:root{--bg-primary: #1a1a2e;--bg-secondary: #16213e;--bg-tertiary: #0f3460;--bg-hover: #252545;--text-primary: #ffffff;--text-secondary: #a0a0a0;--text-muted: #666666;--accent: #e94560;--accent-hover: #ff6b6b;--border: #333355;--success: #4caf50;--warning: #ff9800;--error: #f44336}*{box-sizing:border-box}body{margin:0;padding:0;background-color:var(--bg-primary);color:var(--text-primary);font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,sans-serif}.app{display:flex;min-height:100vh;padding:20px;gap:20px}.left-panel,.right-panel{flex:0 0 250px;display:flex;flex-direction:column;gap:16px}.main-panel{flex:1;display:flex;flex-direction:column;align-items:center;gap:16px}.timer,.captured-pieces,.settings-panel,.move-history,.chat-panel{background-color:var(--bg-secondary);border-radius:8px;padding:16px;border:1px solid var(--border)}.timer h3,.captured-pieces h3,.settings-panel h3,.move-history h3,.chat-panel h3{margin:0 0 12px;font-size:16px;color:var(--text-primary);border-bottom:1px solid var(--border);padding-bottom:8px}.timer-display{display:flex;align-items:center;justify-content:center;gap:12px}.time-box{text-align:center;padding:12px 16px;background-color:var(--bg-tertiary);border-radius:6px;min-width:80px}.time-box.active{border:2px solid var(--accent)}.time-box .label{font-size:12px;color:var(--text-secondary);display:block;margin-bottom:4px}.time-box .time{font-size:20px;font-weight:700;font-family:SF Mono,monospace}.time-separator{color:var(--text-secondary);font-weight:700}.captured-row{margin-bottom:8px}.captured-row .label{font-size:12px;color:var(--text-secondary);margin-right:8px}.captured-piece{font-size:18px;margin-right:2px}.setting-row{margin-bottom:12px}.setting-row label{display:block;font-size:12px;color:var(--text-secondary);margin-bottom:4px}.setting-row select,.setting-row input[type=text],.setting-row 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1fr;gap:8px;padding:8px;background-color:var(--bg-tertiary);border-radius:4px;margin-bottom:4px;font-weight:700;font-size:12px;color:var(--text-secondary)}.move-row{display:grid;grid-template-columns:30px 1fr 1fr;gap:8px;padding:6px 8px;border-bottom:1px solid var(--border)}.move-row:hover{background-color:var(--bg-hover)}.move-number{color:var(--text-muted);font-size:12px}.move-san{background:none;border:none;color:var(--text-primary);cursor:pointer;text-align:left;font-size:14px}.move-san:hover{color:var(--accent)}.no-moves{text-align:center;color:var(--text-muted);padding:20px;font-size:14px}.chat-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:12px}.chat-header h3{margin:0;border:none;padding:0}.chat-actions{display:flex;gap:8px}.chat-actions button{padding:6px 12px;background-color:var(--bg-tertiary);border:1px solid var(--border);border-radius:4px;color:var(--text-primary);font-size:12px;cursor:pointer}.chat-actions button:hover{background-color:var(--accent);border-color:var(--accent)}.chat-actions button:disabled{opacity:.5;cursor:not-allowed}.chat-messages{max-height:400px;overflow-y:auto;display:flex;flex-direction:column;gap:8px}.message{padding:10px 12px;border-radius:8px;font-size:14px;line-height:1.5}.message.ai{background-color:var(--bg-tertiary);align-self:flex-start;max-width:90%}.message.user{background-color:var(--accent);align-self:flex-end;max-width:90%}.message.system{background-color:var(--bg-hover);border:1px dashed var(--border);align-self:center;font-size:12px;color:var(--text-secondary)}.message.loading{text-align:center;color:var(--text-secondary)}.message-time{font-size:10px;color:var(--text-muted);margin-top:4px}.no-messages{text-align:center;color:var(--text-muted);padding:40px 20px;font-size:14px}.board-container{position:relative;display:flex;flex-direction:column;align-items:center;width:100%;touch-action:none;-webkit-touch-callout:none;-webkit-user-select:none;user-select:none}.board-header{display:flex;justify-content:space-between;width:100%;max-width:min(100%,560px);margin-bottom:12px;padding:0 8px}.player-info{display:flex;align-items:center;gap:8px}.player-label{font-size:14px;color:var(--text-secondary)}.turn-indicator{font-size:12px;color:var(--accent)}.chessboard-wrapper{border-radius:4px;overflow:hidden;width:100%;max-width:min(100vw - 40px,560px);aspect-ratio:1;touch-action:none}.chessboard-wrapper>div{width:100%!important;height:100%!important;touch-action:none!important}.chessboard-wrapper [class*=board]{width:100%!important;height:100%!important;touch-action:none!important}.chessboard-wrapper [class*=piece]{touch-action:none!important;-webkit-touch-callout:none!important;-webkit-user-select:none!important;user-select:none!important}.thinking-overlay{position:absolute;top:50%;left:50%;transform:translate(-50%,-50%);background-color:#000c;padding:16px 24px;border-radius:8px;z-index:10;font-size:16px;color:var(--text-primary)}.game-result{position:absolute;top:50%;left:50%;transform:translate(-50%,-50%);background-color:var(--bg-secondary);border:2px solid var(--accent);padding:24px 32px;border-radius:12px;z-index:20;text-align:center}.game-result h3{margin:0 0 16px;font-size:20px;color:var(--text-primary)}.game-result button{padding:12px 24px;background-color:var(--accent);border:none;border-radius:6px;color:#fff;font-size:16px;cursor:pointer;transition:background-color .2s;margin:0 8px}.game-result button:hover{background-color:var(--accent-hover)}.start-overlay{position:absolute;top:50%;left:50%;transform:translate(-50%,-50%);z-index:10}.start-overlay button{padding:16px 32px;background-color:var(--accent);border:none;border-radius:8px;color:#fff;font-size:18px;cursor:pointer}.game-controls{display:flex;gap:8px;margin-top:12px;justify-content:center}.control-button{padding:8px 16px;border-radius:6px;font-size:14px;cursor:pointer;transition:all .2s;min-width:100px}.control-button.primary{background-color:var(--accent);border:none;color:#fff}.control-button.primary:hover{background-color:var(--accent-hover)}.control-button.secondary{background-color:transparent;border:1px solid var(--border);color:var(--text-secondary);font-size:13px}.control-button.secondary:hover{background-color:var(--bg-hover);color:var(--text-primary)}.tab-navigation{display:flex;justify-content:space-around;align-items:center;background-color:var(--bg-secondary);border-top:1px solid var(--border);padding:8px 0;position:fixed;bottom:0;left:0;right:0;z-index:100}.tab-button{display:flex;flex-direction:column;align-items:center;gap:4px;padding:8px 16px;background:none;border:none;color:var(--text-secondary);cursor:pointer;transition:color .2s}.tab-button.active{color:var(--accent)}.tab-icon{font-size:20px}.tab-label{font-size:12px}.mobile-layout{display:flex;flex-direction:column;min-height:100vh;padding-bottom:70px}.mobile-content{flex:1;padding:12px}.panel-section{padding:16px}@media (max-width: 900px){.app{flex-direction:column;padding:0;gap:0}.left-panel,.right-panel{display:none}.main-panel{width:100%;padding:8px}.chessboard-wrapper{width:100%;max-width:100%}.board-header{max-width:100%}}.evaluation-bar{width:100%;max-width:min(100vw - 40px,560px);margin-bottom:8px}.eval-bar-container{position:relative;height:20px;background:var(--bg-tertiary);border-radius:4px;overflow:hidden;border:1px solid var(--border);display:flex}.eval-bar-black{height:100%;background:linear-gradient(to right,#1a1a1a,#444);transition:width .3s ease}.eval-bar-white{height:100%;background:linear-gradient(to right,#ddd,#fff);transition:width .3s ease}.eval-bar-center{position:absolute;left:50%;top:0;bottom:0;width:2px;background:var(--accent);transform:translate(-50%);z-index:10}.eval-text{display:flex;justify-content:space-between;align-items:center;margin-top:6px;font-size:13px;color:var(--text-secondary)}.eval-text .active{font-weight:700}.eval-text .active.white{color:#fff}.eval-text .active.black{color:#888}.eval-description{text-align:center;flex:1}.context-menu-overlay{position:fixed;top:0;left:0;right:0;bottom:0;background:#00000080;display:flex;align-items:center;justify-content:center;z-index:200}.context-menu{background:var(--bg-secondary);border-radius:12px;padding:8px;min-width:200px;border:1px solid var(--border)}.context-menu-item{display:block;width:100%;padding:12px 16px;text-align:left;background:none;border:none;color:var(--text-primary);font-size:16px;cursor:pointer;border-radius:8px;transition:background .2s}.context-menu-item:hover:not(:disabled){background:var(--bg-hover)}.context-menu-item:disabled{opacity:.5;cursor:not-allowed}.context-menu-item.cancel{color:var(--text-secondary);border-top:1px solid var(--border);margin-top:8px;padding-top:16px}.move-hint-overlay{position:absolute;top:0;left:0;width:100%;height:100%;pointer-events:none;z-index:5}.opening-display{text-align:center;padding:8px;background:var(--bg-tertiary);border-radius:4px;margin-bottom:8px;font-size:14px}.opening-label{color:var(--text-secondary);margin-right:8px}.opening-name{color:var(--accent);font-weight:500}.opening-badge{background:var(--bg-tertiary);border-radius:8px;padding:8px 12px;margin-bottom:8px;border:1px solid var(--border);cursor:pointer;transition:all .2s}.opening-badge:hover{border-color:var(--accent)}.opening-header{display:flex;align-items:center;gap:8px;font-size:14px}.opening-eco{color:var(--accent);font-weight:700;font-family:monospace}.opening-toggle{color:var(--text-secondary);font-size:12px}.deviation-warning{color:#ff9800;font-size:13px;padding:4px 0}.opening-details{margin-top:8px;padding-top:8px;border-top:1px solid var(--border)}.opening-popularity{color:gold;font-size:14px;margin-bottom:8px}.opening-ideas{margin-bottom:8px}.idea-item{font-size:12px;color:var(--text-secondary);margin-bottom:4px}.suggested-moves{display:flex;gap:8px;align-items:center;font-size:12px}.suggested-label{color:var(--text-muted)}.suggested-move{background:var(--bg-hover);padding:2px 6px;border-radius:4px;color:var(--text-primary)}.deviation-alert{position:absolute;top:60px;left:50%;transform:translate(-50%);z-index:50;animation:slideDown .3s ease}@keyframes slideDown{0%{opacity:0;transform:translate(-50%) translateY(-20px)}to{opacity:1;transform:translate(-50%) translateY(0)}}.deviation-content{display:flex;align-items:center;gap:8px;background:#ff9800e6;color:#000;padding:8px 16px;border-radius:20px;font-size:13px;box-shadow:0 4px 12px #0000004d}.deviation-close{background:none;border:none;font-size:18px;cursor:pointer;color:#000;padding:0 4px}.analysis-overlay{position:fixed;top:0;left:0;right:0;bottom:0;background:#000c;display:flex;align-items:center;justify-content:center;z-index:300}.analysis-panel{background:var(--bg-secondary);border-radius:12px;padding:24px;max-width:400px;width:90%;max-height:80vh;overflow-y:auto}.analysis-panel h2{margin:0 0 16px;text-align:center}.accuracy-score{display:flex;flex-direction:column;align-items:center;margin-bottom:24px}.score-circle{width:80px;height:80px;border-radius:50%;background:var(--accent);display:flex;align-items:center;justify-content:center;font-size:24px;font-weight:700;margin-bottom:8px}.mistakes-section h3{margin-bottom:12px}.mistakes-list{list-style:none;padding:0;margin:0}.mistake-item{display:flex;flex-direction:column;gap:4px;padding:12px;background:var(--bg-tertiary);border-radius:8px;margin-bottom:8px}.mistake-item .move-number{color:var(--text-muted)}.mistake-item .move-san{font-weight:700;color:var(--accent)}.mistake-desc{font-size:14px;color:var(--text-secondary)}.close-btn{width:100%;padding:12px;margin-top:16px;background:var(--bg-tertiary);border:1px solid var(--border);border-radius:8px;color:var(--text-primary);cursor:pointer}.close-btn:hover{background:var(--bg-hover)}.opening-study-panel{padding:16px;max-width:800px;margin:0 auto}.study-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:16px}.study-header h2{margin:0}.study-tabs{display:flex;gap:8px}.study-tabs button{padding:8px 16px;background:var(--bg-tertiary);border:1px solid var(--border);border-radius:4px;color:var(--text-secondary);cursor:pointer}.study-tabs button.active{background:var(--accent);color:#fff;border-color:var(--accent)}.search-bar{margin-bottom:12px}.search-bar input{width:100%;padding:12px;background:var(--bg-tertiary);border:1px solid var(--border);border-radius:8px;color:var(--text-primary);font-size:16px}.sort-bar{display:flex;align-items:center;gap:12px;margin-bottom:16px;padding:8px 12px;background:var(--bg-tertiary);border-radius:6px}.sort-bar label{color:var(--text-secondary);font-size:14px}.sort-bar select{padding:6px 12px;background:var(--bg-secondary);border:1px solid var(--border);border-radius:4px;color:var(--text-primary);font-size:14px;cursor:pointer}.study-content{display:grid;grid-template-columns:1fr 2fr;gap:16px}@media (max-width: 600px){.study-content{grid-template-columns:1fr}}.opening-tree{max-height:400px;overflow-y:auto}.tree-category{margin-bottom:12px}.tree-category-title{font-size:14px;color:var(--accent);margin-bottom:4px}.tree-items{display:flex;flex-direction:column;gap:2px}.tree-item{display:flex;align-items:center;gap:8px;padding:6px 8px;background:var(--bg-tertiary);border:none;border-radius:4px;cursor:pointer;text-align:left}.tree-item:hover,.tree-item.selected{background:var(--bg-hover)}.tree-eco{font-family:monospace;font-size:12px;color:var(--accent);min-width:36px}.tree-name{flex:1;font-size:13px}.tree-pop{font-size:10px;color:gold}.opening-detail{background:var(--bg-tertiary);border-radius:8px;padding:16px}.detail-header{margin-bottom:12px}.detail-header h3{margin:0 0 8px}.detail-meta{display:flex;gap:16px;font-size:14px}.detail-meta .popularity{color:gold}.detail-meta .difficulty{color:#4caf50}.detail-meta .eval{color:var(--text-secondary)}.detail-moves{font-family:monospace;font-size:13px;color:var(--text-secondary);background:var(--bg-secondary);padding:8px;border-radius:4px;margin-bottom:12px;overflow-wrap:break-word}.detail-actions{margin-bottom:16px}.practice-btn{width:100%;padding:12px;background:var(--accent);border:none;border-radius:6px;color:#fff;font-size:14px;cursor:pointer;transition:background-color .2s}.practice-btn:hover{background:var(--accent-hover)}.detail-section{margin-bottom:16px}.detail-section h4{margin:0 0 8px;color:var(--accent)}.detail-section ul{margin:0;padding-left:16px}.detail-section li{margin-bottom:4px;color:var(--text-secondary)}.variation{margin-bottom:12px;padding:8px;background:var(--bg-secondary);border-radius:4px}.var-name{font-weight:700;color:var(--text-primary);margin-bottom:4px}.var-moves{font-family:monospace;font-size:12px;color:var(--text-muted);margin-bottom:4px}.var-desc{font-size:12px;color:var(--text-secondary)}.detail-section.traps h4{color:#ff9800}.trap{margin-bottom:12px;padding:8px;background:#ff98001a;border:1px solid #ff9800;border-radius:4px}.trap-name{font-weight:700;color:#ff9800}.trap-seq{font-family:monospace;font-size:12px;color:var(--text-muted);margin:4px 0}.trap-explain{font-size:12px;color:var(--text-secondary)}.loading-overlay{position:fixed;top:0;left:0;right:0;bottom:0;background:#000000d9;display:flex;align-items:center;justify-content:center;z-index:1000}.loading-content{background:var(--bg-secondary);border-radius:12px;padding:32px 48px;text-align:center;border:1px solid var(--border);box-shadow:0 8px 32px #00000080;max-width:400px;width:90%}.loading-spinner{width:48px;height:48px;border:4px solid var(--bg-tertiary);border-top-color:var(--accent);border-radius:50%;animation:spin 1s linear infinite;margin:0 auto 20px}@keyframes spin{to{transform:rotate(360deg)}}.loading-content h3{margin:0 0 12px;font-size:18px;color:var(--text-primary)}.loading-progress-text{font-size:24px;font-weight:700;color:var(--accent);margin-bottom:12px}.loading-bar-container{height:12px;background:var(--bg-tertiary);border-radius:6px;overflow:hidden;margin-bottom:16px;border:1px solid var(--border)}.loading-bar-fill{height:100%;background:linear-gradient(to right,var(--accent),var(--accent-hover));transition:width .3s ease;border-radius:4px}.loading-message{font-size:14px;color:var(--text-primary);margin:0 0 8px}.loading-hint{font-size:12px;color:var(--text-secondary);margin:0}.loading-ready-overlay{position:fixed;top:0;left:0;right:0;bottom:0;background:#0009;display:flex;align-items:center;justify-content:center;z-index:1000;animation:fadeOut 1.5s ease-in-out forwards}@keyframes fadeOut{0%{opacity:1}70%{opacity:1}to{opacity:0}}.loading-ready-content{background:var(--success);border-radius:50px;padding:24px 48px;display:flex;align-items:center;gap:12px;box-shadow:0 8px 32px #4caf5066;animation:scaleIn .3s ease-out}@keyframes scaleIn{0%{transform:scale(.5);opacity:0}to{transform:scale(1);opacity:1}}.ready-icon{font-size:28px;color:#fff;font-weight:700}.ready-text{font-size:24px;color:#fff;font-weight:700}.opening-suggestions{width:100%;max-width:min(100vw - 40px,560px);margin-top:12px;background:var(--bg-secondary);border-radius:8px;padding:12px;border:1px solid var(--border)}.suggestions-header{display:flex;align-items:center;gap:8px;cursor:pointer;padding-bottom:8px;border-bottom:1px solid var(--border)}.suggestions-header:hover .opening-name{color:var(--accent-hover)}.opening-eco{font-family:monospace;font-size:12px;color:var(--accent);font-weight:700}.opening-name{flex:1;color:var(--accent);font-weight:500}.deviation-badge{font-size:11px;color:#ff9800;background:#ff98001a;padding:2px 6px;border-radius:4px}.expand-icon{font-size:14px;opacity:.7}.suggestions-list{display:flex;flex-wrap:wrap;align-items:center;gap:8px;margin-top:10px}.suggestions-label{font-size:12px;color:var(--text-secondary)}.suggestion-item{display:flex;align-items:center;gap:6px;padding:4px 10px;background:var(--bg-tertiary);border:1px solid var(--border);border-radius:16px;cursor:pointer;transition:all .2s}.suggestion-item:hover{background:var(--bg-hover);border-color:var(--accent)}.suggestion-move{font-family:monospace;font-weight:700;color:var(--text-primary);font-size:13px}.suggestion-name{font-size:11px;color:var(--text-secondary);max-width:80px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.deviation-note{margin-top:10px;padding:8px;background:#ff98001a;border-left:3px solid #ff9800;border-radius:4px;font-size:12px;color:var(--text-secondary)}.suggestion-modal-overlay{position:fixed;top:0;left:0;right:0;bottom:0;background:#000000b3;display:flex;align-items:center;justify-content:center;z-index:300;padding:20px}.suggestion-modal{background:var(--bg-secondary);border-radius:12px;max-width:480px;width:100%;max-height:80vh;overflow-y:auto;border:1px solid var(--border)}.modal-header{display:flex;justify-content:space-between;align-items:center;padding:16px;border-bottom:1px solid var(--border)}.modal-header h3{margin:0;font-size:16px}.modal-close{background:none;border:none;color:var(--text-secondary);font-size:24px;cursor:pointer;padding:0;width:32px;height:32px;display:flex;align-items:center;justify-content:center;border-radius:50%;transition:all .2s}.modal-close:hover{background:var(--bg-hover);color:var(--text-primary)}.modal-content{padding:16px}.modal-section{margin-bottom:20px}.modal-section h4{margin:0 0 12px;color:var(--accent);font-size:15px}.modal-section ul{margin:0;padding-left:20px}.modal-section li{margin-bottom:8px;color:var(--text-secondary);line-height:1.5}.move-sequence{font-family:monospace;font-size:14px;background:var(--bg-tertiary);padding:12px;border-radius:6px;margin-bottom:12px;color:var(--text-primary);line-height:1.6}.description{color:var(--text-secondary);line-height:1.6;margin:0}.variation-preview{margin-bottom:12px;padding:10px;background:var(--bg-tertiary);border-radius:6px}.variation-preview .var-name{font-weight:500;color:var(--text-primary);margin-bottom:4px;font-size:13px}.variation-preview .var-moves{font-family:monospace;font-size:12px;color:var(--text-muted)}