:root {
  --bg-glass: rgba(14, 21, 28, 0.84);
  --bg-glass-strong: rgba(10, 16, 22, 0.94);
  --border-subtle: rgba(255, 255, 255, 0.12);
  --border-accent: rgba(56, 189, 248, 0.55);
  --text-primary: #f1f5f9;
  --text-secondary: #94a3b8;
  --accent-cyan: #38bdf8;
  --accent-gold: #fbbf24;
  --accent-emerald: #34d399;
  --shadow-lg: 0 20px 40px -12px rgba(0, 0, 0, 0.65);
}

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

html, body {
  width: 100%;
  height: 100%;
  overflow: hidden;
  overscroll-behavior: none;
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  background: #0b1218;
  color: var(--text-primary);
  user-select: none;
  -webkit-user-select: none;
  -webkit-tap-highlight-color: transparent;
}

#canvas-container {
  position: fixed;
  inset: 0;
  z-index: 1;
  touch-action: none;
}

#labels-container {
  position: fixed;
  inset: 0;
  z-index: 2;
  pointer-events: none;
  overflow: hidden;
}

.hidden {
  display: none !important;
}

/* Loading Overlay */
#loading-overlay {
  position: fixed;
  inset: 0;
  z-index: 100;
  background: radial-gradient(circle at center, #13202c 0%, #091016 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: opacity 0.5s ease;
}

.loader-card {
  text-align: center;
  max-width: 440px;
  padding: 32px;
}

.loader-spinner {
  width: 48px;
  height: 48px;
  margin: 0 auto 20px;
  border: 3px solid rgba(56, 189, 248, 0.2);
  border-top-color: var(--accent-cyan);
  border-radius: 50%;
  animation: spin 0.9s linear infinite;
}

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

.loader-card h2 {
  font-family: 'Playfair Display', serif;
  font-size: 1.5rem;
  margin-bottom: 8px;
  color: #fff;
}

.loader-card p {
  font-size: 0.875rem;
  color: var(--text-secondary);
  line-height: 1.5;
}

/* Floating Show Panel Button (when Left Panel is hidden) */
.show-panel-btn {
  position: fixed;
  top: 16px;
  left: 16px;
  z-index: 12;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: var(--bg-glass-strong);
  backdrop-filter: blur(14px);
  border: 1px solid var(--border-accent);
  color: var(--text-primary);
  font-size: 0.82rem;
  font-weight: 600;
  padding: 9px 14px;
  border-radius: 10px;
  cursor: pointer;
  box-shadow: var(--shadow-lg);
  transition: all 0.15s ease;
}

.show-panel-btn:hover {
  background: rgba(56, 189, 248, 0.22);
}

/* Top Left Search & Directory Panel */
.top-panel {
  position: fixed;
  top: 16px;
  left: 16px;
  width: 365px;
  max-width: calc(100vw - 32px);
  z-index: 10;
  background: var(--bg-glass);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid var(--border-subtle);
  border-radius: 14px;
  padding: 16px;
  box-shadow: var(--shadow-lg);
}

.brand-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  margin-bottom: 12px;
}

.header-actions {
  display: flex;
  gap: 6px;
}

.eyebrow {
  display: block;
  font-size: 0.65rem;
  font-weight: 700;
  letter-spacing: 0.11em;
  color: var(--accent-cyan);
  margin-bottom: 2px;
}

.brand-header h1 {
  font-family: 'Playfair Display', serif;
  font-size: 1.55rem;
  font-weight: 700;
  letter-spacing: -0.01em;
  display: flex;
  align-items: center;
  gap: 8px;
}

.badge-3d {
  font-family: 'Inter', sans-serif;
  font-size: 0.7rem;
  font-weight: 700;
  background: linear-gradient(135deg, #0284c7, #38bdf8);
  color: #082f49;
  padding: 2px 7px;
  border-radius: 6px;
  vertical-align: middle;
}

.icon-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: rgba(255, 255, 255, 0.07);
  border: 1px solid var(--border-subtle);
  color: var(--text-primary);
  font-size: 0.74rem;
  font-weight: 600;
  padding: 6px 10px;
  border-radius: 8px;
  cursor: pointer;
  white-space: nowrap;
  transition: all 0.15s ease;
}

.icon-btn:hover, .icon-btn.active {
  background: rgba(251, 191, 36, 0.22);
  border-color: var(--accent-gold);
  color: #fff;
}

/* Search Box */
.search-wrapper {
  position: relative;
  margin-bottom: 10px;
}

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

#plot-search {
  width: 100%;
  background: rgba(0, 0, 0, 0.35);
  border: 1px solid var(--border-subtle);
  border-radius: 10px;
  padding: 10px 34px 10px 36px;
  color: var(--text-primary);
  font-size: 0.875rem;
  outline: none;
  transition: border-color 0.2s, box-shadow 0.2s;
}

#plot-search:focus {
  border-color: var(--accent-cyan);
  box-shadow: 0 0 0 3px rgba(56, 189, 248, 0.18);
}

.clear-btn {
  position: absolute;
  right: 8px;
  top: 50%;
  transform: translateY(-50%);
  background: none;
  border: none;
  color: var(--text-secondary);
  font-size: 1.2rem;
  cursor: pointer;
  padding: 2px 6px;
}

.search-dropdown {
  position: absolute;
  top: calc(100% + 6px);
  left: 0;
  right: 0;
  max-height: 280px;
  overflow-y: auto;
  background: var(--bg-glass-strong);
  border: 1px solid var(--border-accent);
  border-radius: 10px;
  box-shadow: var(--shadow-lg);
  z-index: 30;
}

.search-item {
  padding: 9px 12px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  cursor: pointer;
  border-bottom: 1px solid rgba(255, 255, 255, 0.05);
  transition: background 0.12s;
}

.search-item:last-child {
  border-bottom: none;
}

.search-item:hover, .search-item.active {
  background: rgba(56, 189, 248, 0.18);
}

.search-item-name {
  font-size: 0.86rem;
  font-weight: 600;
  color: #fff;
}

.search-item-sec {
  font-size: 0.72rem;
  color: var(--text-secondary);
}

/* Directory Accordion */
.directory-bar {
  display: flex;
  gap: 6px;
  align-items: center;
}

.dir-toggle-btn {
  flex: 1;
  display: flex;
  justify-content: space-between;
  align-items: center;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.08);
  color: var(--text-secondary);
  font-size: 0.78rem;
  font-weight: 500;
  padding: 7px 11px;
  border-radius: 8px;
  cursor: pointer;
  transition: all 0.15s;
}

.dir-toggle-btn:hover {
  color: var(--text-primary);
  background: rgba(255, 255, 255, 0.08);
}

.directory-drawer {
  margin-top: 10px;
  border-top: 1px solid var(--border-subtle);
  padding-top: 10px;
}

.section-filters {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
  margin-bottom: 8px;
}

.filter-chip {
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid transparent;
  color: var(--text-secondary);
  font-size: 0.7rem;
  font-weight: 600;
  padding: 4px 8px;
  border-radius: 999px;
  cursor: pointer;
}

.filter-chip.active {
  background: rgba(56, 189, 248, 0.2);
  border-color: var(--accent-cyan);
  color: #fff;
}

.directory-list {
  max-height: 260px;
  overflow-y: auto;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 5px;
  padding-right: 4px;
}

.dir-item {
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.06);
  border-radius: 7px;
  padding: 6px 8px;
  font-size: 0.75rem;
  font-weight: 500;
  color: var(--text-primary);
  text-align: left;
  cursor: pointer;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  transition: all 0.12s;
}

.dir-item:hover, .dir-item.selected {
  background: rgba(56, 189, 248, 0.22);
  border-color: var(--accent-cyan);
  color: #fff;
}

.primary-btn, .secondary-btn {
  font-size: 0.76rem;
  font-weight: 600;
  padding: 8px 10px;
  border-radius: 8px;
  cursor: pointer;
  text-align: center;
  text-decoration: none;
  transition: all 0.15s;
}

.primary-btn {
  background: linear-gradient(135deg, #0284c7, #38bdf8);
  color: #062235;
  border: none;
}

.primary-btn:hover {
  filter: brightness(1.1);
}

.secondary-btn {
  background: rgba(255, 255, 255, 0.07);
  color: var(--text-primary);
  border: 1px solid var(--border-subtle);
}

.secondary-btn:hover, .secondary-btn.active {
  background: rgba(251, 191, 36, 0.2);
  border-color: var(--accent-gold);
  color: #fff;
}

/* Plot Inspector Card */
.plot-card {
  position: fixed;
  bottom: 48px;
  left: 16px;
  width: 365px;
  max-width: calc(100vw - 32px);
  z-index: 15;
  background: var(--bg-glass-strong);
  backdrop-filter: blur(18px);
  border: 1px solid var(--border-accent);
  border-radius: 14px;
  padding: 16px;
  box-shadow: var(--shadow-lg);
  animation: slideUp 0.22s ease-out;
}

@keyframes slideUp {
  from { transform: translateY(14px); opacity: 0; }
  to { transform: translateY(0); opacity: 1; }
}

.plot-card-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: 12px;
}

.card-eyebrow {
  font-size: 0.68rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--accent-gold);
}

.plot-card-header h2 {
  font-family: 'Playfair Display', serif;
  font-size: 1.35rem;
  color: #fff;
  margin-top: 2px;
}

.close-btn {
  background: none;
  border: none;
  color: var(--text-secondary);
  font-size: 1.4rem;
  line-height: 1;
  cursor: pointer;
}

.plot-metrics {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
  margin-bottom: 10px;
}

.metric {
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.07);
  border-radius: 8px;
  padding: 8px 10px;
}

.metric-label {
  display: block;
  font-size: 0.68rem;
  color: var(--text-secondary);
  margin-bottom: 2px;
}

.metric-val {
  font-size: 0.88rem;
  font-weight: 700;
  color: var(--text-primary);
}

.card-inspire-meta {
  font-size: 0.74rem;
  color: var(--text-secondary);
  margin-bottom: 12px;
}

.card-inspire-meta span {
  color: var(--accent-cyan);
  font-family: monospace;
}

.card-actions {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: 6px;
}

/* 3D Floating House Pins */
.house-label {
  position: absolute;
  left: 0;
  top: 0;
  transform: translate(-50%, -100%);
  pointer-events: auto;
  cursor: pointer;
  display: flex;
  flex-direction: column;
  align-items: center;
  transition: opacity 0.15s ease;
  will-change: transform, opacity;
}

.house-label .label-tag {
  background: rgba(11, 18, 25, 0.88);
  border: 1px solid rgba(255, 255, 255, 0.22);
  color: #f8fafc;
  font-size: 11px;
  font-weight: 600;
  padding: 3px 8px;
  border-radius: 6px;
  white-space: nowrap;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.55);
  transition: transform 0.15s, background 0.15s, border-color 0.15s;
}

.house-label .label-stem {
  width: 1.5px;
  height: 10px;
  background: rgba(56, 189, 248, 0.75);
}

.house-label .label-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent-cyan);
  box-shadow: 0 0 6px var(--accent-cyan);
}

.house-label:hover .label-tag,
.house-label.selected .label-tag {
  background: #0284c7;
  border-color: #fde047;
  color: #fff;
  transform: scale(1.12);
  z-index: 20;
}

.house-label.selected .label-dot {
  background: var(--accent-gold);
  box-shadow: 0 0 10px var(--accent-gold);
}

/* 3D Road Name Labels */
.road-label {
  position: absolute;
  left: 0;
  top: 0;
  transform: translate(-50%, -50%);
  pointer-events: none;
  background: rgba(30, 41, 59, 0.85);
  border: 1px solid rgba(251, 191, 36, 0.55);
  color: #fde68a;
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.12em;
  padding: 2px 7px;
  border-radius: 4px;
  white-space: nowrap;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.5);
  will-change: transform, opacity;
}

.road-label.edge-label {
  background: rgba(6, 78, 59, 0.92);
  border: 1.5px solid #34d399;
  color: #ecfdf5;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.05em;
  padding: 4px 10px;
  border-radius: 999px;
  box-shadow: 0 4px 14px rgba(0, 0, 0, 0.65);
}

/* Bottom Telemetry Bar */
.telemetry-bar {
  position: fixed;
  bottom: 12px;
  left: 16px;
  z-index: 10;
  background: rgba(10, 16, 22, 0.78);
  backdrop-filter: blur(10px);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 8px;
  padding: 6px 12px;
  font-size: 0.73rem;
  color: var(--text-secondary);
  display: flex;
  align-items: center;
  gap: 10px;
}

.telemetry-bar .sep {
  opacity: 0.35;
}

/* Mobile & Tablet Responsive Optimisations */
@media (max-width: 768px) {
  .top-panel {
    left: 12px;
    right: 12px;
    top: max(12px, env(safe-area-inset-top));
    width: auto;
    max-width: none;
  }

  .plot-card {
    left: 12px;
    right: 12px;
    bottom: max(12px, env(safe-area-inset-bottom));
    width: auto;
    max-width: none;
  }
}

@media (max-width: 640px) {
  .show-panel-btn {
    top: max(10px, env(safe-area-inset-top));
    left: 10px;
    padding: 8px 12px;
    font-size: 0.78rem;
  }

  .top-panel {
    left: 10px;
    right: 10px;
    top: max(10px, env(safe-area-inset-top));
    padding: 11px 12px;
    border-radius: 12px;
  }

  .brand-header {
    margin-bottom: 8px;
    align-items: center;
  }

  .eyebrow {
    font-size: 0.58rem;
    letter-spacing: 0.08em;
    margin-bottom: 1px;
  }

  .brand-header h1 {
    font-size: 1.25rem;
    gap: 6px;
  }

  .badge-3d {
    font-size: 0.62rem;
    padding: 1px 6px;
  }

  .icon-btn {
    font-size: 0.72rem;
    padding: 6px 9px;
  }

  .search-wrapper {
    margin-bottom: 8px;
  }

  /* 16px font size prevents iOS Safari from auto-zooming the viewport on focus */
  #plot-search {
    font-size: 16px;
    padding: 8px 32px 8px 34px;
    border-radius: 9px;
  }

  .search-dropdown {
    max-height: 42vh;
  }

  .search-item {
    padding: 10px 12px;
  }

  .dir-toggle-btn {
    padding: 7px 10px;
    font-size: 0.75rem;
  }

  /* Single-row horizontal scroll for road section filter chips on mobile */
  .section-filters {
    flex-wrap: nowrap;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none;
    padding-bottom: 4px;
    margin-bottom: 6px;
  }

  .section-filters::-webkit-scrollbar {
    display: none;
  }

  .filter-chip {
    flex-shrink: 0;
    padding: 5px 10px;
    font-size: 0.72rem;
  }

  .directory-list {
    max-height: 34vh;
    grid-template-columns: 1fr 1fr;
    gap: 6px;
  }

  .dir-item {
    padding: 8px 9px;
    font-size: 0.76rem;
  }

  /* Bottom-sheet Property Inspector Card on Mobile */
  .plot-card {
    left: 10px;
    right: 10px;
    bottom: max(10px, env(safe-area-inset-bottom));
    padding: 13px 14px;
    border-radius: 14px;
    max-height: 55vh;
    overflow-y: auto;
  }

  .plot-card-header {
    margin-bottom: 8px;
  }

  .plot-card-header h2 {
    font-size: 1.18rem;
  }

  .plot-metrics {
    gap: 6px;
    margin-bottom: 8px;
  }

  .metric {
    padding: 6px 8px;
  }

  .metric-label {
    font-size: 0.63rem;
  }

  .metric-val {
    font-size: 0.82rem;
  }

  .card-inspire-meta {
    font-size: 0.7rem;
    margin-bottom: 9px;
  }

  .card-actions {
    gap: 6px;
  }

  .primary-btn, .secondary-btn {
    padding: 9px 8px;
    font-size: 0.74rem;
  }

  /* Compact 3D labels on narrow mobile phone screens */
  .house-label .label-tag {
    font-size: 10px;
    padding: 2.5px 6px;
    border-radius: 5px;
  }

  .house-label .label-stem {
    height: 7px;
  }

  .road-label {
    font-size: 8.5px;
    padding: 1.5px 5px;
    letter-spacing: 0.08em;
  }

  .road-label.edge-label {
    font-size: 9.5px;
    padding: 3px 8px;
  }

  /* Hide desktop cursor telemetry bar on small phone screens to keep bottom viewport uncluttered */
  .telemetry-bar {
    display: none;
  }
}