:root {
      --bg: #F2F5F8;
      --panel: #FFFFFF;
      --panel2: #F6F8FA;
      --border: #DDE3EA;
      --border2: #B8C4CE;
      --accent: #3293D4;
      --accent-l: #E6F3FB;
      --text: #1A1A1A;
      --muted: #5A6472;
      --muted2: #9AA3AD;
      --green: #1A7A45;
      --blue: #3293D4;
      --dim-color: #3293D4;
      --sel-color: #F59E0B;
      --hover-color: #FCD34D;
      --shadow: 0 1px 3px rgba(0, 0, 0, .08), 0 4px 12px rgba(0, 0, 0, .05);
    }

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

    html,
    body {
      height: 100%;
      overflow: hidden;
      font-family: 'Roboto', sans-serif;
      background: var(--bg);
      color: var(--text);
      font-size: 13px
    }

    /* ── MAIN LAYOUT ── */
    .app-wrap {
      display: flex;
      flex-direction: column;
      height: 100vh;
      position: relative;
    }

    .view-btn {
      padding: 4px 10px;
      border-radius: 5px;
      border: 1.5px solid var(--border);
      background: transparent;
      font-size: 10px;
      font-weight: 700;
      color: var(--muted);
      cursor: pointer;
      transition: all .15s;
      font-family: 'Roboto', sans-serif;
      letter-spacing: .5px;
      text-transform: uppercase
    }

    .view-btn.active {
      background: var(--accent);
      color: #fff;
      border-color: var(--accent)
    }

    .view-btn:hover:not(.active) {
      border-color: var(--accent);
      color: var(--accent)
    }

    .workspace {
      display: flex;
      flex: 1;
      overflow: hidden;
      min-height: 0
    }

    /* ── PANELS ── */
    .side-panel {
      width: 320px;
      flex-shrink: 0;
      background: var(--panel);
      border-right: 1px solid var(--border);
      display: flex;
      flex-direction: column;
      overflow: hidden
    }

    .right-panel {
      border-right: none;
      border-left: 1px solid var(--border)
    }

    .panel-head {
      padding: 12px 14px 0;
      border-bottom: 1px solid var(--border);
      flex-shrink: 0
    }

    .panel-head-title {
      font-family: 'Montserrat', sans-serif;
      font-size: 14px;
      font-weight: 700;
      color: var(--text);
      margin-bottom: 10px
    }

    .panel-scroll {
      overflow-y: auto;
      overflow-x: hidden;
      flex: 1;
      padding: 12px 14px;
      padding-bottom: 500px;
      min-height: 0;
    }

    /* Panel sections */
    .ps-block {
      margin-bottom: 14px
    }

    .ps-label {
      font-size: 9px;
      letter-spacing: 1.5px;
      text-transform: uppercase;
      color: var(--muted2);
      font-weight: 700;
      margin-bottom: 7px;
      display: flex;
      align-items: center;
      gap: 6px
    }

    .ps-label::after {
      content: '';
      flex: 1;
      height: 1px;
      background: var(--border)
    }

    .field label {
      display: block;
      font-size: 10px;
      color: var(--muted);
      margin-bottom: 3px;
      font-weight: 500
    }

    .field {
      margin-bottom: 7px
    }

    .field input,
    .field select {
      width: 100%;
      background: var(--panel2);
      border: 1.5px solid var(--border);
      border-radius: 7px;
      padding: 6px 10px;
      color: var(--text);
      font-size: 12px;
      font-family: 'Roboto', sans-serif;
      outline: none;
      transition: border-color .15s
    }

    .field input:focus,
    .field select:focus {
      border-color: var(--accent)
    }

    .grid2 {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 7px
    }

    .grid3 {
      display: grid;
      grid-template-columns: 1fr 1fr 1fr;
      gap: 6px
    }

    /* Layer checkboxes */
    .layer-item {
      display: flex;
      align-items: center;
      gap: 8px;
      padding: 6px 8px;
      border-radius: 7px;
      cursor: pointer;
      transition: background .1s;
      margin-bottom: 3px
    }

    .layer-item:hover {
      background: var(--panel2)
    }

    .layer-item input[type=checkbox] {
      accent-color: var(--accent);
      width: 14px;
      height: 14px;
      cursor: pointer;
      flex-shrink: 0
    }

    .layer-dot {
      width: 9px;
      height: 9px;
      border-radius: 50%;
      flex-shrink: 0
    }

    .layer-name {
      font-size: 12px;
      font-weight: 500;
      flex: 1
    }

    /* Floor tabs */
    .floor-tabs {
      display: flex;
      align-items: flex-start;
      gap: 0;
      flex-wrap: wrap;
      margin-bottom: 0;
      flex-direction: column
    }

    .floor-tab {
      padding: 4px 10px;
      border-radius: 5px;
      border: 1.5px solid var(--border);
      font-size: 11px;
      font-weight: 600;
      cursor: pointer;
      color: var(--muted);
      background: transparent;
      transition: all .15s;
      font-family: 'Roboto', sans-serif
    }

    .floor-tab.active {
      background: var(--accent);
      color: #fff;
      border-color: var(--accent)
    }

    .floor-tab-add {
      background: transparent;
      border: 1.5px dashed var(--border2);
      color: var(--muted);
      padding: 4px 9px;
      border-radius: 5px;
      cursor: pointer;
      font-size: 14px;
      transition: all .15s;
      line-height: 1
    }

    .floor-tab-add:hover {
      border-color: var(--accent);
      color: var(--accent)
    }

    /* Properties panel - no selection */
    .no-sel {
      text-align: center;
      padding: 40px 20px;
      color: var(--muted2)
    }

    .no-sel .ns-icon {
      font-size: 32px;
      margin-bottom: 8px
    }

    .no-sel .ns-text {
      font-size: 11px;
      line-height: 1.5
    }

    /* Color swatch */
    .mat-swatch {
      width: 100%;
      height: 30px;
      border-radius: 7px;
      border: 2px solid var(--border);
      cursor: pointer;
      transition: border-color .15s
    }

    .mat-swatch:hover {
      border-color: var(--accent)
    }

    /* ── CENTER AREA ── */
    .center-area {
      flex: 1;
      display: flex;
      flex-direction: column;
      overflow: hidden;
      min-width: 0
    }

    /* Action toolbar */
    .action-toolbar {
      height: 52px;
      background: var(--panel);
      border-bottom: 1px solid var(--border);
      display: flex;
      align-items: center;
      justify-content: center;
      padding: 0 10px;
      gap: 3px;
      flex-shrink: 0;
      box-shadow: 0 1px 0 var(--border), 0 2px 6px rgba(0, 0, 0, .04);
    }

    .tb-group {
      display: flex;
      align-items: center;
      gap: 1px;
      background: var(--panel2);
      border: 1px solid var(--border);
      border-radius: 9px;
      padding: 3px;
    }

    .tool-btn {
      width: 38px;
      height: 38px;
      border-radius: 7px;
      border: none;
      background: transparent;
      cursor: pointer;
      font-size: 19px;
      display: flex;
      align-items: center;
      justify-content: center;
      transition: all .13s;
      position: relative;
      font-family: 'Roboto', sans-serif;
      color: var(--text);
    }

    .tool-btn:hover:not(.active) {
      background: rgba(0, 0, 0, .06)
    }

    .tool-btn.active {
      background: var(--accent-l);
      border: 1.5px solid var(--accent);
    }

    /* Icon images inside buttons — remove black background */
    .tool-btn img {
      width: 26px;
      height: 26px;
      object-fit: contain;
      mix-blend-mode: multiply;
      /* black bg disappears on white */
      transition: filter .13s;
      pointer-events: none;
    }

    .tool-btn:hover img {
      filter: none;
      /* no purple tint, just normal */
    }

    .tool-btn.active img {
      mix-blend-mode: multiply;
    }

    .tool-btn[data-tip]:hover::after {
      content: attr(data-tip);
      position: absolute;
      top: calc(100% + 8px);
      left: 50%;
      transform: translateX(-50%);
      background: rgba(28, 25, 23, .92);
      color: #fff;
      font-size: 10px;
      font-weight: 500;
      padding: 3px 9px;
      border-radius: 5px;
      white-space: nowrap;
      pointer-events: none;
      z-index: 9999;
      font-family: 'Roboto', sans-serif;
    }

    .tool-btn[data-tip]:hover::before {
      content: '';
      position: absolute;
      top: calc(100% + 3px);
      left: 50%;
      transform: translateX(-50%);
      border: 4px solid transparent;
      border-bottom-color: rgba(28, 25, 23, .92);
      pointer-events: none;
      z-index: 9999;
    }

    .tb-key {
      position: absolute;
      bottom: 2px;
      right: 3px;
      font-size: 7px;
      font-weight: 700;
      color: var(--muted2);
      font-family: 'Roboto', sans-serif;
    }

    .tool-btn.active .tb-key {
      color: rgba(255, 255, 255, .55)
    }

    .tb-sep {
      width: 1px;
      height: 28px;
      background: var(--border);
      margin: 0 3px;
      flex-shrink: 0
    }

    .view-btn {
      padding: 4px 10px;
      border-radius: 6px;
      border: 1.5px solid var(--border);
      background: transparent;
      font-size: 10px;
      font-weight: 700;
      color: var(--muted);
      cursor: pointer;
      transition: all .15s;
      font-family: 'Roboto', sans-serif;
      letter-spacing: .5px;
      text-transform: uppercase
    }

    .view-btn.active {
      background: var(--accent);
      color: #fff;
      border-color: var(--accent);
      box-shadow: 0 2px 8px rgba(50, 147, 212, .25)
    }

    .view-btn:hover:not(.active) {
      border-color: var(--accent);
      color: var(--accent)
    }

    /* Canvas area */
    .canvas-area {
      flex: 1;
      display: flex;
      position: relative;
      overflow: hidden;
      min-height: 0
    }

    .canvas-half {
      flex: 1;
      position: relative;
      overflow: hidden
    }

    .canvas-divider {
      width: 3px;
      background: var(--border);
      cursor: col-resize;
      flex-shrink: 0;
      position: relative;
      z-index: 10
    }

    .canvas-divider:hover {
      background: var(--accent)
    }

    #canvas2d {
      position: absolute;
      inset: 0;
      cursor: crosshair
    }

    #canvas3d {
      position: absolute;
      inset: 0;
      display: block
    }

    .canvas-label {
      position: absolute;
      top: 8px;
      left: 50%;
      transform: translateX(-50%);
      background: rgba(255, 255, 255, .9);
      border: 1px solid var(--border);
      border-radius: 5px;
      padding: 3px 10px;
      font-size: 10px;
      font-weight: 600;
      color: var(--muted);
      pointer-events: none;
      letter-spacing: .5px;
      text-transform: uppercase;
      backdrop-filter: blur(4px);
    }

    .canvas-2d-controls {
      position: absolute;
      top: 10px;
      left: 50%;
      transform: translateX(-50%);
      background: rgba(255, 255, 255, .92);
      border: 1px solid var(--border);
      border-radius: 8px;
      padding: 3px 10px;
      display: flex;
      gap: 6px;
      align-items: center;
      backdrop-filter: blur(6px);
      box-shadow: 0 2px 8px rgba(0,0,0,.08);
      pointer-events: all;
      z-index: 15;
    }

    .c2d-btn {
      padding: 3px 8px;
      border-radius: 5px;
      border: 1px solid var(--border);
      background: var(--panel);
      font-size: 10px;
      color: var(--muted);
      cursor: pointer;
      font-family: 'Roboto', sans-serif;
      transition: all .12s
    }

    .c2d-btn:hover {
      border-color: var(--accent);
      color: var(--accent)
    }

    .zoom-val {
      font-size: 10px;
      color: var(--muted);
      min-width: 32px;
      text-align: center;
      font-weight: 600
    }

    /* 3D controls overlay */
    .vp3d-label {
      position: absolute;
      bottom: 10px;
      left: 50%;
      transform: translateX(-50%);
      background: rgba(255, 255, 255, .88);
      border: 1px solid var(--border);
      border-radius: 7px;
      padding: 4px 12px;
      font-size: 9px;
      color: var(--muted);
      display: flex;
      gap: 12px;
      pointer-events: none;
      backdrop-filter: blur(4px);
    }

    /* ViewCube panel — 6 views + parallel toggle */
    .viewcube-wrap {
      position: absolute;
      top: 10px;
      right: 10px;
      z-index: 15;
      background: rgba(255, 255, 255, .94);
      border: 1px solid var(--border);
      border-radius: 10px;
      padding: 8px;
      box-shadow: 0 2px 12px rgba(0, 0, 0, .1);
      backdrop-filter: blur(6px);
      user-select: none;
      width: 168px;
    }

    .vc-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 4px;
    }

    .vc-view-btn {
      padding: 6px 8px;
      border-radius: 6px;
      border: 1.5px solid var(--border);
      background: var(--panel2);
      color: var(--muted);
      font-size: 11px;
      font-weight: 600;
      font-family: 'Roboto', sans-serif;
      cursor: pointer;
      transition: all .12s;
      text-align: center;
    }

    .vc-view-btn:hover:not(.active) {
      border-color: var(--accent);
      color: var(--accent);
    }

    .vc-view-btn.active {
      background: var(--accent);
      color: #fff;
      border-color: var(--accent);
    }

    .vc-ortho {
      display: flex;
      align-items: center;
      gap: 6px;
      margin-top: 8px;
      padding: 5px 6px;
      border-top: 1px solid var(--border);
      cursor: pointer;
      font-size: 11px;
      font-weight: 600;
      color: var(--text);
    }

    .vc-ortho input[type=checkbox] {
      width: 14px;
      height: 14px;
      accent-color: var(--accent);
      cursor: pointer;
      flex-shrink: 0;
    }

    /* ── BOTTOM BAR — absolute overlay so canvas fills full viewport height ── */
    .bottom-bar {
      position: absolute;
      bottom: 0;
      left: 0;
      right: 0;
      z-index: 50;
      height: 210px;
      background: var(--panel);
      border-top: 1px solid var(--border);
      display: flex;
      flex-direction: column;
      overflow: hidden;
      transition: height .35s cubic-bezier(.4,0,.2,1);
      box-shadow: 0 -2px 12px rgba(0,0,0,.08);
    }

    .bottom-bar.collapsed {
      height: 36px
    }

    .bb-curtain {
      position: absolute;
      left: 0;
      right: 0;
      top: -6px;
      height: 12px;
      cursor: ns-resize;
      z-index: 40;
    }

    .bb-curtain:before {
      content: "";
      position: absolute;
      left: 0;
      right: 0;
      top: 5px;
      height: 2px;
      background: linear-gradient(90deg, transparent, rgba(0, 0, 0, .12), transparent);
    }

    .bb-head {
      height: 28px;
      flex-shrink: 0;
      display: flex;
      align-items: center;
      justify-content: center;
      padding: 0 16px;
      border-bottom: 1px solid var(--border);
      cursor: ns-resize;
      user-select: none;
      position: relative;
    }

    .bb-drag-handle {
      width: 40px;
      height: 4px;
      border-radius: 2px;
      background: #d0d5dd;
      transition: background .15s;
    }

    .bb-head:hover .bb-drag-handle {
      background: #3293D4;
    }

    .bb-close-btn {
      position: absolute;
      right: 12px;
      top: 50%;
      transform: translateY(-50%);
      background: none;
      border: none;
      color: var(--muted2);
      font-size: 12px;
      cursor: pointer;
      padding: 2px 4px;
      border-radius: 4px;
      line-height: 1;
      transition: color .15s, background .15s;
    }

    .bb-close-btn:hover {
      color: #DC2626;
      background: rgba(220,38,38,.08);
    }

    .bb-body {
      flex: 1;
      display: flex;
      overflow-x: auto;
      overflow-y: hidden;
      padding: 8px 10px;
      gap: 7px;
      align-items: stretch;
    }

    .bb-card {
      background: var(--panel2);
      border: 1px solid var(--border);
      border-radius: 12px;
      padding: 8px 11px;
      min-width: 160px;
      flex: 1;
      display: flex;
      flex-direction: column;
      overflow: hidden;
    }

    .bb-card-title {
      font-size: 9px;
      letter-spacing: 1.4px;
      text-transform: uppercase;
      color: var(--muted2);
      font-weight: 700;
      font-family: 'Montserrat', sans-serif;
      margin-bottom: 5px;
      flex-shrink: 0;
    }

    .bb-card-content {
      flex: 1;
      overflow-y: auto;
    }

    .bb-row {
      display: flex;
      justify-content: space-between;
      padding: 2px 0;
      border-bottom: 1px solid var(--border);
      font-size: 11px;
      gap: 4px;
    }

    .bb-row:last-child {
      border-bottom: none;
      padding-top: 3px;
    }

    .bb-row .bl {
      color: var(--muted);
      flex: 1;
    }

    .bb-row .bv {
      font-weight: 600;
      color: var(--text);
      white-space: nowrap;
    }

    .bb-row .bv.price {
      color: #3293D4;
      font-weight: 700;
    }

    .bb-card-total {
      background: #fff;
      border: 1px solid var(--border);
    }

    .bb-card-total .bb-card-title {
      color: var(--muted2);
    }

    .bb-card-total .bb-row {
      border-bottom-color: var(--border);
    }

    .bb-card-total .bb-row .bl {
      color: var(--muted);
    }

    .bb-card-total .bb-row .bv {
      color: var(--text);
    }

    /* Кнопка ручного пересчёта сметы в карточке «Итого — материалы».
       База — полупрозрачная; после успешного расчёта получает .calculated (синяя). */
    .bb-recalc-btn {
      width: 100%;
      padding: 6px 8px;
      margin-top: 6px;
      border: none;
      border-radius: 6px;
      background: rgba(99, 102, 241, .65);
      color: #fff;
      font-family: 'Montserrat', sans-serif;
      font-size: 11px;
      font-weight: 700;
      letter-spacing: .5px;
      cursor: pointer;
      transition: background .15s, filter .15s;
      flex-shrink: 0;
    }
    .bb-recalc-btn:hover { filter: brightness(1.08); }
    .bb-recalc-btn:disabled { opacity: .6; cursor: default; }
    .bb-recalc-btn.calculated { background: rgb(99, 102, 241); }

    .bb-card-prices {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 3px 6px;
      padding-bottom: 6px;
      margin-bottom: 5px;
      border-bottom: 1px solid var(--border);
      flex-shrink: 0;
    }

    .bb-card-prices-note {
      display: block;
      font-size: 9px;
      color: var(--muted);
      padding-bottom: 6px;
      margin-bottom: 5px;
      border-bottom: 1px solid var(--border);
      line-height: 1.4;
    }

    .bb-pf {
      position: relative;
    }

    .bb-pf label {
      font-size: 9px;
      color: var(--muted);
      display: block;
      margin-bottom: 1px;
      font-weight: 500;
      white-space: nowrap;
      overflow: hidden;
      text-overflow: ellipsis;
    }

    .bb-pf input {
      width: 100%;
      background: #ffffff;
      border: 1px solid var(--border);
      border-radius: 5px;
      padding: 3px 20px 3px 5px;
      font-size: 10px;
      font-family: 'Roboto', sans-serif;
      color: var(--text);
      outline: none;
      box-sizing: border-box;
    }

    .bb-pf::after {
      content: '₸';
      position: absolute;
      right: 6px;
      bottom: 4px;
      font-size: 9px;
      font-weight: 600;
      color: var(--muted);
      pointer-events: none;
      line-height: 1;
    }

    .bb-pf input:focus { border-color: var(--accent); }
    .bb-pf-no-cur::after { content: none; }

    #bb-total-prices {
      display: flex;
      flex-direction: column;
      border-bottom: none;
      padding-bottom: 4px;
      margin-bottom: 0;
    }

    .bb-grand-val {
      font-family: 'Montserrat', sans-serif;
      font-size: 21px;
      font-weight: 700;
      color: var(--text);
      line-height: 1.15;
      margin: 3px 0 2px;
    }

    .bb-grand-sub {
      font-size: 10px;
      color: var(--muted);
      margin-bottom: 6px;
    }

    .bb-bar-wrap {
      display: flex;
      align-items: center;
      gap: 5px;
      margin-bottom: 3px;
    }

    .bb-bar-lbl {
      font-size: 9px;
      color: var(--muted);
      min-width: 60px;
    }

    .bb-bar-track {
      flex: 1;
      height: 4px;
      background: var(--border);
      border-radius: 2px;
      overflow: hidden;
    }

    .bb-bar-fill {
      height: 100%;
      border-radius: 2px;
      background: #3293D4;
    }

    .bb-bar-pct {
      font-size: 9px;
      color: var(--muted2);
      min-width: 26px;
      text-align: right;
    }

    /* Scrollbars */
    ::-webkit-scrollbar {
      width: 5px;
      height: 5px
    }

    ::-webkit-scrollbar-track {
      background: transparent
    }

    ::-webkit-scrollbar-thumb {
      background: var(--border2);
      border-radius: 3px
    }

    /* Canvas view switcher — top-left of 2D canvas */
    .canvas-view-switcher {
      position: absolute;
      top: 10px;
      left: 10px;
      z-index: 15;
      display: flex;
      gap: 2px;
      background: rgba(255, 255, 255, .92);
      border: 1px solid var(--border);
      border-radius: 8px;
      padding: 3px;
      backdrop-filter: blur(6px);
      box-shadow: 0 2px 8px rgba(0, 0, 0, .08);
      pointer-events: all;
    }

    .cvs-btn {
      padding: 4px 12px;
      border-radius: 5px;
      border: none;
      background: transparent;
      font-size: 11px;
      font-weight: 700;
      color: var(--muted);
      cursor: pointer;
      transition: all .15s;
      font-family: 'Roboto', sans-serif;
      letter-spacing: .3px;
    }

    .cvs-btn.active {
      background: var(--accent);
      color: #fff;
      box-shadow: 0 1px 4px rgba(50, 147, 212, .25)
    }

    .cvs-btn:hover:not(.active) {
      background: var(--panel2);
      color: var(--text)
    }

    /* Hotkey toast */
    #hkToast {
      position: absolute;
      bottom: 52px;
      left: 50%;
      transform: translateX(-50%);
      background: rgba(28, 25, 23, .85);
      color: #fff;
      padding: 4px 14px;
      border-radius: 6px;
      font-size: 11px;
      pointer-events: none;
      z-index: 20
    }

    /* Section indicator */
    .section-indicator {
      position: absolute;
      pointer-events: none;
      z-index: 8;
      background: rgba(99, 102, 241, .65);
      box-shadow: 0 0 8px rgba(99, 102, 241, .4)
    }

    .section-indicator.h {
      left: 0;
      right: 0;
      height: 2px
    }

    .section-indicator.v {
      top: 0;
      bottom: 0;
      width: 2px
    }

    /* 3D selected highlight */
    .sel3d-badge {
      position: absolute;
      top: 8px;
      left: 8px;
      background: rgba(255, 255, 255, .92);
      border: 1px solid var(--border);
      border-radius: 6px;
      padding: 4px 10px;
      font-size: 10px;
      color: var(--blue);
      font-weight: 600;
      pointer-events: none;
      backdrop-filter: blur(4px)
    }

    /* Bottom bar layer filters */
    .bb-layers {
      display: flex;
      align-items: center;
      gap: 6px;
      flex-wrap: wrap;
      padding: 0 6px
    }

    .bb-layer-chk {
      display: flex;
      align-items: center;
      gap: 4px;
      padding: 3px 8px;
      border-radius: 5px;
      border: 1.5px solid var(--border);
      background: var(--panel2);
      cursor: pointer;
      font-size: 10px;
      font-weight: 600;
      color: var(--muted);
      transition: all .15s;
      white-space: nowrap;
      user-select: none
    }

    .bb-layer-chk.active {
      border-color: currentColor
    }

    .bb-layer-chk .bl-dot {
      width: 7px;
      height: 7px;
      border-radius: 50%;
      flex-shrink: 0
    }

    .bb-layer-chk input {
      display: none
    }

    /* Furniture panel */
    .furn-panel {
      padding: 10px 12px;
      overflow-y: auto
    }

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

    .furn-item {
      display: flex;
      flex-direction: column;
      align-items: center;
      gap: 5px;
      padding: 10px 6px 8px;
      border-radius: 8px;
      border: 1.5px solid var(--border);
      background: var(--panel2);
      cursor: pointer;
      transition: all .13s;
      font-size: 10px;
      font-weight: 600;
      color: var(--muted);
      text-align: center;
    }

    .furn-item:hover {
      border-color: var(--accent);
      color: var(--accent);
      background: var(--accent-l)
    }

    .furn-item.selected {
      border-color: var(--accent);
      background: var(--accent-l);
      color: var(--accent)
    }

    .furn-icon {
      font-size: 26px;
      line-height: 1
    }

    .furn-preview {
      width: 56px;
      height: 42px;
      flex-shrink: 0
    }

    .furn-color-row {
      display: flex;
      gap: 5px;
      align-items: center;
      flex-wrap: wrap;
      margin-top: 4px
    }

    .furn-color-swatch {
      width: 20px;
      height: 20px;
      border-radius: 4px;
      border: 2px solid var(--border);
      cursor: pointer;
      transition: border-color .1s
    }

    .furn-color-swatch:hover,
    .furn-color-swatch.sel {
      border-color: var(--accent)
    }

    .furn-rot-btn {
      background: var(--panel2);
      border: 1px solid var(--border);
      border-radius: 5px;
      padding: 3px 8px;
      font-size: 11px;
      cursor: pointer;
      font-family: 'Roboto', sans-serif;
      color: var(--muted);
      transition: all .1s
    }

    .furn-rot-btn:hover {
      border-color: var(--accent);
      color: var(--accent)
    }

    .furn-placed-list {
      margin-top: 8px
    }

    .furn-placed-item {
      display: flex;
      align-items: center;
      gap: 6px;
      padding: 4px 6px;
      border-radius: 5px;
      font-size: 11px;
      color: var(--muted);
      cursor: pointer;
      transition: background .1s
    }

    .furn-placed-item:hover {
      background: var(--panel2)
    }

    .furn-placed-item.sel {
      background: var(--accent-l);
      color: var(--accent);
      font-weight: 500
    }

    /* ── ACCORDION ── */
    .acc-item {
      border: 1px solid var(--border);
      border-radius: 10px;
      margin-bottom: 6px;
      overflow: hidden;
      transition: box-shadow .13s, opacity .2s;
    }

    .acc-item:hover { box-shadow: 0 2px 8px rgba(0,0,0,.07); }

    .acc-item.smeta-off { opacity: .52; }

    .acc-head {
      display: flex;
      align-items: center;
      gap: 0;
      padding: 0;
      background: var(--panel2);
      user-select: none;
      transition: background .13s;
    }

    .acc-head:hover { background: #EDF2F7; }
    .acc-head.open { background: #E8F3FB; border-bottom: 1px solid var(--border); }

    /* Toggle zone (left) */
    .acc-sw-wrap {
      padding: 11px 10px 11px 12px;
      flex-shrink: 0;
      cursor: pointer;
      display: flex;
      align-items: center;
    }

    .acc-sw {
      width: 30px;
      height: 17px;
      border-radius: 9px;
      background: var(--border2);
      position: relative;
      flex-shrink: 0;
      transition: background .2s;
      pointer-events: none;
    }

    .acc-sw.on { background: var(--accent); }

    .acc-sw::after {
      content: '';
      position: absolute;
      top: 2px; left: 2px;
      width: 13px; height: 13px;
      border-radius: 50%;
      background: #fff;
      transition: left .2s;
      box-shadow: 0 1px 3px rgba(0,0,0,.2);
    }

    .acc-sw.on::after { left: 15px; }

    /* Expand zone (center+right) */
    .acc-expand-wrap {
      flex: 1;
      display: flex;
      align-items: center;
      justify-content: space-between;
      padding: 11px 12px 11px 8px;
      cursor: pointer;
      min-width: 0;
    }

    .acc-head-text { min-width: 0; }

    .acc-head-name {
      font-size: 12px;
      font-weight: 600;
      color: var(--text);
      line-height: 1.2;
    }

    .acc-head.open .acc-head-name { color: var(--accent); }

    .acc-head-desc {
      font-size: 10px;
      color: var(--muted);
      margin-top: 1px;
    }

    .acc-arrow {
      font-size: 9px;
      color: var(--muted2);
      transition: transform .2s;
      flex-shrink: 0;
      margin-left: 8px;
    }

    .acc-head.open .acc-arrow { transform: rotate(180deg); color: var(--accent); }

    .acc-body {
      padding: 10px 12px;
      background: #fff;
      display: none;
    }

    .acc-body.open { display: block; }

    .acc-sub-label {
      font-size: 9px;
      letter-spacing: 1.2px;
      text-transform: uppercase;
      color: var(--muted2);
      font-weight: 700;
      margin: 8px 0 5px;
      padding-bottom: 3px;
      border-bottom: 1px solid var(--border);
    }

    .acc-sub-label:first-child { margin-top: 0; }

    .acc-sub-label-cb {
      display: flex;
      align-items: center;
      cursor: pointer;
      user-select: none;
      border-bottom: 1px solid var(--border);
      padding-bottom: 3px;
    }

    .op-grid-hdr {
      display: grid;
      grid-template-columns: 1fr 1fr 1fr;
      gap: 4px;
      text-align: center;
      font-size: 9px;
      color: var(--muted2);
      margin-bottom: 3px;
    }

    .op-row {
      display: grid;
      grid-template-columns: 60px 1fr 1fr 1fr;
      gap: 4px;
      margin-bottom: 4px;
      align-items: center;
    }

    .op-row-lbl {
      font-size: 10px;
      color: var(--muted);
      font-weight: 500;
    }

    .op-row input {
      width: 100%;
      background: var(--panel2);
      border: 1.5px solid var(--border);
      border-radius: 6px;
      padding: 4px 6px;
      color: var(--text);
      font-size: 11px;
      font-family: 'Roboto', sans-serif;
      text-align: center;
      outline: none;
      transition: border-color .15s;
    }

    .op-row input:focus { border-color: var(--accent); }

    .rng-row {
      display: flex;
      align-items: center;
      gap: 8px;
    }

    .rng-row input[type=range] {
      flex: 1;
      accent-color: var(--accent);
    }

    .rng-val {
      font-size: 12px;
      font-weight: 600;
      min-width: 34px;
      color: var(--text);
      text-align: right;
    }

    /* ── 3D FLOOR PANEL ── */
    .floor-3d-panel {
      position: absolute;
      top: 10px;
      right: 10px;
      z-index: 15;
      background: rgba(255,255,255,.94);
      border: 1px solid var(--border);
      border-radius: 10px;
      padding: 8px 10px;
      min-width: 156px;
      max-width: 200px;
      box-shadow: 0 2px 12px rgba(0,0,0,.1);
      backdrop-filter: blur(6px);
    }

    .f3dp-title {
      font-size: 9px;
      letter-spacing: 1.2px;
      text-transform: uppercase;
      color: var(--muted2);
      font-weight: 700;
      margin-bottom: 7px;
    }

    .f3dp-fields {
      display: flex;
      align-items: center;
      gap: 6px;
      margin-top: 6px;
    }

    .f3dp-fields label {
      font-size: 9px;
      color: var(--muted);
      display: block;
      margin-bottom: 2px;
      font-weight: 500;
    }

    .f3dp-fields input {
      width: 100%;
      background: var(--panel2);
      border: 1.5px solid var(--border);
      border-radius: 6px;
      padding: 4px 6px;
      font-size: 11px;
      font-family: 'Roboto', sans-serif;
      color: var(--text);
      outline: none;
    }

    .f3dp-fields input:focus { border-color: var(--accent); }

    .floor-tab-del {
      background: transparent;
      border: none;
      color: var(--muted2);
      cursor: pointer;
      font-size: 13px;
      padding: 0 2px;
      line-height: 1;
    }

    .floor-tab-del:hover { color: #DC2626; }

    /* ── LAYERS PANEL (left sidebar) ── */
    .lp-layers-wrap {
      padding: 12px 14px;
      padding-bottom: 500px;
      overflow-y: auto;
      flex: 1;
      min-height: 0;
    }

    .layer-card {
      display: flex;
      align-items: center;
      justify-content: space-between;
      padding: 9px 12px;
      border: 1px solid var(--border);
      border-radius: 10px;
      margin-bottom: 6px;
      background: var(--panel2);
      cursor: pointer;
      transition: background .12s;
      user-select: none;
    }

    .layer-card:hover { background: #EDF2F7; }

    .layer-card.off {
      opacity: .45;
    }

    .layer-card-left {
      display: flex;
      align-items: center;
      gap: 10px;
    }

    .layer-dot-lg {
      width: 12px;
      height: 12px;
      border-radius: 50%;
      flex-shrink: 0;
    }

    .layer-card-name {
      font-size: 12px;
      font-weight: 600;
      color: var(--text);
    }

    .layer-card-desc {
      font-size: 10px;
      color: var(--muted);
      margin-top: 1px;
    }

    .layer-toggle {
      width: 34px;
      height: 19px;
      border-radius: 10px;
      background: var(--border2);
      position: relative;
      flex-shrink: 0;
      transition: background .2s;
    }

    .layer-toggle.on { background: var(--accent); }

    .layer-toggle::after {
      content: '';
      position: absolute;
      top: 2px;
      left: 2px;
      width: 15px;
      height: 15px;
      border-radius: 50%;
      background: #fff;
      transition: left .2s;
      box-shadow: 0 1px 3px rgba(0,0,0,.2);
    }

    .layer-toggle.on::after { left: 17px; }

    .scale-btn {
  flex: 1;
  padding: 5px 8px;
  border-radius: 6px;
  border: 1.5px solid var(--border);
  background: var(--panel2);
  color: var(--muted);
  font-size: 11px;
  font-weight: 600;
  cursor: pointer;
  transition: all .15s;
  font-family: inherit;
}
.scale-btn.active {
  border-color: var(--accent);
  background: var(--accent-l);
  color: var(--accent);
}