/* ============================================================================
   BASE — reset, typography, accessibility floor, shared utilities.
   Consumes semantic tokens only (never the --aur-* private layer).
   ============================================================================ */

/* Reset */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--space-3xl) + 3rem);
}

body {
  font-family: var(--font-body);
  font-size: var(--body-size);
  line-height: var(--body-line-height);
  color: var(--color-text-primary);
  background-color: var(--color-bg);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  min-height: 100dvh;
}

@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;
  }
}

img,
svg,
picture {
  display: block;
  max-width: 100%;
}

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

a[href] {
  color: var(--color-text-accent);
  text-decoration: underline;
  text-underline-offset: 0.22em;
  text-decoration-thickness: 1px;
}

a[href]:hover {
  text-decoration-thickness: 2px;
}

ul[class],
ol[class] {
  list-style: none;
}

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

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

figure {
  margin: 0;
}

hr {
  border: 0;
  border-top: var(--hairline);
}

::selection {
  background: var(--color-surface-inverted);
  color: var(--color-text-inverted);
}

/* ----------------------------------------------------------------------------
   ACCESSIBILITY FLOOR (WCAG 2.2 AA — non-negotiable)
   -------------------------------------------------------------------------- */

/* Skip link — first focusable element on every page */
.skip-link {
  position: fixed;
  inset-block-start: var(--space-sm);
  inset-inline-start: var(--space-sm);
  z-index: var(--z-toast);
  padding: var(--space-xs) var(--space-md);
  background: var(--color-surface-inverted);
  color: var(--color-text-inverted);
  border-radius: var(--radius-s);
  transform: translateY(-300%);
  transition: transform var(--motion-fast) var(--ease-out);
  text-decoration: none;
}

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

/* Focus appearance (2.4.11): visible ring, ≥3:1, ≥2px perimeter */
:where(a, button, input, select, textarea, [tabindex]):focus-visible {
  outline: 2px solid var(--color-focus);
  outline-offset: 3px;
  border-radius: var(--radius-s);
}

body[data-theme-surface="inverted"] :where(a, button, input, select, textarea, [tabindex]):focus-visible {
  outline-color: var(--color-focus-inverted);
}

/* Target size (2.5.8): interactive targets ≥44 CSS px in this comfortable UI */
:where(button, a[role="button"], .nav-link, .drawer-link, input, select, textarea) {
  min-height: 44px;
}

/* Visually-hidden but available to AT */
.visually-hidden {
  position: absolute !important;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
  border: 0;
}

/* ----------------------------------------------------------------------------
   TYPOGRAPHY — display serif vs body sans (typeRoleAssignment: display/heading=serif)
   -------------------------------------------------------------------------- */

.font-display {
  font-family: var(--font-display);
  font-weight: 500;
  line-height: 1.05;
  letter-spacing: -0.01em;
}

.uppercase-label {
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: var(--tracking-wide);
  text-transform: uppercase;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: var(--space-xs);
  color: var(--color-text-accent);
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: var(--tracking-wide);
  text-transform: uppercase;
}

.eyebrow::before {
  content: "";
  inline-size: var(--space-lg);
  block-size: 1px;
  background: var(--color-accent);
}

.eyebrow--inverted {
  color: var(--color-text-inverted-accent);
}

.eyebrow--inverted::before {
  background: var(--color-accent);
}

.gold-numeral {
  font-family: var(--font-display);
  font-weight: 500;
  font-variant-numeric: lining-nums tabular-nums;
  color: var(--color-text-accent);
}

/* Numerals / data (monospaceScope: data-only) */
.tabular {
  font-variant-numeric: tabular-nums;
}

.lede {
  font-size: var(--text-lg);
  line-height: 1.65;
  color: var(--color-text-secondary);
}

.prose p + p {
  margin-block-start: var(--space-sm);
}

/* ----------------------------------------------------------------------------
   LAYOUT PRIMITIVES
   -------------------------------------------------------------------------- */

.container {
  inline-size: min(100% - 2 * var(--gutter), var(--container));
  margin-inline: auto;
}

.container--text {
  inline-size: min(100% - 2 * var(--gutter), var(--container-text));
  margin-inline: auto;
}

.container--wide {
  inline-size: min(100% - 2 * var(--gutter), var(--container-wide));
  margin-inline: auto;
}

.section {
  padding-block: var(--space-3xl);
}

@media (min-width: 768px) {
  .section {
    padding-block: var(--space-4xl);
  }
}

/* Section header with the "Gold Rule" pattern */
.section-head {
  display: grid;
  gap: var(--space-sm);
  margin-block-end: var(--space-xl);
}

.section-head__title {
  font-family: var(--font-display);
  font-size: var(--text-3xl);
  font-weight: 500;
  line-height: 1.08;
}

.section-head__title::after {
  content: "";
  display: block;
  inline-size: 3.5rem;
  block-size: 1px;
  margin-block-start: var(--space-sm);
  background: var(--color-accent);
}

.section-head--center .section-head__title::after {
  margin-inline: auto;
}

.section-head--center {
  text-align: center;
  justify-items: center;
}

/* Grid helpers */
.grid-1 {
  display: grid;
  gap: var(--space-md);
}

.grid-2,
.grid-3,
.grid-4 {
  display: grid;
  gap: var(--space-md);
}

@media (min-width: 700px) {
  .grid-2,
  .grid-3,
  .grid-4 {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 1024px) {
  .grid-3,
  .grid-4 {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
  .grid-4 {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

/* Split: text + image, stacked on mobile */
.split {
  display: grid;
  gap: var(--space-xl);
}

@media (min-width: 900px) {
  .split {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 1fr);
    align-items: center;
    gap: var(--space-3xl);
  }
  .split--rev .split__text {
    order: 2;
  }
}

/* Stat row (horizontal snap on mobile) */
.stat-row {
  display: grid;
  gap: var(--space-md);
}

@media (min-width: 700px) {
  .stat-row {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

/* Inverted (day/evening rhythm — emit via .section--evening) */
.section--evening,
.surface-evening {
  background-color: var(--color-surface-inverted);
  color: var(--color-text-inverted);
}

.section--evening ::selection {
  background: var(--color-text-inverted);
  color: var(--color-surface-inverted);
}

/* Visibility intent for scroll-reveal (JS toggles; motion-safe only).
   Hidden state requires html.js so content is never lost without scripting. */
.js [data-reveal] {
  opacity: 0;
  transform: translateY(14px);
  transition: opacity var(--motion-base) var(--ease-out), transform var(--motion-base) var(--ease-out);
}

.js [data-reveal].is-revealed {
  opacity: 1;
  transform: none;
}

@media (prefers-reduced-motion: reduce) {
  .js [data-reveal] {
    opacity: 1;
    transform: none;
    transition: none;
  }
}