.canvas-container {
  display: flex;
  height: calc(100vh - 120px);
  gap: 16px;
  padding: 16px;
  background: var(--bg-primary);
  min-height: 0;
}
.canvas-sidebar {
  width: 280px;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  display: flex;
  flex-direction: column;
  flex-shrink: 0;
  overflow: hidden;
}
.canvas-sidebar-header {
  padding: 16px;
  border-bottom: 1px solid var(--border-color);
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-shrink: 0;
}
.canvas-sidebar-header h3 {
  margin: 0;
  font-size: 16px;
  font-weight: 600;
  color: var(--text-primary);
}
.canvas-board-search {
  padding: 12px 16px;
  border-bottom: 1px solid var(--border-color);
}
.canvas-board-search .form-input {
  width: 100%;
  padding: 8px 12px;
  border: 1px solid var(--border-color);
  border-radius: 6px;
  background: var(--bg-primary);
  color: var(--text-primary);
  font-size: 13px;
}
.canvas-board-search .form-input:focus {
  outline: none;
  border-color: var(--accent-primary);
}
.canvas-tag-filter {
  padding: 12px 16px;
  border-bottom: 1px solid var(--border-color);
}
.tag-filter-select {
  width: 100%;
  padding: 8px 12px;
  background: var(--bg-primary);
  border: 1px solid var(--border-color);
  border-radius: 6px;
  color: var(--text-primary);
  font-size: 13px;
  cursor: pointer;
  outline: none;
}
.tag-filter-select:hover {
  border-color: var(--accent-primary);
}
.tag-filter-select option {
  background: var(--bg-card);
  color: var(--text-primary);
}
.canvas-boards-list {
  flex: 1;
  overflow-y: auto;
  padding: 8px;
}
.canvas-board-item {
  padding: 12px;
  margin-bottom: 4px;
  border-radius: 6px;
  cursor: pointer;
  transition: all 0.2s;
  border: 1px solid transparent;
  background: var(--bg-primary);
}
.canvas-board-item:hover {
  background: var(--bg-secondary);
  border-color: var(--border-color);
}
.canvas-board-item.active {
  background: rgba(var(--accent-primary-rgb),0.1);
  border-color: var(--accent-primary);
}
.canvas-board-info {
  display: flex;
  flex-direction: column;
  gap: 4px;
}
.canvas-board-name {
  font-weight: 500;
  margin-bottom: 4px;
  font-size: 14px;
  color: var(--text-primary);
}
.canvas-board-tags {
  display: flex;
  gap: 4px;
  flex-wrap: wrap;
  margin: 4px 0;
}
.tag-badge {
  padding: 2px 8px;
  border-radius: 4px;
  font-size: 11px;
  font-weight: 500;
}
.canvas-board-date {
  font-size: 11px;
  color: var(--text-muted);
}
.canvas-board-stats {
  display: flex;
  gap: 8px;
  font-size: 11px;
  color: var(--text-secondary);
}
.canvas-board-actions {
  display: flex;
  gap: 4px;
  margin-top: 8px;
}
.canvas-main-area {
  flex: 1;
  display: flex;
  flex-direction: column;
  min-height: 0;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  overflow: hidden;
}
.canvas-toolbar-compact {
  padding: 12px 16px;
  border-bottom: 1px solid var(--border-color);
  background: var(--bg-secondary);
  flex-shrink: 0;
  overflow-x: auto;
}
.canvas-toolbar-group-compact {
  display: flex;
  gap: 8px;
  align-items: center;
  flex-wrap: nowrap;
  min-width: min-content;
}
.canvas-toolbar-btn-compact {
  padding: 8px 12px;
  border: 1px solid var(--border-color);
  border-radius: 6px;
  background: var(--bg-primary);
  cursor: pointer;
  font-size: 13px;
  transition: all 0.2s;
  display: flex;
  align-items: center;
  gap: 6px;
  color: var(--text-secondary);
  white-space: nowrap;
  height: 36px;
  flex-shrink: 0;
}
.canvas-toolbar-btn-compact:hover {
  background: var(--bg-hover);
  border-color: var(--accent-primary);
  color: var(--text-primary);
}
.canvas-toolbar-btn-compact.active {
  background: var(--accent-primary);
  border-color: var(--accent-primary);
  color: #fff;
}
.toolbar-separator {
  width: 1px;
  height: 24px;
  background: var(--border-color);
  flex-shrink: 0;
}
.canvas-drawing-tools {
  display: flex;
  gap: 16px;
  align-items: center;
  padding: 12px 16px;
  background: var(--bg-secondary);
  border-bottom: 1px solid var(--border-color);
  flex-shrink: 0;
  overflow-x: auto;
}
.canvas-tool-section {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-shrink: 0;
}
.canvas-tool-section label {
  font-size: 12px;
  color: var(--text-muted);
  font-weight: 500;
  white-space: nowrap;
}
.canvas-color-palette {
  display: flex;
  gap: 4px;
  align-items: center;
}
.canvas-color-swatch {
  width: 20px;
  height: 20px;
  border-radius: 4px;
  cursor: pointer;
  border: 2px solid transparent;
  transition: all 0.2s;
  flex-shrink: 0;
}
.canvas-color-swatch:hover {
  transform: scale(1.1);
}
.canvas-color-swatch.active {
  border-color: var(--text-primary);
  transform: scale(1.1);
}
.canvas-color-picker {
  width: 24px;
  height: 24px;
  border: 1px solid var(--border-color);
  border-radius: 4px;
  cursor: pointer;
  background: transparent;
}
.canvas-brush-sizes {
  display: flex;
  gap: 8px;
  align-items: center;
}
.canvas-brush-size {
  cursor: pointer;
  border-radius: 50%;
  background: var(--text-primary);
  border: 2px solid transparent;
  transition: all 0.2s;
  flex-shrink: 0;
}
.canvas-brush-size:hover {
  opacity: 0.8;
}
.canvas-brush-size.active {
  border-color: var(--accent-primary);
  transform: scale(1.1);
}
.canvas-brush-size.small { width: 8px; height: 8px; }
.canvas-brush-size.medium { width: 12px; height: 12px; }
.canvas-brush-size.large { width: 16px; height: 16px; }
.canvas-brush-size.xlarge { width: 20px; height: 20px; }
.canvas-brush-size.xxlarge { width: 24px; height: 24px; }
.canvas-board-surface {
  flex: 1;
  position: relative;
  overflow: hidden;
  background: var(--bg-primary);
  min-height: 0;
}
.canvas-drawing-surface {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 2;
  cursor: crosshair;
  background: transparent;
}
.canvas-empty-state-compact {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%,-50%);
  text-align: center;
  z-index: 5;
  color: var(--text-muted);
  pointer-events: none;
}
.canvas-empty-state-compact h3 {
  margin: 0 0 8px;
  font-size: 18px;
  font-weight: 600;
  color: var(--text-primary);
}
.canvas-empty-state-compact p {
  margin: 0 0 16px;
  opacity: 0.8;
}
.canvas-empty-state-actions {
  pointer-events: auto;
  display: flex;
  gap: 8px;
  justify-content: center;
}
.canvas-status-bar-compact {
  padding: 8px 16px;
  border-top: 1px solid var(--border-color);
  background: var(--bg-secondary);
  display: flex;
  gap: 12px;
  font-size: 12px;
  color: var(--text-muted);
  flex-shrink: 0;
  overflow-x: auto;
  flex-wrap: wrap;
}
.canvas-status-bar-compact span {
  white-space: nowrap;
}
.canvas-context-menu-compact {
  position: absolute;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 6px;
  padding: 4px;
  box-shadow: 0 4px 24px rgba(0,0,0,0.15);
  z-index: 10000;
  min-width: 160px;
  display: none;
}
.canvas-context-menu-compact.show {
  display: block;
}
.canvas-context-item {
  padding: 8px 12px;
  cursor: pointer;
  border-radius: 4px;
  font-size: 13px;
  transition: background 0.2s;
  display: flex;
  align-items: center;
  gap: 8px;
  color: var(--text-primary);
}
.canvas-context-item:hover {
  background: var(--bg-secondary);
}
.canvas-context-divider {
  height: 1px;
  background: var(--border-color);
  margin: 4px 0;
}
.btn-icon {
  width: 28px;
  height: 28px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: transparent;
  border: 1px solid var(--border-color);
  border-radius: 4px;
  cursor: pointer;
  font-size: 14px;
  transition: all 0.2s;
  color: var(--text-secondary);
  flex-shrink: 0;
}
.btn-icon:hover {
  background: var(--bg-hover);
  border-color: var(--accent-primary);
  color: var(--text-primary);
}

.tag-checkbox {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 4px;
  cursor: pointer;
}

.tag-label {
  padding: 2px 8px;
  border-radius: 4px;
  font-size: 12px;
}

.canvas-tag {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    border-radius: 16px;
    padding: 4px 12px;
    font-size: 12px;
    cursor: pointer;
    transition: all 0.2s ease;
}

.canvas-tag-add-btn {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    background: var(--bg-secondary);
    border: 1px dashed var(--border-color);
    border-radius: 16px;
    padding: 4px 12px;
    font-size: 12px;
    cursor: pointer;
    color: var(--text-secondary);
    transition: all 0.2s ease;
}

.canvas-tag-add-btn:hover {
    border-color: var(--accent-primary);
    color: var(--accent-primary);
    background: var(--accent-light);
}

.canvas-modal {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.6);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 10001;
    backdrop-filter: blur(4px);
}

.canvas-modal-content {
    background: var(--bg-card);
    border-radius: 16px;
    width: 400px;
    max-width: 90vw;
    max-height: 90vh;
    overflow: hidden;
    box-shadow: var(--shadow);
    border: 1px solid var(--border-color);
}

.canvas-modal-header {
    padding: 16px 20px;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.canvas-modal-header h3 {
    margin: 0;
    font-size: 18px;
    font-weight: 600;
    color: var(--text-primary);
}

.canvas-modal-close {
    background: transparent;
    border: none;
    font-size: 24px;
    cursor: pointer;
    color: var(--text-muted);
    transition: color 0.2s;
}

.canvas-modal-close:hover {
    color: var(--text-primary);
}

.canvas-modal-body {
    padding: 20px;
}

.canvas-tag-selector {
    display: flex;
    flex-direction: column;
    gap: 8px;
    max-height: 300px;
    overflow-y: auto;
}

.canvas-tag-option {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 10px 12px;
    border: 1px solid var(--border-color);
    border-radius: 10px;
    cursor: pointer;
    transition: all 0.2s;
    background: var(--bg-primary);
}

.canvas-tag-option:hover {
    background: var(--bg-hover);
    border-color: var(--accent-primary);
}

.canvas-tag-option.selected {
    background: var(--accent-light);
    border-color: var(--accent-primary);
}

.canvas-tag-color {
    width: 16px;
    height: 16px;
    border-radius: 4px;
    flex-shrink: 0;
}

.canvas-tag-name {
    flex: 1;
    font-size: 14px;
    color: var(--text-primary);
}

.canvas-modal-footer {
    padding: 16px 20px;
    border-top: 1px solid var(--border-color);
    display: flex;
    justify-content: flex-end;
    gap: 12px;
}

.canvas-btn {
    padding: 8px 16px;
    border-radius: 8px;
    font-size: 14px;
    cursor: pointer;
    transition: all 0.2s;
    border: 1px solid var(--border-color);
    background: var(--bg-secondary);
    color: var(--text-primary);
}

.canvas-btn-primary {
    background: var(--accent-primary);
    border-color: var(--accent-primary);
    color: white;
}

.canvas-btn-primary:hover {
    filter: brightness(1.05);
}

.canvas-board-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
    align-items: center;
    margin: 8px 0 4px;
}

.canvas-page-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 4px;
    align-items: center;
}

.wiki-page-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 4px;
    align-items: center;
}

.wiki-tag {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    padding: 2px 8px;
    border-radius: 4px;
    border: 1px solid;
    font-size: 11px;
    cursor: pointer;
    transition: opacity 0.2s;
}

.wiki-tag:hover {
    opacity: 0.8;
}

.wiki-tag-remove {
    font-weight: bold;
    margin-left: 2px;
}

.wiki-tag-add-btn {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    background: var(--bg-secondary);
    border: 1px dashed var(--border-color);
    border-radius: 16px;
    padding: 4px 12px;
    font-size: 12px;
    cursor: pointer;
    color: var(--text-secondary);
    transition: all 0.2s ease;
}

.wiki-tag-add-btn:hover {
    border-color: var(--accent-primary);
    color: var(--accent-primary);
    background: var(--accent-light);
}

.modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 10000;
}

.modal-content {
    background: var(--bg-card);
    border-radius: 12px;
    width: 90%;
    max-width: 500px;
    max-height: 90vh;
    overflow-y: auto;
    box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
}

.modal-header {
    padding: 16px 20px;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.modal-title {
    margin: 0;
    font-size: 18px;
    font-weight: 600;
    color: var(--text-primary);
}

.modal-close {
    background: none;
    border: none;
    font-size: 24px;
    cursor: pointer;
    color: var(--text-muted);
    padding: 0;
    line-height: 1;
}

.modal-close:hover {
    color: var(--text-primary);
}

.modal-body {
    padding: 20px;
}

.modal-footer {
    padding: 16px 20px;
    border-top: 1px solid var(--border-color);
    display: flex;
    justify-content: flex-end;
    gap: 12px;
}

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

.form-label {
    display: block;
    margin-bottom: 6px;
    font-size: 13px;
    font-weight: 500;
    color: var(--text-primary);
}

.form-input {
    width: 100%;
    padding: 8px 12px;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    background: var(--bg-primary);
    color: var(--text-primary);
    font-size: 14px;
}

.form-input:focus {
    outline: none;
    border-color: var(--accent-primary);
}

.checkbox-label {
    display: flex;
    align-items: center;
    gap: 8px;
    cursor: pointer;
    font-size: 13px;
    color: var(--text-primary);
}

.btn {
    padding: 8px 16px;
    border-radius: 6px;
    font-size: 13px;
    font-weight: 500;
    cursor: pointer;
    border: 1px solid transparent;
    transition: all 0.2s;
}

.btn-primary {
    background: var(--accent-primary);
    color: white;
    border-color: var(--accent-primary);
}

.btn-primary:hover {
    filter: brightness(1.05);
}

.btn-secondary {
    background: var(--bg-secondary);
    border-color: var(--border-color);
    color: var(--text-primary);
}

.btn-secondary:hover {
    background: var(--bg-hover);
}

.btn-danger {
    background: #ef4444;
    color: white;
    border-color: #ef4444;
}

.btn-danger:hover {
    background: #dc2626;
}

.btn-small {
    padding: 4px 8px;
    font-size: 12px;
}

@media (max-width: 1024px) {
  .canvas-container {
    flex-direction: column;
    height: auto;
    gap: 8px;
    padding: 8px;
  }
  .canvas-sidebar {
    width: 100%;
    max-height: 200px;
    margin-bottom: 0;
    border-radius: 8px;
  }
  .canvas-main-area {
    min-height: 400px;
    flex: 1;
  }
  .canvas-sidebar-header {
    padding: 12px;
  }
  .canvas-board-search {
    padding: 8px 12px;
  }
  .canvas-tag-filter {
    padding: 8px 12px;
  }
  .canvas-boards-list {
    max-height: 120px;
  }
}

@media (max-width: 768px) {
  .canvas-container {
    padding: 4px;
    gap: 4px;
  }
  .canvas-sidebar {
    width: 100%;
    max-height: 180px;
    margin-bottom: 0;
  }
  .canvas-main-area {
    min-height: 350px;
  }
  .canvas-toolbar-compact {
    padding: 8px;
  }
  .canvas-toolbar-btn-compact {
    padding: 6px 8px;
    font-size: 11px;
    height: 32px;
    gap: 4px;
  }
  .canvas-toolbar-btn-compact .icon svg {
    width: 18px;
    height: 18px;
  }
  .canvas-drawing-tools {
    flex-direction: column;
    gap: 8px;
    align-items: stretch;
    padding: 8px;
  }
  .canvas-tool-section {
    justify-content: space-between;
  }
  .canvas-status-bar-compact {
    padding: 6px 8px;
    gap: 6px;
    font-size: 10px;
  }
  .canvas-empty-state-actions {
    flex-direction: column;
    align-items: center;
  }
  .canvas-empty-state-compact {
    padding: 16px;
  }
  .canvas-empty-state-compact h3 {
    font-size: 16px;
  }
  .canvas-board-item {
    padding: 8px;
  }
  .canvas-board-name {
    font-size: 13px;
  }
  .canvas-board-date {
    font-size: 10px;
  }
  .canvas-board-actions {
    margin-top: 6px;
  }
  .btn-icon {
    width: 24px;
    height: 24px;
  }
  .tag-filter-select {
    font-size: 12px;
    padding: 6px 10px;
  }
  .canvas-board-search .form-input {
    font-size: 12px;
    padding: 6px 10px;
  }
}

@media (max-width: 480px) {
  .canvas-sidebar {
    max-height: 160px;
  }
  .canvas-main-area {
    min-height: 300px;
  }
  .canvas-toolbar-group-compact {
    gap: 4px;
  }
  .canvas-toolbar-btn-compact {
    padding: 4px 6px;
    font-size: 10px;
    height: 28px;
  }
  .canvas-toolbar-btn-compact .icon svg {
    width: 16px;
    height: 16px;
  }
  .canvas-status-bar-compact span {
    font-size: 9px;
  }
  .canvas-boards-list {
    max-height: 100px;
  }
}