/* ==========================================================================
   Yujverse — Base: reset, document, typography primitives, layout, utilities
   ========================================================================== */

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

html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }

body {
  font-family: var(--font-body);
  font-size: var(--fs-body);
  line-height: var(--lh-body);
  color: var(--ink);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}

img, picture, video, canvas, svg { display: block; max-width: 100%; }
input, button, textarea, select { font: inherit; color: inherit; }
a { color: inherit; text-decoration: none; }
ul[role='list'], ol[role='list'] { list-style: none; padding: 0; }

/* ---- Headings ---- */
h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 400;
  line-height: var(--lh-tight);
  letter-spacing: .01em;
  color: var(--ink);
}
h1 { font-size: var(--fs-h1); }
h2 { font-size: var(--fs-h2); }
h3 { font-family: var(--font-serif); font-size: var(--fs-h3); line-height: var(--lh-snug); }
p  { max-width: var(--measure); }

/* ---- Selection & focus ---- */
::selection { background: var(--gold); color: var(--brick); }
:focus-visible {
  outline: none;
  box-shadow: 0 0 0 3px var(--bg), 0 0 0 5px var(--accent);
  border-radius: var(--radius-sm);
}

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

.section { padding-block: var(--section-y); position: relative; }
.section--tight { padding-block: clamp(2.5rem, 1.5rem + 4vw, 4.5rem); }
.section--cream { background: var(--cream-warm); }
.section--dark  { background: linear-gradient(160deg, var(--dark), var(--dark-2)); color: var(--on-dark); }
.section--dark h1, .section--dark h2, .section--dark h3 { color: var(--on-dark); }

/* Stack / cluster helpers */
.stack > * + * { margin-top: var(--space-4); }
.center-x { display: flex; flex-direction: column; align-items: center; text-align: center; }

/* Grid helpers */
.grid { display: grid; gap: var(--gutter); }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }
@media (max-width: 900px) { .grid-3, .grid-4 { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 600px) { .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; } }

/* ==========================================================================
   Utilities
   ========================================================================== */
.text-center { text-align: center; }
.muted { color: var(--ink-mute); }
.accent { color: var(--accent); }
.brick  { color: var(--brick); }
.sr-only {
  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; left: 50%; transform: translateX(-50%) translateY(-120%);
  top: 8px; background: var(--brick); color: var(--cream);
  padding: .6rem 1.1rem; border-radius: var(--radius-full); z-index: var(--z-toast);
  transition: transform var(--dur) var(--ease-out);
}
.skip-link:focus { transform: translateX(-50%) translateY(0); }

/* ==========================================================================
   Scroll reveal — progressive enhancement.
   Hidden state applies ONLY when JS is active (html.js). Without JS the
   content renders fully visible, so nothing depends on JS to be seen.
   ========================================================================== */
.js .reveal { opacity: 0; transform: translateY(18px); transition: opacity var(--dur-slow) var(--ease-out), transform var(--dur-slow) var(--ease-out); }
.js .reveal.is-in { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) {
  .js .reveal { opacity: 1 !important; transform: none !important; transition: none; }
}