/* ============================================================================
 * ebono_brand.css — Ebono brand primitives
 *
 * Tier 1 of a two-tier token system. This file holds what a colour or typeface
 * IS, named for the thing itself. Surfaces map these to semantic roles of their
 * own (--ink, --paper, --accent) in tier 2, and components only ever consume
 * the semantic names. A dark landing page and a light workspace are then two
 * mappings of one brand rather than two brands.
 *
 * CANONICAL SOURCE. These eight colours and three typefaces were already in
 * production on two surfaces before this file existed — ebono.au/styles.css
 * and edu_hero.css carried them independently, with identical names and
 * identical values down to the mixed casing of #ffcBA4, which is how we know
 * one was copied from the other. This file makes that shared vocabulary
 * explicit instead of coincidental.
 *
 * NOT here, deliberately: ebono.au's strand and strobe colours
 * (--hover-archie, --strobe-*, --artie-a/b and siblings). Those drive an
 * interaction that exists only on the corporate site. --hover-artie is dropped
 * from edu_hero.css for the same reason — it was copied there and never used.
 * ============================================================================ */

:root {
  /* ── Palette ─────────────────────────────────────────────────────────── */
  --ebono-black:      #05070a;   /* deepest ground, landing surfaces          */
  --ebono-navy:       #0c1424;   /* primary ink on light, ground on dark      */
  --ebono-navy-edge:  #16264a;   /* rules, borders and dividers on dark       */
  --ebono-silver:     #c7ccd1;   /* body text on dark                         */
  --ebono-silver-dim: #7c838b;   /* secondary text, both grounds              */
  --ebono-white:      #ffffff;   /* paper on light, headings on dark          */
  --ebono-ice:        #a9dcef;   /* brand highlight. ~1.3:1 on white — NOT a
                                    text colour on a light ground. See
                                    --ebono-teal.                             */
  --ebono-ice-dim:    rgba(169, 220, 239, 0.12);  /* ice as a wash            */
  --ebono-teal:       #1c7a9c;   /* the legible accent: same hue as ice,
                                    ~4.9:1 on white, passes WCAG AA as text   */

  /* ── Typography ──────────────────────────────────────────────────────────
     Primitives, in the --ebono- namespace like the colours. A surface maps
     these to its own semantic --font-display / --font-body / --font-mono,
     which is ebono.au's naming and now the fleet's.

     They must stay namespaced. edu_common.css declares the semantic names for
     the light theme and loads after edu_hero.css on the landing page, so any
     shared name it also declares is captured by it — which is exactly how the
     landing page's subtitle silently became Barlow when these were briefly
     called --font-body. */
  --ebono-font-display: 'Fraunces', 'Georgia', serif;
  --ebono-font-body:    'IBM Plex Sans', system-ui, sans-serif;
  --ebono-font-mono:    'IBM Plex Mono', ui-monospace, monospace;
}