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480px){.landing-title{font-size:1.8rem}.card-icon{font-size:2.5rem}.selection-card{padding:20px 15px}}.teaching-app{min-height:100vh;background:linear-gradient(135deg,#667eea 0%,#764ba2 100%);font-family:Segoe UI,Tahoma,Geneva,Verdana,sans-serif;color:#333}.teaching-header{display:flex;justify-content:space-between;align-items:center;padding:8px 18px;background:rgba(0,0,0,.18);border-bottom:1px solid rgba(255,255,255,.15);-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);gap:12px}.teaching-header .back-button{background:rgba(255,255,255,.2);color:#fff;border:none;border-radius:6px;padding:6px 12px;font-size:.88rem;font-weight:600;cursor:pointer;transition:all .2s ease;white-space:nowrap}.teaching-header .back-button:hover{background:rgba(255,255,255,.35)}.teaching-title{font-size:1.35rem;color:#fff;margin:0;text-align:center;flex:1;font-weight:700;text-shadow:0 1px 3px 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12px;border-radius:10px}.task-final{color:#16a34a;font-weight:700}.teach-footer-actions{display:flex;gap:10px;margin-top:14px;justify-content:center;flex-wrap:wrap}.practice-section{display:flex;flex-direction:column;align-items:center;text-align:center}.question{margin-bottom:12px}.rule-subtext{font-size:.85rem;color:#6366f1;font-weight:700;background:#e0e7ff;padding:3px 10px;border-radius:12px}.expression-title{font-size:2.2rem;color:#1e293b;margin:6px 0;font-weight:800}.flash-card-display{padding:24px 16px;background:#1e293b;color:#38bdf8;border-radius:14px;margin-bottom:16px;width:100%;max-width:340px}.flash-number{font-size:3rem;font-weight:800;animation:flashIn .3s ease}@keyframes 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#10b9814d}.btn-check:hover:not(:disabled){transform:translateY(-2px);box-shadow:0 5px 14px #10b98166}.feedback{margin-top:12px;font-size:1.1rem;font-weight:700;padding:8px 18px;border-radius:10px;animation:popIn .3s ease}@keyframes popIn{0%{transform:scale(.9);opacity:0}to{transform:scale(1);opacity:1}}.feedback.correct{color:#065f46;background:#d1fae5;border:1px solid #a7f3d0}.feedback.incorrect{color:#991b1b;background:#fee2e2;border:1px solid #fecaca}.exam-info{margin-top:12px;font-size:.9rem;font-weight:600;color:#b45309;background:#fef3c7;padding:8px 16px;border-radius:8px;border:1px solid #fde68a}.btn-primary{background:linear-gradient(135deg,#6366f1 0%,#4f46e5 100%);color:#fff;border:none;border-radius:10px;padding:10px 22px;font-size:.95rem;font-weight:700;cursor:pointer;transition:all .2s ease;box-shadow:0 3px 12px #6366f14d}.btn-primary:hover{transform:translateY(-2px);box-shadow:0 6px 18px #6366f166}.btn-secondary{background:#f1f5f9;color:#334155;border:1px solid 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#00000014}.leaderboard-header h2{margin:0;flex:1;font-size:1.3rem;color:#1e293b}.leaderboard-content{background:white;border-radius:12px;padding:24px 16px;box-shadow:0 4px 15px #00000014;text-align:center}.trophy-icon{font-size:3rem;margin-bottom:10px}@media (max-width: 768px){.teaching-header{padding:6px 10px;gap:6px}.teaching-title{font-size:1.1rem}.coin-display{padding:3px 8px;font-size:.8rem}.premium-badge{display:none}.lesson-view{padding:6px 8px}.lesson-header{padding:6px 10px;margin-bottom:8px}.lesson-title-text{font-size:.95rem}.lesson-content{padding:10px 8px}.abacus-demo{padding:8px 6px}.task-formula{font-size:1.4rem}.abacus-frame{padding:6px 6px 8px;border-radius:14px}.abacus-rods{min-height:250px;gap:4px;padding:0 4px}.abacus-rod-column{width:48px;min-width:48px;min-height:250px}.abacus-rod-column:before{width:6px;bottom:18px}.abacus-upper-area{height:98px}.abacus-separator{width:calc(100% + 16px);margin:0 -8px;height:7px}.abacus-lower-area{height:145px}.abacus-bead{width:44px;height:22px}.stages-container{grid-template-columns:1fr;gap:16px}.stage-card{padding:20px 22px}.step-navigation-box{padding:10px 12px;margin:8px 0 4px}.step-description-text{font-size:1.08rem}.step-bead-guide-box{font-size:.95rem}.expression-title{font-size:1.8rem}.answer-input-group{flex-direction:column;width:100%}.answer-input,.btn-check,.btn-use-abacus{width:100%;max-width:220px}}:root{--primary-color: #6366f1;--primary-hover: #4f46e5;--secondary-color: #ec4899;--accent-gold: #f59e0b;--accent-green: #10b981;--accent-blue: #0ea5e9;--accent-purple: #8b5cf6;--accent-red: #ef4444;--bg-gradient: linear-gradient(135deg, #0f172a 0%, #1e1b4b 50%, #311042 100%);--card-bg: rgba(30, 41, 59, .85);--card-border: rgba(255, 255, 255, .12);--text-main: #f8fafc;--text-muted: #94a3b8;--radius-lg: 24px;--radius-md: 16px;--radius-sm: 10px;--shadow-glow: 0 10px 30px rgba(99, 102, 241, .3);--shadow-gold: 0 10px 30px rgba(245, 158, 11, .35)}.liga-wrapper{min-height:100vh;background:var(--bg-gradient);color:var(--text-main);font-family:Segoe UI,system-ui,-apple-system,sans-serif;display:flex;flex-direction:column;position:relative;overflow-x:hidden;box-sizing:border-box}.liga-header{position:sticky;top:0;z-index:100;background:rgba(15,23,42,.92);-webkit-backdrop-filter:blur(16px);backdrop-filter:blur(16px);border-bottom:1px solid var(--card-border);padding:10px 16px;display:flex;align-items:center;justify-content:space-between;box-shadow:0 4px 20px #0000004d;gap:10px}@media (min-width: 769px){.liga-header{padding:12px 24px}}.liga-brand{display:flex;align-items:center;gap:8px;cursor:pointer}.liga-logo-icon{font-size:1.8rem;filter:drop-shadow(0 0 10px rgba(245,158,11,.6));animation:floatBounce 3s ease-in-out infinite}.liga-brand-title{font-size:1.4rem;font-weight:900;margin:0;background:linear-gradient(90deg,#fcd34d 0%,#f59e0b 50%,#ec4899 100%);-webkit-background-clip:text;-webkit-text-fill-color:transparent;letter-spacing:.5px}.liga-header-right{display:flex;align-items:center;gap:8px}@media (min-width: 769px){.liga-header-right{gap:12px}}.desktop-header-items{display:none;align-items:center;gap:10px}@media (min-width: 960px){.desktop-header-items{display:flex}}.stat-pill{display:flex;align-items:center;gap:5px;background:rgba(255,255,255,.08);border:1px solid rgba(255,255,255,.15);border-radius:30px;padding:6px 12px;font-size:.85rem;font-weight:700;transition:all .25s ease;white-space:nowrap}.stat-pill:hover{transform:translateY(-2px);background:rgba(255,255,255,.14)}.stat-pill.streak{color:#ff7849;border-color:#ff784966;box-shadow:0 0 12px #ff784933}.stat-pill.coins{color:#fbbf24;border-color:#fbbf2466}.stat-pill.level{color:#a78bfa;border-color:#a78bfa66}.premium-badge-btn{background:linear-gradient(90deg,#f59e0b,#ec4899);color:#fff!important;border:none!important;cursor:pointer;box-shadow:0 2px 10px #ec489959}.pro-active-badge{background:linear-gradient(90deg,#10b981,#059669);color:#fff!important;border:none!important}.waffle-menu-btn{background:rgba(255,255,255,.1);border:1px solid rgba(255,255,255,.15);color:#fff;width:38px;height:38px;border-radius:12px;display:flex;align-items:center;justify-content:center;cursor:pointer;transition:all .2s ease;font-size:1.25rem}.waffle-menu-btn:hover{background:rgba(255,255,255,.2);border-color:#ffffff4d}.waffle-icon{line-height:1}.role-switcher{display:flex;align-items:center;background:rgba(0,0,0,.3);border-radius:30px;padding:3px;border:1px solid var(--card-border)}.role-btn{background:transparent;border:none;color:var(--text-muted);font-size:.82rem;font-weight:600;padding:6px 12px;border-radius:20px;cursor:pointer;transition:all .2s ease;display:flex;align-items:center;gap:5px}.role-btn.active{background:var(--primary-color);color:#fff;box-shadow:0 2px 10px #6366f180}.role-btn.admin.active{background:#dc2626;box-shadow:0 2px 10px 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#6366f159}.active-check{font-weight:900;color:#34d399}.waffle-actions-list{display:flex;flex-direction:column;gap:8px}.waffle-action-item{display:flex;align-items:center;justify-content:space-between;background:rgba(255,255,255,.05);border:1px solid rgba(255,255,255,.08);color:#fff;border-radius:12px;padding:12px 14px;font-size:.86rem;font-weight:700;cursor:pointer;transition:all .2s ease}.waffle-action-item:hover{background:rgba(255,255,255,.12);transform:translate(3px)}.waffle-action-item.exit{color:#f87171;border-color:#f8717133}.liga-main-content{flex:1;max-width:1200px;width:100%;margin:0 auto;padding:24px 20px 90px;box-sizing:border-box}.child-bottom-nav{position:fixed;bottom:0;left:0;right:0;background:rgba(15,23,42,.95);-webkit-backdrop-filter:blur(20px);backdrop-filter:blur(20px);border-top:1px solid var(--card-border);display:flex;justify-content:space-around;padding:10px 16px;z-index:95;box-shadow:0 -4px 25px #0006}.nav-item{display:flex;flex-direction:column;align-items:center;gap:4px;background:transparent;border:none;color:var(--text-muted);font-size:.75rem;font-weight:600;cursor:pointer;transition:all .2s ease;padding:6px 12px;border-radius:12px}.nav-item .nav-icon{font-size:1.4rem;transition:transform .2s ease}.nav-item:hover,.nav-item.active{color:#fcd34d}.nav-item.active .nav-icon{transform:translateY(-4px) scale(1.15)}.child-home-grid{display:grid;grid-template-columns:1fr 340px;gap:24px;margin-bottom:30px}@media (max-width: 960px){.child-home-grid{grid-template-columns:1fr}}.welcome-card{background:linear-gradient(135deg,rgba(99,102,241,.25) 0%,rgba(236,72,153,.25) 100%);border:1px solid var(--card-border);border-radius:var(--radius-lg);padding:28px;position:relative;overflow:hidden;box-shadow:0 10px 30px #0000004d}.welcome-card:after{content:"";position:absolute;top:-50%;right:-20%;width:250px;height:250px;background:radial-gradient(circle,rgba(245,158,11,.25) 0%,transparent 70%);pointer-events:none}.welcome-header{display:flex;align-items:center;justify-content:space-between;margin-bottom:20px}.welcome-text h2{font-size:2rem;font-weight:800;margin:0 0 6px}.welcome-text p{margin:0;color:var(--text-muted);font-size:1rem}.xp-progress-bar-container{background:rgba(0,0,0,.4);border-radius:30px;height:18px;width:100%;overflow:hidden;position:relative;margin:14px 0 8px;border:1px solid rgba(255,255,255,.1)}.xp-progress-fill{background:linear-gradient(90deg,#f59e0b,#ec4899,#8b5cf6);height:100%;border-radius:30px;transition:width .6s cubic-bezier(.34,1.56,.64,1);box-shadow:0 0 15px #ec489999}.xp-label{display:flex;justify-content:space-between;font-size:.85rem;font-weight:600;color:var(--text-muted)}.play-adventure-btn{background:linear-gradient(135deg,#10b981 0%,#059669 100%);color:#fff;border:none;border-radius:var(--radius-md);padding:16px 28px;font-size:1.15rem;font-weight:800;cursor:pointer;display:inline-flex;align-items:center;gap:12px;margin-top:20px;box-shadow:0 10px 25px #10b98166;transition:all .25s cubic-bezier(.34,1.56,.64,1)}.play-adventure-btn:hover{transform:translateY(-4px) scale(1.03);box-shadow:0 15px 35px #10b98199}.pet-card{background:var(--card-bg);border:1px solid var(--card-border);border-radius:var(--radius-lg);padding:24px;display:flex;flex-direction:column;align-items:center;text-align:center;position:relative;-webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px)}.pet-avatar-wrapper{position:relative;width:130px;height:130px;background:radial-gradient(circle,rgba(139,92,246,.3) 0%,transparent 70%);border-radius:50%;display:flex;align-items:center;justify-content:center;margin-bottom:12px}.pet-avatar-icon{font-size:5rem;animation:petIdle 3s ease-in-out infinite;filter:drop-shadow(0 10px 15px 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#f59e0b80}.feed-pet-btn:disabled{opacity:.5;cursor:not-allowed}.home-league-banner{background:linear-gradient(135deg,rgba(245,158,11,.2) 0%,rgba(99,102,241,.2) 100%);border:2px solid rgba(245,158,11,.45);border-radius:var(--radius-lg);padding:24px 26px;margin-bottom:30px;display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:20px;box-shadow:0 10px 30px #0000004d,inset 0 1px 2px #ffffff26;position:relative;overflow:hidden}.home-league-banner:before{content:"";position:absolute;top:-50%;left:-20%;width:250px;height:250px;background:radial-gradient(circle,rgba(245,158,11,.2) 0%,transparent 70%);pointer-events:none}.league-banner-left{display:flex;align-items:center;gap:18px;flex:1;min-width:280px}.league-trophy-badge{width:68px;height:68px;min-width:68px;background:linear-gradient(135deg,rgba(245,158,11,.3) 0%,rgba(217,119,6,.3) 100%);border:2px solid #f59e0b;border-radius:50%;font-size:2.4rem;display:flex;align-items:center;justify-content:center;box-shadow:0 0 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ease}.mission-item.completed{border-color:#10b98166;background:rgba(16,185,129,.1)}.mission-item-info h4{font-size:.95rem;font-weight:700;margin:0 0 4px}.mission-item-info p{font-size:.8rem;color:var(--text-muted);margin:0 0 8px}.mission-progress-bar{width:100%;height:6px;background:rgba(255,255,255,.1);border-radius:10px;overflow:hidden}.mission-progress-fill{height:100%;background:#10b981;border-radius:10px}.claim-mission-btn{background:linear-gradient(135deg,#10b981,#059669);color:#fff;border:none;border-radius:var(--radius-sm);padding:8px 14px;font-size:.85rem;font-weight:700;cursor:pointer;white-space:nowrap;animation:pulseGlow 1.5s infinite}.adventure-section{display:flex;flex-direction:column;gap:28px}.worlds-selector{display:flex;gap:12px;overflow-x:auto;padding-bottom:10px;scrollbar-width:thin}.world-tab-btn{background:rgba(30,41,59,.8);border:1px solid var(--card-border);border-radius:var(--radius-md);padding:12px 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solid rgba(255,255,255,.2);background:#334155;color:#fff;font-size:1.4rem;font-weight:800;display:flex;flex-direction:column;align-items:center;justify-content:center;cursor:pointer;position:relative;transition:all .3s cubic-bezier(.34,1.56,.64,1);box-shadow:0 8px 20px #0000004d}.level-node-btn.completed{background:linear-gradient(135deg,#10b981 0%,#059669 100%);border-color:#6ee7b7}.level-node-btn.current{background:linear-gradient(135deg,#f59e0b 0%,#d97706 100%);border-color:#fde68a;transform:scale(1.18);box-shadow:0 0 30px #f59e0b99;animation:bounceCurrent 1.5s infinite}.level-node-btn.locked{background:#1e293b;color:#64748b;cursor:not-allowed}.level-stars{position:absolute;bottom:-12px;font-size:.75rem;letter-spacing:1px}.boss-node-btn{width:90px;height:90px;border-radius:var(--radius-md);background:linear-gradient(135deg,#dc2626 0%,#991b1b 100%);border:3px solid #fca5a5;color:#fff;font-size:2.2rem;display:flex;flex-direction:column;align-items:center;justify-content:center;cursor:pointer;box-shadow:0 10px 30px #dc262680;animation:pulseGlowRed 2s infinite;transition:all .2s ease}.boss-node-btn.locked{background:#1e293b;border-color:#475569;color:#64748b;cursor:not-allowed;box-shadow:none;animation:none;opacity:.65}.exercise-arena-view-wrapper{position:fixed;top:0;right:0;bottom:0;left:0;z-index:500;background:rgba(15,23,42,.96);backdrop-filter:blur(16px);-webkit-backdrop-filter:blur(16px);overflow-y:auto;-webkit-overflow-scrolling:touch;display:flex;align-items:flex-start;justify-content:center;padding:20px 16px 80px;box-sizing:border-box}.exercise-arena-container{max-width:820px;width:100%;box-sizing:border-box;margin:0 auto;background:var(--card-bg);border:1px solid var(--card-border);border-radius:var(--radius-lg);padding:20px 24px;box-shadow:0 20px 50px #00000080;-webkit-backdrop-filter:blur(20px);backdrop-filter:blur(20px);position:relative}.arena-top-bar{display:flex;align-items:center;justify-content:space-between;margin-bottom:16px;background:rgba(15,23,42,.7);padding:10px 14px;border-radius:14px;border:1px solid rgba(255,255,255,.08);gap:12px}.arena-header-center{text-align:center;flex:1}.arena-world-title{font-size:.88rem;color:var(--text-muted);font-weight:700;margin-bottom:2px}.arena-question-counter{font-size:1.15rem;font-weight:800;color:#fcd34d}.arena-header-spacer{width:70px}.arena-progress-line{height:6px;background:rgba(255,255,255,.1);border-radius:10px;overflow:hidden;margin-bottom:18px}.arena-progress-fill{height:100%;background:linear-gradient(90deg,#6366f1,#10b981);transition:width .3s ease}.combo-pill{background:linear-gradient(90deg,#ff7849,#ec4899);padding:6px 14px;border-radius:20px;font-weight:800;font-size:.9rem;color:#fff;animation:pulseGlow 1s infinite;white-space:nowrap}.arena-controls-row{display:flex;justify-content:space-between;align-items:center;gap:12px;flex-wrap:wrap;width:100%;box-sizing:border-box;margin-bottom:18px}.arena-mode-toggle{display:grid;grid-template-columns:repeat(3,1fr);background:rgba(0,0,0,.45);padding:3px;border-radius:12px;border:1px solid rgba(255,255,255,.12);gap:4px;flex:1;min-width:260px;box-sizing:border-box}.mode-btn{background:transparent;border:none;color:var(--text-muted);font-size:clamp(.72rem,2.2vw,.85rem);font-weight:700;padding:8px 4px;border-radius:8px;cursor:pointer;transition:all .2s ease;white-space:nowrap;text-align:center;display:flex;align-items:center;justify-content:center;width:100%;box-sizing:border-box}.mode-btn:hover{color:#fff}.mode-btn.active{background:#6366f1;color:#fff;box-shadow:0 2px 10px #6366f166}.speed-stepper-container{display:flex;align-items:center;justify-content:center;gap:8px;background:rgba(0,0,0,.45);padding:4px 10px;border-radius:14px;border:1px solid rgba(255,255,255,.12);box-sizing:border-box}.speed-stepper-label{font-size:.82rem;font-weight:700;color:var(--text-muted)}.speed-stepper-control{display:flex;align-items:center;gap:6px;background:rgba(255,255,255,.06);padding:3px 6px;border-radius:10px;border:1px solid rgba(255,255,255,.08)}.speed-step-btn{background:rgba(255,255,255,.12);color:#fff;border:none;width:28px;height:28px;border-radius:8px;font-size:1.1rem;font-weight:900;cursor:pointer;display:flex;align-items:center;justify-content:center;transition:all .15s ease;line-height:1}.speed-step-btn:hover:not(:disabled){background:#f59e0b;color:#1e1b4b;transform:scale(1.08)}.speed-step-btn:disabled{opacity:.35;cursor:not-allowed}.speed-stepper-value{font-size:.95rem;font-weight:900;color:#fcd34d;min-width:38px;text-align:center;letter-spacing:.5px}.mental-flash-card{background:linear-gradient(135deg,rgba(15,23,42,.95) 0%,rgba(30,41,59,.95) 100%);border:2px solid rgba(99,102,241,.35);border-radius:var(--radius-lg);padding:24px 16px;text-align:center;margin-bottom:22px;min-height:120px;display:flex;flex-direction:column;align-items:center;justify-content:center;box-shadow:inset 0 2px 10px #0009,0 10px 30px #0006;position:relative;overflow:hidden}.arena-active-body:has(.arena-soroban-wrapper) .mental-flash-card{padding:12px 14px;min-height:60px;margin-bottom:12px}.arena-active-body:has(.arena-soroban-wrapper) .flash-ready-question-mark{font-size:2.2rem}.arena-active-body:has(.arena-soroban-wrapper) .arena-soroban-wrapper{margin-bottom:14px}.countdown-display{display:flex;align-items:center;justify-content:center}.countdown-number{font-size:3.5rem;font-weight:900;color:#fcd34d;text-shadow:0 0 30px rgba(252,211,77,.7);animation:countdownPop .5s cubic-bezier(.34,1.56,.64,1)}.flash-number-wrapper{display:flex;flex-direction:column;align-items:center;justify-content:center}.flash-step-indicator{font-size:.85rem;font-weight:800;color:#818cf8;letter-spacing:1px;text-transform:uppercase;margin-bottom:4px}.flash-number-main{font-size:4.8rem;font-weight:900;letter-spacing:2px;line-height:1.1;text-shadow:0 4px 25px currentColor;animation:flashPop .25s cubic-bezier(.34,1.56,.64,1)}.flash-number-main.positive{color:#34d399}.flash-number-main.negative{color:#f87171}.input-prompt-wrapper{display:flex;flex-direction:column;align-items:center;gap:8px}.flash-ready-question-mark{font-size:3.8rem;font-weight:900;color:#fcd34d;text-shadow:0 0 30px rgba(252,211,77,.6);animation:pulseGlow 1.5s 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#000c;overflow:hidden;width:100%;max-width:440px}.soroban-top-bar{height:16px;background:linear-gradient(180deg,#3f3f46 0%,#18181b 60%,#09090b 100%);border-bottom:2px solid #09090b;box-shadow:inset 0 1px 2px #fff3}.soroban-bottom-bar{height:16px;background:linear-gradient(180deg,#09090b 0%,#18181b 40%,#3f3f46 100%);border-top:2px solid #09090b;box-shadow:inset 0 -1px 2px #fff3}.soroban-body{display:flex;justify-content:center;background:#09090b;padding:0 8px;position:relative}.soroban-column{position:relative;display:flex;flex-direction:column;align-items:center;flex:1;max-width:96px;min-width:58px;padding:0 4px;transition:all .2s ease}.soroban-column.highlighted{background:rgba(255,255,255,.05);border-radius:8px}.soroban-rod-line{position:absolute;top:0;bottom:0;left:50%;transform:translate(-50%);width:8px;background:var(--rod-line-color, linear-gradient(90deg, #78350f 0%, #b45309 40%, #fde047 55%, #b45309 70%, #451a03 100%));border-radius:4px;box-shadow:1px 0 3px 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p{margin:0;color:#4b5563;line-height:1.6;flex:1}.selection-link{display:inline-flex;align-items:center;justify-content:center;align-self:flex-start;margin-top:18px;padding:10px 16px;border-radius:12px;background:var(--card-accent, #42a5f5);color:#fff;font-weight:700}.selection-footer{margin-top:30px}.primary-action{background:linear-gradient(135deg,#35b34a 0%,#2a8f3a 100%);color:#fff;font-weight:700;padding:14px 32px;border-radius:14px;box-shadow:0 10px 22px #34a85333}.landing-shell{padding:28px 18px 18px;text-align:center}.landing-hero{max-width:760px;margin:0 auto 26px;background:linear-gradient(135deg,rgba(255,255,255,.9),rgba(255,247,214,.8));border:1px solid rgba(255,190,92,.35);border-radius:28px;padding:28px 24px 22px;box-shadow:0 24px 54px #141e481f}.landing-badge{display:inline-flex;align-items:center;justify-content:center;padding:9px 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