/* ============================================================================
   AlphaMath — CSEC Additional Mathematics ink palette (CDR-0146)
   SINGLE SOURCE OF TRUTH for the Add Maths purple family.

   Consumed by:
     assets/css/alphamath.css  — @import at the top of the file
     intake.html               — <link> before its inline <style>

   intake.html is a headless doctype+html+meta shell with one inline <style>
   and its own token vocabulary; it does not use alphamath.css. Both
   vocabularies are therefore defined here so a palette change is one edit in
   one file. Before this file existed the two drifted apart — alphamath.css sat
   on Marion Sydney Classic #552583 while intake.html carried #140B2C, and the
   suite rendered as two documents.

   Do not redeclare these tokens in a page's inline <style>: an inline block
   wins over this stylesheet and reintroduces exactly that drift.

   PROVENANCE — read before changing a value.
   --purple #140B2C is Midnight Purple, CEO-specified under CDR-0146 and filed in
   Assets/Corporate Identity/MSE_Approved_Color_Schemes.md §2.

   The rest are NOT filed in §2. They are the Add Maths ink theme's own derived
   values, carried forward from the CEO-approved override block in the older Add
   Maths templates, and shifted cooler than the §2 tints so they sit against
   #140B2C rather than against the warm document lane.

   NAMING, resolved 2026-07-31 (CEO decision, on Brand Guardian finding).
   Three tokens previously reused §2 shade NAMES while carrying different values:

     was            value      §2 register entry it wrongly claimed
     --amethyst     #7E68C6    Amethyst       #9B72CF
     --wisteria     #BCB2DE    Wisteria       #C9B6E4
     --lavender     #EAE6F5    Lavender Mist  #EDE7F6

   The values were right and the names were not, so the names went. They are now
   --purple-mid, --purple-line and --purple-soft, in this file's own idiom and
   claiming nothing from the register. Two of the three were already exact
   duplicates of tokens defined here — --wisteria == --purple-line and
   --lavender == --purple-soft — so the rename also collapsed a duplication.

   Rule: a token in this file may carry a §2 NAME only if it carries the §2
   VALUE. Derived values get derived names.

   Gold, greys and the semantic ramps are NOT part of this family and stay with
   their consuming stylesheet.
   ============================================================================ */

/* One vocabulary, shared by alphamath.css and intake.html. The two-vocabulary
   split this file used to carry was itself the symptom: it is what let three
   tokens keep §2 names at non-§2 values. */
:root{
  --purple:#140B2C;       /* main chrome, links, accents                    */
  --purple-deep:#241348;  /* header/table chrome carrying white text        */
  --purple-mid:#7E68C6;   /* mid violet accent (was --amethyst)             */
  --purple-soft:#EAE6F5;  /* light wash behind --purple text (was --lavender) */
  --purple-line:#BCB2DE;  /* border tint on washed surfaces (was --wisteria)  */
  --purple-20:#0C0619;    /* pressed / hover, one step below the main       */
}