:root{--bg: #0d1117;--panel: #161b22;--border: #30363d;--text: #e6edf3;--muted: #8b949e;--accent: #58a6ff;--good: #3fb950}*{box-sizing:border-box}html,body{margin:0;height:100%;background:#05070a;color:var(--text);font-family:Segoe UI,Yu Gothic UI,system-ui,sans-serif;display:flex;align-items:center;justify-content:center}#app{position:relative;width:960px;height:640px;box-shadow:0 0 60px #000000b3}#game{position:absolute;top:0;right:0;bottom:0;left:0;width:100%;height:100%;border-radius:8px}.overlay{position:absolute;top:0;right:0;bottom:0;left:0;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:14px;background:#0d1117f0;border-radius:8px;text-align:center;padding:28px}.overlay.hidden{display:none}h1{font-size:36px;margin:0}h2{font-size:28px;margin:0 0 8px}.tagline{color:var(--muted);margin:0}button{font:inherit;cursor:pointer;background:var(--panel);color:var(--text);border:1px solid var(--border);border-radius:8px;padding:14px 18px;transition:border-color .12s,transform .06s,background .12s,color .12s}button:hover{border-color:var(--accent)}button:active{transform:translateY(1px)}button.ghost{background:transparent}.locale-switch{position:absolute;top:16px;right:16px;padding:7px 14px;font-size:14px;color:var(--muted);border-radius:999px}.locale-switch:hover{color:var(--text)}.tabs{display:flex;gap:8px}.tab{padding:9px 18px;background:transparent;color:var(--muted);font-weight:600}.tab.active{border-color:var(--accent);color:var(--accent)}.tab-panel{display:flex;flex-direction:column;align-items:center;gap:14px}.tab-panel.hidden{display:none}.mode-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:12px}.mode-grid button{position:relative;display:flex;flex-direction:column;align-items:center;gap:6px;width:168px;font-size:17px;font-weight:600}.mode-grid button .num{position:absolute;top:6px;left:8px;font-size:12px;font-weight:700;color:var(--muted);border:1px solid var(--border);border-radius:4px;padding:0 5px}.mode-grid button .sample{font-size:13px;font-weight:400;color:var(--muted)}.mode-grid button .rec{font-size:12px;font-weight:600;color:var(--good);min-height:15px}.trans-picker{display:flex;align-items:flex-end;gap:14px}.trans-picker label{display:flex;flex-direction:column;gap:6px;color:var(--muted);font-size:14px;text-align:left}.trans-picker select{-webkit-appearance:none;-moz-appearance:none;appearance:none;font:inherit;background-color:var(--panel);color:var(--text);border:1px solid var(--border);border-radius:8px;padding:10px 34px 10px 12px;cursor:pointer;background-image:url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='10' height='6'><path d='M0 0l5 6 5-6z' fill='%238b949e'/></svg>");background-repeat:no-repeat;background-position:right 12px center}.trans-picker select:hover{border-color:var(--accent)}.trans-picker .arrow{font-size:24px;color:var(--accent);padding-bottom:8px}.ja-form{display:flex;flex-direction:column;gap:8px;align-items:flex-start;background:var(--panel);border:1px solid var(--border);border-radius:8px;padding:12px 16px}.ja-form.hidden{display:none}.rec-line{color:var(--good);font-size:13px;font-weight:600;margin:0;min-height:16px}.segmented{display:flex;width:100%;border:1px solid var(--border);border-radius:8px;overflow:hidden}.segmented button{flex:1;padding:9px 14px;border:none;border-radius:0;background:var(--panel);color:var(--muted);font-size:14px}.segmented button+button{border-left:1px solid var(--border)}.segmented button:hover{color:var(--text)}.segmented button.selected{background:var(--accent);color:#0d1117;font-weight:600}.option-row{display:flex;flex-direction:column;gap:8px;align-items:flex-start;background:var(--panel);border:1px solid var(--border);border-radius:8px;padding:14px 18px;width:440px}.option-name{font-weight:600}.row{display:flex;gap:12px}.result{font-size:18px;margin:2px}.result strong{color:var(--accent)}.record{font-size:18px;font-weight:700;color:var(--good);margin:0}.record.hidden{display:none}.hint{color:var(--muted);font-size:13px;margin:6px 0 0}