:root{color:#eef0ff;background:#090a1e;font-family:system-ui,-apple-system,Noto Sans TC,sans-serif}*{box-sizing:border-box}body{min-width:0;margin:0;background:radial-gradient(circle at 18% 5%,#30204d 0,transparent 27rem),radial-gradient(circle at 85% 14%,#1a275a 0,transparent 30rem),#090a1e}body:before,body:after{content:"";position:fixed;inset:0;pointer-events:none;background-image:radial-gradient(circle,#b9a8ff 0 1px,transparent 1.5px),radial-gradient(circle,#64c8ff 0 .8px,transparent 1.3px)}body:before{opacity:.25;background-position:1rem 2rem,7rem 5rem;background-size:16rem 13rem,23rem 19rem;animation:twinkle-a 5s ease-in-out infinite}body:after{opacity:.18;background-position:4rem 9rem,13rem 3rem;background-size:19rem 15.5rem,27rem 22rem;animation:twinkle-b 6.5s ease-in-out infinite;animation-delay:-2.3s}@keyframes twinkle-a{0%,to{opacity:.18}50%{opacity:.34}}@keyframes twinkle-b{0%,to{opacity:.1}50%{opacity:.26}}@media(prefers-reduced-motion:reduce){body:before,body:after{animation:none}}button,select{font:inherit}button{cursor:pointer}button:focus-visible,select:focus-visible,.source-vsepr-table:focus-visible{outline:3px solid #b68cff;outline-offset:3px}main{position:relative;max-width:1320px;min-width:0;margin:auto;padding:2.5rem 1.5rem 4rem}h1,h2,h3,p{margin-top:0}.eyebrow{margin-bottom:.45rem;color:#c3a7ff;font-size:.82rem;font-weight:800;letter-spacing:.1em}.quantum-overview{padding:clamp(1.25rem,4vw,3rem);border:1px solid #4b3d82;border-radius:1rem;background:linear-gradient(145deg,#191333ef,#11142eef);box-shadow:0 24px 70px #0008}.overview-header h1{margin-bottom:.65rem;font-size:clamp(2rem,6vw,4.1rem);letter-spacing:-.04em}.overview-header>p:last-child{max-width:70ch;margin-bottom:1.25rem;color:#b9b9d8;line-height:1.7}.overview-header>p.overview-subtitle{max-width:none;margin:-.2rem 0 .9rem;color:#d9d2ff;font-size:clamp(1.05rem,2.4vw,1.35rem);font-weight:600;line-height:1.4}.overview-legend{display:flex;flex-wrap:wrap;gap:.55rem 1rem;align-items:center}.overview-legend{margin-bottom:.85rem;color:#d4d1e9;font-size:.9rem}.overview-legend span{display:inline-flex;gap:.4rem;align-items:center}.overview-legend i{display:inline-block}.source-vsepr-table{--paper-line: #50427e;--ink: #eef0ff;--ink-mut: #aaa9ca;--card-bg: #10122b;--card-border: #37325d;--head-bg: #242042;--group-bg: #151332;--link: #c9a6ff;--dot: #69b7ff;--lp-fill: #3d5266;--lp-stroke: #8fb3d6;max-width:100%;overflow-x:auto;border:1px solid #50427e;border-radius:.7rem}.source-vsepr-table table{width:100%;min-width:880px;border-collapse:collapse;color:var(--ink);background:var(--card-bg);font-size:.86rem}.source-vsepr-table th{padding:.6rem .5rem;border:1px solid var(--card-border);color:var(--ink);background:var(--head-bg);text-align:center;white-space:nowrap}.source-vsepr-table td{padding:.55rem .6rem;border:1px solid var(--card-border);vertical-align:middle}.source-vsepr-table .sigma,.source-vsepr-table .hyb,.source-vsepr-table .icon{text-align:center}.source-vsepr-table .hyb{background:var(--group-bg);font-style:italic;font-weight:600}.source-vsepr-table .icon svg{overflow:visible}.source-vsepr-table .geom{white-space:nowrap}.source-vsepr-table .examples{line-height:1.9}.source-vsepr-table .group-top td{border-top-width:2px}.source-vsepr-table a.mol{color:var(--link);font-weight:600;text-decoration:none;border-bottom:1px dotted currentColor}.source-vsepr-table a.mol:hover,.source-vsepr-table a.mol[aria-current=true]{color:#fff;border-bottom-style:solid}.source-vsepr-table .mol-plain{color:var(--ink-mut)}.source-vsepr-table .mol-pair{margin-left:.3em;color:var(--ink-mut);font-size:.88em;font-weight:500}.source-vsepr-table .mol-pair a.mol{font-weight:600}.source-table-note{max-width:80ch;margin:.6rem 0 0;color:#a7a2c7;font-size:.82rem;line-height:1.65}.source-table-note a{color:#c9a6ff}.extra-molecules{margin-top:1rem}.extra-molecules-label{margin-bottom:.55rem;color:#a7a2c7;font-size:.84rem}.extra-molecules-grid{display:flex;flex-wrap:wrap;gap:.5rem}.extra-mol{display:inline-flex;flex-direction:column;align-items:flex-start;gap:.1rem;padding:.4rem .65rem;border:1px solid #50427e;border-radius:.5rem;color:#eef0ff;background:#191633;font-weight:600;line-height:1.25}.extra-mol:hover,.extra-mol[aria-current=true]{border-color:#c9a6ff;background:#2a2350}.extra-mol span{color:#aaa9ca;font-size:.74rem;font-weight:500}.legend-center{width:.8rem;height:.8rem;border-radius:50%;background:#ffd166}.legend-bp{width:.9rem;height:.2rem;background:#69b7ff}.legend-lp{width:1rem;height:.55rem;border-radius:50%;background:#cc8dff}.selected-detail,.content-panel{color:#edf0ff;background:#11132a;border:1px solid #3e3966;border-radius:.85rem;box-shadow:0 14px 34px #0005}.selected-detail{margin-top:2rem;scroll-margin-top:1rem}.detail-heading{display:flex;justify-content:space-between;align-items:center;gap:1rem;padding:1.35rem 1.4rem 0}.detail-heading h2{margin:0;font-size:clamp(1.45rem,3vw,2rem)}.detail-heading h2 span{color:#bcb8d5;font-size:.72em;font-weight:500}.back-to-overview{flex:0 0 auto;padding:.45rem .7rem;border:1px solid #6954a8;border-radius:.4rem;color:#ded4ff;background:#252047}.back-to-overview:hover{border-color:#c9a6ff;background:#3a2b65}.overview-header>.back-to-overview{display:inline-block;margin-bottom:.9rem}.detail-summary{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:.75rem 1.25rem;margin:1rem 1.4rem 0}.detail-summary div{min-width:0}.detail-summary dt{color:#a7a2c7;font-size:.82rem}.detail-summary dd{margin:.18rem 0 0;font-weight:700;overflow-wrap:anywhere}.tabs{display:flex;flex-wrap:wrap;align-items:center;gap:.2rem;margin:1.25rem 1.4rem 0;border-bottom:1px solid #575175;overflow-x:auto}.tabs button{flex:0 0 auto;padding:.72rem 1rem;border:0;border-bottom:3px solid transparent;color:#b6b3cf;background:transparent;font-weight:700}.tabs button[aria-selected=true]{color:#dac1ff;border-bottom-color:#bc8dff}.tabs button[aria-pressed=true]{color:#dac1ff}.tab-chip{display:inline-flex;align-items:center}.tab-chip-open button:not([aria-selected=true]):not([aria-pressed=true]){color:#d4d1e9}.tab-close{flex:0 0 auto;margin:0 .3rem 0 -.4rem;padding:0 .35rem;border-radius:.3rem;color:#8f89ad;background:transparent;font-size:1rem;line-height:1.6}.tab-close:hover{color:#f5f0ff;background:#2a2350}.tabs-split-toggle{flex:0 0 auto;margin:0 0 .3rem auto;padding:.4rem .7rem;border:1px solid #6954a8;border-radius:.4rem;color:#ded4ff;background:#252047;font-weight:700;font-size:.85rem}.tabs-split-toggle:hover,.tabs-split-toggle[aria-pressed=true]{border-color:#c9a6ff;background:#3a2b65}.detail-panels-split{display:flex;flex-wrap:wrap;gap:1.25rem;align-items:start;margin-top:0}.detail-panels-split>*{flex:1 1 280px;min-width:0;margin-top:0;border-radius:.85rem}@media(max-width:820px){.detail-panels-split{flex-direction:column}}.detail-panel{margin-top:0;border:0;border-radius:0 0 .85rem .85rem;box-shadow:none}.content-panel{padding:1.4rem}.panel-heading{display:flex;justify-content:space-between;align-items:start;gap:1rem;margin-bottom:1rem}.panel-heading h2{margin-bottom:.3rem}.panel-heading p,figcaption{margin-bottom:0;color:#b9b9d8;line-height:1.55}.notice{flex:0 0 auto;padding:.35rem .55rem;color:#2c1b00;background:#ffd166;border-radius:.3rem;font-size:.85rem;font-weight:800}.diagram-card{max-width:31rem;margin:0 auto;text-align:center}.domain-diagram{display:block;width:min(100%,22rem);margin:0 auto}.domain-diagram text{fill:#f5f3ff;font-size:18px;font-weight:800;text-anchor:middle}.domain-diagram .charge{font-size:10px;baseline-shift:super}.formal-charge circle{fill:#f5f3ff;stroke:#1b1740;stroke-width:1.5}.formal-charge text{fill:#1b1740;font-size:12px;font-weight:800;text-anchor:middle}.center-atom circle{fill:#ffd166;stroke:#8c6400;stroke-width:2}.outer-atom circle{fill:#397db7;stroke:#9bd5ff;stroke-width:2}.bond-lines line{stroke:#e9e6ff;stroke-width:3}.domain-line{stroke-width:3;stroke-dasharray:7 5}.domain-line.bp{stroke:#69b7ff}.domain-line.lp{stroke:#cc8dff}.lone-pair circle{fill:#cc8dff}.lone-pair text{fill:#e6d4ff;font-size:11px}.unpaired-electron circle{stroke:#edf0ff;stroke-width:1.5}.vsepr-layout{display:grid;grid-template-columns:minmax(18rem,1.2fr) minmax(15rem,1fr);align-items:center;gap:1.5rem}.explanation{padding:1rem;color:#dad8ec;background:#1c1b3c;border-left:4px solid #b783ff}.explanation h3{margin-bottom:.7rem}.explanation p{line-height:1.6}.explanation p:last-child{margin-bottom:0}.imf-reasoning{display:flex;flex-direction:column;gap:.9rem;margin:0 0 1.25rem;padding:0;list-style:none;counter-reset:imf-step}.imf-reasoning li{position:relative;padding:.1rem 0 .1rem 2.3rem;color:#dad8ec;line-height:1.65}.imf-reasoning li:before{counter-increment:imf-step;content:counter(imf-step);position:absolute;left:0;top:.05rem;display:inline-flex;align-items:center;justify-content:center;width:1.7rem;height:1.7rem;border-radius:50%;color:#1c1533;background:#c9a6ff;font-weight:800;font-size:.85rem}.imf-reasoning strong{display:block;margin-bottom:.2rem;color:#edf0ff}.imf-conclusion{padding:1rem;color:#f1edff;background:#1c1b3c;border-left:4px solid #b783ff;line-height:1.65}.imf-conclusion strong{color:#dac1ff}.quantum-overview>.content-panel{margin-top:1.5rem}.imf-concept-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(16rem,1fr));gap:1.1rem}.imf-property-list{display:flex;flex-direction:column;gap:.85rem;margin:0;padding-left:1.3rem;color:#dad8ec;line-height:1.65}.imf-property-list strong{color:#edf0ff}.imf-example-groups{display:flex;flex-direction:column;gap:1.25rem;margin-top:1rem}.imf-example-group h3{display:flex;flex-wrap:wrap;align-items:baseline;gap:.5rem;margin-bottom:.6rem;font-size:1rem}.imf-example-group h3 span{color:#a7a2c7;font-size:.82rem;font-weight:500}.imf-example-links{display:flex;flex-wrap:wrap;gap:.5rem}.imf-example-link{padding:.4rem .8rem;border:1px solid #4b3d82;border-radius:.5rem;color:#edf0ff;background:#151332;text-decoration:none;font-weight:700}.imf-example-link:hover{border-color:#c9a6ff;background:#1c1740}.resonance-figure{margin:0;display:flex;flex-direction:column;align-items:center;gap:.6rem}.resonance-figure svg{width:100%;max-width:720px;height:auto;overflow:visible}.resonance-figure svg.resonance-hybrid{max-width:270px}.resonance-atom{fill:#eef0ff;font-size:17px;font-weight:700;text-anchor:middle;dominant-baseline:central}.resonance-charge{fill:#ffd166;font-size:13px;font-weight:700;text-anchor:middle;dominant-baseline:central}.resonance-partial{fill:#ffd166;font-size:11px;font-weight:600;text-anchor:middle;dominant-baseline:central}.resonance-bond{stroke:#b9a8ff;stroke-width:2;stroke-linecap:round}.resonance-bond-partial{stroke-dasharray:4 3.5}.resonance-lp circle{fill:#cc8dff}.resonance-bracket path{fill:none;stroke:#8f89ad;stroke-width:1.5}.resonance-arrow{fill:#c9a6ff;font-size:24px;text-anchor:middle;dominant-baseline:central}.resonance-figure figcaption{max-width:70ch;color:#cfcce6;font-size:.9rem;line-height:1.7}.resonance-figure figcaption p{margin:0 0 .4rem}.resonance-figure figcaption strong{color:#edf0ff}.advanced-note{margin-top:1.1rem;padding:.7rem .9rem;border:1px dashed #50427e;border-radius:.6rem;background:#151332;color:#dad8ec;line-height:1.7}.advanced-note summary{min-height:44px;display:flex;align-items:center;color:#c9a6ff;font-weight:600;cursor:pointer}.advanced-note p{margin:.6rem 0 0}.bond-series-wrap{max-width:100%;overflow-x:auto;border:1px solid #37325d;border-radius:.7rem}.bond-series-table{width:100%;border-collapse:collapse;color:#dad8ec;background:#10122b;font-size:.92rem;font-variant-numeric:tabular-nums}.bond-series-table th,.bond-series-table td{padding:.55rem .8rem;border-bottom:1px solid #2a2550;text-align:center;white-space:nowrap}.bond-series-table thead th{color:#eef0ff;background:#242042;font-weight:600}.bond-series-table tbody th{color:#edf0ff;font-weight:600}.bond-series-table tbody+tbody tr:first-child>*{border-top:2px solid #50427e}.bond-series-caption th{text-align:left;background:#151332;font-weight:500;white-space:normal}.bond-series-highlight{color:#8ff5f1;font-weight:600}.bond-series-ref>*{color:#a7a2c7;font-size:.84rem}.bond-series-ref a{color:#c9a6ff}@media(max-width:560px){.bond-series-table{font-size:.82rem}.bond-series-table th,.bond-series-table td{padding:.45rem .3rem}.bond-series-table th,.bond-series-ref td{white-space:normal}}.imf-property-list li .imf-example-link{margin-right:.5rem}.viewer-panel{min-height:570px;padding-bottom:0;overflow:hidden}.viewer-panel .panel-heading{padding-bottom:.8rem}.viewer-panel .panel-heading label{min-width:10rem;color:#ddd9f3;font-size:.9rem}select{padding:.45rem;border:1px solid #6c6595;border-radius:.35rem;color:#f1edff;background:#232144}.viewer{position:relative;height:490px;margin:0 -1.4rem;overflow:hidden;border-top:1px solid #3e3966}.error{margin:0 0 1rem;padding:.75rem 1rem;color:#ffd0d0;background:#5c202c;border-radius:.4rem}.dft-panel{margin-top:0;border:0;border-radius:0 0 .85rem .85rem;box-shadow:none}.dft-frame{display:block;width:100%;height:900px;border:0;background:transparent}@media(max-width:820px){.detail-summary{grid-template-columns:repeat(2,minmax(0,1fr))}.vsepr-layout{grid-template-columns:1fr}}@media(max-width:560px){main{padding:1rem .75rem 2.5rem}.quantum-overview{padding:1.1rem}.overview-header h1{font-size:2.15rem}.detail-summary{grid-template-columns:1fr;margin:1rem}.detail-heading{align-items:flex-start;flex-direction:column;padding:1rem 1rem 0}.tabs{margin:1.25rem 1rem 0}.panel-heading{flex-direction:column}.viewer-panel{min-height:460px}.viewer{height:380px}}.breadcrumb{display:flex;flex-wrap:wrap;gap:.45rem;align-items:center;max-width:1320px;margin:0 auto;padding:1.4rem 1.5rem 0;color:#a7a2c7;font-size:.88rem}.breadcrumb a{color:#c9a6ff;text-decoration:none}.breadcrumb a:hover{color:#fff;text-decoration:underline}.breadcrumb [aria-current=page]{color:#edf0ff;font-weight:700}.chapter-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(15rem,1fr));gap:1.1rem;margin-top:1.5rem}.chapter-card{display:flex;flex-direction:column;gap:.4rem;padding:1.35rem 1.4rem;border:1px solid #4b3d82;border-radius:.85rem;color:#edf0ff;background:#151332;text-decoration:none}.chapter-card:hover{border-color:#c9a6ff;background:#1c1740}.chapter-card h2{font-size:1.25rem}.chapter-card p{margin:0;color:#b9b9d8;line-height:1.55;flex-grow:1}.chapter-card-eyebrow{color:#c3a7ff;font-size:.78rem;font-weight:800;letter-spacing:.08em}.chapter-card-action{display:inline-flex;gap:.4rem;align-items:center;margin-top:.4rem;color:#c9a6ff;font-weight:700;font-size:.92rem}.chapter-card-disabled{cursor:default;opacity:.55}.chapter-card-disabled:hover{border-color:#4b3d82;background:#151332}.chapter-card-soon{padding:.2rem .55rem;border-radius:.3rem;color:#d4d1e9;background:#232144;font-size:.78rem}.knowledge-tree-entry{display:inline-flex;gap:.4rem;align-items:center;margin-top:1.25rem;padding:.55rem .9rem;border:1px solid #4b3d82;border-radius:.5rem;color:#dac1ff;background:#191333;text-decoration:none;font-weight:700}.knowledge-tree-entry:hover{border-color:#c9a6ff;background:#241d4a}.kt-scroll{max-width:100%;margin-top:1.5rem;overflow-x:auto}.kt-canvas{position:relative;margin:0 auto}.kt-edges{position:absolute;top:0;left:0;overflow:visible}.kt-edges path{stroke:#574f8c;stroke-width:2}.kt-node{position:absolute;padding:.65rem .8rem;border:1px solid #4b3d82;border-radius:.6rem;color:#edf0ff;background:#151332;font-weight:700;font-size:.92rem;line-height:1.35;text-align:center}.kt-node:hover{border-color:#c9a6ff;background:#1c1740}.kt-node[aria-current=true]{border-color:#c9a6ff;background:#2a2350;box-shadow:0 0 0 3px #c9a6ff44}.kt-detail{margin-top:1.5rem}.kt-detail p{color:#dad8ec;line-height:1.65}.kt-formula{margin-top:.75rem;padding:.75rem 1rem;border-left:4px solid #b783ff;color:#f1edff;background:#1c1b3c;font-family:ui-monospace,Cascadia Code,SFMono-Regular,monospace;font-size:.88rem;line-height:1.8;white-space:pre-wrap}.compare-empty{margin-top:1rem;color:#a7a2c7}.source-vsepr-table.compare-mode a.mol:before{content:"☐";margin-right:.3em;opacity:.6}.source-vsepr-table.compare-mode a.mol[aria-current=true]{color:#fff;background:#3a2b65;border-radius:.3rem;padding:.05rem .35rem;border-bottom-style:solid}.source-vsepr-table.compare-mode a.mol[aria-current=true]:before{content:"☑";color:#8ff5f1;opacity:1}.extra-molecules-grid.compare-mode .extra-mol:before{content:"☐ ";opacity:.6}.extra-molecules-grid.compare-mode .extra-mol[aria-current=true]:before{content:"☑ ";color:#8ff5f1;opacity:1}.extra-molecules-grid.compare-mode .extra-mol[aria-current=true]{border-color:#8ff5f1;background:#2a2350}.compare-chips{display:flex;flex-wrap:wrap;gap:.5rem;margin-top:1.1rem}.compare-chip{display:inline-flex;gap:.4rem;align-items:center;padding:.35rem .6rem;border:1px solid #c9a6ff;border-radius:.5rem;color:#f5f0ff;background:#2a2350;font-weight:700}.compare-chip:hover{background:#3a2b65}.compare-table-wrap{max-width:100%;margin-top:1.5rem;overflow-x:auto;border:1px solid #37325d;border-radius:.7rem}.compare-table{width:100%;min-width:640px;border-collapse:collapse;font-size:.88rem}.compare-table th,.compare-table td{padding:.6rem .75rem;border:1px solid #37325d;text-align:left;vertical-align:top}.compare-table thead th{background:#191633;color:#edf0ff;white-space:nowrap}.compare-table thead th span{display:block;color:#a7a2c7;font-size:.78rem;font-weight:500}.compare-table tbody th{background:#151332;color:#d4d1e9;font-weight:600;white-space:nowrap}.compare-table tbody td{color:#edf0ff}.compare-imf-link{color:#edf0ff;text-decoration:underline dotted;text-underline-offset:.2em}.compare-imf-link:hover{color:#c9a6ff}.mb-offline-banner{border-left:4px solid #e0b25c;background:#2a2210}.mb-offline-banner-row{display:flex;flex-wrap:wrap;align-items:center;gap:1rem}.mb-offline-banner-row>div{flex:1 1 18rem}.mb-offline-banner strong{color:#ffd18a}.mb-offline-banner p{margin:.4rem 0 0;color:#ddd0b0;line-height:1.6}.mb-offline-banner button{flex:0 0 auto;padding:.5rem 1rem;border:1px solid #e0b25c88;border-radius:.5rem;color:#ffd18a;background:#3a2c10}.mb-offline-banner button:hover:not(:disabled){border-color:#e0b25c;background:#4a3714}.mb-offline-banner button:disabled{opacity:.6;cursor:default}.mb-examples-row{display:flex;flex-wrap:wrap;align-items:center;gap:.5rem}.mb-examples-label{margin-right:.3rem;color:#a7a2c7;font-size:.82rem}.mb-examples-row button{padding:.4rem .75rem;border:1px solid #4b3d82;border-radius:.5rem;color:#edf0ff;background:#151332;font-size:.82rem}.mb-examples-row button:hover:not(:disabled){border-color:#c9a6ff;background:#1c1740}.mb-examples-row button:disabled{opacity:.5;cursor:default}.mb-saved-row{margin-top:.6rem;padding-top:.6rem;border-top:1px solid #292552}.mb-saved-chip{display:inline-flex;align-items:stretch;border:1px solid #4b3d82;border-radius:.5rem;overflow:hidden}.mb-saved-chip button:first-child{border:0;border-radius:0}.mb-saved-remove{padding:.4rem .55rem;border:0;border-left:1px solid #4b3d8288;border-radius:0;color:#c7a2a2;background:#1c1332;font-size:.82rem}.mb-saved-remove:hover{color:#ffb3b3;background:#2a1c30}.mb-compare-checkbox{display:inline-flex;align-items:center;gap:.35rem;padding:.4rem .6rem;color:#edf0ff;font-size:.82rem}.mb-compare-toggle{margin-left:auto}.mb-compare-table-wrap{margin-top:.8rem;padding-top:.8rem;border-top:1px solid #292552;overflow-x:auto}.mb-compare-table{width:100%;min-width:420px;border-collapse:collapse;font-size:.82rem}.mb-compare-table th,.mb-compare-table td{padding:.5rem .6rem;border:1px solid #3e3966;text-align:left;color:#edf0ff;vertical-align:top}.mb-compare-table th{background:#1c1740;color:#c9a6ff;font-weight:600;white-space:nowrap}.mb-compare-table tbody tr:nth-child(2n){background:#14122c}.mb-workspace{padding:1rem}.mb-grid{display:grid;grid-template-columns:minmax(0,1fr);gap:1.25rem}.mb-viewer-body{display:grid;grid-template-columns:minmax(0,1.1fr) minmax(0,1fr);align-items:start;margin-top:.9rem}.mb-viewer-main{position:sticky;top:.75rem;min-width:0;border-right:1px solid #292552;background:#11132a}.mb-viewer-side{min-width:0}.mb-viewer-side .result{margin:0;padding:.9rem 1.1rem}.mb-viewer-side .formula-line{display:flex;flex-wrap:wrap;align-items:baseline;gap:.3rem .7rem}.mb-viewer-side .formula-line strong{color:#edf0ff;font-size:1.2rem}.mb-viewer-side .formula-line span{color:#a7a2c7;font-size:.8rem}.mb-viewer-side .result p{margin:.4rem 0 0;color:#c7c2dd;font-size:.88rem;line-height:1.6}.mb-viewer-side .result code{display:block;margin-top:.4rem;color:#8ff5f1;font-size:.8rem;overflow-wrap:anywhere}.mb-viewer-side .mb-vsepr-info,.mb-viewer-side .mb-dft-info{font-size:.92rem}.mb-editor,.mb-viewer{min-width:0;border:1px solid #3e3966;border-radius:.7rem;background:#11132a;overflow:clip}.mb-editor .panel-heading,.mb-viewer .panel-heading{padding:1rem 1.1rem 0}.mb-frame-wrap{position:relative;height:540px;margin-top:.9rem;background:#0c1a2f;overflow:hidden}.mb-frame-wrap iframe{display:block;width:100%;height:100%;border:0}.mb-loading{position:absolute;inset:0;display:flex;align-items:center;justify-content:center;background:#08152799;color:#7fe8ff;font-size:.9rem;text-align:center;padding:1rem}.mb-actions{display:flex;flex-wrap:wrap;gap:.5rem;padding:.9rem 1.1rem;border-top:1px solid #292552}.mb-actions button{padding:.5rem .9rem;border:1px solid #4b3d82;border-radius:.5rem;color:#edf0ff;background:#151332;font-size:.85rem}.mb-actions .primary{border:0;background:linear-gradient(135deg,#7d5fd6,#3f8fc9);color:#fff;font-weight:700}.mb-actions button:hover:not(:disabled){border-color:#c9a6ff;background:#1c1740}.mb-actions button:disabled{opacity:.5;cursor:default}.mb-viewer-canvas{position:relative;height:460px;overflow:hidden;background-color:#0b1224;background-image:radial-gradient(circle at 22% 20%,#7fe8ffae 0 .8px,transparent 1.5px),radial-gradient(circle at 76% 68%,#b7a4ff9e 0 .8px,transparent 1.6px),linear-gradient(160deg,#11264633,#060d1d38);background-size:260px 260px,330px 330px,100% 100%;background-repeat:repeat,repeat,no-repeat}.mb-placeholder{position:absolute;z-index:2;inset:0;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:.6rem;color:#ddd9f3;text-align:center;pointer-events:none}.mb-placeholder strong{color:#e8f5ff;font-size:1rem;font-weight:500}.mb-placeholder span{color:#a9bed6;font-size:.8rem}.mb-orb{display:grid;place-items:center;width:3.6rem;height:3.6rem;border:1px solid #7fe8ffa8;border-radius:50%;background:radial-gradient(circle at 35% 30%,#29466b,#111e3d 68%,#0b1224);color:#7fe8ff;font-size:1.05rem}.mb-density-pending{position:absolute;z-index:3;inset:0;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:.6rem;padding:1.5rem;text-align:center;background:#0b1224e6;color:#dce8ff}.mb-density-pending strong{font-size:1.05rem}.mb-density-pending p{max-width:24rem;margin:0;color:#aebcd7;line-height:1.7;font-size:.88rem}.mb-view-controls{display:flex;flex-wrap:wrap;align-items:center;gap:.6rem;padding:.8rem 1.1rem;border-top:1px solid #292552;font-size:.85rem}.mb-view-controls label{color:#ddd9f3}.mb-view-controls label:last-of-type{margin-right:auto}.mb-view-controls button{padding:.4rem .7rem;border:1px solid #4b3d82;border-radius:.4rem;color:#edf0ff;background:#151332;font-size:.8rem}.mb-view-controls button:disabled{opacity:.5;cursor:default}.mb-dft-info{padding:.8rem 1.1rem;border-top:1px solid #292552;color:#b9b9d8;font-size:.85rem}.mb-dft-info p{margin:0 0 .5rem;line-height:1.6}.mb-dft-info button{padding:.45rem .8rem;border:1px solid #4b3d82;border-radius:.5rem;color:#edf0ff;background:#151332}.mb-iso-controls{display:flex;flex-wrap:wrap;align-items:center;gap:.6rem}.mb-iso-controls label{display:flex;align-items:center;gap:.5rem;flex:1 1 14rem;color:#ddd9f3}.mb-iso-controls input[type=range]{flex:1;accent-color:#b783ff}.mb-legend{flex:1 1 100%;color:#a7a2c7;font-size:.76rem}.mb-vsepr-info{padding:1.1rem;border-top:1px solid #292552;color:#d4e4fa;line-height:1.7}.mb-vsepr-heading{display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:.5rem;margin-bottom:.5rem}.mb-vsepr-heading strong{color:#adceff}.mb-vsepr-info select{max-width:11rem}.mb-vsepr-info dl{display:grid;grid-template-columns:1fr 1fr;gap:.3rem 1.2rem;margin:.6rem 0}.mb-vsepr-info dt{color:#97aecf}.mb-vsepr-info dd{margin:0;text-align:right}.mb-vsepr-info #vseprSummary{color:#cfb9ff;font-size:1.05rem;font-weight:600}.mb-vsepr-info small{display:block;margin-top:.5rem;color:#aebcd7;line-height:1.6}.mb-vsepr-info>button{margin-top:.7rem;padding:.45rem .8rem;border:1px solid #4b3d82;border-radius:.5rem;color:#edf0ff;background:#151332;font-size:.85rem}.mb-vsepr-info>button:hover:not(:disabled){border-color:#c9a6ff;background:#1c1740}.mb-vsepr-info>button:disabled{opacity:.5;cursor:default}.mb-all-angles{margin-top:.6rem;padding:.8rem .9rem;border:1px solid #322a55;border-radius:.6rem;background:#151332;font-size:.88rem}.mb-all-angles-note{margin:0 0 .6rem;color:#97aecf;font-size:.8rem}.mb-dft-geometry{color:#86efac}.mb-all-angles-group{margin-bottom:.6rem}.mb-all-angles-group:last-child{margin-bottom:0}.mb-all-angles-group strong{color:#adceff}.mb-all-angles-group ul{margin:.25rem 0 0;padding-left:1.2rem;color:#d4e4fa}.mb-all-angles-group li{padding:0 .3rem;border-radius:.3rem;line-height:1.8}.mb-all-angles-group li:hover{background:#2a2350;color:#fff;cursor:default}.mb-lp-angle{color:#cfb9ff}.mb-all-angles>ul{margin:.25rem 0 0;padding-left:1.2rem;color:#d4e4fa}.mb-all-angles>ul>li{padding:0 .3rem;border-radius:.3rem;line-height:1.8}.mb-all-angles>ul>li:hover{background:#2a2350;color:#fff;cursor:default}.mb-polarity-summary{margin-top:.7rem;padding-top:.6rem;border-top:1px solid #292552}.mb-polarity-summary p{margin:0 0 .4rem}.mb-polarity-summary label{display:block;margin-top:.4rem;color:#ddd9f3}.mb-bond-row{display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:.5rem;padding:.2rem 0}.mb-bond-energy-btn{flex:0 0 auto;padding:.3rem .6rem;border:1px solid #4b3d82;border-radius:.4rem;color:#edf0ff;background:#1c1740;font-size:.78rem}.mb-bond-energy-btn:hover:not(:disabled){border-color:#c9a6ff}.mb-bond-energy-btn:disabled{opacity:.5;cursor:default}.mb-bond-energy-cancel{border-color:#5a5470;color:#c7c2dd;background:transparent}.mb-bond-energy-cancel:hover{border-color:#97aecf;color:#edf0ff}.mb-bond-energy-status{margin:.1rem 0 .5rem;color:#97aecf;font-size:.82rem;line-height:1.6}.mb-bond-energy-error{color:#ffb3b3}.mb-bond-energy-result{color:#b3ffcf}.mb-warnings{color:#ffd18a}.mb-polarity-primary{margin-bottom:.3rem;color:#eef0ff;font-size:1rem}.mb-polarity-primary strong{color:#b3ffcf}.mb-polarity-secondary{color:#b9b9d8;font-size:.88rem}.mb-polarity-label{color:#97aecf;font-weight:600}.mb-polarity-pending{color:#b893ff}.mb-limits>summary{cursor:pointer;color:#ddd9f3;font-size:1.05rem;font-weight:600}.mb-limits>summary:hover{color:#c9a6ff}.mb-limits[open]>summary{margin-bottom:.9rem}.mb-limits-intro,.mb-limits-summary{color:#b9b9d8;font-size:.88rem;line-height:1.7}.mb-limits-summary{margin-top:1rem;padding-top:.9rem;border-top:1px solid #37325d;color:#ddd9f3}.mb-limits-layer{margin-top:1rem;padding:.8rem .95rem;border:1px solid #37325d;border-left:3px solid #50427e;border-radius:.55rem;background:#10122b}.mb-limits-layer-warn{border-left-color:#ffd18a}.mb-limits-layer h3{margin:0 0 .55rem;color:#eef0ff;font-size:.95rem}.mb-limits-section-heading{margin:1.8rem 0 .5rem;padding-top:1.1rem;border-top:1px solid #37325d;color:#eef0ff;font-size:1rem}.mb-limits-group-note{margin:-.2rem 0 .6rem;color:#97aecf;font-size:.82rem;line-height:1.6}.mb-limits-layer dl{display:grid;grid-template-columns:minmax(5.5rem,8rem) 1fr;gap:.4rem .9rem;margin:0}.mb-limits-layer dt{color:#97aecf;font-size:.84rem;font-weight:600}.mb-limits-layer dd{margin:0;color:#b9b9d8;font-size:.84rem;line-height:1.65}@media(max-width:1000px){.mb-viewer-body{grid-template-columns:minmax(0,1fr)}.mb-viewer-main{position:static;border-right:0}.mb-viewer-side{border-top:1px solid #292552}}@media(max-height:760px){.mb-viewer-main{position:static}.mb-viewer-canvas{height:400px}}@media(max-width:560px){.mb-frame-wrap{height:460px}.mb-viewer-canvas{height:340px}.mb-workspace{padding:.75rem}.mb-limits-layer dl{grid-template-columns:1fr;gap:.15rem}.mb-limits-layer dd{margin-bottom:.5rem}}.shape-browser-mobile,.shape-browser-toggle{display:none}.shape-list{display:flex;flex-direction:column;gap:.9rem}.shape-list-group h3{display:flex;align-items:baseline;gap:.5rem;margin:0 0 .45rem;color:#edf0ff;font-size:.95rem}.shape-list-group h3 span{color:#a7a2c7;font-size:.82rem;font-weight:500}.detail-links{display:flex;flex-wrap:wrap;gap:.5rem;margin:.8rem 1.4rem 0}.compare-sticky{position:sticky;bottom:.6rem;z-index:5;display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:.5rem 1rem;margin-top:1rem;padding:.6rem .8rem;border:1px solid #c9a6ff;border-radius:.7rem;background:#221b45f2;box-shadow:0 10px 30px #000a;color:#edf0ff;font-size:.9rem}.compare-sticky span{min-width:0;overflow-wrap:anywhere}.compare-sticky button{min-height:44px;padding:.4rem .9rem;border:1px solid #c9a6ff;border-radius:.5rem;color:#fff;background:#3a2b65;font-weight:700}@media(max-width:560px){.shape-browser-mobile{display:block}.shape-browser-toggle{display:inline-flex;align-items:center;min-height:44px;margin:.9rem 0;padding:.4rem .8rem;border:1px solid #50427e;border-radius:.5rem;color:#c9a6ff;background:#151332}.shape-browser:not(.show-table) .shape-browser-table{display:none}.shape-browser.show-table .shape-browser-mobile{display:none}.shape-list .extra-mol{min-height:44px;justify-content:center}.detail-links{margin:.8rem 1rem 0}.tab-close,.mb-saved-remove,.compare-chip{min-width:44px;min-height:44px;justify-content:center}.mb-bond-energy-btn{min-height:44px;padding:.4rem .8rem}.imf-example-link{min-height:44px;display:inline-flex;align-items:center}}.touch-guard{position:absolute;inset:0;z-index:4;display:flex;align-items:flex-end;justify-content:center;padding:0 0 1rem;border:0;background:transparent}.touch-guard span{padding:.55rem .9rem;border:1px solid #c9a6ff;border-radius:999px;color:#fff;background:#221b45e6;font-size:.88rem;font-weight:700}.touch-guard-done{position:absolute;right:.6rem;bottom:.6rem;z-index:4;min-height:44px;padding:.4rem .9rem;border:1px solid #c9a6ff;border-radius:999px;color:#fff;background:#3a2b65;font-weight:700}.mb-summary-card{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:.6rem 1rem;margin:.8rem 1.1rem 0;padding:.8rem 1rem;border:1px solid #50427e;border-radius:.7rem;background:#151332}.mb-summary-card>div{display:flex;flex-direction:column;gap:.15rem;min-width:0}.mb-summary-card span{color:#a7a2c7;font-size:.78rem}.mb-summary-card strong{color:#edf0ff;font-size:.98rem;overflow-wrap:anywhere}.mb-summary-card small{color:#97aecf;font-size:.76rem}.mb-summary-card button{grid-column:1 / -1;justify-self:start;min-height:40px;padding:.35rem .8rem;border:1px solid #50427e;border-radius:.5rem;color:#c9a6ff;background:transparent}.mb-reliability{margin:.5rem 0}.mb-reliability summary{min-height:36px;display:flex;align-items:center;color:#c9a6ff;font-size:.86rem;cursor:pointer}.mb-imported{margin:.6rem 0 0;color:#8ff5f1;font-size:.86rem}@media(max-width:560px){.mb-summary-card{grid-template-columns:1fr;margin:.8rem .2rem 0}.mb-summary-card button,.mb-reliability summary{min-height:44px}}@media(max-width:560px){.mb-frame-wrap{width:calc(100vw - 16px);margin-left:calc(50% - 50vw + 8px)}.mb-workspace button,.mb-examples button,.mb-workspace select{min-height:44px}}