/* ===== CSS Reset & Variables ===== */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

:root {
  /* Colors */
  --bg-primary: #0f0d1a;
  --bg-secondary: #1a1726;
  --bg-tertiary: #221f33;
  --bg-card: #252240;
  --bg-card-hover: #2e2a4a;
  
  --surface-1: #2a2640;
  --surface-2: #332f4d;
  --surface-3: #3d3860;
  
  --border-subtle: rgba(255, 255, 255, 0.06);
  --border-default: rgba(255, 255, 255, 0.1);
  --border-strong: rgba(255, 255, 255, 0.15);
  
  --text-primary: #f0eef6;
  --text-secondary: #a8a3be;
  --text-tertiary: #7a7494;
  --text-muted: #5c5678;
  
  --accent-primary: #6366f1;
  --accent-primary-hover: #818cf8;
  --accent-secondary: #a855f7;
  --accent-tertiary: #ec4899;
  
  --success: #34d399;
  --success-bg: rgba(52, 211, 153, 0.1);
  --warning: #fbbf24;
  --warning-bg: rgba(251, 191, 36, 0.1);
  --danger: #f87171;
  --danger-bg: rgba(248, 113, 113, 0.1);
  --info: #60a5fa;
  --info-bg: rgba(96, 165, 250, 0.1);
  
  /* Typography */
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', monospace;
  
  /* Spacing */
  --space-xs: 4px;
  --space-sm: 8px;
  --space-md: 12px;
  --space-lg: 16px;
  --space-xl: 24px;
  --space-2xl: 32px;
  --space-3xl: 48px;
  
  /* Radius */
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 14px;
  --radius-xl: 20px;
  
  /* Shadows */
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.3), 0 1px 2px rgba(0,0,0,0.2);
  --shadow-md: 0 4px 6px rgba(0,0,0,0.3), 0 2px 4px rgba(0,0,0,0.2);
  --shadow-lg: 0 10px 30px rgba(0,0,0,0.4);
  --shadow-xl: 0 20px 50px rgba(0,0,0,0.5);
  
  /* Transitions */
  --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-normal: 250ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 400ms cubic-bezier(0.4, 0, 0.2, 1);
  
  /* Layout */
  --header-height: 64px;
  --panel-width: 340px;
}

html {
  font-size: 14px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-sans);
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.5;
  overflow: hidden;
  height: 100vh;
}

/* ===== Layout ===== */
.app-container {
  display: flex;
  flex-direction: column;
  height: 100vh;
  overflow: hidden;
}

/* ===== Header ===== */
.app-header {
  height: var(--header-height);
  background: rgba(26, 23, 38, 0.8);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border-subtle);
  z-index: 100;
  flex-shrink: 0;
}

.header-content {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
  padding: 0 var(--space-xl);
}

.logo-section {
  display: flex;
  align-items: center;
  gap: var(--space-md);
}

.logo-icon {
  width: 42px;
  height: 42px;
  background: rgba(99, 102, 241, 0.1);
  border: 1px solid rgba(99, 102, 241, 0.2);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
}

.logo-text h1 {
  font-size: 1.15rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  background: linear-gradient(135deg, #e0e7ff, #a5b4fc);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.logo-text .subtitle {
  font-size: 0.75rem;
  color: var(--text-tertiary);
  font-weight: 400;
  margin-top: 1px;
}

.header-actions {
  display: flex;
  gap: var(--space-sm);
}

/* ===== Buttons ===== */
.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-sm);
  padding: var(--space-sm) var(--space-lg);
  border: none;
  border-radius: var(--radius-sm);
  font-family: var(--font-sans);
  font-size: 0.82rem;
  font-weight: 500;
  cursor: pointer;
  transition: all var(--transition-fast);
  white-space: nowrap;
}

.btn-primary {
  background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
  color: white;
  box-shadow: 0 2px 12px rgba(99, 102, 241, 0.3);
}

.btn-primary:hover {
  box-shadow: 0 4px 20px rgba(99, 102, 241, 0.5);
  transform: translateY(-1px);
}

.btn-ghost {
  background: transparent;
  color: var(--text-secondary);
  border: 1px solid var(--border-default);
}

.btn-ghost:hover {
  background: var(--surface-1);
  color: var(--text-primary);
  border-color: var(--border-strong);
}

/* ===== Main Content Layout ===== */
.main-content {
  display: flex;
  flex: 1;
  overflow: hidden;
  height: calc(100vh - var(--header-height));
}

/* ===== Side Panels ===== */
.controls-panel,
.specs-panel {
  width: var(--panel-width);
  flex-shrink: 0;
  background: var(--bg-secondary);
  border-right: 1px solid var(--border-subtle);
  overflow: hidden;
  display: flex;
  flex-direction: column;
}

.specs-panel {
  border-right: none;
  border-left: 1px solid var(--border-subtle);
}

.panel-scroll {
  overflow-y: auto;
  flex: 1;
  padding: var(--space-lg);
  scrollbar-width: thin;
  scrollbar-color: var(--surface-3) transparent;
}

.panel-scroll::-webkit-scrollbar {
  width: 5px;
}

.panel-scroll::-webkit-scrollbar-track {
  background: transparent;
}

.panel-scroll::-webkit-scrollbar-thumb {
  background: var(--surface-3);
  border-radius: 10px;
}

/* ===== Control Sections ===== */
.control-section,
.spec-section {
  margin-bottom: var(--space-xl);
}

.section-header {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  margin-bottom: var(--space-lg);
}

.section-icon {
  width: 32px;
  height: 32px;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
}

.cabinet-icon { background: rgba(99, 102, 241, 0.15); color: #818cf8; }
.install-icon { background: rgba(168, 85, 247, 0.15); color: #c084fc; }
.vent-icon { background: rgba(52, 211, 153, 0.15); color: #34d399; }
.view-icon { background: rgba(96, 165, 250, 0.15); color: #60a5fa; }
.calc-icon { background: rgba(251, 191, 36, 0.15); color: #fbbf24; }
.equip-icon { background: rgba(168, 85, 247, 0.15); color: #c084fc; }
.warn-icon { background: rgba(248, 113, 113, 0.15); color: #f87171; }

.section-header h2 {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

/* ===== Control Groups ===== */
.control-group {
  margin-bottom: var(--space-lg);
}

.control-group label {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  margin-bottom: var(--space-xs);
}

.label-text {
  font-size: 0.82rem;
  color: var(--text-secondary);
  font-weight: 400;
}

.label-value {
  font-family: var(--font-mono);
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--accent-primary-hover);
  min-width: 70px;
  text-align: right;
}

/* ===== Range Inputs ===== */
input[type="range"] {
  -webkit-appearance: none;
  appearance: none;
  width: 100%;
  height: 6px;
  border-radius: 3px;
  background: var(--surface-2);
  outline: none;
  cursor: pointer;
  margin: var(--space-sm) 0 var(--space-xs);
}

input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
  cursor: pointer;
  box-shadow: 0 2px 8px rgba(99, 102, 241, 0.4);
  transition: transform var(--transition-fast), box-shadow var(--transition-fast);
}

input[type="range"]::-webkit-slider-thumb:hover {
  transform: scale(1.15);
  box-shadow: 0 3px 14px rgba(99, 102, 241, 0.6);
}

input[type="range"]::-webkit-slider-thumb:active {
  transform: scale(1.25);
}

input[type="range"]::-moz-range-thumb {
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
  cursor: pointer;
  border: none;
  box-shadow: 0 2px 8px rgba(99, 102, 241, 0.4);
}

.range-limits {
  display: flex;
  justify-content: space-between;
  font-size: 0.7rem;
  color: var(--text-muted);
  font-family: var(--font-mono);
}

/* ===== View Toggle ===== */
.view-toggle-group {
  display: flex;
  gap: var(--space-xs);
  background: var(--surface-1);
  border-radius: var(--radius-sm);
  padding: 3px;
}

.view-btn {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 4px;
  padding: var(--space-sm) var(--space-md);
  border: none;
  border-radius: 4px;
  background: transparent;
  color: var(--text-tertiary);
  font-family: var(--font-sans);
  font-size: 0.75rem;
  font-weight: 500;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.view-btn:hover {
  color: var(--text-secondary);
  background: rgba(255,255,255,0.03);
}

.view-btn.active {
  background: var(--accent-primary);
  color: white;
  box-shadow: 0 2px 8px rgba(99, 102, 241, 0.3);
}

/* ===== Checkboxes ===== */
.checkbox-label {
  display: flex !important;
  align-items: center;
  gap: var(--space-sm);
  cursor: pointer;
  font-size: 0.82rem;
  color: var(--text-secondary);
  user-select: none;
}

.checkbox-label input[type="checkbox"] {
  display: none;
}

.checkmark {
  width: 18px;
  height: 18px;
  border: 2px solid var(--border-strong);
  border-radius: 4px;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition-fast);
  flex-shrink: 0;
}

.checkbox-label input[type="checkbox"]:checked + .checkmark {
  background: var(--accent-primary);
  border-color: var(--accent-primary);
}

.checkbox-label input[type="checkbox"]:checked + .checkmark::after {
  content: '';
  display: block;
  width: 5px;
  height: 9px;
  border: solid white;
  border-width: 0 2px 2px 0;
  transform: rotate(45deg) translateY(-1px);
}

/* ===== Visualization Panel ===== */
.visualization-panel {
  flex: 1;
  display: flex;
  flex-direction: column;
  background: var(--bg-primary);
  position: relative;
  overflow: hidden;
}

.viz-toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-sm) var(--space-lg);
  background: rgba(26, 23, 38, 0.6);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border-subtle);
  z-index: 10;
}

.viz-view-label {
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--text-secondary);
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}

.viz-view-label::before {
  content: '';
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--accent-primary);
  box-shadow: 0 0 8px var(--accent-primary);
}

.viz-zoom {
  display: flex;
  align-items: center;
  gap: var(--space-xs);
}

.zoom-btn {
  width: 32px;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  background: transparent;
  color: var(--text-tertiary);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.zoom-btn:hover {
  background: var(--surface-1);
  color: var(--text-primary);
  border-color: var(--border-default);
}

.zoom-value {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-tertiary);
  min-width: 40px;
  text-align: center;
}

.viz-canvas-wrapper {
  flex: 1;
  position: relative;
  overflow: hidden;
  cursor: grab;
}

.viz-canvas-wrapper:active {
  cursor: grabbing;
}

#vizCanvas {
  width: 100%;
  height: 100%;
  display: block;
}

/* ===== Alerts ===== */
.alerts-container {
  position: absolute;
  bottom: var(--space-lg);
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
  z-index: 20;
  pointer-events: none;
}

.alert {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  padding: var(--space-sm) var(--space-lg);
  border-radius: var(--radius-md);
  backdrop-filter: blur(16px);
  font-size: 0.8rem;
  font-weight: 500;
  animation: alertSlideIn 0.3s ease-out;
  white-space: nowrap;
}

.alert-warning {
  background: rgba(251, 191, 36, 0.15);
  border: 1px solid rgba(251, 191, 36, 0.3);
  color: var(--warning);
}

.alert-danger {
  background: rgba(248, 113, 113, 0.15);
  border: 1px solid rgba(248, 113, 113, 0.3);
  color: var(--danger);
}

.alert-success {
  background: rgba(52, 211, 153, 0.15);
  border: 1px solid rgba(52, 211, 153, 0.3);
  color: var(--success);
}

@keyframes alertSlideIn {
  from { transform: translateY(10px); opacity: 0; }
  to { transform: translateY(0); opacity: 1; }
}

/* ===== Specs Grid ===== */
.specs-grid {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

.spec-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--space-sm) var(--space-md);
  background: var(--surface-1);
  border-radius: var(--radius-sm);
  transition: background var(--transition-fast);
}

.spec-item:hover {
  background: var(--surface-2);
}

.spec-item .spec-label {
  font-size: 0.78rem;
  color: var(--text-secondary);
}

.spec-item .spec-value {
  font-family: var(--font-mono);
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--text-primary);
}

.spec-item .spec-value.good { color: var(--success); }
.spec-item .spec-value.warn { color: var(--warning); }
.spec-item .spec-value.bad { color: var(--danger); }

.spec-divider {
  height: 1px;
  background: var(--border-subtle);
  margin: var(--space-xs) 0;
}

/* ===== Equipment Cards ===== */
.equipment-cards {
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
}

.equip-card {
  background: var(--surface-1);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: var(--space-md);
  transition: all var(--transition-fast);
}

.equip-card:hover {
  border-color: var(--border-default);
  background: var(--surface-2);
}

.equip-header {
  margin-bottom: var(--space-sm);
}

.equip-tag {
  font-size: 0.65rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  padding: 2px 8px;
  border-radius: 4px;
}

.projector-tag { background: rgba(99, 102, 241, 0.2); color: #818cf8; }
.screen-tag { background: rgba(52, 211, 153, 0.2); color: #34d399; }
.shelf-tag { background: rgba(251, 191, 36, 0.2); color: #fbbf24; }

.equip-card h3 {
  font-size: 0.88rem;
  font-weight: 600;
  margin-bottom: var(--space-sm);
  color: var(--text-primary);
}

.equip-specs {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.equip-spec {
  display: flex;
  justify-content: space-between;
  font-size: 0.75rem;
}

.equip-spec span:first-child {
  color: var(--text-tertiary);
}

.equip-spec span:last-child {
  font-family: var(--font-mono);
  color: var(--text-secondary);
  font-weight: 500;
}

/* ===== Warnings List ===== */
.warnings-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

.warning-item {
  display: flex;
  gap: var(--space-sm);
  padding: var(--space-md);
  border-radius: var(--radius-sm);
  font-size: 0.78rem;
  line-height: 1.4;
  animation: fadeIn 0.2s ease-out;
}

.warning-item.error {
  background: var(--danger-bg);
  border: 1px solid rgba(248, 113, 113, 0.2);
  color: var(--danger);
}

.warning-item.warn {
  background: var(--warning-bg);
  border: 1px solid rgba(251, 191, 36, 0.2);
  color: var(--warning);
}

.warning-item.info {
  background: var(--info-bg);
  border: 1px solid rgba(96, 165, 250, 0.2);
  color: var(--info);
}

.warning-item svg {
  flex-shrink: 0;
  margin-top: 1px;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(-4px); }
  to { opacity: 1; transform: translateY(0); }
}

/* ===== SVG Viz Styles ===== */
.dim-line {
  stroke: rgba(255, 255, 255, 0.25);
  stroke-width: 0.8;
  stroke-dasharray: 4 3;
}

.dim-arrow {
  stroke: rgba(255, 255, 255, 0.4);
  stroke-width: 1;
  fill: none;
}

.dim-text {
  font-family: 'JetBrains Mono', monospace;
  font-size: 10px;
  fill: rgba(255, 255, 255, 0.6);
  font-weight: 500;
}

.dim-text-bg {
  fill: var(--bg-primary);
  opacity: 0.85;
}

.component-label {
  font-family: 'Inter', sans-serif;
  font-size: 11px;
  fill: rgba(255, 255, 255, 0.5);
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

/* ===== Responsive ===== */
@media (max-width: 1400px) {
  :root {
    --panel-width: 300px;
  }
}

@media (max-width: 1100px) {
  :root {
    --panel-width: 280px;
  }
  
  .logo-text .subtitle {
    display: none;
  }
}

/* ===== Scrollbar global ===== */
* {
  scrollbar-width: thin;
  scrollbar-color: var(--surface-3) transparent;
}

*::-webkit-scrollbar {
  width: 5px;
  height: 5px;
}

*::-webkit-scrollbar-track {
  background: transparent;
}

*::-webkit-scrollbar-thumb {
  background: var(--surface-3);
  border-radius: 10px;
}

/* Select Control Custom Styling */
.select-control {
  width: 100%;
  padding: var(--space-sm) var(--space-md);
  background: var(--surface-2);
  border: 1px solid var(--border-default);
  border-radius: var(--radius-sm);
  color: var(--text-primary);
  font-family: var(--font-sans);
  font-size: 0.82rem;
  outline: none;
  cursor: pointer;
  margin-top: var(--space-sm);
  transition: border-color var(--transition-fast), background var(--transition-fast);
}

.select-control:focus {
  border-color: var(--accent-primary);
  background: var(--surface-3);
}

.select-control option {
  background: var(--bg-tertiary);
  color: var(--text-primary);
}

/* System State Toggle Styling */
.system-state-toggle {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  background: rgba(255, 255, 255, 0.02);
  padding: 3px 8px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-subtle);
}

.toggle-label {
  font-size: 0.78rem;
  color: var(--text-secondary);
  font-weight: 500;
}

.toggle-buttons {
  display: flex;
  gap: var(--space-xs);
}

.toggle-btn {
  padding: var(--space-xs) var(--space-md);
  border: none;
  border-radius: 4px;
  background: transparent;
  color: var(--text-tertiary);
  font-family: var(--font-sans);
  font-size: 0.75rem;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.toggle-btn:hover {
  color: var(--text-secondary);
  background: rgba(255, 255, 255, 0.03);
}

.toggle-btn.active {
  background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
  color: white;
  box-shadow: 0 2px 6px rgba(99, 102, 241, 0.3);
}