:root {
  --collapse-btn-offset: -13px;
  --collapse-btn-offset-collapsed: -26px;
  --collapse-btn-offset-mobile: -10px;
  --collapse-btn-offset-collapsed-mobile: -18px;
}

body {
  margin: 0;
  padding: 0;
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Oxygen',
    'Ubuntu', 'Cantarell', 'Fira Sans', 'Droid Sans', 'Helvetica Neue',
    sans-serif;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow: hidden;
  background: #f0f0f0;
  touch-action: none; /* Prevent default browser zoom and pan on mobile */
}

* {
  box-sizing: border-box;
}

.app {
  display: flex;
  flex-direction: column;
  width: 100vw;
  height: 100vh;
  background: #e8e8e8;
  color: #333;
}

.header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 20px;
  background: #d0d0d0;
  border-bottom: 2px solid #a0a0a0;
  height: 60px;
  flex-wrap: wrap;
}

@media (max-width: 768px) {
  .header {
    padding: 8px 12px;
    height: auto;
    min-height: 50px;
  }
}

.logo {
  font-size: 20px;
  font-weight: bold;
  color: #333;
  display: flex;
  flex-direction: column;
  gap: 2px;
}

@media (max-width: 768px) {
  .logo {
    font-size: 16px;
  }
  
  .logo .version {
    display: none;
  }
}

.version {
  font-size: 11px;
  font-weight: normal;
  color: #666;
  font-family: monospace;
}

.toolbar {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

@media (max-width: 768px) {
  .toolbar {
    gap: 4px;
    max-height: 80px;
    overflow-x: auto;
    overflow-y: hidden;
  }
}

.toolbar-group {
  display: flex;
  gap: 4px;
  padding: 0 8px;
  border-right: 1px solid #999;
}

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

@media (max-width: 768px) {
  .toolbar-group {
    padding: 0 4px;
    gap: 2px;
  }
}

.btn {
  padding: 6px 12px;
  background: #f5f5f5;
  border: 2px solid #999;
  border-radius: 4px;
  cursor: pointer;
  font-size: 13px;
  color: #333;
  transition: all 0.2s;
  white-space: nowrap;
}

@media (max-width: 768px) {
  .btn {
    padding: 4px 8px;
    font-size: 11px;
    border-width: 1px;
  }
}

.btn:hover:not(:disabled) {
  background: #fff;
  border-color: #666;
}

.btn:active:not(:disabled) {
  background: #e0e0e0;
}

.btn.active {
  background: #c0c0c0;
  border-color: #666;
}

.btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.collaborate-btn {
  text-decoration: none;
  display: inline-block;
}

.main-content {
  display: flex;
  flex: 1;
  overflow: hidden;
}

.sidebar {
  width: 250px;
  background: #d8d8d8;
  border-right: 2px solid #a0a0a0;
  padding: 16px;
  overflow-y: auto;
  position: relative;
  transition: all 0.3s ease;
}

.sidebar.collapsed {
  width: 0;
  min-width: 0;
  padding: 0;
  border-right: none;
  overflow: visible;
  position: relative;
  z-index: 1001;
}

.sidebar.collapsed > *:not(.collapse-btn) {
  display: none;
}

@media (max-width: 768px) {
  .sidebar {
    width: 200px;
    padding: 12px;
  }
}

.sidebar h3 {
  margin: 0 0 12px 0;
  font-size: 14px;
  color: #333;
}

.components-list {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-bottom: 20px;
}

.component-btn {
  padding: 12px;
  background: #f0f0f0;
  border: 2px solid #999;
  border-radius: 4px;
  cursor: grab;
  font-size: 12px;
  text-align: left;
  transition: all 0.2s;
  display: flex;
  align-items: center;
  gap: 12px;
  touch-action: none; /* Allow custom touch handling for dragging */
}

.component-btn span {
  flex: 1;
}

.component-preview {
  width: 50px;
  height: 40px;
  border: 2px solid #333;
  background: #fff;
  border-radius: 2px;
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 10px;
  position: relative;
}

.button-preview {
  border: 3px solid #333;
  border-radius: 4px;
  font-weight: bold;
}

.button-preview::after {
  content: 'Button';
  font-size: 8px;
}

.input-preview {
  border: 2px solid #666;
  background: #fff;
  box-shadow: inset 1px 1px 2px rgba(0,0,0,0.1);
}

.input-preview::after {
  content: 'Input';
  font-size: 8px;
  color: #999;
}

.text-preview {
  border: none;
  background: transparent;
  justify-content: flex-start;
  padding-left: 4px;
}

.text-preview::after {
  content: 'Text';
  font-size: 8px;
}

.image-preview {
  border: 3px solid #333;
  background: #e8e8e8;
}

.image-preview::before {
  content: '🖼';
  font-size: 16px;
  opacity: 0.4;
}

.navbar-preview {
  border: 3px solid #333;
  background: #d0d0d0;
  border-radius: 2px;
}

.navbar-preview::after {
  content: 'Nav';
  font-size: 8px;
}

.table-preview {
  border: 3px solid #333;
  background: 
    linear-gradient(#333 1px, transparent 1px),
    linear-gradient(90deg, #333 1px, transparent 1px),
    #fff;
  background-size: 50% 50%;
  background-position: 0 0, 0 0, 0 0;
}

.modal-preview {
  border: 3px solid #333;
  border-radius: 4px;
  background: #f5f5f5;
  box-shadow: 0 2px 6px rgba(0,0,0,0.3);
}

.modal-preview::after {
  content: '□';
  font-size: 14px;
}

.frame-preview {
  border: 3px dashed #666;
  background: transparent;
}

.browser-preview {
  border: 3px solid #333;
  border-radius: 4px 4px 0 0;
  background: #fff;
  position: relative;
}

.browser-preview::before {
  content: '';
  position: absolute;
  top: 2px;
  left: 2px;
  right: 2px;
  height: 8px;
  background: #d0d0d0;
  border-radius: 2px;
}

.browser-preview::after {
  content: '○○○';
  position: absolute;
  top: 2px;
  left: 4px;
  font-size: 6px;
  color: #666;
}

.mobile-preview {
  border: 4px solid #333;
  border-radius: 8px;
  background: #fff;
  position: relative;
  width: 30px;
  height: 40px;
}

.mobile-preview::before {
  content: '';
  position: absolute;
  top: 2px;
  left: 50%;
  transform: translateX(-50%);
  width: 8px;
  height: 2px;
  background: #666;
  border-radius: 1px;
}

.mobile-preview::after {
  content: '';
  position: absolute;
  bottom: 3px;
  left: 50%;
  transform: translateX(-50%);
  width: 10px;
  height: 2px;
  background: #666;
  border-radius: 1px;
}

.component-btn:active {
  cursor: grabbing;
}

.component-btn:hover {
  background: #fff;
  border-color: #666;
}

.canvas-container {
  flex: 1;
  position: relative;
  overflow: hidden;
  background: #f5f5f5;
  touch-action: none; /* Allow custom touch handling */
}

.canvas {
  position: absolute;
  width: 100%;
  height: 100%;
  overflow: auto;
  cursor: default;
}

.canvas.grabbing {
  cursor: grabbing;
}

.canvas-content {
  position: relative;
  transform-origin: 0 0;
  min-width: 5000px;
  min-height: 5000px;
  pointer-events: auto;
}

.grid {
  position: absolute;
  top: 0;
  left: 0;
  background-image: 
    repeating-linear-gradient(0deg, #ddd 0, #ddd 1px, transparent 1px, transparent 20px),
    repeating-linear-gradient(90deg, #ddd 0, #ddd 1px, transparent 1px, transparent 20px);
  pointer-events: none;
}

.grid.hidden {
  display: none;
}

.element {
  position: absolute;
  cursor: move;
  user-select: none;
}

.element.selected {
  outline: 2px dashed #666;
  outline-offset: 2px;
}

.element-content {
  width: 100%;
  height: 100%;
  background: #fff;
  border: 2px solid #333;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 8px;
  font-size: 14px;
  color: #333;
  overflow: hidden;
  text-overflow: ellipsis;
  position: relative;
  /* Sketch-style rough edges */
  border-radius: 2px;
  box-shadow: 
    1px 1px 0 rgba(0,0,0,0.05),
    -1px 1px 0 rgba(0,0,0,0.05),
    1px -1px 0 rgba(0,0,0,0.05);
}

.resize-handle {
  position: absolute;
  width: 10px;
  height: 10px;
  background: #666;
  border: 1px solid #333;
  z-index: 10;
  pointer-events: auto;
}

.resize-handle.nw { top: -5px; left: -5px; cursor: nw-resize; }
.resize-handle.ne { top: -5px; right: -5px; cursor: ne-resize; }
.resize-handle.sw { bottom: -5px; left: -5px; cursor: sw-resize; }
.resize-handle.se { bottom: -5px; right: -5px; cursor: se-resize; }
.resize-handle.n { top: -5px; left: 50%; margin-left: -5px; cursor: n-resize; }
.resize-handle.s { bottom: -5px; left: 50%; margin-left: -5px; cursor: s-resize; }
.resize-handle.w { top: 50%; margin-top: -5px; left: -5px; cursor: w-resize; }
.resize-handle.e { top: 50%; margin-top: -5px; right: -5px; cursor: e-resize; }

.pages-list {
  margin-bottom: 8px;
}

.page-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 8px;
  background: #f0f0f0;
  border: 2px solid #999;
  border-radius: 4px;
  margin-bottom: 4px;
  cursor: pointer;
  transition: all 0.2s;
}

.page-item:hover {
  background: #fff;
}

.page-item.active {
  background: #c0c0c0;
  border-color: #666;
}

.page-name {
  flex: 1;
  font-size: 13px;
  color: #333;
}

.page-delete {
  padding: 2px 6px;
  background: transparent;
  border: 1px solid #999;
  border-radius: 2px;
  cursor: pointer;
  font-size: 11px;
  color: #666;
}

.page-delete:hover {
  background: #f00;
  color: #fff;
  border-color: #f00;
}

.zoom-control {
  position: absolute;
  bottom: 20px;
  right: 20px;
  display: flex;
  gap: 4px;
  background: #d0d0d0;
  border: 2px solid #999;
  border-radius: 4px;
  padding: 4px;
}

.zoom-btn {
  padding: 4px 8px;
  background: #f5f5f5;
  border: 1px solid #999;
  border-radius: 2px;
  cursor: pointer;
  font-size: 12px;
  color: #333;
}

.zoom-btn:hover {
  background: #fff;
}

.zoom-level {
  padding: 4px 8px;
  font-size: 12px;
  color: #333;
  min-width: 50px;
  text-align: center;
}

.property-panel {
  width: 250px;
  background: #d8d8d8;
  border-left: 2px solid #a0a0a0;
  padding: 16px;
  overflow-y: auto;
  position: relative;
  transition: all 0.3s ease;
}

.property-panel.collapsed {
  width: 0;
  min-width: 0;
  padding: 0;
  border-left: none;
  overflow: visible;
}

.property-panel.collapsed > *:not(.collapse-btn) {
  display: none;
}

@media (max-width: 768px) {
  .property-panel {
    width: 200px;
    padding: 12px;
  }
}

.property-group {
  margin-bottom: 16px;
}

.property-group label {
  display: block;
  font-size: 12px;
  color: #333;
  margin-bottom: 4px;
  font-weight: 500;
}

.property-group input,
.property-group textarea {
  width: 100%;
  padding: 6px;
  background: #f5f5f5;
  border: 2px solid #999;
  border-radius: 4px;
  font-size: 13px;
  color: #333;
  font-family: inherit;
}

.property-group textarea {
  min-height: 60px;
  resize: vertical;
}

.property-group input:focus,
.property-group textarea:focus {
  outline: none;
  border-color: #666;
  background: #fff;
}

/* Component-specific styles */
.element-content.button {
  border: 3px solid #333;
  border-radius: 6px;
  font-weight: bold;
  /* Rough sketch-style border */
  box-shadow: 
    2px 0 0 rgba(0,0,0,0.1),
    -2px 0 0 rgba(0,0,0,0.1),
    0 2px 0 rgba(0,0,0,0.1),
    0 -2px 0 rgba(0,0,0,0.1);
}

.element-content.input {
  border: 2px solid #666;
  border-radius: 4px;
  background: #fff;
  box-shadow: 
    inset 1px 1px 2px rgba(0,0,0,0.1),
    1px 1px 0 rgba(0,0,0,0.05);
}

.element-content.text {
  border: none;
  background: transparent;
  justify-content: flex-start;
  box-shadow: none;
}

.element-content.image {
  border: 3px solid #333;
  background: #e8e8e8;
  position: relative;
  box-shadow: 
    2px 2px 0 rgba(0,0,0,0.1),
    -1px 1px 0 rgba(0,0,0,0.05);
}

.element-content.image::before {
  content: '🖼';
  font-size: 32px;
  opacity: 0.4;
}

.element-content.navbar {
  border: 3px solid #333;
  background: #d0d0d0;
  justify-content: space-around;
  box-shadow: 
    0 3px 0 rgba(0,0,0,0.15),
    2px 0 0 rgba(0,0,0,0.1),
    -2px 0 0 rgba(0,0,0,0.1);
}

.element-content.table {
  border: 3px solid #333;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2px;
  background: #333;
  padding: 2px;
  box-shadow: 
    2px 2px 0 rgba(0,0,0,0.15),
    -1px 1px 0 rgba(0,0,0,0.1);
}

.table-cell {
  background: #fff;
  padding: 4px;
  font-size: 12px;
}

.element-content.modal {
  border: 4px solid #333;
  border-radius: 8px;
  background: #f5f5f5;
  box-shadow: 
    0 4px 12px rgba(0,0,0,0.3),
    3px 0 0 rgba(0,0,0,0.1),
    -3px 0 0 rgba(0,0,0,0.1),
    0 3px 0 rgba(0,0,0,0.1),
    0 -3px 0 rgba(0,0,0,0.1);
}

.element-content.frame {
  border: 3px dashed #666;
  background: transparent;
  box-shadow: none;
}

/* Browser Window Component */
.element-content.browser {
  border: 3px solid #333;
  border-radius: 8px 8px 0 0;
  background: #fff;
  display: flex;
  flex-direction: column;
  padding: 0;
}

.browser-bar {
  background: #d0d0d0;
  border-bottom: 2px solid #333;
  padding: 8px;
  display: flex;
  align-items: center;
  gap: 8px;
  border-radius: 6px 6px 0 0;
  min-height: 40px;
}

.browser-controls {
  display: flex;
  gap: 4px;
}

.browser-controls span {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  border: 2px solid #333;
  display: inline-block;
  font-size: 8px;
  line-height: 8px;
  text-align: center;
}

.browser-address {
  flex: 1;
  background: #fff;
  border: 2px solid #333;
  border-radius: 4px;
  padding: 4px 8px;
  font-size: 11px;
}

.browser-content {
  flex: 1;
  padding: 16px;
  background: #fff;
  overflow: hidden;
}

/* Mobile App Component */
.element-content.mobile {
  border: 4px solid #333;
  border-radius: 24px;
  background: #fff;
  display: flex;
  flex-direction: column;
  padding: 12px 8px;
  box-shadow: 0 4px 12px rgba(0,0,0,0.2), inset 0 1px 0 rgba(255,255,255,0.5);
}

.mobile-header {
  height: 24px;
  background: #f5f5f5;
  border-bottom: 1px solid #ddd;
  border-radius: 4px 4px 0 0;
  position: relative;
  margin-bottom: 4px;
}

.mobile-header::before {
  content: '';
  position: absolute;
  top: 8px;
  left: 50%;
  transform: translateX(-50%);
  width: 60px;
  height: 4px;
  background: #666;
  border-radius: 2px;
}

.mobile-content {
  flex: 1;
  padding: 16px;
  overflow: hidden;
  background: #fff;
}

.mobile-footer {
  height: 40px;
  background: #f5f5f5;
  border-top: 1px solid #ddd;
  border-radius: 0 0 4px 4px;
  position: relative;
  margin-top: 4px;
}

.mobile-footer::before {
  content: '';
  position: absolute;
  bottom: 12px;
  left: 50%;
  transform: translateX(-50%);
  width: 50px;
  height: 4px;
  background: #333;
  border-radius: 2px;
}

/* Context Menu */
.context-menu {
  position: fixed;
  background: #fff;
  border: 2px solid #333;
  border-radius: 4px;
  box-shadow: 0 4px 12px rgba(0,0,0,0.2);
  z-index: 10000;
  min-width: 150px;
}

.context-menu-item {
  padding: 8px 12px;
  cursor: pointer;
  font-size: 13px;
  color: #333;
  border-bottom: 1px solid #ddd;
}

.context-menu-item:last-child {
  border-bottom: none;
}

.context-menu-item:hover {
  background: #f0f0f0;
}

.collapse-btn {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  width: 24px;
  height: 60px;
  background: #c0c0c0;
  border: 2px solid #999;
  border-radius: 4px;
  cursor: pointer;
  font-size: 18px;
  font-weight: bold;
  color: #333;
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
  transition: all 0.2s;
  pointer-events: auto;
}

.collapse-btn:hover {
  background: #b0b0b0;
  border-color: #666;
}

.sidebar .collapse-btn {
  right: var(--collapse-btn-offset);
}

.sidebar.collapsed .collapse-btn {
  right: var(--collapse-btn-offset-collapsed);
  border-radius: 0 4px 4px 0;
}

.property-panel .collapse-btn {
  left: var(--collapse-btn-offset);
}

.property-panel.collapsed .collapse-btn {
  left: var(--collapse-btn-offset-collapsed);
  border-radius: 4px 0 0 4px;
}

@media (max-width: 768px) {
  .collapse-btn {
    width: 16px;
    height: 40px;
    font-size: 14px;
  }
  
  .sidebar .collapse-btn {
    right: var(--collapse-btn-offset-mobile);
  }
  
  .sidebar.collapsed .collapse-btn {
    right: var(--collapse-btn-offset-collapsed-mobile);
  }
  
  .property-panel .collapse-btn {
    left: var(--collapse-btn-offset-mobile);
  }
  
  .property-panel.collapsed .collapse-btn {
    left: var(--collapse-btn-offset-collapsed-mobile);
  }
}

/* Drag ghost preview */
.drag-ghost {
  position: fixed;
  pointer-events: none;
  z-index: 10000;
  opacity: 0.5;
  transform: translate(-50%, -50%);
}

.drag-ghost .element-content {
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
}