:root{--primary:#f59e0b;--primary-hover:#d97706;--secondary:#6366f1;--bg-app:#f1f5f9;--bg-sidebar:#fff;--border-color:#e2e8f0;--text-main:#1e293b;--text-muted:#64748b;--grad-premium:linear-gradient(135deg, #10b981 0%, #3b82f6 50%, #06b6d4 100%);--math-font:"JetBrains Mono", "Roboto Mono", monospace;--math-size-h:22px;--math-size-v:24px;--operand-width:4ch}body{background:var(--bg-app);margin:0;padding:0;font-family:Inter,system-ui,sans-serif;overflow-x:hidden}.owl-app{width:100vw;min-height:100vh;display:flex}.owl-app.authenticated{height:100vh;overflow:hidden}.portal-content{flex-direction:column;flex:1;height:100vh;display:flex;overflow:hidden}.module-wrapper{flex-direction:row;width:100%;height:100%;display:flex;overflow:hidden}.module-sidebar{background:var(--bg-sidebar);border-right:1px solid var(--border-color);z-index:50;flex-direction:column;width:340px;min-width:340px;height:100%;display:flex}.sidebar-tabs{border-bottom:1px solid var(--border-color);background:#f8fafc;display:flex}.sidebar-tabs button{cursor:pointer;color:var(--text-muted);background:0 0;border:none;flex:1;padding:1rem;font-weight:800}.sidebar-tabs button.active{color:var(--secondary);border-bottom:3px solid var(--secondary);background:#fff}.sidebar-scroll{flex:1;padding:1.5rem;overflow-y:auto}.sidebar-section{background:#f8fafc;border:1px solid #f1f5f9;border-radius:12px;margin-bottom:1.5rem;padding:1.25rem}.btn-premium,.btn-secondary,.btn-dl{cursor:pointer;color:#fff;border:none;border-radius:12px;justify-content:center;align-items:center;gap:8px;width:100%;margin-bottom:8px;padding:12px;font-weight:800;transition:all .2s;display:flex}.btn-premium{background:linear-gradient(135deg,#10b981,#059669);box-shadow:0 4px 12px #10b98140}.btn-secondary,.btn-dl{background:linear-gradient(135deg,#6366f1,#4f46e5);box-shadow:0 4px 12px #6366f140}.btn-premium:hover,.btn-secondary:hover,.btn-dl:hover{transform:translateY(-1px)}.btn-premium:active,.btn-secondary:active,.btn-dl:active{transform:translateY(0)}.template{background:#cbd5e1;flex-direction:column;flex:1;align-items:center;padding:40px;display:flex;overflow-y:auto}.preview-canvas{flex-direction:column;align-items:center;gap:60px;width:100%;padding-bottom:120px;display:flex}.page{box-sizing:border-box;background:#fff;width:8.5in;height:11in;min-height:11in;padding:.5in;position:relative;overflow:hidden;box-shadow:0 40px 100px #00000026}.page.with-border{border:2px solid #000}.page-header-row{justify-content:center;align-items:center;width:100%;min-height:.8in;margin-bottom:10px;display:flex;position:relative}.logo-container{position:absolute;top:0;left:0}.school-identity{text-align:center}.school-identity h1{text-transform:uppercase;margin:0;font-size:1.8rem;font-weight:900}.student-info-box{background:#fafafa;border:3px solid #000;margin:15px 0;padding:15px}.student-info-row{justify-content:space-between;margin-bottom:12px;font-size:1rem;font-weight:900;display:flex}.worksheet-title-area{text-align:center;border-bottom:3px solid #000;margin-bottom:25px;padding-bottom:8px}.worksheet-title-text{text-transform:uppercase;font-size:1.6rem;font-weight:900}.problems-container{grid-auto-flow:column;width:100%;display:grid}.grid-3-col{grid-template-columns:repeat(3,1fr)}.grid-4-col{grid-template-columns:repeat(4,1fr)}.problem-wrapper{box-sizing:border-box;z-index:1;background:#fdfdfd;border:1px solid #f1f5f9;border-radius:8px;justify-content:center;align-items:center;margin:4px;padding:12px;display:flex;position:relative}.problem-idx{color:#94a3b8;font-size:10px;font-weight:900;position:absolute;top:4px;left:6px}.math-h{font-family:var(--math-font);align-items:center;gap:8px;font-size:20px;display:inline-flex}.math-h .ans-line{border-bottom:2px solid #000;min-width:50px;height:24px}.math-v{font-family:var(--math-font);flex-direction:column;align-items:flex-end;width:fit-content;margin:0 auto;font-size:24px;display:flex}.math-v .row-op{justify-content:flex-end;align-items:center;width:100%;display:flex;position:relative}.math-v .op{font-weight:900;position:absolute;left:-1.5ch}.math-v .calc-line{width:calc(var(--operand-width) + 1.2ch);border-top:3px solid #000;margin:2px 0}.ans-key-grid{grid-template-columns:repeat(2,1fr);gap:30px;margin-top:10px;display:grid}.ans-col{background:#fafafa;border:1px solid #e2e8f0;border-radius:10px;padding:15px}.ans-col h4{text-align:center;border-bottom:2px solid #000;margin:0 0 10px;padding-bottom:5px;font-size:14px;font-weight:900}.ans-item{font-size:11px;font-family:var(--math-font);border-bottom:1px dashed #eee;gap:6px;margin-bottom:4px;padding-bottom:2px;display:flex}.page-footer{text-align:center;color:#000;border-top:2px solid #000;padding-top:10px;font-size:.8rem;font-weight:900;position:absolute;bottom:.4in;left:.5in;right:.5in}.watermark{text-transform:uppercase;pointer-events:none;z-index:100;font-weight:900;position:absolute;top:50%;left:50%;transform:translate(-50%,-50%)rotate(-30deg)}.floating-toolbar{z-index:100;background:#fff;border:1px solid #e2e8f0;border-radius:50px;align-items:center;gap:15px;margin-bottom:30px;padding:10px 20px;display:flex;position:sticky;top:-20px;box-shadow:0 10px 30px #0000001a}.landing-container{flex-direction:column;width:100%;min-height:100vh;margin:0 auto;padding:0 2rem;font-family:Outfit,Inter,sans-serif;display:flex;position:relative}.kids-theme{--primary:#f59e0b;--secondary:#3b82f6;--accent:#ec4899;--text-dark:#0f172a;--bg-light:#f8fafc}.glass-card{-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);background:#ffffffe6;border:1px solid #ffffff80;border-radius:16px;box-shadow:0 8px 32px #0000000d}.landing-header{z-index:100;justify-content:space-between;align-items:center;margin-top:1rem;padding:1rem 2rem;display:flex;position:sticky;top:1rem}.landing-logo{align-items:center;gap:1rem;display:flex}.colorful-gradient{text-shadow:0 2px 4px #0009,0 0 10px #fff6;-webkit-print-color-adjust:exact;letter-spacing:-1px;border-radius:14px;justify-content:center;align-items:center;width:52px;height:52px;font-size:1.4rem;font-weight:950;box-shadow:0 4px 15px #ec489980;color:#fff!important;background:linear-gradient(135deg,#f59e0b,#ec4899)!important;display:flex!important}.brand-text span{color:var(--secondary);text-transform:uppercase;font-size:.8rem;font-weight:700}.landing-nav{align-items:center;gap:2rem;display:flex}.landing-nav a{color:#475569;font-weight:700;text-decoration:none;transition:color .2s}.landing-nav a:hover{color:var(--primary)}.btn-rainbow{background:linear-gradient(135deg, var(--primary), var(--accent), var(--secondary));text-transform:uppercase;letter-spacing:1px;background-size:200% 200%;border-radius:50px;padding:.75rem 1.5rem;font-weight:800;transition:transform .2s;animation:3s infinite gradient;box-shadow:0 4px 15px #f59e0b4d;color:#fff!important}.btn-rainbow:hover{transform:scale(1.05)}.btn-secondary{background:#e2e8f0;border-radius:50px;padding:.75rem 1.5rem;font-weight:800;transition:background .2s;color:#0f172a!important}.btn-secondary:hover{background:#cbd5e1}@keyframes gradient{0%{background-position:0%}50%{background-position:100%}to{background-position:0%}}.hero-section{grid-template-columns:1fr 1fr;align-items:center;gap:4rem;min-height:80vh;padding:10rem 0;display:grid}.kids-badge{color:#d97706;background:#fef3c7;border-radius:50px;margin-bottom:1.5rem;padding:.5rem 1rem;font-weight:800;display:inline-block}.hero-content h1{color:var(--text-dark);margin-bottom:1.5rem;font-size:3.5rem;font-weight:900;line-height:1.1}.text-gradient{background:linear-gradient(to right, var(--primary), var(--accent));-webkit-text-fill-color:transparent;-webkit-background-clip:text}.hero-content p{color:#64748b;margin-bottom:2.5rem;font-size:1.25rem;line-height:1.5}.btn-lg{padding:1rem 2.5rem;font-size:1.1rem}.preview-card{border-radius:24px;padding:2rem;transition:transform .3s;position:relative;transform:rotate(2deg)}.preview-card:hover{transform:rotate(0)}.preview-top{gap:8px;margin-bottom:1.5rem;display:flex}.dot{background:#e2e8f0;border-radius:50%;width:12px;height:12px}.dot:first-child{background:#ef4444}.dot:nth-child(2){background:#f59e0b}.dot:nth-child(3){background:#10b981}.tall-ws{background:#fff;border:2px dashed #cbd5e1;border-radius:16px;flex-direction:column;min-height:400px;display:flex;text-align:left!important;padding:1.5rem!important}.ws-header{border-bottom:2px solid #f1f5f9;align-items:center;gap:1rem;margin-bottom:1.5rem;padding-bottom:1rem;display:flex}.ws-logo-placeholder{background:#f1f5f9;border-radius:12px;justify-content:center;align-items:center;width:48px;height:48px;font-size:2rem;display:flex}.ws-title-group h3{color:#1e293b;margin:0;font-size:1.1rem;font-weight:800}.ws-title-group p{color:#64748b;margin:0;font-size:.75rem;font-weight:700}.ws-body{flex:1}.ws-problem-row{color:#334155;border-bottom:1px dashed #e2e8f0;margin-bottom:1rem;padding-bottom:.5rem;font-family:JetBrains Mono,monospace;font-size:.95rem;font-weight:700}.ws-footer-mark{text-align:center;color:#94a3b8;letter-spacing:1px;margin-top:1rem;font-size:.6rem;font-weight:800}.floating-anim{animation:6s ease-in-out infinite float}@keyframes float{0%,to{transform:translateY(0)rotate(2deg)}50%{transform:translateY(-20px)rotate(3deg)}}.animated-row{opacity:0;animation:.8s ease-out forwards slideIn;transform:translate(-20px)}@keyframes slideIn{to{opacity:1;transform:translate(0)}}.section-title{text-align:center;color:var(--text-dark);margin-bottom:3rem;font-size:2.5rem;font-weight:900}.features-section{padding:4rem 0}.features-grid{grid-template-columns:repeat(2,1fr);gap:2rem;display:grid}.f-card{text-align:center;background:#fff;border-radius:24px;padding:2.5rem;transition:transform .3s;box-shadow:0 10px 30px #0000000d}.f-card:hover{transform:translateY(-10px)}.f-card svg{width:48px;height:48px;margin-bottom:1.5rem}.f-card h3{color:var(--text-dark);margin-bottom:1rem;font-size:1.5rem;font-weight:800}.f-card p{color:#64748b;line-height:1.5}.how-section,.testimonial-section{text-align:center;padding:6rem 0}.steps-grid{grid-template-columns:repeat(3,1fr);gap:3rem;margin-top:4rem;display:grid}.step-card{position:relative}.step-num{background:var(--secondary);color:#fff;border-radius:50%;justify-content:center;align-items:center;width:40px;height:40px;margin:0 auto 1.5rem;font-size:1.2rem;font-weight:900;display:flex;box-shadow:0 4px 10px #3b82f666}.testimonial-box{max-width:800px;margin:0 auto;padding:4rem;position:relative}.quote-icon{color:var(--primary);opacity:.2;font-family:serif;font-size:5rem;position:absolute;top:1rem;left:2rem}.testimonial-box p{color:#334155;margin-bottom:2rem;font-size:1.5rem;font-weight:700;line-height:1.4}.author{flex-direction:column;display:flex}.author strong{color:var(--text-dark);font-size:1.1rem}.author span{color:#64748b;font-size:.9rem}.pricing-section{padding:4rem 0 8rem}.pricing-grid{grid-template-columns:repeat(3,1fr);gap:2rem;display:grid}.p-card{text-align:center;background:#fff;border:2px solid #0000;border-radius:24px;padding:3rem 2rem;transition:transform .3s;position:relative;box-shadow:0 10px 30px #0000000d}.p-card.featured{border-color:var(--primary);z-index:10;transform:scale(1.05);box-shadow:0 20px 40px #f59e0b1a}.p-card h3{color:var(--text-dark);margin-bottom:1rem;font-size:1.5rem;font-weight:800}.p-price{color:var(--text-dark);margin-bottom:2rem;font-size:3rem;font-weight:900}.p-price span{color:#94a3b8;font-size:1rem;font-weight:600}.p-features{text-align:left;margin:0 0 2rem;padding:0;list-style:none}.p-features li{color:#475569;margin-bottom:1rem;font-weight:600}.btn-p{width:100%;color:var(--text-dark);background:#f8fafc;border-radius:12px;padding:1rem;font-weight:800;text-decoration:none;transition:background .2s;display:inline-block}.p-card.featured .btn-p{background:var(--primary);color:#fff}.btn-p:hover{background:#e2e8f0}.p-card.featured .btn-p:hover{background:#d97706}.popular-badge{background:var(--accent);color:#fff;letter-spacing:1px;border-radius:20px;padding:4px 12px;font-size:.7rem;font-weight:900;position:absolute;top:-12px;left:50%;transform:translate(-50%)}.landing-footer{background:#f8fafc;border-top:1px solid #e2e8f0;margin-top:4rem;padding:4rem 0}.footer-content{text-align:center;max-width:1200px;margin:0 auto}.footer-brand{justify-content:center;align-items:center;gap:1rem;margin-bottom:2rem;display:flex}.footer-brand span{color:#1e293b;font-weight:800}.footer-links{justify-content:center;gap:2rem;margin-bottom:2rem;display:flex}.footer-links a{color:#64748b;font-size:.9rem;font-weight:700;text-decoration:none}.footer-links a:hover{color:var(--secondary)}.copyright{color:#94a3b8;font-size:.8rem}.login-container{background:#f8fafc;flex-direction:row;width:100vw;min-height:100vh;font-family:Inter,sans-serif;display:flex;overflow:hidden}.login-visual{background:linear-gradient(135deg,#7c3aed 0%,#3b82f6 100%);justify-content:center;align-items:center;width:50%;min-width:50%;padding:4rem;display:flex;position:relative;overflow:hidden}.visual-content{z-index:2;color:#fff;max-width:450px;animation:1s cubic-bezier(.16,1,.3,1) fade-in;position:relative}.visual-content h1{letter-spacing:-.025em;margin:1.5rem 0;font-size:3.5rem;font-weight:800;line-height:1.1}.visual-content p{opacity:.95;font-size:1.15rem;font-weight:300;line-height:1.6}.visual-shapes .shape{filter:blur(80px);border-radius:50%;position:absolute}.shape-1{background:#f43f5e66;width:500px;height:500px;animation:10s ease-in-out infinite alternate mesh1;top:-150px;right:-100px}.shape-2{background:#10b9814d;width:400px;height:400px;animation:12s ease-in-out infinite alternate mesh2;bottom:-100px;left:-100px}@keyframes mesh1{0%{transform:translate(0)scale(1)}to{transform:translate(-50px,50px)scale(1.1)}}@keyframes mesh2{0%{transform:translate(0)scale(1)}to{transform:translate(50px,-50px)scale(1.05)}}.login-form-side{background:#f8fafc;justify-content:center;align-items:center;width:50%;min-width:50%;padding:4rem;display:flex}.login-card{background:#fff;border-radius:24px;width:100%;max-width:420px;padding:3rem;box-shadow:0 25px 50px -12px #0f172a0d,0 0 0 1px #0f172a05}.login-header{text-align:center;margin-bottom:2.5rem}.login-header h2{color:#0f172a;letter-spacing:-.025em;margin-bottom:.5rem;font-size:1.75rem;font-weight:800}.login-header p{color:#475569;font-size:.95rem}.login-error{color:#ef4444;text-align:center;background:#fef2f2;border:1px solid #fecaca;border-radius:12px;margin-bottom:1.5rem;padding:1rem;font-size:.875rem;font-weight:500}.form-group label{color:#475569;text-transform:uppercase;letter-spacing:.05em;align-items:center;gap:.5rem;margin-bottom:.5rem;font-size:.75rem;font-weight:700;display:flex}.form-group input{color:#0f172a;background:#f8fafc;border:1px solid #e2e8f0;border-radius:12px;width:100%;padding:1rem 1.25rem;font-size:.95rem;transition:all .2s}.form-group input:focus{background:#fff;border-color:#7c3aed;outline:none;box-shadow:0 0 0 4px #7c3aed1a}.form-group input::placeholder{color:#94a3b8}.login-footer{text-align:center;color:#64748b;margin-top:2.5rem;font-size:.875rem}.login-footer a{color:#7c3aed;font-weight:700;text-decoration:none;transition:color .2s}.login-footer a:hover{color:#5b21b6}@media (width<=900px){.login-visual{display:none}.login-form-side{padding:2rem}}.dashboard-container{background:0 0;flex:1;padding:4rem;overflow-y:auto}.dashboard-header{justify-content:space-between;align-items:center;margin-bottom:4rem;display:flex}.dashboard-header h1{background:var(--grad-primary);-webkit-text-fill-color:transparent;letter-spacing:-.02em;-webkit-background-clip:text;margin-bottom:.5rem;font-size:3rem;font-weight:900}.dashboard-header p{color:var(--text-muted);font-size:1.1rem;font-weight:500}.school-tag{color:var(--primary);box-shadow:var(--shadow-md);border:1px solid var(--primary-light);background:#fff;border-radius:2rem;align-items:center;gap:.75rem;padding:.75rem 1.5rem;font-weight:800;display:flex}.stats-grid{grid-template-columns:repeat(auto-fit,minmax(300px,1fr));gap:2.5rem;display:grid}.stat-card{padding:2.5rem;position:relative;overflow:hidden}.stat-card:after{content:"";background:var(--primary-light);opacity:.3;z-index:0;border-radius:50%;width:150px;height:150px;position:absolute;top:-20%;right:-10%}.stat-icon{z-index:1;border-radius:1rem;justify-content:center;align-items:center;width:56px;height:56px;margin-bottom:1.5rem;display:flex;position:relative}.stat-value{color:var(--text-main);z-index:1;margin-bottom:.25rem;font-size:2.5rem;font-weight:900;position:relative}.stat-label{color:var(--text-light);text-transform:uppercase;letter-spacing:.05em;z-index:1;font-size:.8rem;font-weight:700;position:relative}.progress-container{z-index:1;background:#f1f5f9;border-radius:5px;height:10px;margin-top:1.5rem;position:relative}.progress-bar{border-radius:5px;height:100%;box-shadow:0 0 10px #6366f133}.quick-actions{margin-top:5rem}.quick-actions h2{color:var(--text-main);margin-bottom:2rem;font-size:1.75rem;font-weight:800}.action-cards{grid-template-columns:repeat(auto-fit,minmax(400px,1fr));gap:2.5rem;display:grid}.action-card{cursor:pointer;border:2px solid #0000;justify-content:space-between;align-items:center;padding:2rem;display:flex}.action-card:hover{border-color:var(--primary-light);background:#fff;transform:translateY(-5px)}.action-info h3{color:var(--primary);margin-bottom:.5rem;font-size:1.25rem;font-weight:800}.action-info p{color:var(--text-muted);font-weight:500}.nav-icon{color:var(--text-light);transition:transform .2s}.action-card:hover .nav-icon{color:var(--primary);transform:translate(5px)}.history-container{box-sizing:border-box;background:#f8fafc;height:100vh;padding:40px;width:100%!important;max-width:none!important;margin:0!important;overflow-y:auto!important}.history-header{justify-content:space-between;align-items:center;width:100%;margin-bottom:40px;display:flex}.history-header h1{color:#1e293b;letter-spacing:-2px;font-size:3rem;font-weight:950}.history-table th{color:#fff;text-transform:uppercase;letter-spacing:1.5px;background:linear-gradient(135deg,#6366f1 0%,#4f46e5 100%);border:none;padding:24px 16px;font-size:.8rem;font-weight:800}.history-table th:first-child{border-top-left-radius:20px}.history-table th:last-child{border-top-right-radius:20px}.history-table-wrap{background:#fff;border:1px solid #e2e8f0;border-radius:24px;width:100%;margin-bottom:60px;overflow:hidden;box-shadow:0 20px 50px #6366f10d}.history-table{border-collapse:collapse;table-layout:fixed;width:100%}.history-table td{vertical-align:middle;color:#475569;border-bottom:1px solid #f1f5f9;padding:20px 16px}.col-check{width:80px;text-align:center!important}.col-title{width:30%;text-align:left!important}.col-filename{width:25%;text-align:left!important}.col-date{width:15%;text-align:left!important}.col-validity{width:15%;text-align:center!important}.col-actions{width:160px;text-align:right!important}.history-row.row-selected{border-left:6px solid #6366f1;background:#6366f108!important}.btn-select-row.selected{color:#6366f1;filter:drop-shadow(0 0 8px #6366f14d)}.btn-download-mini,.btn-delete-mini{cursor:pointer;background:#fff;border:1px solid #e2e8f0;border-radius:12px;justify-content:center;align-items:center;width:40px;height:40px;transition:all .2s;display:flex}.btn-download-mini{color:#6366f1;background:#eef2ff;border-color:#e0e7ff}.btn-download-mini:hover{color:#fff;background:#6366f1;transform:translateY(-2px)}.btn-delete-mini{color:#ef4444;background:#fef2f2;border-color:#fee2e2}.btn-delete-mini:hover{color:#fff;background:#ef4444;transform:translateY(-2px)}.modal-overlay{-webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px);z-index:1000000;justify-content:center;align-items:center;display:flex;position:fixed;inset:0;background:#0f172acc!important}.modal-content{border:1px solid #e2e8f0;border-radius:32px;width:90%;max-width:420px;animation:.3s cubic-bezier(.34,1.56,.64,1) modalPop;position:relative;overflow:hidden;box-shadow:0 40px 100px #0006;background:#fff!important}.btn-danger-confirm{color:#fff;background:linear-gradient(135deg,#ef4444 0%,#dc2626 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