/* Paper 3D objects — illustration_only kit. Not PaintVM. */
.paper-obj {
  --obj-tilt: 0deg;
  --obj-z: 0px;
  position: relative;
  display: block;
  width: 100%;
  margin: 0;
  padding: 0;
  border: 0;
  background: transparent;
  cursor: pointer;
  text-align: left;
  color: inherit;
  font: inherit;
  transform-style: preserve-3d;
  transform: perspective(900px) rotateX(var(--obj-tilt)) translateZ(var(--obj-z));
  transition: transform 0.45s cubic-bezier(0.22, 1, 0.36, 1), filter 0.6s ease;
}
.paper-obj:focus-visible { outline: 2px solid var(--tide); outline-offset: 4px; }
.paper-obj__frame {
  background: var(--paper);
  padding: 0.4rem;
  border-radius: 3px;
  border: 1px solid rgba(40, 30, 20, 0.12);
  box-shadow:
    0 1px 0 rgba(255, 255, 255, 0.4) inset,
    0 8px 0 rgba(20, 12, 8, 0.18),
    0 22px 36px rgba(0, 0, 0, 0.35);
  overflow: hidden;
  position: relative;
}
.paper-obj__frame img,
.paper-obj__frame svg,
.paper-obj__frame object {
  display: block;
  width: 100%;
  height: auto;
  filter: grayscale(1) contrast(1.08) sepia(0.12);
  transition: filter 0.7s ease, opacity 0.7s ease;
}
.paper-obj__caption {
  display: block;
  margin-top: 0.4rem;
  font-size: 0.62rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--mute);
}
.paper-obj:hover,
.paper-obj:focus-visible {
  --obj-tilt: -8deg;
  --obj-z: 28px;
}
.paper-obj:hover .paper-obj__frame,
.paper-obj:focus-visible .paper-obj__frame {
  box-shadow:
    0 1px 0 rgba(255, 255, 255, 0.5) inset,
    0 14px 0 rgba(20, 12, 8, 0.16),
    0 36px 48px rgba(30, 200, 255, 0.14);
}
.paper-obj.is-picked {
  --obj-tilt: -10deg;
  --obj-z: 42px;
}
.paper-obj.is-picked .paper-obj__caption { color: var(--gold); }

/* graphite → watercolor → glass-phosphor */
[data-phase="color"] .paper-obj__frame img,
[data-phase="color"] .paper-obj__frame svg,
.paper-obj[data-phase="color"] .paper-obj__frame img {
  filter: grayscale(0.25) saturate(1.15) contrast(1.04);
}
[data-phase="glass"] .paper-obj__frame img,
[data-phase="glass"] .paper-obj__frame svg,
.paper-obj[data-phase="glass"] .paper-obj__frame img {
  filter: grayscale(0.05) saturate(1.25) contrast(1.08) brightness(1.04);
}
[data-phase="glass"] .paper-obj__frame::after,
.paper-obj[data-phase="glass"] .paper-obj__frame::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  box-shadow: inset 0 0 0 1px rgba(30, 200, 255, 0.45), inset 0 0 28px rgba(184, 243, 255, 0.18);
  mix-blend-mode: screen;
}

/* Hero diorama — pickable sheets peel off the stage */
.diorama-stage .paper-obj--sheet {
  position: absolute;
  width: 58%;
  pointer-events: auto;
}
.diorama-stage .paper-obj--sheet .paper-obj__frame img {
  height: 48vh;
  object-fit: cover;
  object-position: center top;
}
.diorama-stage .paper-obj__caption {
  color: var(--foam);
  text-shadow: 0 1px 6px #000;
}
.diorama-stage .sheet-a { left: 8%; top: 10%; z-index: 3; }
.diorama-stage .sheet-b { left: 22%; top: 22%; z-index: 4; }
.diorama-stage .sheet-c { left: 34%; top: 34%; z-index: 5; }
.diorama-stage .sheet-a { transform: perspective(900px) rotateZ(-4deg) rotateX(calc(var(--obj-tilt) - var(--separation) * 4deg)) translateZ(calc(var(--obj-z) + var(--separation) * 18px)); }
.diorama-stage .sheet-b { transform: perspective(900px) rotateZ(2deg) rotateX(calc(var(--obj-tilt) - var(--separation) * 7deg)) translateZ(calc(var(--obj-z) + var(--separation) * 36px)); }
.diorama-stage .sheet-c { transform: perspective(900px) rotateZ(6deg) rotateX(calc(var(--obj-tilt) - var(--separation) * 10deg)) translateZ(calc(var(--obj-z) + var(--separation) * 54px)); }

/* Mentat desk */
.desk {
  position: relative;
  margin: 1.5rem 0 2rem;
  padding: 1.4rem 1.2rem 2rem;
  min-height: 28rem;
  background:
    radial-gradient(ellipse at 50% 0%, rgba(184, 243, 255, 0.06), transparent 55%),
    linear-gradient(180deg, #2a1c12 0%, #1a120c 40%, #120c08 100%);
  border: 1px solid rgba(240, 195, 106, 0.18);
  border-radius: 6px;
  box-shadow: inset 0 0 80px rgba(0, 0, 0, 0.45);
  perspective: 1400px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.1rem 1.2rem;
}
.desk .paper-obj--wide { grid-column: 1 / -1; max-width: 28rem; justify-self: center; }
.desk-label {
  grid-column: 1 / -1;
  font-size: 0.62rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--gold);
  text-align: center;
}

/* Cabinet of plates */
.cabinet {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 1.1rem;
  perspective: 1600px;
  margin: 1.4rem 0 2rem;
}
.plate {
  background: var(--paper);
  padding: 0.45rem;
  border-radius: 3px;
  border: 1px solid rgba(40, 30, 20, 0.12);
  cursor: pointer;
  transform: rotateX(0deg) translateZ(0);
  transition: transform 0.5s cubic-bezier(0.22, 1, 0.36, 1), box-shadow 0.4s ease;
  box-shadow: 0 10px 24px rgba(0, 0, 0, 0.35);
}
.plate img, .plate object, .plate svg {
  display: block; width: 100%; height: 9.5rem; object-fit: cover; background: #efe8dc;
}
.plate figcaption {
  margin-top: 0.4rem;
  font-size: 0.62rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: #5a4636;
}
.plate:hover, .plate:focus-visible {
  transform: translateY(-8px) rotateX(-7deg) translateZ(24px);
  box-shadow: 0 24px 40px rgba(30, 200, 255, 0.16);
}
.plate.is-drawn {
  transform: translateY(-12px) rotateX(-9deg) translateZ(40px);
  box-shadow: 0 0 0 1px rgba(30, 200, 255, 0.4), 0 28px 48px rgba(0, 0, 0, 0.4);
}
.plate-detail {
  margin-top: 0.8rem;
  padding: 0.9rem 1rem;
  border: 1px dashed var(--border);
  border-radius: 8px;
  background: var(--panel);
  font-size: 0.85rem;
  color: var(--mute);
}
.phase-chip {
  display: inline-block;
  margin-left: 0.4rem;
  font-size: 0.6rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--gold);
  border: 1px solid var(--border);
  padding: 0.1rem 0.4rem;
  border-radius: 99px;
}

@media (max-width: 720px) {
  .desk { grid-template-columns: 1fr; min-height: 0; }
  .diorama-stage .paper-obj--sheet { width: 78%; }
  .diorama-stage .sheet-b { left: 14%; }
  .diorama-stage .sheet-c { left: 20%; }
}
@media (prefers-reduced-motion: reduce) {
  .paper-obj, .plate { transition: none; transform: none; }
  .paper-obj__frame img { filter: none; }
}