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var(--dark-line)}.about-panel details:last-of-type{border-bottom:1px solid var(--dark-line)}.about-panel summary{cursor:pointer;justify-content:space-between;padding:16px 0;font-size:14px;font-weight:600;list-style:none;display:flex}.about-panel summary:after{content:"+";color:var(--orange);font-family:var(--font-mono), monospace}.about-panel details[open] summary:after{content:"−"}.about-panel summary::-webkit-details-marker{display:none}.about-panel details p,.about-panel details ul{color:#82999c;margin:-2px 0 19px;font-size:13px;line-height:1.65}.about-panel details ul{padding-left:17px}.about-foot{color:#607a7e;font-family:var(--font-mono), monospace;text-transform:uppercase;letter-spacing:.06em;margin:24px 0 0;font-size:10px;line-height:1.7}.solve-footer{border-top:1px solid var(--dark-line);background:#0d232a;flex:none;padding:17px 28px 19px}.solve-button{color:#fff;width:100%;font-family:var(--font-mono), monospace;letter-spacing:.08em;text-transform:uppercase;cursor:pointer;background:#b84229;border:0;justify-content:space-between;padding:15px 17px;font-size:12px;font-weight:600;display:flex}.solve-button:hover:not(:disabled){background:#a63822}.solve-button:disabled{cursor:wait;opacity:.7}.solve-message{color:#8ca1a4;align-items:center;gap:9px;min-height:34px;padding:10px 0 6px;font-size:12px;display:flex}.solve-message i{flex:none}.solve-footer>small{border-top:1px solid var(--dark-line);color:#617b7f;font-family:var(--font-mono), monospace;text-transform:uppercase;padding-top:9px;font-size:10px;display:block}.provenance-bar{text-align:center;color:#738589;border-top:1px solid var(--dark-line);font-family:var(--font-mono), monospace;letter-spacing:.055em;text-transform:uppercase;background:#061319;flex-wrap:wrap;flex:none;justify-content:center;align-items:center;gap:7px;padding:8px 14px;font-size:12px;display:flex}.provenance-bar i{color:var(--orange);font-style:normal}@media (min-width:900px){html{scrollbar-gutter:auto}.app-shell{height:100dvh;overflow:hidden}.model-workspace{flex-direction:row}.scene-pane{border-right:1px solid var(--dark-line);flex:auto}.canvas-area{min-height:0}.side-panel{border-top:0;flex:0 0 380px}.panel-content{scrollbar-width:thin;scrollbar-color:#385159 transparent;overflow-y:auto}}@media (prefers-reduced-motion:reduce){.solver-overlay>span{animation:none}}