@import"https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&display=swap";*{box-sizing:border-box;margin:0;padding:0}:root{font-family:Inter,system-ui,-apple-system,sans-serif;line-height:1.5;font-weight:400;color:#4a5568;font-synthesis:none;text-rendering:optimizeLegibility;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}body{margin:0;padding:0;min-height:100vh;background:#f7fafc}#root{min-height:100vh}button:focus,input:focus,textarea:focus,select:focus{outline:2px solid #667eea;outline-offset:2px}::-webkit-scrollbar{width:8px}::-webkit-scrollbar-track{background:#f1f1f1;border-radius:4px}::-webkit-scrollbar-thumb{background:#c1c1c1;border-radius:4px}::-webkit-scrollbar-thumb:hover{background:#a8a8a8}.cg-board square.best-move-highlight-1{background-color:#4caf5099!important;box-shadow:inset 0 0 0 3px #4caf50!important}.cg-board square.best-move-highlight-2{background-color:#2196f399!important;box-shadow:inset 0 0 0 3px #2196f3!important}.cg-board square.best-move-highlight-3{background-color:#ff980099!important;box-shadow:inset 0 0 0 3px #ff9800!important}.cg-board square.pv-highlight-1{background-color:#4caf5066!important;border:2px solid #4CAF50!important}.cg-board square.pv-highlight-2{background-color:#2196f366!important;border:2px solid #2196F3!important}.cg-board square.pv-highlight-3{background-color:#ff9800!important;border:2px solid #FF9800!important}.cg-board square.pv-highlight-4{background-color:#9c27b066!important;border:2px solid #9C27B0!important}.best-move-from{background-color:#90ee90cc!important;box-shadow:inset 0 0 0 3px #90ee90!important}.best-move-to{background-color:#006400cc!important;box-shadow:inset 0 0 0 3px #006400!important}.best-move-1.best-move-from{background-color:#90ee90cc!important;box-shadow:inset 0 0 0 3px #90ee90!important}.best-move-1.best-move-to{background-color:#006400cc!important;box-shadow:inset 0 0 0 3px #006400!important}.best-move-2.best-move-from{background-color:#ffb6c1cc!important;box-shadow:inset 0 0 0 3px #ffb6c1!important}.best-move-2.best-move-to{background-color:#8b0000cc!important;box-shadow:inset 0 0 0 3px #8b0000!important}.best-move-3.best-move-from{background-color:#87ceebcc!important;box-shadow:inset 0 0 0 3px #87ceeb!important}.best-move-3.best-move-to{background-color:#000080cc!important;box-shadow:inset 0 0 0 3px navy!important}.pv-arrow-number{position:absolute;width:24px!important;height:24px!important;border-radius:50%!important;display:flex!important;align-items:center!important;justify-content:center!important;font-size:12px!important;font-weight:700!important;z-index:1001!important;pointer-events:none!important;box-shadow:0 2px 4px #0000004d!important;border:2px solid white!important;color:#fff!important}.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}.theme-switch{position:relative;display:inline-block;width:60px;height:34px}.theme-switch input{opacity:0;width:0;height:0}.slider{position:absolute;cursor:pointer;inset:0;background:linear-gradient(to right,gold,#ff8c00);transition:all .4s cubic-bezier(.23,1,.32,1);border-radius:34px;box-shadow:0 4px 15px #0003;overflow:hidden}.slider:before{position:absolute;content:"";height:26px;width:26px;left:4px;bottom:4px;background:#fff;transition:all .4s cubic-bezier(.23,1,.32,1);border-radius:50%;box-shadow:0 2px 8px #0003;display:flex;align-items:center;justify-content:center}.slider:before{background:radial-gradient(circle,gold 30%,#fff 30%);background-image:conic-gradient(from 0deg at 50% 50%,transparent 22.5deg,#FFD700 22.5deg 45deg,transparent 45deg 67.5deg,#FFD700 67.5deg 90deg,transparent 90deg 112.5deg,#FFD700 112.5deg 135deg,transparent 135deg 157.5deg,#FFD700 157.5deg 180deg,transparent 180deg 202.5deg,#FFD700 202.5deg 225deg,transparent 225deg 247.5deg,#FFD700 247.5deg 270deg,transparent 270deg 292.5deg,#FFD700 292.5deg 315deg,transparent 315deg 337.5deg,#FFD700 337.5deg 360deg);background-size:18px 18px;background-position:center;background-repeat:no-repeat;box-shadow:0 2px 8px #0003,inset 0 0 0 2px gold}input:checked+.slider{background:linear-gradient(to right,#4a5568,#2d3748)}input:checked+.slider:before{transform:translate(26px);background:#e2e8f0;background-image:radial-gradient(circle at 30% 30%,transparent 2px,#CBD5E0 2px 3px,transparent 3px),radial-gradient(circle at 70% 20%,transparent 1px,#CBD5E0 1px 2px,transparent 2px),radial-gradient(circle at 80% 60%,transparent 1px,#CBD5E0 1px 2px,transparent 2px),radial-gradient(circle at 20% 70%,transparent 1px,#CBD5E0 1px 2px,transparent 2px);background-size:8px 8px;background-position:center;box-shadow:0 2px 8px #0000004d,inset 0 0 0 2px #cbd5e0}.slider:after{content:"";position:absolute;inset:-2px;background:linear-gradient(45deg,gold,#ff8c00,gold);border-radius:36px;z-index:-1;opacity:0;transition:opacity .3s ease}input:checked+.slider:after{background:linear-gradient(45deg,#4a5568,#2d3748,#4a5568)}.theme-switch:hover .slider:after{opacity:.3}.slider.round{border-radius:34px}.slider.round:before{border-radius:50%}.theme-switch:hover .slider:before{animation:pulse 1.5s ease-in-out infinite alternate}@keyframes pulse{0%{box-shadow:0 2px 8px #0003,inset 0 0 0 2px gold}to{box-shadow:0 4px 16px #0000004d,inset 0 0 0 2px gold}}input:checked+.slider:hover:before{animation:pulseDark 1.5s ease-in-out infinite alternate}@keyframes pulseDark{0%{box-shadow:0 2px 8px #0000004d,inset 0 0 0 2px #cbd5e0}to{box-shadow:0 4px 16px #0006,inset 0 0 0 2px #cbd5e0}}.theme-switch{z-index:10}.app{min-height:100vh;background:linear-gradient(135deg,var(--bg-primary) 0%,var(--bg-secondary) 100%);font-family:Inter,system-ui,-apple-system,sans-serif;color:var(--text-primary);transition:background .3s ease,color .3s ease}.app-header{text-align:center;padding:2rem;background:var(--header-bg);color:var(--header-text);margin-bottom:2rem;box-shadow:0 4px 20px var(--shadow-primary);transition:background .3s ease,color .3s ease}.header-content{display:flex;justify-content:space-between;align-items:flex-start;max-width:1200px;margin:0 auto}.header-text{text-align:left;flex:1}.header-right{display:flex;flex-direction:column;align-items:flex-end;justify-content:flex-start;gap:.75rem}.app-header h1{margin:0;font-size:2.5rem;font-weight:700;letter-spacing:-.5px;text-shadow:0 2px 4px rgba(0,0,0,.2)}.app-header p{margin:1rem 0 0;font-size:1.1rem;opacity:.9;font-weight:300}.main-content{max-width:1800px;margin:0 auto;padding:2rem;display:grid;grid-template-columns:auto 1.5fr 1.5fr 1fr;gap:2rem;align-items:start}.board-column{background:var(--bg-tertiary);padding:10px;border-radius:15px;box-shadow:0 8px 25px var(--shadow-primary);display:flex;flex-direction:column;align-items:center;gap:1rem;transition:background .3s ease,box-shadow .3s ease}.board-section{display:flex;flex-direction:column;align-items:center}.chess-board-container{display:flex;justify-content:center;margin-bottom:1rem}.fen-display{width:100%}.fen-display label{display:block;font-weight:500;margin-bottom:.5rem;color:var(--text-secondary)}.fen-input{width:100%;padding:.75rem;border:2px solid var(--border-secondary);border-radius:8px;font-family:monospace;font-size:.9rem;background:var(--bg-secondary)}.controls-column{background:var(--bg-tertiary);padding:10px;border-radius:15px;box-shadow:0 8px 25px var(--shadow-primary);display:flex;flex-direction:column;gap:1.5rem;transition:background .3s ease,box-shadow .3s ease}.results-column{background:var(--bg-tertiary);padding:10px;border-radius:15px;box-shadow:0 8px 25px var(--shadow-primary);transition:background .3s ease,box-shadow .3s ease}.control-group{margin-bottom:1.5rem}.control-group label{display:block;font-weight:600;margin-bottom:.75rem;color:var(--text-primary);font-size:.95rem;transition:color .3s ease}.control-buttons,.navigation-controls{display:flex;gap:.75rem;flex-wrap:wrap}.btn{padding:.75rem 1rem;border:none;border-radius:8px;font-weight:500;cursor:pointer;transition:all .2s ease;display:inline-flex;align-items:center;gap:.5rem;font-size:.9rem}.btn-primary{background:var(--btn-primary-bg);color:var(--btn-primary-text);border:none;box-shadow:0 2px 8px var(--shadow-primary);transition:all .3s ease}.btn-primary:hover{background:var(--btn-primary-bg);transform:translateY(-1px);box-shadow:0 4px 12px var(--shadow-primary)}.btn-secondary{background:var(--btn-secondary-bg);color:var(--btn-secondary-text);border:1px solid var(--border-primary);box-shadow:0 1px 3px var(--shadow-primary);transition:all .3s ease}.btn-secondary:hover{background:var(--btn-secondary-bg);border-color:var(--border-primary);transform:translateY(-1px);box-shadow:0 2px 6px var(--shadow-primary)}.btn:disabled{opacity:.5;cursor:not-allowed;transform:none}.btn:disabled:hover{transform:none}.game-controls{margin-bottom:1.5rem}.fen-input-container{display:flex;gap:.5rem;margin-top:.5rem}.fen-input-field{flex:1;padding:.75rem;border:2px solid var(--border-secondary);border-radius:8px;font-family:monospace;font-size:.9rem;background:var(--bg-tertiary);color:var(--text-primary);transition:all .3s ease}.fen-input-field:focus{outline:none;border-color:#667eea;box-shadow:0 0 0 3px #667eea1a}.fen-display-field{width:100%}.boards-sidebar{background:var(--sidebar-bg);border-radius:12px;box-shadow:0 4px 20px var(--shadow-primary),0 1px 8px var(--shadow-primary);width:224px;min-width:224px;border:1px solid var(--sidebar-border);overflow:hidden}.boards-manager{border:none;border-radius:16px;overflow:hidden;background:var(--sidebar-bg);box-shadow:0 10px 30px var(--shadow-primary),0 2px 8px var(--shadow-primary);-webkit-backdrop-filter:blur(20px);backdrop-filter:blur(20px)}.boards-header{display:flex;justify-content:space-between;align-items:center;padding:4px 8px;background:var(--sidebar-header-bg);border-bottom:1px solid var(--sidebar-border);position:relative;box-shadow:inset 0 1px 0 var(--sidebar-header-shadow)}.boards-header h3{margin:0;font-size:.8rem;font-weight:600;color:var(--text-primary);letter-spacing:-.02em}.add-board-button{display:flex;align-items:center;justify-content:center;width:22px;height:22px;background:var(--btn-secondary-bg);color:var(--text-secondary);border:1px solid var(--border-primary);border-radius:3px;cursor:pointer;transition:all .2s ease;box-shadow:0 1px 3px var(--shadow-primary);position:relative;overflow:hidden}.add-board-button:before{content:"";position:absolute;top:0;left:-100%;width:100%;height:100%;background:linear-gradient(90deg,transparent,rgba(255,255,255,.3),transparent);transition:left .5s}.add-board-button:hover:before{left:100%}.add-board-button:hover{background:var(--btn-primary-bg);color:var(--btn-primary-text);transform:translateY(-1px);box-shadow:0 2px 6px var(--shadow-primary)}.boards-list{max-height:600px;overflow-y:auto;overflow-x:hidden;scrollbar-width:thin;scrollbar-color:#c4b5fd #f3e8ff;padding:3px;display:flex;flex-direction:column;gap:1px}.boards-list::-webkit-scrollbar{width:6px}.boards-list::-webkit-scrollbar-track{background:var(--scrollbar-track-bg);border-radius:3px}.boards-list::-webkit-scrollbar-thumb{background:var(--scrollbar-thumb-bg);border-radius:3px;transition:all .2s ease}.boards-list::-webkit-scrollbar-thumb:hover{background:var(--scrollbar-thumb-hover-bg)}.board-item{display:flex;align-items:center;justify-content:space-between;padding:3px 6px;border:1px solid var(--border-secondary);border-radius:3px;transition:all .2s ease;cursor:pointer;position:relative;background:var(--bg-secondary);box-shadow:0 1px 3px var(--shadow-primary);min-height:20px}.board-item:before{content:"";position:absolute;inset:0;background:linear-gradient(135deg,transparent 0%,rgba(196,181,253,.05) 100%);opacity:0;transition:opacity .3s ease;pointer-events:none}.board-item:last-child{margin-bottom:0}.board-item:hover{transform:translateY(-1px);box-shadow:0 3px 12px var(--shadow-primary);border-color:var(--border-primary);background:var(--bg-tertiary)}.board-item:hover:before{opacity:1}.board-item.active{background:var(--active-bg);border:2px solid var(--active-border);box-shadow:0 2px 8px var(--active-shadow),inset 0 1px 0 var(--active-inset-shadow);transform:translateY(-1px)}.board-item.active:before{background:linear-gradient(135deg,#a78bfa1a,#c4b5fd26);opacity:1}.board-name-section{flex:1;display:flex;align-items:center;padding-right:.25rem}.board-name{font-weight:500;color:var(--text-primary);font-size:.75rem;text-shadow:0 1px 2px var(--text-shadow);transition:all .2s ease}.board-name.clickable{cursor:pointer;border-radius:2px;padding:1px 3px;margin:-1px -3px}.board-name.clickable:hover{background-color:var(--hover-bg);color:var(--link-color);transform:scale(1.02)}.board-item.active .board-name{color:var(--active-text);font-weight:600}.board-name-input{padding:.35rem .75rem;border:2px solid #a78bfa;border-radius:8px;font-size:.9rem;font-weight:500;background:linear-gradient(135deg,#fff,#faf5ff);outline:none;width:140px;box-shadow:0 2px 8px #a78bfa26;transition:all .2s ease}.board-name-input:focus{border-color:#8b5cf6;box-shadow:0 0 0 3px #8b5cf626,0 4px 12px #a78bfa33;background:#fff}.board-actions{display:flex;gap:.125rem;opacity:0;transition:all .3s ease;transform:translate(4px)}.board-item:hover .board-actions,.board-item.active .board-actions{opacity:1;transform:translate(0)}.action-button{display:flex;align-items:center;justify-content:center;width:20px;height:20px;border:none;border-radius:4px;cursor:pointer;transition:all .2s ease;background:transparent;padding:2px}.action-button.edit{color:var(--text-secondary)}.action-button.edit:hover{color:var(--link-color);background:var(--hover-bg);transform:scale(1.1)}.action-button.confirm{color:var(--success-color)}.action-button.confirm:hover{color:var(--success-hover-color);background:var(--success-hover-bg);transform:scale(1.1)}.action-button.remove{color:var(--text-secondary)}.action-button.remove:hover{color:var(--error-color);background:var(--error-hover-bg);transform:scale(1.1)}.boards-info{padding:4px 8px;background:var(--sidebar-header-bg);text-align:center;border-top:1px solid var(--sidebar-border);position:relative}.boards-info small{color:var(--text-secondary);font-size:.65rem;font-weight:500;text-shadow:0 1px 2px var(--text-shadow)}.fen-display-field{padding:.75rem;border:2px solid #e1e8ed;border-radius:8px;font-family:monospace;font-size:.85rem;background:#f8f9fa;color:#666;margin-top:.5rem}.current-fen{margin-top:.5rem}.chess-board-container{display:flex;flex-direction:column;align-items:center;gap:1rem}.chess-board{position:relative}.chess-square{transition:all .2s ease;position:relative}.chess-square:hover{filter:brightness(1.1);transform:scale(1.02)}.chess-square.light:hover{background-color:#f4e4c1!important}.chess-square.dark:hover{background-color:#c49976!important}.board-info{display:flex;gap:2rem;font-size:.9rem}.board-info div{padding:.5rem 1rem;background:#f8f9fa;border-radius:6px;border:1px solid #e1e8ed}.chessground-board{border-radius:12px;overflow:hidden;box-shadow:0 10px 30px #0003}.chessground-board .cg-wrap,.chessground-board .cg-board{width:100%!important;height:100%!important}.chessground-board .cg-board piece{transition:none!important;animation:none!important}.chessground-board .cg-board piece.moving{transition:none!important;z-index:9!important}.chessground-board .cg-wrap{overflow:visible}.chessground-board *{animation:none!important;transition:none!important}.chessground-board .cg-board piece{animation:none!important;transition:none!important;transform-origin:center!important}.chessground-board .cg-board piece.anim{animation:none!important;transition:none!important}.chessground-board .cg-board square.move-dest{background:radial-gradient(circle,rgba(20,85,30,.5) 22%,transparent 22%)}.chessground-board .cg-board square.premove-dest{background:radial-gradient(circle,rgba(20,30,85,.5) 22%,transparent 22%)}.chessground-board .cg-board square.oc.move-dest{background:radial-gradient(circle,rgba(20,85,30,.8) 50%,transparent 50%)}.chessground-board .cg-board square.oc.premove-dest{background:radial-gradient(circle,rgba(20,30,85,.8) 50%,transparent 50%)}.chessground-board .cg-board square.highlight{box-shadow:inset 0 0 0 3px!important;z-index:3}.chessground-board .cg-board square.best-move-1-from{background-color:#a7f3d0cc!important;box-shadow:inset 0 0 0 3px #059669!important}.chessground-board .cg-board square.best-move-1-to{background-color:#059669cc!important;box-shadow:inset 0 0 0 3px #065f46!important}.chessground-board .cg-board square.best-move-2-from{background-color:#bfdbfecc!important;box-shadow:inset 0 0 0 3px #2563eb!important}.chessground-board .cg-board square.best-move-2-to{background-color:#2563ebcc!important;box-shadow:inset 0 0 0 3px #1d4ed8!important}.chessground-board .cg-board square.best-move-3-from{background-color:#fecacacc!important;box-shadow:inset 0 0 0 3px #dc2626!important}.chessground-board .cg-board square.best-move-3-to{background-color:#dc2626cc!important;box-shadow:inset 0 0 0 3px #b91c1c!important}.chessground-board .cg-shapes .shape{opacity:.8}.chessground-board .cg-shapes .shape.arrow{stroke-width:8px;marker-end:url(#arrowhead)}.chessground-board .cg-shapes{pointer-events:none}.chessground-board .cg-shapes .shape.arrow.paleGrey{stroke:#6b7280;opacity:.7}.turn-indicator{display:flex;gap:.5rem;justify-content:center}.turn-badge{padding:.75rem 1.5rem;border-radius:8px;border:3px solid #cbd5e1;font-weight:600;transition:all .2s ease;cursor:pointer;font-size:1.2rem;min-width:80px;height:45px;display:flex;align-items:center;justify-content:center;box-shadow:0 2px 6px #0000001a}.turn-badge:first-child{background:#fff;color:#1f2937;border-color:#9ca3af}.turn-badge:last-child{background:#1f2937;color:#fff;border-color:#374151}.turn-badge.active{border-width:4px;transform:scale(1.1);box-shadow:0 4px 12px #0003}.turn-badge:first-child.active{border-color:#3b82f6;box-shadow:0 4px 12px #3b82f666}.turn-badge:last-child.active{border-color:#ef4444;box-shadow:0 4px 12px #ef444466}.analysis-results{display:flex;flex-direction:column;gap:1rem}.results-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:1rem}.results-header h3{margin:0;color:var(--text-primary)}.ai-toggle-container{display:flex;align-items:center;gap:.5rem}.toggle-switch{position:relative;display:inline-block;width:35px;height:16.8px}.toggle-switch input{opacity:0;width:0;height:0}.toggle-slider{position:absolute;cursor:pointer;inset:0;background-color:#ccc;transition:.4s;border-radius:24px}.toggle-slider:before{position:absolute;content:"";height:12.6px;width:12.6px;left:2.1px;bottom:2.1px;background-color:#fff;transition:.4s;border-radius:50%}input:checked+.toggle-slider{background-color:#667eea}input:checked+.toggle-slider:before{transform:translate(18.2px)}.analyze-btn{width:100%;padding:1rem;font-size:1rem;margin-bottom:1rem}.analyze-btn.thinking{background:linear-gradient(135deg,#ffa726,#ff7043);animation:pulse 2s infinite}@keyframes pulse{0%{opacity:1}50%{opacity:.7}to{opacity:1}}.results-list{display:flex;flex-direction:column;gap:1rem}.result-item{border:1px solid var(--border-secondary);border-radius:8px;padding:1rem;background:var(--bg-secondary);transition:all .3s ease}.best-move-header{display:flex;align-items:center;gap:.5rem;margin-bottom:.5rem}.best-move-header label{font-weight:600;color:var(--text-primary);transition:color .3s ease}.move-details{display:flex;align-items:center;gap:.5rem}.result-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:.5rem}.result-values{display:flex;gap:.5rem}.move-input,.eval-input{padding:.5rem;border:1px solid var(--border-secondary);border-radius:4px;font-family:monospace;background:var(--bg-tertiary);color:var(--text-primary);transition:all .3s ease}.move-input{width:80px}.eval-input{width:80px;text-align:center;font-weight:700}.move-details{margin:.5rem 0}.make-move-icon-btn{background:linear-gradient(135deg,#059669,#047857);color:#fff;border:none;padding:.5rem;border-radius:6px;cursor:pointer;display:inline-flex;align-items:center;justify-content:center;transition:all .2s ease;width:32px;height:32px}.make-move-icon-btn:hover{background:linear-gradient(135deg,#047857,#065f46);transform:translateY(-1px);box-shadow:0 3px 10px #05966966}.make-move-icon-btn:disabled{opacity:.5;cursor:not-allowed;transform:none}.make-move-icon-btn:disabled:hover{transform:none}.make-move-icon-btn-small-green{background:linear-gradient(135deg,#22c55e,#16a34a);color:#fff;border:none;padding:.25rem;border-radius:4px;cursor:pointer;display:inline-flex;align-items:center;justify-content:center;transition:all .2s ease;width:24px;height:24px;margin-left:.5rem;margin-right:10px}.make-move-icon-btn-small-blue{background:linear-gradient(135deg,#3b82f6,#2563eb);color:#fff;border:none;padding:.25rem;border-radius:4px;cursor:pointer;display:inline-flex;align-items:center;justify-content:center;transition:all .2s ease;width:24px;height:24px;margin-left:.5rem;margin-right:10px}.make-move-icon-btn-small-red{background:linear-gradient(135deg,#ef4444,#dc2626);color:#fff;border:none;padding:.25rem;border-radius:4px;cursor:pointer;display:inline-flex;align-items:center;justify-content:center;transition:all .2s ease;width:24px;height:24px;margin-left:.5rem;margin-right:10px}.make-move-icon-btn-small{background:linear-gradient(135deg,#059669,#047857);color:#fff;border:none;padding:.25rem;border-radius:4px;cursor:pointer;display:inline-flex;align-items:center;justify-content:center;transition:all .2s ease;width:24px;height:24px;margin-left:.5rem;margin-right:10px}.make-move-icon-btn-small:hover{background:linear-gradient(135deg,#047857,#065f46);transform:translateY(-1px);box-shadow:0 2px 6px #05966966}.make-move-icon-btn-small:disabled{opacity:.5;cursor:not-allowed;transform:none}.make-move-icon-btn-small:disabled:hover{transform:none}.best-move-label{display:flex;align-items:center}.best-move-label label{margin:0;font-weight:600;color:#2d3748}.fen-header-buttons{display:flex;align-items:center;gap:.5rem}.principal-variation{margin-top:.5rem}.principal-variation label{display:block;font-size:.85rem;font-weight:500;margin-bottom:.25rem;color:#4a5568}.pv-textarea{width:100%;padding:.5rem;border:1px solid var(--border-secondary);border-radius:4px;font-family:monospace;font-size:.8rem;background:var(--bg-tertiary);color:var(--text-primary);resize:none;transition:all .3s ease}.analysis-progress{display:flex;flex-direction:column;align-items:center;gap:.5rem;padding:1rem;background:#f0f4f8;border-radius:8px;margin-top:1rem}.progress-bar{width:100%;height:6px;background:#e2e8f0;border-radius:3px;overflow:hidden}.progress-fill{height:100%;background:linear-gradient(90deg,#667eea,#764ba2);animation:progress 2s ease-in-out infinite}@keyframes progress{0%{width:0%}50%{width:70%}to{width:100%}}.cg-wrap .cg-shapes{pointer-events:none}.cg-wrap .cg-shapes circle{display:none}.cg-wrap .cg-shapes rect{fill:none;stroke-width:3;rx:0;ry:0}.cg-wrap .cg-shapes rect[stroke="#008000"]{stroke:#22c55e;stroke-width:4}.cg-wrap .cg-shapes rect[stroke="#0000ff"]{stroke:#3b82f6;stroke-width:4}.cg-wrap .cg-shapes rect[stroke="#ff0000"]{stroke:#ef4444;stroke-width:4}.cg-wrap .cg-shapes rect[stroke="#ffff00"]{stroke:#eab308;stroke-width:4}.cg-wrap .cg-shapes rect[stroke="#ffa500"]{stroke:#f97316;stroke-width:4}.cg-wrap .cg-shapes rect[stroke="#800080"]{stroke:#a855f7;stroke-width:4}.cg-wrap .cg-shapes rect[stroke="#00ffff"]{stroke:#06b6d4;stroke-width:4}.cg-wrap .cg-shapes text{font-size:18px;font-weight:700;text-anchor:middle;dominant-baseline:central;fill:#000;stroke:#fff;stroke-width:2;paint-order:stroke}.cg-board square.best-move-highlight-1{box-shadow:inset 0 0 0 4px #22c55e!important;background-color:#22c55e33!important}.cg-board square.best-move-highlight-2{box-shadow:inset 0 0 0 4px #3b82f6!important;background-color:#3b82f633!important}.cg-board square.best-move-highlight-3{box-shadow:inset 0 0 0 4px #ef4444!important;background-color:#ef444433!important}.cg-board square.pv-highlight-1{box-shadow:inset 0 0 0 4px #eab308!important;background-color:#eab3084d!important;position:relative}.cg-board square.pv-highlight-1:after{content:attr(data-move-number);position:absolute;top:50%;left:50%;transform:translate(-50%,-50%);font-size:20px;font-weight:700;color:#000;text-shadow:2px 2px 4px rgba(255,255,255,.8);pointer-events:none;z-index:10}.cg-board square.pv-highlight-2{box-shadow:inset 0 0 0 4px #f97316!important;background-color:#f973164d!important;position:relative}.cg-board square.pv-highlight-2:after{content:attr(data-move-number);position:absolute;top:50%;left:50%;transform:translate(-50%,-50%);font-size:20px;font-weight:700;color:#000;text-shadow:2px 2px 4px rgba(255,255,255,.8);pointer-events:none;z-index:10}.cg-board square.pv-highlight-3{box-shadow:inset 0 0 0 4px #a855f7!important;background-color:#a855f74d!important;position:relative}.cg-board square.pv-highlight-3:after{content:attr(data-move-number);position:absolute;top:50%;left:50%;transform:translate(-50%,-50%);font-size:20px;font-weight:700;color:#000;text-shadow:2px 2px 4px rgba(255,255,255,.8);pointer-events:none;z-index:10}.cg-board square.pv-highlight-4{box-shadow:inset 0 0 0 4px #06b6d4!important;background-color:#06b6d44d!important;position:relative}.cg-board square.pv-highlight-4:after{content:attr(data-move-number);position:absolute;top:50%;left:50%;transform:translate(-50%,-50%);font-size:20px;font-weight:700;color:#000;text-shadow:2px 2px 4px rgba(255,255,255,.8);pointer-events:none;z-index:10}.cg-board square.best-move-from,.cg-board square.best-move-to{transition:all .3s ease!important;position:relative!important;z-index:10!important}.cg-board square.best-move-1.best-move-from{background-color:#90ee90!important;box-shadow:inset 0 0 0 4px #32cd32!important}.cg-board square.best-move-1.best-move-to{background-color:#006400!important;box-shadow:inset 0 0 0 4px #228b22!important}.cg-board square.best-move-2.best-move-from{background-color:#ffb6c1!important;box-shadow:inset 0 0 0 4px #ff69b4!important}.cg-board square.best-move-2.best-move-to{background-color:#8b0000!important;box-shadow:inset 0 0 0 4px #dc143c!important}.cg-board square.best-move-3.best-move-from{background-color:#87ceeb!important;box-shadow:inset 0 0 0 4px #4169e1!important}.cg-board square.best-move-3.best-move-to{background-color:navy!important;box-shadow:inset 0 0 0 4px #0000cd!important}.cg-board square.best-move-from:before,.cg-board square.best-move-to:before{content:"";position:absolute;inset:0;pointer-events:none;z-index:1}@media (max-width: 1400px){.main-content{grid-template-columns:auto 1fr 1fr;gap:1.5rem}.results-column{grid-column:1 / -1}}@media (max-width: 1200px){.main-content{grid-template-columns:1fr 1fr;gap:1.5rem}.boards-sidebar{grid-column:1 / -1;width:100%;min-width:unset}.results-column{grid-column:1 / -1}}.progress-bar-container{margin:1rem 0;padding:1rem;background-color:var(--progress-bg);border-radius:6px;border:1px solid var(--border-secondary)}.progress-label{font-size:.9rem;font-weight:500;color:#495057;margin-bottom:.5rem}progress{width:100%;height:4px;margin-bottom:1rem;appearance:none;border:none;border-radius:2px;background-color:#e9ecef}progress::-webkit-progress-bar{background-color:#e9ecef;border-radius:2px}progress::-webkit-progress-value{background:linear-gradient(90deg,#28a745,#20c997);border-radius:2px;transition:width .3s ease}progress::-moz-progress-bar{background:linear-gradient(90deg,#28a745,#20c997);border-radius:2px}.engine-settings{display:flex;align-items:center;gap:.5rem;margin-bottom:1rem;padding:.5rem;background-color:var(--engine-bg);border-radius:4px;border:1px solid var(--border-secondary)}.btn-icon{padding:.5rem;border:1px solid #ced4da;background-color:#fff;border-radius:4px;cursor:pointer;display:flex;align-items:center;justify-content:center;transition:all .2s ease}.btn-icon:hover{background-color:#e9ecef;border-color:#adb5bd}.btn-engine{background:linear-gradient(135deg,#3b82f6,#2563eb);color:#fff;padding:.75rem 1.5rem;font-weight:600;border:none;box-shadow:0 3px 12px #3b82f64d;width:100%;margin-top:1rem}.btn-engine:hover{background:linear-gradient(135deg,#2563eb,#1d4ed8);transform:translateY(-1px);box-shadow:0 4px 16px #3b82f666}.btn-engine.thinking{background:linear-gradient(135deg,#f59e0b,#d97706);animation:pulse 2s infinite}.engine-analysis-section{display:flex;flex-direction:column;gap:1rem;padding:1rem;background-color:var(--engine-bg);border-radius:8px;border:1px solid var(--border-secondary)}.engine-controls-row{display:flex;align-items:center;justify-content:space-between;gap:1rem;margin-bottom:1rem;flex-wrap:wrap}.think-time-container{display:flex;align-items:center;gap:.5rem;margin-bottom:0}.think-time-container label{margin-bottom:0!important;line-height:1;display:flex;align-items:center}.think-time-select{padding:.5rem;border:1px solid var(--border-secondary);border-radius:4px;background:var(--bg-tertiary);color:var(--text-primary);font-size:.9rem;min-width:60px}.think-time-select:focus{outline:none;border-color:var(--focus-border);box-shadow:0 0 0 3px var(--focus-shadow)}.pgn-input-container{display:flex;flex-direction:column;gap:.5rem;margin-top:.5rem}.pgn-input-field{width:100%;padding:.75rem;border:2px solid #e1e8ed;border-radius:8px;font-family:monospace;font-size:.85rem;background:#fff;resize:vertical;transition:border-color .2s ease}.pgn-input-field:focus{outline:none;border-color:#667eea;box-shadow:0 0 0 3px #667eea1a}.game-management-buttons{display:flex;gap:.75rem;flex-wrap:wrap}.modal-overlay{position:fixed;inset:0;background-color:var(--modal-overlay);display:flex;align-items:center;justify-content:center;z-index:1000;-webkit-backdrop-filter:blur(4px);backdrop-filter:blur(4px)}.modal-content{background:var(--modal-bg);border-radius:12px;box-shadow:0 20px 60px var(--modal-shadow);max-width:600px;width:90%;max-height:80vh;overflow:hidden;animation:modalSlideIn .3s ease-out}@keyframes modalSlideIn{0%{opacity:0;transform:translateY(-50px) scale(.95)}to{opacity:1;transform:translateY(0) scale(1)}}.modal-header{display:flex;justify-content:space-between;align-items:center;padding:1.5rem;border-bottom:1px solid var(--border-secondary);background:var(--header-bg);color:var(--header-text)}.modal-title{display:flex;align-items:center;gap:.75rem}.modal-title h3{margin:0;font-size:1.25rem;font-weight:600}.modal-close-btn{background:#fff3;border:none;border-radius:6px;padding:.5rem;cursor:pointer;color:#fff;display:flex;align-items:center;justify-content:center;transition:background-color .2s ease}.modal-close-btn:hover{background:#ffffff4d}.modal-body{padding:1.5rem;max-height:60vh;overflow-y:auto}.pgn-input-section{margin-bottom:1rem}.pgn-input-section label{display:block;font-weight:600;margin-bottom:.5rem;color:var(--text-primary)}.pgn-textarea{width:100%;padding:.75rem;border:2px solid var(--border-secondary);border-radius:8px;font-family:Consolas,Monaco,monospace;font-size:.9rem;background:var(--textarea-bg);color:var(--text-primary);resize:vertical;transition:border-color .2s ease;line-height:1.5}.pgn-textarea:focus{outline:none;border-color:var(--focus-border);box-shadow:0 0 0 3px var(--focus-shadow);background:var(--textarea-bg)}.pgn-textarea::placeholder{color:#a0aec0;font-style:italic}.pgn-info{background:var(--info-bg);padding:1rem;border-radius:6px;border-left:4px solid var(--info-border);margin-top:1rem}.pgn-info p{margin:0;font-size:.9rem;color:var(--text-secondary);line-height:1.5}.pgn-info p strong{color:var(--text-primary)}.modal-footer{display:flex;justify-content:flex-end;gap:.75rem;padding:1.5rem;border-top:1px solid var(--border-secondary);background:var(--modal-footer-bg)}.alert{padding:.75rem 1rem;border-radius:6px;margin:1rem 0;font-weight:500}.alert-error{background-color:#fed7d7;color:#c53030;border:1px solid #feb2b2}.alert-success{background-color:#c6f6d5;color:#2f855a;border:1px solid #9ae6b4}.btn-warning{background:linear-gradient(135deg,#f6ad55,#ed8936);color:#fff;box-shadow:0 4px 15px #f6ad5566}.btn-warning:hover{transform:translateY(-2px);box-shadow:0 6px 20px #f6ad5599}.btn-small{padding:.5rem .75rem;font-size:.8rem}.btn-secondary.btn-small{padding:.55rem .825rem;font-size:.88rem;background:linear-gradient(135deg,#fffbeb,#fef3c7);color:#92400e;border:1px solid #f59e0b}.btn-secondary.btn-small:hover{background:linear-gradient(135deg,#fef3c7,#fed7aa);border-color:#d97706;color:#78350f}.fen-label-container{display:flex;justify-content:space-between;align-items:center;margin-bottom:.5rem}.progress-bars-section-compact{margin-top:.5rem;padding:.5rem;background-color:var(--progress-bg);border-radius:4px;border:1px solid var(--border-secondary);display:flex;flex-direction:column;gap:.25rem;max-height:60px}.progress-item-compact{margin-bottom:0;display:flex;flex-direction:column;gap:.125rem}.progress-label-compact{font-size:.75rem;font-weight:500;color:var(--text-secondary);margin-bottom:0;line-height:1}.progress-compact{width:100%;height:8px!important;margin:0;appearance:none;border:none;border-radius:4px;background-color:var(--progress-bg)}.progress-compact::-webkit-progress-bar{background-color:var(--progress-track-bg);border-radius:4px}.progress-compact::-webkit-progress-value{background:var(--progress-fill-bg);border-radius:4px;transition:width .3s ease}.progress-compact::-moz-progress-bar{background:var(--progress-fill-bg);border-radius:4px}.progress-bars-section{margin-top:1rem;padding:.75rem;background-color:#f0f4f8;border-radius:6px;border:1px solid #e2e8f0;display:flex;flex-direction:column;gap:.5rem}.progress-item{margin-bottom:0}.progress-item .progress-label{font-size:.8rem;font-weight:500;color:#4a5568;margin-bottom:.25rem}.control-group{margin-bottom:1rem}.btn-calculate-best-move{background:linear-gradient(135deg,#6b7280,#9ca3af);color:#fff;border:none;padding:10px;border-radius:8px;font-weight:600;cursor:pointer;transition:all .2s ease;display:inline-flex;align-items:center;gap:.5rem;font-size:.9rem;width:auto;max-width:200px;justify-content:center;box-shadow:0 2px 8px #6b728040}.btn-calculate-best-move:hover{background:linear-gradient(135deg,#4b5563,#6b7280);transform:translateY(-1px);box-shadow:0 3px 12px #6b728059}.btn-calculate-best-move.thinking{background:linear-gradient(135deg,#f59e0b,#d97706);animation:pulse 2s infinite}.btn-calculate-best-move:disabled{opacity:.5!important;cursor:not-allowed!important;transform:none!important;background:linear-gradient(135deg,#6b7280,#9ca3af)!important;color:#fff!important;border:none!important;box-shadow:0 2px 8px #6b728040!important}.btn-calculate-best-move:disabled:hover{transform:none!important;background:linear-gradient(135deg,#6b7280,#9ca3af)!important;box-shadow:0 2px 8px #6b728040!important}.game-information{margin-top:.5rem;padding:.5rem;background:var(--game-info-bg);border-radius:6px;border:1px solid var(--border-secondary);width:100%}.game-information h3{margin:0 0 .5rem;font-size:.9rem;font-weight:600;color:#2d3748}.game-info-content{display:flex;flex-direction:column;gap:.3rem}.players{font-size:.85rem;text-align:center;padding:.3rem;background:#f8f9fa;border-radius:3px}.game-meta{display:flex;justify-content:space-between;align-items:center;gap:.3rem;padding:.2rem 0}.game-event,.game-date,.game-result{font-size:.75rem;color:#666;text-align:center;flex:1;padding:.1rem}.game-navigation{margin-top:1rem;padding:1rem;background:var(--game-info-bg);border-radius:8px;border:1px solid var(--border-secondary);width:90%;margin-left:auto;margin-right:auto}.game-navigation h3{margin:0 0 .75rem;font-size:1rem;font-weight:600;color:var(--text-primary);text-align:center}.navigation-buttons{display:flex;align-items:center;justify-content:space-between;width:100%;gap:0}.btn-nav{padding:.75rem;border:1px solid #cbd5e1;background:linear-gradient(135deg,#f8fafc,#f1f5f9);border-radius:6px;cursor:pointer;display:flex;align-items:center;justify-content:center;transition:all .2s ease;color:#475569;min-width:48px;min-height:48px;flex:1;margin:0 2px}.move-indicator{font-size:.85rem;font-weight:500;color:#4a5568;padding:0 .5rem;min-width:80px;text-align:center;flex:1.5}.btn-nav:hover:not(:disabled){background:linear-gradient(135deg,#f1f5f9,#e2e8f0);border-color:#94a3b8;transform:translateY(-1px)}.btn-nav:disabled{opacity:.5;cursor:not-allowed}.ai-info-icon{color:#4a90e2;font-size:16px;cursor:pointer;margin-left:8px;transition:color .3s ease;position:relative;background:none;border:none;padding:2px}.ai-info-icon:hover{color:#2171b5}.ai-tooltip{position:fixed;background:#2c3e50!important;color:#fff!important;padding:12px 16px;border-radius:8px;box-shadow:0 4px 12px #00000026;min-width:250px;max-width:400px;z-index:9999!important;opacity:0;visibility:hidden;transition:opacity .3s ease,visibility .3s ease;font-size:14px;line-height:1.4;pointer-events:none;transform:translate(20px) translateY(-5px)}.ai-tooltip.visible{opacity:1!important;visibility:visible!important;pointer-events:auto}.ai-tooltip .ai-loading{display:flex;align-items:center;gap:8px;font-style:italic;color:#bdc3c7}.ai-tooltip .ai-loading .spin{animation:spin 1s linear infinite}.ai-tooltip .ai-text{color:#fff!important;font-weight:400;background:transparent!important;border:none!important;padding:0!important;box-shadow:none!important}.ai-tooltip .ai-text:before{display:none}.ai-tooltip .ai-content{color:#fff!important;background:transparent!important}.make-move-btn{background:linear-gradient(135deg,#8fbddf,#7bc4c4);color:#fff;border:none;padding:6px 12px;border-radius:4px;cursor:pointer;font-size:12px;font-weight:700;transition:all .3s ease;box-shadow:0 2px 8px #0000001a;position:relative;overflow:hidden;margin-left:auto}.make-move-btn:before{content:"";position:absolute;top:0;left:-100%;width:100%;height:100%;background:linear-gradient(90deg,transparent,rgba(255,255,255,.2),transparent);transition:left .5s}.make-move-btn:hover:before{left:100%}.make-move-btn:hover{transform:translateY(-1px);box-shadow:0 4px 12px #8fbddf4d}.make-move-btn:active{transform:translateY(0);box-shadow:0 2px 6px #8fbddf33}.make-move-btn:disabled{opacity:.5;cursor:not-allowed;transform:none}.make-move-btn:disabled:hover{transform:none}.ai-settings-info{margin-bottom:1.5rem}.info-banner{display:flex;gap:.75rem;padding:1rem;background:#e3f2fd;border-radius:8px;border-left:4px solid #2196f3}.info-banner div{flex:1}.info-banner p{margin:0 0 .5rem;font-size:.9rem;line-height:1.4}.info-banner code{display:block;background:#0000001a;padding:.5rem;border-radius:4px;font-size:.8rem;margin:.5rem 0;word-break:break-all}.env-note{font-style:italic;color:#666}.api-services{display:flex;flex-direction:column;gap:1rem}.api-service{padding:1rem;border:1px solid #e2e8f0;border-radius:8px;background:#f8f9fa}.service-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:.75rem}.service-header h4{margin:0;font-size:1rem;display:flex;align-items:center;gap:.5rem}.free-badge{background:#28a745;color:#fff;padding:2px 8px;border-radius:12px;font-size:11px;font-weight:700}.paid-badge{background:#ffc107;color:#333;padding:2px 8px;border-radius:12px;font-size:11px;font-weight:700}.api-link{display:flex;align-items:center;gap:.25rem;color:#2196f3;text-decoration:none;font-size:.9rem}.api-link:hover{text-decoration:underline}.api-key-input{width:100%;padding:.75rem;border:1px solid #cbd5e0;border-radius:6px;font-family:monospace;font-size:.9rem;background:#fff;transition:border-color .2s ease}.api-key-input:focus{outline:none;border-color:#667eea;box-shadow:0 0 0 3px #667eea1a}.api-status{margin-top:.5rem;font-size:.8rem;font-weight:500}.status-connected{color:#28a745}.status-disconnected{color:#dc3545}.providers-info{margin-top:1.5rem;padding:1rem;background:#f0f4f8;border-radius:6px}.providers-info h5{margin:0 0 .5rem;font-size:.9rem;color:#4a5568}.providers-list{display:flex;gap:.5rem;flex-wrap:wrap}.provider-badge{background:linear-gradient(135deg,#667eea,#764ba2);color:#fff;padding:.25rem .75rem;border-radius:15px;font-size:.8rem;font-weight:500}.no-providers{color:#666;font-style:italic;font-size:.9rem}.ai-explanation{margin-top:.75rem;padding:.75rem;background:linear-gradient(135deg,#e8f5e8,#f0f8ff);border-radius:6px;border-left:4px solid #28a745}.ai-explanation label{display:block;font-size:.85rem;font-weight:600;margin-bottom:.5rem;color:#2d5016}.ai-explanation p{margin:0;font-size:.9rem;line-height:1.4;color:#4a5568}.loading-icon{animation:spin 1s linear infinite;color:#667eea}@keyframes spin{0%{transform:rotate(0)}to{transform:rotate(360deg)}}.error-message{display:flex;align-items:center;gap:.5rem;color:#dc3545;font-size:.85rem}.ai-toggle-label{font-size:.9rem;font-weight:500;color:var(--text-secondary);transition:color .3s ease}.header-content{display:flex;justify-content:space-between;align-items:center;width:100%;max-width:1800px;margin:0 auto}.header-text{flex:1}.auth-section{display:flex;align-items:center}.login-button{display:flex;align-items:center;gap:.5rem;padding:.75rem 1.5rem;background:#ffffff1a;color:#fff;border:1px solid rgba(255,255,255,.2);-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);transition:all .2s ease;margin-top:-20px}.login-button:hover{background:#fff3;border-color:#ffffff4d;transform:translateY(-1px)}.user-profile{position:relative}.user-profile-button{display:flex;align-items:center;gap:.75rem;padding:.5rem 1rem;background:#ffffff1a;color:#fff;border:1px solid rgba(255,255,255,.2);border-radius:8px;cursor:pointer;transition:all .2s ease;-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px)}.user-profile-button:hover{background:#ffffff26;border-color:#ffffff4d}.user-avatar{width:32px;height:32px;border-radius:50%;background:#fff3;display:flex;align-items:center;justify-content:center}.user-info{display:flex;flex-direction:column;align-items:flex-start;text-align:left}.user-name{font-size:.9rem;font-weight:600;line-height:1}.user-email{font-size:.75rem;opacity:.8;line-height:1;margin-top:2px}.user-dropdown{position:absolute;top:100%;right:0;margin-top:.5rem;min-width:280px;background:#fff;border-radius:12px;box-shadow:0 20px 60px #00000026,0 8px 25px #0000001a;border:1px solid rgba(0,0,0,.05);overflow:hidden;z-index:1000;animation:dropdownSlideIn .2s ease-out}@keyframes dropdownSlideIn{0%{opacity:0;transform:translateY(-10px) scale(.95)}to{opacity:1;transform:translateY(0) scale(1)}}.user-dropdown-header{display:flex;align-items:center;gap:1rem;padding:1.5rem;background:linear-gradient(135deg,#f8fafc,#f1f5f9)}.user-avatar-large{width:48px;height:48px;border-radius:50%;background:linear-gradient(135deg,#667eea,#764ba2);display:flex;align-items:center;justify-content:center;color:#fff}.user-details{flex:1}.user-name-large{font-size:1.1rem;font-weight:600;color:#1f2937;line-height:1.2}.user-email-small{font-size:.85rem;color:#6b7280;line-height:1.2}.user-dropdown-divider{height:1px;background:linear-gradient(90deg,transparent,#e5e7eb,transparent)}.user-dropdown-menu{padding:.5rem}.dropdown-item{display:flex;align-items:center;gap:.75rem;width:100%;padding:.75rem 1rem;background:none;border:none;border-radius:8px;cursor:pointer;transition:all .2s ease;font-size:.9rem;color:#374151;text-align:left}.dropdown-item:hover{background:#f3f4f6;color:#1f2937}.dropdown-item.logout-item{color:#dc2626}.dropdown-item.logout-item:hover{background:#fef2f2;color:#dc2626}.auth-form{display:flex;flex-direction:column;gap:1.5rem}.form-group{display:flex;flex-direction:column;gap:.5rem}.form-group label{font-size:.9rem;font-weight:600;color:#374151}.input-container{position:relative;display:flex;align-items:center}.input-icon{position:absolute;left:.75rem;color:#9ca3af;z-index:1}.form-input{width:100%;padding:.75rem .75rem .75rem 2.75rem;border:2px solid #e5e7eb;border-radius:8px;font-size:.9rem;background:#fff;transition:all .2s ease;box-sizing:border-box}.form-input:focus{outline:none;border-color:#667eea;box-shadow:0 0 0 3px #667eea1a}.password-toggle{position:absolute;right:.75rem;background:none;border:none;color:#9ca3af;cursor:pointer;padding:.25rem;border-radius:4px;transition:color .2s ease}.password-toggle:hover{color:#667eea}.auth-submit-btn{width:100%;padding:1rem;font-size:1rem;font-weight:600;margin-top:.5rem}.loading-spinner{display:inline-block}.auth-switch{text-align:center;margin-top:1rem;padding-top:1rem;border-top:1px solid #e5e7eb}.auth-switch p{margin:0;color:#6b7280;font-size:.9rem}.switch-mode-btn{background:none;border:none;color:#667eea;font-weight:600;cursor:pointer;margin-left:.5rem;transition:color .2s ease}.switch-mode-btn:hover{color:#5a67d8;text-decoration:underline}.mobile-menu-button{display:none;background:linear-gradient(135deg,#64748b,#94a3b8);color:#fff;border:none;border-radius:8px;padding:.75rem;cursor:pointer;box-shadow:0 4px 12px #00000026;transition:transform .2s ease,box-shadow .2s ease;position:absolute!important;top:0!important;left:0!important;transform:translate(16px,16px)!important;z-index:2147483647!important;margin:0!important;will-change:transform;-webkit-backface-visibility:hidden;backface-visibility:hidden}.mobile-menu-button:hover{background:linear-gradient(135deg,#475569,#64748b);transform:translateY(-1px);box-shadow:0 6px 16px #0003}.mobile-menu-overlay{position:fixed;inset:0;background:#00000080;z-index:1000;display:flex;align-items:flex-start;justify-content:flex-start;-webkit-backdrop-filter:blur(4px);backdrop-filter:blur(4px)}.mobile-menu-content{background:#fff;width:320px;height:100vh;overflow-y:auto;box-shadow:4px 0 20px #00000026;animation:slideInLeft .3s ease-out}@keyframes slideInLeft{0%{transform:translate(-100%)}to{transform:translate(0)}}.mobile-menu-header{display:flex;justify-content:space-between;align-items:center;padding:1.5rem 1rem;background:linear-gradient(135deg,#64748b,#94a3b8);color:#fff;border-bottom:1px solid rgba(255,255,255,.1)}.mobile-menu-header h2{margin:0;font-size:1.25rem;font-weight:600}.mobile-menu-close{background:#fff3;border:none;border-radius:4px;padding:.5rem;color:#fff;cursor:pointer;display:flex;align-items:center;justify-content:center;transition:background-color .2s ease}.mobile-menu-close:hover{background:#ffffff4d}.mobile-menu-items{padding:0}.mobile-menu-item{border-bottom:1px solid #e2e8f0}.mobile-menu-item-header{display:flex;align-items:center;gap:.75rem;padding:1rem;cursor:pointer;transition:background-color .2s ease;position:relative}.mobile-menu-item-header:hover{background:#f8f9fa}.mobile-menu-item-header span{flex:1;font-weight:500;color:#374151}.expand-icon{transition:transform .2s ease;color:#6b7280;font-size:.8rem}.expand-icon.expanded{transform:rotate(180deg)}.mobile-boards-container{padding:0 1rem 1rem;background:#f8f9fa;border-top:1px solid #e2e8f0}.mobile-boards-container .boards-manager{background:#fff;border-radius:8px;margin-top:.5rem}.mobile-calculate-button{display:none;width:70%;margin:1rem auto;padding:.5rem;background:linear-gradient(135deg,#6b7280,#9ca3af);color:#fff;border:none;border-radius:8px;font-weight:600;cursor:pointer;transition:all .2s ease;box-shadow:0 2px 8px #6b728040;font-size:1.4875rem;display:flex;align-items:center;justify-content:center;gap:.5rem}.mobile-calculate-button:hover{background:linear-gradient(135deg,#4b5563,#6b7280);transform:translateY(-1px);box-shadow:0 3px 12px #6b728059}.mobile-calculate-button.thinking{background:linear-gradient(135deg,#f59e0b,#d97706);animation:pulse 2s infinite}.mobile-calculate-button:disabled{opacity:.5!important;cursor:not-allowed!important;transform:none!important}.mobile-calculate-button:disabled:hover{transform:none!important}@media (max-width: 768px){*{box-sizing:border-box}html,body{overflow-x:hidden;width:100%;max-width:100vw;font-size:14px}.app{overflow-x:hidden;width:100%;max-width:100vw;min-height:100vh}.mobile-menu-button{display:block!important;position:fixed!important;top:1rem!important;left:1rem!important;z-index:1001!important;will-change:transform;transform:translateZ(0);-webkit-transform:translate3d(0,0,0);contain:layout style paint}.boards-sidebar{display:none}.main-content{grid-template-columns:1fr;gap:.5rem;padding:4rem .25rem .25rem;max-width:100vw;overflow-x:hidden}.app-header{padding:4rem .25rem .5rem;margin-bottom:.5rem}.app-header h1{font-size:1.2rem;margin:0}.app-header p{font-size:.8rem;margin:.5rem 0 0}.board-column,.controls-column,.results-column{width:100%;max-width:100%;padding:.25rem;margin:0 0 .5rem;box-sizing:border-box}.chess-board-container{width:100%;overflow:hidden;display:flex;justify-content:center;margin-bottom:.5rem}.chessground-board{min-width:200px!important}.chessground-board .cg-board{width:100%!important;height:100%!important}.mobile-calculate-button{display:flex!important;padding:.375rem;font-size:1.33875rem;margin:.5rem auto}.btn-calculate-best-move{display:none!important}.game-navigation{margin-top:.5rem;padding:.5rem;width:100%}.game-navigation h3{font-size:.9rem;margin:0 0 .5rem}.navigation-buttons{gap:.1rem}.btn-nav{min-width:35px;min-height:35px;padding:.4rem;font-size:.8rem}.move-indicator{min-width:50px;font-size:.7rem;padding:0 .25rem}.game-information{margin-top:.25rem;padding:.25rem}.game-information h3{font-size:.8rem;margin:0 0 .25rem}.players{font-size:.75rem;padding:.2rem}.game-event,.game-date,.game-result{font-size:.65rem}.controls-column{gap:.75rem}.control-group{margin-bottom:.5rem}.control-group label{font-size:.85rem;margin-bottom:.5rem}.fen-input-container{flex-direction:column;gap:.25rem}.fen-input-field{width:100%;font-size:.75rem;padding:.5rem}.btn{width:100%;justify-content:center;padding:.5rem .75rem;font-size:.8rem}.engine-controls-row{flex-direction:column;gap:.25rem;align-items:stretch;margin-bottom:.5rem}.think-time-container{justify-content:space-between;gap:.25rem}.think-time-container label{font-size:.8rem}.think-time-select{padding:.4rem;font-size:.8rem;min-width:50px}.turn-badge{padding:.5rem 1rem;font-size:1rem;min-width:60px;height:35px}.progress-bars-section-compact{padding:.25rem;max-height:40px}.progress-label-compact{font-size:.65rem}.progress-compact{height:6px!important}.results-column{padding:.25rem}.analysis-results{gap:.5rem}.results-header{margin-bottom:.5rem}.results-header h3{font-size:.9rem}.result-item{padding:.5rem;margin-bottom:.5rem}.move-input,.eval-input{padding:.4rem;font-size:.8rem}.move-input,.eval-input{width:70px}.make-move-icon-btn{width:28px;height:28px;padding:.4rem}.make-move-icon-btn-small{width:20px;height:20px;padding:.2rem;margin-left:.25rem;margin-right:5px}.principal-variation{margin-top:.25rem}.principal-variation label{font-size:.75rem;margin-bottom:.2rem}.pv-textarea{padding:.4rem;font-size:.7rem}.modal-content{width:95%;margin:0 auto}.modal-header{padding:1rem}.modal-title h3{font-size:1rem}.modal-body{padding:1rem}.api-services{gap:.5rem}.service-header{flex-direction:column;align-items:flex-start;gap:.25rem}.api-key-input{padding:.5rem;font-size:.8rem}.app-header{position:relative}.login-button{position:absolute!important;top:.5rem!important;right:.5rem!important;margin-top:0!important;z-index:1000;width:auto!important;max-width:none!important}}.auth-modal-overlay{position:fixed;inset:0;background-color:#00000080;display:flex;align-items:center;justify-content:center;z-index:1000;-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px)}.auth-modal-content{background:#fff;border-radius:16px;box-shadow:0 25px 50px #00000040;width:400px;max-width:90vw;position:relative;animation:authModalSlideIn .3s cubic-bezier(.34,1.56,.64,1)}@keyframes authModalSlideIn{0%{opacity:0;transform:translateY(-30px) scale(.9)}to{opacity:1;transform:translateY(0) scale(1)}}.auth-modal-close{position:absolute;top:16px;right:16px;background:#0000000d;border:none;border-radius:8px;width:32px;height:32px;display:flex;align-items:center;justify-content:center;cursor:pointer;color:#64748b;transition:all .2s ease;z-index:1}.auth-modal-close:hover{background:#0000001a;color:#334155}.auth-modal-body{padding:32px;text-align:center}.auth-modal-title{margin:0 0 24px;font-size:24px;font-weight:600;color:#1e293b;letter-spacing:-.025em}.google-oauth-btn{width:100%;height:48px;background:#fff;border:1.5px solid #e2e8f0;border-radius:12px;display:flex;align-items:center;justify-content:center;cursor:pointer;transition:all .2s ease;margin-bottom:20px;position:relative;overflow:hidden}.google-oauth-btn:hover{border-color:#cbd5e1;box-shadow:0 4px 12px #4285f426;transform:translateY(-1px)}.google-oauth-btn:active{transform:translateY(0)}.google-oauth-btn:disabled{opacity:.6;cursor:not-allowed;transform:none}.auth-divider{position:relative;margin:20px 0;text-align:center}.auth-divider:before{content:"";position:absolute;top:50%;left:0;right:0;height:1px;background:#e2e8f0}.auth-divider span{background:#fff;padding:0 16px;color:#64748b;font-size:14px;font-weight:500}.auth-form{display:flex;flex-direction:column;gap:16px;text-align:left}.auth-input{width:100%;height:48px;padding:0 16px;border:1.5px solid #e2e8f0;border-radius:12px;font-size:16px;background:#fff;transition:all .2s ease;box-sizing:border-box}.auth-input:focus{outline:none;border-color:#3b82f6;box-shadow:0 0 0 3px #3b82f61a}.auth-input::placeholder{color:#94a3b8}.password-input-wrapper{position:relative}.password-toggle-btn{position:absolute;right:12px;top:50%;transform:translateY(-50%);background:none;border:none;color:#64748b;cursor:pointer;padding:4px;border-radius:4px;transition:color .2s ease}.password-toggle-btn:hover{color:#334155}.auth-error{background:#fef2f2;border:1px solid #fecaca;color:#dc2626;padding:12px 16px;border-radius:8px;font-size:14px;text-align:center}.auth-submit-btn{width:100%;height:48px;background:linear-gradient(135deg,#3b82f6,#1d4ed8);color:#fff;border:none;border-radius:12px;font-size:16px;font-weight:600;cursor:pointer;transition:all .2s ease;margin-top:8px}.auth-submit-btn:hover{background:linear-gradient(135deg,#2563eb,#1e40af);transform:translateY(-1px);box-shadow:0 4px 12px #3b82f666}.auth-submit-btn:active{transform:translateY(0)}.auth-submit-btn:disabled{opacity:.6;cursor:not-allowed;transform:none}.auth-switch{margin-top:24px;text-align:center;font-size:14px;color:#64748b}.auth-switch-btn{background:none;border:none;color:#3b82f6;font-weight:600;cursor:pointer;margin-left:4px;transition:color .2s ease}.auth-switch-btn:hover{color:#2563eb;text-decoration:underline}@media (max-width: 768px){.auth-modal-content{width:350px;margin:16px}.auth-modal-body{padding:24px}.auth-modal-title{font-size:20px}}:root{--bg-primary: #e2e8f0;--bg-secondary: #f8fafc;--bg-tertiary: #ffffff;--text-primary: #1e293b;--text-secondary: #475569;--border-primary: #cbd5e1;--border-secondary: #e2e8f0;--header-bg: linear-gradient(135deg, #64748b 0%, #94a3b8 100%);--header-text: #ffffff;--btn-primary-bg: linear-gradient(135deg, #6366f1 0%, #8b5cf6 100%);--btn-primary-text: #ffffff;--btn-secondary-bg: linear-gradient(135deg, #f8fafc 0%, #f1f5f9 100%);--btn-secondary-text: #475569;--shadow-primary: rgba(0, 0, 0, .1);--input-bg: #ffffff;--input-border: #e2e8f0;--modal-bg: #ffffff;--modal-overlay: rgba(0, 0, 0, .6);--sidebar-bg: linear-gradient(135deg, #ffffff 0%, #f8fafc 100%);--sidebar-border: rgba(148, 163, 184, .2);--progress-bg: #f8f9fa;--board-info-bg: #f8f9fa;--game-info-bg: #ffffff;--sidebar-header-bg: linear-gradient(135deg, #f8fafc 0%, #f1f5f9 100%);--sidebar-header-shadow: rgba(255, 255, 255, .7);--scrollbar-track-bg: rgba(241, 245, 249, .8);--scrollbar-thumb-bg: linear-gradient(135deg, #cbd5e1, #94a3b8);--scrollbar-thumb-hover-bg: linear-gradient(135deg, #94a3b8, #64748b);--hover-bg: rgba(59, 130, 246, .1);--link-color: #2563eb;--active-bg: linear-gradient(135deg, #e0f2fe 0%, #e1f5fe 100%);--active-border: #0ea5e9;--active-shadow: rgba(14, 165, 233, .25);--active-inset-shadow: rgba(255, 255, 255, .5);--active-text: #0369a1;--text-shadow: rgba(75, 85, 99, .1);--success-color: #10b981;--success-hover-color: #059669;--success-hover-bg: rgba(16, 185, 129, .1);--error-color: #ef4444;--error-hover-bg: rgba(239, 68, 68, .1);--engine-bg: #f8f9fa;--focus-border: #667eea;--focus-shadow: rgba(102, 126, 234, .1);--modal-shadow: rgba(0, 0, 0, .3);--textarea-bg: #f8f9fa;--modal-footer-bg: #f8f9fa;--info-bg: #f0f4f8;--info-border: #667eea;--progress-track-bg: #e9ecef;--progress-fill-bg: linear-gradient(90deg, #28a745, #20c997)}html.dark{--bg-primary: #181a1b;--bg-secondary: #252729;--bg-tertiary: #343a40;--text-primary: #e1e1e6;--text-secondary: #a5a5a5;--border-primary: #343a40;--border-secondary: #444d56;--header-bg: linear-gradient(135deg, #1f3947 0%, #2e3c4f 100%);--header-text: #ffffff;--btn-primary-bg: linear-gradient(135deg, #556cd6 0%, #3949ab 100%);--btn-primary-text: #ffffff;--btn-secondary-bg: linear-gradient(135deg, #3a3b3c 0%, #444d56 100%);--btn-secondary-text: #e1e1e6;--shadow-primary: rgba(0, 0, 0, .6);--input-bg: #2d3748;--input-border: #4a5568;--modal-bg: #2d3748;--modal-overlay: rgba(0, 0, 0, .8);--sidebar-bg: linear-gradient(135deg, #2d3748 0%, #374151 100%);--sidebar-border: rgba(75, 85, 99, .3);--progress-bg: #374151;--board-info-bg: #374151;--game-info-bg: #2d3748;--sidebar-header-bg: linear-gradient(135deg, #334155 0%, #475569 100%);--sidebar-header-shadow: rgba(255, 255, 255, .1);--scrollbar-track-bg: rgba(51, 65, 85, .8);--scrollbar-thumb-bg: linear-gradient(135deg, #64748b, #94a3b8);--scrollbar-thumb-hover-bg: linear-gradient(135deg, #94a3b8, #cbd5e1);--hover-bg: rgba(59, 130, 246, .2);--link-color: #60a5fa;--active-bg: linear-gradient(135deg, #1e3a8a 0%, #1d4ed8 100%);--active-border: #3b82f6;--active-shadow: rgba(59, 130, 246, .25);--active-inset-shadow: rgba(255, 255, 255, .1);--active-text: #60a5fa;--text-shadow: rgba(0, 0, 0, .5);--success-color: #22c55e;--success-hover-color: #16a34a;--success-hover-bg: rgba(34, 197, 94, .2);--error-color: #f87171;--error-hover-bg: rgba(248, 113, 113, .2);--engine-bg: #374151;--focus-border: #60a5fa;--focus-shadow: rgba(96, 165, 250, .2);--modal-shadow: rgba(0, 0, 0, .6);--textarea-bg: #2d3748;--modal-footer-bg: #374151;--info-bg: #1e3a8a;--info-border: #60a5fa;--progress-track-bg: #4a5568;--progress-fill-bg: linear-gradient(90deg, #22c55e, #16a34a)}.theme-toggle-btn{background-color:transparent;border:1px solid var(--border-primary);color:var(--text-primary);border-radius:50%;cursor:pointer;display:flex;align-items:center;justify-content:center;transition:all .3s ease}.theme-toggle-btn:hover{background-color:var(--bg-secondary);border-color:var(--text-primary);transform:scale(1.1) rotate(15deg)}
