/* ==========================================================================
   INDREVA TRADE GROUP — Design tokens
   Palette, type scale, spacing, easing. Every colour used on the site
   must resolve to one of the tokens below — no raw hex outside this file.
   ========================================================================== */

:root {
  /* ---- Brand palette (exact values — do not alter) ---- */
  --c-chrome-silver: #B8BCC2;
  --c-deep-blue-grey: #2E3A46;
  --c-slate-blue: #5C7285;
  --c-platinum-white: #F3F4F6;
  --c-steel-grey: #8A929B;
  --c-charcoal: #1C2126;
  --c-ice-blue: #A9C6DA;

  /* ---- Semantic tokens (pairing rules enforced here, not per-component) ----
     Default site surface is now light (Platinum White / flowy ice-blue-grey)
     with dark logo/text, per brand direction. Charcoal stays reserved for
     three deliberate dark zones: the footer, the mobile nav overlay, and
     the Vision page (the brief's one "deep dark" chapter). Those zones use
     the --*-on-dark tokens below directly instead of the default ones. */
  --bg-charcoal: var(--c-charcoal);
  --bg-deep: var(--c-deep-blue-grey);
  --bg-platinum: var(--c-platinum-white);
  --bg-slate: var(--c-slate-blue);

  --text-on-charcoal: var(--c-chrome-silver);
  --text-on-charcoal-strong: var(--c-platinum-white);
  --text-on-deep: var(--c-chrome-silver);
  --text-on-platinum: var(--c-charcoal);
  --text-on-platinum-muted: var(--c-deep-blue-grey);

  --accent: var(--c-ice-blue);
  --accent-on-dark: var(--c-ice-blue);

  --border-on-dark: rgba(184, 188, 194, 0.18);
  --border-on-light: rgba(46, 58, 70, 0.14);

  /* ---- Default surface (the light theme) ---- */
  --surface-bg: var(--c-platinum-white);
  --surface-text: var(--c-charcoal);
  --surface-text-strong: var(--c-deep-blue-grey);
  /* Steel Grey on Platinum White is ~3:1 — fails WCAG AA for small text.
     Slate Blue clears 4.5:1 there, so it's the muted tone on the light
     surface; Steel Grey stays reserved for the dark surface (footer,
     Vision), where it reads fine against Charcoal. */
  --surface-muted: var(--c-slate-blue);
  --surface-border: var(--border-on-light);
  --surface-card-bg: rgba(46, 58, 70, 0.04);
  /* Eyebrow/label accent: Slate Blue on the light default surface, Ice Blue
     wherever a page opts back into the dark surface (see below). */
  --accent-label: var(--c-slate-blue);

  /* ---- Dark surface (footer, mobile nav overlay, Vision) ---- */
  --surface-bg-dark: var(--c-charcoal);
  --surface-text-dark: var(--c-chrome-silver);
  --surface-text-dark-strong: var(--c-platinum-white);
  --surface-border-dark: var(--border-on-dark);

  /* ---- Typography ---- */
  --font-display: 'Satoshi', 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-body: 'IBM Plex Sans', -apple-system, BlinkMacSystemFont, sans-serif;
  /* Reserved for the "INDREVA" logotype only, per brand identity — never used for running headings. */
  --font-wordmark: 'Michroma', var(--font-display);

  --track-wordmark: 0.09em;
  --track-label: 0.22em;
  --track-tight: -0.01em;

  --fs-2xs: 0.6875rem;
  --fs-xs: 0.8125rem;
  --fs-sm: 0.9375rem;
  --fs-base: 1rem;
  --fs-md: 1.125rem;
  --fs-lg: 1.375rem;
  --fs-xl: 1.75rem;
  --fs-2xl: 2.5rem;
  --fs-3xl: 3.5rem;
  --fs-4xl: 4.75rem;
  --fs-5xl: 6.5rem;

  /* ---- Spacing scale ---- */
  --sp-1: 0.25rem;
  --sp-2: 0.5rem;
  --sp-3: 0.75rem;
  --sp-4: 1rem;
  --sp-5: 1.5rem;
  --sp-6: 2rem;
  --sp-7: 3rem;
  --sp-8: 4.5rem;
  --sp-9: 6.5rem;
  --sp-10: 9rem;

  --container-max: 1440px;
  --container-pad: clamp(1.25rem, 4vw, 4rem);

  /* ---- Motion ---- */
  --ease-precision: cubic-bezier(0.65, 0, 0.15, 1);
  --ease-out-soft: cubic-bezier(0.16, 1, 0.3, 1);
  --ease-in-soft: cubic-bezier(0.7, 0, 0.84, 0);
  --dur-fast: 220ms;
  --dur-base: 420ms;
  --dur-slow: 640ms;

  --z-canvas-bg: 0;
  --z-canvas: 1;
  --z-linework: 2;
  --z-content: 10;
  --z-header: 100;
  --z-transition: 200;
  --z-cursor: 300;
  --z-progress: 250;
}