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

:root {
  --bg:        #03040a;
  --panel:     rgba(5, 6, 14, 0.82);
  --border:    rgba(0, 212, 255, 0.1);
  --border-h:  rgba(0, 212, 255, 0.25);
  --text:      #d8e8f0;
  --text-dim:  #6a7f96;
  --text-muted:#4a5f70;
  --cyan:      #00d4ff;
  --cyan-dim:  rgba(0, 212, 255, 0.15);
  --cyan-glow: rgba(0, 212, 255, 0.25);
  --amber:     #f59e0b;
  --radius:    10px;
  --radius-sm: 7px;
  --mono:      'JetBrains Mono', monospace;
  --blur:      blur(18px) saturate(180%);
  --trans:     0.2s cubic-bezier(0.4, 0, 0.2, 1);
}

html, body {
  width: 100%; height: 100%;
  overflow: hidden;
  font-family: 'Inter', -apple-system, sans-serif;
  background: var(--bg);
  color: var(--text);
}
.mono { font-family: var(--mono); }
.cyan { color: var(--cyan); }
.hidden { display: none !important; }

/* ─── Viewport canvas ───────────────────────────────────────────────────────*/
#viewport {
  position: fixed; inset: 0;
  width: 100%; height: 100%;
  display: block;
  touch-action: none;
}

/* ─── Top bar ───────────────────────────────────────────────────────────────*/
#topbar {
  position: fixed; top: 0; left: 0; right: 0; z-index: 100;
  height: 56px;
  background: var(--panel);
  backdrop-filter: var(--blur);
  border-bottom: 1px solid var(--border);
  display: flex; align-items: center;
  padding: 0 16px; gap: 12px;
}

.back-btn {
  display: flex; align-items: center; gap: 6px;
  font-size: 0.8rem; font-weight: 500;
  color: var(--text-dim); text-decoration: none;
  padding: 6px 10px; border-radius: var(--radius-sm);
  border: 1px solid transparent;
  transition: var(--trans); white-space: nowrap;
  flex-shrink: 0;
}
.back-btn:hover { color: var(--cyan); border-color: var(--border); }
.back-btn svg { width: 14px; height: 14px; }

.topbar-center {
  display: flex; align-items: center; gap: 12px;
  flex: 1;
}
.viewer-title {
  font-size: 0.875rem; font-weight: 600;
  color: var(--cyan);
  text-shadow: 0 0 16px var(--cyan-glow);
}
.format-list {
  display: flex; gap: 5px;
}
.format-list span {
  font-family: var(--mono); font-size: 0.65rem; font-weight: 500;
  color: var(--text-dim);
  background: rgba(255,255,255,0.04);
  border: 1px solid var(--border);
  padding: 2px 7px; border-radius: 8px;
}

.topbar-tools {
  display: flex; align-items: center; gap: 6px;
  flex-shrink: 0;
}

/* ─── Custom tooltips (data-tip) ────────────────────────────────────────────*/
[data-tip] { position: relative; }
[data-tip]::after {
  content: attr(data-tip);
  position: absolute;
  top: calc(100% + 9px);
  left: 50%; transform: translateX(-50%);
  background: rgba(5, 8, 22, 0.97);
  border: 1px solid var(--border-h);
  border-radius: var(--radius-sm);
  color: var(--text);
  font-size: 0.7rem; font-weight: 500; letter-spacing: 0.02em;
  white-space: nowrap;
  padding: 4px 9px;
  pointer-events: none;
  opacity: 0;
  transition: opacity 0.12s;
  transition-delay: 0s;
  z-index: 700;
}
[data-tip]::before {
  content: '';
  position: absolute;
  top: calc(100% + 3px);
  left: 50%; transform: translateX(-50%);
  border: 5px solid transparent;
  border-bottom-color: var(--border-h);
  pointer-events: none;
  opacity: 0;
  transition: opacity 0.12s;
  transition-delay: 0s;
  z-index: 701;
}
[data-tip]:hover::after,
[data-tip]:hover::before {
  opacity: 1;
  transition-delay: 0.45s;
}

.tool-btn {
  width: 34px; height: 34px;
  display: flex; align-items: center; justify-content: center;
  background: rgba(255,255,255,0.04);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text-dim); cursor: pointer;
  transition: var(--trans);
}
.tool-btn:hover { color: var(--cyan); border-color: var(--border-h); }
.tool-btn.active {
  color: var(--cyan); border-color: rgba(0,212,255,0.35);
  background: var(--cyan-dim);
  box-shadow: 0 0 12px rgba(0,212,255,0.15);
}
.tool-btn svg { width: 15px; height: 15px; }

.import-btn {
  display: flex; align-items: center; gap: 7px;
  padding: 0 16px; height: 34px;
  background: var(--cyan); color: #000;
  border: none; border-radius: var(--radius-sm);
  font-size: 0.8rem; font-weight: 700;
  cursor: pointer; transition: var(--trans);
  box-shadow: 0 0 18px var(--cyan-glow);
  white-space: nowrap;
}
.import-btn:hover { transform: translateY(-1px); box-shadow: 0 4px 28px var(--cyan-glow); }
.import-btn svg { width: 14px; height: 14px; }


/* ─── Info panel (inside parts panel) ───────────────────────────────────────*/
#info-panel {
  padding: 10px 14px;
  display: flex; flex-direction: column; gap: 6px;
  flex-shrink: 0;
}
.info-row {
  display: flex; align-items: baseline; justify-content: space-between; gap: 16px;
}
.info-label {
  font-size: 0.65rem; font-weight: 500; letter-spacing: 0.06em;
  text-transform: uppercase; color: var(--text-dim); flex-shrink: 0;
}
.info-val {
  font-size: 0.78rem; font-weight: 500; color: var(--text);
  text-align: right; word-break: break-all;
}
.info-val.cyan { color: var(--cyan); font-family: var(--mono); }
.info-divider {
  height: 1px; background: var(--border); margin: 2px 0;
}
.dims-right {
  display: flex; align-items: center; gap: 8px;
}
.dim-toggle-btn {
  font-size: 0.62rem; font-weight: 700; font-family: var(--mono);
  padding: 2px 7px; border-radius: 5px;
  border: 1px solid var(--border);
  background: transparent; color: var(--text-dim);
  cursor: pointer; transition: var(--trans); white-space: nowrap;
  text-transform: uppercase; letter-spacing: 0.05em;
}
.dim-toggle-btn:hover:not(:disabled) { color: var(--cyan); border-color: var(--border-h); }
.dim-toggle-btn.active {
  color: var(--cyan); border-color: rgba(0,212,255,0.35);
  background: var(--cyan-dim);
}
.dim-toggle-btn:disabled { opacity: 0.3; cursor: not-allowed; }

/* ─── 3D Dimension labels (CSS2DRenderer) ───────────────────────────────────*/
.dim-label {
  display: flex; align-items: center; gap: 5px;
  background: rgba(3, 4, 14, 0.88);
  border: 1px solid rgba(0, 212, 255, 0.4);
  border-radius: 5px;
  padding: 3px 8px;
  font-family: 'JetBrains Mono', monospace;
  white-space: nowrap;
  pointer-events: none;
  box-shadow: 0 0 10px rgba(0, 212, 255, 0.15);
  transform: translate(-50%, -50%);
}
.dim-axis {
  font-size: 0.6rem; font-weight: 700;
  color: rgba(0, 212, 255, 0.55);
  text-transform: uppercase; letter-spacing: 0.08em;
}
.dim-val {
  font-size: 0.72rem; font-weight: 600;
  color: #00d4ff;
}

/* ─── Drop zone ─────────────────────────────────────────────────────────────*/
#drop-zone {
  position: fixed; inset: 56px 0 0 0; z-index: 50;
  display: flex; align-items: center; justify-content: center;
  pointer-events: none;
}
#drop-zone.drag-over {
  background: rgba(0,212,255,0.04);
  border: 2px dashed rgba(0,212,255,0.4);
}
.drop-inner {
  text-align: center;
  display: flex; flex-direction: column; align-items: center; gap: 10px;
}
.drop-icon {
  width: 80px; height: 80px; color: rgba(0,212,255,0.35);
  margin-bottom: 6px;
  animation: floatIcon 4s ease-in-out infinite;
}
.drop-icon svg { width: 100%; height: 100%; }
#drop-zone h2 {
  font-size: 1.2rem; font-weight: 700;
  color: var(--text);
}
#drop-zone p {
  font-size: 0.85rem; color: var(--text-dim);
}
.drop-formats {
  display: flex; gap: 6px; margin-top: 6px;
}
.drop-formats span {
  font-family: var(--mono); font-size: 0.7rem;
  padding: 3px 10px; border-radius: 12px;
  background: var(--cyan-dim);
  border: 1px solid rgba(0,212,255,0.22);
  color: var(--cyan);
}
.drop-hint {
  font-size: 0.72rem; color: var(--text-dim); opacity: 0.6;
  margin-top: 8px;
}

@keyframes floatIcon {
  0%, 100% { transform: translateY(0); }
  50%       { transform: translateY(-10px); }
}

/* ─── Loading overlay ───────────────────────────────────────────────────────*/
#loading-overlay {
  position: fixed; inset: 0; z-index: 200;
  display: flex; flex-direction: column;
  align-items: center; justify-content: center; gap: 16px;
  background: rgba(3,4,10,0.75);
  backdrop-filter: blur(6px);
}
.spinner {
  width: 40px; height: 40px;
  border: 2px solid var(--border);
  border-top-color: var(--cyan);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
  box-shadow: 0 0 20px var(--cyan-glow);
}
@keyframes spin { to { transform: rotate(360deg); } }
#loading-text {
  font-family: var(--mono); font-size: 0.82rem;
  color: var(--cyan); letter-spacing: 0.06em;
}

/* ─── Error toast ───────────────────────────────────────────────────────────*/
#error-toast {
  position: fixed; top: 72px; left: 50%; transform: translateX(-50%);
  z-index: 300;
  background: rgba(239,68,68,0.15);
  border: 1px solid rgba(239,68,68,0.35);
  color: #fca5a5;
  padding: 10px 16px 10px 20px; border-radius: var(--radius);
  font-size: 0.82rem;
  backdrop-filter: var(--blur);
  animation: toastIn 0.2s ease;
  display: flex; align-items: center; gap: 12px;
  max-width: min(90vw, 600px);
}
#error-text { white-space: pre-line; }
#error-toast #error-close {
  flex-shrink: 0;
  background: none; border: none; cursor: pointer;
  color: #fca5a5; font-size: 1.2rem; line-height: 1;
  padding: 0 2px; opacity: 0.7;
}
#error-toast #error-close:hover { opacity: 1; }
@keyframes toastIn { from { opacity: 0; transform: translateX(-50%) translateY(-8px); } }

/* ─── Parts Panel ───────────────────────────────────────────────────────────*/
#parts-panel {
  position: fixed;
  top: 56px; left: 0; bottom: 0;
  width: 300px;
  z-index: 90;
  display: flex; flex-direction: column;
  background: rgba(4, 5, 14, 0.94);
  backdrop-filter: var(--blur);
  border-right: 1px solid var(--border);
  transform: translateX(-100%);
  transition: transform 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}
#parts-panel.open { transform: translateX(0); }

.parts-header {
  display: flex; align-items: center; justify-content: space-between;
  padding: 12px 14px;
  border-bottom: 1px solid var(--border);
  flex-shrink: 0;
}
.parts-title {
  display: flex; align-items: center; gap: 8px;
  font-size: 0.82rem; font-weight: 600; color: var(--text);
}
.parts-title svg { width: 14px; height: 14px; color: var(--cyan); }
.parts-badge {
  font-family: var(--mono); font-size: 0.68rem; font-weight: 700;
  background: var(--cyan-dim); color: var(--cyan);
  border: 1px solid rgba(0,212,255,0.25);
  padding: 1px 7px; border-radius: 10px;
}
.parts-header-actions { display: flex; align-items: center; gap: 4px; }
.parts-action-btn {
  width: 26px; height: 26px;
  display: flex; align-items: center; justify-content: center;
  background: none; border: none; cursor: pointer;
  color: var(--text-muted); border-radius: 5px;
  transition: var(--trans);
}
.parts-action-btn:hover { color: var(--cyan); background: var(--cyan-dim); }
.parts-action-btn svg { width: 13px; height: 13px; }
.parts-close-btn {
  width: 26px; height: 26px;
  display: flex; align-items: center; justify-content: center;
  background: none; border: none; cursor: pointer;
  color: var(--text-muted); border-radius: 5px;
  transition: var(--trans); margin-left: 2px;
}
.parts-close-btn:hover { color: var(--text); background: rgba(255,255,255,0.06); }
.parts-close-btn svg { width: 14px; height: 14px; }

.parts-summary {
  display: flex; gap: 0;
  border-bottom: 1px solid var(--border);
  flex-shrink: 0;
}
.ps-stat {
  flex: 1; display: flex; flex-direction: column; align-items: center;
  padding: 8px 6px; gap: 2px;
  border-right: 1px solid var(--border);
}
.ps-stat:last-child { border-right: none; }
.ps-label { font-size: 0.6rem; color: var(--text-muted); text-transform: uppercase; letter-spacing: 0.08em; }
.ps-val   { font-size: 0.75rem; font-weight: 600; color: var(--cyan); font-family: var(--mono); }

/* ─── Scene Graph Tree ──────────────────────────────────────────────────────*/
.sg-container {
  flex: 1; overflow-y: auto; overflow-x: hidden; padding: 4px 0;
}
.sg-container::-webkit-scrollbar { width: 4px; }
.sg-container::-webkit-scrollbar-track { background: transparent; }
.sg-container::-webkit-scrollbar-thumb { background: rgba(0,212,255,0.2); border-radius: 2px; }

.sg-item { display: flex; flex-direction: column; }

.sg-row {
  display: flex; align-items: center; gap: 4px;
  padding: 4px 10px 4px 0;
  border-radius: 5px; margin: 1px 4px;
  min-height: 26px; transition: background 0.12s; cursor: default;
}
.sg-row:hover { background: rgba(0,212,255,0.06); }
.sg-row.sg-selected { background: rgba(0,212,255,0.12); }
.sg-row.sg-hidden-row { opacity: 0.35; }

.sg-arrow-btn {
  width: 14px; height: 14px; flex-shrink: 0;
  background: none; border: none; cursor: pointer; padding: 0;
  color: var(--text-dim); border-radius: 3px;
  display: flex; align-items: center; justify-content: center;
  transform: rotate(0deg);
  transition: transform 0.15s ease, color 0.12s;
}
.sg-arrow-btn svg { width: 9px; height: 9px; }
.sg-arrow-btn.expanded { transform: rotate(90deg); }
.sg-arrow-btn:hover { color: var(--cyan); }
.sg-arrow-spacer { width: 14px; height: 14px; flex-shrink: 0; display: inline-block; }

.sg-icon {
  width: 14px; height: 14px; flex-shrink: 0;
  display: flex; align-items: center; justify-content: center;
}
.sg-icon svg { width: 12px; height: 12px; }

.sg-name {
  flex: 1; font-size: 0.78rem; color: var(--text);
  overflow: hidden; text-overflow: ellipsis; white-space: nowrap; min-width: 0;
}
.sg-row.sg-selected .sg-name { color: var(--cyan); }

.sg-meta {
  font-size: 0.62rem; color: var(--text-dim); white-space: nowrap; flex-shrink: 0;
}

.sg-vis-btn {
  width: 18px; height: 18px; flex-shrink: 0;
  background: none; border: none; cursor: pointer; padding: 0;
  color: var(--text-dim); border-radius: 3px;
  display: flex; align-items: center; justify-content: center;
  transition: var(--trans); opacity: 0;
}
.sg-row:hover .sg-vis-btn,
.sg-row.sg-selected .sg-vis-btn { opacity: 1; }
.sg-row.sg-hidden-row .sg-vis-btn { opacity: 1; }
.sg-vis-btn:hover { color: var(--cyan); }
.sg-vis-btn svg { width: 11px; height: 11px; }
.sg-more-btn {
  opacity: 0; flex-shrink: 0;
  width: 20px; height: 20px;
  display: flex; align-items: center; justify-content: center;
  background: none; border: none; cursor: pointer;
  color: var(--text-dim); border-radius: 4px;
  transition: opacity 0.15s, color 0.15s, background 0.15s;
}
.sg-row:hover .sg-more-btn,
.sg-row.sg-selected .sg-more-btn,
.sg-more-btn.sg-mode-open { opacity: 1; }
.sg-more-btn:hover, .sg-more-btn.sg-mode-open { color: var(--cyan); background: var(--cyan-dim); }

#sg-mode-popup {
  position: fixed; z-index: 600;
  min-width: 140px;
  background: rgba(5, 8, 22, 0.97);
  border: 1px solid var(--border-h);
  border-radius: var(--radius-sm);
  padding: 4px;
  box-shadow: 0 8px 32px rgba(0,0,0,0.55), 0 0 24px rgba(0,212,255,0.07);
  backdrop-filter: var(--blur);
}
.sg-mode-section {
  font-size: 0.62rem; font-weight: 700; letter-spacing: 0.07em;
  text-transform: uppercase; color: var(--text-muted);
  padding: 5px 10px 2px;
}
.sg-mode-opt {
  display: flex; align-items: center; gap: 8px;
  width: 100%; padding: 6px 10px;
  background: none; border: none; cursor: pointer;
  color: var(--text); font-size: 0.78rem; font-family: inherit;
  border-radius: 5px; text-align: left;
  transition: background 0.1s, color 0.1s;
}
.sg-mode-opt:hover { background: var(--cyan-dim); color: var(--cyan); }
.sg-mode-dot {
  width: 7px; height: 7px; flex-shrink: 0;
  border-radius: 50%; border: 1.5px solid var(--text-dim);
}
.sg-mode-opt.active .sg-mode-dot { background: var(--amber); border-color: var(--amber); }
.sg-mode-sep { height: 1px; background: var(--border); margin: 3px 0; }

.sg-children { display: block; }
.sg-children.collapsed { display: none; }

.parts-empty {
  display: flex; flex-direction: column; align-items: center; justify-content: center;
  padding: 40px 20px; text-align: center; gap: 6px;
}
.parts-empty p { font-size: 0.8rem; color: var(--text-muted); }

/* ─── MTL Prompt ────────────────────────────────────────────────────────────*/
#mtl-prompt, #export-dialog, #create-dialog {
  position: fixed; inset: 0; z-index: 250;
  display: flex; align-items: center; justify-content: center;
  background: rgba(3, 4, 10, 0.72);
  backdrop-filter: blur(10px);
}
.export-dialog-wide { width: min(360px, 92vw); }
.export-name-wrap {
  width: 100%; display: flex; flex-direction: column; gap: 5px; text-align: left;
}
.export-name-label {
  font-size: 0.7rem; font-weight: 600; letter-spacing: 0.06em;
  text-transform: uppercase; color: var(--text-dim);
}
.export-name-field {
  display: flex; align-items: center;
  background: rgba(255,255,255,0.04); border: 1px solid var(--border-h);
  border-radius: var(--radius-sm); overflow: hidden;
}
.export-name-input {
  flex: 1; background: transparent; border: none; outline: none;
  color: var(--text); font-size: 0.85rem; font-family: var(--mono);
  padding: 8px 10px; min-width: 0;
}
.export-name-input:focus { box-shadow: none; }
.export-ext {
  padding: 0 10px; font-size: 0.78rem; font-family: var(--mono);
  color: var(--cyan); border-left: 1px solid var(--border); white-space: nowrap;
}
.export-scope {
  width: 100%; display: flex; flex-direction: column; gap: 6px;
}
.export-scope-label {
  font-size: 0.78rem; color: var(--text-dim); text-align: left;
}
.export-scope-btns { display: flex; gap: 6px; }
.scope-btn {
  flex: 1; height: 30px;
  background: rgba(255,255,255,0.04); border: 1px solid var(--border);
  border-radius: var(--radius-sm); color: var(--text-dim);
  font-size: 0.8rem; cursor: pointer; transition: var(--trans);
}
.scope-btn.active {
  background: var(--cyan-dim); border-color: var(--border-h); color: var(--cyan);
}
.mtl-dialog {
  background: rgba(5, 8, 22, 0.97);
  border: 1px solid var(--border-h);
  border-radius: var(--radius);
  padding: 30px 32px 26px;
  width: min(340px, 90vw);
  display: flex; flex-direction: column; align-items: center; gap: 10px;
  text-align: center;
  box-shadow: 0 0 60px rgba(0,212,255,0.12), 0 24px 48px rgba(0,0,0,0.5);
}
.mtl-dialog-icon {
  width: 48px; height: 48px;
  background: var(--cyan-dim); border: 1px solid rgba(0,212,255,0.3);
  border-radius: 12px;
  display: flex; align-items: center; justify-content: center;
  color: var(--cyan); margin-bottom: 4px;
}
.mtl-dialog-icon svg { width: 22px; height: 22px; }
.mtl-dialog h3 { font-size: 1rem; font-weight: 700; color: var(--text); }
.mtl-dialog p  { font-size: 0.8rem; color: var(--text-dim); line-height: 1.55; }
.mtl-dialog-actions {
  display: flex; gap: 10px; width: 100%; margin-top: 8px;
}
.mtl-primary-btn {
  flex: 1; display: flex; align-items: center; justify-content: center; gap: 7px;
  height: 38px; padding: 0 16px;
  background: var(--cyan); color: #000;
  border: none; border-radius: var(--radius-sm);
  font-size: 0.82rem; font-weight: 700; cursor: pointer;
  transition: var(--trans); box-shadow: 0 0 18px var(--cyan-glow);
}
.mtl-primary-btn:hover { transform: translateY(-1px); box-shadow: 0 4px 28px var(--cyan-glow); }
.mtl-primary-btn svg { width: 13px; height: 13px; }
.mtl-skip-btn {
  height: 38px; padding: 0 18px;
  background: rgba(255,255,255,0.04);
  border: 1px solid var(--border); border-radius: var(--radius-sm);
  color: var(--text-dim); font-size: 0.82rem; cursor: pointer;
  transition: var(--trans); white-space: nowrap;
}
.mtl-skip-btn:hover { color: var(--text); border-color: var(--border-h); }

/* ─── Create Geometry dialog ────────────────────────────────────────────────*/
.create-dialog-wide { width: min(380px, 92vw); }
.geo-type-btns { display: flex; gap: 6px; width: 100%; }
.geo-type-btn {
  flex: 1; height: 30px;
  background: rgba(255,255,255,0.04); border: 1px solid var(--border);
  border-radius: var(--radius-sm); color: var(--text-dim);
  font-size: 0.8rem; cursor: pointer; transition: var(--trans);
}
.geo-type-btn.active {
  background: var(--cyan-dim); border-color: var(--border-h); color: var(--cyan);
}
.geo-params { width: 100%; display: flex; flex-direction: column; gap: 8px; }
.geo-param-row {
  display: flex; align-items: center; justify-content: space-between; gap: 10px;
}
.geo-param-label {
  font-size: 0.78rem; color: var(--text-dim); white-space: nowrap;
}
.geo-input {
  width: 90px; height: 28px; padding: 0 8px;
  background: rgba(255,255,255,0.04); border: 1px solid var(--border-h);
  border-radius: var(--radius-sm); color: var(--text);
  font-size: 0.82rem; font-family: var(--mono);
  text-align: right; outline: none;
}
.geo-input:focus { border-color: var(--cyan); }
.geo-plane-btns { display: flex; gap: 4px; }
.geo-plane-btn {
  width: 36px; height: 28px;
  background: rgba(255,255,255,0.04); border: 1px solid var(--border);
  border-radius: var(--radius-sm); color: var(--text-dim);
  font-size: 0.78rem; font-family: var(--mono); cursor: pointer;
  transition: var(--trans);
}
.geo-plane-btn.active {
  background: var(--cyan-dim); border-color: var(--border-h); color: var(--cyan);
}
.geo-param-divider {
  border-top: 1px solid var(--border); padding-top: 8px; margin-top: 2px;
}

/* ─── Normals display panel ─────────────────────────────────────────────────*/
.normals-wrap { position: relative; }
.normals-panel {
  position: absolute;
  top: calc(100% + 8px); left: 50%; transform: translateX(-50%);
  z-index: 400;
  background: rgba(5, 8, 22, 0.97);
  border: 1px solid var(--border-h); border-radius: var(--radius);
  padding: 10px;
  box-shadow: 0 8px 32px rgba(0,0,0,0.55), 0 0 24px rgba(0,212,255,0.07);
  backdrop-filter: var(--blur);
  min-width: 158px;
}
.normals-panel-title {
  font-size: 0.62rem; font-weight: 700;
  text-transform: uppercase; letter-spacing: 0.09em;
  color: var(--text-muted); margin-bottom: 8px; text-align: center;
}
.normals-toggle-btn {
  display: flex; align-items: center; gap: 8px; width: 100%;
  padding: 6px 8px; margin-bottom: 4px;
  background: rgba(255,255,255,0.04); border: 1px solid var(--border);
  border-radius: var(--radius-sm); color: var(--text-dim);
  font-size: 0.8rem; cursor: pointer; transition: var(--trans); white-space: nowrap;
}
.normals-toggle-btn:last-child { margin-bottom: 0; }
.normals-toggle-btn.active { border-color: var(--border-h); color: var(--text); background: rgba(255,255,255,0.08); }
.normals-dot { width: 8px; height: 8px; border-radius: 50%; flex-shrink: 0; }

/* ─── Background picker ─────────────────────────────────────────────────────*/
.bg-wrap {
  position: relative;
}
.bg-panel {
  position: absolute;
  top: calc(100% + 8px);
  left: 50%; transform: translateX(-50%);
  z-index: 400;
  background: rgba(5, 8, 22, 0.97);
  border: 1px solid var(--border-h);
  border-radius: var(--radius);
  padding: 10px;
  box-shadow: 0 8px 32px rgba(0,0,0,0.55), 0 0 24px rgba(0,212,255,0.07);
  backdrop-filter: var(--blur);
}
.bg-panel-title {
  font-size: 0.62rem; font-weight: 700;
  text-transform: uppercase; letter-spacing: 0.09em;
  color: var(--text-muted);
  margin-bottom: 8px;
  text-align: center;
}
.bg-swatches {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 5px;
}
.bg-swatch {
  width: 48px; height: 40px;
  border-radius: 6px;
  border: 2px solid transparent;
  cursor: pointer;
  transition: border-color 0.15s, transform 0.15s;
  position: relative; overflow: hidden;
}
.bg-swatch:hover  { transform: scale(1.06); border-color: rgba(0,212,255,0.4); }
.bg-swatch.active { border-color: var(--cyan); box-shadow: 0 0 8px var(--cyan-glow); }
.bg-swatch-label {
  position: absolute; bottom: 2px; left: 0; right: 0;
  text-align: center;
  font-size: 0.52rem; font-weight: 600; font-family: var(--mono);
  color: rgba(255,255,255,0.7);
  text-shadow: 0 1px 3px rgba(0,0,0,0.8);
  letter-spacing: 0.04em; text-transform: uppercase;
}

/* ─── Export dropdown ───────────────────────────────────────────────────────*/
/* ─── Import dropdown ────────────────────────────────────────────────────────*/
.import-wrap {
  position: relative;
}
.import-dropdown {
  position: absolute;
  top: calc(100% + 8px);
  right: 0;
  z-index: 400;
  min-width: 220px;
  background: rgba(5, 8, 22, 0.97);
  border: 1px solid var(--border-h);
  border-radius: var(--radius);
  padding: 4px;
  box-shadow: 0 8px 32px rgba(0,0,0,0.55), 0 0 24px rgba(0,212,255,0.07);
  backdrop-filter: var(--blur);
}
.import-header {
  font-size: 0.62rem; font-weight: 700;
  text-transform: uppercase; letter-spacing: 0.09em;
  color: var(--text-muted);
  padding: 6px 10px 4px;
}
.import-opt {
  display: flex; align-items: center; gap: 10px;
  width: 100%; padding: 8px 10px;
  background: none; border: none; cursor: pointer;
  border-radius: 6px;
  transition: background 0.1s;
  text-align: left;
  color: var(--text);
}
.import-opt:hover:not(:disabled) { background: var(--cyan-dim); }
.import-opt:hover:not(:disabled) .import-opt-icon { color: var(--cyan); }
.import-opt:disabled { opacity: 0.35; cursor: not-allowed; }
.import-opt-icon { width: 15px; height: 15px; flex-shrink: 0; color: var(--text-dim); transition: color 0.1s; }
.import-opt-label { font-size: 0.72rem; font-weight: 600; color: var(--text); }
.import-opt-desc { font-size: 0.65rem; color: var(--text-dim); margin-top: 1px; }

.export-wrap {
  position: relative;
}
.tool-btn:disabled,
.import-btn:disabled {
  opacity: 0.35;
  cursor: not-allowed;
  pointer-events: none;
}
.export-dropdown {
  position: absolute;
  top: calc(100% + 8px);
  right: 0;
  z-index: 400;
  min-width: 230px;
  background: rgba(5, 8, 22, 0.97);
  border: 1px solid var(--border-h);
  border-radius: var(--radius);
  padding: 4px;
  box-shadow: 0 8px 32px rgba(0,0,0,0.55), 0 0 24px rgba(0,212,255,0.07);
  backdrop-filter: var(--blur);
}
.export-header {
  font-size: 0.62rem; font-weight: 700;
  text-transform: uppercase; letter-spacing: 0.09em;
  color: var(--text-muted);
  padding: 6px 10px 4px;
}
.export-opt {
  display: flex; align-items: center; gap: 10px;
  width: 100%; padding: 8px 10px;
  background: none; border: none; cursor: pointer;
  border-radius: 6px;
  transition: background 0.1s;
  text-align: left;
}
.export-opt:hover { background: var(--cyan-dim); }
.export-opt:hover .export-ext { color: var(--cyan); }
.export-ext {
  font-family: var(--mono); font-size: 0.72rem; font-weight: 700;
  color: var(--text); min-width: 38px;
  transition: color 0.1s;
}
.export-desc {
  font-size: 0.72rem; color: var(--text-dim);
}

/* ─── Context Menu ──────────────────────────────────────────────────────────*/
#ctx-menu {
  position: fixed;
  z-index: 500;
  min-width: 210px;
  background: rgba(5, 8, 22, 0.97);
  border: 1px solid var(--border-h);
  border-radius: var(--radius-sm);
  padding: 4px;
  box-shadow: 0 8px 32px rgba(0,0,0,0.55), 0 0 24px rgba(0,212,255,0.07);
  backdrop-filter: var(--blur);
}
.ctx-item {
  display: flex; align-items: center; gap: 9px;
  width: 100%; padding: 7px 10px;
  background: none; border: none; cursor: pointer;
  color: var(--text); font-size: 0.78rem; font-family: inherit;
  border-radius: 5px; text-align: left;
  transition: background 0.1s, color 0.1s;
}
.ctx-item:hover { background: var(--cyan-dim); color: var(--cyan); }
.ctx-item:disabled, .ctx-item.ctx-disabled { opacity: 0.35; cursor: default; pointer-events: none; }
.ctx-item svg   { width: 13px; height: 13px; flex-shrink: 0; color: var(--text-dim); }
.ctx-item:hover svg { color: var(--cyan); }
.ctx-sep { height: 1px; background: var(--border); margin: 3px 0; }

.ctx-chevron { margin-left: auto; width: 10px !important; height: 10px !important; }
.ctx-kbd {
  margin-left: auto;
  font-size: 0.67rem; font-family: var(--mono);
  color: var(--text-dim);
  background: rgba(255,255,255,0.05);
  border: 1px solid var(--border);
  border-radius: 3px;
  padding: 1px 5px;
  line-height: 1.5;
  white-space: nowrap;
  flex-shrink: 0;
}
.ctx-sub-item .ctx-kbd { margin-left: auto; }
.ctx-has-sub { position: relative; }
.ctx-sub {
  display: none;
  position: absolute; left: 100%; top: -4px;
  margin-left: 5px;
  min-width: 148px;
  background: rgba(5, 8, 22, 0.97);
  border: 1px solid var(--border-h);
  border-radius: var(--radius-sm);
  padding: 4px;
  box-shadow: 0 8px 32px rgba(0,0,0,0.5);
}
.ctx-has-sub:hover .ctx-sub { display: block; }
.ctx-sub-item {
  display: flex; align-items: center; gap: 9px;
  width: 100%; padding: 7px 10px;
  background: none; border: none; cursor: pointer;
  color: var(--text); font-size: 0.78rem; font-family: inherit;
  border-radius: 5px;
  transition: background 0.1s, color 0.1s;
  min-width: 148px;
}
.ctx-sub-item:hover { background: var(--cyan-dim); color: var(--cyan); }
.ctx-dot {
  width: 7px; height: 7px; flex-shrink: 0;
  border-radius: 50%;
  border: 1.5px solid var(--text-dim);
}
.ctx-dot.active { background: var(--amber); border-color: var(--amber); }

/* ─── Animation timeline bar ────────────────────────────────────────────────*/
#anim-bar {
  position: fixed; bottom: 0; left: 0; right: 0;
  height: 50px;
  display: flex; align-items: center; gap: 12px;
  padding: 0 20px;
  background: rgba(5, 8, 20, 0.94);
  backdrop-filter: var(--blur);
  border-top: 1px solid var(--border);
  z-index: 90;
}

#anim-bar.anim-no-clips .anim-nav-btn,
#anim-bar.anim-no-clips .anim-play-btn,
#anim-bar.anim-no-clips #anim-scrubber,
#anim-bar.anim-no-clips .anim-clip-select {
  opacity: 0.35; cursor: not-allowed; pointer-events: none;
}

.anim-controls {
  display: flex; align-items: center; gap: 6px; flex-shrink: 0;
}
.anim-nav-btn {
  width: 30px; height: 30px;
  border-radius: 6px; border: 1px solid rgba(0,212,255,0.25);
  background: rgba(0,212,255,0.08); color: #a0c8d8;
  display: flex; align-items: center; justify-content: center;
  cursor: pointer; transition: var(--trans);
}
.anim-nav-btn:hover { background: var(--cyan-dim); color: var(--cyan); border-color: var(--cyan); }
.anim-nav-btn svg { width: 14px; height: 14px; }
.anim-play-btn {
  width: 30px; height: 30px; flex-shrink: 0;
  border-radius: 50%; border: none;
  background: var(--cyan); color: #000;
  display: flex; align-items: center; justify-content: center;
  cursor: pointer; transition: var(--trans);
  box-shadow: 0 0 12px var(--cyan-glow);
}
.anim-play-btn:hover { transform: scale(1.1); }
.anim-play-btn svg { width: 13px; height: 13px; }

.anim-clip-select {
  background: rgba(255,255,255,0.06);
  border: 1px solid var(--border); border-radius: 6px;
  color: var(--text); font-size: 0.78rem; font-family: inherit;
  padding: 4px 8px; cursor: pointer; max-width: 180px;
}
.anim-clip-select:focus { outline: 1px solid var(--border-h); }

.anim-frame {
  font-family: var(--mono); font-size: 0.77rem;
  color: var(--cyan); white-space: nowrap; min-width: 80px; text-align: center;
}

.anim-scrubber-wrap { flex: 1; display: flex; align-items: center; }

#anim-scrubber {
  width: 100%; height: 4px;
  -webkit-appearance: none; appearance: none;
  background: rgba(255,255,255,0.12); border-radius: 2px;
  outline: none; cursor: pointer;
}
#anim-scrubber::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 14px; height: 14px; border-radius: 50%;
  background: var(--cyan); box-shadow: 0 0 6px var(--cyan-glow); cursor: pointer;
}
#anim-scrubber::-moz-range-thumb {
  width: 14px; height: 14px; border-radius: 50%;
  background: var(--cyan); box-shadow: 0 0 6px var(--cyan-glow); cursor: pointer; border: none;
}

.anim-time {
  font-family: var(--mono); font-size: 0.75rem;
  color: var(--text-dim); white-space: nowrap; min-width: 120px; text-align: right;
}

/* ─── Responsive ────────────────────────────────────────────────────────────*/
@media (max-width: 600px) {
  .format-list { display: none; }
  .viewer-title { display: none; }
  #info-panel { display: none; }
}