:root{--pos:#0877bd;--neg:#f59322;--neural:#0877bd;--symbolic:#8e44ad;--accent:#183d4e;--bg:#f7f7f7;--panel:#fff;--ink:#233138;--muted:#777f86;--line:#e4e7ea;--line-strong:#cfd5da;--radius:10px;--shadow:0 1px 3px #0000001f, 0 1px 2px #00000014;--shadow-lg:0 8px 24px #00000024;color:var(--ink);background:var(--bg);font-family:Roboto,Helvetica Neue,Arial,system-ui,sans-serif}*{box-sizing:border-box}html,body{min-height:100vh;margin:0;padding:0}#app{flex-direction:column;min-height:100vh;display:flex}button{cursor:pointer;font-family:inherit}.topbar{background:var(--accent);color:#fff;box-shadow:var(--shadow);align-items:center;gap:16px;padding:12px 24px;display:flex}.topbar h1{letter-spacing:.3px;margin:0;font-size:18px;font-weight:400}.topbar .brand-mark{font-size:22px}.topbar .spacer{flex:1}.stepper{align-items:center;gap:8px;font-size:13px;display:flex}.stepper .step{color:#ffffffa6;cursor:pointer;white-space:nowrap;background:#ffffff14;border-radius:20px;align-items:center;gap:6px;padding:4px 10px;display:flex}.stepper .step.active{color:#fff;background:#ffffff38}.stepper .step .num{background:#ffffff4d;border-radius:50%;place-items:center;width:18px;height:18px;font-size:11px;display:inline-grid}.stepper .sep{color:#fff6}.view{flex:1;width:100%;max-width:1160px;margin:0 auto;padding:28px 24px 48px}.view-head{margin-bottom:20px}.view-head h2{margin:0 0 4px;font-size:22px;font-weight:500}.view-head p{color:var(--muted);margin:0;font-size:14px}.card-grid{grid-template-columns:repeat(auto-fill,minmax(250px,1fr));gap:18px;display:grid}.situation-card{background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow);cursor:pointer;flex-direction:column;gap:10px;padding:18px;transition:transform .12s,box-shadow .12s,border-color .12s;display:flex}.situation-card:hover{box-shadow:var(--shadow-lg);border-color:var(--line-strong);transform:translateY(-3px)}.situation-card.selected{border-color:var(--neural);box-shadow:0 0 0 2px #0877bd40, var(--shadow)}.situation-card .icon{font-size:30px}.situation-card h3{margin:0;font-size:16px;font-weight:500}.situation-card .tagline{color:var(--muted);margin:0;font-size:13px;line-height:1.45}.complexity{color:var(--muted);align-items:center;gap:3px;margin-top:auto;font-size:11px;display:inline-flex}.complexity .dot{background:var(--line-strong);border-radius:50%;width:7px;height:7px}.complexity .dot.on{background:var(--neural)}select{border:1px solid var(--line-strong);color:var(--ink);background:#fff;border-radius:8px;padding:6px 10px;font-family:inherit;font-size:13px}select:hover{background:#f0f3f5}.btn{border:1px solid var(--line-strong);color:var(--ink);background:#fff;border-radius:8px;padding:9px 18px;font-size:14px;transition:background .12s,border-color .12s,transform 60ms}.btn:hover{background:#f0f3f5}.btn:active{transform:translateY(1px)}.btn.primary{background:var(--neural);border-color:var(--neural);color:#fff}.btn.primary:hover{background:#0a6aa8}.btn:disabled{opacity:.5;cursor:not-allowed}.btn-row{align-items:center;gap:12px;margin-top:24px;display:flex}.builder{grid-template-columns:1fr 320px;align-items:start;gap:24px;display:grid}.canvas{background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow);min-height:360px;padding:24px}.flow-row{flex-wrap:wrap;justify-content:center;align-items:stretch;gap:0;display:flex}.flow-row.reverse{flex-direction:row-reverse}.block{width:220px;box-shadow:var(--shadow);cursor:pointer;background:#fff;border:2px solid #0000;border-radius:12px;padding:16px;transition:transform .12s,box-shadow .12s,border-color .12s;position:relative}.block:hover{box-shadow:var(--shadow-lg);transform:translateY(-2px)}.block.neural{border-color:var(--neural)}.block.symbolic{border-color:var(--symbolic)}.block .block-head{align-items:center;gap:8px;margin-bottom:8px;font-size:15px;font-weight:500;display:flex}.block .block-head .tag{text-transform:uppercase;letter-spacing:.6px;color:var(--muted);border:1px solid var(--line);border-radius:10px;margin-left:auto;padding:1px 7px;font-size:10px}.block .mini{border:1px dashed var(--line-strong);background:#fafbfc;border-radius:8px;place-items:center;height:78px;display:grid;overflow:hidden}.block .hint{color:var(--muted);text-align:center;margin-top:8px;font-size:11px}.block.dragging{opacity:.5}.block.drop-target{border-style:dashed}.connector{color:var(--muted);-webkit-user-select:none;user-select:none;align-items:center;padding:0 6px;font-size:26px;display:flex}.panel{background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow);padding:18px}.panel h4{text-transform:uppercase;letter-spacing:.6px;color:var(--muted);margin:0 0 12px;font-size:13px}.field{margin-bottom:16px}.field label{color:var(--ink);margin-bottom:6px;font-size:13px;display:block}.field select,.field input[type=number]{border:1px solid var(--line-strong);background:#fff;border-radius:8px;width:100%;padding:8px 10px;font-size:14px}.field input[type=range]{width:100%}.pattern-list{flex-direction:column;gap:10px;display:flex}.pattern-opt{border:1px solid var(--line);cursor:pointer;border-radius:10px;padding:12px;transition:border-color .12s,background .12s}.pattern-opt:hover{background:#f6f8fa}.pattern-opt.selected{border-color:var(--neural);background:#0877bd0d}.pattern-opt .flow{font-size:14px;font-weight:500}.pattern-opt .taxo{color:var(--symbolic);margin-top:2px;font-size:11px}.pattern-opt .sum{color:var(--muted);margin-top:6px;font-size:12px;line-height:1.4}.modal-backdrop{z-index:50;background:#141c2173;place-items:center;padding:24px;display:grid;position:fixed;inset:0}.modal{background:var(--panel);box-shadow:var(--shadow-lg);border-radius:14px;width:min(960px,96vw);max-height:92vh;padding:22px 24px;overflow:auto}.modal-head{align-items:center;gap:10px;margin-bottom:16px;display:flex}.modal-head h3{margin:0;font-size:18px;font-weight:500}.modal-head .close{color:var(--muted);cursor:pointer;background:0 0;border:none;margin-left:auto;font-size:22px;line-height:1}.tf-modal{flex-direction:column;width:min(1180px,97vw);height:90vh;max-height:94vh;padding:0;display:flex;overflow:hidden}.tf-modal .modal-head{border-bottom:1px solid var(--line);flex:none;margin:0;padding:16px 20px 14px}.tf-sub{color:var(--muted);border:1px solid var(--line);border-radius:10px;margin-left:4px;padding:2px 8px;font-size:11px}.tf-frame{background:#f7f7f7;border:0;flex:auto;width:100%;min-height:0;display:block}.prop-wrap{background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow);padding:28px}.prop-bar{border:1px solid var(--line-strong);border-radius:24px;height:46px;margin:20px 0 8px;display:flex;overflow:hidden}.prop-bar .seg-neural{background:var(--neural);color:#fff;place-items:center;font-size:13px;transition:width .15s;display:grid}.prop-bar .seg-symbolic{background:var(--symbolic);color:#fff;place-items:center;font-size:13px;transition:width .15s;display:grid}.prop-scale{color:var(--muted);justify-content:space-between;font-size:12px;display:flex}.results-grid{grid-template-columns:repeat(3,1fr);gap:18px;margin-bottom:22px;display:grid}.metric-card{background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow);padding:18px}.metric-card .label{text-transform:uppercase;letter-spacing:.5px;color:var(--muted);font-size:12px}.metric-card .value{margin:6px 0;font-size:30px;font-weight:600}.meter{background:var(--line);border-radius:4px;height:8px;overflow:hidden}.meter>span{border-radius:4px;height:100%;transition:width .3s;display:block}.note{color:#7a6314;background:#fbf7ef;border:1px solid #f0e3c8;border-radius:10px;padding:14px 16px;font-size:13px;line-height:1.5}.flow-demo{min-height:96px}.flow-node{border:1px solid var(--line);text-align:center;white-space:pre-line;border-radius:12px;place-items:center;min-height:72px;padding:14px 12px;font-size:12px;font-weight:600;transition:opacity .25s,transform .25s,filter .25s;display:grid}.flow-node.pending,.flow-arrow.pending{opacity:.28}.flow-node.pending{filter:grayscale(.65);transform:scale(.98)}.flow-node.neural{color:#8a4d00;background:#f593221a;border-color:#f5932266}.flow-node.symbolic{color:#0d4e7e;background:#0877bd14;border-color:#0877bd59}.flow-node.output{color:#5c2b76;background:#8e44ad14;border-color:#8e44ad59}.flow-payload{text-align:left;white-space:normal;word-break:break-word;background:#ffffffb3;border:1px solid #10182814;border-radius:8px;width:100%;padding:8px 10px;font-family:SFMono-Regular,ui-monospace,monospace;font-size:11px;font-weight:600;line-height:1.5;display:block}.flow-arrow{color:var(--muted);font-size:26px}.lab-grid{gap:8px;width:fit-content;margin-top:18px;display:grid}.lab-token-row{flex-wrap:wrap;gap:10px;margin-top:18px;display:flex}.lab-token{border:1px solid var(--line);background:var(--panel);min-height:42px;color:var(--ink);font:inherit;border-radius:9px;padding:10px 14px;font-weight:600}button.lab-token{cursor:pointer}.muted{color:var(--muted)}.center{text-align:center}.seg{flex-wrap:wrap;gap:8px;margin:4px 0 14px;display:flex}.seg-btn{background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);min-width:150px;box-shadow:var(--shadow);cursor:pointer;text-align:left;flex-direction:column;flex:1 1 0;gap:2px;padding:10px 12px;transition:border-color .15s,background .15s;display:flex}.seg-btn:hover{border-color:var(--pos)}.seg-btn.active{border-color:var(--pos);background:#eef5fb}.seg-flow{color:var(--ink,#183d4e);font-size:13px;font-weight:600}.seg-name{color:var(--muted);font-size:11px}.badge{border-radius:999px;padding:2px 9px;font-size:12px;font-weight:600;display:inline-block}.badge-strong{color:#b5651d;background:#fdecdc;border:1px solid #f3cda3}.badge-weak{color:#2f7d46;background:#e7f3ea;border:1px solid #b9ddc4}.badge-seen{color:#51606b;background:#eef2f5;border:1px solid #d7dee3}.badge-heldout{color:#0b5a8c;background:#eaf3fb;border:1px solid #bcdcf2}.digit-picker{flex-wrap:wrap;align-items:center;gap:6px;display:flex}.digit-picker-label{min-width:60px;font-size:12px}.digit-thumb{border:2px solid var(--line-strong);background:#fff;border-radius:6px;place-items:center;width:34px;height:34px;padding:2px;display:grid;overflow:hidden}.digit-thumb img{object-fit:contain;width:100%;height:100%}.digit-thumb:hover{border-color:var(--pos)}.digit-thumb.active{border-color:var(--pos);background:#eef5fb}.compound-picker{flex-wrap:wrap;gap:8px;display:flex}.compound-token{border:2px solid var(--line-strong);cursor:pointer;text-align:left;background:#fff;border-radius:8px;flex-direction:column;align-items:flex-start;gap:2px;min-width:140px;padding:8px 12px;display:flex}.compound-token .name{color:var(--ink,#183d4e);font-size:13px;font-weight:600}.compound-token .note{color:var(--muted);font-size:11px}.compound-token:hover{border-color:var(--pos)}.compound-token.active{border-color:var(--pos);background:#eef5fb}