:root{color-scheme:dark;--bg: #000000;--panel: #0a0a0a;--line: #2a2a2a;--text: #e8e8e8;--dim: #8a8a8a;--accent: #ffffff}*{box-sizing:border-box}html,body,#root{margin:0;height:100%}body{background:var(--bg);color:var(--text);font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace}.app{max-width:1100px;margin:0 auto;padding:20px 20px 60px}header{display:flex;align-items:center;justify-content:space-between;padding:8px 0 18px;border-bottom:1px solid var(--line);margin-bottom:20px}.logo{font-size:22px}.logo .l1{color:var(--accent);font-weight:700}.logo .l2{color:var(--dim);font-size:14px;margin-left:8px}main{display:flex;flex-direction:column;gap:20px}.panel{background:var(--panel);border:1px solid var(--line);border-radius:12px;padding:16px 18px}.panel h2{margin:0 0 12px;font-size:13px;text-transform:uppercase;letter-spacing:.12em;color:var(--dim)}.row{display:flex;align-items:center;gap:14px;margin:10px 0;flex-wrap:wrap}.row.wrap{flex-wrap:wrap}.row label{color:var(--dim);font-size:13px;gap:6px}input,select,textarea,button{font-family:inherit}input,select{background:#000;border:1px solid var(--line);color:var(--text);border-radius:8px;padding:8px 10px;font-size:13px}input.num{width:90px}input.prompt{flex:1;min-width:220px}button{background:#101010;border:1px solid var(--line);color:var(--text);padding:8px 14px;border-radius:8px;cursor:pointer;font-size:13px}button:hover{border-color:var(--accent)}button.primary{background:var(--accent);color:#000;border-color:var(--accent);font-weight:700}button.small{padding:6px 10px;font-size:12px}button:disabled{opacity:.5;cursor:default}.err{color:var(--text);font-size:13px;font-weight:700}.textarea{width:100%;min-height:130px;resize:vertical;background:#000;border:1px solid var(--line);color:var(--text);border-radius:8px;padding:10px;font-size:12px;line-height:1.2}.frame{margin:0;white-space:pre;font-family:Courier New,ui-monospace,monospace;font-variant-ligatures:none;letter-spacing:.4em;line-height:1}.frame.dim{opacity:.45}.treebox{position:relative;height:460px;overflow:hidden;border:1px solid var(--line);border-radius:10px;background:#000}.codebox{border:1px solid var(--line);border-radius:10px;overflow:hidden}.treepanel{margin:0 0 20px;width:96vw;margin-left:calc(50% - 48vw)}.treelabel{font-size:13px;text-transform:uppercase;letter-spacing:.12em;color:var(--dim);margin:0 0 10px}.treepanel .treebox{height:72vh;border-color:var(--line)}.codebar{display:flex;justify-content:space-between;align-items:center;padding:8px 12px;background:#000;border-bottom:1px solid var(--line);color:var(--dim);font-size:12px}.code{margin:0;padding:12px 14px;max-height:320px;overflow:auto;font-size:11px;line-height:1.25;color:var(--text);white-space:pre}.treecanv{display:block;cursor:grab;touch-action:none}.treecanv:active{cursor:grabbing}.treecanv .edge{stroke:var(--line);stroke-width:1.5;fill:none}.treecanv .edge.hot{stroke:var(--accent);stroke-width:2}.timg{display:flex;align-items:center;justify-content:center;width:100%;height:100%}.tnode.win .timg canvas{outline:2px solid var(--accent);outline-offset:1px}.tscore{fill:var(--dim);font-size:11px;text-anchor:middle;font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace}.tnode.win .tscore{fill:var(--accent)}.treehint{position:absolute;bottom:8px;left:10px;color:var(--dim);font-size:11px;pointer-events:none}.treehint b{color:var(--accent)}.fscore{color:var(--dim);font-size:10px}.tcell.win .fscore{color:var(--accent)}.cand canvas.dim{opacity:.45}.genframe{display:flex;justify-content:center;padding:10px 0}.stage{display:flex;gap:24px;align-items:flex-start;justify-content:center;flex-wrap:wrap}.side{display:flex;flex-direction:column;gap:8px;min-width:220px}.side .stephead{margin:0}.pill{color:var(--dim);border:1px solid var(--line);border-radius:8px;padding:6px 10px;font-size:12px}.spark{display:flex;align-items:flex-end;gap:2px;height:48px;border-bottom:1px solid var(--line)}.spark span{flex:1;min-width:2px;background:var(--accent);opacity:.7}.scrub{flex:1;accent-color:var(--accent)}.dim{color:var(--dim)}.stepdetail{margin-top:12px;border-top:1px solid var(--line);padding-top:12px}.stephead{color:var(--dim);font-size:12px;margin-bottom:10px}.cands{display:flex;gap:10px;overflow-x:auto}.cand{border:1px solid transparent;border-radius:8px;padding:4px}.cand.win{border-color:var(--accent)}