:root {
  --bg: var(--vscode-editor-background, #1e1e1e);
  --fg: var(--vscode-editor-foreground, #cccccc);
  --sidebar-bg: var(--vscode-sideBar-background, #252526);
  --border: var(--vscode-panel-border, #3c3c3c);
  --input-bg: var(--vscode-input-background, #3c3c3c);
  --input-fg: var(--vscode-input-foreground, #cccccc);
  --input-border: var(--vscode-input-border, #5a5a5a);
  --button-bg: var(--vscode-button-background, #0e639c);
  --button-fg: var(--vscode-button-foreground, #ffffff);
  --button-hover: var(--vscode-button-hoverBackground, #1177bb);
  --button-secondary-bg: var(--vscode-button-secondaryBackground, #3a3d41);
  --button-secondary-fg: var(--vscode-button-secondaryForeground, #cccccc);
  --highlight: var(--vscode-list-activeSelectionBackground, #094771);
  --highlight-fg: var(--vscode-list-activeSelectionForeground, #ffffff);
  --hover: var(--vscode-list-hoverBackground, #2a2d2e);
  --focus-border: var(--vscode-focusBorder, #007fd4);
  --badge-bg: var(--vscode-badge-background, #4d4d4d);
  --badge-fg: var(--vscode-badge-foreground, #cccccc);

  /* Entity colors */
  --entity-bg: #2d2d30;
  --entity-border: #555;
  --entity-header-bg: #264f78;
  --entity-header-fg: #e0e0e0;
  --entity-hover-border: #007fd4;
  --entity-selected-border: #007fd4;
  --entity-fk-color: #569cd6;
  --entity-pk-color: #dcdcaa;
  --entity-type-color: #4ec9b0;
  --entity-required-color: #ce9178;

  /* Relationship colors */
  --rel-belongs-to: #569cd6;
  --rel-has-many: #4ec9b0;
  --rel-has-one: #dcdcaa;

  /* Base class / enum colors */
  --base-header-bg: #4a3060;
  --enum-header-bg: #305040;
}

* { box-sizing: border-box; margin: 0; padding: 0; }

body {
  background: var(--bg);
  color: var(--fg);
  font-family: var(--vscode-font-family, 'Segoe UI', sans-serif);
  font-size: 13px;
  height: 100vh;
  overflow: hidden;
  user-select: none;
}

/* Toolbar */
#toolbar {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 6px 12px;
  border-bottom: 1px solid var(--border);
  background: var(--sidebar-bg);
  z-index: 100;
  position: relative;
}

#file-name { opacity: 0.7; font-size: 12px; }
.toolbar-spacer { flex: 1; }

.toolbar-group {
  display: flex;
  align-items: center;
  gap: 4px;
}

.layout-label {
  font-size: 11px;
  opacity: 0.7;
}

#toolbar button {
  background: var(--button-secondary-bg);
  color: var(--button-secondary-fg);
  border: none;
  padding: 3px 10px;
  cursor: pointer;
  border-radius: 3px;
  font-size: 12px;
}
#toolbar button:hover { background: var(--button-hover); color: var(--button-fg); }
#toolbar button.active {
  background: var(--button-bg);
  color: var(--button-fg);
}

#zoom-level {
  font-size: 11px;
  min-width: 40px;
  text-align: center;
  opacity: 0.8;
}

#toolbar select,
#toolbar input[type="text"] {
  background: var(--input-bg);
  color: var(--input-fg);
  border: 1px solid var(--input-border);
  padding: 3px 8px;
  border-radius: 3px;
  font-size: 12px;
}
#search-input { width: 160px; }
#search-input:focus { outline: 1px solid var(--focus-border); }

/* Main area: filter panel + canvas side by side */
#main-area {
  display: flex;
  flex: 1;
  overflow: hidden;
  height: calc(100vh - 38px);
}

/* Filter panel */
#filter-panel {
  display: flex;
  flex-direction: column;
  width: 220px;
  min-width: 220px;
  background: var(--sidebar-bg);
  border-right: 1px solid var(--border);
  overflow: hidden;
  transition: width 0.15s, min-width 0.15s;
}
#filter-panel.collapsed {
  width: 36px;
  min-width: 36px;
}
#filter-panel.collapsed #filter-body { display: none; }

#filter-header {
  display: flex;
  align-items: center;
  padding: 4px;
  border-bottom: 1px solid var(--border);
}
#filter-header button {
  width: 100%;
  text-align: left;
  background: none;
  color: var(--fg);
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  padding: 4px 6px;
  cursor: pointer;
}
#filter-header button:hover { background: var(--hover); }

#filter-body {
  display: flex;
  flex-direction: column;
  flex: 1;
  overflow: hidden;
}

#filter-actions {
  display: flex;
  gap: 3px;
  padding: 6px;
  border-bottom: 1px solid var(--border);
  flex-wrap: wrap;
}
#filter-actions button {
  background: var(--button-secondary-bg);
  color: var(--button-secondary-fg);
  border: none;
  padding: 2px 8px;
  font-size: 11px;
  cursor: pointer;
  border-radius: 3px;
}
#filter-actions button:hover { background: var(--button-hover); color: var(--button-fg); }

#filter-search {
  margin: 6px;
  background: var(--input-bg);
  color: var(--input-fg);
  border: 1px solid var(--input-border);
  padding: 4px 8px;
  border-radius: 3px;
  font-size: 12px;
}
#filter-search:focus { outline: 1px solid var(--focus-border); }

#filter-sections {
  flex: 1;
  overflow-y: auto;
  padding: 0 4px 8px;
}

.filter-section-title {
  font-size: 10px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  opacity: 0.6;
  padding: 8px 4px 3px;
}

.filter-item {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 2px 4px;
  border-radius: 3px;
  cursor: pointer;
  font-size: 12px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.filter-item:hover { background: var(--hover); }
.filter-item.hidden-by-search { display: none; }

.filter-item input[type="checkbox"] {
  width: 14px;
  height: 14px;
  cursor: pointer;
  flex-shrink: 0;
}

.filter-item label {
  cursor: pointer;
  overflow: hidden;
  text-overflow: ellipsis;
}

.filter-item .filter-badge {
  font-size: 9px;
  background: var(--badge-bg);
  color: var(--badge-fg);
  padding: 0 4px;
  border-radius: 3px;
  margin-left: auto;
  flex-shrink: 0;
}

/* Canvas container */
#canvas-container {
  position: relative;
  flex: 1;
  overflow: hidden;
  cursor: grab;
}
#canvas-container.dragging { cursor: grabbing; }
#canvas-container.entity-dragging { cursor: grabbing; }

/* World layer – single transform target for both SVG and entity cards */
#world {
  position: absolute;
  top: 0;
  left: 0;
  transform-origin: 0 0;
  /* width/height are irrelevant; children are absolutely positioned */
}

/* SVG layer for relationship lines */
#rel-svg {
  position: absolute;
  top: 0;
  left: 0;
  width: 1px;
  height: 1px;
  overflow: visible;
  pointer-events: none;
  z-index: 1;
}

#rel-svg path {
  pointer-events: stroke;
  cursor: pointer;
}

/* Entities layer */
#entities-layer {
  position: absolute;
  top: 0;
  left: 0;
  z-index: 2;
}

/* Entity card */
.entity-card {
  position: absolute;
  background: var(--entity-bg);
  border: 1px solid var(--entity-border);
  border-radius: 5px;
  min-width: 200px;
  max-width: 320px;
  box-shadow: 0 2px 8px rgba(0,0,0,0.3);
  cursor: move;
  transition: box-shadow 0.15s;
  overflow: hidden;
}
.entity-card:hover {
  border-color: var(--entity-hover-border);
  box-shadow: 0 4px 16px rgba(0,0,0,0.5);
}
.entity-card.selected {
  border-color: var(--entity-selected-border);
  border-width: 2px;
  box-shadow: 0 0 12px rgba(0,127,212,0.3);
}
.entity-card.highlight {
  border-color: #e0a030;
  box-shadow: 0 0 16px rgba(224,160,48,0.4);
}
.entity-card.dimmed {
  opacity: 0.3;
}
.entity-card.path-start {
  border-color: #f0c040;
  box-shadow: 0 0 0 2px #f0c040, 0 0 16px #f0c04066;
}
.entity-card.search-match {
  border-color: #e0a030;
  box-shadow: 0 0 12px rgba(224,160,48,0.3);
}

/* Entity header */
.entity-header {
  background: var(--entity-header-bg);
  color: var(--entity-header-fg);
  padding: 6px 10px;
  font-weight: 600;
  font-size: 13px;
  display: flex;
  align-items: center;
  gap: 6px;
  white-space: nowrap;
}
.entity-card[data-kind="baseclass"] .entity-header { background: var(--base-header-bg); }
.entity-card[data-kind="enum"] .entity-header { background: var(--enum-header-bg); }

.entity-header .entity-badge {
  font-size: 9px;
  background: rgba(255,255,255,0.15);
  padding: 1px 5px;
  border-radius: 3px;
  font-weight: 400;
  margin-left: auto;
}

.entity-header .collapse-btn {
  background: none;
  border: none;
  color: inherit;
  cursor: pointer;
  font-size: 10px;
  padding: 0 2px;
  opacity: 0.6;
}
.entity-header .collapse-btn:hover { opacity: 1; }

/* Entity body (properties) */
.entity-body {
  padding: 4px 0;
  max-height: 300px;
  overflow-y: auto;
  cursor: default;
}
.entity-card.collapsed .entity-body { display: none; }

.entity-prop {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 2px 10px;
  font-size: 12px;
  font-family: var(--vscode-editor-font-family, 'Consolas', monospace);
  white-space: nowrap;
  cursor: default;
}
.entity-prop:hover { background: var(--hover); }

.prop-icon {
  width: 14px;
  text-align: center;
  flex-shrink: 0;
  font-size: 10px;
}
.prop-icon.pk { color: var(--entity-pk-color); }
.prop-icon.fk { color: var(--entity-fk-color); }

.prop-name {
  flex: 1;
  overflow: hidden;
  text-overflow: ellipsis;
  min-width: 0;
}
.prop-name.required { color: var(--entity-required-color); }

.prop-type {
  color: var(--entity-type-color);
  font-size: 11px;
  opacity: 0.8;
}

/* Relationship line hover highlight */
.rel-line {
  stroke-width: 1.5;
  fill: none;
  transition: stroke-width 0.1s;
}
.rel-line:hover,
.rel-line.hovered {
  stroke-width: 3;
}
.rel-line.belongs-to { stroke: var(--rel-belongs-to); }
.rel-line.has-many { stroke: var(--rel-has-many); stroke-dasharray: 6 3; }
.rel-line.has-one { stroke: var(--rel-has-one); stroke-dasharray: 2 3; }

.rel-line.highlighted {
  stroke-width: 3;
  filter: drop-shadow(0 0 4px currentColor);
}
.rel-line.dimmed {
  opacity: 0.1;
}
.rel-line.path-edge {
  stroke: #f0c040 !important;
  stroke-width: 3;
  filter: drop-shadow(0 0 6px #f0c04088);
}

/* Relationship markers */
.rel-marker text {
  font-size: 10px;
  fill: var(--fg);
  opacity: 0.6;
}

/* Context menu */
.context-menu {
  position: fixed;
  background: var(--sidebar-bg, #252526);
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 4px 0;
  min-width: 180px;
  z-index: 2000;
  box-shadow: 0 4px 16px rgba(0,0,0,0.6);
  font-size: 12px;
}
.context-menu-item {
  padding: 5px 16px;
  cursor: pointer;
  white-space: nowrap;
}
.context-menu-item:hover {
  background: var(--highlight);
  color: var(--highlight-fg);
}
.context-menu-sep {
  height: 1px;
  background: var(--border);
  margin: 4px 8px;
}

/* Tooltip */
#tooltip {
  position: fixed;
  background: #1e1e1e;
  border: 1px solid var(--border);
  padding: 8px 12px;
  border-radius: 4px;
  font-size: 12px;
  z-index: 1000;
  pointer-events: none;
  box-shadow: 0 4px 12px rgba(0,0,0,0.5);
  max-width: 350px;
}
#tooltip.hidden { display: none; }
#tooltip .tt-title { font-weight: 600; margin-bottom: 4px; color: var(--entity-type-color); }
#tooltip .tt-row { display: flex; gap: 8px; padding: 1px 0; }
#tooltip .tt-label { opacity: 0.6; min-width: 80px; }
#tooltip .tt-value { color: var(--fg); }

/* Minimap */
#minimap {
  position: absolute;
  bottom: 12px;
  right: 12px;
  width: 180px;
  height: 120px;
  background: rgba(30,30,30,0.85);
  border: 1px solid var(--border);
  border-radius: 4px;
  overflow: hidden;
  z-index: 50;
}

#minimap-canvas {
  width: 100%;
  height: 100%;
}

#minimap-viewport {
  position: absolute;
  border: 1px solid var(--focus-border);
  background: rgba(0,127,212,0.1);
  pointer-events: none;
}

/* Legend */
.legend {
  position: absolute;
  bottom: 12px;
  left: 12px;
  background: rgba(30,30,30,0.85);
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 8px 12px;
  font-size: 11px;
  z-index: 50;
}
.legend-item {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 2px 0;
}
.legend-line {
  width: 24px;
  height: 2px;
}
.legend-line.belongs-to { background: var(--rel-belongs-to); }
.legend-line.has-many { background: var(--rel-has-many); background-image: repeating-linear-gradient(90deg, var(--rel-has-many) 0 6px, transparent 6px 9px); background-color: transparent; height: 2px; }
.legend-line.has-one { background: var(--rel-has-one); background-image: repeating-linear-gradient(90deg, var(--rel-has-one) 0 2px, transparent 2px 5px); background-color: transparent; height: 2px; }

/* Scrollbars */
::-webkit-scrollbar { width: 6px; height: 6px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--badge-bg); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: #666; }

/* Path-find toast notification */
.diagram-toast {
  position: absolute;
  bottom: 24px;
  left: 50%;
  transform: translateX(-50%);
  background: #3a3a3a;
  color: #f0c040;
  border: 1px solid #f0c04066;
  border-radius: 6px;
  padding: 8px 16px;
  font-size: 13px;
  pointer-events: none;
  z-index: 1000;
  animation: toast-fade 3s forwards;
}
@keyframes toast-fade {
  0%   { opacity: 1; }
  70%  { opacity: 1; }
  100% { opacity: 0; }
}