/* ============================================================================
   Divider patterns — shared between /design-system (where they live as
   foundation elements) and / (homepage, where they're applied between
   sections via a dev toggle until we pick).

   Four CSS-only geometries: D1 double-notch, D2 ticks, D3 dot grid,
   D5 circle anchor. Each composes with:
     • Tone modifier — --patina, --plinth (defaults to kinpaku via currentColor)
     • Texture modifier — --tex-leaf, --tex-patina, --tex-dust (uses the brand
       accent images as the actual fill, with the pattern as a mask)

   Depends on the brand tokens in kinpaku-tokens.css (--ks-kinpaku, --ks-patina).
   ============================================================================ */

.ksd-divider {
  width: 100%;
  color: var(--ks-kinpaku);
}

/* Tone modifiers. Override currentColor so any pattern can be re-tinted
   without touching its geometry. Patina reads as oxidized copper alongside
   the gold; plinth is a low-chroma warm dark that sits one step above the
   lacquer bg and reads as inscribed into the surface. */
.ksd-divider--patina { color: var(--ks-patina); }
.ksd-divider--plinth { color: oklch(42% 0 0); }

/* Texture-fill modifiers. The pattern's geometry becomes a mask; the brand
   accent texture becomes the visible fill. Filters match the .ks-accent-band
   tuning so the inline divider reads as the same material as the foundation
   textures. */
.ksd-divider--tex-leaf {
  --ksd-fill: url("/assets/neo-kinpaku/kinpaku-gold-leaf.png");
  --ksd-fill-filter: saturate(1.15) contrast(1.08);
}
.ksd-divider--tex-patina {
  --ksd-fill: url("/assets/neo-kinpaku/verdigris-patina.png");
  --ksd-fill-filter: saturate(1.18) contrast(1.06);
}
.ksd-divider--tex-dust {
  --ksd-fill: url("/assets/neo-kinpaku/gold-dust-rule.png");
  --ksd-fill-filter: saturate(1.22) contrast(1.15) brightness(1.12);
}

/* ----- Geometry: D1 double-notch ----- */
.ksd-divider--double-notch {
  position: relative;
  height: 8px;
}
.ksd-divider--double-notch::before,
.ksd-divider--double-notch::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  height: 1.5px;
  background: currentColor;
}
.ksd-divider--double-notch::before {
  top: 0;
  background: linear-gradient(90deg, currentColor 0 9%, transparent 9% 11.5%, currentColor 11.5%);
}
.ksd-divider--double-notch::after {
  bottom: 0;
}

/* ----- Geometry: D2 ticks ----- */
.ksd-divider--ticks {
  height: 18px;
  background:
    repeating-linear-gradient(
      -65deg,
      currentColor 0 1.4px,
      transparent 1.4px 12px
    );
}

/* ----- Geometry: D3 dots ----- */
.ksd-divider--dots {
  height: 18px;
  background-image: radial-gradient(circle, currentColor 0.9px, transparent 1.4px);
  background-size: 7px 6px;
  background-position: 0 1px;
  background-repeat: repeat;
}

/* ----- Geometry: D5 anchor ----- */
.ksd-divider--anchor {
  position: relative;
  height: 14px;
  display: flex;
  align-items: center;
  gap: 0;
}
.ksd-divider--anchor::before {
  content: "";
  width: 11px;
  height: 11px;
  border: 1.5px solid currentColor;
  border-radius: 50%;
  flex: none;
}
.ksd-divider--anchor::after {
  content: "";
  flex: 1;
  height: 1.5px;
  background: currentColor;
}

/* ----- Texture-masked overrides per pattern ----- */
.ksd-divider--ticks:is(.ksd-divider--tex-leaf, .ksd-divider--tex-patina, .ksd-divider--tex-dust) {
  background: var(--ksd-fill) center / cover no-repeat;
  filter: var(--ksd-fill-filter);
  -webkit-mask-image: repeating-linear-gradient(-65deg, black 0 1.4px, transparent 1.4px 12px);
          mask-image: repeating-linear-gradient(-65deg, black 0 1.4px, transparent 1.4px 12px);
}

.ksd-divider--dots:is(.ksd-divider--tex-leaf, .ksd-divider--tex-patina, .ksd-divider--tex-dust) {
  background-image: var(--ksd-fill);
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
  filter: var(--ksd-fill-filter);
  -webkit-mask-image: radial-gradient(circle, black 0.9px, transparent 1.4px);
          mask-image: radial-gradient(circle, black 0.9px, transparent 1.4px);
  -webkit-mask-size: 7px 6px;
          mask-size: 7px 6px;
  -webkit-mask-repeat: repeat;
          mask-repeat: repeat;
  -webkit-mask-position: 0 1px;
          mask-position: 0 1px;
}

.ksd-divider--double-notch:is(.ksd-divider--tex-leaf, .ksd-divider--tex-patina, .ksd-divider--tex-dust)::before,
.ksd-divider--double-notch:is(.ksd-divider--tex-leaf, .ksd-divider--tex-patina, .ksd-divider--tex-dust)::after {
  background: var(--ksd-fill) center / cover no-repeat;
  filter: var(--ksd-fill-filter);
}
.ksd-divider--double-notch:is(.ksd-divider--tex-leaf, .ksd-divider--tex-patina, .ksd-divider--tex-dust)::before {
  -webkit-mask-image: linear-gradient(90deg, black 0 9%, transparent 9% 11.5%, black 11.5%);
          mask-image: linear-gradient(90deg, black 0 9%, transparent 9% 11.5%, black 11.5%);
}

.ksd-divider--anchor:is(.ksd-divider--tex-leaf, .ksd-divider--tex-patina, .ksd-divider--tex-dust)::before {
  border: 0;
  background: var(--ksd-fill) center / cover no-repeat;
  filter: var(--ksd-fill-filter);
  -webkit-mask-image: radial-gradient(circle, transparent 0 4px, black 4px 5.5px, transparent 5.5px);
          mask-image: radial-gradient(circle, transparent 0 4px, black 4px 5.5px, transparent 5.5px);
}
.ksd-divider--anchor:is(.ksd-divider--tex-leaf, .ksd-divider--tex-patina, .ksd-divider--tex-dust)::after {
  background: var(--ksd-fill) center / cover no-repeat;
  filter: var(--ksd-fill-filter);
}