:root{--bg: #101513;--panel: #1a2420;--line: #2d3d37;--ink: #eef5f2;--dim: #9bb3ab;--accent: #4a9c8a;--ok: #62d98a;--bad: #e0654a}*{box-sizing:border-box}html,body{margin:0;height:100%}body{background:radial-gradient(900px 560px at 50% -8%,#15201c,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:26px;letter-spacing:3px;font-weight:800;color:var(--accent)}.sub{margin:2px 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:#06201a}.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:#06201a;border-color:var(--accent)}.status{text-align:center;min-height:20px;margin:6px 0;color:var(--dim);font-size:13px;font-weight:600;transition:color .15s}.status.good{color:var(--ok)}.status.bad{color:var(--bad)}.meter{width:100%;max-width:440px;height:6px;margin:0 auto 10px;background:var(--panel);border:1px solid var(--line);border-radius:999px;overflow:hidden}.meter-fill{height:100%;width:100%;background:linear-gradient(90deg,var(--accent),var(--ok));transition:width .08s linear}.stage{position:relative;display:flex;justify-content:center}canvas{width:100%;max-width:440px;height:auto;display:block;border-radius:10px;background:#0c100e;box-shadow:0 12px 34px #0000008c;touch-action:none;cursor:pointer}.overlay{position:absolute;inset:0;display:flex;align-items:center;justify-content:center;background:#080e0cbd;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(--ink);font-size:14px}.card p.dim{color:var(--dim);font-size:12px}.card .row{display:flex;gap:8px;justify-content:center;margin-top:14px}.hint{text-align:center;color:var(--dim);font-size:12px;margin-top:10px}