/* =====================================================================
   VIVIDVERSE HUB - BASE LAYER
   Reset, hallway defaults, shared primitives. World-agnostic.
   ===================================================================== */

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

* { margin: 0; }

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

body {
  background: var(--surface);
  color: var(--ink);
  font-family: var(--font-body);
  font-size: var(--type-body);
  line-height: var(--leading-body);
  -webkit-font-smoothing: antialiased;
  min-height: 100dvh;
}

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

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

h1, h2, h3, h4 {
  font-family: var(--font-display);
  line-height: var(--leading-tight);
  letter-spacing: var(--tracking-display);
  overflow-wrap: break-word;
}

p { max-width: var(--measure); }

a {
  color: inherit;
  text-decoration-color: var(--accent);
  text-decoration-thickness: 2px;
  text-underline-offset: 0.2em;
}

a:hover { color: var(--accent); }

:focus-visible {
  outline: 3px solid var(--accent);
  outline-offset: 3px;
}

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

/* ------------------------------------------------------------------ */
/* Primitives                                                          */
/* ------------------------------------------------------------------ */

.wrap {
  max-width: var(--page-max);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.kicker {
  font-family: var(--font-body);
  font-size: var(--type-caption);
  font-weight: 600;
  letter-spacing: var(--tracking-caps);
  text-transform: uppercase;
  color: var(--accent);
}

.hero-type {
  font-family: var(--font-display);
  font-size: var(--type-hero);
  font-weight: 900;
  line-height: var(--leading-tight);
}

/* Reveal choreography: js/reveal.js flips data-revealed via
   IntersectionObserver. Composition survives reduced-motion. */
[data-reveal] {
  opacity: 0;
  transform: translateY(1.25rem);
  transition:
    opacity var(--dur-slow) var(--ease-standard),
    transform var(--dur-slow) var(--ease-standard);
}

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

/* Threshold wash: fallback crossfade for browsers without the
   View Transition API. theme.js drives it. */
.wash {
  position: fixed;
  inset: 0;
  background: var(--wash);
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--dur-base) ease-out;
  z-index: 999;
}

.wash[data-active] { opacity: 1; pointer-events: auto; }

/* Sound is always opt-in; preference persists site-wide. */
.sound-toggle[aria-pressed="false"] .on,
.sound-toggle[aria-pressed="true"] .off { display: none; }

/* ------------------------------------------------------------------ */
/* Accessibility                                                       */
/* ------------------------------------------------------------------ */

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }

  [data-reveal] {
    opacity: 1;
    transform: none;
    transition: none;
  }

  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
  border: 0;
}

.skip-link {
  position: absolute;
  top: -100%;
  left: var(--space-2);
  background: var(--ink);
  color: var(--surface);
  padding: var(--space-1) var(--space-2);
  z-index: 1000;
}

.skip-link:focus { top: var(--space-2); }