/* ====================================================================
   PDF Builder Editor - Main Styles
   ==================================================================== */

:root {
  --primary-color: #0066cc;
  --secondary-color: #f0f0f0;
  --border-color: #ddd;
  --text-color: #333;
  --header-height: 60px;
  --sidebar-width: 280px;
  --properties-width: 320px;
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  padding: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Helvetica Neue",
    sans-serif;
}

/* ====================================================================
   Editor Layout
   ==================================================================== */

.pdfb-pdf-builder-editor {
  display: flex;
  flex-direction: column;
  height: 100vh;
  background: #fafafa;
}

.pdfb-pdf-builder-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: var(--header-height);
  padding: 0 20px;
  background: white;
  border-bottom: 1px solid var(--border-color);
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.05);
  z-index: 100;
}

.pdfb-header-left {
  flex: 1;
  display: flex;
  align-items: center;
}

.pdfb-header-title {
  margin: 0;
  font-size: 20px;
  font-weight: 600;
  color: var(--text-color);
}

.pdfb-header-center {
  flex: 1;
  display: flex;
  justify-content: center;
}

.pdfb-zoom-controls {
  display: flex;
  align-items: center;
  gap: 10px;
  background: var(--secondary-color);
  padding: 6px 12px;
  border-radius: 4px;
}

.pdfb-zoom-btn {
  background: white;
  border: 1px solid var(--border-color);
  padding: 6px 10px;
  border-radius: 3px;
  cursor: pointer;
  font-size: 13px;
  transition: all 0.2s;
}

.pdfb-zoom-btn:hover {
  background: var(--primary-color);
  color: white;
  border-color: var(--primary-color);
}

.pdfb-zoom-value {
  font-size: 13px;
  font-weight: 600;
  color: var(--text-color);
  min-width: 50px;
  text-align: center;
}

.pdfb-header-right {
  flex: 1;
  display: flex;
  justify-content: flex-end;
  gap: 10px;
}

.pdfb-btn-save,
.pdfb-btn-preview {
  background: white;
  border: 1px solid var(--border-color);
  padding: 8px 16px;
  border-radius: 4px;
  cursor: pointer;
  font-size: 13px;
  font-weight: 500;
  transition: all 0.2s;
}

.pdfb-btn-save:hover {
  background: #e8f0ff;
  border-color: var(--primary-color);
  color: var(--primary-color);
}

.pdfb-btn-preview:hover {
  background: #f0f0f0;
  border-color: #999;
}

/* ====================================================================
   Editor Body
   ==================================================================== */

.pdfb-pdf-builder-body {
  display: flex;
  flex: 1;
  overflow: hidden;
}

.pdfb-pdf-builder-main {
  display: flex;
  flex-direction: column;
  flex: 1;
  overflow: hidden;
}

/* ====================================================================
   Element Library (Left Sidebar)
   ==================================================================== */

.pdfb-element-library {
  width: var(--sidebar-width);
  background: white;
  border-right: 1px solid var(--border-color);
  overflow-y: auto;
  display: flex;
  flex-direction: column;
}

.pdfb-library-header {
  padding: 15px;
  border-bottom: 1px solid var(--border-color);
  font-weight: 600;
  font-size: 13px;
}

.pdfb-library-search {
  width: 100%;
  padding: 8px;
  margin: 10px;
  border: 1px solid var(--border-color);
  border-radius: 3px;
  font-size: 12px;
}

.pdfb-library-categories {
  flex: 1;
  overflow-y: auto;
}

.pdfb-library-category {
  border-bottom: 1px solid var(--border-color);
}

.pdfb-category-title {
  padding: 10px 15px;
  background: #f5f5f5;
  font-weight: 500;
  font-size: 12px;
  cursor: pointer;
  user-select: none;
}

.pdfb-category-title:hover {
  background: #efefef;
}

.pdfb-category-items {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
  padding: 10px;
}

.pdfb-element-item {
  background: #f9f9f9;
  border: 1px solid var(--border-color);
  padding: 10px;
  text-align: center;
  cursor: grab;
  border-radius: 3px;
  font-size: 11px;
  transition: all 0.2s;
}

.pdfb-element-item:hover {
  background: #f0f7ff;
  border-color: var(--primary-color);
  box-shadow: 0 2px 4px rgba(0, 102, 204, 0.1);
}

.pdfb-element-item.dragging {
  opacity: 0.5;
}

/* ====================================================================
   Toolbar
   ==================================================================== */

.pdfb-pdf-builder-toolbar {
  height: 50px;
  background: white;
  border-bottom: 1px solid var(--border-color);
  padding: 0 20px;
  display: flex;
  align-items: center;
  gap: 10px;
  overflow-x: auto;
}

.pdfb-toolbar-group {
  display: flex;
  align-items: center;
  gap: 5px;
  padding: 0 10px;
  border-right: 1px solid var(--border-color);
}

.pdfb-toolbar-group:last-child {
  border-right: none;
}

.pdfb-toolbar-btn {
  background: white;
  border: 1px solid var(--border-color);
  padding: 6px 12px;
  border-radius: 3px;
  cursor: pointer;
  font-size: 12px;
  transition: all 0.2s;
}

.pdfb-toolbar-btn:hover {
  background: var(--secondary-color);
}

.pdfb-toolbar-btn.active {
  background: var(--primary-color);
  color: white;
  border-color: var(--primary-color);
}

/* ====================================================================
   Canvas Area
   ==================================================================== */

.pdfb-pdf-canvas-wrapper {
  flex: 1;
  overflow: auto;
  background: #efefef;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
}

.pdfb-pdf-canvas-container {
  background: white;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
  border-radius: 2px;
  overflow: hidden;
}

.pdfb-pdf-canvas {
  width: 210mm;
  min-height: 297mm;
  background: white;
  position: relative;
}

.pdfb-canvas-page {
  width: 100%;
  height: 100%;
  position: relative;
  overflow: hidden;
}

.pdfb-canvas-content {
  width: 100%;
  height: 100%;
  padding: 20px;
  position: relative;
}

.pdfb-canvas-empty {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  height: 100%;
  color: #999;
  font-size: 14px;
  text-align: center;
}

.pdfb-canvas-element {
  position: absolute;
  border: 1px dashed var(--border-color);
  padding: 4px;
  cursor: move;
  transition: all 0.1s;
}

.pdfb-canvas-element.selected {
  border: 2px solid var(--primary-color);
  background: rgba(0, 102, 204, 0.05);
}

.pdfb-canvas-element:hover {
  border-color: var(--primary-color);
}

/* ====================================================================
   Properties Panel (Right Sidebar)
   ==================================================================== */

.pdfb-properties-panel {
  width: var(--properties-width);
  background: white;
  border-left: 1px solid var(--border-color);
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

.pdfb-panel-header {
  padding: 15px;
  border-bottom: 1px solid var(--border-color);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.pdfb-panel-title {
  font-weight: 600;
  font-size: 13px;
}

.pdfb-panel-close {
  background: none;
  border: none;
  cursor: pointer;
  font-size: 18px;
  color: #999;
}

.pdfb-panel-close:hover {
  color: var(--text-color);
}

.pdfb-panel-content {
  flex: 1;
  overflow-y: auto;
  padding: 15px;
}

.pdfb-property-group {
  margin-bottom: 20px;
}

.pdfb-property-label {
  display: block;
  font-size: 12px;
  font-weight: 500;
  margin-bottom: 6px;
  color: var(--text-color);
}

.pdfb-property-input,
.pdfb-property-select,
.pdfb-property-textarea {
  width: 100%;
  padding: 8px;
  border: 1px solid var(--border-color);
  border-radius: 3px;
  font-size: 12px;
  font-family: inherit;
}

.pdfb-property-input:focus,
.pdfb-property-select:focus,
.pdfb-property-textarea:focus {
  outline: none;
  border-color: var(--primary-color);
  box-shadow: 0 0 0 2px rgba(0, 102, 204, 0.1);
}

/* ====================================================================
   Loading State
   ==================================================================== */

.pdfb-pdf-builder-loading {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  height: 100vh;
  background: white;
  gap: 20px;
}

.pdfb-spinner {
  width: 40px;
  height: 40px;
  border: 3px solid var(--secondary-color);
  border-top-color: var(--primary-color);
  border-radius: 50%;
  animation: spin 1s linear infinite;
}

@keyframes spin {
  to {
    transform: rotate(360deg);
  }
}

/* ====================================================================
   Responsive
   ==================================================================== */

@media (max-width: 1200px) {
  :root {
    --sidebar-width: 250px;
    --properties-width: 280px;
  }
}

@media (max-width: 768px) {
  .pdfb-pdf-builder-header {
    flex-wrap: wrap;
    height: auto;
    padding: 10px;
  }

  .pdfb-header-left,
  .pdfb-header-center,
  .pdfb-header-right {
    flex: 1 100%;
  }

  .pdfb-pdf-builder-body {
    flex-direction: column;
  }

  .pdfb-element-library,
  .pdfb-properties-panel {
    width: 100%;
    max-height: 200px;
  }
}