* { margin: 0; padding: 0; box-sizing: border-box; }
  body { background: #0a0a0f; color: #e8e8f0; font-family: 'Courier New', monospace; overflow: hidden; height: 100vh; }
  #canvas-container { position: fixed; inset: 0; }
  canvas { display: block; }

  #top-bar {
    position: fixed; top: 0; left: 0; right: 0; height: 48px;
    background: rgba(10,10,20,0.88); backdrop-filter: blur(10px);
    border-bottom: 1px solid rgba(100,120,255,0.2);
    display: flex; align-items: center; padding: 0 16px; gap: 12px; z-index: 100;
  }
  #logo { font-size: 13px; letter-spacing: 3px; color: #7880ff; font-weight: bold; white-space: nowrap; }
  #scene-tabs { display: flex; gap: 6px; flex: 1; overflow-x: auto; padding: 4px 0; scrollbar-width: none; }
  #scene-tabs::-webkit-scrollbar { display: none; }
  .scene-tab {
    padding: 4px 12px; border-radius: 4px; font-size: 11px; letter-spacing: 1px;
    border: 1px solid rgba(120,128,255,0.3); background: transparent; color: #8890cc;
    cursor: pointer; white-space: nowrap; transition: all 0.2s; text-transform: uppercase;
    display: flex; align-items: center; gap: 6px;
  }
  .scene-tab:hover { border-color: rgba(120,128,255,0.7); color: #b0b8ff; }
  .scene-tab.active { background: rgba(120,128,255,0.15); border-color: #7880ff; color: #c0c8ff; }
  .tab-close { opacity: 0.4; font-size: 10px; line-height: 1; }
  .tab-close:hover { opacity: 1; }
  #add-scene-btn {
    padding: 4px 12px; border-radius: 4px; font-size: 16px; line-height: 1;
    border: 1px dashed rgba(120,128,255,0.4); background: transparent; color: #7880ff;
    cursor: pointer; transition: all 0.2s; flex-shrink: 0;
  }
  #add-scene-btn:hover { border-color: #7880ff; background: rgba(120,128,255,0.1); }

  #sidebar {
    position: fixed; left: 0; top: 48px; bottom: 40px; width: 240px;
    background: rgba(8,8,18,0.92); backdrop-filter: blur(10px);
    border-right: 1px solid rgba(100,120,255,0.15);
    overflow-y: auto; z-index: 90; transition: transform 0.3s;
    scrollbar-width: thin; scrollbar-color: rgba(120,128,255,0.25) transparent;
  }
  #sidebar.collapsed { transform: translateX(-240px); }
  .sidebar-section { padding: 12px 16px; border-bottom: 1px solid rgba(100,120,255,0.08); }
  .sidebar-label { font-size: 9px; letter-spacing: 2px; color: #4a52a0; text-transform: uppercase; margin-bottom: 8px; }

  .obj-entry {
    display: flex; align-items: center; gap: 8px; padding: 6px 8px;
    border-radius: 4px; cursor: pointer; font-size: 11px; color: #8890cc;
    transition: background 0.15s; border: 1px solid transparent;
  }
  .obj-entry:hover { background: rgba(120,128,255,0.08); border-color: rgba(120,128,255,0.15); }
  .obj-entry.selected { background: rgba(120,128,255,0.12); border-color: rgba(120,128,255,0.3); color: #c0c8ff; }
  .obj-name { flex: 1; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
  .obj-type { font-size: 9px; padding: 2px 5px; border-radius: 2px; text-transform: uppercase; letter-spacing: 1px; flex-shrink: 0; }
  .type-mesh  { background: rgba(100,180,255,0.12); color: #60b0ff; border: 1px solid rgba(100,180,255,0.25); }
  .type-voxel { background: rgba(80,220,160,0.10); color: #40d898; border: 1px solid rgba(80,220,160,0.22); }
  .type-vector{ background: rgba(255,180,80,0.10);  color: #ffb050; border: 1px solid rgba(255,180,80,0.22); }
  .vis-toggle { margin-left: auto; font-size: 13px; opacity: 0.5; flex-shrink: 0; }
  .vis-toggle:hover { opacity: 1; }

  .prop-row { display: flex; justify-content: space-between; align-items: center; margin-bottom: 6px; }
  .prop-label { font-size: 10px; color: #505898; }
  .prop-val   { font-size: 10px; color: #8090c0; }
  input[type=range] { width: 100%; accent-color: #7880ff; height: 2px; margin: 3px 0 10px; cursor: pointer; display: block; }
  select {
    width: 100%; background: rgba(15,15,30,0.9); border: 1px solid rgba(120,128,255,0.25);
    color: #8090c0; font-size: 10px; padding: 5px 7px; border-radius: 3px;
    cursor: pointer; font-family: inherit; outline: none;
  }
  .action-btn {
    width: 100%; padding: 5px; background: transparent; font-family: inherit;
    font-size: 10px; letter-spacing: 1px; cursor: pointer; border-radius: 3px;
    text-transform: uppercase; transition: all 0.2s; margin-top: 6px; display: block;
  }
  .action-btn.primary { border: 1px solid rgba(120,128,255,0.35); color: #7880ff; }
  .action-btn.primary:hover { background: rgba(120,128,255,0.12); border-color: #7880ff; }
  .action-btn.danger  { border: 1px solid rgba(255,80,80,0.3);   color: #ff6060; }
  .action-btn.danger:hover  { background: rgba(255,80,80,0.08); border-color: #ff6060; }
  .load-file-btn {
    margin-top: 8px; width: 100%; padding: 5px; background: transparent;
    border: 1px dashed rgba(120,128,255,0.28); color: #4a5290; font-size: 10px;
    letter-spacing: 1px; text-transform: uppercase; cursor: pointer;
    border-radius: 3px; font-family: inherit; transition: all 0.2s;
  }
  .load-file-btn:hover { border-color: rgba(120,128,255,0.55); color: #7880ff; }

  #sidebar-toggle {
    position: fixed; left: 240px; top: 50%; transform: translateY(-50%);
    width: 16px; height: 48px; background: rgba(120,128,255,0.15);
    border: 1px solid rgba(120,128,255,0.25); border-left: none;
    border-radius: 0 4px 4px 0; cursor: pointer; z-index: 95;
    display: flex; align-items: center; justify-content: center;
    font-size: 8px; color: #7880ff; transition: all 0.3s;
  }
  #sidebar-toggle.hidden { left: 0; }

  #bottom-bar {
    position: fixed; bottom: 0; left: 0; right: 0; height: 40px;
    background: rgba(10,10,20,0.88); backdrop-filter: blur(10px);
    border-top: 1px solid rgba(100,120,255,0.12);
    display: flex; align-items: center; padding: 0 16px; gap: 12px; z-index: 100;
  }
  .cam-btn {
    padding: 3px 11px; border-radius: 3px; border: 1px solid rgba(120,128,255,0.28);
    background: transparent; color: #7080b0; cursor: pointer; font-size: 10px;
    font-family: inherit; letter-spacing: 1px; text-transform: uppercase; transition: all 0.2s;
  }
  .cam-btn.active { background: rgba(120,128,255,0.15); border-color: #7880ff; color: #c0c8ff; }
  .cam-btn:hover  { border-color: rgba(120,128,255,0.6); color: #b0b8ff; }
  #cam-hint  { color: #303060; font-size: 9px; letter-spacing: 1px; }
  #status    { color: #404080; font-size: 10px; margin-left: auto; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; max-width: 220px; }
  #fps-counter { color: #2a3870; font-size: 10px; flex-shrink: 0; }

  #drop-zone {
    position: fixed; inset: 0; z-index: 200;
    background: rgba(6,6,16,0.94); display: none;
    flex-direction: column; align-items: center; justify-content: center; gap: 16px;
    border: 2px dashed rgba(120,128,255,0.4);
  }
  #drop-zone.visible { display: flex; }
  .drop-icon { font-size: 52px; opacity: 0.4; }
  #drop-zone p     { font-size: 14px; letter-spacing: 3px; color: #7880ff; text-transform: uppercase; }
  #drop-zone small { font-size: 10px; color: #353565; letter-spacing: 2px; }

  #welcome {
    position: fixed; left: 260px; right: 0; top: 58px; bottom: 50px;
    display: flex; flex-direction: column; align-items: center; justify-content: center;
    gap: 18px; pointer-events: none; z-index: 50; transition: opacity 0.4s;
  }
  #welcome.hidden { opacity: 0; pointer-events: none; }
  .welcome-title { font-size: 11px; letter-spacing: 4px; color: #252550; text-transform: uppercase; }
  .welcome-hint  { font-size: 10px; letter-spacing: 2px; color: #1e1e40; }
  .welcome-load  {
    pointer-events: all; padding: 9px 28px;
    border: 1px solid rgba(120,128,255,0.35); background: transparent;
    color: #7880ff; font-family: inherit; font-size: 11px;
    letter-spacing: 2px; text-transform: uppercase; cursor: pointer; border-radius: 3px;
    transition: all 0.2s;
  }
  .welcome-load:hover { background: rgba(120,128,255,0.1); border-color: #7880ff; }

  #info-overlay {
    position: fixed; right: 14px; top: 60px;
    background: rgba(8,8,20,0.82); border: 1px solid rgba(120,128,255,0.15);
    border-radius: 4px; padding: 8px 12px; font-size: 9px;
    color: #353568; line-height: 2; letter-spacing: 1px; z-index: 89;
    transition: opacity 0.3s; pointer-events: none;
  }

  #file-input { display: none; }

  @media (max-width: 600px) {
    #sidebar { width: 200px; }
    #sidebar-toggle { left: 200px; }
    #sidebar-toggle.hidden { left: 0; }
    #cam-hint { display: none; }
    #info-overlay { display: none; }
    #welcome { left: 16px; }
  }