.page-main {
  min-block-size: 100svh;
  padding-block-start: var(--nav-height);
}

/* ---------- Focus states (§10) ---------- */
:focus-visible {
  outline: var(--focus-ring-width) solid var(--focus-ring-color);
  outline-offset: var(--focus-ring-offset);
  border-radius: var(--radius-xs);
}

/* ---------- prefers-reduced-motion (§4 doctrine + §10 a11y) ---------- */
/*
 * Global hook. Per-component motion additionally respects this via its own rules.
 * Rule: if the user asked for less motion, we honour it everywhere. Transforms and
 * transitions are neutralised; smooth-scroll is disabled.
 */
@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
    scroll-behavior: auto !important;
  }
}