#btn-ionic{cursor:pointer;color:#fff;background:linear-gradient(135deg,#ff512f 0%,#dd2476 100%);border:none;border-radius:50px;padding:8px 20px;font-size:1rem;font-weight:700;transition:all .3s;box-shadow:0 4px 6px #0000004d}#btn-ionic:hover{transform:translateY(-2px);box-shadow:0 6px 12px #dd247666}#ionic-bonding-area{top:calc(50% + 35px);left:var(--bond-panel-center,50%);width:var(--bond-panel-width,min(650px, calc(100vw - 24px)));overscroll-behavior:contain;z-index:50;box-sizing:border-box;text-align:center;color:#fff;background-color:#1e1e1ef2;border:2px solid #dd2476;border-radius:12px;flex-direction:column;align-items:center;height:auto;max-height:calc(100dvh - 110px);padding:15px;display:flex;position:fixed;overflow:hidden auto;transform:translate(-50%,-50%);box-shadow:0 10px 40px #0009}#ionic-bonding-area>*{flex-shrink:0}#ionic-bonding-area .close-bonding{color:#888;cursor:pointer;background:0 0;border:none;font-size:24px;position:absolute;top:5px;right:10px}#ionic-bonding-area h3{color:#fff;margin:5px 0 0;font-size:1.5rem}#ionic-instruction{color:#fff;background:#ffffff1a;border-radius:20px;width:auto;max-width:90%;margin:10px 0 20px;padding:8px 20px;font-size:1.2rem;font-weight:700;display:inline-block}#ionic-zone-1,#ionic-zone-2{background:#ffffff0d;border:2px dashed #666;border-radius:10px;justify-content:center;align-items:center;width:90px;height:110px;transition:all .3s;display:flex}.target-active{background:#ffeb3b1a;border-color:#ffeb3b;animation:1.5s infinite glow-pulse}@keyframes glow-pulse{0%{box-shadow:0 0 5px #ffeb3b}50%{box-shadow:0 0 15px #ffeb3b}to{box-shadow:0 0 5px #ffeb3b}}#ionic-bonding-sign{color:gold;font-size:2.5rem}.lewis-stage{justify-content:center;align-items:center;gap:72px;width:100%;height:120px;padding:0 20px;display:flex;position:relative}.ion-bracket-left,.ion-bracket-right{opacity:0;pointer-events:none;border-top:3px solid #fff;border-bottom:3px solid #fff;width:10px;transition:opacity .5s;position:absolute;top:-5px;bottom:-5px}.ion-bracket-left{border-left:3px solid #fff;border-top-left-radius:10px;border-bottom-left-radius:10px;left:-10px}.ion-bracket-right{border-right:3px solid #fff;border-top-right-radius:10px;border-bottom-right-radius:10px;right:-10px}.ion-bracket-left.compact-narrow{left:5px}.ion-bracket-right.compact-narrow{right:5px}.charge-label.compact-narrow{font-size:1.1rem;top:-13px;right:-20px}.ion-bracket-left.compact-wide{left:2px}.ion-bracket-right.compact-wide{right:2px}.charge-label.compact-wide{font-size:1.1rem;top:-13px;right:-21px}.lewis-container{justify-content:center;align-items:center;width:100px;height:100px;display:flex;position:relative}.lewis-symbol{z-index:2;font-size:2rem;font-weight:700;color:#fff!important}.dots-wrapper{pointer-events:none;width:100%;height:100%;position:absolute;top:0;left:0}.lewis-stage .dot{z-index:100;background-color:gold;border-radius:50%;width:12px;height:12px;position:absolute;box-shadow:0 0 4px gold}.lewis-stage .top-1{top:5px;left:calc(50% - 13px)}.lewis-stage .top-2{top:5px;left:calc(50% + 1px)}.lewis-stage .bottom-1{bottom:5px;left:calc(50% - 13px)}.lewis-stage .bottom-2{bottom:5px;left:calc(50% + 1px)}.lewis-stage .left-1{top:calc(50% - 13px);left:5px}.lewis-stage .left-2{top:calc(50% + 1px);left:5px}.lewis-stage .right-1{top:calc(50% - 13px);right:5px}.lewis-stage .right-2{top:calc(50% + 1px);right:5px}.charge-label{z-index:200;opacity:0;background:0 0;border:none;padding:0;font-size:1.3rem;font-weight:700;transition:opacity .3s;animation:.5s pop-in;position:absolute;top:-15px;right:-41px;color:#fff!important}@keyframes pop-in{0%{transform:scale(0)}to{transform:scale(1)}}#ionic-btn-reset{color:#fff;cursor:pointer;background-color:#4caf50;border:none;border-radius:20px;margin-top:15px;padding:8px 25px;font-size:1rem;transition:all .3s;animation:.5s pop-in;box-shadow:0 4px 6px #0000004d}#ionic-btn-reset:hover{background-color:#45a049;transform:scale(1.05)}.element.dimmed{pointer-events:none;position:relative}.element.dimmed:after{content:"";-webkit-backdrop-filter:grayscale();backdrop-filter:grayscale();z-index:20;background-color:#fffc;border-radius:4px;width:100%;height:100%;position:absolute;top:0;left:0}.element.highlight-source,.element.highlight-target{z-index:45;cursor:grab;animation:1.5s infinite guide-border;position:relative;opacity:1!important}@keyframes guide-border{0%{border-color:#0000;box-shadow:0 0 gold}50%{border-color:gold;box-shadow:0 0 15px gold}to{border-color:#0000;box-shadow:0 0 gold}}.element.dragging{transform:scale(.9);opacity:.5!important}@media screen and (width<=1200px){#ionic-bonding-area{-webkit-backdrop-filter:blur(5px);backdrop-filter:blur(5px);background-color:#1e1e1ed9}}@media (width<=1366px) and (orientation:landscape){#ionic-bonding-area{-webkit-overflow-scrolling:touch;touch-action:pan-y;padding:10px}#ionic-bonding-area h3{margin:0;font-size:1.2rem}#ionic-instruction{margin:8px 0 15px;padding:6px 15px;font-size:1rem}.bonding-stage{gap:20px;margin-bottom:15px}#ionic-zone-1,#ionic-zone-2{width:70px;height:90px}.placed-symbol,#ionic-bonding-sign{font-size:2rem}.lewis-stage{gap:30px;height:100px;padding:0 30px}.lewis-container{width:80px;height:80px}.lewis-symbol{font-size:1.5rem}.zone-label{font-size:.9rem}}@media screen and (width<=768px){#ionic-bonding-area{-webkit-overflow-scrolling:touch;touch-action:pan-y;padding:5px}#ionic-bonding-area h3{margin:2px 0;font-size:1rem}#ionic-instruction{margin:5px 0;padding:4px 10px;font-size:.9rem}.bonding-stage{gap:10px;margin-bottom:5px}#ionic-zone-1,#ionic-zone-2{width:60px;height:80px}.lewis-stage{gap:10px;height:100px;padding:0}.lewis-container{width:60px;height:60px}.lewis-symbol{font-size:1.2rem}.zone-label{font-size:.8rem}#ionic-btn-reset{margin-top:5px;padding:5px 15px;font-size:.9rem}}#btn-covalent{cursor:pointer;color:#fff;background:linear-gradient(135deg,#1fa2ff 0%,#12d8fa 100%);border:none;border-radius:50px;padding:8px 20px;font-size:1rem;font-weight:700;transition:all .3s;box-shadow:0 4px 6px #0000004d}#btn-covalent:hover{transform:translateY(-2px);box-shadow:0 6px 12px #12d8fa66}#btn-covalent:disabled{cursor:not-allowed;box-shadow:none;background:#ccc;transform:none}#covalent-bonding-area{top:calc(50% + 35px);left:var(--bond-panel-center,50%);width:var(--bond-panel-width,min(650px, calc(100vw - 24px)));overscroll-behavior:contain;z-index:50;box-sizing:border-box;text-align:center;color:#fff;background-color:#1e1e1ef2;border:2px solid #12d8fa;border-radius:12px;flex-direction:column;align-items:center;height:auto;max-height:calc(100dvh - 110px);padding:10px;display:flex;position:fixed;overflow:hidden auto;transform:translate(-50%,-50%);box-shadow:0 10px 40px #0009}#covalent-bonding-area>*{flex-shrink:0}#covalent-bonding-area>.close-bonding{order:1}#covalent-bonding-area>h3{order:2}#covalent-bonding-area>.covalent-subtitle{order:3}#covalent-bonding-area>#covalent-instruction{order:4}#covalent-bonding-area>.bonding-stage{order:5}#covalent-bonding-area>.covalent-demo-row{box-sizing:border-box;order:6;align-items:flex-start;gap:12px;width:100%;margin-top:10px;padding:0 15px;display:flex}.covalent-demo-left{flex-direction:column;flex:1 0 310px;display:flex}#covalent-bonding-area .lewis-stage{flex-shrink:0;gap:20px;height:240px;margin-top:0}#covalent-options{order:5;margin-top:15px}#covalent-step-controls{order:9;margin-top:-10px}#covalent-bonding-area .close-bonding{color:#888;cursor:pointer;background:0 0;border:none;font-size:24px;position:absolute;top:5px;right:10px}#covalent-bonding-area h3{color:#fff;margin:5px 0 0;font-size:1.5rem}#covalent-instruction{color:#fff;background:#ffffff1a;border-radius:20px;width:auto;max-width:90%;margin:10px 0 20px;padding:8px 20px;font-size:1.2rem;font-weight:700;display:inline-block}.bonding-stage{justify-content:center;align-items:center;gap:30px;margin-bottom:20px;display:flex}.drop-zone-container{flex-direction:column;align-items:center;gap:5px;display:flex}#covalent-zone-1,#covalent-zone-2{background:#ffffff0d;border:2px dashed #666;border-radius:10px;justify-content:center;align-items:center;width:90px;height:110px;transition:all .3s;display:flex}.placed-symbol{text-shadow:0 0 5px #00000080;font-size:2.5rem;font-weight:700;color:#fff!important}.target-active{background:#12d8fa1a;animation:1.5s infinite glow-pulse-blue;border-color:#12d8fa!important}@keyframes glow-pulse-blue{0%{box-shadow:0 0 5px #12d8fa80}50%{box-shadow:0 0 15px #12d8facc}to{box-shadow:0 0 5px #12d8fa80}}.highlight-source{z-index:10;transform:scale(1.1);border-color:gold!important;box-shadow:0 0 15px gold!important}.highlight-target{z-index:10;transform:scale(1.1);border-color:#12d8fa!important;box-shadow:0 0 15px #12d8fa!important}.dimmed{opacity:.2;pointer-events:none;filter:grayscale()}.operator-sign{color:#12d8fa;font-size:2.5rem}.zone-label{color:#12d8fa;margin-top:5px;font-size:1rem;font-weight:700}.compound-select-btn{color:#000;cursor:pointer;background:#12d8fa;border:none;border-radius:5px;padding:10px 20px;font-size:1.1rem;font-weight:700;transition:transform .2s}.compound-select-btn:hover{background:#fff;transform:scale(1.1)}.atom-container{justify-content:center;align-items:center;width:60px;height:60px;display:flex;position:absolute}.atom-symbol{color:#fff;z-index:2;font-size:2rem;font-weight:700}.electron-layer{pointer-events:none;width:100%;height:100%;position:absolute;top:0;left:0}.dot{background-color:gold;border-radius:50%;width:8px;height:8px;transition:all 1s ease-in-out;position:absolute;box-shadow:0 0 5px gold}.center-atom{top:50%;left:50%;transform:translate(-50%,-50%)}.position-left{top:50%;left:calc(50% - 80px);transform:translate(-50%,-50%)}.position-right{top:50%;left:calc(50% + 80px);transform:translate(-50%,-50%)}.position-top{top:calc(50% - 80px);left:50%;transform:translate(-50%,-50%)}.position-bottom{top:calc(50% + 80px);left:50%;transform:translate(-50%,-50%)}.left-center{left:calc(50% - 40px)!important}.right-center{left:calc(50% + 40px)!important}.c1-pos-0{transform:translate(-50%,-50%);top:50%!important;left:calc(50% - 120px)!important}.c1-pos-1{transform:translate(-50%,-50%);top:calc(50% - 80px)!important;left:calc(50% - 40px)!important}.c1-pos-2{transform:translate(-50%,-50%);top:calc(50% + 80px)!important;left:calc(50% - 40px)!important}.c2-pos-0{transform:translate(-50%,-50%);top:50%!important;left:calc(50% + 120px)!important}.c2-pos-1{transform:translate(-50%,-50%);top:calc(50% - 80px)!important;left:calc(50% + 40px)!important}.c2-pos-2{transform:translate(-50%,-50%);top:calc(50% + 80px)!important;left:calc(50% + 40px)!important}#covalent-btn-reset{color:#fff;cursor:pointer;background-color:#4caf50;border:none;border-radius:20px;margin-top:5px;padding:8px 25px;font-size:1rem;animation:.5s pop-in;box-shadow:0 4px 6px #0000004d}.legend-icon{vertical-align:middle;margin-left:5px;margin-right:5px;display:inline-block}.legend-bond{background-color:#12d8fa;border-radius:2px;width:25px;height:4px;box-shadow:0 0 5px #12d8fa}.legend-dot-pair{justify-content:center;gap:4px;width:20px;height:10px;display:inline-flex;position:relative}.legend-dot{background-color:gold;border-radius:50%;width:8px;height:8px;display:inline-block;box-shadow:0 0 5px gold}.bond-line{transform-origin:0 0;z-index:1;background-color:#12d8fa;height:3px;position:absolute;box-shadow:0 0 5px #12d8fa}.double-bond{border-top:2px solid #12d8fa;border-bottom:2px solid #12d8fa;height:8px!important;box-shadow:none!important;background:0 0!important}.triple-bond{border-top:2px solid #12d8fa;border-bottom:2px solid #12d8fa;height:10px!important;box-shadow:none!important;background:linear-gradient(#0000 35%,#12d8fa 35% 65%,#0000 65%)!important}.covalent-simulation-info{z-index:20;pointer-events:none;flex-direction:column;flex:0 280px;align-items:stretch;gap:10px;min-width:220px;margin-top:0;display:none;position:relative}.covalent-formula-label{color:#fff;text-shadow:0 0 10px #000c;white-space:nowrap;text-align:center;align-self:center;font-size:3rem;font-weight:700}.covalent-sim-instruction{color:#fff;text-align:left;box-sizing:border-box;background:#0006;border-radius:10px;width:100%;padding:10px 15px;font-size:1.15rem;line-height:1.5}@media (width<=1300px){#covalent-bonding-area>.covalent-demo-row{flex-direction:column;align-items:stretch}.covalent-simulation-info{flex:none;width:100%;min-width:0}#covalent-bonding-area{-webkit-backdrop-filter:blur(5px);backdrop-filter:blur(5px);background-color:#1e1e1ed9}.covalent-formula-label{font-size:1.8rem}}.cov-step-line{opacity:.55;margin:4px 0;font-size:.95em}.cov-step-line.current{opacity:1;font-size:1em}@media (width<=1366px) and (orientation:landscape){#covalent-bonding-area{-webkit-overflow-scrolling:touch;touch-action:pan-y;padding:10px}#covalent-bonding-area h3{margin:0;font-size:1.2rem}.covalent-subtitle{margin:2px 0 5px;font-size:.95rem}#covalent-instruction{margin:8px 0 15px;padding:6px 15px;font-size:1rem}.bonding-stage{gap:20px;margin-bottom:15px}#covalent-zone-1,#covalent-zone-2{width:70px;height:90px}.placed-symbol,#covalent-bonding-sign{font-size:2rem}.covalent-formula-label{font-size:1.5rem}}.lewis-stage{width:100%;position:relative}@media screen and (width<=768px){#covalent-bonding-area{-webkit-overflow-scrolling:touch;touch-action:pan-y;padding:5px}#covalent-bonding-area h3{margin:2px 0;font-size:1rem}#covalent-instruction{margin:5px 0;padding:4px 10px;font-size:.9rem}.bonding-stage{gap:10px;margin-bottom:5px}#covalent-zone-1,#covalent-zone-2{width:60px;height:80px}.placed-symbol{font-size:2rem}.covalent-formula-label{font-size:1.2rem}#covalent-btn-reset{margin-top:-5px;padding:5px 15px;font-size:.9rem}}.covalent-subtitle{color:#eee;margin:5px 0 10px;font-size:1rem;font-weight:400}.covalent-mode-switch{background:#ffffff14;border-radius:20px;justify-content:center;gap:6px;padding:3px;display:flex}.cov-mode-btn{color:#cfd8dc;cursor:pointer;background:0 0;border:none;border-radius:16px;padding:5px 14px;font-family:inherit;font-size:.95rem;transition:background .2s,color .2s}.cov-mode-btn:hover{color:#fff;background:#ffffff1f}.cov-mode-btn.active{color:#06232b;background:#12d8fa;font-weight:700}.cov-mode-btn:focus-visible{outline-offset:2px;outline:2px solid #fc0}#covalent-bonding-area.g1-mode>.covalent-demo-row{flex-direction:column;align-items:stretch}#covalent-bonding-area.g1-mode .covalent-simulation-info{flex:none;width:100%;min-width:0}.covalent-g1-stage{flex-shrink:0;justify-content:center;align-items:center;width:100%;min-height:230px;display:flex}.bond-line.g1-shared-pair,.bond-line.g1-shared-pair.double-bond,.bond-line.g1-shared-pair.triple-bond{box-shadow:none!important;background:0 0!important;border-top-color:#0000!important;border-bottom-color:#0000!important}.covalent-g1-blocked{color:#fff;text-align:center;background:#ffffff14;border:1px solid #ffffff40;border-radius:10px;order:7;width:100%;max-width:460px;margin:10px auto 0;padding:12px 16px;font-size:.95rem;line-height:1.6}.covalent-g1-blocked p{margin:0 0 10px}.g1-switch-btn{color:#06232b;cursor:pointer;background:#12d8fa;border:none;border-radius:18px;padding:7px 18px;font-family:inherit;font-size:.95rem;font-weight:700}.g1-switch-btn:hover{background:#fff}.bond-line.g1-bond-host{overflow:visible}.g1-shared-dot{z-index:3;pointer-events:none;border-radius:50%;width:13px;height:13px;position:absolute;top:50%;left:50%;transform:translate(-50%,-50%)}@media (width>=1024px){#covalent-bonding-area.g1-mode.g1-wide{left:var(--bond-panel-left,50%);width:min(calc(var(--bond-panel-width,650px) + 320px), calc(100vw - var(--bond-panel-left,0px) - 16px));transform:translateY(-50%)}#covalent-bonding-area.g1-mode.g1-wide:not([style*=--]){max-width:calc(100vw - 24px)}#covalent-bonding-area.g1-mode.g1-wide>.covalent-demo-row{flex-direction:row;align-items:flex-start;gap:10px;padding:0 10px}#covalent-bonding-area.g1-mode.g1-wide .covalent-demo-left{flex:0 400px}#covalent-bonding-area.g1-mode.g1-wide .covalent-simulation-info{flex:380px;width:auto;min-width:300px}}