/* Grid Protocol — image effects
   - Tone filters (B/W, navy, amber, etc.)
   - Paper Shaders halftone wrappers
*/

.gp-img-ink {
  mix-blend-mode: multiply;
}

.gp-img-pop {
  filter: contrast(1.18) saturate(0.9) brightness(0.96);
}

.gp-img-tone-bw {
  filter: grayscale(1) contrast(1.58) brightness(0.88);
}

.gp-img-tone-navy {
  filter: grayscale(1) sepia(1) hue-rotate(205deg) saturate(4) contrast(1.55) brightness(0.82);
}

.gp-img-tone-steel {
  filter: grayscale(1) sepia(0.6) hue-rotate(205deg) saturate(2.2) contrast(1.45) brightness(0.86);
}

.gp-img-tone-olive {
  filter: grayscale(1) sepia(1) hue-rotate(85deg) saturate(2.2) contrast(1.5) brightness(0.84);
}

.gp-img-tone-amber {
  filter: grayscale(1) sepia(1) hue-rotate(25deg) saturate(2.4) contrast(1.55) brightness(0.85);
}

.gp-halftone {
  position: relative;
  overflow: hidden;
  isolation: isolate;
  background: #fff;
}

.gp-halftone > p,
.gp-halftone > figure,
.gp-halftone > div {
  margin: 0;
  width: 100%;
  height: 100%;
}

.gp-halftone .gp-frame-img {
  display: block;
  position: relative;
  z-index: 1;
  width: 100%;
  height: auto;
  object-fit: cover;
  object-position: center;
  transition: opacity 120ms ease;
}

/* Keep base image visible as a fallback; shader canvas overlays it when ready. */
.gp-halftone.gp-halftone--ready .gp-frame-img {
  opacity: 1;
}

/* Paper Shaders injects a canvas with z-index:-1 by default.
   We bring it forward so the shader output becomes the visible image layer. */
.gp-halftone[data-paper-shader] > canvas {
  z-index: 2 !important;
  pointer-events: none;
}

.gp-halftone.gp-halftone--error {
  outline: 2px dashed rgba(180, 30, 30, 0.45);
  outline-offset: -2px;
}