/* ============================================================================
 * Vibecreative — Design Tokens (SLIM v2)
 * Editorial-magazine baseline. Only Fraunces preloaded — Cormorant + JBM
 * degrade to system serif/mono to save 3× TTFB font-blocking.
 * ============================================================================ */

/* Only Fraunces (variable) is loaded via preload+swap in <head>.
 * Cormorant + JetBrains Mono fall back to system serif/monospace. */

:root {
  color-scheme: light;

  /* Paper */
  --paper:            oklch(97.2% 0.008 82);
  --paper-deeper:     oklch(94.5% 0.010 82);
  --paper-shadow:     oklch(91.0% 0.010 82);

  /* Ink */
  --ink:              oklch(14.0% 0.015 60);
  --ink-90:           oklch(20.0% 0.015 60);
  --ink-70:           oklch(38.0% 0.010 60);
  --ink-50:           oklch(58.0% 0.008 60);
  --ink-30:           oklch(80.0% 0.005 60);

  /* Accent */
  --accent:           oklch(52.0% 0.140 45);
  --accent-hot:       oklch(58.0% 0.170 40);
  --accent-quiet:     oklch(52.0% 0.140 45 / 0.10);

  /* Grayscale */
  --slate-100:        oklch(93.0% 0.005 60);
  --slate-300:        oklch(82.0% 0.005 60);
  --slate-500:        oklch(58.0% 0.005 60);
  --slate-700:        oklch(38.0% 0.010 60);
  --slate-900:        oklch(20.0% 0.015 60);

  /* Hairlines */
  --rule:             color-mix(in oklch, var(--ink) 12%, transparent);
  --rule-strong:      color-mix(in oklch, var(--ink) 20%, transparent);
  --rule-faint:       color-mix(in oklch, var(--ink) 06%, transparent);

  /* SIMPLIFIED 2-zone color-shift (down from 6): warm-cream → sienna at 60% */
  --stop-warm:        oklch(97.2% 0.008 82);   /* default */
  --stop-sienna:      oklch(93.5% 0.014 40);   /* after 60% scroll */

  /* TYPOGRAPHY — only Fraunces stays first-in-stack; others go system */
  --font-display:     "Fraunces", "Times New Roman", Georgia, serif;
  --font-serif:       Georgia, "Times New Roman", serif;
  --font-sans:        -apple-system, "Söhne", "Helvetica Neue", Helvetica, Arial, sans-serif;
  --font-mono:        ui-monospace, "SF Mono", Menlo, Consolas, monospace;

  --scale-ratio:     1.618;
  --step-0:  1rem;
  --step-1:  calc(var(--step-0) * var(--scale-ratio));
  --step-2:  calc(var(--step-1) * var(--scale-ratio));
  --step-3:  calc(var(--step-2) * var(--scale-ratio));

  --hero-headline:     clamp(84px, 15vw, 220px);
  --section-headline:  clamp(56px, 9vw, 148px);
  --section-heading:   clamp(28px, 3.4vw, 52px);
  --pull-quote:        clamp(28px, 3vw, 56px);
  --meta-small:        11px;
  --body-size:         17px;

  --leading-cover:       0.92;
  --leading-body:        1.65;

  /* Rhythm */
  --rhythm:    8px;
  --rhythm-2:  16px;
  --rhythm-3:  24px;
  --rhythm-4:  32px;
  --rhythm-6:  48px;
  --rhythm-8:  64px;
  --rhythm-12: 96px;
  --rhythm-16: 128px;
  --rhythm-24: 192px;
  --rhythm-32: 256px;

  --grid-cols:    12;
  --grid-gutter:  clamp(16px, 2vw, 32px);
  --grid-margin:  clamp(24px, 6vw, 96px);
  --grid-max:     1440px;

  --measure-prose:      65ch;

  /* Motion — reduced set */
  --ease-signature:  cubic-bezier(0.16, 1, 0.3, 1);
  --ease-micro:      cubic-bezier(0.4, 0, 0.2, 1);
  --dur-signature:   900ms;
  --dur-micro:       200ms;

  /* Z */
  --z-nav:     200;
  --z-grain:   1;

  --hairline: 1px;
}

@media (max-width: 1024px) {
  :root {
    --grid-cols: 6;
    --body-size: 16px;
    --hero-headline: clamp(64px, 14vw, 128px);
    --section-headline: clamp(42px, 9vw, 92px);
  }
}
@media (max-width: 640px) {
  :root {
    --grid-cols: 4;
    --grid-margin: clamp(16px, 5vw, 32px);
  }
}

/* View Transitions — native, cheap */
@view-transition { navigation: auto; }
::view-transition-old(root),
::view-transition-new(root) {
  animation-duration: var(--dur-signature);
  animation-timing-function: var(--ease-signature);
}

/* Reduced-motion */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
  video[autoplay] { display: none !important; }
}
