:root {
  --bg-primary: #090d16;
  --bg-secondary: #0f172a;
  --bg-panel: #1e293b;
  --bg-input: #0b1120;
  --border-color: rgba(148, 163, 184, 0.15);
  --border-focus: #06b6d4;
  
  --text-main: #f8fafc;
  --text-muted: #94a3b8;
  --text-dim: #64748b;

  --accent-cyan: #06b6d4;
  --accent-blue: #3b82f6;
  --accent-emerald: #10b981;
  --accent-amber: #f59e0b;
  --accent-rose: #f43f5e;
  --accent-violet: #8b5cf6;

  --font-sans: 'Outfit', 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', Consolas, monospace;
}

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

body {
  background-color: var(--bg-primary);
  color: var(--text-main);
  font-family: var(--font-sans);
  height: 100vh;
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

/* Top Toolbar */
header.studio-toolbar {
  height: 52px;
  background: var(--bg-secondary);
  border-bottom: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 16px;
  user-select: none;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  font-size: 1.1rem;
}

.brand-badge {
  background: linear-gradient(135deg, var(--accent-cyan), var(--accent-blue));
  padding: 4px 8px;
  border-radius: 6px;
  font-size: 0.8rem;
  color: #fff;
}

.toolbar-actions {
  display: flex;
  align-items: center;
  gap: 8px;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 12px;
  border-radius: 6px;
  font-family: inherit;
  font-size: 0.8rem;
  font-weight: 600;
  cursor: pointer;
  border: 1px solid transparent;
  transition: all 0.15s;
  background: rgba(255, 255, 255, 0.05);
  color: var(--text-main);
}
.btn:hover { background: rgba(255, 255, 255, 0.1); }
.btn-primary { background: linear-gradient(135deg, var(--accent-cyan), var(--accent-blue)); color: #fff; }
.btn-success { background: rgba(16, 185, 129, 0.2); color: var(--accent-emerald); border-color: rgba(16, 185, 129, 0.4); }
.btn-warning { background: rgba(245, 158, 11, 0.2); color: var(--accent-amber); border-color: rgba(245, 158, 11, 0.4); }

/* Main Workbench Layout */
.workbench-container {
  flex: 1;
  display: grid;
  grid-template-columns: 240px 1fr 480px;
  grid-template-rows: 1fr 200px;
  grid-template-areas:
    "sidebar center inspector"
    "sidebar bottom inspector";
  overflow: hidden;
  transition: grid-template-columns 0.2s ease;
}

.workbench-container.focus-mirror {
  grid-template-columns: 200px 38% 1fr;
}

/* Sidebar */
aside.studio-sidebar {
  grid-area: sidebar;
  background: var(--bg-secondary);
  border-right: 1px solid var(--border-color);
  display: flex;
  flex-direction: column;
}

.sidebar-tabs {
  display: flex;
  border-bottom: 1px solid var(--border-color);
}
.sidebar-tab {
  flex: 1;
  text-align: center;
  padding: 10px;
  font-size: 0.8rem;
  font-weight: 600;
  cursor: pointer;
  color: var(--text-muted);
  border-bottom: 2px solid transparent;
}
.sidebar-tab.active {
  color: var(--accent-cyan);
  border-bottom-color: var(--accent-cyan);
  background: rgba(6, 182, 212, 0.05);
}

.sidebar-content {
  flex: 1;
  overflow-y: auto;
  padding: 12px;
}

.tree-item {
  padding: 6px 8px;
  border-radius: 4px;
  cursor: pointer;
  font-size: 0.8rem;
  display: flex;
  align-items: center;
  gap: 6px;
  color: var(--text-muted);
}
.tree-item:hover { background: rgba(255, 255, 255, 0.04); color: var(--text-main); }
.tree-item.active { background: rgba(6, 182, 212, 0.15); color: var(--accent-cyan); }

.keyword-card {
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--border-color);
  border-radius: 6px;
  padding: 10px;
  margin-bottom: 8px;
  cursor: pointer;
  transition: border-color 0.15s;
}
.keyword-card:hover { border-color: var(--accent-cyan); }
.kw-title { font-weight: 600; font-size: 0.8rem; color: #fff; }
.kw-cat { font-size: 0.65rem; color: var(--accent-cyan); text-transform: uppercase; }
.kw-doc { font-size: 0.75rem; color: var(--text-muted); margin-top: 4px; }

/* Center Panel */
main.studio-center {
  grid-area: center;
  background: var(--bg-primary);
  display: flex;
  flex-direction: column;
  border-right: 1px solid var(--border-color);
}

.center-editor-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 10px 16px;
  background: var(--bg-secondary);
  border-bottom: 1px solid var(--border-color);
}

/* Code Editor Textarea */
.editor-wrapper {
  flex: 1;
  display: flex;
  position: relative;
}
textarea.code-editor {
  flex: 1;
  background: var(--bg-primary);
  color: #e2e8f0;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  line-height: 1.6;
  padding: 16px;
  border: none;
  outline: none;
  resize: none;
  tab-size: 2;
}

.diagnostics-bar {
  background: rgba(15, 23, 42, 0.9);
  border-top: 1px solid var(--border-color);
  padding: 8px 16px;
  font-size: 0.75rem;
  display: flex;
  align-items: center;
  gap: 12px;
}

/* Right Panel: Inspector */
aside.studio-inspector {
  grid-area: inspector;
  background: var(--bg-secondary);
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

.inspector-header {
  padding: 10px 14px;
  border-bottom: 1px solid var(--border-color);
  font-size: 0.85rem;
  font-weight: 600;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.screen-container {
  padding: 12px;
  display: flex;
  flex-direction: column;
  align-items: center;
  background: #020617;
  position: relative;
  overflow: hidden;
}

.screen-mirror-wrapper {
  position: relative;
  width: 100%;
  border: 1px solid var(--border-color);
  border-radius: 8px;
  overflow: hidden;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.5);
  background: #000;
}

.screen-mirror-img {
  width: 100%;
  height: auto;
  display: block;
}

.screen-canvas-overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  cursor: crosshair;
}

.node-details {
  flex: 1;
  overflow-y: auto;
  padding: 12px;
  font-size: 0.8rem;
}

.detail-row {
  margin-bottom: 8px;
}
.detail-label {
  font-size: 0.7rem;
  color: var(--text-dim);
  text-transform: uppercase;
}
.detail-value {
  color: var(--accent-cyan);
  font-family: var(--font-mono);
  word-break: break-all;
}

/* Bottom Panel: Debug & Logs */
section.studio-bottom {
  grid-area: bottom;
  background: var(--bg-secondary);
  border-top: 1px solid var(--border-color);
  border-right: 1px solid var(--border-color);
  display: flex;
  flex-direction: column;
}

.console-header {
  padding: 6px 14px;
  border-bottom: 1px solid var(--border-color);
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--text-muted);
  display: flex;
  justify-content: space-between;
}

.console-output {
  flex: 1;
  overflow-y: auto;
  padding: 8px 14px;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: #cbd5e1;
}

.log-pass { color: var(--accent-emerald); }
.log-fail { color: var(--accent-rose); font-weight: 700; }
.log-info { color: var(--accent-cyan); }

/* CAN Simulator Controls */
.can-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 12px;
  padding: 16px;
  overflow-y: auto;
}

.can-card {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  padding: 14px;
}

.can-slider {
  width: 100%;
  margin: 10px 0;
  accent-color: var(--accent-cyan);
}