.cpack-v3-page{display:block;min-width:0}.cpack-v3-page .content-grid{display:block}.cpack-v3-page .tab-lead:empty{display:none}.cpack-v3-page .lesson-card{margin:0;padding:22px;border:1px solid #dce3ed;border-radius:15px;background:var(--card-bg,#fff);box-shadow:0 3px 14px #1f344306;min-width:0}.cpack-v3-page .card-edit-tools{display:none}.cpack-v3-page h3{margin-top:0}.cpack-v3-page .callout{border-left:4px solid #4378b7;background:#eef5ff}.cpack-v3-page .example-answer,.cpack-v3-page .quiz-why{display:none}.cpack-v3-page .example-answer.show,.cpack-v3-page .quiz-why.show{display:block}.cpack-v3-page .quiz-options{display:flex;flex-wrap:wrap;gap:8px;margin:10px 0}.cpack-v3-page button{font:inherit;cursor:pointer;padding:9px 14px;border:1px solid #dce3ed;background:#fff;color:#27384b;border-radius:8px}.cpack-v3-page button.correct{background:#dcfce7}.cpack-v3-page button.wrong{background:#ffe4e6}.cpack-v3-page img,.cpack-v3-page video{max-width:100%;border-radius:9px}.cpack-v3-page table{width:100%;border-collapse:collapse}.cpack-v3-page td,.cpack-v3-page th{padding:10px;border:1px solid #dce3ed}.cpack-v3-page .property-grid,.cpack-v3-page .step-list{display:grid;gap:10px}.cpack-v3-page .property-item{display:flex;gap:8px}.cpack-v3-page .cpv-geometry-stage{display:grid;grid-template-columns:1.6fr 1fr;gap:16px}.cpack-v3-page .cpv-model-canvas,.cpack-v3-page .cpv-diagram{width:100%;height:auto}.cpack-v3-page .cpv-model-controls{display:flex;gap:8px;flex-wrap:wrap}.cpack-v3-page .cpv-model-note{font-size:12px;color:#64748b}.cpack-topic-switch{font:inherit;border:1px solid #d3dfeb;background:#fff;border-radius:8px;padding:8px;color:#2b405a}.cpack-loading{padding:28px;border-radius:14px;background:linear-gradient(90deg,#edf1f6,#fafcff,#edf1f6);font-size:15px}.cpack-v3-page .cpack-component.is-selected{outline:3px solid #4991ed;outline-offset:4px;border-radius:16px}@media(max-width:650px){.cpack-v3-page .cpv-geometry-stage{grid-template-columns:1fr}.cpack-v3-page .lesson-card{padding:16px}}body.cpack-organized #subTabs{display:flex;flex-wrap:wrap;align-items:flex-start;gap:10px}body.cpack-organized #lessonView .lesson-shell{min-width:0}body.cpack-organized #lessonView .lesson-subtopic{max-width:100%}.cpack-v3-page .lesson-card{color:var(--v3-text,inherit)}.cpack-v3-page h3{color:var(--v3-heading,inherit)}.cpack-spinner{display:inline-block;width:22px;height:22px;border:3px solid #c9d9ea;border-top-color:#286cb5;border-radius:50%;animation:cpack-spin .8s linear infinite;vertical-align:middle;margin-right:10px}@keyframes cpack-spin{to{transform:rotate(360deg)}}.drawer-topic summary,.drawer-subtopic summary{cursor:pointer;padding:12px;font-weight:600}.drawer-page-btn{display:block;width:100%;text-align:left;margin:6px 0;border:1px solid #dbe4ee;border-radius:10px;padding:12px;background:#fff}