.piece{width:56px;height:56px;border-radius:50%;cursor:pointer;position:absolute;-webkit-user-select:none;user-select:none;transform:translate(-50%,-50%);transition:transform .2s,box-shadow .2s;z-index:10}.piece.selected{transform:translate(-50%,-60%) scale(1.1);box-shadow:0 10px 20px #00000080;z-index:20}.piece-inner{width:100%;height:100%;border-radius:50%;background-image:url(../piece.png);background-size:115%;background-position:center;box-shadow:2px 2px 5px #0006;display:flex;align-items:center;justify-content:center;position:relative;overflow:hidden}.piece.red .piece-text{color:#cf0000;text-shadow:0 1px 1px rgba(255,255,255,.3)}.piece.black .piece-text{color:#111;text-shadow:0 1px 1px rgba(255,255,255,.3)}.piece-text{font-family:KaiTi,STKaiti,BiauKai,serif;font-weight:700;font-size:2.2rem;z-index:2;margin-top:-2px}.piece-shine{position:absolute;top:0;left:0;width:100%;height:50%;background:linear-gradient(to bottom,rgba(255,255,255,.2),transparent);border-radius:50% 50% 0 0;pointer-events:none}.board-container{position:relative;background-color:transparent;margin:0 auto;-webkit-user-select:none;user-select:none}.board-grid{position:absolute;top:0;left:0;pointer-events:none}.grid-line{stroke:#4d2600;stroke-width:2;stroke-linecap:round}.river-text{font-family:KaiTi,STKaiti,serif;font-size:32px;fill:#4d2600;text-anchor:middle;dominant-baseline:middle;font-weight:700;opacity:.8}.intersection-target{position:absolute;width:40px;height:40px;transform:translate(-50%,-50%);cursor:pointer;z-index:5}.valid-move-indicator{position:absolute;width:20px;height:20px;background-color:#00c80099;border-radius:50%;transform:translate(-50%,-50%);z-index:15;pointer-events:auto;cursor:pointer;box-shadow:0 0 5px #00ff0080}.valid-move-indicator:hover{background-color:#00e600cc;transform:translate(-50%,-50%) scale(1.2)}:root{--wood-primary: #e6b87d;--wood-dark: #8b5a2b;--bg-color: #2b1d12}body{margin:0;background-color:var(--bg-color);color:#eee;font-family:Inter,sans-serif;display:flex;justify-content:center;min-height:100vh}.app-container{display:flex;flex-direction:column;align-items:center;padding:20px;width:100%}.game-wrapper{display:flex;flex-direction:column;align-items:center;gap:20px;max-width:600px;width:100%}.game-header{text-align:center;margin-bottom:10px}h1{margin:0 0 10px;font-family:KaiTi,serif;color:var(--wood-primary);text-shadow:0 2px 4px rgba(0,0,0,.5)}.turn-indicator{font-size:1.2rem;background:#0006;padding:5px 15px;border-radius:20px;display:inline-block}.turn-indicator span.red{color:#ff4d4d;font-weight:700}.turn-indicator span.black{color:#aaa;font-weight:700}.status-message{color:#fc0;font-weight:700;font-size:1.5rem;margin-top:10px;animation:pulse 1s infinite}.board-area{position:relative;background-image:url(../board.png);background-size:100% 100%;background-position:center;background-repeat:no-repeat;border-radius:4px;box-shadow:0 10px 30px #0009}.controls{display:flex;gap:15px;margin-top:20px;flex-wrap:wrap;justify-content:center}button{background:linear-gradient(to bottom,#8b5a2b,#5c3a1e);color:#fff;border:1px solid #3e2613;padding:10px 24px;border-radius:6px;font-size:1rem;cursor:pointer;font-family:inherit;box-shadow:0 4px 6px #0000004d;transition:all .2s;min-width:100px}button:hover:not(:disabled){transform:translateY(-2px);box-shadow:0 6px 8px #0006;filter:brightness(1.1)}button:active:not(:disabled){transform:translateY(0);box-shadow:0 2px 4px #0000004d}button:disabled{opacity:.5;cursor:not-allowed;filter:grayscale(1)}@keyframes pulse{0%{transform:scale(1)}50%{transform:scale(1.05)}to{transform:scale(1)}}.difficulty-selector{display:flex;align-items:center;gap:8px;background:#0000004d;padding:6px 12px;border-radius:8px}.difficulty-selector span{color:#ccc;font-size:.9rem;margin-right:4px}.difficulty-selector button{min-width:60px;padding:6px 12px;font-size:.85rem}.difficulty-selector button.active{background:linear-gradient(to bottom,#d4a44a,#8b5a2b);border-color:#d4a44a;box-shadow:0 0 10px #d4a44a80}.mute-button,.lang-toggle{min-width:50px;padding:8px 12px;font-size:1.1rem}.lang-toggle{background:linear-gradient(to bottom,#d4a44a,#8b5a2b);border-color:#5c3a1e;min-width:80px;font-weight:700}.rules-link:hover{background:#d4a44a40!important;transform:translateY(-2px);box-shadow:0 4px 8px #0000004d}.rules-link:active{transform:translateY(0)}