/* Keep structural geometry in the existing Three.js views; material/result curves stay visible. */
#book,#textbook-section,.iw-bridge{display:none!important}
.bridge-bending-note{margin:10px auto;padding:10px 14px;max-width:1440px;background:#edf4f8;border-left:3px solid #406d91;font-size:12px;line-height:1.8;color:#38576c}
@media(max-width:660px){.bridge-bending-note{margin:8px 10px;font-size:11px}}