:root {
  --bg: #eff4fb;
  --panel: #ffffff;
  --line: #d7deee;
  --line-strong: #b9c4db;
  --text: #1b2440;
  --muted: #66728e;
  --accent: #6b5dff;
  --accent-2: #8f80ff;
  --danger: #d95b7f;
  --shadow: 0 16px 36px rgba(39, 58, 102, 0.12);
}
* { box-sizing: border-box; }
html, body { margin: 0; height: 100%; font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif; color: var(--text); background: linear-gradient(180deg, #f5f8fd, #eef2fb); }
body { min-height: 100%; }
button, input, select, textarea { font: inherit; }
button { cursor: pointer; }
.app-shell { min-height: 100vh; display: flex; flex-direction: column; }
.topbar { display: flex; align-items: center; gap: 16px; justify-content: space-between; padding: 14px 18px; border-bottom: 1px solid var(--line); background: rgba(255,255,255,0.82); backdrop-filter: blur(12px); position: sticky; top: 0; z-index: 50; }
.brand-lockup { display: flex; align-items: center; gap: 14px; flex: 0 0 auto; }
.brand-gem { width: 52px; height: 52px; position: relative; filter: drop-shadow(0 8px 12px rgba(84, 63, 220, 0.18)); }
.brand-gem span { position: absolute; inset: 0; clip-path: polygon(50% 0%, 100% 35%, 82% 100%, 18% 100%, 0% 35%); background: linear-gradient(135deg, #ffe279, #f8a70f); }
.brand-gem span:nth-child(2) { clip-path: polygon(50% 0%, 100% 35%, 50% 48%); background: rgba(255,255,255,0.2); }
.brand-gem span:nth-child(3) { clip-path: polygon(18% 100%, 50% 48%, 82% 100%); background: rgba(145, 104, 0, 0.18); }
.brand-gem span:nth-child(4) { clip-path: polygon(0% 35%, 50% 0%, 50% 48%); background: rgba(255,255,255,0.12); }
.eyebrow { margin: 0; color: var(--muted); text-transform: uppercase; letter-spacing: .08em; font-size: 11px; font-weight: 700; }
.topbar h1 { margin: 0; font-size: 28px; line-height: 1; }
.toolbar { display: flex; flex-wrap: wrap; align-items: center; gap: 8px; justify-content: flex-end; }
.primary-button, .secondary-button, .icon-button { border-radius: 12px; border: 1px solid transparent; transition: .18s ease; }
.primary-button, .secondary-button { padding: 10px 14px; font-weight: 700; }
.icon-button { width: 40px; height: 40px; font-size: 20px; }
.primary-button { background: linear-gradient(135deg, var(--accent), var(--accent-2)); color: white; box-shadow: 0 8px 18px rgba(107, 93, 255, 0.22); }
.secondary-button, .icon-button { background: white; border-color: var(--line); color: var(--text); }
.secondary-button:hover, .icon-button:hover, .primary-button:hover { transform: translateY(-1px); }
.secondary-button.compact { padding: 8px 10px; font-size: 13px; }
.secondary-button.danger { color: var(--danger); }
.workspace { flex: 1; display: grid; grid-template-columns: 320px minmax(480px, 1fr) 360px; gap: 16px; padding: 16px; }
.sidebar { display: flex; flex-direction: column; gap: 16px; min-height: 0; }
.panel { background: var(--panel); border: 1px solid var(--line); border-radius: 20px; padding: 16px; box-shadow: var(--shadow); }
.panel-head { display: flex; flex-direction: column; gap: 4px; margin-bottom: 12px; }
.panel-head h2 { margin: 0; font-size: 18px; }
.panel-chip { display: inline-flex; align-items: center; padding: 4px 9px; width: fit-content; border-radius: 999px; font-size: 11px; letter-spacing: .04em; text-transform: uppercase; color: var(--accent); background: rgba(107,93,255,.1); font-weight: 800; }
.grid { display: grid; gap: 10px; }
.grid.two-up { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.field, .toggle-field { display: flex; flex-direction: column; gap: 6px; font-size: 13px; color: var(--muted); }
.field > span:first-child, .toggle-field span { font-weight: 700; color: var(--text); font-size: 13px; }
.field input[type="number"], .field input[type="text"], .field select, .field textarea { width: 100%; border: 1px solid var(--line); border-radius: 12px; padding: 10px 12px; background: #fbfcff; color: var(--text); }
.field textarea { resize: vertical; min-height: 92px; }
.field input[type="range"] { width: 100%; }
.color-field input[type="color"] { width: 100%; height: 42px; border: 1px solid var(--line); border-radius: 12px; background: white; padding: 4px; }
.toggle-field { flex-direction: row; align-items: center; justify-content: flex-start; gap: 10px; padding-top: 22px; }
.toggle-field input { width: 18px; height: 18px; }
.button-row, .layer-actions { display: flex; flex-wrap: wrap; gap: 8px; }
.layers-list { list-style: none; padding: 0; margin: 10px 0; display: flex; flex-direction: column; gap: 8px; max-height: 300px; overflow: auto; }
.layer-item { display: grid; grid-template-columns: 1fr auto auto; align-items: center; gap: 8px; padding: 10px 12px; border-radius: 14px; border: 1px solid var(--line); background: #fbfcff; }
.layer-item button { border: 0; background: none; padding: 0; }
.layer-item.active { border-color: rgba(107,93,255,.4); box-shadow: inset 0 0 0 1px rgba(107,93,255,.25); background: #f6f4ff; }
.layer-item .layer-dot { width: 11px; height: 11px; border-radius: 50%; background: linear-gradient(135deg, var(--accent), var(--accent-2)); }
.layer-item .meta { display: flex; align-items: center; gap: 10px; overflow: hidden; }
.layer-item .title { font-weight: 700; font-size: 14px; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.layer-item .kind { color: var(--muted); font-size: 11px; text-transform: uppercase; letter-spacing: .04em; }
.eye-button { font-size: 16px; color: var(--muted); }
.stage-wrap { min-height: 0; display: flex; flex-direction: column; gap: 10px; }
.stage-toolbar { display: flex; flex-wrap: wrap; gap: 8px; }
.status-inline { background: rgba(255,255,255,0.82); border: 1px solid var(--line); border-radius: 999px; padding: 8px 12px; font-size: 12px; color: var(--muted); box-shadow: var(--shadow); }
.stage-viewport { flex: 1; min-height: 620px; overflow: auto; border-radius: 24px; border: 1px solid var(--line); background:
  linear-gradient(45deg, rgba(122,136,180,0.08) 25%, transparent 25%, transparent 75%, rgba(122,136,180,0.08) 75%),
  linear-gradient(45deg, rgba(122,136,180,0.08) 25%, transparent 25%, transparent 75%, rgba(122,136,180,0.08) 75%),
  #f4f7fc;
  background-size: 24px 24px; background-position: 0 0, 12px 12px; box-shadow: var(--shadow); display: flex; align-items: flex-start; justify-content: flex-start; padding: 26px; }
#stageSvg { background: white; border-radius: 18px; box-shadow: 0 16px 40px rgba(21,38,82,.18); overflow: visible; }
.status-box, .empty-state, .hint { border: 1px dashed var(--line-strong); border-radius: 14px; padding: 10px 12px; color: var(--muted); background: #fbfcff; font-size: 13px; }
.draw-panel { border-style: dashed; }
.hidden { display: none !important; }
.controls-group { display: flex; flex-direction: column; gap: 10px; }
.help-list { margin: 0; padding-left: 18px; color: var(--muted); display: flex; flex-direction: column; gap: 10px; font-size: 14px; }
.handle { fill: white; stroke: #2c3658; stroke-width: 2; cursor: nwse-resize; }
.vertex-handle { fill: #ffb703; stroke: white; stroke-width: 2; cursor: move; }
.selection-outline { fill: none; stroke: #3523cc; stroke-dasharray: 10 8; stroke-width: 2.5; }
.temp-outline { fill: rgba(107,93,255,.08); stroke: rgba(107,93,255,.8); stroke-width: 2.5; stroke-dasharray: 7 7; }
.draw-point { fill: #6b5dff; stroke: white; stroke-width: 2; }
.overlay-hit { fill: rgba(255,255,255,0.001); cursor: move; }
.footer-note { font-size: 12px; color: var(--muted); }
@media (max-width: 1400px) {
  .workspace { grid-template-columns: 300px 1fr 330px; }
}
@media (max-width: 1180px) {
  .workspace { grid-template-columns: 1fr; }
  .sidebar.right, .sidebar.left { order: 2; }
  .stage-wrap { order: 1; }
  .stage-viewport { min-height: 520px; }
}
.toolbar-select {
  min-width: 148px;
  padding: 10px 12px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: #fff;
  color: var(--text);
  font-weight: 700;
}
#manualEdgeRow { display: block; }

/* v5: fixed workspace and compact tabbed inspector */
html, body { height: 100%; overflow: hidden; }
.app-shell { height: 100vh; min-height: 0; overflow: hidden; }
.topbar { flex: 0 0 auto; padding: 8px 12px; gap: 10px; }
.brand-gem { width: 38px; height: 38px; }
.eyebrow { font-size: 9px; }
.topbar h1 { font-size: 21px; }
.toolbar { gap: 5px; }
.primary-button, .secondary-button { padding: 7px 9px; border-radius: 9px; font-size: 12px; }
.icon-button { width: 32px; height: 32px; border-radius: 9px; font-size: 17px; }
.toolbar-select { min-width: 126px; padding: 7px 8px; border-radius: 9px; font-size: 12px; }

.workspace {
  flex: 1 1 auto;
  min-height: 0;
  height: 0;
  overflow: hidden;
  grid-template-columns: 250px minmax(420px, 1fr) 310px;
  gap: 10px;
  padding: 10px;
}
.sidebar { min-height: 0; overflow-y: auto; overscroll-behavior: contain; gap: 9px; padding-right: 2px; }
.stage-wrap { min-width: 0; min-height: 0; overflow: hidden; gap: 7px; }
.stage-toolbar { flex: 0 0 auto; gap: 5px; white-space: nowrap; overflow-x: auto; padding-bottom: 1px; }
.status-inline { padding: 5px 9px; font-size: 10px; box-shadow: none; }
.stage-viewport {
  flex: 1 1 auto;
  min-height: 0;
  height: 100%;
  overflow: auto;
  padding: 16px;
  border-radius: 17px;
  overscroll-behavior: contain;
}
#stageSvg { flex: 0 0 auto; border-radius: 12px; }

.panel { border-radius: 14px; padding: 10px; box-shadow: 0 7px 18px rgba(39, 58, 102, 0.08); }
.panel-head { flex-direction: row; align-items: center; justify-content: space-between; gap: 7px; margin-bottom: 7px; }
.panel-head h2 { font-size: 14px; }
.panel-chip { padding: 3px 6px; font-size: 8px; }
.grid { gap: 6px; }
.field, .toggle-field { gap: 3px; font-size: 11px; }
.field > span:first-child, .toggle-field span { font-size: 10px; }
.field input[type="number"], .field input[type="text"], .field select, .field textarea { padding: 6px 7px; border-radius: 8px; font-size: 11px; min-height: 29px; }
.field textarea { min-height: 76px; }
.field input[type="range"] { margin: 0; height: 16px; }
.color-field input[type="color"] { height: 29px; border-radius: 8px; padding: 2px; }
.toggle-field { padding-top: 15px; gap: 6px; }
.toggle-field input { width: 15px; height: 15px; }
.button-row, .layer-actions { gap: 5px; }
.secondary-button.compact { padding: 6px 7px; font-size: 10px; }
.layers-list { margin: 6px 0; gap: 4px; max-height: min(36vh, 320px); }
.layer-item { padding: 6px 7px; border-radius: 9px; gap: 5px; }
.layer-item .layer-dot { width: 8px; height: 8px; }
.layer-item .meta { gap: 6px; }
.layer-item .title { font-size: 11px; }
.layer-item .kind { font-size: 8px; }
.eye-button { font-size: 13px; }
.status-box, .empty-state, .hint { padding: 7px 8px; border-radius: 9px; font-size: 10px; }
.controls-group { gap: 6px; }
.help-list { gap: 6px; font-size: 11px; padding-left: 15px; }

.tabbed-sidebar { overflow-y: auto; padding-right: 0; background: rgba(255,255,255,.42); border: 1px solid var(--line); border-radius: 15px; }
.tabs-strip {
  flex: 0 0 auto;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 3px;
  padding: 5px;
  background: rgba(239,243,252,.96);
  border-bottom: 1px solid var(--line);
  position: sticky;
  top: 0;
  z-index: 5;
}
.sidebar-tab {
  border: 0;
  border-radius: 8px;
  background: transparent;
  color: var(--muted);
  padding: 7px 3px;
  font-size: 10px;
  font-weight: 800;
}
.sidebar-tab:hover { background: rgba(107,93,255,.08); color: var(--accent); }
.sidebar-tab.is-active { background: #fff; color: var(--accent); box-shadow: 0 2px 7px rgba(42,48,88,.12); }
.tabbed-sidebar > .tab-panel { margin: 7px; }
.tabbed-sidebar > .tab-panel + .tab-panel:not(.is-tab-hidden) { margin-top: 0; }
.is-tab-hidden { display: none !important; }

@media (max-width: 1400px) {
  .workspace { grid-template-columns: 230px minmax(390px, 1fr) 292px; }
}
@media (max-width: 1180px) {
  html, body { overflow: auto; }
  .app-shell { height: auto; min-height: 100vh; overflow: visible; }
  .workspace { height: auto; overflow: visible; grid-template-columns: 1fr; }
  .sidebar { overflow: visible; }
  .tabbed-sidebar { overflow: visible; }
  .stage-viewport { min-height: 520px; }
}

/* Unified edge-aware photo editor */
.tabs-strip { grid-template-columns: repeat(5, 1fr); }
.photo-editor-panel { padding-bottom: 14px; }
.photo-status-row { display: grid; grid-template-columns: minmax(0, 1fr) auto; gap: 6px; align-items: stretch; }
.photo-status-row .status-box { display: flex; align-items: center; min-height: 31px; }
.status-box.is-busy::before { content: ""; width: 10px; height: 10px; margin-right: 7px; border: 2px solid rgba(107,93,255,.25); border-top-color: var(--accent); border-radius: 50%; animation: photo-spin .8s linear infinite; }
.photo-mode-row { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); }
.photo-mode-row > button { min-width: 0; }
.full-width { width: 100%; }
.control-section { border: 1px solid var(--line); border-radius: 11px; background: #fbfcff; overflow: hidden; }
.control-section > summary { cursor: pointer; list-style: none; padding: 8px 9px; color: var(--text); font-size: 10px; font-weight: 850; background: #f4f6fc; border-bottom: 1px solid transparent; }
.control-section[open] > summary { border-bottom-color: var(--line); }
.control-section > summary::-webkit-details-marker { display: none; }
.control-section > summary::after { content: "+"; float: right; color: var(--accent); }
.control-section[open] > summary::after { content: "−"; }
.control-section > :not(summary) { margin-left: 8px; margin-right: 8px; }
.control-section > :last-child { margin-bottom: 8px; }
.photo-triangle-selection { fill: rgba(255, 201, 74, .18); stroke: #ffc94a; stroke-width: 1.8; pointer-events: none; }
.photo-lasso-line { fill: none; stroke: #5367e8; stroke-width: 2.2; stroke-dasharray: 9 7; pointer-events: none; }
.photo-lasso-fill { fill: rgba(83, 103, 232, .10); stroke: none; pointer-events: none; }
.photo-guide-line { fill: none; stroke: #665cf0; stroke-width: 2.4; stroke-linecap: round; stroke-linejoin: round; pointer-events: none; }
.photo-guide-line.is-active { stroke: #ffc94a; }
.photo-mesh-handle { fill: white; stroke: #404b83; stroke-width: 1.6; cursor: move; }
.photo-wireframe { fill: none; stroke: rgba(40,48,92,.32); stroke-width: .8; pointer-events: none; }
[data-photo-triangle] { pointer-events: all; }
@keyframes photo-spin { to { transform: rotate(360deg); } }

.facet-mode-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 7px;
}
.facet-mode-grid .compact { width: 100%; min-width: 0; }
#shapeMeshSection .button-row > button { flex: 1; }
.photo-mesh-handle[data-shape-vertex] { fill: #fffdf7; }
.photo-mesh-handle[data-shape-vertex]:hover { fill: #ffc94a; }