html, body { margin: 0; padding: 0; width: 100%; height: 100%; overflow: hidden; background: #e8ebf0; }
    #solidcraft_canvas { position: absolute; inset: 0; width: 100%; height: 100%; display: block; }
    #solidcraft_loading { position: absolute; inset: 0; display: flex; flex-direction: column; align-items: center; justify-content: center;
      color: #4a5060; font: 14px system-ui, sans-serif; background: #e8ebf0; z-index: 10; transition: opacity 300ms ease; }
    #solidcraft_loading.done { opacity: 0; pointer-events: none; }
    /* OneBSpace (OneCAD): the upstream logo image is gone — a plain wordmark instead. */
    #solidcraft_loading .wordmark { font: 600 clamp(28px, 6vmin, 52px) system-ui, sans-serif;
      letter-spacing: 0.22em; text-indent: 0.22em; color: #4a5060; user-select: none; }
    .sr-only { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }