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112px)}.exercise-sidebar{background:var(--surface);border-radius:var(--radius);padding:24px;box-shadow:var(--shadow);height:fit-content;position:sticky;top:88px;display:flex;flex-direction:column;gap:24px}.exercise-sidebar h3{margin-bottom:0;font-size:1.1rem;color:var(--ink);border-bottom:1px solid var(--border);padding-bottom:12px}.sidebar-section h4{font-size:.9rem;color:var(--text-light);margin-bottom:12px;text-transform:uppercase;letter-spacing:.5px}.option-group{display:flex;flex-wrap:wrap;gap:12px}.option-group.grid-2{display:grid;grid-template-columns:1fr 1fr;gap:12px}.opt-btn{flex:1;padding:12px 10px;border:1.5px solid transparent;border-radius:14px;background:var(--surface-alt);color:var(--ink-muted);font-weight:700;cursor:pointer;transition:all .2s cubic-bezier(.4,0,.2,1);text-align:center;font-size:.95rem}.opt-btn:hover{background:#fff;color:var(--ink);transform:translateY(-2px);box-shadow:0 4px 12px 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0}.math-text{font-family:Nunito,sans-serif}.print-blank{display:inline-block;min-width:48px;border-bottom:2px solid var(--ink);text-align:center;font-size:1.3rem}.print-box{display:inline-block;width:40px;height:32px;border:2px solid var(--ink);border-radius:4px}.answer-page{border-top:2px dashed var(--border)}.answer-grid{display:grid;grid-template-columns:repeat(6,1fr);gap:8px}.answer-item{font-weight:700;font-size:.95rem;padding:4px 0}@media(max-width:768px){.practice-layout{grid-template-columns:1fr;display:flex;flex-direction:column}.desktop-only{display:none}.mobile-menu-toggle{display:flex;justify-content:space-between;align-items:center;width:100%;padding:12px 16px;background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);font-size:1.1rem;font-weight:700;color:var(--ink);cursor:pointer;margin-bottom:16px}.exercise-sidebar{display:none;position:static;margin-bottom:16px}.mobile-menu-open .exercise-sidebar{display:block}.mobile-menu-open 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#f0e6d2;border-radius:12px;display:flex;align-items:center;justify-content:center;font-size:3.2rem;font-weight:900;font-family:Nunito,sans-serif;box-shadow:0 6px #e6d8c3,0 8px 10px #0000001a,inset 0 0 10px #fffc;cursor:grab;transition:transform .1s,box-shadow .1s;-webkit-user-select:none;user-select:none}.number-token:active,.number-token.dragging-num{cursor:grabbing;transform:translateY(6px);box-shadow:0 0 #e6d8c3,0 2px 4px #0000001a,inset 0 0 10px #fffc}.num-color-0{color:#f44336;text-shadow:1px 2px 0 #c62828,-1px -1px 0 #ffcdd2}.num-color-1{color:#ffb300;text-shadow:1px 2px 0 #ff8f00,-1px -1px 0 #fff8e1}.num-color-2{color:#8bc34a;text-shadow:1px 2px 0 #558b2f,-1px -1px 0 #f1f8e9}.num-color-3{color:#29b6f6;text-shadow:1px 2px 0 #0277bd,-1px -1px 0 #e1f5fe}.num-color-4{color:#ab47bc;text-shadow:1px 2px 0 #6a1b9a,-1px -1px 0 #f3e5f5}.num-color-5{color:#ec407a;text-shadow:1px 2px 0 #ad1457,-1px -1px 0 #fce4ec}.num-color-6{color:#26a69a;text-shadow:1px 2px 0 #00695c,-1px -1px 0 #e0f2f1}.num-color-7{color:#ff7043;text-shadow:1px 2px 0 #d84315,-1px -1px 0 #fbe9e7}.num-color-8{color:#5c6bc0;text-shadow:1px 2px 0 #283593,-1px -1px 0 #e8eaf6}.num-color-9{color:#7e57c2;text-shadow:1px 2px 0 #4527a0,-1px -1px 0 #ede7f6}@media(max-width:768px){.counting-layout{flex-direction:column;align-items:center}.sticks-pool,.number-tokens-pool{flex-direction:row;flex-wrap:wrap;width:100%;justify-content:center}}.number-dropzone{border:2px dashed var(--ink);border-radius:12px;width:60px;height:60px;margin-bottom:10px;display:flex;align-items:center;justify-content:center;opacity:0;transition:opacity .5s;background:#fff}.counting-box.sticks-completed .number-dropzone{opacity:1}.counting-box.sticks-completed{border-color:var(--primary-light)}@keyframes bounce{0%,to{transform:translateY(0)}50%{transform:translateY(-10px)}}.journey-layout{position:relative;width:100%;height:calc(100vh - 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cubic-bezier(.175,.885,.32,1.275) forwards}.reward-ribbon{position:absolute;top:-25px;left:50%;transform:translate(-50%);width:280px;height:50px;background:#3b82f6;color:#fff;font-size:1.8rem;font-weight:700;line-height:50px;border-radius:8px;box-shadow:0 4px #2563eb;z-index:10}.reward-ribbon:before,.reward-ribbon:after{content:"";position:absolute;top:15px;z-index:-1;border:20px solid #2563eb}.reward-ribbon:before{left:-20px;border-left-color:transparent;transform:rotate(-10deg)}.reward-ribbon:after{right:-20px;border-right-color:transparent;transform:rotate(10deg)}.reward-stars-container{display:flex;justify-content:center;gap:15px;margin:30px 0}.reward-star-slot{width:70px;height:70px;position:relative;opacity:0;transform:scale(0);animation:starPop .5s cubic-bezier(.175,.885,.32,1.275) forwards}.reward-star-img{width:100%;height:100%;object-fit:contain;filter:drop-shadow(0 4px 4px rgba(0,0,0,.1))}.reward-star-img.dim{filter:grayscale(100%) opacity(.5)}.reward-gift-container{margin-bottom:20px}.gift-box{font-size:6rem;animation:float 3s ease-in-out infinite}.reward-continue-btn{font-size:1.4rem;padding:12px 30px}@keyframes popIn{to{transform:scale(1);opacity:1}}@keyframes fadeIn{to{opacity:1}}@keyframes fadeOut{to{opacity:0}}@keyframes starPop{to{opacity:1;transform:scale(1)}}@keyframes float{0%,to{transform:translateY(0)}50%{transform:translateY(-10px)}}.wood-puzzle-board{display:flex;justify-content:space-between;width:100%;max-width:1100px;margin:0 auto;padding:20px 0;gap:20px}.wood-tray{flex:1;background:#ffffff80;border:3px dashed #dcb285;border-radius:16px;padding:15px;display:flex;flex-direction:column;align-items:center;min-height:400px}.tray-title{font-weight:900;color:#8b4513;margin-bottom:15px;font-size:1.2rem;text-transform:uppercase;letter-spacing:1px}.tray-slots{display:flex;flex-direction:column;gap:15px;width:100%;align-items:center}.wood-workspace-container{flex:1.5;display:flex;flex-direction:column;align-items:center}.workspace-title{font-weight:900;color:#b45309;margin-bottom:15px;font-size:1.4rem}.wood-workspace{width:400px;height:160px;background:#fffc;border:4px solid #fcd34d;border-radius:16px;box-shadow:inset 0 4px 10px #0000001a;display:flex;align-items:center;justify-content:center;position:relative;margin-bottom:20px;transition:transform .2s,background .2s}.wood-workspace.error{animation:shake .4s cubic-bezier(.36,.07,.19,.97) both;background:#fee2e2;border-color:#ef4444}.wood-completed{display:flex;flex-direction:column;gap:10px;width:100%;align-items:center}.wood-piece{position:relative;cursor:pointer;transition:transform .2s,opacity .2s;-webkit-user-select:none;user-select:none}.wood-piece:hover{transform:scale(1.05)}.wood-piece.selected{transform:scale(1.1);opacity:.8;pointer-events:none}.wood-piece.matched{cursor:default;transform:scale(.9)}.wood-piece.matched:hover{transform:scale(.9)}.image-piece{width:264px;height:120px}.number-piece{width:120px;height:120px}.wood-svg{position:absolute;top:0;left:0;width:100%;height:100%;filter:drop-shadow(0 4px 4px rgba(0,0,0,.25))}.wood-path{fill:#e5c088;stroke:#8b4513;stroke-width:2;stroke-linejoin:round}.piece-content{position:absolute;top:0;left:0;height:100%;display:flex;align-items:center;justify-content:center;z-index:2}.image-piece .piece-content{width:240px}.number-piece .piece-content{width:120px;padding-left:20px}.piece-content.icons{flex-wrap:wrap;align-content:center;gap:4px;padding:10px}.wood-icon{font-size:1.5rem}.piece-content.number{font-size:3.5rem;font-weight:900;color:#8b4513;text-shadow:1px 1px 0px rgba(255,255,255,.5)}.wood-workspace .image-piece{position:absolute;left:20px;top:15px}.wood-workspace .number-piece{position:absolute;left:260px;top:15px}.completed-pair{display:flex;position:relative;width:360px;height:120px;transform:scale(.6);transform-origin:center top;margin-bottom:-45px}.completed-pair .image-piece{position:absolute;left:0;top:0}.completed-pair .number-piece{position:absolute;left:240px;top:0}.word-math-exercise{display:flex;flex-direction:column;align-items:center;gap:30px;padding:40px}.word-math-question{display:flex;align-items:flex-start;gap:15px;background:#fdf6e3;padding:20px 30px;border-radius:16px;border:2px dashed #d4a373;max-width:800px}.speaker-btn{background:transparent;border:none;width:70px;height:70px;cursor:pointer;transition:transform .1s;padding:0;flex-shrink:0}.speaker-btn img{width:100%;height:100%;object-fit:contain;filter:drop-shadow(0 4px 0px rgba(0,0,0,.1))}.speaker-btn:active{transform:translateY(4px)}.question-text{font-size:1.6rem;line-height:1.5;color:#1e293b;margin:0;font-family:Nunito,sans-serif}.word-math-visuals{display:flex;gap:20px;align-items:center;flex-wrap:wrap;justify-content:center}.visual-group{display:flex;flex-wrap:wrap;gap:10px;align-items:center;justify-content:center;max-width:400px}.visual-group.bordered{border:2px solid #fbbf24;border-radius:16px;padding:15px;background:#ffffff80}.word-math-visuals .wood-icon{font-size:2.5rem;position:relative}.wood-icon.crossed:after{content:"";position:absolute;top:50%;left:-5px;right:-5px;height:4px;background-color:#ef4444;transform:rotate(-45deg)}.visual-op{font-size:3rem;font-weight:700;color:#64748b}.word-math-answer{display:flex;align-items:center;gap:15px;font-size:1.5rem;font-weight:700;color:#0f172a}.sequence-exercise{padding:40px 20px;overflow-x:auto}.train-container{display:flex;align-items:flex-end;justify-content:center;gap:0px;padding-bottom:25px;min-width:max-content}.train-locomotive{position:relative;font-size:5rem;line-height:1;margin-right:5px;filter:drop-shadow(0 4px 6px rgba(0,0,0,.1))}.smoke{position:absolute;top:-15px;left:20px;width:15px;height:15px;background:#cbd5e1;border-radius:50%;animation:floatUp 2s infinite ease-in}.smoke:after{content:"";position:absolute;top:-20px;left:15px;width:25px;height:25px;background:#94a3b8;border-radius:50%}@keyframes floatUp{0%{transform:translateY(0) scale(1);opacity:.8}to{transform:translateY(-30px) scale(1.5) translate(-10px);opacity:0}}.train-link{width:15px;height:8px;background-color:#475569;margin-bottom:20px;border-radius:4px}.train-car{position:relative;width:80px;height:70px;border-radius:12px 12px 4px 4px;display:flex;flex-direction:column;align-items:center;justify-content:flex-start;box-shadow:inset 0 -5px #0000001a,0 4px 6px #0000001a;padding-top:10px;margin-bottom:10px;transition:transform .2s}.train-car:hover{transform:translateY(-5px)}.bg-red{background-color:#ef4444;border:2px solid #b91c1c}.bg-blue{background-color:#3b82f6;border:2px solid #1d4ed8}.bg-green{background-color:#22c55e;border:2px solid #15803d}.bg-yellow{background-color:#facc15;border:2px solid #a16207}.bg-purple{background-color:#a855f7;border:2px solid #7e22ce}.bg-orange{background-color:#f97316;border:2px solid #c2410c}.car-number{font-size:2.5rem;font-weight:900;color:#fff;text-shadow:1px 1px 0 rgba(0,0,0,.3)}.train-car .diagram-input{width:50px;height:50px;font-size:2rem;text-align:center;border:3px solid #0f172a;border-radius:12px;background:#fff;color:#0f172a;font-weight:900;padding:0;box-shadow:inset 0 2px 4px #0000001a}.train-car .diagram-input:focus{border-color:var(--primary);outline:none}.train-car .diagram-square-box{width:50px;height:50px;border:3px dashed rgba(255,255,255,.7);border-radius:12px}.car-wheels{position:absolute;bottom:-15px;width:100%;display:flex;justify-content:space-around;padding:0 5px}.wheel{width:25px;height:25px;background:#334155;border:3px solid #94a3b8;border-radius:50%;box-shadow:0 2px 4px #0003}.train-locomotive .loco-wheels{position:absolute;bottom:-5px;display:flex;justify-content:space-around;width:80%;left:10%}.sequence-exercise.frog-theme{background-image:url(/assets/images/bg_pond.png);background-size:100% 100%;background-position:center;background-repeat:no-repeat;border:4px solid #8be8cb;box-shadow:inset 0 0 20px #0000001a;padding:0 0 0%;width:100%;aspect-ratio:1672 / 941;display:flex;align-items:flex-end;justify-content:center;border-radius:24px;position:relative;overflow:hidden}.sequence-exercise.train-theme{background-size:100% 100%;background-position:center;background-repeat:no-repeat;border:4px solid #90caf9;box-shadow:inset 0 0 20px #0000001a;padding:0;width:100%;aspect-ratio:1672 / 941;position:relative;overflow:hidden;border-radius:24px}.train-overlay-number{position:absolute;display:flex;justify-content:center;align-items:center;width:130px;height:100px}.train-number-text{width:65px;height:55px;font-size:2.2rem;font-weight:900;color:#333;background:#fffffff2;border:3px solid #333;border-radius:12px;display:flex;align-items:center;justify-content:center;box-shadow:0 4px 8px #0003;cursor:pointer}.train-input{width:65px;height:55px;font-size:2rem;text-align:center;border:3px solid #333;border-radius:12px;background:#fffffff2;color:#333;font-weight:900;box-shadow:0 2px 4px #0003!important}.train-input:focus{outline:none;border-color:#2196f3;box-shadow:0 4px 8px #0000004d,0 0 15px #2196f3}.pond-container{display:flex;align-items:center;justify-content:center;gap:2%;width:95%;position:relative;flex-wrap:nowrap}.lotus-leaf-wrapper{position:relative;display:flex;flex-direction:column;align-items:center;flex:1 1 0;max-width:200px}.lotus-leaf{width:100%;aspect-ratio:200 / 125;height:auto;background-size:contain;background-position:center;background-repeat:no-repeat;display:flex;align-items:center;justify-content:center;filter:drop-shadow(0 6px 4px rgba(0,0,0,.3));transition:transform .2s}.lotus-leaf:hover{transform:scale(1.05) translateY(-2px)}.leaf-content-overlay{position:absolute;top:40%;left:50%;transform:translate(-50%,-50%);z-index:15;display:flex;justify-content:center;align-items:center;width:100%;height:100%}.leaf-number{font-size:2.4rem;font-weight:900;color:#fff;text-shadow:2px 2px 0 #1b4d3e,-1px -1px 0 #1b4d3e,1px -1px 0 #1b4d3e,-1px 1px 0 #1b4d3e,0 4px 6px rgba(0,0,0,.5)}.frog-input{width:60px;height:50px;font-size:2rem;text-align:center;border:3px solid #ffde59;border-radius:12px;background:#fffffff2;color:#1b4d3e;font-weight:900;box-shadow:0 4px 8px #0000004d,0 0 15px #ffde59}.frog-input:focus{outline:none;border-color:#ff914d;box-shadow:0 4px 8px #0000004d,0 0 20px #ff914d}.frog-mascot{position:absolute;top:0;left:0;transform:translate(-50%);width:120px;height:auto;z-index:10;pointer-events:none;filter:drop-shadow(0 10px 5px rgba(0,0,0,.4))}.water-splash{position:absolute;width:80px;height:auto;z-index:11;transform:translate(-50%);pointer-events:none;opacity:1;transition:opacity .3s ease-out}.jc-page{display:grid;grid-template-columns:280px 1fr;min-height:calc(100vh - 80px);gap:0}.jc-sidebar{background:var(--surface);border-right:1px solid var(--border);display:flex;flex-direction:column;overflow:hidden}.jc-sidebar-header{padding:20px;border-bottom:1px solid var(--border)}.jc-sidebar-header h3{font-size:1rem;font-weight:800;color:var(--primary)}.jc-class-list{flex:1;overflow-y:auto;padding:8px}.jc-class-item{display:flex;flex-direction:column;gap:4px;padding:14px 16px;border-radius:var(--radius-sm);cursor:pointer;transition:all .15s;margin-bottom:4px}.jc-class-item:hover{background:var(--surface-alt)}.jc-class-item.active{background:linear-gradient(135deg,#eff6ff,#e0e7ff);border-left:3px solid var(--primary)}.jc-class-item.pending{opacity:.75}.jc-class-item-name{font-weight:700;font-size:.95rem;color:var(--ink)}.jc-class-item-status{font-size:.8rem}.jc-badge{display:inline-flex;align-items:center;gap:4px;padding:2px 8px;border-radius:20px;font-size:.75rem;font-weight:700}.jc-badge.pending{background:#fef3c7;color:#92400e}.jc-badge.approved{background:#d1fae5;color:#065f46}.jc-badge.rejected{background:#fee2e2;color:#991b1b}.jc-sidebar-footer{padding:12px;border-top:1px solid var(--border)}.jc-btn-add{width:100%;padding:12px;background:var(--primary);color:#fff;border:none;border-radius:var(--radius-sm);font-family:var(--font);font-weight:700;font-size:.95rem;cursor:pointer;transition:all .15s}.jc-btn-add:hover{background:var(--primary-hover);transform:translateY(-1px)}.jc-main{display:flex;align-items:center;justify-content:center;padding:30px;background:var(--bg)}.jc-welcome{text-align:center;max-width:400px}.jc-welcome-mascot{width:180px;height:auto;margin-bottom:20px;filter:drop-shadow(0 8px 16px rgba(0,0,0,.1));animation:bobMascot 3s ease-in-out infinite}@keyframes bobMascot{0%,to{transform:translateY(0)}50%{transform:translateY(-10px)}}.jc-welcome h2{font-size:1.4rem;margin-bottom:8px;color:var(--primary)}.jc-welcome p{color:var(--ink-muted);font-size:.95rem;margin-bottom:25px;line-height:1.6}.jc-detail{max-width:500px;width:100%}.jc-detail-header{display:flex;align-items:center;gap:16px;margin-bottom:25px}.jc-detail-icon{font-size:2.5rem;width:64px;height:64px;background:linear-gradient(135deg,#eff6ff,#e0e7ff);border-radius:var(--radius);display:flex;align-items:center;justify-content:center}.jc-detail-header h2{font-size:1.5rem;color:var(--primary)}.jc-detail-teacher{color:var(--ink-muted);font-size:.9rem;margin-top:2px}.jc-detail-stats{display:grid;grid-template-columns:1fr 1fr;gap:12px;margin-bottom:20px}.jc-stat-card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius-sm);padding:16px;text-align:center}.jc-stat-value{font-size:1.4rem;font-weight:800;color:var(--primary)}.jc-stat-label{font-size:.8rem;color:var(--ink-muted);text-transform:uppercase;letter-spacing:.5px;margin-top:2px}.jc-status-banner{display:flex;align-items:flex-start;gap:12px;padding:16px;border-radius:var(--radius-sm);margin-bottom:10px}.jc-status-banner strong{display:block;margin-bottom:4px}.jc-status-banner p{font-size:.85rem;margin:0;opacity:.8}.jc-status-banner.pending{background:#fef3c7;color:#92400e}.jc-status-banner.approved{background:#d1fae5;color:#065f46}.jc-status-banner.rejected{background:#fee2e2;color:#991b1b}.jc-form-container{max-width:420px;width:100%;background:var(--surface);padding:30px;border-radius:var(--radius);box-shadow:var(--shadow)}.jc-form-container h3{font-size:1.2rem;color:var(--primary);margin-bottom:8px}.jc-form-desc{color:var(--ink-muted);font-size:.9rem;margin-bottom:20px}.jc-label{display:block;font-weight:700;font-size:.9rem;margin-bottom:6px;color:var(--ink)}.jc-input{width:100%;padding:12px 14px;border:2px solid var(--border);border-radius:var(--radius-sm);font-size:1rem;font-family:var(--font);color:var(--ink);outline:none;transition:border-color .15s;margin-bottom:16px}.jc-input:focus{border-color:var(--primary)}.jc-avatar-area{display:flex;flex-direction:column;align-items:center;gap:10px;margin-bottom:10px}.jc-avatar-circle{width:150px;height:150px;border-radius:50%;overflow:hidden;border:3px solid var(--primary);background:#f0f0f0;display:flex;align-items:center;justify-content:center}.jc-avatar-actions{display:flex;gap:8px}.jc-btn-primary{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:12px 24px;background:var(--primary);color:#fff;border:none;border-radius:var(--radius-sm);font-family:var(--font);font-weight:700;font-size:1rem;cursor:pointer;transition:all .15s}.jc-btn-primary:hover{background:var(--primary-hover);transform:translateY(-1px)}.jc-btn-primary:disabled{opacity:.6;cursor:not-allowed;transform:none}.jc-btn-danger{display:inline-flex;align-items:center;justify-content:center;padding:8px 16px;background:transparent;color:var(--error);border:1px solid var(--error);border-radius:var(--radius-sm);font-family:var(--font);font-weight:600;font-size:.85rem;cursor:pointer;transition:all .15s}.jc-btn-danger:hover{background:var(--error-bg)}.jc-btn-small{padding:6px 14px;background:var(--surface-alt);color:var(--ink);border:1px solid var(--border);border-radius:8px;font-family:var(--font);font-weight:600;font-size:.85rem;cursor:pointer}.jc-btn-text{padding:8px;background:transparent;color:var(--ink-muted);border:none;font-family:var(--font);font-weight:600;font-size:.9rem;cursor:pointer}.jc-btn-text:hover{color:var(--ink)}.jc-confirm-card{background:var(--surface-alt);padding:20px;border-radius:var(--radius-sm);border:1px solid var(--border);text-align:left;margin:15px 0}.jc-confirm-card p{margin-bottom:6px;font-size:.95rem}@media(max-width:768px){.jc-page{grid-template-columns:1fr}.jc-sidebar{border-right:none;border-bottom:1px solid var(--border);max-height:200px}.jc-class-list{display:flex;overflow-x:auto;padding:8px;gap:8px}.jc-class-item{min-width:160px;margin-bottom:0}}.pi-home{display:flex;flex-direction:column;gap:60px;padding:40px 0;max-width:1200px;margin:0 auto}.pi-hero{display:grid;grid-template-columns:1.1fr .9fr;gap:20px;align-items:center;padding:40px 0;max-width:1200px;margin:0 auto}.pi-hero-content{position:relative;z-index:5;max-width:80%}.pi-hero-content h1{font-size:2.8rem;color:var(--primary);margin-bottom:16px;line-height:1.2}.pi-text-highlight{color:#00a896}.pi-hero-content p{font-size:1.1rem;color:var(--ink-muted);margin-bottom:32px;line-height:1.6}.pi-hero-badge{display:inline-block;background:#f58d7326;color:var(--error);padding:6px 16px;border-radius:20px;font-weight:700;font-size:.85rem;margin-bottom:16px;text-transform:uppercase;letter-spacing:.5px}.pi-hero-actions{display:flex;gap:16px}.pi-btn-start{background:var(--primary);color:#fff;padding:14px 28px;border-radius:30px;font-weight:700;font-size:1.1rem;text-decoration:none;box-shadow:0 8px 24px #173b5733;transition:all .2s}.pi-btn-start:hover{transform:translateY(-2px);box-shadow:0 12px 32px #173b574d}.pi-btn-secondary{background:#fff;color:var(--primary);border:2px solid var(--primary);padding:12px 28px;border-radius:30px;font-weight:700;font-size:1.1rem;text-decoration:none;transition:all .2s}.pi-btn-secondary:hover{background:var(--primary);color:#fff}.pi-hero-visual{display:flex;justify-content:center;align-items:center;position:relative;height:550px;z-index:1}.pi-hero-img-wrap{width:100%;height:100%;position:relative}.pi-hero-map{width:100%;height:100%;object-fit:contain;display:block;transform:scale(1.3);transform-origin:center center}.pi-hero-mascot-overlay{position:absolute;bottom:-20px;left:-280px;width:380px;z-index:10;filter:drop-shadow(0 10px 25px rgba(0,0,0,.2))}.map-hotspot{position:absolute;aspect-ratio:1 / 1;border-radius:50%;z-index:20;cursor:pointer;transition:background .2s}.map-hotspot:hover{background:#ffffff26}.hotspot-so-hoc{left:6.5%;top:-5.5%;width:39%}.hotspot-quy-luat{left:63%;top:7%;width:36%}.hotspot-logic{left:29.5%;top:26.5%;width:39%}.hotspot-hinh-hoc{left:5%;top:57%;width:36%}.hotspot-thu-thach{left:60.5%;top:56.5%;width:39%}.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border-width:0}.pi-values{display:grid;grid-template-columns:repeat(4,1fr);gap:24px}.pi-value-card{background:#fff;padding:32px 24px;border-radius:20px;border:1px solid #f6dec6;box-shadow:none;text-align:center;transition:transform .2s}.pi-value-card:hover{transform:translateY(-4px)}.pi-value-icon{display:flex;justify-content:center;align-items:center;width:136px;height:136px;margin:0 auto 1.5rem}.pi-value-icon img{width:100%;height:100%;object-fit:contain;transform:scale(1.35)}.pi-value-card h3{color:var(--primary);margin-bottom:8px;font-size:1.4rem}.pi-value-card p{color:var(--ink-muted);font-size:1.05rem;line-height:1.5}.pi-skills-header{text-align:center;margin-bottom:32px}.pi-skills-header h2{font-size:2rem;color:var(--primary)}.pi-skills-grid{display:grid;grid-template-columns:repeat(5,1fr);gap:16px}.pi-skill-card{background:var(--surface);padding:24px 16px;border-radius:var(--radius);box-shadow:var(--shadow);text-align:center;cursor:pointer;transition:transform .2s,box-shadow .2s;border-top:4px solid var(--border)}.pi-skill-card:hover{transform:translateY(-5px);box-shadow:var(--shadow-lg)}.pi-skill-card[data-type=count]{border-top-color:var(--mustard)}.pi-skill-card[data-type=bond]{border-top-color:var(--accent)}.pi-skill-card[data-type=add]{border-top-color:var(--primary)}.pi-skill-card[data-type=sub]{border-top-color:var(--error)}.pi-skill-card[data-type=mul]{border-top-color:var(--success)}.pi-skill-icon{font-size:2.5rem;margin-bottom:12px}.pi-skill-card h4{color:var(--ink);margin-bottom:4px}.pi-skill-card p{color:var(--ink-light);font-size:.85rem}.pi-mini-quiz{background:#fdfbf7;border-radius:20px;padding:20px 30px;box-shadow:0 4px 20px #0000000d;display:flex;align-items:center;justify-content:space-between;border:2px solid #a3c4f3}.pi-quiz-title-wrap{display:flex;align-items:center;gap:12px;margin-bottom:24px}.pi-quiz-clock{font-size:2rem}.pi-quiz-content h3{color:var(--primary-dark);margin:0;font-size:1.6rem;font-weight:800}.pi-quiz-label{color:var(--primary-dark);font-size:1.1rem;font-weight:700;margin-bottom:12px}.pi-quiz-row{display:flex;align-items:center;gap:30px}.pi-quiz-question{font-size:1.8rem;font-weight:700;color:var(--ink);letter-spacing:2px}.pi-quiz-options{display:flex;gap:12px}.pi-quiz-btn{background:#fff;border:2px solid #d1d5db;padding:12px 24px;border-radius:8px;font-size:1.4rem;font-weight:700;cursor:pointer;color:var(--ink);transition:all .2s}.pi-quiz-btn:hover{border-color:var(--primary);color:var(--primary)}.practice-home{padding:40px 32px}.practice-home-header{display:flex;align-items:center;gap:24px;margin-bottom:36px;padding:28px 32px;background:var(--surface);border-radius:var(--radius);box-shadow:var(--shadow)}.practice-home-owl{width:100px;height:100px;object-fit:contain;flex-shrink:0;filter:drop-shadow(0 4px 12px rgba(0,0,0,.15))}.practice-home-header h2{font-size:1.6rem;color:var(--primary);margin-bottom:6px}.practice-home-header p{color:var(--ink-muted);font-size:1rem}.practice-home-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(160px,1fr));gap:16px}.practice-home-card{background:var(--surface);border:2px solid var(--border);border-radius:var(--radius);padding:28px 16px;text-align:center;cursor:pointer;transition:all .2s cubic-bezier(.4,0,.2,1);box-shadow:var(--shadow)}.practice-home-card:hover{transform:translateY(-4px);border-color:var(--accent);box-shadow:var(--shadow-lg)}.practice-home-icon{display:block;font-size:2.4rem;margin-bottom:12px}.practice-home-card h3{font-size:.95rem;color:var(--primary);margin:0;font-weight:700}.pi-hint-section{display:flex;align-items:center;position:relative;gap:16px;margin-left:20px}.pi-hint-mascot{width:200px;filter:drop-shadow(0 5px 15px rgba(0,0,0,.1));z-index:2}.pi-hint-bubble-wrapper{position:relative;width:340px;display:flex;align-items:center;justify-content:center}.pi-hint-bubble-bg{width:100%;height:auto;display:block}.pi-hint-text{position:absolute;top:50%;left:55%;transform:translate(-50%,-50%);width:75%;z-index:2}.pi-hint-text h4{color:var(--primary-dark);font-size:1.1rem;margin-bottom:8px;font-weight:800}.pi-hint-text p{color:var(--ink);font-size:.95rem;line-height:1.4;margin:0}