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td:last-child{border-bottom-right-radius:var(--radius-lg)}.stats{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:var(--space-lg);margin:var(--space-2xl) 0}.stat-card{background:var(--gradient-glass);-webkit-backdrop-filter:blur(20px);backdrop-filter:blur(20px);border:1px solid var(--glass-border);border-radius:var(--radius-2xl);padding:var(--space-2xl);text-align:center;transition:all var(--transition-normal);position:relative;overflow:hidden}.stat-card:before{content:"";position:absolute;top:-50%;left:-50%;width:200%;height:200%;background:var(--gradient-primary);opacity:.05;transform:rotate(45deg);transition:all var(--transition-slow)}.stat-card:hover:before{opacity:.1;transform:rotate(45deg) scale(1.1)}.stat-card:hover{transform:translateY(-10px) rotate(1deg);box-shadow:var(--shadow-2xl),0 0 40px var(--accent-light);border-color:var(--accent)}.stat-card h3{font-size:1rem;font-weight:600;color:var(--text-muted);margin-bottom:var(--space-sm);text-transform:uppercase;letter-spacing:.1em}.stat-card p{font-size:3rem;font-weight:800;background:var(--gradient-primary);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;margin:0;line-height:1}.start-quiz-btn{background:var(--gradient-primary);color:#fff;border:none;border-radius:var(--radius-2xl);padding:var(--space-lg) var(--space-2xl);font-size:1rem;font-weight:600;cursor:pointer;transition:all var(--transition-normal);box-shadow:var(--shadow-xl);text-transform:uppercase;letter-spacing:.05em;position:relative;overflow:hidden;max-width:220px}.start-quiz-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 var(--transition-slow)}.start-quiz-btn:hover:before{left:100%}.start-quiz-btn:hover{transform:translateY(-4px) scale(1.05);box-shadow:var(--shadow-2xl),0 0 40px var(--accent-light)}.start-quiz-btn:active{transform:translateY(-2px) scale(1.02)}.page-header{text-align:center;margin-bottom:var(--space-lg);padding:var(--space-lg) 0}.page-header h1{font-size:2.5rem;font-weight:800;background:var(--gradient-primary);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;margin-bottom:var(--space-md);text-shadow:0 4px 8px var(--shadow)}.page-header p{font-size:1rem;color:var(--text-muted);max-width:600px;margin:0 auto;line-height:1.6}.loading{display:flex;align-items:center;justify-content:center;min-height:200px;font-size:1.125rem;color:var(--text-muted)}.loading:after{content:"";width:20px;height:20px;border:2px solid var(--accent-light);border-top:2px solid var(--accent);border-radius:50%;animation:spin 1s linear infinite;margin-left:var(--space-sm)}.error-message{background:var(--danger-light);border:1px solid var(--danger);color:var(--danger);padding:var(--space-md) var(--space-lg);border-radius:var(--radius-lg);margin:var(--space-md) 0;font-weight:600}@media (max-width: 768px){.main-content{margin-left:0;margin-top:0;padding-top:calc(40px + var(--space-xs));padding-bottom:calc(70px + var(--space-xs) + env(safe-area-inset-bottom,0px));min-height:calc(100vh - 50px)}.container{padding:var(--space-sm);margin:0;min-height:auto;border-radius:var(--radius-md)}.start-quiz-btn{width:100%;padding:var(--space-sm);font-size:1rem}}@media (max-width: 480px){.main-content{padding-top:calc(35px + var(--space-xs));padding-bottom:calc(65px + var(--space-xs) + env(safe-area-inset-bottom,0px))}.container{padding:var(--space-xs);margin:0;border-radius:var(--radius-sm)}}@media (max-width: 320px){.main-content{padding-top:calc(30px + .2rem);padding-bottom:calc(60px + .2rem + env(safe-area-inset-bottom,0px))}.container{padding:.2rem;margin:0}}.notification-modal-overlay{position:fixed;top:0;left:0;right:0;bottom:0;background:#0006;-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);display:grid!important;place-items:center!important;place-content:center!important;z-index:10000;padding:var(--space-md);margin:0;box-sizing:border-box;width:100vw;height:100vh}.notification-modal-content{background:var(--card-bg-glass);-webkit-backdrop-filter:blur(25px);backdrop-filter:blur(25px);border-radius:var(--radius-xl);padding:var(--space-xl);max-width:500px;width:100%;text-align:center;overflow:hidden;transform-style:preserve-3d;perspective:1000px;margin:0 auto;box-sizing:border-box;position:relative;left:auto;right:auto;transform:none}.notification-header{position:absolute;top:0;left:0;right:0;height:4px;border-radius:var(--radius-xl) var(--radius-xl) 0 0}.notification-icon{font-size:3rem;margin-bottom:var(--space-md);display:flex;justify-content:center;align-items:center;height:80px}.notification-message{font-size:1.1rem;line-height:1.5;color:var(--text-primary);margin-bottom:var(--space-md);font-weight:500;text-shadow:0 1px 2px rgba(0,0,0,.1)}.notification-close-btn{position:absolute;top:var(--space-sm);right:var(--space-sm);background:transparent;border:none;font-size:1.2rem;color:var(--text-secondary);cursor:pointer;padding:var(--space-xs);border-radius:50%;width:36px;height:36px;display:flex;align-items:center;justify-content:center;transition:all var(--transition-normal);z-index:10}.notification-close-btn:hover{background:#ffffff1a;color:var(--text-primary)}.notification-progress{position:absolute;bottom:0;left:0;height:3px;border-radius:0 0 var(--radius-xl) var(--radius-xl);transform-origin:left}.notification-particle{position:absolute;width:6px;height:6px;border-radius:50%;pointer-events:none}.notification-particle-1{top:20%;left:15%}.notification-particle-2{top:30%;right:20%}.notification-particle-3{bottom:25%;left:25%}@media (max-width: 768px){.notification-modal-overlay{padding:var(--space-sm);display:grid!important;place-items:center!important;place-content:center!important}.notification-modal-content{padding:var(--space-lg);max-width:90vw;left:auto;right:auto;transform:none;margin:0 auto;position:relative}.notification-icon{font-size:2.5rem;height:60px;margin-bottom:var(--space-sm)}.notification-message{font-size:1rem;margin-bottom:var(--space-sm)}.notification-close-btn{width:32px;height:32px;font-size:1.1rem}}@media (max-width: 480px){.notification-modal-overlay{display:grid!important;place-items:center!important;place-content:center!important}.notification-modal-content{padding:var(--space-md);left:auto;right:auto;transform:none;margin:0 auto;max-width:95vw;position:relative}.notification-icon{font-size:2rem;height:50px}.notification-message{font-size:.95rem}}.ck-editor__editable{color:#fff!important;background-color:#121212!important;min-height:200px}.premium-header{position:fixed;top:0;left:0;right:0;z-index:1000;background:#0b1120eb;backdrop-filter:blur(24px) saturate(200%);-webkit-backdrop-filter:blur(24px) saturate(200%);border-bottom:1px solid rgba(255,255,255,.08);box-shadow:0 8px 32px -2px #0000004d,0 0 0 1px #ffffff08 inset,0 4px 16px -4px #3b82f626}.header-bg-effects{position:absolute;top:0;left:0;right:0;bottom:0;pointer-events:none;overflow:hidden}.bg-gradient-1{position:absolute;top:-50%;right:-10%;width:60%;height:200%;background:radial-gradient(ellipse at center,rgba(59,130,246,.08) 0%,transparent 70%);opacity:.6}.bg-gradient-2{position:absolute;top:-30%;left:-20%;width:80%;height:160%;background:radial-gradient(ellipse at center,rgba(139,92,246,.06) 0%,transparent 70%);opacity:.4}.bg-noise{position:absolute;top:0;left:0;right:0;bottom:0;background-image:url("data:image/svg+xml,%3Csvg viewBox='0 0 200 200' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noiseFilter'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.65' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noiseFilter)' opacity='0.03'/%3E%3C/svg%3E");opacity:.4}.header-main-content{display:flex;align-items:center;justify-content:space-between;padding:1rem 2rem;position:relative;z-index:2;gap:2rem}.header-left-section{display:flex;align-items:center;gap:2rem;flex:1}.brand-wrapper{display:flex;align-items:center}.logo-sphere{position:relative;width:40px;height:40px;display:flex;align-items:center;justify-content:center}.logo-core{width:16px;height:16px;background:linear-gradient(135deg,#3b82f6,#8b5cf6);border-radius:50%;position:relative;z-index:2;box-shadow:0 0 20px #3b82f666}.logo-orbits{position:absolute;top:0;left:0;right:0;bottom:0}.orbit-1,.orbit-2,.orbit-3{position:absolute;border:1px solid rgba(59,130,246,.3);border-radius:50%;animation:orbit 3s linear infinite}.orbit-1{top:4px;left:4px;right:4px;bottom:4px;animation-delay:0s}.orbit-2{top:2px;left:2px;right:2px;bottom:2px;animation-delay:-1s}.orbit-3{top:0;left:0;right:0;bottom:0;animation-delay:-2s}@keyframes orbit{0%{transform:rotate(0)}to{transform:rotate(360deg)}}.brand-text{display:flex;flex-direction:column;align-items:flex-start}.brand-title{font-size:1.5rem;font-weight:800;background:linear-gradient(135deg,#3b82f6,#8b5cf6,#ec4899);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;letter-spacing:-.025em;line-height:1}.brand-subtitle{font-size:.75rem;color:#94a3b8;font-weight:500;margin-top:2px;letter-spacing:.05em}.quick-actions{display:flex;align-items:center;gap:.5rem}.quick-action-btn{display:flex;align-items:center;gap:.5rem;padding:.625rem 1rem;background:#ffffff0d;border:1px solid rgba(255,255,255,.08);border-radius:10px;color:#cbd5e1;font-size:.8rem;font-weight:500;cursor:pointer;transition:all .3s ease;-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);white-space:nowrap}.quick-action-btn:hover{background:#ffffff1a;border-color:#ffffff26;color:#f1f5f9;transform:translateY(-1px);box-shadow:0 4px 12px #0003}.action-icon{width:16px;height:16px}.action-label{font-weight:600}.header-right-section{display:flex;align-items:center;gap:1rem}.search-section{display:flex;align-items:center}.search-trigger-btn{display:flex;align-items:center;gap:.5rem;padding:.75rem 1rem;background:#ffffff0d;border:1px solid rgba(255,255,255,.1);border-radius:12px;color:#94a3b8;font-size:.875rem;cursor:pointer;transition:all .3s ease;-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);min-width:180px}.search-trigger-btn:hover{background:#ffffff1a;border-color:#fff3;color:#e2e8f0}.search-trigger-icon{width:16px;height:16px;opacity:.7}.search-container-expanded{display:flex;align-items:center;background:#ffffff0d;border:1px solid rgba(255,255,255,.1);border-radius:12px;overflow:hidden;-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);position:relative}.search-icon{width:16px;height:16px;margin-left:1rem;color:#94a3b8}.search-input-expanded{flex:1;padding:.75rem 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rgba(255,255,255,.1);box-shadow:var(--shadow-lg);min-height:45px}.leaderboard-buttons button:hover{background:var(--accent2)}.leaderboard-controls{margin:var(--space-xl) 0;display:flex;justify-content:center;align-items:center;gap:var(--space-md);flex-wrap:wrap;padding:var(--space-md);background:#ffffff08;border-radius:20px;border:1px solid rgba(255,255,255,.08)}.leaderboard-controls select{background:linear-gradient(135deg,var(--accent) 0%,var(--accent2) 100%);color:#fff;border:1px solid rgba(255,255,255,.1);border-radius:var(--radius-lg);padding:var(--space-md) var(--space-xl);font-size:.9rem;font-weight:600;text-transform:uppercase;letter-spacing:.05em;cursor:pointer;transition:all var(--transition-normal);min-width:140px;min-height:45px;box-shadow:var(--shadow-lg);-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);-webkit-appearance:none;-moz-appearance:none;appearance:none;background-image:url("data:image/svg+xml;charset=UTF-8,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='white' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3e%3cpolyline points='6,9 12,15 18,9'%3e%3c/polyline%3e%3c/svg%3e");background-repeat:no-repeat;background-position:right 16px center;background-size:16px;padding-right:45px;display:inline-flex;align-items:center;margin:0 var(--space-sm);margin-top:var(--space-lg)}.leaderboard-controls select:hover{background:var(--accent2);transform:translateY(-2px);box-shadow:0 8px 25px #6366f133}.leaderboard-controls select:focus{outline:none;background:var(--accent2);box-shadow:0 0 0 3px #6366f126}.xp-leaderboard-container{background:linear-gradient(135deg,#22c55e1a,#6366f11a,#ec48991a)}.xp-leaderboard-container h2{background:linear-gradient(135deg,#22c55e,#6366f1,#ec4899);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}.xp-leaderboard-container:before{background:linear-gradient(135deg,#22c55e,#6366f1,#ec4899)}.rank-1{background:linear-gradient(135deg,#ffd70033,#ffc1071a)!important;border-left:4px solid #ffd700!important;color:#d4a700!important;font-weight:700!important}.rank-2{background:linear-gradient(135deg,#c0c0c033,#a9a9a91a)!important;border-left:4px solid #c0c0c0!important;color:#9e9e9e!important;font-weight:600!important}.rank-3{background:linear-gradient(135deg,#cd7f3233,#b873331a)!important;border-left:4px solid #cd7f32!important;color:#b8734d!important;font-weight:600!important}.rank-4-to-10{background:linear-gradient(135deg,#6366f11a,#8b5cf60d)!important;border-left:3px solid #6366f1!important;font-weight:500!important}.rank-medal{font-size:1.2em;margin-right:8px;display:inline-block;animation:pulse 2s infinite}.rank-position{font-weight:700;font-size:1.1em;text-shadow:0 1px 2px rgba(0,0,0,.1)}.xp-value{font-weight:600;color:#22c55e;text-shadow:0 1px 2px rgba(34,197,94,.2)}.period-controls{display:flex;gap:var(--space-sm);justify-content:center;margin:var(--space-lg) 0;flex-wrap:wrap}.period-btn{padding:var(--space-sm) var(--space-lg);border:2px solid var(--accent);background:transparent;color:var(--accent);border-radius:var(--radius-lg);cursor:pointer;transition:all var(--transition-normal);font-weight:600;text-transform:uppercase;letter-spacing:.05em;-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);min-height:45px}.period-btn:hover{background:var(--accent);color:#fff;transform:translateY(-2px);box-shadow:var(--shadow-lg)}.period-btn.active{background:linear-gradient(135deg,var(--accent) 0%,var(--accent2) 100%);color:#fff;border-color:var(--accent2);box-shadow:var(--shadow-xl)}.loading-container,.error-container{min-height:300px;display:flex;flex-direction:column;align-items:center;justify-content:center;background:var(--card-bg-glass);border-radius:var(--radius-xl);border:1px solid var(--card-border);-webkit-backdrop-filter:blur(20px);backdrop-filter:blur(20px);margin:var(--space-xl) 0}.loading-spinner{width:50px;height:50px;border:4px solid rgba(99,102,241,.2);border-top:4px solid #6366f1;border-radius:50%;animation:spin 1s linear infinite;margin-bottom:var(--space-md)}.loading-text,.error-text{color:var(--text-color);font-size:1.1rem;font-weight:500;text-align:center}.error-text{color:#ef4444;margin-top:var(--space-md)}.quiz-section{margin-bottom:var(--space-xl);background:var(--leaderboard-glass);border-radius:var(--radius-xl);border:1px solid var(--leaderboard-border);-webkit-backdrop-filter:blur(20px);backdrop-filter:blur(20px);padding:var(--space-lg);box-shadow:var(--shadow-lg)}.quiz-section h3{text-align:center;margin-bottom:var(--space-lg);font-size:1.5rem;font-weight:700;color:var(--text-color);display:flex;align-items:center;justify-content:center;gap:.5rem}@media (max-width: 768px){.leaderboard-table tr:hover td{background:var(--leaderboard-glass)!important;transform:none!important;box-shadow:none!important;transition:none!important}}@media (max-width: 1200px){.leaderboard-container{max-width:95%;margin:var(--space-lg) auto;padding:var(--space-xl) var(--space-lg)}.leaderboard-container h2{font-size:2rem}.leaderboard-table th,.leaderboard-table td{padding:var(--space-sm) var(--space-md);font-size:.95rem}.leaderboard-buttons button{padding:var(--space-sm) var(--space-lg);margin:0 var(--space-xs);font-size:.9rem}}@media (max-width: 768px){.leaderboard-container{margin:var(--space-md) auto;padding:var(--space-lg) var(--space-md);border-radius:var(--radius-xl);animation:none!important}.leaderboard-container h2{font-size:1.8rem;margin-bottom:var(--space-lg);animation:none!important;text-align:center!important;justify-content:center!important;align-items:center!important;display:flex!important;flex-direction:column!important;gap:.5rem!important}.leaderboard-container h2:after{width:60px;height:2px;animation:none!important}.leaderboard-container h2:before{animation:none!important;position:static!important;margin-right:.5rem!important;order:-1!important}.leaderboard-table{margin-top:var(--space-lg);border-radius:var(--radius-lg);overflow-x:auto;animation:none!important;overflow-y:visible!important;border-radius:var(--radius-sm)!important}.leaderboard-table:before{animation:none!important;display:none!important}.leaderboard-table table{overflow:visible!important;transform:none!important}.quiz-section{border-radius:var(--radius-lg)!important;padding:var(--space-md)!important;margin-bottom:var(--space-lg)!important;background:var(--leaderboard-glass)!important;border:1px solid var(--leaderboard-border)!important;-webkit-backdrop-filter:blur(20px)!important;backdrop-filter:blur(20px)!important;box-shadow:var(--shadow-lg)!important}.quiz-section h3{text-align:center!important;justify-content:center!important;font-size:1.3rem;margin-bottom:var(--space-md)}.leaderboard-table tbody tr:nth-child(1) td:first-child:before,.leaderboard-table tbody tr:nth-child(2) td:first-child:before,.leaderboard-table tbody tr:nth-child(3) td:first-child:before{animation:none!important}.leaderboard-table th,.leaderboard-table td{padding:var(--space-sm) var(--space-xs);font-size:.9rem}.leaderboard-table th{font-size:.8rem;padding:var(--space-sm) var(--space-xs)}.leaderboard-table tbody tr:nth-child(1) td:first-child,.leaderboard-table tbody tr:nth-child(2) td:first-child,.leaderboard-table tbody tr:nth-child(3) td:first-child{padding-left:2.2rem;min-width:60px}.leaderboard-table tbody tr:nth-child(1) td:first-child:before,.leaderboard-table tbody tr:nth-child(2) td:first-child:before,.leaderboard-table tbody tr:nth-child(3) td:first-child:before{left:4px;font-size:1rem}.leaderboard-buttons{display:flex;flex-direction:column;gap:var(--space-sm);align-items:center}.leaderboard-buttons button{width:90%;max-width:280px;margin:0;padding:var(--space-md);font-size:.95rem;min-height:48px}.leaderboard-controls{margin-top:var(--space-lg);flex-direction:column;gap:var(--space-md)}.leaderboard-controls select{width:90%;max-width:200px;padding:var(--space-sm);font-size:.9rem;min-height:40px}}@media (max-width: 480px){.leaderboard-container{margin:var(--space-sm) auto;padding:var(--space-md) var(--space-sm);border-radius:var(--radius-lg);animation:none!important}.leaderboard-container h2{font-size:1.5rem;margin-bottom:var(--space-md);animation:none!important;text-align:center!important;justify-content:center!important;align-items:center!important;display:flex!important;flex-direction:column!important;gap:.5rem!important}.leaderboard-container h2:after{width:40px;animation:none!important}.leaderboard-container h2:before{animation:none!important;position:static!important;margin-right:.5rem!important;order:-1!important}.leaderboard-table{margin-top:var(--space-md);border-radius:var(--radius-md);animation:none!important;overflow-y:visible!important;border-radius:var(--radius-xs)!important}.leaderboard-table:before{animation:none!important;display:none!important}.leaderboard-table table{overflow:visible!important;transform:none!important}.quiz-section{border-radius:var(--radius-md)!important;padding:var(--space-sm)!important;margin-bottom:var(--space-md)!important;background:var(--leaderboard-glass)!important;border:1px solid var(--leaderboard-border)!important;-webkit-backdrop-filter:blur(20px)!important;backdrop-filter:blur(20px)!important;box-shadow:var(--shadow-lg)!important}.quiz-section h3{text-align:center!important;justify-content:center!important;font-size:1.2rem;margin-bottom:var(--space-sm)}.leaderboard-table tbody tr:nth-child(1) td:first-child:before,.leaderboard-table tbody tr:nth-child(2) td:first-child:before,.leaderboard-table tbody tr:nth-child(3) td:first-child:before{animation:none!important}.leaderboard-table th,.leaderboard-table td{padding:var(--space-xs) var(--space-sm);font-size:.85rem}.leaderboard-table th{font-size:.75rem;padding:var(--space-xs)}.leaderboard-buttons button{width:95%;padding:var(--space-sm) var(--space-md);font-size:.9rem;min-height:46px}.leaderboard-controls select{width:95%;padding:var(--space-sm);font-size:.85rem;min-height:44px}}@media (max-width: 320px){.leaderboard-container{margin:var(--space-xs) auto;padding:var(--space-sm) var(--space-xs);animation:none!important}.leaderboard-container h2{font-size:1.3rem;margin-bottom:var(--space-sm);animation:none!important;text-align:center!important;justify-content:center!important;align-items:center!important;display:flex!important;flex-direction:column!important;gap:.5rem!important}.leaderboard-container h2:after{animation:none!important}.leaderboard-container h2:before{animation:none!important;position:static!important;margin-right:.5rem!important;order:-1!important}.leaderboard-table{animation:none!important;overflow-y:visible!important}.leaderboard-table:before{animation:none!important;display:none!important}.leaderboard-table table{overflow:visible!important;transform:none!important}.quiz-section{border-radius:var(--radius-sm)!important;padding:var(--space-xs)!important;margin-bottom:var(--space-sm)!important;background:var(--leaderboard-glass)!important;border:1px solid var(--leaderboard-border)!important;-webkit-backdrop-filter:blur(20px)!important;backdrop-filter:blur(20px)!important;box-shadow:var(--shadow-lg)!important}.quiz-section h3{text-align:center!important;justify-content:center!important;font-size:1.1rem;margin-bottom:var(--space-xs)}.leaderboard-table tbody tr:nth-child(1) td:first-child:before,.leaderboard-table tbody tr:nth-child(2) td:first-child:before,.leaderboard-table tbody tr:nth-child(3) td:first-child:before{animation:none!important}.leaderboard-table th,.leaderboard-table td{padding:var(--space-xs);font-size:.8rem}.leaderboard-table th{font-size:.7rem}.leaderboard-buttons button{width:100%;font-size:.85rem;min-height:44px}.leaderboard-controls select{width:100%;font-size:.8rem;min-height:42px}}.themes-container{max-width:1300px;margin:var(--space-lg) auto;padding:var(--space-xl) var(--space-lg);position:relative;min-height:calc(100vh - 100px);padding-bottom:calc(var(--space-xl) + 80px);z-index:1;overflow:visible}.themes-container:before{content:"";position:absolute;top:0;left:0;width:100%;height:100%;background:radial-gradient(circle at 30% 70%,rgba(99,102,241,.04) 0%,transparent 65%),radial-gradient(circle at 70% 30%,rgba(139,92,246,.03) 0%,transparent 65%);pointer-events:none;z-index:-1;animation:float 25s ease-in-out infinite;overflow:hidden;border-radius:inherit}@keyframes float{0%,to{transform:translateY(0) rotate(0) scale(1)}33%{transform:translateY(-15px) rotate(1deg) scale(1.02)}66%{transform:translateY(-25px) rotate(-1deg) scale(1.01)}}.themes-container h2{font-size:2.5rem;font-weight:800;background:linear-gradient(135deg,#6366f1,#8b5cf6,#ec4899);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;text-align:center;margin-bottom:var(--space-2xl);position:relative;letter-spacing:-.03em;text-shadow:0 8px 20px rgba(99,102,241,.2)}.themes-container h2:after{content:"";position:absolute;bottom:-15px;left:50%;transform:translate(-50%);width:100px;height:4px;background:linear-gradient(135deg,#6366f1,#8b5cf6,#ec4899);border-radius:var(--radius-full);box-shadow:0 4px 15px #6366f166,0 0 30px #8b5cf633;animation:pulse 2s ease-in-out infinite}@keyframes pulse{0%,to{opacity:1;transform:translate(-50%) scale(1)}50%{opacity:.8;transform:translate(-50%) scale(1.05)}}.themes-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(350px,1fr));gap:var(--space-2xl);justify-content:center;align-items:stretch;max-width:1200px;margin:0 auto}.theme-card{background:var(--card-bg-glass);backdrop-filter:blur(35px);-webkit-backdrop-filter:blur(35px);border:1px solid var(--card-border);border-radius:var(--radius-2xl);padding:var(--space-xl);box-shadow:var(--shadow-2xl),0 0 50px #6366f11a,inset 0 1px #ffffff26;display:flex;flex-direction:column;justify-content:space-between;transition:all var(--transition-normal);position:relative;overflow:hidden;height:280px;width:100%}.current-badge{display:inline-flex;align-items:center;gap:8px;background:linear-gradient(135deg,#10b981,#059669);color:#fff;padding:8px 16px;border-radius:20px;font-size:.9rem;font-weight:600;text-transform:uppercase;letter-spacing:.5px;box-shadow:0 4px 15px #10b9814d,0 0 20px #10b98133,inset 0 1px #fff3;border:1px solid rgba(255,255,255,.2);position:relative;overflow:hidden}.current-badge: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 .6s ease}.current-badge:hover:before{left:100%}.current-badge .sparkle{font-size:1.1rem;animation:sparkle 2s ease-in-out infinite}@keyframes sparkle{0%,to{transform:scale(1) rotate(0)}50%{transform:scale(1.2) rotate(180deg)}}.theme-card:before{content:"";position:absolute;top:0;left:0;right:0;bottom:0;background:linear-gradient(135deg,#6366f108,#8b5cf605,#f43f5e05);opacity:0;transition:opacity var(--transition-normal);border-radius:var(--radius-2xl)}.theme-card:hover{transform:translateY(-10px) scale(1.03);box-shadow:var(--shadow-2xl),0 0 60px #6366f140,0 0 100px #8b5cf626,inset 0 1px #ffffff40;border-color:var(--accent)}.theme-card:hover:before{opacity:1}.theme-card h3{color:var(--text-light);font-size:1.5rem;font-weight:700;margin-bottom:var(--space-md);background:linear-gradient(135deg,var(--accent) 0%,var(--accent2) 100%);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;position:relative;text-shadow:0 2px 8px rgba(99,102,241,.2)}.theme-card p{color:var(--text-muted);font-size:1rem;line-height:1.7;margin-bottom:var(--space-xl);flex-grow:1;opacity:.9}.theme-card button{background:linear-gradient(135deg,#6366f1,#8b5cf6,#ec4899);color:#fff;border:none;border-radius:var(--radius-xl);padding:var(--space-md) var(--space-2xl);font-size:1rem;font-weight:700;cursor:pointer;transition:all var(--transition-normal);text-transform:uppercase;letter-spacing:.08em;position:relative;overflow:hidden;-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);border:1px solid rgba(255,255,255,.15);box-shadow:0 6px 20px #6366f159,0 0 30px #8b5cf633,inset 0 1px #fff3;min-height:50px;display:flex;align-items:center;justify-content:center}.theme-card button:before{content:"";position:absolute;top:0;left:-100%;width:100%;height:100%;background:linear-gradient(90deg,transparent,rgba(255,255,255,.25),transparent);transition:left var(--transition-slow)}.theme-card button:hover:before{left:100%}.theme-card button:hover{transform:translateY(-3px) scale(1.05);box-shadow:0 12px 30px #6366f180,0 0 50px #8b5cf64d,inset 0 1px #ffffff4d;background:linear-gradient(135deg,#7c3aed,#a855f7,#f97e88);border-color:#ffffff4d}.theme-card button:active{transform:translateY(-1px) scale(1.02);transition:all .1s ease}@media (max-width: 768px){.themes-container{padding:var(--space-md);margin:var(--space-lg) auto}.themes-grid{grid-template-columns:1fr;gap:var(--space-lg)}.theme-card{min-height:240px;padding:var(--space-lg)}.themes-container h2{font-size:2rem}}.themes-container .no-themes{text-align:center;color:var(--text-muted);font-size:1rem;margin-top:var(--space-md)}@media (max-width: 1200px){.themes-container{max-width:95%;padding:var(--space-xl) var(--space-md)}.themes-grid{grid-template-columns:repeat(auto-fit,minmax(320px,1fr));gap:var(--space-xl)}.theme-card{height:270px}}@media (max-width: 768px){.themes-container{padding:var(--space-lg) var(--space-sm);min-height:calc(100vh - 100px);padding-bottom:calc(var(--space-lg) + 100px)}.themes-container 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h4{font-size:1.4rem;font-weight:700;color:var(--text-light);margin-bottom:var(--space-lg);background:var(--gradient-primary);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;position:relative;z-index:1}.tip-category ul{list-style:none;padding:0;position:relative;z-index:1}.tip-category li{padding:var(--space-sm) 0;color:var(--text-color);font-size:1rem;line-height:1.6;position:relative;padding-left:var(--space-lg)}.tip-category li:before{content:"✨";position:absolute;left:0;top:var(--space-sm);font-size:1rem}.problems-list{display:grid;gap:var(--space-lg);margin-bottom:var(--space-2xl)}.problem-item{background:var(--glass-bg);-webkit-backdrop-filter:blur(15px);backdrop-filter:blur(15px);border:1px solid var(--glass-border);border-radius:var(--radius-xl);padding:var(--space-xl);position:relative;overflow:hidden;transition:all 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993px){.help-navigation:after{display:none}}.help-navigation::-webkit-scrollbar,.help-main-content::-webkit-scrollbar{width:6px}.help-navigation::-webkit-scrollbar-track,.help-main-content::-webkit-scrollbar-track{background:var(--glass-bg);border-radius:3px}.help-navigation::-webkit-scrollbar-thumb,.help-main-content::-webkit-scrollbar-thumb{background:var(--gradient-primary);border-radius:3px}.help-navigation::-webkit-scrollbar-thumb:hover,.help-main-content::-webkit-scrollbar-thumb:hover{background:var(--accent-hover)}.enhanced-dashboard{max-width:1400px;margin:0 auto;padding:var(--space-xl);min-height:100vh;background:linear-gradient(135deg,rgba(255,215,0,.03),rgba(255,193,7,.02),transparent 50%);width:100%;max-width:100vw;box-sizing:border-box;overflow-x:hidden}.enhanced-dashboard::-webkit-scrollbar,.dashboard-grid::-webkit-scrollbar,.achievements-list::-webkit-scrollbar,.recommendations-list::-webkit-scrollbar,.enhanced-dashboard *::-webkit-scrollbar,.dashboard-grid 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768px){.connection-status{margin-bottom:var(--space-md);padding:var(--space-sm);border-radius:var(--radius-md);width:100%}.status-indicator{justify-content:center;flex-wrap:nowrap;text-align:center;gap:var(--space-xs);white-space:nowrap}.status-text{font-size:.85rem;text-align:center}.pwa-install-banner{flex-direction:column;text-align:center;gap:var(--space-md);padding:var(--space-lg);margin:var(--space-md) 0;border-radius:var(--radius-lg);width:100%;max-width:100%;overflow:hidden}.pwa-content{flex-direction:column;text-align:center;gap:var(--space-md);width:100%;max-width:100%}.pwa-icon{width:35px;height:35px;font-size:1.4rem;margin:0 auto;flex-shrink:0}.pwa-text{width:100%;max-width:100%}.pwa-text h4{font-size:1rem;margin-bottom:var(--space-sm);word-break:break-word;overflow-wrap:break-word;line-height:1.3;border:none;outline:none;box-shadow:none;position:relative}.pwa-text p{font-size:.85rem;line-height:1.4;opacity:.9;word-break:break-word;overflow-wrap:break-word;max-width:100%}.pwa-install-btn{width:100%;padding:var(--space-lg) var(--space-xl);min-width:unset;font-size:.95rem;font-weight:600;border-radius:var(--radius-lg);box-shadow:0 6px 20px #48bb7840;min-height:48px}.pwa-install-btn:hover{transform:translateY(-1px);box-shadow:0 8px 25px #48bb7859}.pwa-installed-status{flex-direction:column;text-align:center;gap:var(--space-md);padding:var(--space-lg);margin:var(--space-md) 0}.installed-content{flex-direction:column;text-align:center;gap:var(--space-md)}.installed-icon{width:35px;height:35px;font-size:1.4rem;margin:0 auto}.installed-text h4{font-size:1rem;margin-bottom:var(--space-sm);border:none;outline:none;box-shadow:none;position:relative}.installed-text p{font-size:.85rem;line-height:1.4;opacity:.9}}@media (max-width: 480px){.connection-status{padding:var(--space-sm);margin-bottom:var(--space-sm)}.status-indicator{gap:var(--space-xs)}.status-dot{width:8px;height:8px}.status-text{font-size:.75rem}.pwa-install-banner{padding:var(--space-md);margin:var(--space-sm) 0;gap:var(--space-sm)}.pwa-icon{width:40px;height:40px;font-size:1.5rem}.pwa-text h4{font-size:.9rem;margin-bottom:var(--space-xs);word-break:break-word;overflow-wrap:anywhere;line-height:1.3;max-width:100%;text-align:center}.pwa-text p{font-size:.8rem;line-height:1.3;word-break:break-word;overflow-wrap:anywhere;max-width:100%;text-align:center}.pwa-install-btn{padding:var(--space-md) var(--space-lg);font-size:.85rem;min-height:44px}}.features-showcase-card{grid-column:1 / -1;background:linear-gradient(135deg,#667eea14,#764ba20d);-webkit-backdrop-filter:blur(25px);backdrop-filter:blur(25px);padding:var(--space-xl);border-radius:var(--radius-xl);border:none;box-shadow:var(--shadow-xl),0 0 30px #667eea1a;transition:all var(--transition-normal);margin-top:var(--space-lg)}.features-showcase-card:hover{transform:translateY(-2px);box-shadow:var(--shadow-2xl),0 0 40px #667eea26}.features-showcase-card h3{font-size:1.8rem;font-weight:700;color:var(--text-color);margin:0 0 var(--space-xl) 0;text-align:center;background:linear-gradient(135deg,#667eea,#764ba2);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}.features-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:var(--space-lg);margin-bottom:var(--space-xl)}.feature-card{background:linear-gradient(135deg,#ffffff14,#ffffff0a);-webkit-backdrop-filter:blur(20px);backdrop-filter:blur(20px);padding:var(--space-lg);border-radius:var(--radius-lg);border:none;box-shadow:0 8px 25px #0000001a;transition:all var(--transition-normal);cursor:pointer;position:relative;overflow:hidden;display:flex;align-items:center;gap:var(--space-md)}.feature-card:before{content:"";position:absolute;top:0;left:0;right:0;height:0;border-radius:var(--radius-lg) var(--radius-lg) 0 0}.feature-card.ai-feature:before{background:linear-gradient(90deg,#667eea,#764ba2)}.feature-card.realtime-feature:before{background:linear-gradient(90deg,#f093fb,#f5576c)}.feature-card.social-feature:before{background:linear-gradient(90deg,#4facfe,#00f2fe)}.feature-card.gamification-feature:before{background:linear-gradient(90deg,#43e97b,#38f9d7)}.feature-card:hover{transform:translateY(-5px) scale(1.02);box-shadow:0 15px 35px #00000026}.feature-icon{font-size:3rem;display:flex;align-items:center;justify-content:center;width:70px;height:70px;border-radius:var(--radius-lg);flex-shrink:0;box-shadow:0 8px 25px #0000001a}.ai-feature .feature-icon{background:linear-gradient(135deg,#667eea,#764ba2)}.realtime-feature .feature-icon{background:linear-gradient(135deg,#f093fb,#f5576c)}.social-feature .feature-icon{background:linear-gradient(135deg,#4facfe,#00f2fe)}.gamification-feature .feature-icon{background:linear-gradient(135deg,#43e97b,#38f9d7)}.feature-content{flex:1}.feature-content h4{font-size:1.2rem;font-weight:600;color:var(--text-color);margin:0 0 var(--space-sm) 0}.feature-content p{color:var(--text-secondary);margin:0 0 var(--space-md) 0;font-size:.9rem;line-height:1.5}.feature-tags{display:flex;gap:var(--space-xs);flex-wrap:wrap}.feature-tag{padding:var(--space-xs) var(--space-sm);background:#ffffff1a;border:none;border-radius:var(--radius-sm);font-size:.75rem;font-weight:500;color:var(--text-secondary);white-space:nowrap}.feature-arrow{font-size:1.5rem;color:var(--text-secondary);transition:all var(--transition-normal)}.feature-card:hover .feature-arrow{transform:translate(5px);color:var(--text-color)}@media (max-width: 768px){.features-showcase-card{grid-column:1 / -1;padding:var(--space-lg);margin-top:var(--space-md);width:100%}.features-grid{grid-template-columns:1fr;gap:var(--space-md)}.feature-card{padding:var(--space-md);flex-direction:row;text-align:left;gap:var(--space-md);width:100%}.feature-icon{width:45px;height:45px;font-size:1.8rem}.feature-content{text-align:left}.feature-tags{justify-content:flex-start}.feature-arrow{display:none}}@media (max-width: 480px){.features-showcase-card h3{font-size:clamp(1.1rem,4vw,1.3rem)}.feature-card{padding:var(--space-sm);gap:var(--space-sm)}.feature-icon{width:35px;height:35px;font-size:1.3rem}.feature-content h4{font-size:.9rem}.feature-content p{font-size:.75rem}.feature-tag{font-size:.6rem}}.achievement-system{max-width:1400px;margin:0 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h1{font-size:2.8rem;font-weight:800;background:var(--gradient-primary);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;margin:0}.progress-overview{display:flex;align-items:center;gap:var(--space-lg)}.completion-circle{position:relative;display:flex;align-items:center;justify-content:center}.progress-ring{transform:rotate(-90deg)}.percentage-text{position:absolute;font-size:1rem;font-weight:700;color:var(--text-color)}.progress-info{display:flex;flex-direction:column;gap:var(--space-xs)}.progress-main{font-size:1.2rem;font-weight:700;color:var(--text-color);margin:0}.progress-sub{color:var(--text-secondary);margin:0;font-size:.9rem}.filter-controls{display:flex;gap:var(--space-sm);background:#ffffff0d;padding:var(--space-xs);border-radius:var(--radius-lg);border:1px solid rgba(255,255,255,.1)}.filter-btn{padding:var(--space-sm) 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var(--card-border);display:flex;align-items:center;gap:var(--space-md)}.category-achievements{display:grid;grid-template-columns:repeat(auto-fill,minmax(380px,1fr));gap:var(--space-lg)}.achievement-card{background:#ffffff08;-webkit-backdrop-filter:blur(15px);backdrop-filter:blur(15px);border-radius:var(--radius-xl);border:2px solid rgba(255,255,255,.1);padding:var(--space-xl);transition:all var(--transition-normal);position:relative;overflow:hidden;min-height:140px;display:flex;gap:var(--space-lg)}.achievement-card.unlocked{background:#6366f114}.achievement-card.locked{opacity:.7;filter:grayscale(.3)}.achievement-card:hover{transform:translateY(-2px);background:#ffffff0f}.achievement-icon{font-size:2.5rem;display:flex;align-items:center;justify-content:center;width:70px;height:70px;background:var(--gradient-primary);border-radius:var(--radius-lg);box-shadow:var(--shadow-lg);flex-shrink:0}.achievement-content{flex:1;display:flex;flex-direction:column;gap:var(--space-sm)}.achievement-title{font-size:1.4rem;font-weight:700;color:var(--text-color);margin:0}.achievement-description{color:var(--text-secondary);margin:0;font-size:1rem;line-height:1.5;flex:1}.achievement-meta{display:flex;align-items:center;justify-content:space-between;gap:var(--space-md);margin-top:auto}.rarity{padding:var(--space-xs) var(--space-sm);border-radius:var(--radius-sm);font-size:.75rem;font-weight:700;text-transform:uppercase;letter-spacing:.5px}.rarity.common{background:#9ca3af33;color:#9ca3af}.rarity.rare{background:#3b82f633;color:#3b82f6}.rarity.epic{background:#8b5cf633;color:#8b5cf6}.rarity.legendary{background:#f59e0b33;color:#f59e0b}.progress-bar{width:140px;height:8px;background:#ffffff1a;border-radius:var(--radius-sm);overflow:hidden;position:relative}.progress-fill{height:100%;background:var(--gradient-primary);border-radius:var(--radius-sm);transition:width .8s ease;position:relative}.progress-text{position:absolute;top:-22px;right:0;color:var(--text-secondary);font-weight:600;font-size:.8rem}.unlock-badge{position:absolute;top:var(--space-sm);right:var(--space-sm);width:32px;height:32px;background:var(--gradient-primary);border-radius:50%;display:flex;align-items:center;justify-content:center;color:#fff;font-weight:700;font-size:1.1rem;box-shadow:var(--shadow-lg)}.achievement-loading,.achievement-error{display:flex;flex-direction:column;align-items:center;justify-content:center;min-height:50vh;text-align:center;padding:var(--space-2xl)}.loading-spinner{width:50px;height:50px;border:4px solid rgba(255,255,255,.1);border-left:4px solid var(--accent);border-radius:50%;animation:spin 1s linear infinite;margin-bottom:var(--space-lg)}.achievement-error{color:var(--text-secondary)}.achievement-error p:first-child{color:#ff6b6b;font-weight:600;margin-bottom:var(--space-sm)}.achievement-notification{position:fixed;top:var(--space-xl);right:var(--space-xl);background:var(--card-bg-glass);-webkit-backdrop-filter:blur(25px);backdrop-filter:blur(25px);border:1px solid var(--card-border);border-radius:var(--radius-xl);padding:var(--space-lg);box-shadow:var(--shadow-2xl);z-index:1000;max-width:400px;display:flex;align-items:center;gap:var(--space-md)}.notification-content h4{margin:0 0 var(--space-xs) 0;color:var(--text-color);font-weight:700}.notification-content p{margin:0;color:var(--text-secondary);font-size:.9rem}.notification-close{background:none;border:none;color:var(--text-secondary);font-size:1.5rem;cursor:pointer;padding:var(--space-xs);border-radius:var(--radius-sm);transition:all var(--transition-normal)}.notification-close:hover{background:#ffffff1a;color:var(--text-color)}@media (max-width: 1200px){.category-achievements{grid-template-columns:repeat(auto-fill,minmax(320px,1fr))}}@media (max-width: 768px){.achievement-system,.achievement-header{padding:var(--space-lg)}.header-content{flex-direction:column;text-align:center;gap:var(--space-md)}.header-content h1{font-size:2.2rem}.progress-overview{flex-direction:column;gap:var(--space-md)}.category-achievements{grid-template-columns:1fr}.achievement-card{padding:var(--space-lg);min-height:120px}.achievement-icon{width:60px;height:60px;font-size:2rem}.achievement-title{font-size:1.2rem}.progress-bar{width:100px}}@media (max-width: 480px){.achievement-system,.achievement-header{padding:var(--space-md)}.header-content h1{font-size:1.8rem}.achievement-card{padding:var(--space-md);flex-direction:column;text-align:center;gap:var(--space-md)}.achievement-icon{width:50px;height:50px;font-size:1.8rem;align-self:center}.achievement-meta{justify-content:center;flex-wrap:wrap}.filter-controls{flex-wrap:wrap}.filter-btn{flex:1;min-width:80px}.notification-content{flex-direction:column;text-align:center}}.friends-system{max-width:1200px;margin:0 auto;padding:20px;background:var(--card-bg);border-radius:15px;box-shadow:0 4px 20px #0000001a}.friends-header{text-align:center;margin-bottom:30px}.friends-header h2{color:var(--text-primary);margin-bottom:10px;font-size:1.5em}.friends-header p{color:var(--text-secondary);font-size:1.1em}.friends-tabs{display:flex;justify-content:center;margin-bottom:30px;gap:10px;padding:0 5px;flex-wrap:wrap}.tab-button{background:none;border:2px solid var(--border-color);padding:12px 20px;cursor:pointer;color:var(--text-secondary);font-weight:500;border-radius:25px;transition:all 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#2ed57380}.status-indicator.offline{background:#a4b0be}.friend-actions{display:flex;gap:.5rem;position:absolute;top:10px;right:10px;z-index:2}.remove-friend-btn{position:static;background:#ff4757;color:#fff;border:none;border-radius:50%;width:24px;height:24px;cursor:pointer;font-size:14px;opacity:0;transition:all .3s ease}.friend-card:hover .remove-friend-btn{opacity:1}.remove-friend-btn:hover{background:#ff3742;transform:scale(1.1)}.block-user-btn{position:static;background:#ff6b6b;color:#fff;border:none;border-radius:8px;padding:4px 8px;cursor:pointer;font-size:10px;opacity:0;transition:all .3s ease;font-weight:500}.friend-card:hover .block-user-btn{opacity:1}.block-user-btn:hover{background:#ff5252;transform:scale(1.05)}.unblock-user-btn{background:#5dade2;color:#fff;border:none;border-radius:20px;padding:8px 16px;cursor:pointer;font-size:12px;transition:all .3s 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#0000001a}.request-avatar{width:40px;height:40px;border-radius:50%;background:linear-gradient(135deg,var(--primary-color),var(--secondary-color));display:flex;align-items:center;justify-content:center;color:#fff;font-weight:700}.request-info{flex:1}.request-info h4{margin:0 0 3px;color:var(--text-primary)}.request-time{color:var(--text-secondary);font-size:.85em;margin:0}.request-actions{display:flex;gap:10px}.accept-btn,.decline-btn{padding:8px 16px;border:none;border-radius:6px;cursor:pointer;font-weight:500;transition:all .3s ease;touch-action:manipulation;-webkit-tap-highlight-color:transparent}.accept-btn{background:#2ed573;color:#fff}.accept-btn:hover{background:#26d063;transform:translateY(-1px)}.decline-btn{background:#ff4757;color:#fff}.decline-btn:hover{background:#ff3742;transform:translateY(-1px)}.pending-label{background:#ffa726;color:#fff;padding:4px 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h1{font-size:2.2rem}.menu-sections{grid-template-columns:1fr;gap:20px}.settings-grid{grid-template-columns:1fr}.lobby-content{grid-template-columns:1fr;gap:30px;padding:20px}.players-grid{grid-template-columns:1fr}.question-content{padding:30px 20px}.question-content h2{font-size:1.3rem}.timer-circle{width:50px;height:50px;font-size:1.2rem}.option-btn{padding:15px;font-size:.9rem}.quiz-results{padding:20px;margin:0 10px}.leaderboard-item{flex-direction:column;text-align:center;gap:10px}.player-info{flex-direction:column;gap:10px}}@media (max-width: 480px){.real-time-quiz .menu-header h1{font-size:1.8rem!important}.real-time-quiz .player-stats{padding:20px!important}.real-time-quiz .stats-grid{grid-template-columns:1fr!important;gap:15px!important}.real-time-quiz .stat{padding:20px!important}.real-time-quiz .stat-value{font-size:1.8rem!important}.real-time-quiz 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.stat{border-image:none!important;border-image-source:none!important;background-image:none!important;background-attachment:initial!important;min-height:auto!important;height:auto!important;width:auto!important;max-width:none!important;flex:none!important;flex-grow:0!important;flex-shrink:1!important;flex-basis:auto!important}.real-time-quiz .stat p,.real-time-quiz .stat span,.real-time-quiz .stat div{margin:0!important;padding:0!important}.real-time-quiz .stat:hover{animation:none!important;background:#fff3!important;border-color:#ffffff4d!important;transform:translateY(-2px)!important;box-shadow:0 4px 15px #0000001a!important;scale:none!important;rotate:none!important}:root{--gamification-primary: linear-gradient(135deg, #667eea 0%, #764ba2 100%);--gamification-secondary: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);--gamification-accent: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);--gamification-success: linear-gradient(135deg, #43e97b 0%, #38f9d7 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p{color:var(--text-secondary);margin:0}.empty-state,.no-challenge-card{display:flex;flex-direction:column;align-items:center;justify-content:center;padding:3rem 2rem;text-align:center;background:var(--gamification-glass);border-radius:15px;border:1px solid var(--gamification-border);-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);animation:floatIn .6s ease}@keyframes floatIn{0%{opacity:0;transform:translateY(2rem)}to{opacity:1;transform:translateY(0)}}.empty-icon,.no-challenge-icon{font-size:4rem;margin-bottom:1rem;animation:bounce 2s ease-in-out infinite}@keyframes bounce{0%,20%,50%,80%,to{transform:translateY(0)}40%{transform:translateY(-10px)}60%{transform:translateY(-5px)}}.empty-state h3,.no-challenge-card h3{color:var(--text-primary);margin-bottom:.5rem;font-size:1.5rem}.empty-state p,.no-challenge-card p{color:var(--text-secondary);margin:0}.admin-actions{margin-top:1.5rem;display:flex;gap:1rem;flex-wrap:wrap;justify-content:center}.create-sample-btn,.cleanup-btn{padding:.75rem 1.5rem;border:none;border-radius:10px;cursor:pointer;transition:all .3s ease;font-weight:500;color:#fff}.create-sample-btn{background:var(--gamification-success)}.create-sample-btn:hover{transform:translateY(-2px);box-shadow:0 8px 25px #43e97b66}.cleanup-btn{background:var(--gamification-error)}.cleanup-btn:hover{transform:translateY(-2px);box-shadow:0 8px 25px #ff572266}.challenges-container{display:flex;flex-direction:column;gap:1.5rem;max-height:600px;min-height:400px;overflow-y:auto;overflow-x:hidden;padding-right:.5rem;padding-bottom:1rem;-webkit-overflow-scrolling:touch;scroll-behavior:smooth;position:relative;height:auto;contain:layout 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infinite}.challenge-rewards{margin-bottom:1.5rem}.challenge-rewards h4{color:var(--text-primary);margin-bottom:.75rem;font-size:1.1rem}.rewards-list{display:flex;gap:1rem;flex-wrap:wrap}.reward-item{display:flex;align-items:center;gap:.5rem;background:var(--hover-bg);padding:.5rem 1rem;border-radius:25px;transition:all .3s ease}.reward-item:hover{background:var(--gamification-accent);color:#fff;transform:translateY(-2px)}.reward-icon{font-size:1.2rem}.reward-text{font-weight:500;font-size:.9rem}.challenge-actions{display:flex;gap:1rem;align-items:center;margin-bottom:1.5rem;flex-wrap:wrap}.completed-section{flex:1}.completed-btn{background:var(--gamification-success);color:#fff;border:none;padding:1rem 2rem;border-radius:12px;font-weight:600;cursor:default;position:relative;overflow:hidden;width:100%}.completed-btn:before{content:"";position:absolute;top:0;left:-100%;width:100%;height:100%;background:var(--shimmer);animation:completedShimmer 3s infinite}@keyframes 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progressPulse{0%,to{opacity:1}50%{opacity:.8}}.reset-timer{margin-top:.5rem;text-align:center}.reset-timer small{color:var(--text-secondary);font-size:.8rem;padding:.3rem .6rem;background:#ffffff1a;border-radius:12px;-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px)}.reset-continue-section{text-align:center;padding:1rem;background:linear-gradient(135deg,#ffa7261a,#fb8c001a);border-radius:12px;border:1px solid rgba(255,167,38,.2);margin-bottom:1rem}.reset-info{margin-bottom:1rem}.reset-message{color:var(--warning-color);font-weight:600;font-size:.9rem;display:flex;align-items:center;justify-content:center;gap:.5rem}.join-challenge-btn.reset-continue{background:linear-gradient(135deg,#ffa726,#fb8c00);box-shadow:0 4px 15px #ffa72666;transform:none;animation:resetButtonGlow 2s infinite alternate}@keyframes resetButtonGlow{0%{box-shadow:0 4px 15px #ffa72666}to{box-shadow:0 6px 25px 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15px #22c55e4d}.easy-btn:hover{transform:translateY(-2px);box-shadow:0 6px 20px #22c55e66}.error-state{text-align:center;padding:var(--space-3xl);background:#ffffff0d;backdrop-filter:blur(20px);-webkit-backdrop-filter:blur(20px);border-radius:var(--radius-2xl);border:1px solid rgba(255,255,255,.1);box-shadow:var(--shadow-2xl);color:var(--text-color)}.error-state h2{font-size:2rem;font-weight:700;margin-bottom:var(--space-md);color:#ef4444}.error-state p{font-size:1.1rem;color:var(--text-secondary);margin:0}.progress-indicator{display:flex;justify-content:center;align-items:center;margin-bottom:var(--space-lg);padding:var(--space-md);background:#ffffff1a;border-radius:var(--radius-lg);backdrop-filter:blur(10px);-webkit-backdrop-filter:blur(10px)}.progress-text{color:#fff;font-weight:600;font-size:.9rem}.quiz-progress-text{color:#a78bfa;font-weight:500;font-size:.8rem;margin-left:var(--space-sm);padding:.25rem .5rem;background:#a78bfa1a;border-radius:var(--radius-sm);border:1px solid rgba(167,139,250,.2)}@media (max-width: 768px){.spaced-repetition{padding:var(--space-lg)}.spaced-repetition-header h2{font-size:2rem}.review-card{padding:var(--space-lg)}.button-group{flex-direction:column;align-items:center}.action-button{width:100%;max-width:200px}.question-text{font-size:1.1rem}.option-item{padding:var(--space-sm)}.option-letter{width:35px;height:35px;font-size:.9rem;margin-right:var(--space-sm)}.option-text{font-size:.95rem}.correct-badge{width:20px;height:20px;font-size:.7rem;top:-6px;right:-6px}}@media (max-width: 480px){.spaced-repetition{padding:var(--space-md)}.spaced-repetition-header h2{font-size:1.8rem}.review-card{padding:var(--space-md)}.quiz-title{font-size:1.3rem}.question-text{font-size:1rem}.option-item{padding:var(--space-xs)}.option-letter{width:30px;height:30px;font-size:.8rem;margin-right:var(--space-xs)}.option-text{font-size:.9rem}.correct-badge{width:18px;height:18px;font-size:.6rem;top:-5px;right:-5px}.answer-label{font-size:1rem;margin-bottom:var(--space-md)}}.advanced-analytics-container{min-height:100vh;background:var(--bg-dark);color:var(--text-color);font-family:var(--font-sans);padding:var(--space-lg);overflow-x:hidden}.loading-container{display:flex;flex-direction:column;align-items:center;justify-content:center;min-height:60vh;text-align:center}.loading-spinner{width:48px;height:48px;border:4px solid var(--border-color);border-top:4px solid var(--accent);border-radius:50%;animation:spin 1s linear infinite;margin-bottom:var(--space-md)}.loading-text{color:var(--text-muted);font-size:1.1rem;font-weight:500}@keyframes spin{0%{transform:rotate(0)}to{transform:rotate(360deg)}}.error-container,.no-data-container{display:flex;flex-direction:column;align-items:center;justify-content:center;min-height:60vh;text-align:center;padding:var(--space-xl)}.error-icon,.no-data-icon{font-size:4rem;margin-bottom:var(--space-lg);opacity:.8}.error-title,.no-data-title{font-size:1.5rem;font-weight:600;color:var(--text-light);margin-bottom:var(--space-sm)}.error-message,.no-data-message{color:var(--text-muted);font-size:1rem;margin-bottom:var(--space-lg);max-width:400px;line-height:1.6}.retry-button{background:var(--gradient-primary);color:#fff;border:none;padding:var(--space-sm) var(--space-lg);border-radius:var(--radius-lg);font-weight:600;cursor:pointer;transition:all var(--transition-normal);box-shadow:var(--shadow-md)}.retry-button:hover{transform:translateY(-2px);box-shadow:var(--shadow-lg)}.analytics-header{display:flex;justify-content:space-between;align-items:flex-start;margin-bottom:var(--space-xl);padding:var(--space-lg);background:var(--card-bg);border-radius:var(--radius-xl);border:1px solid var(--card-border);-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px)}.header-content{flex:1}.analytics-title{font-size:2.5rem;font-weight:700;color:var(--text-light);margin-bottom:var(--space-sm);background:var(--gradient-primary);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}.analytics-subtitle{color:var(--text-muted);font-size:1.1rem;line-height:1.6;max-width:500px}.header-stats{display:flex;gap:var(--space-md);flex-wrap:wrap}.stat-card{background:var(--glass-bg);border:1px solid var(--glass-border);border-radius:var(--radius-lg);padding:var(--space-md);text-align:center;min-width:120px;-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px)}.stat-value{font-size:1.8rem;font-weight:700;color:var(--accent);margin-bottom:var(--space-xs)}.stat-label{font-size:.9rem;color:var(--text-muted);font-weight:500}.tab-navigation{display:flex;gap:var(--space-sm);margin-bottom:var(--space-xl);background:var(--card-bg);padding:var(--space-sm);border-radius:var(--radius-xl);border:1px solid var(--card-border);overflow-x:auto;scrollbar-width:none;-ms-overflow-style:none}.tab-navigation::-webkit-scrollbar{display:none}.tab-button{background:transparent;border:none;color:var(--text-muted);padding:var(--space-sm) var(--space-lg);border-radius:var(--radius-lg);font-weight:600;cursor:pointer;transition:all var(--transition-normal);white-space:nowrap;font-size:.95rem;display:flex;align-items:center;gap:var(--space-xs)}.tab-button:hover{background:var(--accent-light);color:var(--accent);transform:translateY(-1px)}.tab-button.active{background:var(--gradient-primary);color:#fff;box-shadow:var(--shadow-md)}.tab-content{min-height:60vh}.overview-grid{display:grid;grid-template-columns:1fr 2fr;gap:var(--space-xl);margin-bottom:var(--space-xl)}.overview-card{background:var(--card-bg);border:1px solid var(--card-border);border-radius:var(--radius-xl);padding:var(--space-lg);-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px)}.card-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:var(--space-lg)}.card-title{font-size:1.3rem;font-weight:600;color:var(--text-light)}.card-icon{font-size:1.5rem;opacity:.8}.performance-metrics{display:flex;flex-direction:column;gap:var(--space-lg)}.metric-item{display:flex;justify-content:space-between;align-items:center;padding:var(--space-md);background:var(--glass-bg);border-radius:var(--radius-lg);border:1px solid var(--glass-border)}.metric-label{color:var(--text-muted);font-weight:500;font-size:.95rem}.metric-value{font-size:1.2rem;font-weight:700;color:var(--accent)}.charts-section{display:flex;flex-direction:column;gap:var(--space-lg)}.chart-card{background:var(--card-bg);border:1px solid var(--card-border);border-radius:var(--radius-xl);padding:var(--space-lg);-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px)}.chart-title{font-size:1.2rem;font-weight:600;color:var(--text-light);margin-bottom:var(--space-lg);text-align:center}.chart-container{height:300px;position:relative}.cognitive-section,.learning-section,.insights-section{margin-bottom:var(--space-xl)}.section-header{text-align:center;margin-bottom:var(--space-xl)}.section-title{font-size:2rem;font-weight:700;color:var(--text-light);margin-bottom:var(--space-sm);background:var(--gradient-primary);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}.section-subtitle{color:var(--text-muted);font-size:1.1rem;max-width:600px;margin:0 auto;line-height:1.6}.metrics-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(300px,1fr));gap:var(--space-lg)}.metric-card{background:var(--card-bg);border:1px solid var(--card-border);border-radius:var(--radius-xl);padding:var(--space-lg);-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);transition:all var(--transition-normal)}.metric-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-xl);border-color:var(--accent)}.metric-card-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:var(--space-lg);padding-bottom:var(--space-md);border-bottom:1px solid var(--border-color)}.metric-card-title{font-size:1.1rem;font-weight:600;color:var(--text-light)}.metric-card-date{font-size:.85rem;color:var(--text-muted)}.metric-card-content{display:flex;flex-direction:column;gap:var(--space-md)}.metric-row{display:flex;justify-content:space-between;align-items:center}.performance-indicator{margin-top:var(--space-md);padding-top:var(--space-md);border-top:1px solid var(--border-color);text-align:center}.indicator-label{font-size:.9rem;color:var(--text-muted);margin-bottom:var(--space-xs)}.indicator-value{font-size:1rem;font-weight:600}.learning-grid{display:grid;grid-template-columns:1fr 1fr;gap:var(--space-xl)}.learning-chart-card{background:var(--card-bg);border:1px solid var(--card-border);border-radius:var(--radius-xl);padding:var(--space-lg);-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px)}.learning-metrics{display:flex;flex-direction:column;gap:var(--space-lg)}.learning-metric-card{background:var(--card-bg);border:1px solid var(--card-border);border-radius:var(--radius-xl);padding:var(--space-lg);-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);transition:all var(--transition-normal)}.learning-metric-card:hover{transform:translateY(-2px);box-shadow:var(--shadow-lg)}.learning-metric-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:var(--space-lg);padding-bottom:var(--space-md);border-bottom:1px solid var(--border-color)}.learning-metric-title{font-size:1.1rem;font-weight:600;color:var(--text-light)}.learning-metric-date{font-size:.85rem;color:var(--text-muted)}.learning-metric-content{display:flex;flex-direction:column;gap:var(--space-lg)}.learning-metric-row{display:flex;flex-direction:column;gap:var(--space-sm)}.learning-metric-label{font-size:.9rem;color:var(--text-muted);font-weight:500}.learning-metric-progress{position:relative;background:var(--glass-bg);border-radius:var(--radius-full);height:8px;overflow:hidden}.progress-bar{height:100%;border-radius:var(--radius-full);transition:width var(--transition-slow);position:relative}.progress-value{position:absolute;right:var(--space-sm);top:50%;transform:translateY(-50%);font-size:.8rem;font-weight:600;color:var(--text-light);text-shadow:0 1px 2px rgba(0,0,0,.5)}.insights-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:var(--space-lg)}.insight-card{background:var(--card-bg);border:1px solid var(--card-border);border-radius:var(--radius-xl);padding:var(--space-lg);-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);transition:all var(--transition-normal);text-align:center}.insight-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-xl);border-color:var(--accent)}.insight-icon{font-size:2.5rem;margin-bottom:var(--space-md);opacity:.9}.insight-title{font-size:1.2rem;font-weight:600;color:var(--text-light);margin-bottom:var(--space-sm)}.insight-description{color:var(--text-muted);line-height:1.6;font-size:.95rem}@media (max-width: 1200px){.overview-grid,.learning-grid{grid-template-columns:1fr}}@media (max-width: 768px){.advanced-analytics-container{padding:var(--space-md)}.analytics-header{flex-direction:column;gap:var(--space-lg);text-align:center}.analytics-title{font-size:2rem}.header-stats{justify-content:center}.tab-navigation{flex-wrap:wrap;justify-content:center}.tab-button{font-size:.9rem;padding:var(--space-sm) var(--space-md)}.metrics-grid,.insights-grid{grid-template-columns:1fr}.chart-container{height:250px}}@media (max-width: 480px){.advanced-analytics-container{padding:var(--space-sm)}.analytics-title{font-size:1.8rem}.analytics-subtitle{font-size:1rem}.stat-card{min-width:100px;padding:var(--space-sm)}.stat-value{font-size:1.5rem}.metric-card,.learning-metric-card,.insight-card{padding:var(--space-md)}.chart-container{height:200px}}@media (prefers-color-scheme: dark){.advanced-analytics-container{background:var(--bg-dark)}}.advanced-analytics-container *{transition:all var(--transition-normal)}.advanced-analytics-container::-webkit-scrollbar{width:8px}.advanced-analytics-container::-webkit-scrollbar-track{background:var(--bg-secondary);border-radius:var(--radius-full)}.advanced-analytics-container::-webkit-scrollbar-thumb{background:var(--accent);border-radius:var(--radius-full)}.advanced-analytics-container::-webkit-scrollbar-thumb:hover{background:var(--accent-hover)}