@import "https://fonts.googleapis.com/css2?family=Outfit:wght@300;400;600;800&display=swap";:root{--bg-color:#f8fafc;--text-primary:#0f172a;--text-secondary:#475569;--primary-color:#4f46e5;--primary-hover:#4338ca;--surface-color:#ffffffbf;--surface-border:#fff9;--danger-color:#ef4444;--success-color:#10b981}*{box-sizing:border-box;margin:0;padding:0}body{background-color:var(--bg-color);color:var(--text-primary);font-variant-numeric:tabular-nums;background-image:radial-gradient(at 0 0,#b3b3ff80 0,#0000 50%),radial-gradient(at 100% 0,#e6b3ff80 0,#0000 50%),radial-gradient(at 100% 100%,#b3e6ff80 0,#0000 50%),radial-gradient(at 0 100%,#ffb3e680 0,#0000 50%);background-attachment:fixed;flex-direction:column;min-height:100vh;font-family:Outfit,sans-serif;display:flex}.app-container{width:100%;max-width:1200px;margin:0 auto;padding:2rem}.glass{background:var(--surface-color);-webkit-backdrop-filter:blur(12px);border:1px solid var(--surface-border);border-radius:16px;box-shadow:0 8px 32px #1f268712}.main-header{border-radius:16px;justify-content:space-between;align-items:center;margin-bottom:2rem;padding:1rem 2rem;display:flex;box-shadow:0 4px 20px #0000000d}.brand-container{align-items:center;gap:1rem;display:flex}.brand-logo{border-radius:12px;width:auto;height:48px;transition:transform .3s;box-shadow:0 4px 10px #0000001a}.brand-container:hover .brand-logo{transform:rotate(-5deg)scale(1.05)}.brand-title{background:linear-gradient(135deg, var(--primary-color), #8b5cf6);-webkit-text-fill-color:transparent;letter-spacing:-1px;-webkit-background-clip:text;margin:0;font-size:2rem;font-weight:800}.lang-select{border:1px solid var(--surface-border);color:var(--text-primary);cursor:pointer;background:#fffc;border-radius:10px;outline:none;padding:.6rem 1rem;font-family:Outfit,sans-serif;font-weight:600;transition:all .2s;box-shadow:0 2px 10px #00000005}.lang-select:hover{background:#fff;border-color:#cbd5e1;box-shadow:0 4px 12px #0000000d}.header{justify-content:space-between;align-items:center;margin-bottom:2rem;padding:1rem 2rem;display:flex}.header h1{color:var(--primary-color);letter-spacing:-.5px;font-size:1.8rem;font-weight:800}.controls-toggle{background:var(--primary-color);color:#fff;cursor:pointer;border:none;border-radius:8px;padding:.6rem 1.2rem;font-weight:600;transition:all .2s}.controls-toggle:hover{background:var(--primary-hover);transform:translateY(-2px)}.controls-panel{grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:1.5rem;margin-bottom:2rem;padding:1.5rem;display:grid}.control-group{flex-direction:column;gap:.5rem;display:flex}.control-group label{color:var(--text-secondary);font-size:.9rem;font-weight:600}.control-group select,.control-group input[type=number]{background:#fff;border:1px solid #cbd5e1;border-radius:8px;outline:none;padding:.5rem;font-family:Outfit,sans-serif;font-size:1rem}.checkbox-group{flex-direction:column;gap:.4rem;display:flex}.checkbox-label{cursor:pointer;color:var(--text-primary);align-items:center;gap:.5rem;font-size:.9rem;display:flex}.generate-btn{background:var(--text-primary);color:#fff;cursor:pointer;border:none;border-radius:8px;height:100%;padding:.8rem;font-size:1rem;font-weight:600;transition:all .2s}.generate-btn:hover{background:#0f172a;transform:translateY(-2px);box-shadow:0 4px 12px #0000001a}.problems-container{grid-template-columns:repeat(auto-fill,minmax(100px,1fr));gap:.5rem;display:grid}.problem-card{flex-direction:column;justify-content:center;align-items:center;min-height:fit-content;padding:1rem .5rem;font-weight:600;transition:transform .2s;display:flex;position:relative}.problem-card:hover{transform:translateY(-2px)}.problem-row{text-align:right;grid-template-columns:1.5rem 1fr;align-items:center;width:100%;padding:.05rem 0;display:grid}.problem-wrapper{direction:ltr;flex-direction:column;align-items:flex-end;width:fit-content;min-width:60px;margin:0 auto;display:flex}.row-val-text{text-align:right;font-variant-numeric:tabular-nums;font-family:monospace}.problem-row.sign-row{justify-content:flex-end}.problem-sign{color:var(--text-secondary);text-align:center;width:1.2rem;font-size:.85em;font-weight:400;display:inline-block}.problem-divider{border-bottom:2px solid var(--text-primary);width:100%;max-width:60px;height:0;margin:.3rem 0 .3rem auto}.answer-box{text-align:center;color:#0000;cursor:pointer;-webkit-user-select:none;user-select:none;background:#6366f11a;border-radius:8px;width:100%;padding:.5rem;font-weight:800;transition:all .3s;position:relative;overflow:hidden}.answer-box:before{content:"Hover to reveal";color:var(--primary-color);width:100%;font-size:.8rem;font-weight:600;transition:opacity 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#6366f1);color:#fff;cursor:pointer;letter-spacing:.5px;border:none;border-radius:16px;justify-content:center;align-items:center;gap:.8rem;padding:1.2rem 3.5rem;font-size:1.4rem;font-weight:800;transition:all .3s cubic-bezier(.175,.885,.32,1.275);display:inline-flex;position:relative;overflow:hidden;box-shadow:0 10px 25px #4f46e54d}.start-game-btn:hover{filter:brightness(1.1);transform:translateY(-4px)scale(1.02);box-shadow:0 15px 35px #4f46e566}.start-game-btn:active{transform:translateY(-2px)scale(.98)}@keyframes fadeIn{0%{opacity:0;transform:translateY(10px)}to{opacity:1;transform:translateY(0)}}@keyframes bounceIn{0%{opacity:0;transform:scale(.8)}60%{opacity:1;transform:scale(1.05)}to{opacity:1;transform:scale(1)}}.animation-fadein{animation:.4s forwards fadeIn}.animation-bouncein{animation:.5s cubic-bezier(.175,.885,.32,1.275) forwards bounceIn}.game-header-v2{background:var(--surface-color);border-radius:12px;justify-content:space-between;align-items:center;margin-bottom:.8rem;padding:.5rem 1.2rem;display:flex;box-shadow:0 4px 20px #0000000d}.game-header-left{align-items:center;gap:1.5rem;display:flex}.back-link{color:var(--text-secondary);cursor:pointer;background:0 0;border:none;padding:.5rem;font-weight:600;transition:color .2s}.back-link:hover{color:var(--primary-color)}.game-progress,.game-timer,.game-score{align-items:center;gap:.5rem;font-size:1.2rem;font-weight:800;display:flex}.game-timer{background:#ffffffe6;border-radius:12px;padding:.4rem 1rem;box-shadow:0 2px 8px #0000000d}.game-timer.urgent{color:var(--danger-color);animation:1s infinite pulse}.game-layout-v2{grid-template-columns:1fr 180px;align-items:end;gap:.3rem;height:60vh;display:grid}.problem-container-v2{flex-direction:column;max-height:100%;padding:1rem;transition:all .3s;display:flex;overflow:hidden}.problem-scroll-area{flex-direction:column;flex:1;justify-content:center;align-items:center;display:flex;overflow-y:hidden}.sequence-display{flex-direction:column;justify-content:center;align-items:center;width:100%;display:flex}.sequence-row{grid-template-columns:2rem auto;justify-content:center;align-items:center;width:100%;font-weight:800;line-height:1;display:grid}.row-sign{color:var(--primary-color);opacity:.8;text-align:center;width:1.5rem;font-weight:400;display:inline-block}.row-val{text-align:right;min-width:4rem;font-family:monospace;display:inline-block}.op-display{color:var(--text-primary);text-align:center;padding:2rem 0;font-weight:900}.op-sign{color:var(--primary-color)}.problem-divider-v2{background:var(--text-primary);border-radius:2px;width:60%;height:3px;margin:.5rem auto}.game-input-v2{background:#fff;border:3px solid #e2e8f0;border-radius:12px;justify-content:center;align-items:center;min-height:70px;font-size:3.5rem;font-weight:900;display:flex;box-shadow:inset 0 2px 6px #0000000d}.input-text{background:linear-gradient(135deg, var(--primary-color), #ec4899);-webkit-text-fill-color:transparent;-webkit-background-clip:text}.placeholder-text{color:#cbd5e1;-webkit-text-fill-color:#cbd5e1;font-size:2rem}.numpad-v2{background:#fff6;border-radius:12px;padding:.4rem}.numpad-grid{grid-template-columns:repeat(3,1fr);gap:.3rem;display:grid}.numpad-key{height:42px;color:var(--text-primary);cursor:pointer;-webkit-user-select:none;user-select:none;background:#fff;border:none;border-radius:8px;justify-content:center;align-items:center;font-size:1.2rem;font-weight:800;transition:all .1s;display:flex;box-shadow:0 2px #e2e8f0,0 2px 4px #0000000d}.numpad-key:hover{background:#f8fafc;transform:translateY(-1px);box-shadow:0 4px #e2e8f0,0 6px 10px #00000014}.numpad-key:active{transform:translateY(2px);box-shadow:0 1px #e2e8f0,0 1px 3px #0000000d}.clear-key{color:var(--danger-color);background:#fff1f2;font-size:.9rem}.clear-key:hover{background:#ffe4e6}.enter-key{background:linear-gradient(135deg, var(--success-color), #059669);color:#fff;box-shadow:0 2px #047857,0 2px 4px #10b98133}.enter-key:hover{background:linear-gradient(135deg,#10b981,#059669);box-shadow:0 3px #047857,0 4px 6px #10b9814d}.enter-key:active{box-shadow:0 1px #047857,0 1px 2px #10b98133}@media (width<=768px){.game-layout-v2{grid-template-columns:1fr;gap:1.5rem;max-height:none}.game-header-v2{flex-wrap:wrap;justify-content:center;gap:1rem}.game-header-left{justify-content:space-between;width:100%}.numpad-key{border-radius:20px;height:80px;font-size:2.2rem}.game-input-v2{min-height:70px;font-size:3rem}}.interactive-results{text-align:center;max-width:600px;margin:0 auto;padding:4rem}.score-display{color:var(--primary-color);margin:2rem 0;font-size:5rem;font-weight:800}.curriculum-container{max-width:1000px;margin:0 auto;padding:2rem}.levels-grid{grid-template-columns:repeat(auto-fit,minmax(300px,1fr));gap:2rem;display:grid}.level-card{text-align:center;flex-direction:column;align-items:center;padding:2rem;transition:transform .3s,box-shadow .3s;display:flex;position:relative;overflow:hidden}.level-card:hover{transform:translateY(-10px);box-shadow:0 15px 30px #0000001a}.level-card:before{content:"";background:linear-gradient(90deg, var(--primary-color), var(--success-color));width:100%;height:6px;position:absolute;top:0;left:0}.level-icon{margin-bottom:1rem;font-size:4rem}.level-info h3{color:var(--text-primary);margin-bottom:.5rem;font-size:1.5rem}.level-info p{color:var(--text-secondary);margin-bottom:2rem;font-size:1rem;line-height:1.4}.start-level-btn{background:var(--primary-color);color:#fff;cursor:pointer;border:none;border-radius:50px;width:100%;margin-top:auto;padding:.8rem 2rem;font-size:1.2rem;font-weight:800;transition:background .3s,transform .2s}.start-level-btn:hover{background:var(--primary-hover);transform:scale(1.05)}[dir=rtl]{font-family:Tajawal,Cairo,Inter,system-ui,sans-serif}[dir=rtl] .mode-switcher,[dir=rtl] .problem-row.sign-row{flex-direction:row}[dir=rtl] .controls-toggle{margin-left:1rem!important;margin-right:0!important}[dir=rtl] .game-header button{left:auto!important;right:0!important}[dir=rtl] .interactive-results{direction:ltr}[dir=rtl] .interactive-results h1,[dir=rtl] .interactive-results p,[dir=rtl] .interactive-results button{direction:rtl}.flash-anzan-container{text-align:center;-webkit-backdrop-filter:blur(20px);backdrop-filter:blur(20px);background:#ffffffd9;border:1px solid #fff9;border-radius:40px;flex-direction:column;justify-content:center;align-items:center;max-width:900px;height:60vh;margin:2rem auto;display:flex;box-shadow:0 20px 50px #0000001a}.flash-anzan-container h1{text-shadow:0 0 20px #4f46e533;letter-spacing:-2px;margin:0;line-height:1.2}.flash-input-container{text-align:center;background:#fffffff2;border-radius:20px;max-width:600px;margin:2rem auto;padding:3rem 2rem;box-shadow:0 8px 32px #0000001a}.numpad-display{letter-spacing:4px;background:#fff;border:4px solid #e2e8f0;border-radius:24px;justify-content:center;align-items:center;height:120px;font-size:6rem;font-weight:900;display:flex;box-shadow:inset 0 6px 15px #0000000d}.numpad-display span:not(.placeholder){background:linear-gradient(135deg, var(--primary-color), #ec4899);-webkit-text-fill-color:transparent;-webkit-background-clip:text;animation:.2s cubic-bezier(.175,.885,.32,1.275) popIn;display:inline-block}.numpad-display .placeholder{color:#cbd5e1;letter-spacing:0;-webkit-text-fill-color:#cbd5e1;font-size:2.5rem;font-weight:600}@keyframes popIn{0%{opacity:0;transform:scale(.8)}to{opacity:1;transform:scale(1)}}.glow-correct{animation:1s ease-in-out infinite alternate glowCorrect}.glow-wrong{animation:1s ease-in-out infinite alternate glowWrong}@keyframes glowCorrect{0%{box-shadow:0 0 10px #10b98133}to{box-shadow:0 0 30px #10b98199}}@keyframes glowWrong{0%{box-shadow:0 0 10px #ef444433}to{box-shadow:0 0 30px #ef444499}}@media (width<=1024px){.game-layout{grid-template-columns:1fr}.problems-container{grid-template-columns:repeat(auto-fill,minmax(80px,1fr))}}@media (width<=768px){.app-container{padding:1rem}.main-header{text-align:center;flex-direction:column;gap:1rem}.brand-title{font-size:1.5rem}.problems-container{grid-template-columns:repeat(auto-fill,minmax(70px,1fr))}.game-problem-card{padding:1.5rem}.problem-row{font-size:inherit}.game-input-box{min-width:180px;min-height:80px;font-size:4rem}.numpad-container{gap:.8rem;padding:1rem}.numpad-btn{height:70px;font-size:2rem}.flash-anzan-container h1{font-size:8rem!important}.numpad-display{height:80px;font-size:4rem}.levels-grid{grid-template-columns:1fr}.interactive-setup{padding:1.5rem}}@media (width<=480px){.problems-container{grid-template-columns:repeat(auto-fill,minmax(60px,1fr))}.flash-anzan-container h1{font-size:6rem!important}.problem-row{font-size:inherit}.game-input-box{font-size:3rem}.numpad-btn{height:60px;font-size:1.5rem}.numpad-display{height:70px;font-size:3rem}}.main-footer{border-top:1px solid var(--surface-border);background:var(--surface-color);-webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px);border-radius:32px 32px 0 0;margin-top:5rem;padding:3rem 2rem}.footer-content{flex-direction:column;align-items:center;gap:1.5rem;max-width:1200px;margin:0 auto;display:flex}.footer-links{flex-wrap:wrap;justify-content:center;gap:2rem;display:flex}.footer-links button{color:var(--text-secondary);cursor:pointer;background:0 0;border:none;font-family:Outfit,sans-serif;font-size:1rem;font-weight:600;transition:all .2s}.footer-links button:hover{color:var(--primary-color);text-decoration:underline;transform:translateY(-1px)}.footer-info p{color:var(--text-secondary);opacity:.8;font-size:.95rem}.legal-modal-overlay{-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);z-index:2000;background:#0f172a66;justify-content:center;align-items:center;width:100%;height:100%;padding:1rem;animation:.3s fadeIn;display:flex;position:fixed;top:0;left:0}.legal-modal{border-radius:24px;flex-direction:column;width:100%;max-width:700px;max-height:85vh;padding:3rem;animation:.4s cubic-bezier(.175,.885,.32,1.275) bounceIn;display:flex;overflow-y:auto}.modal-header{justify-content:space-between;align-items:center;margin-bottom:2rem;display:flex}.modal-header h2{color:var(--primary-color);margin:0;font-size:2rem;font-weight:800}.close-btn{color:var(--text-secondary);cursor:pointer;background:0 0;border:none;padding:0;font-size:3rem;line-height:.5}.modal-body p{color:var(--text-primary);white-space:pre-wrap;margin:0;font-size:1.15rem;line-height:1.8}[dir=rtl] .modal-header{flex-direction:row}@media (width<=768px){.footer-links{gap:1rem}.legal-modal{padding:2rem}}.soroban-mode-container{max-width:1100px;margin:0 auto;padding:1rem}.soroban-header{justify-content:space-between;align-items:center;margin-bottom:2rem;padding:1.5rem 2rem;display:flex}.soroban-controls{align-items:center;gap:2rem;display:flex}.total-display{color:var(--text-secondary);font-size:1.5rem}.total-display strong{color:var(--primary-color);margin-left:1rem;font-size:2.5rem}.button-group{align-items:center;gap:10px;display:flex}.sound-toggle{color:#fff;cursor:pointer;background:#ffffff0d;border:1px solid #ffffff1a;border-radius:8px;justify-content:center;align-items:center;width:40px;height:40px;font-size:1.2rem;transition:all .3s;display:flex}.sound-toggle:hover{border-color:var(--accent-primary);background:#ffffff1a;transform:scale(1.05)}.sound-toggle.off{opacity:.5;filter:grayscale()}.reset-btn{background:var(--danger-color);color:#fff;cursor:pointer;border:none;border-radius:12px;padding:.6rem 1.5rem;font-weight:800;transition:transform .2s}.total-display.clickable{cursor:pointer;-webkit-user-select:none;user-select:none;background:#ffffff0d;border:1px solid #ffffff1a;border-radius:8px;padding:.5rem 1rem;transition:all .3s}.total-display.clickable:hover{border-color:var(--accent-primary);background:#ffffff1a}.total-display.hidden .value-number{filter:blur(5px);color:var(--text-secondary)}.total-display.revealed .value-number{filter:none;color:var(--accent-primary)}.abacus-frame{direction:ltr;background:#000;border:4px solid #1e293b;border-radius:8px;flex-direction:row;justify-content:space-between;max-width:1100px;height:280px;margin:0 auto;padding:10px;display:flex;position:relative;overflow:hidden;box-shadow:0 25px 50px -12px #000c,inset 0 0 30px #ffffff0d}.abacus-rod{flex-direction:column;flex:1;align-items:center;height:100%;display:flex;position:relative}.rod-wire{z-index:1;background:linear-gradient(90deg,#111,#333,#111);width:2px;position:absolute;top:0;bottom:0}.heaven-section{z-index:2;justify-content:center;width:100%;height:60px;display:flex;position:relative}.earth-section{z-index:2;flex-direction:column;flex-grow:1;justify-content:flex-end;gap:0;width:100%;display:flex;position:relative}.abacus-bar{z-index:3;background:#111827;border-top:1px solid #ffffff1a;border-bottom:1px solid #00000080;justify-content:center;align-items:center;width:100%;height:12px;display:flex}.bar-dot{background:#38bdf8;border-radius:50%;width:5px;height:5px;box-shadow:0 0 10px #38bdf8}.bead{clip-path:polygon(50% 0%,100% 50%,50% 100%,0% 50%);cursor:pointer;z-index:4;opacity:1;background:linear-gradient(135deg,#334155 0%,#475569 100%);border:1px solid #ffffff1a;width:95%;height:28px;transition:all .2s 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