:root{--bg:#f7f8f4;--ink:#192e2b;--muted:#738078;--line:#e0e6db;--green:#296e54;--blue:#527fa2;--red:#c87b6b}*{box-sizing:border-box}[hidden]{display:none!important}body{margin:0;background:var(--bg);color:var(--ink);font:15px -apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif}main{max-width:900px;margin:auto;padding:0 24px}header{display:flex;align-items:center;justify-content:space-between;padding:23px 0;border-bottom:1px solid var(--line)}.brand{font-size:23px;font-weight:750;letter-spacing:1px;color:var(--ink);text-decoration:none}.brand span{color:var(--muted);font-weight:400;margin-left:4px}.pill{font-size:11px;color:var(--muted)}.intro{padding:30px 0 20px}.eyebrow{font-size:10px;font-weight:750;letter-spacing:1.6px;color:var(--green)}h1{font-size:clamp(28px,5vw,42px);letter-spacing:-1.2px;line-height:1.15;margin:10px 0 14px}.intro>p:last-child{color:var(--muted);line-height:1.7;max-width:600px;font-size:13px}.card{background:white;border:1px solid var(--line);border-radius:16px;padding:25px}.model-heading{display:flex;justify-content:space-between;align-items:start;gap:18px}h2{font-size:17px;font-weight:600;line-height:1.5;margin:7px 0;overflow-wrap:anywhere}#status{flex-shrink:0;font-size:11px;border-radius:20px;background:#eff4e8;padding:8px 12px;color:#55703e}.muted{color:var(--muted);font-size:12px;line-height:1.6;margin:6px 0}.controls{display:flex;flex-wrap:wrap;gap:12px;align-items:end;margin:20px 0 10px}label{display:flex;flex-direction:column;gap:6px;font-size:11px;color:var(--muted)}select,button{font:inherit;font-size:13px;min-height:42px;border-radius:7px;padding:9px 15px}select{background:white;color:var(--ink);border:1px solid var(--line);min-width:180px}button{background:var(--green);color:white;border:1px solid var(--green);font-weight:550;cursor:pointer}.secondary{background:white;color:var(--green)}button:disabled{opacity:.45;cursor:default}.board-wrap{margin:24px auto 10px;max-width:650px;text-align:center}.edge{display:block;font-size:10px;font-weight:700;letter-spacing:1.5px;color:var(--blue);margin:14px 0}.red-edge{color:var(--red)}svg{display:block;width:100%;max-height:540px;overflow:visible}.hex polygon{fill:#f3f5ee;stroke:#dce2d7;stroke-width:2}.hex text{font-family:ui-monospace,SFMono-Regular,Menlo,monospace;font-variant-numeric:tabular-nums;fill:#7f8c7e;pointer-events:none}.hex.available{cursor:pointer}.hex.available:hover polygon,.hex.available:focus polygon{fill:#e9f0dd;stroke:#9aaf80}.hex.blue polygon{fill:var(--blue);stroke:#466f8d}.hex.red polygon{fill:var(--red);stroke:#b56c5e}.hex.blue text,.hex.red text{fill:white}.hex.path polygon{stroke:#d3b657;stroke-width:5}.hex.suggested polygon{fill:#e4edcb;stroke:#688b3d;stroke-width:5}.hex.suggested text{fill:#355521;font-weight:700}.message{font-size:14px;line-height:1.7;text-align:center;margin:15px 0}.hint-message{background:#f4f7ec;border:1px solid #dce6cc;border-radius:8px;padding:13px;font-size:12px;line-height:1.7}.legend{display:flex;justify-content:center;gap:22px;flex-wrap:wrap;font-size:11px;color:var(--muted);border-top:1px solid var(--line);padding-top:18px;margin-top:20px}.legend i{display:inline-block;width:8px;height:8px;border-radius:50%;margin-right:5px}.legend .blue{background:var(--blue)}.legend .red{background:var(--red)}footer{font-size:11px;line-height:1.6;color:var(--muted);padding:23px 0 30px;text-align:center}#error{padding:14px;background:#f9e9e5;color:#8a3c2e;border-radius:8px;font-size:13px;line-height:1.5}@media(max-width:600px){main{padding:0 14px}.card{padding:18px}.model-heading{display:block}#status{display:inline-block;margin-top:10px}.intro{padding-top:22px}.pill{display:none}.controls{gap:9px}select{min-width:155px}.board-wrap{margin-top:20px}}