/* ==========================================================================
   FAÇADE by Sara Bensalem - Floater Shadowbox and 3D Lighting Stylesheet
   File: css/shadowbox.css
   Specification: Milestone 1 Floater Physics and Tectonic Frame Geometry
   Strictly Zero Em Dashes (unicode 8212). Universal 0px Sharp Geometry.
   ========================================================================== */

:root {
  /* Oak Wood Palette Tokens */
  --oak-highlight: #FAE1C2;
  --oak-natural-light: #F2D7B9;
  --oak-face-color: #D6B187;
  --oak-natural-tone: #CEAA88;
  --oak-inner-bevel: #987557;
  --oak-bevel-deep: #8D6949;
  --oak-recess-trough: #250E00;

  /* Brass Accent Tokens */
  --brass-plate-start: #E6C88B;
  --brass-plate-mid: #C5A059;
  --brass-plate-end: #9B7830;
  --brass-border: #785A1D;
  --brass-text: #2A210D;

  /* Dimensions and Tectonic Clearances */
  --frame-face-width: 16px;
  --reveal-gap: 5px;
  --tableau-elevation: 14px;
  --card-aspect-ratio: 896 / 1200;

  /* Ambient Wall Drop Shadows (Resting State) */
  --shadow-gallery-resting:
    0 12px 28px -6px rgba(26, 28, 28, 0.08),
    0 24px 60px -12px rgba(26, 28, 28, 0.12);

  /* Hover Expansion Shadow */
  --shadow-gallery-hover:
    0 28px 70px -12px rgba(26, 28, 28, 0.20),
    0 40px 95px -18px rgba(26, 28, 28, 0.15);
}

/* --------------------------------------------------------------------------
   1. Viewport and 3D Perspective Container
   -------------------------------------------------------------------------- */
.shadowbox-viewport,
.artwork-frame-stage {
  position: relative;
  width: 100%;
  perspective: 1200px;
  perspective-origin: 50% 50%;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  touch-action: pan-y;
  cursor: pointer;
}

/* --------------------------------------------------------------------------
   2. Outer Oak Floater Frame Moulding
   -------------------------------------------------------------------------- */
.shadowbox-frame,
.oak-floater-frame {
  position: relative;
  width: 100%;
  max-width: 520px;
  background: linear-gradient(
    145deg,
    var(--oak-highlight) 0%,
    var(--oak-face-color) 35%,
    var(--oak-natural-tone) 70%,
    var(--oak-inner-bevel) 100%
  );
  padding: var(--frame-face-width);
  border: 1px solid rgba(141, 105, 73, 0.40);
  box-shadow: var(--ambient-shadow, var(--shadow-gallery-resting));
  transition: box-shadow 0.4s cubic-bezier(0.16, 1, 0.3, 1);
  will-change: transform, box-shadow;
  touch-action: pan-y;
  transform-style: preserve-3d;
}

/* --------------------------------------------------------------------------
   3. 3D Tilting Chassis (Preserve 3D Context)
   -------------------------------------------------------------------------- */
[data-tilt-element] {
  position: relative;
  width: 100%;
  transform-style: preserve-3d;
  transform: rotateX(var(--tilt-x, 0deg)) rotateY(var(--tilt-y, 0deg)) translateZ(0);
  transition: transform 0.05s linear;
  will-change: transform;
}

.shadowbox-chassis {
  position: relative;
  width: 100%;
  transform-style: preserve-3d;
}

/* --------------------------------------------------------------------------
   4. Reveal Trough (5mm Negative Space Recess)
   -------------------------------------------------------------------------- */
.shadowbox-trough,
.floater-trough,
.reveal-trough {
  position: relative;
  width: 100%;
  aspect-ratio: var(--card-aspect-ratio);
  background-color: var(--oak-recess-trough);
  padding: var(--reveal-gap);
  overflow: hidden;
  transform-style: preserve-3d;
  box-shadow:
    inset 0 0 10px rgba(0, 0, 0, 0.90),
    inset 2px 2px 6px rgba(37, 14, 0, 0.95),
    inset -2px -2px 6px rgba(0, 0, 0, 0.80);
  transform: translateZ(-8px);
}

/* --------------------------------------------------------------------------
   5. Suspended Floating Tableau Canvas
   -------------------------------------------------------------------------- */
.shadowbox-tableau,
.tableau-surface,
.artwork-canvas {
  position: relative;
  width: 100%;
  height: 100%;
  background-color: #111317;
  overflow: hidden;
  transform: translateZ(var(--tableau-elevation));
  box-shadow: var(
    --tableau-shadow,
    -4px -4px 14px rgba(0, 0, 0, 0.70),
    0 0 6px rgba(0, 0, 0, 0.60)
  );
  transition: box-shadow 0.1s linear;
}

/* Dual Layer Images: Pre-rendered Stacking with Smooth Cross-Fade */
.tableau-image,
.tableau-layer,
.artwork-image {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  opacity: 0;
  visibility: hidden;
  transition: 
    opacity 0.45s cubic-bezier(0.16, 1, 0.3, 1),
    transform 0.6s cubic-bezier(0.16, 1, 0.3, 1),
    visibility 0.45s ease;
  user-select: none;
  -webkit-user-drag: none;
  pointer-events: none;
  will-change: opacity, transform;
}

/* Default state: Relief active */
.tableau-image.active,
.tableau-layer.active,
.tableau-layer--relief.active,
.relief-image.active,
[data-active-view="relief"] .relief-image,
[data-active-view="relief"] .tableau-layer--relief {
  opacity: 1;
  visibility: visible;
  z-index: 2;
  transform: scale(1);
}

/* Solid swatch active state */
.solid-image.active,
.tableau-layer--solid.active,
[data-active-view="solid"] .solid-image,
[data-active-view="solid"] .tableau-layer--solid {
  opacity: 1;
  visibility: visible;
  z-index: 2;
  transform: scale(1);
}

[data-active-view="solid"] .relief-image,
[data-active-view="solid"] .tableau-layer--relief {
  opacity: 0;
  visibility: hidden;
  z-index: 1;
  transform: scale(1.02);
}

/* --------------------------------------------------------------------------
   6. Dynamic Raking Light and Spotlight Glaze
   -------------------------------------------------------------------------- */
.shadowbox-spotlight,
.raking-light-overlay,
.raking-spotlight-layer {
  position: absolute;
  inset: 0;
  z-index: 4;
  pointer-events: none;
  background: radial-gradient(
    circle 480px at var(--light-x, 50%) var(--light-y, 50%),
    rgba(255, 250, 240, 0.32) 0%,
    rgba(255, 248, 235, 0.12) 35%,
    rgba(0, 0, 0, 0.22) 100%
  );
  mix-blend-mode: soft-light;
  opacity: var(--spotlight-opacity, 0);
  transition: opacity 0.35s ease;
}

/* Directional Raking Light Grazing Gradient */
.shadowbox-raking-shadow {
  position: absolute;
  inset: 0;
  z-index: 5;
  pointer-events: none;
  background: linear-gradient(
    var(--raking-angle, 135deg),
    rgba(255, 255, 255, 0.10) 0%,
    transparent 45%,
    rgba(25, 12, 5, 0.25) 100%
  );
  mix-blend-mode: multiply;
  opacity: var(--spotlight-opacity, 0);
  transition: opacity 0.35s ease;
}

/* --------------------------------------------------------------------------
   7. Satin Architectural Brass Nameplate
   -------------------------------------------------------------------------- */
.shadowbox-brass-plate,
.satin-brass-nameplate,
.brass-nameplate {
  position: relative;
  margin-top: 12px;
  width: 100%;
  background: linear-gradient(
    135deg,
    var(--brass-plate-start) 0%,
    var(--brass-plate-mid) 50%,
    var(--brass-plate-end) 100%
  );
  border: 1px solid var(--brass-border);
  box-shadow:
    inset 1px 1px 1px rgba(255, 255, 255, 0.45),
    0 2px 5px rgba(0, 0, 0, 0.22);
  padding: 6px 14px;
  display: flex;
  flex-direction: row;
  justify-content: space-between;
  align-items: center;
  transform: translateZ(8px);
}

.nameplate-inner,
.plaque-content {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  width: 100%;
  font-family: var(--font-mono, monospace);
  font-size: 10px;
  font-weight: 600;
  letter-spacing: 0.10em;
  color: var(--brass-text);
  text-transform: uppercase;
}

.plate-divider,
.plaque-divider {
  opacity: 0.5;
  font-size: 9px;
}

.plaque-rivet {
  width: 5px;
  height: 5px;
  background: radial-gradient(circle at 30% 30%, #5E4612, #2A210D);
  box-shadow: inset 0 1px 1px rgba(255, 255, 255, 0.35);
  border-radius: 50% !important;
}

/* --------------------------------------------------------------------------
   8. Reduced Motion and Accessibility Overrides
   -------------------------------------------------------------------------- */
@media (prefers-reduced-motion: reduce) {
  .shadowbox-chassis,
  [data-tilt-element] {
    transform: none !important;
    transition: none !important;
  }
  .shadowbox-spotlight,
  .raking-light-overlay,
  .shadowbox-raking-shadow {
    opacity: 0.15 !important;
    background: radial-gradient(circle at 40% 30%, rgba(255, 250, 240, 0.2), transparent 70%) !important;
  }
}