.tile-node{position:absolute;width:25%;height:25%;padding:6px;box-sizing:border-box;transition:left 0.12s ease-in-out,top 0.12s ease-in-out;z-index:2}.tile-pop{animation:tile-pop-anim 0.12s ease-in-out forwards}.tile-merge{animation:tile-merge-anim 0.12s ease-in-out forwards;z-index:3}@keyframes tile-pop-anim{0%{transform:scale(0)}100%{transform:scale(1)}}@keyframes tile-merge-anim{0%{transform:scale(1)}50%{transform:scale(1.18)}100%{transform:scale(1)}}.game2048-container-grid{display:grid !important;grid-template-columns:1.2fr 1fr !important}@media (max-width:800px){.game2048-container-grid{grid-template-columns:1fr !important;min-height:auto !important}.workspace-panel{border-right:none !important;border-bottom:1px solid rgba(15,23,42,0.06);padding:16px !important}.workspace-panel:last-child{border-bottom:none !important}#game-grid-container{max-width:100% !important;width:100% !important}}.fc-container{max-width:1200px;width:100%;margin:0 auto;display:flex;flex-direction:column;gap:24px}.fc-layout{display:grid;grid-template-columns:280px 1fr;gap:24px;align-items:start}@media (max-width:768px){.fc-layout{grid-template-columns:1fr;gap:16px}}.fc-sidebar{display:flex;flex-direction:column;gap:16px;background:#ffffff;border:1px solid rgba(15,23,42,0.08);border-radius:16px;padding:20px;box-shadow:var(--shadow-sm);position:sticky;top:94px;max-height:520px}.fc-sidebar-title{font-size:1.1rem;font-weight:700;color:var(--text-primary);border-bottom:1px solid rgba(15,23,42,0.06);padding-bottom:10px;margin-bottom:4px;flex-shrink:0}.fc-topic-list{display:flex;flex-direction:column;gap:10px;max-height:380px;overflow-y:auto;padding-right:4px;flex-grow:1}.fc-topic-list::-webkit-scrollbar{width:6px}.fc-topic-list::-webkit-scrollbar-track{background:rgba(15,23,42,0.02);border-radius:3px}.fc-topic-list::-webkit-scrollbar-thumb{background:rgba(79,70,229,0.2);border-radius:3px}.fc-topic-list::-webkit-scrollbar-thumb:hover{background:rgba(79,70,229,0.4)}.fc-topic-card{background:rgba(15,23,42,0.02);border:1px solid rgba(15,23,42,0.05);border-radius:8px;padding:12px;cursor:pointer;transition:all var(--transition-fast);display:flex;flex-direction:column;gap:6px}.fc-topic-card:hover{background:rgba(15,23,42,0.04);border-color:rgba(15,23,42,0.12)}.fc-topic-card.active{background:rgba(79,70,229,0.05);border-color:var(--primary-color);box-shadow:0 0 0 1px var(--primary-color)}.fc-topic-info{display:flex;justify-content:space-between;align-items:center;gap:8px}.fc-topic-name{font-size:0.9rem;font-weight:600;color:var(--text-primary);white-space:nowrap;overflow:hidden;text-overflow:ellipsis;max-width:150px}.fc-topic-stats{font-size:0.75rem;color:var(--text-muted);font-weight:500;flex-shrink:0}.fc-topic-progress-container{height:5px;background:rgba(15,23,42,0.04);border-radius:3px;overflow:hidden;width:100%}.fc-topic-progress-bar{height:100%;background:var(--primary-gradient);border-radius:3px;transition:width var(--transition-normal)}.fc-topic-performance{display:flex;justify-content:space-between;align-items:center;font-size:0.75rem;margin-top:2px}.fc-perf-label{color:var(--text-muted)}.fc-perf-value{font-weight:700}.fc-perf-good{color:#10b981}.fc-perf-average{color:#f59e0b}.fc-perf-bad{color:#ef4444}.fc-perf-none{color:var(--text-muted)}@media (max-width:768px){.fc-sidebar{position:static !important;max-height:none !important;padding:12px;width:100% !important;max-width:100% !important;box-sizing:border-box !important;overflow:hidden !important}.fc-topic-list{display:flex !important;flex-direction:row !important;flex-wrap:nowrap !important;overflow-x:auto !important;overflow-y:hidden !important;max-height:none !important;padding-bottom:8px;scroll-snap-type:x mandatory;-webkit-overflow-scrolling:touch;gap:12px !important;padding-right:0 !important}.fc-topic-list::-webkit-scrollbar{display:none !important}.fc-topic-card{min-width:180px;scroll-snap-align:start;flex-shrink:0}}.fc-card-perspective{perspective:1200px;-webkit-perspective:1200px;width:100%;height:440px;position:relative}.fc-card-inner{width:100%;height:100%;position:relative;transform-style:preserve-3d;-webkit-transform-style:preserve-3d;transition:transform 0.6s cubic-bezier(0.4,0,0.2,1)}.fc-card-inner.flipped{transform:rotateY(180deg);-webkit-transform:rotateY(180deg)}.fc-card-face{position:absolute;width:100%;height:100%;backface-visibility:hidden;-webkit-backface-visibility:hidden;border-radius:20px;padding:32px;display:flex;flex-direction:column;justify-content:space-between;background:rgba(255,255,255,0.95);backdrop-filter:blur(20px);-webkit-backdrop-filter:blur(20px);border:1px solid rgba(255,255,255,0.6);box-shadow:0 12px 36px rgba(79,70,229,0.06),0 2px 10px rgba(15,23,42,0.04);border-top:5px solid var(--primary-color);box-sizing:border-box;transition:border-color var(--transition-normal);transform:translate3d(0,0,0);-webkit-transform:translate3d(0,0,0);transform-style:preserve-3d;-webkit-transform-style:preserve-3d}.fc-card-front{transform:rotateY(0deg) translate3d(0,0,0);-webkit-transform:rotateY(0deg) translate3d(0,0,0)}.fc-card-back{transform:rotateY(180deg) translate3d(0,0,0);-webkit-transform:rotateY(180deg) translate3d(0,0,0);background:rgba(250,250,253,0.9);border-top:5px solid #10b981}.fc-prompt-area{flex-grow:1;display:flex;flex-direction:column;justify-content:center;align-items:center;text-align:center;padding:20px 0;width:100%;min-width:0}.fc-prompt-text{font-size:1.45rem;font-weight:600;color:var(--text-primary);line-height:1.6;margin:0 0 16px 0;width:100%;word-wrap:break-word;overflow-wrap:break-word}.fc-input-field{width:100%;max-width:400px;padding:12px 16px;border:2px solid rgba(15,23,42,0.1);border-radius:8px;font-family:inherit;font-size:1.05rem;outline:none;transition:all var(--transition-fast);text-align:center}.fc-input-field:focus{border-color:var(--primary-color);box-shadow:0 0 0 3px rgba(79,70,229,0.15)}.fc-badge{font-size:0.75rem;font-weight:700;background:rgba(79,70,229,0.08);color:var(--primary-color);padding:4px 10px;border-radius:4px;align-self:flex-start}.fc-status-badge{font-size:0.85rem;font-weight:700;padding:6px 14px;border-radius:6px;margin-bottom:16px;display:inline-block}.fc-status-correct{background:rgba(16,185,129,0.1);color:#059669;border:1px solid rgba(16,185,129,0.2)}.fc-status-incorrect{background:rgba(239,68,68,0.1);color:#dc2626;border:1px solid rgba(239,68,68,0.2)}.fc-progress-container{background:rgba(15,23,42,0.04);height:6px;border-radius:3px;width:100%;overflow:hidden}.fc-progress-bar{background:var(--primary-gradient);height:100%;transition:width var(--transition-normal)}.fc-symbols-toggle-btn{background:rgba(79,70,229,0.04);border:1px solid rgba(79,70,229,0.12);font-family:inherit;font-size:0.78rem;font-weight:700;color:var(--primary-color);cursor:pointer;display:flex;align-items:center;gap:6px;padding:6px 16px;border-radius:20px;transition:all 0.25s cubic-bezier(0.4,0,0.2,1);outline:none}.fc-symbols-toggle-btn:hover{background:rgba(79,70,229,0.08) !important;border-color:rgba(79,70,229,0.3) !important;transform:scale(1.02);box-shadow:0 4px 10px rgba(79,70,229,0.08)}.fc-symbols-toggle-btn:active{transform:scale(0.98)}.math-content,.katex-display,.katex{max-width:100% !important;overflow-x:auto !important;overflow-y:hidden !important;display:inline-block !important;vertical-align:middle !important}.math-content::-webkit-scrollbar,.katex-display::-webkit-scrollbar,.katex::-webkit-scrollbar{height:3px}.math-content::-webkit-scrollbar-thumb,.katex-display::-webkit-scrollbar-thumb,.katex::-webkit-scrollbar-thumb{background:rgba(79,70,229,0.15);border-radius:2px}@media (max-width:768px){.page-flashcards .tool-module{margin-bottom:24px !important}.fc-hub-console{padding:14px 16px !important;border-radius:18px !important;margin-bottom:14px !important;gap:10px !important;background:rgba(15,23,42,0.75) !important;backdrop-filter:blur(16px) !important;-webkit-backdrop-filter:blur(16px) !important;border:1px solid rgba(255,255,255,0.12) !important;border-top:2px solid rgba(192,132,252,0.4) !important;box-shadow:0 10px 25px -5px rgba(0,0,0,0.3) !important}.fc-hub-header-row{flex-direction:column !important;align-items:flex-start !important;gap:8px !important}.fc-hub-title{font-size:1.05rem !important}.fc-study-header-bar{display:flex !important;flex-direction:column !important;gap:8px !important;width:100% !important}.fc-study-top-nav{display:flex !important;justify-content:space-between !important;align-items:center !important;width:100% !important}.fc-back-pill{display:inline-flex !important;align-items:center !important;gap:5px !important;font-size:0.75rem !important;font-weight:700 !important;color:#E9D5FF !important;background:rgba(168,85,247,0.18) !important;border:1px solid rgba(168,85,247,0.35) !important;padding:4px 10px !important;border-radius:999px !important;text-decoration:none !important}.fc-progress-pill{font-size:0.75rem !important;font-weight:750 !important;color:#A7F3D0 !important;background:rgba(16,185,129,0.15) !important;border:1px solid rgba(16,185,129,0.3) !important;padding:4px 10px !important;border-radius:999px !important}.fc-study-deck-title{font-size:1.08rem !important;font-weight:850 !important;color:#FFFFFF !important;margin:0 !important;line-height:1.3 !important;letter-spacing:-0.01em !important}.fc-progress-track{height:6px !important;background:rgba(0,0,0,0.4) !important;border-radius:999px !important}.fc-card-perspective{min-height:380px !important}.fc-card-inner{min-height:380px !important}.fc-card-face{min-height:380px !important;border-radius:20px !important;padding:16px 18px !important;background:rgba(15,23,42,0.88) !important;border:1px solid rgba(255,255,255,0.14) !important;border-top:3px solid #A855F7 !important;box-shadow:0 16px 36px -8px rgba(0,0,0,0.5),0 0 20px rgba(168,85,247,0.15) !important}.fc-card-back{border-top:3px solid #10B981 !important;box-shadow:0 16px 36px -8px rgba(0,0,0,0.5),0 0 20px rgba(16,185,129,0.15) !important}.fc-card-header{padding-bottom:10px !important;margin-bottom:8px !important}.fc-topic-tag{font-size:0.72rem !important;padding:3px 9px !important}.fc-card-counter{font-size:0.78rem !important;color:rgba(255,255,255,0.75) !important}.fc-prompt-text{font-size:1.05rem !important;line-height:1.6 !important}.fc-btn-reveal{width:100% !important;height:48px !important;font-size:0.96rem !important;font-weight:800 !important;border-radius:12px !important;display:flex !important;justify-content:center !important;align-items:center !important;box-shadow:0 6px 20px rgba(124,58,237,0.4) !important}.fc-grade-row{display:grid !important;grid-template-columns:1fr 1fr !important;gap:8px !important;width:100% !important;margin-top:8px !important}.fc-grade-btn{width:100% !important;height:44px !important;font-size:0.86rem !important;font-weight:750 !important;border-radius:10px !important;justify-content:center !important}.fc-grade-row #fc-btn-next{grid-column:span 2 !important;width:100% !important;height:46px !important;margin-top:4px !important}}