:root{--bg: #0c1418;--panel: #15242b;--line: #25434f;--ink: #eaf6fb;--dim: #93b3bf;--accent: #4a9cc0;--ok: #5fd2a0;--bad: #e0654a;--fluid: #2a8fc4}*{box-sizing:border-box}html,body{margin:0;height:100%}body{background:radial-gradient(900px 560px at 50% -8%,#12252e,var(--bg));color:var(--ink);font-family:system-ui,-apple-system,Segoe UI,sans-serif;display:flex;justify-content:center;-webkit-user-select:none;user-select:none}#app{width:100%;max-width:640px;padding:12px 12px 26px}header{text-align:center;margin-bottom:6px}h1{margin:0;font-size:26px;letter-spacing:4px;font-weight:800;color:var(--accent)}.sub{margin:3px 0 0;color:var(--dim);font-size:13px}.bar{display:flex;gap:8px;justify-content:center;flex-wrap:wrap;align-items:center;margin:9px 0}.seg{display:inline-flex;background:var(--panel);border:1px solid var(--line);border-radius:999px;overflow:hidden}.seg button{background:none;border:none;color:var(--dim);padding:6px 13px;font:600 13px system-ui;cursor:pointer}.seg button.active{background:var(--accent);color:#04161d}.btn{background:var(--panel);border:1px solid var(--line);color:var(--ink);padding:7px 14px;border-radius:999px;font:700 13px system-ui;cursor:pointer}.btn:hover{border-color:var(--accent)}.status{text-align:center;min-height:20px;margin:6px 0;color:var(--dim);font-size:13px;font-weight:600}.stage{position:relative;display:flex;justify-content:center}canvas{width:100%;max-width:600px;height:auto;display:block;border-radius:8px;background:#071217;box-shadow:0 12px 34px #0000008c;touch-action:none}.knobs{margin:12px 0 0;display:flex;flex-direction:column;gap:8px}.knob{background:var(--panel);border:1px solid var(--line);border-radius:10px;padding:9px 12px}.knob .klab{font-size:12px;color:var(--dim);margin-bottom:6px;display:flex;justify-content:space-between}.knob .kval{color:var(--accent);font-weight:700}.knob .opts{display:flex;gap:6px;flex-wrap:wrap}.knob .opts button{flex:1 1 0;min-width:52px;background:#0e1c22;border:1px solid var(--line);color:var(--ink);padding:7px 4px;border-radius:7px;font:700 13px system-ui;cursor:pointer}.knob .opts button.sel{background:var(--accent);color:#04161d;border-color:var(--accent)}.knob .opts button:hover{border-color:var(--accent)}.demands{margin-top:12px;display:flex;gap:8px}.demand{flex:1;background:var(--panel);border:1px solid var(--line);border-radius:10px;padding:9px 11px;font-size:12px}.demand h3{margin:0 0 6px;font-size:13px;color:var(--accent)}.demand .row{display:flex;justify-content:space-between;margin:3px 0;color:var(--dim)}.demand .row .v{font-weight:700}.demand .row.met .v{color:var(--ok)}.demand .row.fail .v{color:var(--bad)}.demand.solved{border-color:var(--ok)}.overlay{position:absolute;inset:0;display:flex;align-items:center;justify-content:center;background:#060e12c7;border-radius:8px;backdrop-filter:blur(3px)}.overlay.hidden{display:none}.card{background:var(--panel);border:1px solid var(--line);border-radius:16px;padding:22px 26px;text-align:center;max-width:360px}.card h2{margin:0 0 6px;font-size:24px;color:var(--ok)}.card p{margin:6px 0;color:var(--dim);font-size:14px}.card .row{display:flex;gap:8px;justify-content:center;margin-top:14px}.hint{text-align:center;color:var(--dim);font-size:12px;margin-top:12px;line-height:1.5}