*{box-sizing:border-box;margin:0;padding:0}body{color:#e0e0e0;background:linear-gradient(135deg,#1a1a2e 0%,#16213e 50%,#0f3460 100%);justify-content:center;align-items:center;min-height:100vh;font-family:Segoe UI,system-ui,-apple-system,sans-serif;display:flex}#root{justify-content:center;align-items:center;width:100%;min-height:100vh;display:flex}.game-container{flex-direction:column;align-items:center;gap:20px;padding:24px;display:flex}.title{letter-spacing:8px;color:#fff;text-shadow:0 2px 10px #0000004d;margin:0;font-size:36px;font-weight:700}.play-area{align-items:flex-start;gap:24px;display:flex}.mobile-bar{display:none}.side-panel{background:#ffffff0a;border:1px solid #ffffff14;border-radius:16px;flex-direction:column;gap:16px;min-width:180px;padding:20px;display:flex;box-shadow:0 8px 32px #0003}.panel-title{color:#ffffffb3;letter-spacing:2px;text-align:center;font-size:18px;font-weight:600}.player-card{background:#ffffff0a;border:2px solid #0000;border-radius:12px;align-items:center;gap:10px;padding:12px 14px;transition:all .3s;display:flex}.player-card.active{background:#64c8ff14;border-color:#64c8ff99;box-shadow:0 0 12px #64c8ff26}.player-card .stone{flex-shrink:0;width:28px;height:28px}.player-card-info{flex-direction:column;flex:1;display:flex}.player-card-name{color:#fff9;font-size:14px}.player-card .score{color:#64c8ff;font-size:22px;font-weight:700}.player-card .timer{color:#fff6;font-family:ui-monospace,Consolas,monospace;font-size:14px}.side-status{text-align:center;padding:4px 0;font-size:16px;font-weight:500}.side-panel .btn{text-align:center;width:100%}.player-info{background:#ffffff0d;border:2px solid #0000;border-radius:12px;align-items:center;gap:8px;padding:8px 14px;font-size:16px;transition:all .3s;display:flex}.player-info.active{background:#64c8ff1a;border-color:#64c8ff99;box-shadow:0 0 15px #64c8ff33}.player-info .score{text-align:center;color:#64c8ff;min-width:20px;font-size:18px;font-weight:700}.player-info .timer{color:#ffffff73;min-width:46px;font-family:ui-monospace,Consolas,monospace;font-size:13px}.player-info .stone{flex-shrink:0;width:24px;height:24px}.status-text{text-align:center;white-space:nowrap;min-width:80px;font-size:16px;font-weight:500}.winner-text{color:gold;font-weight:700;animation:1s ease-in-out infinite pulse}@keyframes pulse{0%,to{opacity:1}50%{opacity:.6}}.stone{border-radius:50%;width:30px;height:30px;transition:transform .15s}.black-stone{background:radial-gradient(circle at 35% 35%,#555,#111 60%,#000);box-shadow:2px 2px 4px #00000080}.white-stone{background:radial-gradient(circle at 35% 35%,#fff,#ddd 60%,#bbb);box-shadow:2px 2px 4px #0000004d}.stone.last-move:after{content:"";background:#f44;border-radius:50%;width:8px;height:8px;position:absolute;top:50%;left:50%;transform:translate(-50%,-50%)}.board-wrapper{background:#ffffff08;border:1px solid #ffffff14;border-radius:16px;padding:16px;box-shadow:0 8px 32px #0000004d}.board{background:#dcb35c;border-radius:4px;grid-template-rows:repeat(15,36px);grid-template-columns:repeat(15,36px);padding:1px;display:grid}.cell{cursor:pointer;background:0 0;border:none;justify-content:center;align-items:center;width:36px;height:36px;padding:3px;display:flex;position:relative}.cell:before{content:"";background:#0000004d;height:1px;position:absolute;top:50%;left:0;right:0}.cell:after{content:"";background:#0000004d;width:1px;position:absolute;top:0;bottom:0;left:50%}.cell:nth-child(15n+1):before{left:50%}.cell:nth-child(15n):before{right:50%}.cell:nth-child(-n+15):after{top:50%}.cell:nth-child(n+211):after{bottom:50%}.cell:hover:not(.has-stone):not(:disabled){background:#ffffff26}.cell .stone{z-index:1;position:relative}.cell.winning .stone{animation:.8s ease-in-out infinite alternate win-glow}@keyframes win-glow{0%{box-shadow:0 0 8px 2px #ffd70099}to{box-shadow:0 0 16px 4px #ffd700e6}}.btn{color:#e0e0e0;cursor:pointer;letter-spacing:2px;background:#ffffff14;border:2px solid #fff3;border-radius:10px;padding:8px 28px;font-size:16px;font-weight:500;transition:all .2s}.btn:hover:not(:disabled){background:#ffffff26;border-color:#fff6;transform:translateY(-1px)}.btn:disabled{opacity:.3;cursor:not-allowed}.btn-primary{color:#64c8ff;background:#64c8ff33;border-color:#64c8ff66}.btn-primary:hover:not(:disabled){background:#64c8ff4d;border-color:#64c8ff99}@media (width<=768px){.game-container{gap:12px;padding:12px}.title{letter-spacing:4px;font-size:24px}.play-area{flex-direction:column;align-items:center;width:100%}.mobile-bar{flex-direction:column;align-items:center;gap:10px;width:100%;display:flex}.mobile-players{justify-content:center;gap:12px;display:flex}.mobile-buttons{gap:12px;display:flex}.mobile-buttons .btn{text-align:center;flex:1;min-width:150px}.side-panel{display:none}.board-wrapper{padding:8px}.board{grid-template-rows:repeat(15,1fr);grid-template-columns:repeat(15,1fr);width:min(100vw - 56px,480px);height:min(100vw - 56px,480px)}.cell{width:auto;height:auto;padding:0}.cell .stone{width:70%;height:70%}.stone.last-move:after{width:6px;height:6px}}