*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--bg);color:var(--ink);font-family:Inter,ui-sans-serif,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;transition:.25s;background-color:.25s;color:.25s}.app-shell{min-height:100vh}.sidebar{position:fixed;inset:0 auto 0 0;width:250px;background:var(--nav);color:var(--navInk);padding:28px 18px;display:flex;flex-direction:column;z-index:20}.brand{display:flex;align-items:center;gap:12px;padding:0 8px 24px}.brand strong{display:block;font-size:17px;letter-spacing:.2px}.brand small{display:block;color:#7f94a7;font-size:13px;margin-top:1px}.brand-mark{width:38px;height:38px;border:1px solid #395165;border-radius:12px;position:relative;background:#122435}.brand-mark span,.brand-mark i,.brand-mark b{position:absolute;border-radius:50%;background:#41c7c5}.brand-mark span{width:6px;height:6px;left:8px;top:16px}.brand-mark i{width:6px;height:6px;right:8px;top:8px}.brand-mark b{width:6px;height:6px;right:8px;bottom:8px}.brand-mark:after,.brand-mark:before{content:"";position:absolute;height:1px;background:#41c7c5;transform-origin:left center;left:12px;width:18px}.brand-mark:after{top:18px;transform:rotate(-28deg)}.brand-mark:before{top:20px;transform:rotate(28deg)}nav{display:flex;flex-direction:column;gap:5px}.nav-item,.ghost-btn{appearance:none;border:0;background:transparent;color:inherit;text-align:left;padding:12px 13px;border-radius:12px;font-weight:650;font-size:14px;cursor:pointer;display:flex;align-items:center;gap:11px}.nav-item span{width:23px;text-align:center;color:#86a0b5;font-size:16px}.nav-item:hover,.nav-item.active{background:#17293a;color:#fff}.nav-item.active span{color:#50d0ce}.sidebar-foot{margin-top:auto}.ghost-btn{width:100%;border:1px solid #263c4d;margin-bottom:18px}.developer{font-size:11px;line-height:1.5;color:#70889b;padding:0 8px}.developer strong{color:#a9bbc9;font-weight:650}main{margin-left:250px;padding:0 34px 26px;max-width:1600px}.topbar{height:104px;display:flex;align-items:center;gap:16px}.topbar h1{font-size:22px;margin:0 0 4px;letter-spacing:-.3px}.topbar p{margin:0;color:var(--muted);font-size:13px}.status-pill{margin-left:auto;font-size:12px;color:var(--muted);background:var(--surface);padding:9px 13px;border:1px solid var(--line);border-radius:999px}.status-pill span{display:inline-block;width:7px;height:7px;background:#37b46e;border-radius:50%;margin-right:6px}.view{display:none;animation:fade .25s ease}.view.active{display:block}@keyframes fade{from{opacity:.2;transform:translateY(6px)}to{opacity:1;transform:none}}.card{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow)}.hero{min-height:330px;padding:46px;display:grid;grid-template-columns:1.15fr .85fr;align-items:center;overflow:hidden;position:relative}.eyebrow{font-size:11px;font-weight:800;letter-spacing:1.7px;color:var(--accent);display:block;margin-bottom:10px}.hero h2{font-size:44px;line-height:1.02;letter-spacing:-1.8px;margin:0 0 18px;max-width:660px}.hero p{font-size:16px;line-height:1.65;color:var(--muted);max-width:620px;margin:0}.hero-actions{display:flex;gap:10px;margin-top:28px}.primary,.secondary{border:0;border-radius:12px;padding:13px 18px;font-weight:750;font-size:14px;cursor:pointer;transition:.18s}.primary{background:var(--accent);color:white}.primary:hover{filter:brightness(1.08);transform:translateY(-1px)}.secondary{background:var(--surface2);color:var(--ink);border:1px solid var(--line)}.secondary:hover{border-color:var(--accent)}.wide{width:100%}.top-gap{margin-top:10px}.hero-visual{padding:30px}.scope-grid{height:230px;border-radius:22px;background:linear-gradient(145deg,#0e2430,#112f39);position:relative;overflow:hidden;background-image:linear-gradient(rgba(100,210,211,.08) 1px,transparent 1px),linear-gradient(90deg,rgba(100,210,211,.08) 1px,transparent 1px);background-size:24px 24px}.scope-grid svg{position:absolute;inset:25px;width:calc(100% - 50px);height:calc(100% - 50px)}.scope-grid path{fill:none;stroke:#50d0ce;stroke-width:4;filter:drop-shadow(0 0 8px rgba(80,208,206,.4))}.scope-dot{width:8px;height:8px;border-radius:50%;background:#b9fffa;position:absolute;left:52%;top:45%;box-shadow:0 0 18px #50d0ce}.tool-grid{display:grid;grid-template-columns:repeat(5,1fr);gap:14px;margin-top:16px}.tool-card{border:1px solid var(--line);background:var(--surface);color:var(--ink);border-radius:18px;padding:22px;text-align:left;cursor:pointer;min-height:190px;transition:.2s}.tool-card:hover{transform:translateY(-3px);box-shadow:var(--shadow);border-color:#adc5cf}.tool-card.featured{background:linear-gradient(145deg,var(--surface),var(--accent-soft))}.tool-icon{display:grid;place-items:center;width:38px;height:38px;background:var(--accent-soft);color:var(--accent);border-radius:11px;font-weight:800;margin-bottom:24px}.tool-card h3{margin:0 0 9px;font-size:16px}.tool-card p{color:var(--muted);font-size:13px;line-height:1.5;margin:0 0 18px}.tool-card em{font-style:normal;font-size:12px;font-weight:800;color:var(--accent)}.workspace{display:grid;gap:18px}.two-col{grid-template-columns:minmax(330px,.8fr) minmax(420px,1.2fr)}.panel,.result-panel{padding:28px}.section-head{display:flex;justify-content:space-between;align-items:flex-start;gap:20px;margin-bottom:25px}.section-head h2,.panel h2,.schmitt-intro h2{margin:0;font-size:25px;letter-spacing:-.5px}.formula-chip{font-family:ui-monospace,SFMono-Regular,Menlo,monospace;font-size:12px;padding:8px 10px;background:var(--accent-soft);color:var(--accent);border-radius:9px;white-space:nowrap}.segmented{display:grid;grid-auto-flow:column;grid-auto-columns:1fr;background:var(--surface2);padding:4px;border-radius:12px;border:1px solid var(--line);margin:8px 0 20px}.segmented button{border:0;background:transparent;color:var(--muted);padding:9px 10px;border-radius:9px;font-weight:700;cursor:pointer}.segmented button.active{background:var(--surface);color:var(--ink);box-shadow:0 2px 8px rgba(20,40,60,.07)}label{font-size:12px;font-weight:750;color:var(--muted)}.field{margin-bottom:15px}.field label{display:block;margin-bottom:7px}.field input,.field select{width:100%;border:1px solid var(--line);background:var(--surface2);color:var(--ink);border-radius:11px;padding:12px 13px;font-size:15px;outline:none}.field input:focus{border-color:var(--accent);box-shadow:0 0 0 3px color-mix(in srgb,var(--accent) 13%,transparent)}.form-grid{display:grid;grid-template-columns:1fr 1fr;gap:12px}.hint,.mini-copy{font-size:12px;line-height:1.55;color:var(--muted)}.hint{margin-top:12px}.result-panel{min-height:410px}.empty-state{height:100%;min-height:340px;display:grid;place-items:center;align-content:center;text-align:center;color:var(--muted)}.empty-state span{font-size:34px;color:var(--accent);background:var(--accent-soft);width:64px;height:64px;border-radius:20px;display:grid;place-items:center;margin-bottom:12px}.empty-state h3{color:var(--ink);margin:0 0 7px}.empty-state p{margin:0;font-size:13px}.result-hero{padding:24px;background:var(--accent-soft);border-radius:17px;margin-bottom:18px}.result-hero small{font-size:11px;color:var(--accent);font-weight:800;letter-spacing:1px}.result-hero strong{display:block;font-size:36px;margin-top:6px;letter-spacing:-1px}.metric-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:10px}.metric{border:1px solid var(--line);border-radius:13px;padding:14px;background:var(--surface2)}.metric small{display:block;color:var(--muted);font-size:11px;margin-bottom:6px}.metric strong{font-size:15px}.calc-box{margin-top:16px;border-top:1px solid var(--line);padding-top:15px;font-family:ui-monospace,SFMono-Regular,Menlo,monospace;font-size:12px;line-height:1.75;color:var(--muted)}.result-actions{display:flex;gap:8px;margin-top:16px}.mini-btn{border:1px solid var(--line);background:var(--surface2);color:var(--ink);border-radius:9px;padding:8px 10px;font-size:11px;font-weight:750;cursor:pointer}.chart{margin-top:16px;border:1px solid var(--line);border-radius:14px;padding:10px;background:var(--surface2)}.chart svg{width:100%;height:170px}.chart .axis{stroke:var(--line);stroke-width:1}.chart .curve{stroke:var(--accent);stroke-width:3;fill:none}.chart text{fill:var(--muted);font-size:9px}.res-row{display:grid;grid-template-columns:34px 1fr 34px;gap:8px;align-items:center;margin-bottom:8px}.res-row .index{font-size:12px;color:var(--muted);text-align:center}.res-row input{border:1px solid var(--line);background:var(--surface2);color:var(--ink);border-radius:10px;padding:11px}.delete-btn{border:0;background:transparent;color:var(--muted);cursor:pointer;font-size:18px}.branch{border:1px solid var(--line);border-radius:14px;padding:12px;margin-bottom:10px;background:var(--surface2)}.branch-head{display:flex;justify-content:space-between;align-items:center;margin-bottom:8px;font-size:12px;font-weight:800}.branch .res-row input{background:var(--surface)}.branch-controls{display:flex;gap:7px;margin-top:8px}.divider{display:flex;align-items:center;gap:10px;margin:24px 0 15px;color:var(--muted);font-size:10px;font-weight:800;letter-spacing:1.2px}.divider:before,.divider:after{content:"";height:1px;background:var(--line);flex:1}.bits{font-family:ui-monospace,SFMono-Regular,Menlo,monospace;font-size:22px;letter-spacing:2px;word-break:break-all;line-height:1.55}.bit-group{padding:3px 6px;border-radius:7px;background:var(--surface2);margin:2px;display:inline-block}.schmitt-intro{padding:25px 28px;margin-bottom:18px;display:flex;justify-content:space-between;align-items:center}.schmitt-intro p{margin:7px 0 0;color:var(--muted);font-size:13px}.schmitt-layout{grid-template-columns:minmax(390px,.85fr) minmax(520px,1.15fr)}.panel h3{font-size:15px;margin:0 0 16px}.subhead{padding-top:20px;border-top:1px solid var(--line);margin-top:12px!important}.threshold-row{display:grid;grid-template-columns:40px 1fr 1fr;gap:8px;align-items:end;margin-bottom:8px}.threshold-row strong{font-size:12px;padding-bottom:14px;color:var(--muted)}.logic-row{display:grid;grid-template-columns:50px 1fr;gap:8px;align-items:center;margin-bottom:7px}.logic-row span{font-size:12px;color:var(--muted)}.logic-row input{font-family:ui-monospace,monospace;letter-spacing:4px}.table-wrap{overflow:auto;border:1px solid var(--line);border-radius:13px;margin-top:14px}table{width:100%;border-collapse:collapse;font-size:11px;white-space:nowrap}th,td{padding:10px 11px;border-bottom:1px solid var(--line);text-align:right}th:first-child,td:first-child{text-align:left}th{color:var(--muted);font-weight:800;background:var(--surface2)}tr:last-child td{border-bottom:0}.ok{color:#2f9b65}.warn{color:#bd7c20}.bad{color:var(--danger)}.quick-grid{display:grid;grid-template-columns:1fr 1fr;gap:18px}.inline-result{margin-top:16px}.inline-result .result-hero{margin:0}.icon-btn{border:1px solid var(--line);background:var(--surface);color:var(--ink);border-radius:10px;width:40px;height:40px}.mobile-only{display:none}footer{padding:30px 5px 8px;color:var(--muted);font-size:10px;text-align:center}#toast{position:fixed;right:24px;bottom:24px;background:#122333;color:#fff;padding:12px 15px;border-radius:11px;font-size:12px;opacity:0;transform:translateY(10px);pointer-events:none;transition:.2s;z-index:99}#toast.show{opacity:1;transform:none}.error-box{padding:14px;border:1px solid color-mix(in srgb,var(--danger) 45%,var(--line));background:color-mix(in srgb,var(--danger) 8%,var(--surface));border-radius:12px;color:var(--danger);font-size:12px;line-height:1.5}.ladder{margin-top:14px;padding:14px;border:1px solid var(--line);border-radius:13px;background:var(--surface2)}.ladder-row{display:flex;align-items:center;gap:10px;font-size:11px;margin:7px 0}.ladder-line{width:36px;height:3px;background:var(--accent);border-radius:3px}
@media(max-width:1200px){.tool-grid{grid-template-columns:repeat(3,1fr)}.hero h2{font-size:38px}.schmitt-layout{grid-template-columns:1fr}.two-col{grid-template-columns:1fr}}
@media(max-width:800px){.sidebar{transform:translateX(-100%);transition:.2s;width:270px}.sidebar.open{transform:none}.mobile-only{display:block}.app-shell:has(.sidebar.open):after{content:"";position:fixed;inset:0;background:rgba(0,0,0,.35);z-index:10}main{margin-left:0;padding:0 16px 20px}.topbar{height:86px}.status-pill{display:none}.hero{grid-template-columns:1fr;padding:28px;min-height:auto}.hero h2{font-size:34px}.hero-visual{padding:26px 0 0}.scope-grid{height:170px}.tool-grid{grid-template-columns:1fr 1fr}.tool-card{min-height:170px}.quick-grid{grid-template-columns:1fr}.schmitt-intro{align-items:flex-start;gap:15px}.schmitt-intro .formula-chip{display:none}}
@media(max-width:520px){.tool-grid{grid-template-columns:1fr}.hero-actions{flex-direction:column}.form-grid{grid-template-columns:1fr}.metric-grid{grid-template-columns:1fr}.panel,.result-panel{padding:20px}.threshold-row{grid-template-columns:34px 1fr 1fr}.topbar h1{font-size:19px}.hero h2{font-size:30px}.hero p{font-size:14px}.schmitt-intro{padding:21px}.result-hero strong{font-size:30px}}
/* V2 navigation, history workspace and filter tools */
.home-btn{display:none;flex:0 0 auto;font-size:19px;font-weight:800;cursor:pointer}.home-btn.visible{display:grid;place-items:center}.lang-btn{border:1px solid var(--line);background:var(--surface);color:var(--ink);border-radius:10px;height:40px;min-width:48px;padding:0 10px;font-size:11px;font-weight:850;letter-spacing:.8px;cursor:pointer}.top-actions{margin-left:auto;display:flex;align-items:center;gap:8px}.status-pill{margin-left:0}.save-calc:hover{filter:brightness(1.06)}
.filter-layout{display:grid;grid-template-columns:minmax(340px,.82fr) minmax(430px,1.18fr);gap:18px}.filter-result{min-height:460px}.bode-labels{display:flex;justify-content:space-between;color:var(--muted);font-size:10px;margin-top:5px}.filter-note{padding:12px 14px;border-radius:12px;background:var(--surface2);border:1px solid var(--line);font-size:12px;color:var(--muted);line-height:1.55}.design-row{display:grid;grid-template-columns:1fr 1fr;gap:9px}.design-box{border:1px solid var(--line);border-radius:14px;padding:14px;background:var(--surface2);margin-top:14px}.design-box h3{margin:0 0 12px;font-size:13px}
.history-orb{position:fixed;z-index:120;width:62px;height:62px;border-radius:50%;border:2px solid rgba(255,255,255,.8);padding:0;background:linear-gradient(145deg,#0d1826,#18394a);box-shadow:0 15px 38px rgba(10,30,45,.26),0 0 0 5px color-mix(in srgb,var(--accent) 12%,transparent);display:none;place-items:center;touch-action:none;user-select:none;-webkit-user-select:none;cursor:grab;overflow:hidden}.history-orb.visible{display:grid}.history-orb:active{cursor:grabbing}.history-orb img{width:100%;height:100%;object-fit:cover;border-radius:50%;pointer-events:none}.history-orb .history-count{position:absolute;right:-1px;top:-1px;min-width:20px;height:20px;border-radius:12px;padding:0 5px;background:var(--danger);color:white;border:2px solid var(--surface);font-size:10px;font-weight:900;display:grid;place-items:center}
.history-panel{position:fixed;z-index:115;right:18px;top:92px;bottom:18px;width:min(650px,calc(100vw - 36px));background:color-mix(in srgb,var(--surface) 96%,transparent);backdrop-filter:blur(24px);-webkit-backdrop-filter:blur(24px);border:1px solid var(--line);border-radius:26px;box-shadow:0 34px 90px rgba(5,22,34,.28);transform:translateX(calc(100% + 40px)) scale(.96);transform-origin:100% 40%;opacity:0;pointer-events:none;transition:transform .28s cubic-bezier(.2,.8,.2,1),opacity .2s;display:flex;flex-direction:column;overflow:hidden}.history-panel.open{transform:translateX(0) scale(1);opacity:1;pointer-events:auto}.history-head{padding:20px 20px 15px;display:flex;gap:12px;align-items:center;border-bottom:1px solid var(--line);background:linear-gradient(145deg,var(--surface),var(--accent-soft))}.history-head-logo{width:44px;height:44px;border-radius:50%;overflow:hidden;flex:none;background:var(--nav)}.history-head-logo img{width:100%;height:100%}.history-head h2{font-size:19px;margin:0}.history-head p{font-size:11px;color:var(--muted);margin:3px 0 0}.history-head .history-close{margin-left:auto}.history-toolbar{padding:10px 16px;border-bottom:1px solid var(--line);display:flex;align-items:center;gap:8px}.history-toolbar input{flex:1;min-width:0;border:1px solid var(--line);border-radius:11px;padding:10px 12px;background:var(--surface2);color:var(--ink)}.history-scroll{overflow:auto;padding:14px 15px 90px;-webkit-overflow-scrolling:touch}.history-empty{padding:60px 20px;text-align:center;color:var(--muted)}.history-group{border:1px solid var(--line);border-radius:17px;background:var(--surface);margin-bottom:11px;overflow:hidden}.history-group-head{width:100%;border:0;background:transparent;color:var(--ink);padding:15px 16px;display:flex;align-items:center;gap:12px;text-align:left;cursor:pointer}.history-group-icon{width:34px;height:34px;border-radius:10px;background:var(--accent-soft);color:var(--accent);display:grid;place-items:center;font-weight:900}.history-group-head strong{font-size:14px}.history-group-head small{display:block;color:var(--muted);font-size:10px;margin-top:2px}.history-group-head .chev{margin-left:auto;transition:.2s}.history-group.open .chev{transform:rotate(180deg)}.history-items{display:none;padding:0 10px 10px}.history-group.open .history-items{display:block}.history-entry{border-top:1px solid var(--line);padding:13px 6px}.history-entry:first-child{border-top:0}.history-entry-top{display:flex;justify-content:space-between;gap:10px;align-items:flex-start}.history-entry-top strong{font-size:12px}.history-time{font-size:9px;color:var(--muted);white-space:nowrap}.history-summary{font-size:12px;line-height:1.55;color:var(--muted);margin:8px 0}.history-edit-grid{display:grid;grid-template-columns:1fr 1fr;gap:7px}.history-edit-grid .field{margin:0}.history-edit-grid label{font-size:9px}.history-edit-grid input,.history-edit-grid textarea,.history-edit-grid select{width:100%;border:1px solid var(--line);background:var(--surface2);color:var(--ink);border-radius:9px;padding:9px;font-size:12px}.history-edit-grid textarea{grid-column:1/-1;min-height:64px;resize:vertical}.history-entry-actions{display:flex;gap:6px;flex-wrap:wrap;margin-top:9px}.danger-mini{color:var(--danger)!important}.history-live-result{margin-top:8px;background:var(--accent-soft);border-radius:10px;padding:10px 11px;font-size:12px;font-weight:750;color:var(--ink)}
@media(max-width:1200px){.filter-layout{grid-template-columns:1fr}}
@media(max-width:800px){.top-actions{margin-left:auto}.topbar{gap:9px}.lang-btn{height:38px;min-width:42px}.history-panel{right:8px;left:8px;top:78px;bottom:8px;width:auto;border-radius:22px}.history-orb{width:58px;height:58px}.history-edit-grid{grid-template-columns:1fr 1fr}}
@media(max-width:520px){.history-edit-grid{grid-template-columns:1fr}.history-edit-grid textarea{grid-column:auto}.design-row{grid-template-columns:1fr}.topbar>div:nth-of-type(1){min-width:0}.topbar p{white-space:nowrap;overflow:hidden;text-overflow:ellipsis;max-width:47vw}}
.info-trigger{cursor:pointer;display:inline-flex!important;align-items:center;gap:8px;user-select:none}.info-trigger:after{content:"ⓘ";font-size:15px;color:var(--accent);font-weight:700}.info-trigger:focus{outline:3px solid color-mix(in srgb,var(--accent) 18%,transparent);outline-offset:4px;border-radius:6px}.knowledge-panel{display:none;margin:0 0 20px;padding:18px 20px;border:1px solid var(--line);border-radius:16px;background:linear-gradient(145deg,var(--surface2),var(--accent-soft));box-shadow:0 8px 22px rgba(20,40,60,.05)}.knowledge-panel.open{display:block;animation:fade .2s ease}.knowledge-panel h4{margin:0 0 8px;font-size:15px}.knowledge-panel p{font-size:12px;line-height:1.6;color:var(--muted);margin:7px 0}.formula-list{display:grid;gap:8px;margin-top:12px}.formula-row{display:grid;grid-template-columns:minmax(120px,.7fr) 1.3fr;gap:10px;align-items:start;padding:10px 12px;border:1px solid var(--line);border-radius:11px;background:var(--surface)}.formula-row code{color:var(--accent);font-weight:800;font-size:12px;white-space:normal}.formula-row span{font-size:11px;line-height:1.5;color:var(--muted)}.diagnostic-card{padding:18px;border:1px solid color-mix(in srgb,var(--danger) 38%,var(--line));border-radius:16px;background:color-mix(in srgb,var(--danger) 6%,var(--surface));}.diagnostic-title{display:flex;gap:12px;align-items:flex-start;margin-bottom:12px}.diagnostic-title>span{width:32px;height:32px;border-radius:50%;display:grid;place-items:center;background:color-mix(in srgb,var(--danger) 14%,transparent);color:var(--danger);font-weight:900}.diagnostic-title strong{font-size:16px}.diagnostic-title p,.diagnostic-item p{margin:4px 0 0;color:var(--muted);font-size:12px;line-height:1.55}.diagnostic-item{padding:12px 0;border-top:1px solid var(--line)}.diagnostic-item strong{font-size:13px}.diagnostic-fix{margin-top:8px;padding:9px 10px;border-radius:9px;background:var(--surface);font-size:11px;line-height:1.5}.diagnostic-item code{display:block;margin-top:7px;font-size:11px;color:var(--accent)}.save-calc{background:var(--accent)!important;color:#fff!important;border-color:var(--accent)!important}.history-orb.visible{animation:orbPop .28s ease}@keyframes orbPop{from{transform:scale(.55);opacity:.2}to{transform:scale(1);opacity:1}}@media(max-width:600px){.formula-row{grid-template-columns:1fr}.knowledge-panel{padding:15px}}
.quick-launcher{margin-top:16px;padding:16px 18px;display:flex;align-items:center;justify-content:space-between;gap:16px}.quick-launcher strong{display:block;font-size:15px}.quick-launcher small{display:block;color:var(--muted);font-size:11px;margin-top:3px}.quick-launch-actions,.quick-hub-actions{display:flex;gap:8px;flex-wrap:wrap}.quick-hub{padding:20px 22px;margin-bottom:18px;display:flex;align-items:center;justify-content:space-between;gap:16px}.quick-hub h2{margin:0;font-size:20px}.quick-hub p{margin:5px 0 0}.field-control{display:flex;align-items:center;gap:8px}.field-control>input,.field-control>select{flex:1;min-width:0}.field-help{flex:0 0 30px;width:30px;height:30px;border-radius:50%;border:1px solid var(--line);background:var(--surface);color:var(--accent);font-weight:900;font-size:14px;display:grid;place-items:center;cursor:pointer}.field-help:hover,.field-help:focus{border-color:var(--accent);outline:none;box-shadow:0 0 0 3px color-mix(in srgb,var(--accent) 12%,transparent)}.field-popover{position:fixed;z-index:210;width:min(340px,calc(100vw - 28px));padding:14px 15px;border-radius:14px;border:1px solid var(--line);background:var(--surface);box-shadow:0 22px 55px rgba(5,22,34,.24);font-size:12px;line-height:1.55;color:var(--muted)}.field-popover strong{display:block;color:var(--ink);margin-bottom:5px}.field-popover b{color:var(--accent)}.res-row{grid-template-columns:34px 1fr 34px}.threshold-row .field-control,.logic-row .field-control{width:100%}.orb-delete-target{position:fixed;z-index:130;left:50%;bottom:max(24px,calc(env(safe-area-inset-bottom) + 18px));transform:translate(-50%,28px) scale(.8);width:70px;height:70px;border-radius:50%;border:2px solid color-mix(in srgb,var(--danger) 70%,white);background:color-mix(in srgb,var(--danger) 88%,#111);color:white;display:grid;place-items:center;font-size:32px;font-weight:300;opacity:0;pointer-events:none;transition:.18s;box-shadow:0 16px 40px rgba(120,20,30,.28)}.orb-delete-target.show{opacity:1;transform:translate(-50%,0) scale(1)}.orb-delete-target.hot{transform:translate(-50%,0) scale(1.12);box-shadow:0 0 0 10px color-mix(in srgb,var(--danger) 14%,transparent),0 16px 40px rgba(120,20,30,.34)}
@media(max-width:800px){.quick-launcher,.quick-hub{align-items:flex-start;flex-direction:column}.quick-launch-actions,.quick-hub-actions{width:100%}.quick-launch-actions .mini-btn,.quick-hub-actions .mini-btn{flex:1 1 calc(50% - 8px)}}
/* v6 advanced interaction */
.optional-rails{margin-top:16px;padding-top:16px;border-top:1px solid var(--line)}.field label small{font-weight:500;opacity:.75}.suggested-value{border-color:color-mix(in srgb,var(--accent) 55%,var(--line))!important;background:color-mix(in srgb,var(--accent-soft) 45%,var(--surface2))!important}.suggestion-note{font-size:10px;color:var(--accent);font-weight:750;margin-top:5px}.chart{touch-action:none}.chart svg{touch-action:none;user-select:none}.chart-cursor{cursor:ew-resize}.cursor-v,.cursor-h{stroke:var(--accent2);stroke-width:1.4;stroke-dasharray:4 3}.cursor-dot{fill:var(--surface);stroke:var(--accent2);stroke-width:3}.cursor-label rect{fill:var(--nav);opacity:.94}.cursor-label text{fill:#fff!important;font-size:9px}.chart-readout{font-size:10px;color:var(--muted);padding:5px 4px 0}.state-chip{display:inline-flex;align-items:center;gap:5px;margin-top:8px;padding:5px 8px;border-radius:999px;background:var(--accent-soft);color:var(--accent);font-size:10px;font-weight:750}.complex-value{font-family:ui-monospace,SFMono-Regular,Menlo,monospace}.warning-strip{margin-top:14px;padding:11px 12px;border-radius:10px;background:#fff4df;color:#805b17;border:1px solid #eed49e;font-size:12px;line-height:1.45}.ok-strip{margin-top:14px;padding:11px 12px;border-radius:10px;background:#e8f7ef;color:#266947;border:1px solid #bde3cc;font-size:12px}.tool-grid{grid-template-columns:repeat(4,1fr)}@media(max-width:1180px){.tool-grid{grid-template-columns:repeat(3,1fr)}}@media(max-width:760px){.tool-grid{grid-template-columns:1fr}.segmented{grid-auto-flow:row;grid-template-columns:repeat(2,1fr)}#opMode{grid-template-columns:1fr 1fr}}
/* Electronics Studio v9: network builder, divider, smart solver, calculator */
#view-opamp .workspace{width:100%;max-width:1180px;margin-inline:auto;align-items:start}#view-opamp .panel,#view-opamp .result-panel{min-width:0;max-width:100%;overflow:hidden}#view-opamp .segmented{min-width:0}#view-opamp .segmented button{min-width:0;white-space:normal}
.legacy-hidden{display:none!important}.builder-topline{display:grid;grid-template-columns:minmax(150px,1.3fr) minmax(120px,.8fr) auto;gap:10px;align-items:end}.builder-topline .field{margin:0}.network-builder{display:grid;gap:10px;margin:18px 0}.z-component-row{display:grid;grid-template-columns:42px minmax(105px,.8fr) minmax(135px,1fr) minmax(130px,.9fr) 38px;gap:9px;align-items:end;padding:12px;border:1px solid var(--line);border-radius:14px;background:var(--surface2)}.z-component-row .z-index{height:40px;display:grid;place-items:center;border-radius:10px;background:var(--accent-soft);color:var(--accent);font-weight:850}.z-component-row .field{margin:0}.row-remove{height:40px;border:1px solid var(--line);background:var(--surface);border-radius:10px;color:var(--muted);font-weight:900;cursor:pointer}.builder-actions{display:flex;gap:10px}.builder-actions>*{flex:1}.network-summary{display:grid;gap:8px;margin:14px 0}.network-step{display:grid;grid-template-columns:40px 1fr auto;gap:10px;align-items:center;padding:12px;border:1px solid var(--line);border-radius:12px;background:var(--surface2)}.network-step .symbol{font-weight:900;color:var(--accent)}.network-step small{color:var(--muted)}
.solver-intro{display:grid;gap:4px;padding:13px 15px;border:1px solid var(--line);border-radius:13px;background:var(--surface2);margin:0 0 15px}.solver-intro span{font-size:12px;color:var(--muted);line-height:1.5}.solver-solved{border-left:3px solid var(--accent);padding:11px 13px;background:var(--accent-soft);border-radius:10px;margin:12px 0;font-size:12px}
.divider-workspace{align-items:start}.divider-editor{display:grid;gap:9px;margin:12px 0}.divider-editor-head{display:flex;justify-content:space-between;align-items:center;color:var(--muted);font-size:12px}.divider-row{display:grid;grid-template-columns:42px 1fr 38px;gap:9px;align-items:end;padding:11px;border:1px solid var(--line);border-radius:13px;background:var(--surface2)}.divider-row .field{margin:0}.divider-row .index{display:grid;place-items:center;height:40px;border-radius:10px;background:var(--accent-soft);color:var(--accent);font-weight:850}.divider-schematic{padding:16px;border:1px solid var(--line);border-radius:16px;background:var(--surface2);margin:15px 0}.schematic-chain{display:grid;justify-items:center}.sch-node{padding:5px 9px;border-radius:999px;background:var(--ink);color:var(--surface);font-size:11px;font-weight:800}.sch-res{width:min(290px,90%);padding:12px;margin:5px 0;border:1px solid var(--line);border-radius:11px;background:var(--surface);display:flex;justify-content:space-between;gap:10px}.sch-wire{height:18px;width:2px;background:var(--line)}
.quick-command{padding:28px}.quick-command h2{margin:5px 0 7px}.quick-command p{color:var(--muted);margin:0 0 20px}.task-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:10px}.task-grid button{display:grid;grid-template-columns:40px 1fr;grid-template-rows:auto auto;text-align:left;gap:1px 10px;padding:14px;border:1px solid var(--line);background:var(--surface2);color:var(--ink);border-radius:13px;cursor:pointer}.task-grid button>span{grid-row:1/3;display:grid;place-items:center;width:40px;height:40px;background:var(--accent-soft);color:var(--accent);border-radius:10px;font-weight:900}.task-grid strong{font-size:13px}.task-grid small{color:var(--muted)}.instant-strip{padding:24px;margin-top:18px}.instant-strip h3{margin:5px 0 18px}.instant-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:10px}.instant-tool{padding:13px;border:1px solid var(--line);border-radius:13px;background:var(--surface2)}.instant-tool>label{display:block;margin-bottom:8px}.instant-tool>div{display:grid;grid-template-columns:1fr 1fr;gap:7px}.instant-tool input{min-width:0;width:100%;padding:9px;border:1px solid var(--line);border-radius:9px;background:var(--surface);color:var(--ink)}.instant-tool output{display:block;margin-top:9px;font-weight:800;color:var(--accent)}
.calculator-shell{display:grid;grid-template-columns:minmax(420px,.95fr) minmax(400px,1.05fr);gap:18px;align-items:start}.calc-main,.calc-plot{padding:26px;min-width:0}.calc-mode{border:1px solid var(--line);background:var(--surface2);color:var(--accent);font-weight:850;padding:8px 12px;border-radius:10px}.calc-display{padding:15px;border:1px solid var(--line);border-radius:16px;background:var(--surface2);margin-bottom:12px}.calc-display small{display:block;color:var(--muted);font-size:10px}.calc-display input{width:100%;border:0;background:transparent;color:var(--ink);font:600 18px ui-monospace,SFMono-Regular,Menlo,monospace;padding:10px 0;outline:none}.calc-display output{display:block;text-align:right;font-size:28px;font-weight:850;overflow-wrap:anywhere}.calc-toolbar{display:grid;grid-template-columns:repeat(6,1fr);gap:6px;margin-bottom:7px}.calc-toolbar button,.calc-grid button,.constant-bar button{border:1px solid var(--line);background:var(--surface2);color:var(--ink);border-radius:9px;font-weight:750;cursor:pointer}.calc-toolbar button{padding:8px 4px;font-size:11px}.calc-grid{display:grid;grid-template-columns:repeat(6,1fr);gap:6px}.calc-grid button{min-height:43px}.calc-grid button.equals{background:var(--accent);color:#fff;border-color:var(--accent);grid-column:auto}.constant-bar{display:grid;grid-template-columns:repeat(6,1fr);gap:6px;margin-top:8px}.constant-bar button{padding:8px 3px;font-size:11px}.plot-result{margin-top:13px}.plot-svg{width:100%;display:block;touch-action:none}.plot-readout{font-size:11px;color:var(--muted);margin-top:6px}.calc-error{padding:10px;border-radius:10px;background:color-mix(in srgb,#c64545 10%,var(--surface));color:#ad3838;font-size:12px}
.confirm-modal{position:fixed;inset:0;display:none;place-items:center;background:rgba(10,20,32,.42);backdrop-filter:blur(8px);z-index:9000;padding:20px}.confirm-modal.open{display:grid}.confirm-card{width:min(390px,100%);background:var(--surface);border:1px solid var(--line);box-shadow:0 24px 70px rgba(0,0,0,.24);border-radius:20px;padding:24px;text-align:center}.confirm-icon{width:44px;height:44px;border-radius:50%;display:grid;place-items:center;margin:0 auto 12px;background:#b94444;color:#fff;font-weight:900}.confirm-card h3{margin:0 0 7px}.confirm-card p{color:var(--muted);line-height:1.55}.confirm-card>div:last-child{display:flex;gap:8px}.confirm-card>div:last-child>*{flex:1}.danger-action{background:#b94444!important;border-color:#b94444!important}.sidebar-backdrop{position:fixed;inset:0;background:rgba(10,20,30,.25);backdrop-filter:blur(2px);z-index:89;display:none}.sidebar-backdrop.open{display:block}.sidebar{z-index:90}
.history-count{z-index:12!important;right:-8px!important;top:-7px!important;transform:none!important;box-shadow:0 2px 8px rgba(0,0,0,.2);border:3px solid var(--surface)!important}.history-orb img{position:relative;z-index:2}
.field-feedback{margin-top:6px;padding:8px 10px;border-radius:9px;background:var(--accent-soft);color:var(--muted);font-size:11px;line-height:1.45}.field-feedback b{color:var(--accent)}.field.invalid input,.field.invalid select{border-color:#c95b5b!important}.field.valid-hint input{border-color:color-mix(in srgb,var(--accent) 45%,var(--line))}
@media(max-width:900px){.task-grid{grid-template-columns:repeat(2,1fr)}.calculator-shell{grid-template-columns:1fr}.impedance-workspace,.divider-workspace{grid-template-columns:1fr}.builder-topline{grid-template-columns:1fr 1fr}.builder-topline button{grid-column:1/-1}.z-component-row{grid-template-columns:38px 1fr 1fr 36px}.z-component-row .z-connection{grid-column:2/4}.instant-grid{grid-template-columns:1fr}}
@media(max-width:800px){#view-opamp .workspace{grid-template-columns:1fr!important;margin:0!important}#view-opamp .segmented{grid-auto-flow:row;grid-template-columns:repeat(2,minmax(0,1fr))}.task-grid{grid-template-columns:1fr}.calc-main,.calc-plot{padding:20px}.calc-grid{gap:5px}.calc-grid button{min-height:40px;font-size:12px}.constant-bar{grid-template-columns:repeat(3,1fr)}.z-component-row{grid-template-columns:34px 1fr 34px}.z-component-row .z-type,.z-component-row .z-value,.z-component-row .z-connection{grid-column:2}.z-component-row .row-remove{grid-column:3;grid-row:1}.instant-tool>div{grid-template-columns:1fr 1fr}}
/* ---------- Circuit Lab entry card ---------- */
.advanced-lab-card{margin-top:16px;padding:0;overflow:hidden;display:grid;grid-template-columns:minmax(0,1fr) minmax(280px,.7fr);cursor:pointer;text-align:left;color:var(--ink);border:1px solid var(--line);background:linear-gradient(135deg,var(--surface) 0%,var(--surface) 55%,#e5f7f5 100%);transition:.22s}.advanced-lab-card:hover{transform:translateY(-2px);box-shadow:var(--shadow);border-color:#9fc8cb}.advanced-lab-copy{padding:30px 34px}.advanced-lab-copy h3{font-size:26px;margin:4px 0 10px;letter-spacing:-.6px}.advanced-lab-copy p{margin:0;color:var(--muted);line-height:1.6;max-width:680px}.advanced-lab-copy em{display:inline-flex;margin-top:18px;color:var(--accent);font-style:normal;font-weight:850;font-size:13px}.advanced-lab-visual{min-height:200px;background:#0c2230;position:relative;overflow:hidden;background-image:linear-gradient(rgba(86,213,205,.08) 1px,transparent 1px),linear-gradient(90deg,rgba(86,213,205,.08) 1px,transparent 1px);background-size:22px 22px}.advanced-lab-visual svg{position:absolute;inset:20px;width:calc(100% - 40px);height:calc(100% - 40px)}
@media(max-width:1180px){.advanced-lab-card{grid-template-columns:1fr .55fr}}
@media(max-width:800px){.advanced-lab-card{grid-template-columns:1fr}.advanced-lab-visual{min-height:150px}.advanced-lab-copy{padding:25px}}