/**
 * builder.css — Phase 4 (P4-T7)
 * Wix-style builder layout, block preview styles, and device frame CSS.
 * Uses tokens from assets/css/tokens.css + ThemeEngine CSS vars
 * (--pb-primary, --pb-bg, --pb-text, --pb-accent).
 */

/* ─────────────────────────────────────────────
   BUILDER LAYOUT (3-panel)
───────────────────────────────────────────── */
.pb-builder-layout {
  display: grid;
  grid-template-columns: 220px 1fr 280px;
  height: calc(100vh - 56px); /* minus topbar */
  background: var(--color-bg-app, #F7F8FC);
}

.pb-panel-blocks,
.pb-panel-props {
  background: var(--color-surface, #fff);
  border-right: 1px solid var(--color-border, #E5E7EB);
  overflow-y: auto;
  padding: var(--space-md, 16px);
}

.pb-panel-props {
  border-right: none;
  border-left: 1px solid var(--color-border, #E5E7EB);
}

.pb-canvas-area {
  display: flex;
  flex-direction: column;
  overflow: hidden;
  min-width: 0;
}

/* ─────────────────────────────────────────────
   VIEWPORT TOOLBAR (Desktop / Tablet / Mobile)
───────────────────────────────────────────── */
.pb-viewport-toolbar {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: var(--space-sm, 8px);
  padding: var(--space-sm, 8px);
  background: var(--color-surface, #fff);
  border-bottom: 1px solid var(--color-border, #E5E7EB);
}

.pb-viewport-btn {
  padding: 6px 14px;
  border: 1px solid var(--color-border, #E5E7EB);
  background: var(--color-bg-app, #F7F8FC);
  border-radius: var(--radius-md, 8px);
  font-size: 13px;
  cursor: pointer;
  transition: background .15s, border-color .15s;
}

.pb-viewport-btn:hover {
  background: var(--color-primary-soft, #EDE9FF);
}

.pb-viewport-btn.active {
  background: var(--color-primary, #6C47FF);
  color: var(--color-text-inverse, #fff);
  border-color: var(--color-primary, #6C47FF);
}

/* ─────────────────────────────────────────────
   CANVAS + PREVIEW IFRAME
───────────────────────────────────────────── */
.pb-canvas-scroll {
  flex: 1;
  overflow-y: auto;
  padding: var(--space-lg, 24px);
  display: flex;
  justify-content: center;
}

#builder-canvas {
  width: 100%;
  max-width: 1280px;
  background: var(--pb-bg, #ffffff);
  color: var(--pb-text, #1f2937);
  border-radius: var(--radius-md, 8px);
  box-shadow: var(--shadow-card, 0 2px 8px rgba(0,0,0,0.06));
  min-height: 400px;
  transition: max-width .25s ease;
}

/* Mobile preview frame */
.pb-preview-wrapper {
  margin: 0 auto;
  transition: max-width .25s ease, border-radius .25s ease;
  border: 1px solid var(--color-border, #E5E7EB);
  border-radius: var(--radius-md, 8px);
  overflow: hidden;
  background: #fff;
}

.pb-preview-wrapper iframe {
  display: block;
  width: 100%;
  height: 100%;
  border: 0;
  background: #fff;
  opacity: 0;
  transition: opacity .2s ease;
}

.pb-preview-wrapper iframe.pb-preview-loaded {
  opacity: 1;
}

.pb-preview-wrapper iframe.pb-preview-loading {
  opacity: 0.4;
}

/* Mobile device frame look */
.pb-preview-wrapper.pb-mode-mobile {
  max-width: 375px;
  border-radius: 24px;
  border: 8px solid #1f2937;
  box-shadow: var(--shadow-lg, 0 8px 32px rgba(108,71,255,0.15));
}

.pb-preview-wrapper.pb-mode-tablet {
  max-width: 768px;
  border-radius: 12px;
  border: 6px solid #374151;
}

.pb-preview-wrapper.pb-mode-desktop {
  max-width: 100%;
  border: none;
  border-radius: var(--radius-md, 8px);
}

/* ─────────────────────────────────────────────
   EMPTY STATE / DROP PLACEHOLDER
───────────────────────────────────────────── */
.pb-empty-state {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 300px;
  color: var(--color-text-subtle, #9CA3AF);
  font-size: 15px;
  border: 2px dashed var(--color-border, #E5E7EB);
  border-radius: var(--radius-md, 8px);
  margin: var(--space-md, 16px);
}

.pb-drop-placeholder {
  height: 8px;
  margin: 4px var(--space-md, 16px);
  border-radius: var(--radius-sm, 4px);
  background: var(--color-primary, #6C47FF);
  opacity: .5;
}

/* ─────────────────────────────────────────────
   BLOCK WRAPPER (canvas item)
───────────────────────────────────────────── */
.pb-block-wrapper {
  position: relative;
  display: flex;
  align-items: stretch;
  gap: var(--space-sm, 8px);
  margin: var(--space-sm, 8px) var(--space-md, 16px);
  border: 1px solid transparent;
  border-radius: var(--radius-md, 8px);
  transition: border-color .15s, box-shadow .15s;
}

.pb-block-wrapper:hover {
  border-color: var(--color-primary-soft, #EDE9FF);
  box-shadow: var(--shadow-sm, 0 1px 3px rgba(0,0,0,0.08));
}

.pb-block-wrapper.pb-dragging {
  opacity: 0.4;
}

.pb-block-wrapper.pb-drag-over {
  border-color: var(--color-primary, #6C47FF);
}

.pb-block-handle {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 28px;
  cursor: grab;
  color: var(--color-text-subtle, #9CA3AF);
  flex-shrink: 0;
}

.pb-block-handle:active {
  cursor: grabbing;
}

.pb-block-body {
  flex: 1;
  min-width: 0;
  padding: var(--space-sm, 8px);
}

.pb-block-controls {
  display: flex;
  flex-direction: column;
  gap: 2px;
  align-items: center;
  justify-content: center;
  padding: var(--space-xs, 4px);
  opacity: 0;
  transition: opacity .15s;
  flex-shrink: 0;
}

.pb-block-wrapper:hover .pb-block-controls {
  opacity: 1;
}

.pb-block-controls button {
  border: none;
  background: transparent;
  cursor: pointer;
  font-size: 13px;
  padding: 2px 4px;
  border-radius: var(--radius-sm, 4px);
  color: var(--color-text-muted, #6B7280);
}

.pb-block-controls button:hover {
  background: var(--color-primary-soft, #EDE9FF);
}

.pb-block-controls button:disabled {
  opacity: .3;
  cursor: not-allowed;
}

/* ─────────────────────────────────────────────
   BLOCK PREVIEW STYLES (BlockRenderer output)
───────────────────────────────────────────── */
.pb-preview-hero {
  padding: var(--space-xxl, 48px) var(--space-lg, 24px);
  border-radius: var(--radius-md, 8px);
  background: linear-gradient(135deg, var(--pb-primary, #6C47FF), var(--color-primary-dark, #4B2FD6));
  color: #fff;
  text-align: center;
}

.pb-preview-hero-title {
  font-family: var(--font-display, 'Plus Jakarta Sans', sans-serif);
  font-size: 28px;
  font-weight: 800;
}

.pb-preview-hero-sub {
  margin-top: var(--space-sm, 8px);
  opacity: .9;
}

.pb-preview-btn,
.pb-preview-btn-el {
  display: inline-block;
  margin-top: var(--space-md, 16px);
  padding: 10px 24px;
  border-radius: var(--radius-full, 999px);
  background: var(--pb-accent, #00D1A0);
  color: #0F0F1A;
  font-weight: 600;
}

.pb-preview-text {
  padding: var(--space-sm, 8px) 0;
  line-height: 1.6;
}

.pb-preview-image,
.pb-preview-image-empty,
.pb-preview-gallery-empty {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 100px;
  background: var(--color-bg-app, #F7F8FC);
  border-radius: var(--radius-md, 8px);
  color: var(--color-text-subtle, #9CA3AF);
}

.pb-preview-gallery {
  display: flex;
  gap: var(--space-sm, 8px);
  flex-wrap: wrap;
}

.pb-gallery-thumb {
  width: 80px;
  height: 80px;
  object-fit: cover;
  border-radius: var(--radius-sm, 4px);
}

.pb-gallery-more {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 80px;
  height: 80px;
  background: var(--color-bg-app, #F7F8FC);
  border-radius: var(--radius-sm, 4px);
  color: var(--color-text-muted, #6B7280);
  font-size: 13px;
}

.pb-preview-columns {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-md, 16px);
}

.pb-col-preview {
  padding: var(--space-sm, 8px);
  background: var(--color-bg-app, #F7F8FC);
  border-radius: var(--radius-sm, 4px);
  min-height: 60px;
}

.pb-preview-button {
  display: flex;
  padding: var(--space-sm, 8px) 0;
}

.pb-preview-button.align-left   { justify-content: flex-start; }
.pb-preview-button.align-center { justify-content: center; }
.pb-preview-button.align-right  { justify-content: flex-end; }

.btn-primary   { background: var(--pb-primary, #6C47FF); color: #fff; }
.btn-secondary { background: var(--color-bg-app, #F7F8FC); color: var(--pb-text, #1f2937); }
.btn-outline   { background: transparent; border: 2px solid var(--pb-primary, #6C47FF); color: var(--pb-primary, #6C47FF); }

.pb-preview-spacer {
  display: flex;
  align-items: center;
  justify-content: center;
  border: 1px dashed var(--color-border, #E5E7EB);
  border-radius: var(--radius-sm, 4px);
}

.pb-spacer-label {
  font-size: 11px;
  color: var(--color-text-subtle, #9CA3AF);
}

.pb-preview-divider hr {
  border: none;
  border-top: 1px solid var(--color-border, #E5E7EB);
  margin: var(--space-sm, 8px) 0;
}

.pb-preview-countdown {
  text-align: center;
  padding: var(--space-md, 16px);
  background: var(--color-bg-app, #F7F8FC);
  border-radius: var(--radius-md, 8px);
}

.pb-countdown-mock {
  font-family: var(--font-mono, monospace);
  font-size: 20px;
  margin-top: var(--space-xs, 4px);
}

.pb-preview-embed,
.pb-preview-embed-empty {
  padding: var(--space-md, 16px);
  background: var(--color-bg-app, #F7F8FC);
  border-radius: var(--radius-md, 8px);
  color: var(--color-text-muted, #6B7280);
  font-family: var(--font-mono, monospace);
  font-size: 13px;
}

.pb-embed-tag {
  font-weight: 700;
  margin-right: var(--space-xs, 4px);
}

.pb-preview-plugin,
.pb-preview-unknown,
.pb-block-unknown {
  display: flex;
  align-items: center;
  gap: var(--space-sm, 8px);
  padding: var(--space-md, 16px);
  background: var(--color-primary-soft, #EDE9FF);
  border-radius: var(--radius-md, 8px);
  color: var(--color-primary-dark, #4B2FD6);
  font-size: 13px;
}

.pb-plugin-dynamic-badge {
  margin-left: auto;
  font-size: 11px;
  padding: 2px 8px;
  border-radius: var(--radius-full, 999px);
  background: var(--color-primary, #6C47FF);
  color: #fff;
}

/* ─────────────────────────────────────────────
   PALETTE (left panel — builder-blocks.js)
───────────────────────────────────────────── */
.pb-palette-group {
  margin-bottom: var(--space-lg, 24px);
}

.pb-palette-group-title {
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: .05em;
  color: var(--color-text-subtle, #9CA3AF);
  margin-bottom: var(--space-sm, 8px);
}

.pb-palette-items {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-sm, 8px);
}

.pb-palette-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
  padding: var(--space-sm, 8px);
  border: 1px solid var(--color-border, #E5E7EB);
  border-radius: var(--radius-md, 8px);
  cursor: grab;
  text-align: center;
  font-size: 12px;
  background: var(--color-surface, #fff);
  transition: border-color .15s, transform .1s;
}

.pb-palette-item:hover {
  border-color: var(--color-primary, #6C47FF);
  transform: translateY(-1px);
}

.pb-palette-item:active {
  cursor: grabbing;
}

.pb-palette-icon {
  font-size: 20px;
}

.pb-palette-label {
  color: var(--color-text-muted, #6B7280);
  line-height: 1.2;
}

.pb-palette-empty {
  padding: var(--space-lg, 24px);
  text-align: center;
  color: var(--color-text-subtle, #9CA3AF);
  font-size: 13px;
}

/* ─────────────────────────────────────────────
   PROPERTIES PANEL (right — builder-props.js)
───────────────────────────────────────────── */
.pb-props-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--space-md, 16px);
  padding-bottom: var(--space-sm, 8px);
  border-bottom: 1px solid var(--color-border, #E5E7EB);
}

.pb-props-header h3 {
  font-size: 14px;
  font-weight: 700;
  margin: 0;
}

.pb-props-header button {
  border: none;
  background: transparent;
  cursor: pointer;
  font-size: 14px;
  color: var(--color-text-muted, #6B7280);
}

.pb-props-form {
  display: flex;
  flex-direction: column;
  gap: var(--space-md, 16px);
}

.pb-props-field {
  display: flex;
  flex-direction: column;
  gap: 4px;
  font-size: 12px;
  font-weight: 600;
  color: var(--color-text-muted, #6B7280);
}

.pb-props-field input,
.pb-props-field select,
.pb-props-field textarea {
  font-size: 13px;
  font-weight: 400;
  padding: 8px 10px;
  border: 1px solid var(--color-border, #E5E7EB);
  border-radius: var(--radius-sm, 4px);
  color: var(--color-text, #111827);
  font-family: var(--font-body, 'Inter', sans-serif);
  resize: vertical;
}

.pb-props-field input:focus,
.pb-props-field select:focus,
.pb-props-field textarea:focus {
  outline: none;
  border-color: var(--color-primary, #6C47FF);
}

.pb-props-footer {
  display: flex;
  justify-content: flex-end;
}

.pb-btn-primary {
  padding: 8px 20px;
  border: none;
  border-radius: var(--radius-md, 8px);
  background: var(--color-primary, #6C47FF);
  color: #fff;
  font-weight: 600;
  font-size: 13px;
  cursor: pointer;
  transition: background .15s;
}

.pb-btn-primary:hover {
  background: var(--color-primary-dark, #4B2FD6);
}

.pb-props-empty {
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  min-height: 200px;
  color: var(--color-text-subtle, #9CA3AF);
  font-size: 13px;
}

/* ─────────────────────────────────────────────
   RESPONSIVE: collapse side panels on small screens
───────────────────────────────────────────── */
@media (max-width: 1024px) {
  .pb-builder-layout {
    grid-template-columns: 1fr;
    grid-template-rows: auto 1fr auto;
  }

  .pb-panel-blocks,
  .pb-panel-props {
    border: none;
    border-top: 1px solid var(--color-border, #E5E7EB);
    max-height: 220px;
  }

  .pb-palette-items {
    grid-template-columns: repeat(4, 1fr);
  }
}