:root{--bg: #0c1118;--panel: #131c28;--panel2: #1b2736;--line: #243246;--ink: #dce6f2;--dim: #7e8ea3;--accent: #4dd2ff;font-family:Segoe UI,system-ui,sans-serif}*{box-sizing:border-box;-webkit-tap-highlight-color:transparent}html,body{margin:0;height:100%;background:var(--bg);color:var(--ink);overflow:hidden}#app{display:flex;flex-direction:column;height:100dvh;max-width:720px;margin:0 auto}header{display:flex;align-items:center;gap:10px;padding:10px 14px 6px}header h1{font-size:19px;margin:0;letter-spacing:.5px;font-weight:700}header h1 .k{color:var(--accent)}header .spacer{flex:1}.iconbtn{background:var(--panel2);border:1px solid var(--line);color:var(--ink);border-radius:8px;width:38px;height:34px;font-size:16px;cursor:pointer}.iconbtn:active{transform:translateY(1px)}.tabs{display:flex;gap:6px;padding:0 14px 6px}.tabs button{flex:1;background:var(--panel);border:1px solid var(--line);color:var(--dim);padding:8px;border-radius:9px;cursor:pointer;font-size:13px;font-weight:600}.tabs button.on{color:var(--bg);background:var(--accent);border-color:var(--accent)}.bar{display:flex;align-items:center;gap:8px;padding:2px 14px 8px;font-size:13px;color:var(--dim);flex-wrap:wrap}.bar .stat{color:var(--ink);font-variant-numeric:tabular-nums}.bar .pill{background:var(--panel2);border:1px solid var(--line);border-radius:999px;padding:3px 10px}.bar .spacer{flex:1}.bar button{background:var(--panel2);border:1px solid var(--line);color:var(--ink);border-radius:8px;padding:6px 11px;font-size:12px;cursor:pointer}.levels{display:flex;gap:6px;padding:0 14px 6px;overflow-x:auto}.levels button{flex:0 0 auto;background:var(--panel);border:1px solid var(--line);color:var(--dim);width:38px;height:36px;border-radius:8px;cursor:pointer;font-weight:700;font-size:13px}.levels button.on{color:var(--bg);background:var(--accent);border-color:var(--accent)}.levels button.done{color:#7bff6b;border-color:#2f5b34}.canvaswrap{flex:1;position:relative;min-height:0}canvas{position:absolute;inset:0;width:100%;height:100%;touch-action:none}.overlay{position:absolute;inset:0;display:none;align-items:center;justify-content:center;background:#080c12d1;backdrop-filter:blur(3px);z-index:5}.overlay.show{display:flex}.card{background:var(--panel);border:1px solid var(--line);border-radius:16px;padding:22px 24px;text-align:center;max-width:320px;width:86%}.card h2{margin:0 0 6px;font-size:22px}.card h2 .k{color:var(--accent)}.card p{color:var(--dim);margin:4px 0;font-size:14px}.card .big{color:var(--ink);font-size:15px;font-variant-numeric:tabular-nums}.card .row{display:flex;gap:8px;margin-top:14px}.card .row button{flex:1;border:none;border-radius:10px;padding:11px;font-size:14px;font-weight:600;cursor:pointer}.card .primary{background:var(--accent);color:var(--bg)}.card .ghost{background:var(--panel2);color:var(--ink);border:1px solid var(--line)}.hint{padding:4px 14px 10px;color:var(--dim);font-size:12px;text-align:center}.toast{position:absolute;bottom:18px;left:50%;transform:translate(-50%);background:var(--panel2);border:1px solid var(--line);color:var(--ink);padding:8px 14px;border-radius:10px;font-size:13px;opacity:0;transition:opacity .2s;pointer-events:none;z-index:6}.toast.show{opacity:1}