:root{--board-bg: #006A4E;--square-border: #004D38;--piece-shadow: rgba(0, 0, 0, .3);--highlight-color: rgba(255, 255, 255, .3);--text-color: #333;--bg-color: #f4f4f4;--button-bg: #3498db;--button-hover-bg: #2980b9;--ai-thinking-color: rgba(231, 76, 60, .7)}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Oxygen,Ubuntu,Cantarell,Open Sans,Helvetica Neue,sans-serif;display:flex;flex-direction:column;align-items:center;justify-content:center;min-height:100vh;margin:0;background-color:var(--bg-color);color:var(--text-color);padding:10px;box-sizing:border-box}.game-container{display:flex;flex-direction:column;align-items:center;gap:15px;width:100%;max-width:500px}h1{color:var(--text-color);margin-bottom:0}.mode-selector{display:flex;gap:10px;margin:10px 0}.mode-button{padding:8px 15px;font-size:.9rem;cursor:pointer;border:2px solid var(--button-bg);background-color:#fff;color:var(--button-bg);border-radius:20px;transition:all .3s}.mode-button.active{background-color:var(--button-bg);color:#fff;border-color:var(--button-bg);transform:translateY(-2px);box-shadow:0 4px 6px #0000001a}.mode-button{display:flex;align-items:center;justify-content:center;gap:8px}.mode-button svg{width:20px;height:20px}.mode-button:hover{background-color:#f0f0f0}.mode-button.active:hover{background-color:var(--button-hover-bg);border-color:var(--button-hover-bg)}.info-panel{display:flex;justify-content:space-between;align-items:center;width:100%;padding:15px 25px;background-color:var(--board-bg);border:2px solid var(--square-border);border-radius:12px;box-shadow:0 4px 6px #0000004d;box-sizing:border-box;color:#fff;margin-bottom:10px}.score-box,.turn-box{display:flex;align-items:center;gap:12px;font-size:1.1rem;font-weight:600;background-color:#0003;padding:8px 16px;border-radius:20px;border:1px solid rgba(255,255,255,.1)}.info-panel .piece{width:24px;height:24px;box-shadow:0 2px 4px #0006;border:1px solid rgba(255,255,255,.2)}#game-board{display:grid;border:8px solid #004D38;background-color:var(--board-bg);width:90vw;height:90vw;max-width:480px;max-height:480px;box-shadow:0 10px 20px #0006,inset 2px 2px 5px #ffffff1a,inset -2px -2px 5px #0003;border-radius:8px;position:relative;padding:5px}.square{width:100%;height:100%;border:1px solid rgba(0,0,0,.1);box-sizing:border-box;display:flex;justify-content:center;align-items:center;cursor:pointer;position:relative;background-color:var(--board-bg);box-shadow:inset 2px 2px 4px #00000040,inset -1px -1px 3px #ffffff1a}.piece{width:85%;height:85%;border-radius:50%;box-shadow:inset 0 2px 4px var(--piece-shadow),0 2px 3px var(--piece-shadow)}.piece.black{background-color:#111}.piece.white{background-color:#fff}.valid-move-hint{position:absolute;width:50%;height:50%;background-color:var(--highlight-color);border-radius:50%;pointer-events:none;animation:pulse 1.5s infinite}@keyframes pulse{0%{transform:scale(.9);opacity:.5}50%{transform:scale(1.1);opacity:.8}to{transform:scale(.9);opacity:.5}}#message-overlay{position:absolute;top:0;left:0;right:0;bottom:0;background-color:var(--ai-thinking-color);color:#fff;display:flex;justify-content:center;align-items:center;font-size:1.8rem;font-weight:700;text-align:center;z-index:100;border-radius:5px}#reset-button{padding:12px 25px;font-size:1rem;cursor:pointer;border:none;background-color:var(--button-bg);color:#fff;border-radius:5px;transition:background-color .3s,transform .1s}#reset-button:hover{background-color:var(--button-hover-bg)}#reset-button:active{transform:scale(.98)}#congrats-modal{position:fixed;top:50%;left:50%;transform:translate(-50%,-50%);background:#fffffff2;padding:40px;border-radius:20px;box-shadow:0 10px 25px #0003;text-align:center;z-index:1000;display:none;-webkit-backdrop-filter:blur(5px);backdrop-filter:blur(5px);border:2px solid #ffb7b2;width:300px}#congrats-modal h2{color:#ff69b4;font-size:2rem;margin:0 0 10px}#congrats-modal p{font-size:1.2rem;color:#333;margin:10px 0 20px}#congrats-modal button{background-color:#ff69b4;border:none;color:#fff;padding:10px 20px;border-radius:25px;font-size:1.1rem;cursor:pointer;transition:transform .2s}#congrats-modal button:hover{transform:scale(1.05);background-color:#ff1493}.hidden,#message-overlay.hidden{display:none!important}