:root {
  --bg-dark: #12161f;
  --bg-panel: #1a202c;
  --bg-card: #222b3c;
  --bg-card-hover: #2b364c;
  --border-color: #2e3a50;
  --text-main: #e2e8f0;
  --text-muted: #94a3b8;
  --accent: #3b82f6;
  --accent-hover: #2563eb;
  --unmapped-pulse: #f59f00;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  padding: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  background-color: var(--bg-dark);
  color: var(--text-main);
  height: 100vh;
  overflow: hidden;
  display: flex;
  flex-direction: column;
}

/* Header */
.app-header {
  height: 56px;
  background-color: var(--bg-panel);
  border-bottom: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 16px;
  z-index: 100;
  flex-shrink: 0;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  font-size: 1.1rem;
  letter-spacing: -0.5px;
}

.brand-icon {
  color: #fab005;
  font-size: 1.3rem;
}

.progress-container {
  display: flex;
  align-items: center;
  gap: 12px;
  background: var(--bg-card);
  padding: 4px 12px;
  border-radius: 20px;
  border: 1px solid var(--border-color);
}

.progress-bar-wrap {
  width: 140px;
  height: 8px;
  background: #334155;
  border-radius: 4px;
  overflow: hidden;
}

.progress-fill {
  height: 100%;
  background: linear-gradient(90deg, #10b981, #3b82f6);
  width: 0%;
  transition: width 0.3s ease;
}

.progress-text {
  font-size: 0.8rem;
  color: var(--text-muted);
  font-weight: 600;
}

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

/* App Main Body */
.app-body {
  flex: 1;
  display: flex;
  overflow: hidden;
  position: relative;
}

/* Left Canvas Area */
.canvas-panel {
  flex: 1;
  position: relative;
  background: #0f131a;
  overflow: hidden;
  display: flex;
  flex-direction: column;
}

.canvas-toolbar {
  position: absolute;
  top: 14px;
  left: 14px;
  z-index: 20;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  background: rgba(26, 32, 44, 0.92);
  backdrop-filter: blur(8px);
  padding: 6px 10px;
  border-radius: 8px;
  border: 1px solid var(--border-color);
  box-shadow: 0 4px 16px rgba(0,0,0,0.3);
}

.active-painter-badge {
  display: none;
  align-items: center;
  gap: 8px;
  padding: 4px 10px;
  border-radius: 6px;
  font-size: 0.85rem;
  font-weight: 600;
  color: #fff;
  background: #1c7ed6;
  border: 1px solid rgba(255,255,255,0.2);
  box-shadow: 0 0 12px rgba(28, 126, 214, 0.5);
  animation: pulse-border 2s infinite;
}

@keyframes pulse-border {
  0% { box-shadow: 0 0 0 0 rgba(28, 126, 214, 0.6); }
  70% { box-shadow: 0 0 0 8px rgba(28, 126, 214, 0); }
  100% { box-shadow: 0 0 0 0 rgba(28, 126, 214, 0); }
}

.active-painter-badge.active {
  display: flex;
}

.svg-viewport {
  width: 100%;
  height: 100%;
  cursor: grab;
}

.svg-viewport:active {
  cursor: grabbing;
}

.svg-viewport.painter-cursor {
  cursor: crosshair;
}

/* Right Sidebar */
.sidebar {
  width: 440px;
  background-color: var(--bg-panel);
  border-left: 1px solid var(--border-color);
  display: flex;
  flex-direction: column;
  overflow: hidden;
  flex-shrink: 0;
  z-index: 30;
}

.sidebar-tabs {
  display: flex;
  background: var(--bg-dark);
  border-bottom: 1px solid var(--border-color);
}

.sidebar-tab {
  flex: 1;
  padding: 10px 14px;
  background: none;
  border: none;
  color: var(--text-muted);
  font-weight: 600;
  font-size: 0.88rem;
  cursor: pointer;
  border-bottom: 2px solid transparent;
  transition: all 0.2s;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
}

.sidebar-tab.active {
  color: #fff;
  border-bottom-color: var(--accent);
  background: var(--bg-panel);
}

.sidebar-content {
  flex: 1;
  overflow-y: auto;
  padding: 14px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

/* Panel Header Card */
.panel-info-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  padding: 12px 14px;
}

.panel-title {
  font-weight: 700;
  font-size: 0.95rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.panel-subtitle {
  font-size: 0.78rem;
  color: var(--text-muted);
  margin-top: 2px;
}

/* Breakers Grid */
.breakers-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
}

.breaker-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 6px;
  padding: 8px 10px;
  cursor: pointer;
  transition: all 0.15s ease;
  position: relative;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  min-height: 74px;
  user-select: none;
}

.breaker-card:hover {
  background: var(--bg-card-hover);
  border-color: #475569;
  transform: translateY(-1px);
}

.breaker-card.selected-painter {
  border-color: #fff;
  box-shadow: 0 0 12px rgba(255, 255, 255, 0.4);
}

.breaker-card.highlighted-filter {
  outline: 2px solid #38bdf8;
}

.breaker-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 4px;
}

.breaker-tag {
  font-weight: 800;
  font-size: 0.95rem;
  padding: 1px 6px;
  border-radius: 4px;
  color: #fff;
  letter-spacing: -0.3px;
}

.breaker-meta {
  display: flex;
  align-items: center;
  gap: 4px;
  font-size: 0.72rem;
  font-weight: 600;
  color: var(--text-muted);
}

.breaker-desc {
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--text-main);
  line-height: 1.25;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.breaker-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-top: 6px;
  font-size: 0.72rem;
}

.device-badge {
  background: rgba(255, 255, 255, 0.1);
  padding: 2px 6px;
  border-radius: 10px;
  font-weight: 600;
}

/* Device Inspector Footer Card */
.device-inspector-panel {
  background: var(--bg-card);
  border-top: 1px solid var(--border-color);
  padding: 14px;
  flex-shrink: 0;
}

.inspector-title {
  font-size: 0.88rem;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 10px;
}

.inspector-field {
  margin-bottom: 8px;
}

.inspector-field label {
  font-size: 0.75rem;
  color: var(--text-muted);
  display: block;
  margin-bottom: 3px;
  font-weight: 600;
}

/* Buttons and Controls */
.btn-tool {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  color: var(--text-main);
  padding: 5px 10px;
  border-radius: 6px;
  font-size: 0.82rem;
  font-weight: 600;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  transition: all 0.15s;
}

.btn-tool:hover {
  background: var(--bg-card-hover);
  color: #fff;
  border-color: #475569;
}

.btn-tool.active {
  background: var(--accent);
  color: #fff;
  border-color: var(--accent);
}

.btn-tool.btn-primary {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
}

.btn-tool.btn-primary:hover {
  background: var(--accent-hover);
}

.btn-tool.btn-danger {
  background: #e03131;
  border-color: #e03131;
  color: #fff;
}

.btn-tool.btn-danger:hover {
  background: #c92a2a;
}

.form-select, .form-input {
  background: #0f131a;
  border: 1px solid var(--border-color);
  color: #fff;
  padding: 6px 10px;
  border-radius: 6px;
  font-size: 0.82rem;
  width: 100%;
}

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

/* SVG Stylings */
.svg-room {
  fill: #141a24;
  stroke: #334155;
  stroke-width: 2px;
  transition: fill 0.2s, stroke 0.2s;
}

.svg-room:hover {
  fill: #1a2332;
  stroke: #475569;
}

.svg-room-label {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  font-size: 32px;
  font-weight: 700;
  fill: #64748b;
  text-anchor: middle;
  pointer-events: none;
  user-select: none;
}

.svg-subpanel-boundary {
  fill: rgba(59, 130, 246, 0.05);
  stroke: #3b82f6;
  stroke-width: 3px;
  stroke-dasharray: 8 6;
  pointer-events: none;
}

.svg-subpanel-tag {
  font-size: 44px;
  font-weight: 800;
  fill: #60a5fa;
  pointer-events: none;
  text-anchor: middle;
}

/* Device node hover & selection */
.svg-device {
  cursor: pointer;
  transition: transform 0.15s ease, filter 0.15s ease;
}

.svg-device:hover {
  filter: drop-shadow(0 0 10px rgba(255, 255, 255, 0.8));
}

.svg-device.selected {
  filter: drop-shadow(0 0 14px #38bdf8);
}

.svg-device.dimmed {
  opacity: 0.15;
}

.svg-unmapped-halo {
  animation: pulse-ring 2s infinite;
  pointer-events: none;
}

@keyframes pulse-ring {
  0% { opacity: 0.8; transform: scale(1); }
  50% { opacity: 0.3; transform: scale(1.3); }
  100% { opacity: 0.8; transform: scale(1); }
}

.svg-breaker-badge {
  font-size: 20px;
  font-weight: 800;
  font-family: sans-serif;
  fill: #ffffff;
  text-anchor: middle;
  dominant-baseline: central;
  pointer-events: none;
  user-select: none;
}

.svg-circuit-line {
  fill: none;
  stroke-width: 4px;
  stroke-linecap: round;
  stroke-linejoin: round;
  stroke-dasharray: 8 6;
  pointer-events: none;
}

/* Selection Box */
.selection-box {
  position: absolute;
  border: 1px dashed #38bdf8;
  background-color: rgba(56, 189, 248, 0.15);
  pointer-events: none;
  z-index: 1000;
}

/* Tooltip */
.device-tooltip {
  position: absolute;
  background: rgba(15, 23, 42, 0.95);
  border: 1px solid #334155;
  border-radius: 6px;
  padding: 8px 12px;
  font-size: 0.8rem;
  color: #fff;
  pointer-events: none;
  z-index: 2000;
  display: none;
  box-shadow: 0 8px 24px rgba(0,0,0,0.5);
}