:root {
  --bg-dark: #060a14;
  --panel-bg: rgba(11, 18, 33, 0.82);
  --panel-border: rgba(100, 185, 255, 0.22);
  --panel-border-strong: rgba(56, 189, 248, 0.55);
  --accent: #38bdf8;
  --accent-glow: rgba(56, 189, 248, 0.35);
  --accent-green: #34d399;
  --accent-amber: #fb923c;
  --accent-purple: #c084fc;
  --text-main: #f1f5f9;
  --text-muted: #94a3b8;
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", "Microsoft JhengHei", "PingFang TC", sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', monospace;
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  user-select: none;
  -webkit-user-select: none;
}

html, body {
  width: 100%;
  height: 100%;
  overflow: hidden;
  background-color: var(--bg-dark);
  color: var(--text-main);
  font-family: var(--font-sans);
}

#canvas-container {
  position: fixed;
  inset: 0;
  width: 100vw;
  height: 100vh;
  z-index: 1;
  cursor: grab;
  background: radial-gradient(circle at 50% 45%, #112240 0%, #060a14 75%);
}

#canvas-container:active {
  cursor: grabbing;
}

/* 3D Floating Pin Labels Overlay */
#labels-layer {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 5;
  overflow: hidden;
}

.pin-label {
  position: absolute;
  left: 0;
  top: 0;
  transform: translate(-50%, -125%);
  pointer-events: auto;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 10px;
  border-radius: 999px;
  background: rgba(9, 15, 28, 0.84);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  border: 1px solid rgba(148, 163, 184, 0.32);
  color: #e2e8f0;
  font-size: 0.74rem;
  font-weight: 600;
  white-space: nowrap;
  cursor: pointer;
  box-shadow: 0 4px 14px rgba(0, 0, 0, 0.45);
  transition: background 0.18s ease, border-color 0.18s ease, color 0.18s ease, box-shadow 0.18s ease;
}

.pin-label::after {
  content: '';
  position: absolute;
  bottom: -6px;
  left: 50%;
  transform: translateX(-50%);
  border-width: 6px 5px 0 5px;
  border-style: solid;
  border-color: rgba(148, 163, 184, 0.4) transparent transparent transparent;
}

.pin-label:hover {
  background: rgba(20, 34, 62, 0.95);
  border-color: var(--accent);
  color: #ffffff;
  box-shadow: 0 0 16px var(--accent-glow);
  z-index: 20;
}

.pin-label.active {
  background: linear-gradient(135deg, rgba(14, 116, 144, 0.92), rgba(30, 64, 175, 0.92));
  border-color: #7dd3fc;
  color: #ffffff;
  box-shadow: 0 0 20px rgba(56, 189, 248, 0.65);
  z-index: 25;
}

.pin-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  flex-shrink: 0;
  box-shadow: 0 0 6px currentColor;
}

/* Hover Tooltip */
.hover-tooltip {
  position: fixed;
  pointer-events: none;
  z-index: 30;
  padding: 6px 12px;
  border-radius: 8px;
  background: rgba(15, 23, 42, 0.92);
  border: 1px solid var(--panel-border-strong);
  color: #f8fafc;
  font-size: 0.78rem;
  font-weight: 600;
  box-shadow: 0 6px 20px rgba(0, 0, 0, 0.5);
  transform: translate(14px, 14px);
  transition: opacity 0.12s ease;
}

.hover-tooltip.hidden {
  opacity: 0;
  visibility: hidden;
}

/* Top Header */
.hud-header {
  position: fixed;
  top: 16px;
  left: 20px;
  right: 20px;
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 16px;
  pointer-events: none;
  z-index: 15;
}

.brand-box {
  pointer-events: auto;
  background: var(--panel-bg);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid var(--panel-border);
  border-radius: 14px;
  padding: 12px 18px;
  box-shadow: 0 10px 32px rgba(0, 0, 0, 0.48);
}

.brand-badge {
  display: inline-block;
  font-size: 0.68rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: #38bdf8;
  background: rgba(56, 189, 248, 0.14);
  border: 1px solid rgba(56, 189, 248, 0.32);
  padding: 2px 8px;
  border-radius: 99px;
  margin-bottom: 4px;
}

.brand-title {
  font-size: 1.2rem;
  font-weight: 800;
  letter-spacing: 0.02em;
  background: linear-gradient(90deg, #f8fafc, #7dd3fc, #6ee7b7);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  margin-bottom: 3px;
}

.brand-subtitle {
  font-size: 0.76rem;
  color: var(--text-muted);
}

/* Mode Switcher */
.cell-mode-switcher {
  pointer-events: auto;
  display: flex;
  gap: 8px;
  background: var(--panel-bg);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid var(--panel-border);
  border-radius: 14px;
  padding: 6px;
  box-shadow: 0 10px 32px rgba(0, 0, 0, 0.48);
}

.mode-tab {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 8px 14px;
  border-radius: 10px;
  border: 1px solid transparent;
  background: transparent;
  color: var(--text-muted);
  cursor: pointer;
  transition: all 0.2s ease;
  text-align: left;
}

.mode-tab:hover {
  color: var(--text-main);
  background: rgba(255, 255, 255, 0.05);
}

.mode-tab.active {
  color: #ffffff;
  background: rgba(30, 58, 138, 0.55);
  border-color: rgba(56, 189, 248, 0.5);
  box-shadow: 0 0 18px rgba(56, 189, 248, 0.25);
}

.mode-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
}

.animal-dot {
  background: #f472b6;
  box-shadow: 0 0 8px #f472b6;
}

.plant-dot {
  background: #34d399;
  box-shadow: 0 0 8px #34d399;
}

.compare-dot {
  background: linear-gradient(135deg, #f472b6 50%, #34d399 50%);
  box-shadow: 0 0 8px #38bdf8;
}

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

.mode-name {
  font-size: 0.85rem;
  font-weight: 700;
}

.mode-en {
  font-size: 0.66rem;
  opacity: 0.75;
}

/* Left Sidebar: Organelle Focus List */
.organelle-sidebar {
  position: fixed;
  top: 92px;
  left: 16px;
  bottom: 84px;
  width: 236px;
  background: var(--panel-bg);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid var(--panel-border);
  border-radius: 14px;
  padding: 10px;
  display: flex;
  flex-direction: column;
  z-index: 15;
  box-shadow: 0 10px 32px rgba(0, 0, 0, 0.45);
  transition: transform 0.28s cubic-bezier(0.16, 1, 0.3, 1), opacity 0.24s ease;
}

.organelle-sidebar.collapsed {
  transform: translateX(-120%);
  opacity: 0;
  pointer-events: none;
}

.sidebar-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 6px;
}

.sidebar-header-btns {
  display: flex;
  align-items: center;
  gap: 5px;
}

.btn-collapse {
  width: 24px;
  height: 24px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 6px;
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(148, 163, 184, 0.28);
  color: #cbd5e1;
  font-size: 0.72rem;
  cursor: pointer;
  transition: all 0.16s ease;
}

.btn-collapse:hover {
  background: rgba(56, 189, 248, 0.22);
  border-color: #38bdf8;
  color: #ffffff;
}

.btn-collapse-bottom {
  width: auto;
  padding: 2px 8px;
  font-size: 0.7rem;
}

/* Collapsed mini triggers */
.panel-trigger {
  position: fixed;
  z-index: 14;
  padding: 7px 14px;
  border-radius: 999px;
  background: var(--panel-bg);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border: 1px solid var(--panel-border-strong);
  color: #f1f5f9;
  font-size: 0.75rem;
  font-weight: 700;
  box-shadow: 0 6px 22px rgba(0, 0, 0, 0.45);
  cursor: pointer;
  transition: all 0.2s cubic-bezier(0.16, 1, 0.3, 1);
}

.panel-trigger:hover {
  background: rgba(20, 36, 66, 0.95);
  border-color: #38bdf8;
  color: #38bdf8;
  transform: scale(1.05);
}

.panel-trigger.hidden {
  display: none !important;
}

.trigger-left {
  top: 96px;
  left: 16px;
}

.trigger-right {
  top: 96px;
  right: 16px;
}

.trigger-bottom {
  bottom: 12px;
  left: 50%;
  transform: translateX(-50%);
}

.trigger-bottom:hover {
  transform: translateX(-50%) scale(1.05);
}

.sidebar-title {
  font-size: 0.84rem;
  font-weight: 700;
  color: #e2e8f0;
}

.btn-reset-focus {
  padding: 4px 10px;
  font-size: 0.72rem;
  font-weight: 600;
  color: #38bdf8;
  background: rgba(56, 189, 248, 0.14);
  border: 1px solid rgba(56, 189, 248, 0.35);
  border-radius: 6px;
  cursor: pointer;
  transition: all 0.18s ease;
}

.btn-reset-focus:hover {
  background: rgba(56, 189, 248, 0.28);
  color: #ffffff;
}

.sidebar-hint {
  font-size: 0.7rem;
  color: var(--text-muted);
  margin-bottom: 10px;
  line-height: 1.35;
}

.organelle-list {
  flex: 1;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  gap: 5px;
  padding-right: 4px;
}

.organelle-list::-webkit-scrollbar {
  width: 5px;
}
.organelle-list::-webkit-scrollbar-thumb {
  background: rgba(148, 163, 184, 0.25);
  border-radius: 4px;
}

.org-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 8px 10px;
  border-radius: 9px;
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid rgba(255, 255, 255, 0.06);
  color: var(--text-main);
  cursor: pointer;
  transition: all 0.18s ease;
  text-align: left;
}

.org-item:hover {
  background: rgba(56, 189, 248, 0.12);
  border-color: rgba(56, 189, 248, 0.35);
  transform: translateX(2px);
}

.org-item.active {
  background: linear-gradient(90deg, rgba(14, 116, 144, 0.55), rgba(30, 58, 138, 0.45));
  border-color: #38bdf8;
  box-shadow: 0 0 15px rgba(56, 189, 248, 0.28);
}

.org-item-left {
  display: flex;
  align-items: center;
  gap: 9px;
}

.org-swatch {
  width: 11px;
  height: 11px;
  border-radius: 50%;
  flex-shrink: 0;
}

.org-names {
  display: flex;
  flex-direction: column;
}

.org-zh {
  font-size: 0.82rem;
  font-weight: 600;
}

.org-en {
  font-size: 0.66rem;
  color: var(--text-muted);
}

.org-tag {
  font-size: 0.64rem;
  padding: 2px 6px;
  border-radius: 99px;
  font-weight: 600;
  white-space: nowrap;
}

.tag-cuttable {
  background: rgba(251, 146, 60, 0.18);
  color: #fdba74;
  border: 1px solid rgba(251, 146, 60, 0.38);
}

.tag-plant {
  background: rgba(52, 211, 153, 0.16);
  color: #6ee7b7;
  border: 1px solid rgba(52, 211, 153, 0.35);
}

.tag-animal {
  background: rgba(244, 114, 182, 0.16);
  color: #f9a8d4;
  border: 1px solid rgba(244, 114, 182, 0.35);
}

/* Right Info Panel */
.info-panel {
  position: fixed;
  top: 92px;
  right: 16px;
  bottom: 84px;
  width: 295px;
  background: var(--panel-bg);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid var(--panel-border);
  border-radius: 14px;
  padding: 14px;
  display: flex;
  flex-direction: column;
  gap: 10px;
  overflow-y: auto;
  z-index: 15;
  box-shadow: 0 10px 32px rgba(0, 0, 0, 0.45);
  transition: transform 0.28s cubic-bezier(0.16, 1, 0.3, 1), opacity 0.24s ease;
}

.info-panel.collapsed {
  transform: translateX(120%);
  opacity: 0;
  pointer-events: none;
}

.info-header-right {
  display: flex;
  align-items: center;
  gap: 6px;
}

.info-header-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 8px;
}

.info-badge {
  font-size: 0.7rem;
  font-weight: 700;
  padding: 3px 9px;
  border-radius: 99px;
  background: rgba(56, 189, 248, 0.15);
  color: #7dd3fc;
  border: 1px solid rgba(56, 189, 248, 0.3);
}

.info-status-pill {
  font-size: 0.68rem;
  font-weight: 600;
  padding: 2px 8px;
  border-radius: 99px;
  background: rgba(251, 146, 60, 0.16);
  color: #fdba74;
  border: 1px solid rgba(251, 146, 60, 0.35);
}

.info-title {
  font-size: 1.25rem;
  font-weight: 800;
  color: #ffffff;
  line-height: 1.2;
}

.info-en {
  font-size: 0.8rem;
  font-family: var(--font-mono);
  color: #38bdf8;
  margin-top: -6px;
}

.info-desc {
  font-size: 0.82rem;
  line-height: 1.58;
  color: #cbd5e1;
}

/* Sub-structure Inspector */
.substructure-box {
  background: rgba(15, 23, 42, 0.72);
  border: 1px solid rgba(56, 189, 248, 0.25);
  border-radius: 10px;
  padding: 11px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.substructure-header {
  font-size: 0.75rem;
  font-weight: 700;
  color: #7dd3fc;
}

.substructure-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.sub-chip {
  padding: 5px 10px;
  border-radius: 7px;
  font-size: 0.74rem;
  font-weight: 600;
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(148, 163, 184, 0.28);
  color: #e2e8f0;
  cursor: pointer;
  transition: all 0.16s ease;
}

.sub-chip:hover {
  background: rgba(56, 189, 248, 0.2);
  border-color: #38bdf8;
  color: #ffffff;
}

.sub-chip.active {
  background: rgba(245, 158, 11, 0.28);
  border-color: #fbbf24;
  color: #fef3c7;
  box-shadow: 0 0 12px rgba(251, 191, 36, 0.35);
}

.substructure-detail {
  font-size: 0.76rem;
  line-height: 1.5;
  color: #e2e8f0;
  background: rgba(255, 255, 255, 0.03);
  border-left: 3px solid #38bdf8;
  padding: 7px 9px;
  border-radius: 0 6px 6px 0;
}

/* Feature Card */
.feature-card {
  margin-top: auto;
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 10px;
  padding: 10px 12px;
  display: flex;
  flex-direction: column;
  gap: 7px;
}

.feature-row {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 10px;
  font-size: 0.76rem;
}

.feature-label {
  color: var(--text-muted);
  flex-shrink: 0;
}

.feature-val {
  color: #f1f5f9;
  font-weight: 600;
  text-align: right;
}

/* Bottom Bar */
.bottom-bar {
  position: fixed;
  left: 50%;
  transform: translateX(-50%);
  width: auto;
  max-width: calc(100vw - 32px);
  bottom: 12px;
  background: var(--panel-bg);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid var(--panel-border);
  border-radius: 14px;
  padding: 8px 16px;
  z-index: 15;
  box-shadow: 0 10px 32px rgba(0, 0, 0, 0.5);
  transition: transform 0.28s cubic-bezier(0.16, 1, 0.3, 1), opacity 0.24s ease;
}

.bottom-bar.collapsed {
  transform: translateX(-50%) translateY(140%);
  opacity: 0;
  pointer-events: none;
}

.bottom-bar-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 5px;
  padding-bottom: 3px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.07);
}

.bottom-bar-title {
  font-size: 0.7rem;
  font-weight: 700;
  color: var(--text-muted);
  letter-spacing: 0.04em;
}

.controls-row {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  flex-wrap: nowrap;
}

.control-group {
  display: flex;
  flex-direction: column;
  gap: 5px;
}

.highlight-group {
  padding: 4px 10px;
  border-radius: 10px;
  background: rgba(251, 146, 60, 0.07);
  border: 1px solid rgba(251, 146, 60, 0.25);
}

.group-label {
  font-size: 0.7rem;
  font-weight: 700;
  color: var(--text-muted);
  letter-spacing: 0.03em;
}

.highlight-group .group-label {
  color: #fdba74;
}

.btn-segmented {
  display: flex;
  background: rgba(6, 10, 20, 0.65);
  border: 1px solid rgba(148, 163, 184, 0.2);
  border-radius: 8px;
  padding: 2px;
  gap: 2px;
}

.seg-btn {
  padding: 5px 11px;
  border: none;
  border-radius: 6px;
  background: transparent;
  color: var(--text-muted);
  font-size: 0.76rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.16s ease;
  white-space: nowrap;
}

.seg-btn:hover {
  color: #ffffff;
}

.seg-btn.active {
  background: #0284c7;
  color: #ffffff;
  box-shadow: 0 2px 8px rgba(2, 132, 199, 0.45);
}

.highlight-group .seg-btn.active {
  background: #ea580c;
  box-shadow: 0 2px 10px rgba(234, 88, 12, 0.5);
}

.slider-group {
  min-width: 170px;
  flex: 1;
  max-width: 240px;
}

.slider-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.slider-val {
  font-family: var(--font-mono);
  font-size: 0.74rem;
  color: #38bdf8;
  font-weight: 700;
}

.cut-slider {
  width: 100%;
  accent-color: #38bdf8;
  cursor: pointer;
  height: 6px;
}

.toggles-group {
  flex-direction: row;
  align-items: center;
  gap: 8px;
}

.toggle-btn {
  padding: 7px 12px;
  border-radius: 8px;
  border: 1px solid rgba(148, 163, 184, 0.28);
  background: rgba(255, 255, 255, 0.05);
  color: #e2e8f0;
  font-size: 0.76rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.18s ease;
  white-space: nowrap;
}

.toggle-btn:hover {
  background: rgba(56, 189, 248, 0.18);
  border-color: #38bdf8;
  color: #ffffff;
}

.toggle-btn.active {
  background: rgba(56, 189, 248, 0.24);
  border-color: #38bdf8;
  color: #7dd3fc;
}

/* Responsive adjustments */
@media (max-width: 1100px) {
  .organelle-sidebar {
    width: 210px;
  }
  .info-panel {
    width: 265px;
  }
}

@media (max-width: 820px) {
  .organelle-sidebar {
    display: none;
  }
  .info-panel {
    top: auto;
    bottom: 92px;
    left: 12px;
    right: 12px;
    width: auto;
    max-height: 36vh;
  }
}