/* ═══════════════════════════════════════════════════════════════
   DocuMentor v4 — css/workspace.css
   Canvas workspace, zoom bar, drop zone, page indicator & page strips
   ═══════════════════════════════════════════════════════════════ */

/* ─── Desktop Page Strip ─────────────────────────────────────── */
#page-strip {
  width: var(--strip-w);
  background: var(--bg1);
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  overflow: hidden;
  flex-shrink: 0;
}

#page-list {
  flex: 1;
  overflow-y: auto;
  padding: 8px 6px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.page-thumb {
  position: relative;
  border-radius: var(--r1);
  overflow: hidden;
  border: 2px solid transparent;
  cursor: pointer;
  transition: var(--transition);
  background: var(--bg3);
  aspect-ratio: 3/4;
}
.page-thumb:hover { border-color: var(--border2); }
.page-thumb.active { border-color: var(--accent); }
.page-thumb canvas { width: 100%; height: 100%; object-fit: cover; display: block; }
.page-thumb-num {
  position: absolute;
  bottom: 4px;
  right: 5px;
  background: rgba(0,0,0,0.6);
  color: white;
  font-size: 9px;
  font-weight: 700;
  padding: 1px 4px;
  border-radius: 3px;
}
.page-thumb-del {
  position: absolute;
  top: 3px;
  right: 3px;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: rgba(0,0,0,0.65);
  color: white;
  font-size: 10px;
  display: none;
  align-items: center;
  justify-content: center;
}
.page-thumb:hover .page-thumb-del { display: flex; }

.add-page-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 4px;
  padding: 10px;
  color: var(--text1);
  font-size: 11px;
  font-weight: 600;
  border-top: 1px solid var(--border);
  transition: var(--transition);
  flex-shrink: 0;
}
.add-page-btn:hover { color: var(--accent); background: var(--accent-dim); }

/* ─── Main Content Canvas Area ──────────────────────────────── */
#main-content {
  flex: 1;
  background: var(--bg2);
  position: relative;
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
}

/* Drop Zone */
#drop-zone {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 32px;
  gap: 12px;
  transition: var(--transition);
}

.drop-blob {
  position: absolute;
  width: 400px;
  height: 400px;
  background: radial-gradient(circle, var(--accent-dim) 0%, transparent 70%);
  pointer-events: none;
  border-radius: 50%;
  animation: blobPulse 4s ease-in-out infinite;
}

@keyframes blobPulse {
  0%, 100% { transform: scale(1); opacity: 0.6; }
  50% { transform: scale(1.1); opacity: 1; }
}

.drop-icon-wrap {
  width: 80px;
  height: 80px;
  border-radius: 50%;
  background: var(--bg3);
  border: 2px dashed var(--border2);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text2);
  position: relative;
  z-index: 1;
  transition: var(--transition);
}

#drop-zone.drag-over .drop-icon-wrap {
  border-color: var(--accent);
  color: var(--accent);
  background: var(--accent-dim);
}

#drop-zone h2 {
  font-size: 18px;
  font-weight: 600;
  color: var(--text0);
  position: relative;
  z-index: 1;
}
#drop-zone p {
  font-size: 12px;
  color: var(--text1);
  position: relative;
  z-index: 1;
}

.drop-actions {
  display: flex;
  gap: 10px;
  margin-top: 8px;
  position: relative;
  z-index: 1;
  flex-wrap: wrap;
  justify-content: center;
}

/* Canvas Workspace */
#canvas-workspace {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
}

#zoom-bar {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 6px 12px;
  background: var(--bg1);
  border-bottom: 1px solid var(--border);
  flex-shrink: 0;
}

#zoom-level {
  font-size: 12px;
  font-weight: 600;
  color: var(--text1);
  min-width: 40px;
  text-align: center;
}

#canvas-scroll {
  flex: 1;
  overflow: auto;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
  cursor: grab;
  position: relative;
}
#canvas-scroll:active { cursor: grabbing; }

#canvas-container {
  position: relative;
  display: inline-flex;
  line-height: 0;
  flex-shrink: 0;
}

#main-canvas {
  display: block;
  box-shadow: 0 4px 40px rgba(0,0,0,0.5);
  background: #fff;
  image-rendering: high-quality;
  max-width: none;
  max-height: none;
}

#page-indicator {
  position: absolute;
  bottom: 16px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  align-items: center;
  gap: 10px;
  background: var(--bg1);
  border: 1px solid var(--border2);
  padding: 4px 12px;
  border-radius: 20px;
  box-shadow: var(--shadow-sm);
  z-index: 15;
  font-size: 12px;
  color: var(--text1);
  transition: left 0.25s cubic-bezier(0.4, 0, 0.2, 1), transform 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}

@media (min-width: 769px) {
  #page-indicator.crop-mode-active {
    left: calc(50% - 135px);
  }
}