/* ==========================================================================
   Workspace Quick Actions Toolbar (Floating at Top of Viewport)
   ========================================================================== */
.canvas-quick-toolbar {
  position: absolute;
  top: var(--space-4);
  left: 50%;
  transform: translateX(-50%);
  background: var(--color-surface);
  border: 2px solid var(--color-divider);
  box-shadow: var(--shadow-md);
  display: flex;
  align-items: center;
  gap: 1px;
  z-index: 50;
  padding: 2px;
}

.toolbar-tool-btn {
  background: transparent;
  border: none;
  color: var(--color-text);
  padding: 6px 12px;
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 11px;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.toolbar-tool-btn:hover {
  background: var(--color-surface-hover);
  color: var(--color-accent);
}

.toolbar-tool-btn.active {
  background: var(--color-accent);
  color: #fff;
}

.toolbar-sep {
  width: 1px;
  height: 20px;
  background: var(--color-divider);
  margin: 0 4px;
}

/* ==========================================================================
   The Scaled Preview Frame & Canvas Stack
   ========================================================================== */
.preview-frame {
  position: relative;
  box-shadow: var(--shadow-lg), 0 0 0 2px var(--color-divider);
  background-color: #0b0f19;
  transform-origin: center center;
  transition: transform 0.1s ease-out;
  overflow: hidden;
}

/* Checkerboard Grid Pattern */
.checkerboard {
  background-color: var(--checker-2) !important;
  background-image: 
    linear-gradient(45deg, var(--checker-1) 25%, transparent 25%), 
    linear-gradient(-45deg, var(--checker-1) 25%, transparent 25%), 
    linear-gradient(45deg, transparent 75%, var(--checker-1) 75%), 
    linear-gradient(-45deg, transparent 75%, var(--checker-1) 75%);
  background-size: 24px 24px;
  background-position: 0 0, 0 12px, 12px -12px, -12px 0px;
}

.preview-canvas-wrapper {
  position: absolute;
  inset: 0;
  overflow: hidden;
}

/* Background image element */
.preview-bg-image {
  position: absolute;
  left: 50%;
  top: 50%;
  width: 100%;
  height: 100%;
  object-fit: cover;
  transform: translate(-50%, -50%) translate(calc(var(--bg-offset-x) * 1%), calc(var(--bg-offset-y) * 1%)) scale(var(--bg-zoom));
  transform-origin: center center;
  opacity: 0;
  pointer-events: none;
  user-select: none;
}

.preview-bg-image.loaded {
  opacity: 1;
}

/* Tint overlay */
.preview-tint {
  position: absolute;
  inset: 0;
  background-color: var(--tint-color);
  opacity: var(--tint-opacity);
  pointer-events: none;
}

/* Snap Guides (Magnetic Center Crosshairs) */
.snap-guide {
  position: absolute;
  pointer-events: none;
  z-index: 40;
  display: none;
}
.snap-guide-x {
  top: 0;
  bottom: 0;
  left: 50%;
  width: 1px;
  border-left: 2px dashed var(--color-accent);
}
.snap-guide-y {
  left: 0;
  right: 0;
  top: 50%;
  height: 1px;
  border-top: 2px dashed var(--color-accent);
}

/* Layers Container */
.preview-text-container {
  position: absolute;
  inset: 0;
  pointer-events: all;
}

/* Draggable On-Canvas Layer Box */
.preview-text-box {
  position: absolute;
  max-width: 85%;
  box-sizing: border-box;
  white-space: pre-wrap;
  word-break: break-word;
  cursor: grab;
  touch-action: none;
  user-select: none;
  pointer-events: auto;
}

.preview-text-box:hover {
  outline: 1px dashed var(--color-accent);
  outline-offset: 4px;
}

.preview-text-box.dragging {
  cursor: grabbing !important;
  opacity: 0.92;
}

/* Active Layer Frame (Modernist Selection Box) */
.preview-text-box.active-layer {
  outline: 2px solid var(--color-accent) !important;
  outline-offset: 4px;
  box-shadow: 0 0 0 1px #fff;
}

.preview-text-box.has-handles {
  outline-offset: 0px !important;
  max-width: none;
  white-space: normal;
}

/* Corner handles on active text layer (decorative) */
.preview-text-box.active-layer:not(.has-handles)::after {
  content: "";
  position: absolute;
  top: -8px;
  right: -8px;
  width: 8px;
  height: 8px;
  background: var(--color-accent);
  border: 1px solid #fff;
}

.preview-text-box.active-layer:not(.has-handles)::before {
  content: "";
  position: absolute;
  bottom: -8px;
  left: -8px;
  width: 8px;
  height: 8px;
  background: var(--color-accent);
  border: 1px solid #fff;
}

/* On-Canvas Corner Resize Handles */
.resize-handle {
  width: 8px;
  height: 8px;
  background: #ffffff;
  border: 1.5px solid var(--color-accent);
  border-radius: 0px;
  position: absolute;
  z-index: 50;
  touch-action: none;
  box-sizing: border-box;
  pointer-events: auto;
}
.resize-handle:hover {
  background: var(--color-accent);
}
.resize-nw {
  top: -5px;
  left: -5px;
  cursor: nwse-resize;
}
.resize-ne {
  top: -5px;
  right: -5px;
  cursor: nesw-resize;
}
.resize-se {
  bottom: -5px;
  right: -5px;
  cursor: nwse-resize;
}
.resize-sw {
  bottom: -5px;
  left: -5px;
  cursor: nesw-resize;
}

/* Rotation Stalk & Handle */
.rotation-stalk {
  position: absolute;
  top: -24px;
  left: 50%;
  width: 1.5px;
  height: 24px;
  background: var(--color-accent);
  transform: translateX(-50%);
  pointer-events: none;
  z-index: 48;
}
.rotation-handle {
  position: absolute;
  top: -34px;
  left: 50%;
  transform: translateX(-50%);
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--color-accent);
  border: 2px solid #ffffff;
  box-shadow: 0 1px 4px rgba(0, 0, 0, 0.3);
  cursor: grab;
  z-index: 52;
  touch-action: none;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #ffffff;
  padding: 0;
  box-sizing: border-box;
  transition: transform 0.1s ease;
  pointer-events: auto;
}
.rotation-handle:hover,
.rotation-handle.rotating {
  cursor: grabbing !important;
  transform: translateX(-50%) scale(1.15);
}
.rotation-handle svg {
  width: 10px;
  height: 10px;
  pointer-events: none;
}

/* On-Canvas Coordinates Badge HUD */
.coords-hud {
  position: absolute;
  top: -24px;
  left: 0;
  background: var(--color-text);
  color: var(--color-bg);
  font-family: var(--font-heading);
  font-size: 10px;
  font-weight: 700;
  font-variant-numeric: tabular-nums;
  letter-spacing: 0.06em;
  padding: 1px 6px;
  pointer-events: none;
  white-space: nowrap;
  z-index: 45;
  display: none;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.3);
}
.preview-text-box.has-handles .coords-hud {
  top: auto;
  bottom: -26px;
  left: 50%;
  transform: translateX(-50%);
}
.preview-text-box.active-layer .coords-hud {
  display: block;
}

/* ==========================================================================
   Full Window Drag-and-Drop Ingestion Overlay
   ========================================================================== */
.global-drag-overlay {
  position: fixed;
  inset: 0;
  background: color-mix(in srgb, var(--color-bg) 85%, transparent);
  backdrop-filter: blur(4px);
  z-index: 9999;
  display: none;
  place-items: center;
  border: 6px dashed var(--color-accent);
  pointer-events: none;
}

.global-drag-overlay.active {
  display: grid;
}

.drag-overlay-card {
  background: var(--color-surface);
  border: 2px solid var(--color-text);
  padding: 32px 48px;
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 16px;
  box-shadow: var(--shadow-lg);
}

.drag-overlay-card h2 {
  font-family: var(--font-heading);
  font-size: 24px;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: -0.02em;
}

.drag-overlay-card p {
  font-size: 14px;
  max-width: 40ch;
  color: color-mix(in srgb, var(--color-text) 70%, transparent);
}

/* ==========================================================================
   Canvas User Guidelines (Horizontal & Vertical)
   ========================================================================== */
.canvas-guide {
  position: absolute;
  z-index: 42;
  pointer-events: auto;
  user-select: none;
}
.canvas-guide.guide-h {
  left: 0;
  right: 0;
  height: 9px;
  margin-top: -4px;
  cursor: row-resize;
  border-top: 1px dashed var(--color-accent);
}
.canvas-guide.guide-v {
  top: 0;
  bottom: 0;
  width: 9px;
  margin-left: -4px;
  cursor: col-resize;
  border-left: 1px dashed var(--color-accent);
}
.canvas-guide:hover,
.canvas-guide.dragging {
  border-color: #ff4d36;
  z-index: 44;
}
.canvas-guide .guide-label {
  position: absolute;
  background: var(--color-accent);
  color: #fff;
  font-size: 9px;
  font-weight: 700;
  padding: 1px 4px;
  pointer-events: none;
  opacity: 0.85;
}
.canvas-guide.guide-h .guide-label {
  left: 6px;
  top: 2px;
}
.canvas-guide.guide-v .guide-label {
  top: 6px;
  left: 2px;
}
.canvas-guide:hover .guide-label,
.canvas-guide.dragging .guide-label {
  opacity: 1;
}

/* Multi-Selected Layer State */
.preview-text-box.multi-selected {
  outline: 2px solid var(--color-accent) !important;
  outline-offset: 2px;
}