/* ==========================================================================
   Prime UC — Global / reset / layout primitives
   ========================================================================== */

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

* { margin: 0; }

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: auto; /* JS smoothing owns scroll feel */
}

body {
  background: var(--color-bg);
  color: var(--color-text);
  font-family: var(--font-sans);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: clip;
  min-height: 100vh;
}

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

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

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

:focus-visible {
  outline: 2px solid var(--color-accent-bright);
  outline-offset: 3px;
  border-radius: 4px;
}

/* ---- Layout helpers ---- */
.shell {
  width: 100%;
  max-width: 1320px;
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.measure { max-width: var(--measure); }
.measure-narrow { max-width: var(--measure-narrow); }

.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 */
.skip-link {
  position: fixed;
  top: var(--space-4);
  left: var(--space-4);
  z-index: 200;
  background: var(--color-accent);
  color: var(--color-bg-deep);
  padding: 0.6em 1em;
  border-radius: 8px;
  font-weight: 600;
  transform: translateY(-150%);
  transition: transform var(--dur-fast) var(--ease-out-expo);
}
.skip-link:focus { transform: translateY(0); }

/* Film-grain atmosphere overlay (compositor-friendly, fixed) */
.grain {
  position: fixed;
  inset: 0;
  z-index: 90;
  pointer-events: none;
  opacity: 0.05;
  mix-blend-mode: overlay;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='160' height='160'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='2' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
}

/* Vignette to deepen the cinematic frame */
.vignette {
  position: fixed;
  inset: 0;
  z-index: 88;
  pointer-events: none;
  background: radial-gradient(120% 90% at 50% 42%, transparent 52%, var(--color-bg-deep) 130%);
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
    scroll-behavior: auto !important;
  }
}