/* ============================================================
   WALL — Canvas, frame elements, drag/drop
   ============================================================ */

/* ── Wall canvas ── */
#wall {
  position: relative;
  background: var(--color-white);
  flex-shrink: 0;
  border-radius: 4px;
  box-shadow:
    0 12px 60px rgba(0, 0, 0, 0.18),
    0 3px 12px rgba(0, 0, 0, 0.1),
    inset 0 0 0 1px rgba(0, 0, 0, 0.06);
  /* subtle wall texture */
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='300' height='300'%3E%3Cfilter id='noise'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.65' numOctaves='3' stitchTiles='stitch'/%3E%3CfeColorMatrix type='saturate' values='0'/%3E%3C/filter%3E%3Crect width='300' height='300' filter='url(%23noise)' opacity='0.02'/%3E%3C/svg%3E");
}

#gridCanvas {
  position: absolute;
  top: 0;
  left: 0;
  pointer-events: none;
  z-index: 1;
}

/* ── Reference photo background overlay ── */
.wall-ref-bg {
  position: absolute;
  inset: 0;
  overflow: hidden;
  pointer-events: none;
  z-index: 4;
  opacity: 0.3;
  transition: opacity 0.2s;
  border-radius: 4px;
}

.wall-ref-bg img {
  position: absolute;
  top: 50%;
  left: 50%;
  /* transform set via JS: translate(-50%,-50%) rotate(Xdeg) scale(Y) */
  transform: translate(-50%, -50%);
  min-width: 100%;
  min-height: 100%;
  width: auto;
  height: auto;
  object-fit: cover;
  transition: transform 0.35s cubic-bezier(0.4, 0, 0.2, 1);
}

/* ── Drop hint ── */
.drop-hint {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: var(--sp-xs);
  pointer-events: none;
  z-index: 2;
}

.drop-hint__icon {
  font-size: 40px;
  opacity: 0.18;
}

.drop-hint__text {
  font-size: 13px;
  font-family: var(--font-secondary);
  color: rgba(0,48,73,0.3);
  text-align: center;
  line-height: 1.8;
}

/* ── Guide lines (center cross) ── */
.guide-h, .guide-v {
  position: absolute;
  background: rgba(214,40,40,0.25);
  pointer-events: none;
  z-index: 3;
  display: none;
}
.guide-h { height: 1px; left: 0; right: 0; }
.guide-v { width: 1px; top: 0; bottom: 0; }
#wall.show-guides .guide-h,
#wall.show-guides .guide-v { display: block; }

/* ── Wall frames ── */
.wframe {
  position: absolute;
  z-index: 10;
  cursor: grab;
  user-select: none;
  transform-origin: center center;
}

.wframe:active { cursor: grabbing; }

/* Frame mat (inner area for image) */
.wframe__mat {
  position: absolute;
  overflow: hidden;
  pointer-events: none;
}

.wframe__mat img,
.wframe__mat .wframe__ph {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.wframe__ph {
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 11px;
  font-family: var(--font-secondary);
  color: rgba(0,48,73,0.3);
  text-align: center;
  padding: var(--sp-xs);
  background: var(--surface-panel);
}

/* Frame border element (renders the physical frame) */
.wframe__border {
  position: absolute;
  inset: 0;
  pointer-events: none;
  box-shadow: 2px 6px 28px rgba(0,0,0,0.22), 0 1px 4px rgba(0,0,0,0.1);
}

/* Frame wire/hook suggestion (thin top line) */
.wframe::before {
  content: '';
  position: absolute;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 2px;
  height: 8px;
  background: rgba(0,48,73,0.3);
  border-radius: 1px;
  opacity: 0;
  transition: opacity var(--transition-fast);
}

.wframe:hover::before { opacity: 1; }

/* Selected state */
.wframe.selected .wframe__border {
  box-shadow:
    0 0 0 2px var(--color-crimson),
    2px 6px 28px rgba(0,0,0,0.22);
}

/* Resize handles — four corners */
.wframe__rh {
  position: absolute;
  width: 10px;
  height: 10px;
  background: var(--color-crimson);
  border-radius: 50%;
  z-index: 20;
  display: none;
  box-shadow: 0 1px 4px rgba(214,40,40,0.4);
}

.wframe.selected .wframe__rh { display: block; }

.wframe__rh--nw { top: -5px;    left: -5px;  cursor: nw-resize; }
.wframe__rh--ne { top: -5px;    right: -5px; cursor: ne-resize; }
.wframe__rh--sw { bottom: -5px; left: -5px;  cursor: sw-resize; }
.wframe__rh--se { bottom: -5px; right: -5px; cursor: se-resize; }

/* Rotate handle */
.wframe__rot-handle {
  position: absolute;
  top: -18px;
  left: 50%;
  transform: translateX(-50%);
  width: 14px;
  height: 14px;
  background: white;
  border: 1.5px solid var(--color-crimson);
  border-radius: 50%;
  cursor: grab;
  z-index: 20;
  display: none;
  box-shadow: var(--shadow-card);
}

.wframe.selected .wframe__rot-handle { display: block; }

/* Label overlay */
.wframe__label {
  position: absolute;
  bottom: -22px;
  left: 50%;
  transform: translateX(-50%);
  background: rgba(0,48,73,0.8);
  color: white;
  font-size: 10px;
  font-family: var(--font-secondary);
  padding: 2px 8px;
  border-radius: var(--radius-pill);
  white-space: nowrap;
  display: none;
  pointer-events: none;
}

.wframe.selected .wframe__label { display: block; }

/* ── Dragging visual state ── */
.wframe.dragging {
  opacity: 0.9;
  box-shadow: 0 16px 48px rgba(0,0,0,0.25);
  z-index: 100;
}

/* ── Slot placeholder (from layout templates) ── */
.wframe.slot-placeholder .wframe__border {
  background: var(--surface-panel);
  border: 2px dashed rgba(0,48,73,0.14);
  box-shadow: none;
}

.wframe.slot-placeholder .wframe__ph {
  background: transparent;
  color: rgba(0,48,73,0.25);
  font-size: 12px;
}

/* ── Drop target highlight (when dragging from library) ── */
#wall.drop-active {
  box-shadow:
    0 12px 60px rgba(0, 0, 0, 0.18),
    0 0 0 3px rgba(214,40,40,0.35);
}

/* ══════════════════════════════════════════
   WALL SIZE & LABEL
   ══════════════════════════════════════════ */
.wall-wrapper {
  position: relative;
  display: inline-block;
}

.wall-size-label {
  position: absolute;
  bottom: -28px;
  left: 50%;
  transform: translateX(-50%);
  font-size: 11px;
  font-family: var(--font-secondary);
  color: rgba(0,48,73,0.35);
  white-space: nowrap;
}

/* ══════════════════════════════════════════
   REFERENCE PHOTO TAGGING CANVAS
   ══════════════════════════════════════════ */
#refCanvas {
  display: block;
  cursor: crosshair;
  border-radius: 8px;
  max-width: 100%;
  max-height: 340px;
  object-fit: contain;
}

.ref-tag-box {
  position: absolute;
  border: 2px solid var(--color-orange);
  border-radius: 4px;
  pointer-events: none;
  display: flex;
  align-items: flex-start;
  justify-content: flex-start;
}

.ref-tag-num {
  background: var(--color-orange);
  color: white;
  font-size: 10px;
  font-weight: 600;
  padding: 2px 5px;
  line-height: 1.2;
}

/* ── Reference overlay resize handles ── */
.wall-ref-handles {
  position: absolute;
  inset: 0;
  pointer-events: none;
  z-index: 5;
}

.wall-ref-handle {
  position: absolute;
  width: 14px;
  height: 14px;
  background: #fff;
  border: 2px solid var(--color-orange, #e87040);
  border-radius: 50%;
  pointer-events: all;
  cursor: nwse-resize;
  transition: transform 0.15s, background 0.15s;
  box-shadow: 0 1px 4px rgba(0,0,0,0.25);
}

.wall-ref-handle:hover {
  background: var(--color-orange, #e87040);
  transform: scale(1.3);
}

.wall-ref-handle--tl { top: -7px;    left: -7px;    cursor: nwse-resize; }
.wall-ref-handle--tr { top: -7px;    right: -7px;   cursor: nesw-resize; }
.wall-ref-handle--bl { bottom: -7px; left: -7px;    cursor: nesw-resize; }
.wall-ref-handle--br { bottom: -7px; right: -7px;   cursor: nwse-resize; }