/* ==========================================================================
   Base — reset, typography, accessibility helpers.
   Uses logical properties (inline/block) so LTR and RTL share one stylesheet.
   ========================================================================== */
*, *::before, *::after { box-sizing: border-box; }
* { margin: 0; }

html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  font-family: var(--font-body);
  font-size: var(--fs-md);
  line-height: 1.65;
  color: var(--text);
  background: var(--ink-900);
  overflow-x: hidden;
}
:lang(ar) body, :lang(fa) body { line-height: 1.85; }

img, svg { display: block; max-width: 100%; height: auto; }
a { color: inherit; text-decoration: none; }
ul, ol { padding: 0; list-style: none; }
button, input, select, textarea { font: inherit; color: inherit; }

h1, h2, h3, h4 { line-height: 1.2; font-weight: 700; }
h1, h2 { font-family: var(--font-display); }
h1 em, h2 em { font-style: normal; color: var(--yellow-300); }
h3 { font-size: var(--fs-lg); }

:focus-visible { outline: none; box-shadow: var(--ring); border-radius: var(--radius-sm); }

.icon {
  inline-size: 1.15em; block-size: 1.15em; flex: none;
  fill: none; stroke: currentColor; stroke-width: 1.8; stroke-linecap: round; stroke-linejoin: round;
}
.icon-play { fill: currentColor; stroke: none; }
[dir='rtl'] .icon-arrow { transform: scaleX(-1); }

[hidden] { display: none !important; }

.sr-only {
  position: absolute; inline-size: 1px; block-size: 1px; overflow: hidden;
  clip: rect(0 0 0 0); white-space: nowrap;
}
.skip-link {
  position: absolute; inset-inline-start: var(--space-4); inset-block-start: -100px; z-index: 100;
  background: var(--yellow-500); color: var(--text-on-gold); padding: var(--space-2) var(--space-4);
  border-radius: var(--radius-sm); font-weight: 700;
}
.skip-link:focus { inset-block-start: var(--space-4); }

.center { text-align: center; }
.center .btn { margin-block-start: var(--space-6); }

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation: none !important; transition: none !important; scroll-behavior: auto !important; }
}