:root{--bg: #14110d;--panel: #221c14;--line: #3a2e20;--ink: #f0e8da;--dim: #b29a7c;--accent: #e0a23a;--red: #d8443a;--red2: #f06a5e;--black: #2a2a2e;--black2: #4a4a52;--sq-light: #e8d3a8;--sq-dark: #7a4d2e}*{box-sizing:border-box}html,body{margin:0;height:100%}body{background:radial-gradient(1000px 600px at 50% -8%,#221a10,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:28px;letter-spacing:4px;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: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:7px 14px;font:600 13px system-ui;cursor:pointer}.seg button.active{background:var(--accent);color:#2a1c06}.btn{background:var(--panel);border:1px solid var(--line);color:var(--ink);padding:8px 16px;border-radius:999px;font:700 13px system-ui;cursor:pointer}.btn:hover{border-color:var(--accent)}.status{text-align:center;min-height:22px;margin:6px 0;font-weight:600}.status .red-t{color:var(--red2)}.status .black-t{color:#cfd0d8}.stage{position:relative;display:flex;justify-content:center}canvas{width:100%;max-width:520px;height:auto;display:block;border-radius:8px;box-shadow:0 12px 34px #0000008c;touch-action:none}.overlay{position:absolute;inset:0;display:flex;align-items:center;justify-content:center;background:#080603b8;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:340px}.card h2{margin:0 0 6px;font-size:24px}.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:12.5px;margin-top:10px}