:root{--bg: #0b1020;--panel: #16203a;--line: #243352;--ink: #eaf2ff;--dim: #93a6c9;--accent: #5ad1ff;--mirror: #ff6bd0;--goal: #3fd0c9;--box: #e7b84a}*{box-sizing:border-box}html,body{margin:0;height:100%}body{background:radial-gradient(900px 560px at 50% -8%,#141d36,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:600px;padding:12px 12px 26px}header{text-align:center;margin-bottom:6px}h1{margin:0;font-size:25px;letter-spacing:3px;font-weight:800;color:var(--accent)}.sub{margin:3px 0 0;color:var(--dim);font-size:13px}.sub b{color:var(--mirror)}.bar{display:flex;gap:8px;justify-content:center;flex-wrap:wrap;align-items:center;margin:10px 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:#042033}.sel{background:var(--panel);border:1px solid var(--line);color:var(--ink);padding:6px 10px;border-radius:999px;font:600 13px system-ui;cursor:pointer}.sel:disabled{opacity:.45;cursor:not-allowed}.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)}.btn.primary{background:var(--accent);color:#042033;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:520px;height:auto;display:block;border-radius:10px;background:#0a0f1a;box-shadow:0 12px 34px #0000008c;touch-action:none;cursor:pointer;outline:none}canvas:focus{box-shadow:0 0 0 2px var(--accent),0 12px 34px #0000008c}.overlay{position:absolute;inset:0;display:flex;align-items:center;justify-content:center;background:#060a16bd;border-radius:10px;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:340px}.card h2{margin:0 0 6px;font-size:24px;color:var(--accent)}.card p{margin:6px 0;color:var(--dim);font-size:14px}.card .row{display:flex;gap:8px;justify-content:center;margin-top:14px;flex-wrap:wrap}.legend{display:flex;gap:14px;justify-content:center;flex-wrap:wrap;margin:12px 0 2px;color:var(--dim);font-size:12px}.legend span{display:inline-flex;align-items:center;gap:5px}.sw{width:12px;height:12px;border-radius:3px;display:inline-block}.sw.pri{background:var(--accent);border-radius:50%}.sw.mir{background:var(--mirror);border-radius:50%}.sw.box{background:var(--box)}.sw.goal{background:transparent;border:2px solid var(--goal)}.hint{text-align:center;color:var(--dim);font-size:12px;margin-top:10px}