:root{--bg: #0b1411;--panel: #14201b;--line: #243a31;--ink: #eaf3ee;--dim: #93b3a5;--accent: #4cc9a0;--accent2: #e8794c}*{box-sizing:border-box}html,body{margin:0;height:100%}body{background:radial-gradient(900px 560px at 50% -8%,#13231c,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:540px;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}.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 12px;font:600 13px system-ui;cursor:pointer}.seg button.active{background:var(--accent);color:#05231a}.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:#05231a;border-color:var(--accent)}.score{display:flex;gap:14px;justify-content:center;align-items:center;margin:8px 0;font-weight:700;font-size:15px}.score .chip{display:inline-block;width:13px;height:13px;border-radius:3px;vertical-align:middle;margin-right:5px}.score .c1{background:var(--accent)}.score .c2{background:var(--accent2)}.score .open{color:var(--dim);font-weight:600;font-size:13px}.score .turn{color:var(--ink);text-shadow:0 0 10px rgba(76,201,160,.5)}.status{text-align:center;min-height:20px;color:var(--dim);font-size:13px;font-weight:600}.stage{position:relative;display:flex;justify-content:center}canvas{width:100%;max-width:480px;height:auto;display:block;border-radius:10px;box-shadow:0 12px 34px #0000008c;touch-action:none;cursor:pointer;background:#0e1a16}.overlay{position:absolute;inset:0;display:flex;align-items:center;justify-content:center;background:#060c09bd;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:10px;line-height:1.5}