:root{--bg: #0e0c16;--panel: #1a1626;--line: #2f2842;--ink: #efeaf7;--dim: #a99fc0;--accent: #8a6fd0;--staff: #d8d2e8;--note: #efe7ff;--good: #5fd08a;--bad: #e0667a}*{box-sizing:border-box}html,body{margin:0;height:100%}body{background:radial-gradient(900px 560px at 50% -8%,#1c1430,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:560px;padding:12px 12px 26px}header{text-align:center;margin-bottom:6px}h1{margin:0;font-size:28px;letter-spacing:6px;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: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:#160c2a}.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:#160c2a;border-color:var(--accent)}.scoreboard{display:flex;gap:10px;justify-content:center;margin:8px 0}.readout{background:#0a0712;border:1px solid var(--line);border-radius:8px;padding:5px 14px;font:800 18px ui-monospace,monospace;color:var(--accent);min-width:80px;text-align:center}.readout span{color:var(--dim);font-size:11px;display:block;font-weight:600;letter-spacing:.5px}.stage{position:relative;display:flex;justify-content:center}#staff{width:min(96vw,540px);height:260px;background:#0a0712;border:1px solid var(--line);border-radius:10px;display:block;touch-action:none}.clefname{text-align:center;color:var(--dim);font-size:13px;margin:8px 0 2px;min-height:18px}.clefname b{color:var(--accent)}.pad{display:grid;grid-template-columns:repeat(7,1fr);gap:6px;max-width:460px;margin:12px auto 0}.pad button{background:var(--panel);border:1px solid var(--line);color:var(--ink);padding:14px 0;border-radius:8px;font:800 20px ui-monospace,monospace;cursor:pointer}.pad button:hover{border-color:var(--accent)}.pad button.flash-good{background:var(--good);color:#0a2615;border-color:var(--good)}.pad button.flash-bad{background:var(--bad);color:#2a0a10;border-color:var(--bad)}.overlay{position:absolute;inset:0;display:flex;align-items:center;justify-content:center;background:#0a0712d1;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}.hint{text-align:center;color:var(--dim);font-size:12px;margin-top:12px;line-height:1.5}