/* =========================================================================
   Sirin IaC Visualizer — Premium Design System
   ========================================================================= */

/* ---- Google Font Import ---- */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800;900&family=JetBrains+Mono:wght@400;500;600&display=swap');

/* ---- CSS Custom Properties ---- */
:root {
  /* Theme settings */
  --theme-mode: light;
  
  --background: 0, 0%, 100%;
  --foreground: 240, 10%, 3.9%;
  
  --card: 0, 0%, 100%;
  --card-foreground: 240, 10%, 3.9%;
  
  --popover: 0, 0%, 100%;
  --popover-foreground: 240, 10%, 3.9%;
  
  --primary-hue: 240;
  --primary-sat: 5.9%;
  --primary-light: 10%;
  
  --secondary: 240, 4.8%, 95.9%;
  --secondary-foreground: 240, 5.9%, 10%;
  
  --muted: 240, 4.8%, 95.9%;
  --muted-foreground: 240, 3.8%, 46.1%;
  
  --accent: 240, 4.8%, 95.9%;
  --accent-foreground: 240, 5.9%, 10%;
  
  --destructive: 0, 84.2%, 60.2%;
  --destructive-foreground: 0, 0%, 98%;
  
  --border: #e4e4e7;
  --input: #e4e4e7;
  --ring: 240, 5.9%, 10%;
  
  --radius: 0.5rem;

  /* Map existing UI colors for Light Mode */
  --bg-deepest: #f4f4f5;   /* Sleek light grey canvas background */
  --bg-deep: #ffffff;      /* Pure white cards/sidebar */
  --bg-mid: #ffffff;       /* Pure white node background */
  --bg-surface: #f4f4f5;   /* Muted grey background for legend/stats */
  --bg-elevated: #ffffff;
  --bg-hover: #e4e4e7;

  /* Accent colors - comma-separated HSL for dynamic accents */
  --accent-primary: hsl(var(--primary-hue), var(--primary-sat), var(--primary-light));
  --accent-primary-glow: hsla(var(--primary-hue), var(--primary-sat), var(--primary-light), 0.12);
  --accent-secondary: #7c3aed;
  --accent-secondary-glow: rgba(124, 58, 237, 0.12);
  --accent-success: #16a34a;
  --accent-warning: #d97706;
  --accent-danger: #dc2626;

  /* Category colors - readable on light bg */
  --cat-compute: #2563eb;
  --cat-networking: #0891b2;
  --cat-storage: #ea580c;
  --cat-database: #7c3aed;
  --cat-security: #dc2626;
  --cat-monitoring: #ca8a04;
  --cat-messaging: #db2777;

  /* Text colors */
  --text-primary: #09090b;    /* Dark zinc text */
  --text-secondary: #71717a;  /* Muted zinc text */
  --text-muted: #a1a1aa;
  --text-accent: var(--accent-primary);

  /* Glassmorphic elements for light theme */
  --glass-bg: rgba(255, 255, 255, 0.8);
  --glass-border: #e4e4e7;
  --glass-border-hover: #d4d4d8;
  --glass-shadow: 0 8px 32px rgba(0, 0, 0, 0.05);

  /* Layout dimensions */
  --sidebar-width: 340px;
  --toolbar-height: 56px;
  --radius-sm: calc(var(--radius) - 2px);
  --radius-md: var(--radius);
  --radius-lg: calc(var(--radius) + 4px);
  --radius-xl: calc(var(--radius) + 8px);

  /* Transitions */
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
  --ease-spring: cubic-bezier(0.34, 1.56, 0.64, 1);
  --transition-fast: 150ms var(--ease-out);
  --transition-normal: 250ms var(--ease-out);
  --transition-slow: 400ms var(--ease-out);
}

/* ---- Dark Mode Overrides ---- */
[data-theme="dark"] {
  --theme-mode: dark;
  
  --background: 240, 10%, 3.9%;
  --foreground: 0, 0%, 98%;
  
  --card: 240, 10%, 3.9%;
  --card-foreground: 0, 0%, 98%;
  
  --popover: 240, 10%, 3.9%;
  --popover-foreground: 0, 0%, 98%;
  
  /* Primary dark default */
  --primary-hue: 240;
  --primary-sat: 5.9%;
  --primary-light: 90%;
  
  --secondary: 240, 3.7%, 15.9%;
  --secondary-foreground: 0, 0%, 98%;
  
  --muted: 240, 3.7%, 15.9%;
  --muted-foreground: 240, 5%, 64.9%;
  
  --accent: 240, 3.7%, 15.9%;
  --accent-foreground: 0, 0%, 98%;
  
  --destructive: 0, 62.8%, 30.6%;
  --destructive-foreground: 0, 0%, 98%;
  
  --border: rgba(255, 255, 255, 0.08);
  --input: rgba(255, 255, 255, 0.08);
  --ring: 240, 4.9%, 83.9%;

  /* Premium dark theme variables */
  --bg-deepest: #050816;
  --bg-deep: #0a0e27;
  --bg-mid: #111638;
  --bg-surface: #181d4a;
  --bg-elevated: #1e245c;
  --bg-hover: #262d6e;

  /* Accent colors */
  --accent-primary: hsl(var(--primary-hue), var(--primary-sat), var(--primary-light));
  --accent-primary-glow: hsla(var(--primary-hue), var(--primary-sat), var(--primary-light), 0.25);
  --accent-secondary: #7c3aed;
  --accent-secondary-glow: rgba(124, 58, 237, 0.25);
  --accent-success: #22c55e;
  --accent-warning: #f59e0b;
  --accent-danger: #ef4444;

  /* Category colors */
  --cat-compute: #3b82f6;
  --cat-networking: #22d3ee;
  --cat-storage: #f97316;
  --cat-database: #a855f7;
  --cat-security: #ef4444;
  --cat-monitoring: #eab308;
  --cat-messaging: #ec4899;

  /* Text colors */
  --text-primary: #f0f4ff;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;

  /* Glassmorphic elements */
  --glass-bg: rgba(17, 22, 56, 0.75);
  --glass-border: rgba(255, 255, 255, 0.08);
  --glass-border-hover: rgba(255, 255, 255, 0.15);
  --glass-shadow: 0 8px 32px rgba(0, 0, 0, 0.4);
}

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

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

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  background: var(--bg-deepest);
  color: var(--text-primary);
  overflow: hidden;
  height: 100vh;
  width: 100vw;
}

/* ---- Scrollbar ---- */
::-webkit-scrollbar {
  width: 6px;
}
::-webkit-scrollbar-track {
  background: transparent;
}
::-webkit-scrollbar-thumb {
  background: hsla(var(--foreground), 0.12);
  border-radius: 3px;
}
::-webkit-scrollbar-thumb:hover {
  background: hsla(var(--foreground), 0.22);
}

/* ---- App Layout ---- */
#app {
  display: flex;
  height: 100vh;
  width: 100vw;
  background: 
    radial-gradient(ellipse 80% 50% at 50% -20%, var(--accent-primary-glow), transparent),
    radial-gradient(ellipse 60% 40% at 80% 110%, var(--accent-secondary-glow), transparent),
    var(--bg-deepest);
}

/* =========================================================================
   SIDEBAR
   ========================================================================= */
.sidebar {
  width: var(--sidebar-width);
  min-width: var(--sidebar-width);
  height: 100vh;
  display: flex;
  flex-direction: column;
  background: var(--glass-bg);
  backdrop-filter: blur(24px);
  -webkit-backdrop-filter: blur(24px);
  border-right: 1px solid var(--glass-border);
  z-index: 20;
  transition: transform var(--transition-slow), opacity var(--transition-slow);
}

.sidebar.collapsed {
  transform: translateX(-100%);
  opacity: 0;
  width: 0;
  min-width: 0;
  overflow: hidden;
}

/* ---- Sidebar Header / Logo ---- */
.sidebar-header {
  padding: 20px 24px;
  border-bottom: 1px solid var(--glass-border);
  display: flex;
  align-items: center;
  gap: 14px;
}

.logo-icon {
  width: 38px;
  height: 38px;
  border-radius: var(--radius-md);
  background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  font-weight: 800;
  color: white;
  box-shadow: 0 4px 16px rgba(0, 212, 255, 0.3);
  position: relative;
}

.logo-icon::after {
  content: '';
  position: absolute;
  inset: -2px;
  border-radius: calc(var(--radius-md) + 2px);
  background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
  z-index: -1;
  opacity: 0.4;
  filter: blur(8px);
}

.logo-text {
  display: flex;
  flex-direction: column;
}

.logo-title {
  font-size: 16px;
  font-weight: 700;
  letter-spacing: -0.02em;
  background: linear-gradient(135deg, var(--text-primary), var(--accent-primary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.logo-subtitle {
  font-size: 11px;
  color: var(--text-muted);
  font-weight: 500;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

/* ---- Sidebar Sections ---- */
.sidebar-content {
  flex: 1;
  overflow-y: auto;
  padding: 16px 0;
}

.sidebar-section {
  padding: 0 16px;
  margin-bottom: 24px;
}

.sidebar-section-title {
  font-size: 10px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--text-muted);
  padding: 0 8px;
  margin-bottom: 10px;
}

/* ---- File Picker ---- */
.file-picker {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.file-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 12px;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all var(--transition-fast);
  border: 1px solid transparent;
  position: relative;
  overflow: hidden;
}

.file-item::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(0, 212, 255, 0.05), rgba(124, 58, 237, 0.05));
  opacity: 0;
  transition: opacity var(--transition-fast);
}

.file-item:hover {
  background: var(--bg-surface);
  border-color: var(--glass-border-hover);
}

.file-item:hover::before {
  opacity: 1;
}

.file-item.active {
  background: var(--bg-elevated);
  border-color: var(--accent-primary);
  box-shadow: 0 0 20px var(--accent-primary-glow);
}

.file-icon {
  width: 32px;
  height: 32px;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 14px;
  flex-shrink: 0;
}

.file-icon.env-production { background: rgba(239, 68, 68, 0.15); color: var(--accent-danger); }
.file-icon.env-staging { background: rgba(245, 158, 11, 0.15); color: var(--accent-warning); }
.file-icon.env-development { background: rgba(59, 130, 246, 0.15); color: var(--cat-compute); }
.file-icon.env-template { background: rgba(148, 163, 184, 0.15); color: var(--text-secondary); }

.file-info {
  display: flex;
  flex-direction: column;
  min-width: 0;
}

.file-name {
  font-size: 13px;
  font-weight: 600;
  color: var(--text-primary);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.file-meta {
  font-size: 11px;
  color: var(--text-muted);
}

/* ---- Upload Button ---- */
.upload-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  width: 100%;
  padding: 10px;
  border-radius: var(--radius-sm);
  border: 1px dashed var(--glass-border-hover);
  background: transparent;
  color: var(--text-secondary);
  font-family: inherit;
  font-size: 12px;
  font-weight: 500;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.upload-btn:hover {
  border-color: var(--accent-primary);
  color: var(--accent-primary);
  background: var(--accent-primary-glow);
}

/* ---- Legend ---- */
.legend-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4px;
}

.legend-item {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 6px 8px;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all var(--transition-fast);
  user-select: none;
}

.legend-item:hover {
  background: var(--bg-surface);
}

.legend-item.dimmed {
  opacity: 0.35;
}

.legend-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  flex-shrink: 0;
  box-shadow: 0 0 8px currentColor;
}

.legend-label {
  font-size: 11px;
  font-weight: 500;
  color: var(--text-secondary);
  white-space: nowrap;
}

/* ---- Stats Panel ---- */
.stats-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
}

.stat-card {
  background: var(--bg-surface);
  border-radius: var(--radius-sm);
  padding: 12px;
  border: 1px solid var(--glass-border);
  transition: all var(--transition-fast);
}

.stat-card:hover {
  border-color: var(--glass-border-hover);
  transform: translateY(-1px);
}

.stat-value {
  font-size: 22px;
  font-weight: 800;
  font-family: 'JetBrains Mono', monospace;
  background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.stat-label {
  font-size: 10px;
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-top: 2px;
}

/* ---- Resource Inspector ---- */
.inspector {
  padding: 0 16px;
}

.inspector-empty {
  text-align: center;
  padding: 32px 16px;
  color: var(--text-muted);
  font-size: 12px;
}

.inspector-empty-icon {
  font-size: 32px;
  margin-bottom: 12px;
  opacity: 0.4;
}

.inspector-card {
  background: var(--bg-surface);
  border-radius: var(--radius-md);
  border: 1px solid var(--glass-border);
  overflow: hidden;
  animation: inspectorSlideIn 0.3s var(--ease-out);
}

@keyframes inspectorSlideIn {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: translateY(0); }
}

.inspector-header {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 16px;
  border-bottom: 1px solid var(--glass-border);
}

.inspector-icon {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.inspector-icon img,
.inspector-icon svg {
  width: 28px;
  height: 28px;
}

.inspector-title {
  font-size: 15px;
  font-weight: 700;
  color: var(--text-primary);
}

.inspector-type {
  font-size: 11px;
  color: var(--text-muted);
  font-family: 'JetBrains Mono', monospace;
  font-weight: 500;
}

.inspector-body {
  padding: 16px;
}

.inspector-row {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  padding: 8px 0;
  border-bottom: 1px solid rgba(255, 255, 255, 0.04);
}

.inspector-row:last-child {
  border-bottom: none;
}

.inspector-key {
  font-size: 11px;
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.04em;
  flex-shrink: 0;
}

.inspector-value {
  font-size: 12px;
  color: var(--text-primary);
  text-align: right;
  font-family: 'JetBrains Mono', monospace;
  word-break: break-all;
  max-width: 60%;
}

.inspector-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 4px;
  padding: 12px 16px;
  border-top: 1px solid var(--glass-border);
}

.tag-chip {
  display: inline-flex;
  align-items: center;
  padding: 3px 8px;
  border-radius: 4px;
  font-size: 10px;
  font-weight: 600;
  background: var(--bg-elevated);
  color: var(--text-secondary);
  font-family: 'JetBrains Mono', monospace;
  border: 1px solid var(--glass-border);
}

.inspector-description {
  padding: 12px 16px;
  border-top: 1px solid var(--glass-border);
  font-size: 12px;
  color: var(--text-secondary);
  line-height: 1.6;
}

/* =========================================================================
   MAIN CONTENT
   ========================================================================= */
.main-content {
  flex: 1;
  display: flex;
  flex-direction: column;
  position: relative;
  overflow: hidden;
}

/* ---- Toolbar ---- */
.toolbar {
  height: var(--toolbar-height);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 20px;
  background: var(--glass-bg);
  backdrop-filter: blur(24px);
  -webkit-backdrop-filter: blur(24px);
  border-bottom: 1px solid var(--glass-border);
  z-index: 15;
  gap: 12px;
}

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

.toolbar-divider {
  width: 1px;
  height: 24px;
  background: var(--glass-border);
  margin: 0 8px;
}

.toolbar-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border: none;
  border-radius: var(--radius-sm);
  background: transparent;
  color: var(--text-secondary);
  font-size: 16px;
  cursor: pointer;
  transition: all var(--transition-fast);
  position: relative;
}

.toolbar-btn:hover {
  background: var(--bg-surface);
  color: var(--text-primary);
}

.toolbar-btn.active {
  background: var(--bg-elevated);
  color: var(--accent-primary);
  box-shadow: 0 0 12px var(--accent-primary-glow);
}

.toolbar-btn[title]::after {
  content: attr(title);
  position: absolute;
  bottom: -30px;
  left: 50%;
  transform: translateX(-50%);
  padding: 4px 8px;
  border-radius: 4px;
  background: var(--bg-elevated);
  color: var(--text-primary);
  font-size: 10px;
  font-weight: 500;
  white-space: nowrap;
  pointer-events: none;
  opacity: 0;
  transition: opacity var(--transition-fast);
  z-index: 99;
  border: 1px solid var(--glass-border);
}

.toolbar-btn:hover[title]::after {
  opacity: 1;
}

.toolbar-label-btn {
  display: flex;
  align-items: center;
  gap: 6px;
  height: 36px;
  padding: 0 14px;
  border: none;
  border-radius: var(--radius-sm);
  background: transparent;
  color: var(--text-secondary);
  font-family: inherit;
  font-size: 12px;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition-fast);
  white-space: nowrap;
}

.toolbar-label-btn:hover {
  background: var(--bg-surface);
  color: var(--text-primary);
}

.toolbar-label-btn.active {
  background: var(--bg-elevated);
  color: var(--accent-primary);
}

/* ---- Search ---- */
.toolbar-search {
  position: relative;
  flex: 0 1 260px;
}

.toolbar-search input {
  width: 100%;
  height: 36px;
  padding: 0 12px 0 36px;
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-sm);
  background: var(--bg-surface);
  color: var(--text-primary);
  font-family: inherit;
  font-size: 12px;
  outline: none;
  transition: all var(--transition-fast);
}

.toolbar-search input:focus {
  border-color: var(--accent-primary);
  box-shadow: 0 0 0 3px var(--accent-primary-glow);
}

.toolbar-search input::placeholder {
  color: var(--text-muted);
}

.toolbar-search-icon {
  position: absolute;
  left: 12px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--text-muted);
  font-size: 13px;
  pointer-events: none;
}

/* ---- Environment Badge ---- */
.env-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 12px;
  border-radius: 20px;
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.env-badge.production {
  background: rgba(239, 68, 68, 0.12);
  color: var(--accent-danger);
  border: 1px solid rgba(239, 68, 68, 0.3);
}

.env-badge.staging {
  background: rgba(245, 158, 11, 0.12);
  color: var(--accent-warning);
  border: 1px solid rgba(245, 158, 11, 0.3);
}

.env-badge.development {
  background: rgba(59, 130, 246, 0.12);
  color: var(--cat-compute);
  border: 1px solid rgba(59, 130, 246, 0.3);
}

.env-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: currentColor;
  animation: envPulse 2s ease-in-out infinite;
}

@keyframes envPulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.5; transform: scale(0.8); }
}

/* ---- Canvas ---- */
.canvas-container {
  flex: 1;
  position: relative;
  overflow: hidden;
}

#cy {
  width: 100%;
  height: 100%;
  position: absolute;
  inset: 0;
}

/* ---- Canvas Watermark ---- */
.canvas-watermark {
  position: absolute;
  bottom: 20px;
  right: 20px;
  font-size: 10px;
  color: var(--text-muted);
  opacity: 0.5;
  font-weight: 500;
  pointer-events: none;
  z-index: 5;
}

/* ---- Layout Dropdown ---- */
.layout-dropdown {
  position: absolute;
  top: calc(var(--toolbar-height) + 8px);
  right: 20px;
  background: var(--bg-surface);
  backdrop-filter: blur(24px);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-md);
  padding: 6px;
  z-index: 50;
  min-width: 180px;
  box-shadow: var(--glass-shadow);
  display: none;
  animation: dropdownIn 0.2s var(--ease-out);
}

.layout-dropdown.visible {
  display: block;
}

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

.layout-option {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 8px 12px;
  border: none;
  border-radius: var(--radius-sm);
  background: transparent;
  color: var(--text-secondary);
  font-family: inherit;
  font-size: 12px;
  font-weight: 500;
  cursor: pointer;
  width: 100%;
  text-align: left;
  transition: all var(--transition-fast);
}

.layout-option:hover {
  background: var(--bg-elevated);
  color: var(--text-primary);
}

.layout-option.active {
  color: var(--accent-primary);
  background: var(--accent-primary-glow);
}

/* ---- Toast ---- */
.toast-container {
  position: fixed;
  bottom: 20px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 1000;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.toast {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 12px 20px;
  border-radius: var(--radius-md);
  background: var(--bg-elevated);
  backdrop-filter: blur(24px);
  border: 1px solid var(--glass-border);
  box-shadow: var(--glass-shadow);
  font-size: 13px;
  font-weight: 500;
  color: var(--text-primary);
  animation: toastIn 0.4s var(--ease-spring);
  white-space: nowrap;
}

.toast.leaving {
  animation: toastOut 0.3s var(--ease-out) forwards;
}

@keyframes toastIn {
  from { opacity: 0; transform: translateY(20px) scale(0.95); }
  to { opacity: 1; transform: translateY(0) scale(1); }
}

@keyframes toastOut {
  to { opacity: 0; transform: translateY(10px) scale(0.95); }
}

/* ---- Loading Overlay ---- */
.loading-overlay {
  position: absolute;
  inset: 0;
  background: var(--bg-deepest);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  z-index: 100;
  transition: opacity 0.6s var(--ease-out);
}

.loading-overlay.hidden {
  opacity: 0;
  pointer-events: none;
}

.loading-spinner {
  width: 48px;
  height: 48px;
  border: 3px solid var(--glass-border);
  border-top-color: var(--accent-primary);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
  margin-bottom: 16px;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

.loading-text {
  font-size: 14px;
  font-weight: 600;
  color: var(--text-secondary);
}

/* ---- Empty State ---- */
.empty-state {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  color: var(--text-muted);
  z-index: 5;
  pointer-events: none;
}

.empty-state-icon {
  font-size: 64px;
  margin-bottom: 16px;
  opacity: 0.3;
}

.empty-state-title {
  font-size: 18px;
  font-weight: 700;
  color: var(--text-secondary);
  margin-bottom: 6px;
}

.empty-state-desc {
  font-size: 13px;
  color: var(--text-muted);
}

/* ---- Mini Map (Cytoscape navigator) ---- */
.minimap {
  position: absolute;
  bottom: 16px;
  left: 16px;
  width: 180px;
  height: 120px;
  background: var(--glass-bg);
  backdrop-filter: blur(16px);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-md);
  overflow: hidden;
  z-index: 10;
  opacity: 0.85;
  transition: opacity var(--transition-fast);
}

.minimap:hover {
  opacity: 1;
}

/* ---- Hidden file input ---- */
#json-file-input {
  display: none;
}

/* ---- Utility ---- */
.mono {
  font-family: 'JetBrains Mono', monospace;
}

.truncate {
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

/* ---- Responsive ---- */
@media (max-width: 1200px) {
  .sidebar {
    position: fixed;
    left: 0;
    top: 0;
    z-index: 100;
    box-shadow: var(--glass-shadow);
  }

  .sidebar.collapsed {
    transform: translateX(-100%);
  }
}

/* =========================================================================
   THEME PERSONALIZATION CUSTOMIZER
   ========================================================================= */
.theme-customizer {
  position: absolute;
  bottom: 44px;
  right: 20px;
  width: 260px;
  background: var(--glass-bg);
  backdrop-filter: blur(24px);
  -webkit-backdrop-filter: blur(24px);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
  padding: 16px;
  box-shadow: var(--glass-shadow);
  z-index: 80;
  display: flex;
  flex-direction: column;
  gap: 14px;
  transition: all var(--transition-normal);
}

.theme-customizer.collapsed {
  width: 44px;
  height: 44px;
  padding: 0;
  overflow: hidden;
  border-radius: 50%;
  bottom: 20px;
  right: 20px;
}

.customizer-toggle {
  position: absolute;
  top: 10px;
  right: 10px;
  width: 24px;
  height: 24px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: transparent;
  border: none;
  color: var(--text-secondary);
  cursor: pointer;
  border-radius: var(--radius-sm);
  transition: all var(--transition-fast);
}

.customizer-toggle:hover {
  background: var(--bg-hover);
  color: var(--text-primary);
}

.customizer-header {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  font-size: 13px;
  color: var(--text-primary);
  border-bottom: 1px solid var(--glass-border);
  padding-bottom: 10px;
  margin-right: 20px; /* Leave room for toggle */
}

.customizer-section {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.customizer-label {
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-muted);
}

/* Mode Switcher Buttons */
.mode-toggle-group {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 6px;
}

.mode-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  height: 32px;
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-sm);
  background: var(--bg-deep);
  color: var(--text-secondary);
  font-family: inherit;
  font-size: 12px;
  font-weight: 500;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.mode-btn:hover {
  background: var(--bg-hover);
  color: var(--text-primary);
}

.mode-btn.active {
  background: var(--accent-primary);
  color: var(--bg-deep);
  border-color: var(--accent-primary);
  font-weight: 600;
}

[data-theme="dark"] .mode-btn.active {
  color: #050816;
}

/* Color Accent Presets */
.color-presets {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.color-dot {
  width: 20px;
  height: 20px;
  border-radius: 50%;
  border: 2px solid transparent;
  cursor: pointer;
  position: relative;
  transition: transform var(--transition-fast);
}

.color-dot:hover {
  transform: scale(1.15);
}

.color-dot.active {
  border-color: var(--text-primary);
  box-shadow: 0 0 8px currentColor;
}

/* Presets base styling */
.color-dot.preset-zinc { background-color: #27272a; color: #27272a; }
.color-dot.preset-slate { background-color: #475569; color: #475569; }
.color-dot.preset-blue { background-color: #3b82f6; color: #3b82f6; }
.color-dot.preset-violet { background-color: #8b5cf6; color: #8b5cf6; }
.color-dot.preset-orange { background-color: #f97316; color: #f97316; }
.color-dot.preset-emerald { background-color: #10b981; color: #10b981; }
.color-dot.preset-red { background-color: #ef4444; color: #ef4444; }

/* Radius Slider */
.radius-control-group {
  display: flex;
  align-items: center;
  gap: 10px;
}

.radius-slider {
  flex: 1;
  height: 4px;
  -webkit-appearance: none;
  background: var(--glass-border-hover);
  border-radius: 2px;
  outline: none;
}

.radius-slider::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--accent-primary);
  cursor: pointer;
  transition: transform var(--transition-fast);
}

.radius-slider::-webkit-slider-thumb:hover {
  transform: scale(1.2);
}

.radius-value {
  font-size: 11px;
  font-family: 'JetBrains Mono', monospace;
  color: var(--text-secondary);
  min-width: 42px;
  text-align: right;
}

/* ---- Canvas Tooltip ---- */
.canvas-tooltip {
  position: absolute;
  z-index: 1000;
  pointer-events: none;
  background: var(--glass-bg);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-sm);
  padding: 8px 12px;
  box-shadow: var(--glass-shadow);
  color: var(--text-primary);
  font-family: 'Inter', sans-serif;
  font-size: 12px;
  opacity: 0;
  transform: translate(-50%, -100%) translateY(-38px);
  transition: opacity var(--transition-fast), transform var(--transition-fast);
  display: flex;
  flex-direction: column;
  gap: 2px;
  min-width: 120px;
}

.canvas-tooltip.visible {
  opacity: 1;
  transform: translate(-50%, -100%) translateY(-48px);
}

.canvas-tooltip-header {
  font-size: 10px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-muted);
}

.canvas-tooltip-body {
  display: flex;
  align-items: center;
  gap: 6px;
  font-weight: 600;
}

.canvas-tooltip-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  display: inline-block;
}

/* ---- Layout Toggle Option & Divider ---- */
.layout-toggle-option {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  padding: 8px 12px;
  border: none;
  border-radius: var(--radius-sm);
  background: transparent;
  color: var(--text-secondary);
  font-family: inherit;
  font-size: 12px;
  font-weight: 500;
  cursor: pointer;
  text-align: left;
  transition: all var(--transition-fast);
}

.layout-toggle-option:hover {
  background: var(--bg-hover);
  color: var(--text-primary);
}

.layout-toggle-option.active {
  color: var(--accent-primary);
  background: var(--accent-primary-glow);
}

.toggle-indicator {
  font-weight: 700;
  font-size: 10px;
  opacity: 0.6;
}

.layout-toggle-option.active .toggle-indicator {
  opacity: 1;
}

.layout-dropdown-divider {
  height: 1px;
  background: var(--glass-border);
  margin: 6px 4px;
}