/* Canvas Screen Layout */
#canvasScreen {
  display: flex;
  height: calc(100vh - 53px); /* header 높이 제외 */
  padding: 0;
  margin: 0;
  max-width: none;
}

.canvas-container {
  display: grid;
  grid-template-columns: 1fr 320px;
  gap: var(--spacing-md);
  width: 100%;
  padding: var(--spacing-md);
}

/* Stage (PDF 렌더링 영역) */
.stage {
  position: relative;
  background: #0b0e12;
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  overflow: auto;
  display: flex;
  justify-content: center;
  align-items: flex-start;
  padding: var(--spacing-lg);
}

.canvas-wrapper {
  position: relative;
  display: inline-block;
}

#pdfCanvas {
  display: block;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
}

#overlayCanvas {
  position: absolute;
  left: 0;
  top: 0;
  cursor: default;
  pointer-events: all;
  z-index: 10;
}

/* Sidebar */
.sidebar {
  background: var(--panel);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

.sidebar-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--spacing-md);
  border-bottom: 1px solid var(--border-light);
}

.sidebar-header h3 {
  font-size: 13px;
  font-weight: 600;
  color: var(--text-muted);
  margin: 0;
}

.job-counter {
  font-size: 12px;
  color: var(--text-muted);
  background: var(--bg);
  padding: 2px var(--spacing-sm);
  border-radius: var(--radius-sm);
}

.job-list {
  flex: 1;
  overflow-y: auto;
  padding: var(--spacing-sm);
}

.empty-message {
  text-align: center;
  color: var(--text-muted);
  font-size: 12px;
  padding: var(--spacing-xl);
}

.sidebar-footer {
  display: flex;
  gap: var(--spacing-sm);
  padding: var(--spacing-md);
  border-top: 1px solid var(--border-light);
}

.sidebar-footer .btn {
  flex: 1;
}

.page-info {
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 12px;
  color: var(--text-muted);
  min-width: 60px;
}

/* Header Controls */
.btn-back {
  background: #2a3d5e;
  color: var(--accent);
}

.btn-back:hover {
  background: #3a4d6e;
}

#canvasControls {
  position: absolute;
  top: var(--spacing-md);
  right: var(--spacing-md);
  z-index: 20;
  background: rgba(11, 14, 18, 0.85);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  padding: var(--spacing-sm);
  backdrop-filter: blur(4px);
}

.sidebar-section {
  padding: var(--spacing-md);
  border-bottom: 1px solid var(--border-light);
  background: var(--bg);
}

.sidebar-section h4 {
  font-size: 13px;
  font-weight: 600;
  color: var(--text-normal);
  margin: 0 0 var(--spacing-sm) 0;
}

.sidebar-section ul {
  font-size: 12px;
  color: var(--text-muted);
  margin: 0;
  padding-left: var(--spacing-lg);
  line-height: 1.6;
}

.sidebar-section li {
  margin-bottom: var(--spacing-sm);
}

.feature-explanation {
  position: absolute;
  top: 80px; /* Position below canvasControls */
  right: var(--spacing-md);
  width: 300px;
  background: rgba(11, 14, 18, 0.85);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  z-index: 20;
  backdrop-filter: blur(4px);
  box-shadow: 0 4px 12px rgba(0,0,0,0.3);
}