/**
 * DZ-Whiteboard Pro — Visual Design & Desktop Presentation Styles
 * ---------------------------------------------------------------
 * Modern HeyPuter/macOS desktop styling with glassmorphism,
 * floating tool docks, multi-page slide drawer, and high-DPI canvas.
 * Zero external CSS frameworks.
 */

:root {
  --font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Tajawal", "Amiri", sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", monospace;

  /* Color System — Light Theme (Default) */
  --bg-primary: #ffffff;
  --bg-secondary: #f8fafc;
  --bg-tertiary: #f1f5f9;
  --bg-card: #ffffff;
  --bg-hover: #e2e8f0;
  --bg-active: #cbd5e1;
  --border-color: #e2e8f0;
  --border-focus: #0284c7;

  --text-primary: #0f172a;
  --text-secondary: #475569;
  --text-muted: #94a3b8;

  --accent-blue: #0284c7;
  --accent-blue-hover: #0369a1;
  --accent-emerald: #008744;
  --accent-red: #d93025;
  --accent-amber: #f59e0b;
  --accent-purple: #8b5cf6;

  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.08), 0 2px 4px -2px rgba(0, 0, 0, 0.05);
  --shadow-lg: 0 10px 25px -5px rgba(0, 0, 0, 0.12), 0 8px 10px -6px rgba(0, 0, 0, 0.08);
  --shadow-dock: 0 12px 32px rgba(0, 0, 0, 0.15), 0 2px 6px rgba(0, 0, 0, 0.06);

  --header-height: 40px;
  --dock-height: 52px;
}

[data-theme="dark"] {
  --bg-primary: #0f172a;
  --bg-secondary: #1e293b;
  --bg-tertiary: #334155;
  --bg-card: #1e293b;
  --bg-hover: #334155;
  --bg-active: #475569;
  --border-color: #334155;
  --border-focus: #38bdf8;

  --text-primary: #f8fafc;
  --text-secondary: #cbd5e1;
  --text-muted: #64748b;

  --shadow-dock: 0 12px 32px rgba(0, 0, 0, 0.45), 0 2px 6px rgba(0, 0, 0, 0.25);
}

/* Base resets */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html, body {
  width: 100%;
  height: 100%;
  overflow: hidden;
  font-family: var(--font-family);
  background: var(--bg-primary);
  color: var(--text-primary);
  user-select: none;
  -webkit-user-select: none;
}

/* App Main Layout Grid */
.whiteboard-app {
  display: flex;
  flex-direction: column;
  width: 100vw;
  height: 100vh;
  position: relative;
  overflow: hidden;
}

/* 1. Header / Menu Bar */
.app-header {
  height: var(--header-height);
  background: var(--bg-secondary);
  border-bottom: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 12px;
  z-index: 50;
  font-size: 0.85rem;
}

.header-left, .header-right {
  display: flex;
  align-items: center;
  gap: 8px;
}

.brand-badge {
  display: flex;
  align-items: center;
  gap: 8px;
  font-weight: 700;
  color: var(--text-primary);
  padding-inline-end: 12px;
  border-inline-end: 1px solid var(--border-color);
}

.brand-badge svg {
  color: var(--accent-blue);
}

.menu-bar {
  display: flex;
  align-items: center;
  gap: 2px;
}

.menu-item-wrap {
  position: relative;
}

.menu-btn {
  background: transparent;
  border: none;
  color: var(--text-secondary);
  font-size: 0.825rem;
  font-family: inherit;
  padding: 5px 10px;
  border-radius: 4px;
  cursor: pointer;
  transition: all 0.15s;
}

.menu-btn:hover, .menu-btn.active {
  background: var(--bg-hover);
  color: var(--text-primary);
}

/* Header Fast Actions */
.header-fast-tools {
  display: flex;
  align-items: center;
  gap: 4px;
  margin-inline-start: 6px;
}

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

.header-chip-btn {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  color: var(--text-secondary);
  font-size: 0.78rem;
  font-weight: 600;
  font-family: inherit;
  padding: 4px 10px;
  border-radius: 6px;
  display: flex;
  align-items: center;
  gap: 6px;
  cursor: pointer;
  transition: all 0.15s;
}

.header-chip-btn:hover {
  background: var(--bg-hover);
  color: var(--accent-blue);
  border-color: var(--accent-blue);
}

.header-chip-btn.active {
  background: var(--accent-blue);
  color: #ffffff;
  border-color: var(--accent-blue);
}

/* Dropdown Menus */
.dropdown-menu {
  position: absolute;
  top: 100%;
  inset-inline-start: 0;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  box-shadow: var(--shadow-lg);
  padding: 6px;
  min-width: 210px;
  display: none;
  flex-direction: column;
  gap: 2px;
  z-index: 100;
}

.dropdown-menu.show {
  display: flex;
}

.dropdown-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 7px 10px;
  font-size: 0.8rem;
  color: var(--text-primary);
  background: transparent;
  border: none;
  border-radius: 4px;
  cursor: pointer;
  width: 100%;
  text-align: start;
  font-family: inherit;
  transition: background 0.12s;
}

.dropdown-item:hover {
  background: var(--accent-blue);
  color: #ffffff;
}

.dropdown-item .item-shortcut {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  opacity: 0.75;
}

.dropdown-divider {
  height: 1px;
  background: var(--border-color);
  margin: 4px 0;
}

/* Header Actions */
.header-select {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  color: var(--text-primary);
  font-size: 0.8rem;
  padding: 4px 8px;
  border-radius: 4px;
  cursor: pointer;
  outline: none;
}

.icon-btn {
  background: transparent;
  border: 1px solid transparent;
  color: var(--text-secondary);
  width: 30px;
  height: 30px;
  border-radius: 6px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all 0.15s;
}

.icon-btn:hover {
  background: var(--bg-hover);
  color: var(--text-primary);
}

.icon-btn.active {
  background: var(--bg-active);
  color: var(--accent-blue);
  border-color: var(--border-color);
}

.btn-present {
  background: var(--accent-blue);
  color: #ffffff;
  border: none;
  padding: 5px 12px;
  border-radius: 6px;
  font-size: 0.825rem;
  font-weight: 600;
  display: flex;
  align-items: center;
  gap: 6px;
  cursor: pointer;
  transition: background 0.15s;
}

.btn-present:hover {
  background: var(--accent-blue-hover);
}

/* 2. Canvas Viewport */
.canvas-container {
  flex: 1;
  position: relative;
  width: 100%;
  height: calc(100% - var(--header-height));
  overflow: hidden;
}

#whiteboardCanvas {
  display: block;
  width: 100%;
  height: 100%;
  touch-action: none;
}

/* 3. Floating Bottom Toolbar Dock (Miro / Apple Freeform Style) */
.floating-dock {
  position: absolute;
  bottom: 20px;
  left: 50%;
  transform: translateX(-50%);
  background: rgba(255, 255, 255, 0.88);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid var(--border-color);
  border-radius: 14px;
  padding: 6px 10px;
  box-shadow: var(--shadow-dock);
  display: flex;
  align-items: center;
  gap: 4px;
  z-index: 40;
}

[data-theme="dark"] .floating-dock {
  background: rgba(30, 41, 59, 0.88);
}

.dock-btn {
  background: transparent;
  border: 1px solid transparent;
  color: var(--text-secondary);
  width: 40px;
  height: 40px;
  border-radius: 10px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all 0.15s;
  position: relative;
}

.dock-btn:hover {
  background: var(--bg-hover);
  color: var(--text-primary);
}

.dock-btn.active {
  background: var(--accent-blue);
  color: #ffffff;
}

.dock-btn .shortcut-badge {
  position: absolute;
  bottom: 2px;
  font-size: 9px;
  font-family: var(--font-mono);
  font-weight: 700;
  opacity: 0.85;
}

.dock-divider {
  width: 1px;
  height: 24px;
  background: var(--border-color);
  margin: 0 4px;
}

/* Submenu Flyout for Shapes and Sticky Notes */
.dock-flyout {
  position: absolute;
  bottom: calc(100% + 12px);
  left: 50%;
  transform: translateX(-50%);
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 10px;
  padding: 8px;
  box-shadow: var(--shadow-lg);
  display: none;
  grid-template-columns: repeat(3, 1fr);
  gap: 6px;
  z-index: 45;
}

.dock-flyout.show {
  display: grid;
}

.flyout-btn {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  color: var(--text-primary);
  width: 36px;
  height: 36px;
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all 0.12s;
}

.flyout-btn:hover, .flyout-btn.active {
  background: var(--accent-blue);
  color: #ffffff;
  border-color: var(--accent-blue);
}

/* 4. Contextual Style Shelf (Floating directly above the bottom toolbar dock) */
.style-shelf {
  position: absolute;
  bottom: 82px;
  left: 50%;
  transform: translateX(-50%);
  background: rgba(255, 255, 255, 0.94);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  padding: 6px 14px;
  box-shadow: var(--shadow-dock);
  display: flex;
  align-items: center;
  gap: 12px;
  z-index: 42;
  font-size: 0.8rem;
  transition: all 0.2s cubic-bezier(0.16, 1, 0.3, 1);
}

[data-theme="dark"] .style-shelf {
  background: rgba(30, 41, 59, 0.94);
}

.style-group {
  display: flex;
  align-items: center;
  gap: 6px;
}

.style-group-label {
  font-size: 0.72rem;
  font-weight: 700;
  color: var(--text-muted);
}

.color-swatch-list {
  display: flex;
  align-items: center;
  gap: 5px;
}

.color-dot {
  width: 20px;
  height: 20px;
  border-radius: 50%;
  border: 2px solid transparent;
  cursor: pointer;
  transition: transform 0.12s;
}

.color-dot:hover {
  transform: scale(1.18);
}

.color-dot.active {
  border-color: var(--accent-blue);
  box-shadow: 0 0 0 2px rgba(2, 132, 199, 0.35);
}

.custom-color-picker-wrap {
  position: relative;
  width: 22px;
  height: 22px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  border: 1px dashed var(--border-color);
  background: var(--bg-hover);
  transition: transform 0.12s;
}

.custom-color-picker-wrap:hover {
  transform: scale(1.15);
  border-color: var(--accent-blue);
}

.custom-color-picker {
  position: absolute;
  inset: 0;
  opacity: 0;
  width: 100%;
  height: 100%;
  cursor: pointer;
}

.color-picker-icon {
  font-size: 11px;
}

.stroke-width-list {
  display: flex;
  align-items: center;
  gap: 4px;
}

.stroke-width-btn {
  background: transparent;
  border: 1px solid var(--border-color);
  width: 28px;
  height: 28px;
  border-radius: 6px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  color: var(--text-secondary);
  transition: all 0.12s;
}

.stroke-width-btn:hover {
  background: var(--bg-hover);
  color: var(--text-primary);
}

.stroke-width-btn.active {
  background: var(--accent-blue);
  color: #ffffff;
  border-color: var(--accent-blue);
}

.stroke-width-bar {
  background: currentColor;
  border-radius: 2px;
}

/* 5. Pages Slide Deck Sidebar */
.pages-drawer {
  position: absolute;
  top: 0;
  inset-inline-end: 0;
  width: 260px;
  height: 100%;
  background: var(--bg-card);
  border-inline-start: 1px solid var(--border-color);
  box-shadow: var(--shadow-lg);
  display: flex;
  flex-direction: column;
  z-index: 45;
  transform: translateX(100%);
  transition: transform 0.25s cubic-bezier(0.16, 1, 0.3, 1);
}

[dir="rtl"] .pages-drawer {
  transform: translateX(-100%);
}

.pages-drawer.open {
  transform: translateX(0);
}

.drawer-header {
  padding: 12px 14px;
  border-bottom: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.drawer-title {
  font-weight: 700;
  font-size: 0.9rem;
}

.drawer-body {
  flex: 1;
  overflow-y: auto;
  padding: 10px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.page-thumb-card {
  background: var(--bg-secondary);
  border: 2px solid transparent;
  border-radius: 8px;
  padding: 8px;
  cursor: pointer;
  transition: all 0.15s;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.page-thumb-card:hover {
  background: var(--bg-hover);
}

.page-thumb-card.active {
  border-color: var(--accent-blue);
  background: var(--bg-card);
  box-shadow: var(--shadow-sm);
}

.page-thumb-preview {
  height: 90px;
  background: var(--bg-primary);
  border: 1px solid var(--border-color);
  border-radius: 6px;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

.page-thumb-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.78rem;
}

.page-name-text {
  font-weight: 600;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  max-width: 140px;
}

.btn-add-page {
  margin: 10px;
  background: var(--accent-blue);
  color: #ffffff;
  border: none;
  padding: 10px;
  border-radius: 8px;
  font-size: 0.85rem;
  font-weight: 600;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  cursor: pointer;
  transition: background 0.15s;
}

.btn-add-page:hover {
  background: var(--accent-blue-hover);
}

/* 6. Floating Zoom & Navigation Controls */
.zoom-controls {
  position: absolute;
  bottom: 20px;
  inset-inline-start: 20px;
  background: rgba(255, 255, 255, 0.9);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid var(--border-color);
  border-radius: 10px;
  padding: 4px;
  display: flex;
  align-items: center;
  gap: 4px;
  box-shadow: var(--shadow-md);
  z-index: 40;
}

[data-theme="dark"] .zoom-controls {
  background: rgba(30, 41, 59, 0.9);
}

.zoom-pct {
  font-size: 0.78rem;
  font-family: var(--font-mono);
  font-weight: 600;
  padding: 0 6px;
  min-width: 44px;
  text-align: center;
}

/* 7. Floating Minimap Radar */
.minimap-box {
  position: absolute;
  bottom: 20px;
  inset-inline-end: 20px;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 10px;
  padding: 4px;
  box-shadow: var(--shadow-md);
  z-index: 40;
  display: flex;
  flex-direction: column;
}

#minimapCanvas {
  display: block;
  border-radius: 6px;
  background: #f8fafc;
}

/* 8. Inline Text Editor Overlay */
.text-editor-overlay {
  position: absolute;
  display: none;
  background: transparent;
  outline: 2px dashed var(--accent-blue);
  border: none;
  padding: 4px;
  resize: none;
  font-family: system-ui, sans-serif;
  color: var(--text-primary);
  line-height: 1.35;
  z-index: 60;
}

/* 9. Presenter Focus Mode */
.presenter-mode .app-header,
.presenter-mode .pages-drawer,
.presenter-mode .minimap-box,
.presenter-mode .zoom-controls {
  display: none !important;
}

.presenter-bar {
  position: absolute;
  top: 16px;
  left: 50%;
  transform: translateX(-50%);
  background: rgba(15, 23, 42, 0.9);
  color: #fff;
  border-radius: 20px;
  padding: 6px 16px;
  display: none;
  align-items: center;
  gap: 14px;
  z-index: 70;
  box-shadow: 0 10px 25px rgba(0,0,0,0.4);
}

.presenter-mode .presenter-bar {
  display: flex;
}

/* 10. Modals & Dialog System */
.modal-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.65);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
  z-index: 9999;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 16px;
}

.modal-card {
  background: var(--bg-card);
  color: var(--text-primary);
  border-radius: 14px;
  max-width: 500px;
  width: 95%;
  padding: 24px;
  box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.35);
  border: 1px solid var(--border-color);
  animation: modalPop 0.2s cubic-bezier(0.16, 1, 0.3, 1);
}

.modal-large {
  max-width: 820px;
}

@keyframes modalPop {
  from { opacity: 0; transform: scale(0.95); }
  to { opacity: 1; transform: scale(1); }
}

.modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 6px;
}

.modal-title {
  font-size: 1.15rem;
  font-weight: 800;
  color: var(--text-primary);
}

.modal-subtitle {
  font-size: 0.85rem;
  color: var(--text-secondary);
  margin-bottom: 18px;
}

.btn-close-modal {
  font-size: 1.25rem;
  line-height: 1;
}

/* Templates Grid */
.templates-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 14px;
}

@media (max-width: 768px) {
  .templates-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

.template-card {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: 10px;
  overflow: hidden;
  cursor: pointer;
  transition: all 0.2s;
  display: flex;
  flex-direction: column;
}

.template-card:hover {
  transform: translateY(-3px);
  border-color: var(--accent-blue);
  box-shadow: var(--shadow-md);
}

.template-thumb {
  height: 90px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: #f1f5f9;
  color: var(--accent-blue);
}

[data-theme="dark"] .template-thumb {
  background: #0f172a;
}

.math-thumb { background: linear-gradient(135deg, rgba(2, 132, 199, 0.12), rgba(2, 132, 199, 0.04)); color: #0284c7; }
.mindmap-thumb { background: linear-gradient(135deg, rgba(139, 92, 246, 0.12), rgba(139, 92, 246, 0.04)); color: #8b5cf6; }
.kanban-thumb { background: linear-gradient(135deg, rgba(16, 185, 129, 0.12), rgba(16, 185, 129, 0.04)); color: #10b981; }
.calligraphy-thumb { background: linear-gradient(135deg, rgba(245, 158, 11, 0.12), rgba(245, 158, 11, 0.04)); color: #f59e0b; }
.flowchart-thumb { background: linear-gradient(135deg, rgba(239, 68, 68, 0.12), rgba(239, 68, 68, 0.04)); color: #ef4444; }
.table-thumb { background: linear-gradient(135deg, rgba(14, 165, 233, 0.12), rgba(14, 165, 233, 0.04)); color: #0ea5e9; }

.template-info {
  padding: 10px;
}

.template-name {
  font-size: 0.88rem;
  font-weight: 700;
  margin-bottom: 4px;
}

.template-desc {
  font-size: 0.75rem;
  color: var(--text-muted);
  line-height: 1.4;
}

/* Math Symbols Grid */
.math-symbols-grid {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 8px;
}

.math-sym-btn {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text-primary);
  cursor: pointer;
  transition: all 0.15s;
}

.math-sym-btn:hover {
  background: var(--accent-blue);
  color: #ffffff;
  border-color: var(--accent-blue);
  transform: scale(1.08);
}