/* ─────────────────────────────────────────────────────────────────────
 * Theme · dune
 *   Architecture / gallery brochure restraint. Warm desert sand canvas,
 *   charcoal-brown ink, near-zero accent saturation (clay-brown). Inter
 *   for display (architecture portfolios love Inter / Helvetica), Source
 *   Serif for body (gallery wall-text feel). SIGNATURE: NO decoration,
 *   NO pattern, NO vignette — purity. Like monochrome-print but warmer
 *   and with sans-serif headlines instead of serif.
 *
 *   character knobs:
 *     • hero numbers   — Inter, weight 300 (light, refined)
 *     • rule           — 1px solid faint sand hairline
 *     • card           — refined small radius (paper-lift)
 *     • surface        — clean (NO pattern, NO vignette)
 *     • motion         — quietest pace (sand barely moves)
 * ───────────────────────────────────────────────────────────────────── */
:root {
  /* ─── palette ─── */
  --shell:        #dcc8a5;
  --surface:      #f0e6d2;
  --surface-2:    #f6ecd9;
  --surface-3:    #e3d7bf;
  --text:         #1f1a14;             /* charcoal-brown ink */
  --text-2:       #2d2620;
  --text-mute:    #6b5c46;
  --text-faint:   #9a8c70;
  --rule:         #c4b496;
  --accent:       #8c6a48;             /* muted clay (low saturation) */
  --accent-soft:  rgba(140, 106, 72, 0.10);
  --accent-glow:  rgba(140, 106, 72, 0.25);

  /* ─── fonts ─── */
  --font-display-cn: "Noto Sans SC", "Source Han Sans SC", -apple-system, sans-serif;
  --font-display-en: "Inter", "Helvetica Neue", "Helvetica", sans-serif;
  --font-body:       "Source Serif 4", "Source Serif Pro", "Noto Serif SC", serif;
  --font-mono:       "JetBrains Mono", "SF Mono", ui-monospace, monospace;
  --font-features:   "ss01", "ss02", "cv02", "tnum";

  /* ─── motion: quietest gallery pace ─── */
  --dur-base:       780ms;
  --dur-slow:       1250ms;
  --dur-cinematic:  1750ms;

  /* ─── design identity: gallery restraint ─── */
  --r-card:        var(--r-xs);     /* 4px — barely-there refinement */
  --r-stage:       0;
  --rule-w:        1px;
  --rule-style:    solid;
  --hero-num-font:    var(--font-display-en);
  --hero-num-style:   normal;
  --hero-num-weight:  300;
  --hero-num-track:   -0.04em;
  --stage-pad-x:   140px;              /* generous = refined */
  --stage-pad-y:   100px;
  --card-shadow:
    0 1px 0 var(--rule),
    0 18px 44px rgba(60, 40, 20, 0.10);
  --shadow-stage:
    0 60px 160px rgba(60, 40, 20, 0.30),
    0 0 0 1px rgba(0, 0, 0, 0.04);
  /* SIGNATURE: NO surface-pattern, NO vignette — desert dusk purity. */
}