*,*::before,*::after{margin:0;padding:0;box-sizing:border-box}:root{--primary:#4F46E5;--primary-light:#818CF8;--primary-dark:#3730A3;--secondary:#10B981;--accent:#F59E0B;--dark:#1E1B4B;--dark-light:#312E81;--gray-50:#F8FAFC;--gray-100:#F1F5F9;--gray-200:#E2E8F0;--gray-300:#CBD5E1;--gray-400:#94A3B8;--gray-500:#64748B;--gray-600:#475569;--gray-700:#334155;--gray-800:#1E293B;--gray-900:#0F172A;--white:#FFF;--radius:12px;--radius-lg:20px;--shadow:0 4px 6px -1px rgba(0,0,0,.1),0 2px 4px -2px rgba(0,0,0,.1);--shadow-lg:0 20px 25px -5px rgba(0,0,0,.1),0 8px 10px -6px rgba(0,0,0,.1);--shadow-xl:0 25px 50px -12px rgba(0,0,0,.25);--transition:all .3s ease}html{scroll-behavior:smooth;font-size:16px}body{font-family:'Inter',-apple-system,BlinkMacSystemFont,sans-serif;color:var(--gray-800);background:var(--white);line-height:1.6;overflow-x:hidden}.container{max-width:1200px;margin:0 auto;padding:0 24px}h1,h2,h3,h4{line-height:1.2;font-weight:700}h1{font-size:clamp(2.5rem,5vw,3.5rem)}h2{font-size:clamp(2rem,4vw,2.75rem)}h3{font-size:1.25rem}a{text-decoration:none;color:inherit}ul{list-style:none}.btn{display:inline-flex;align-items:center;justify-content:center;padding:12px 28px;border-radius:10px;font-weight:600;font-size:.95rem;cursor:pointer;transition:var(--transition);border:2px solid transparent;gap:8px}.btn-primary{background:var(--primary);color:var(--white);border-color:var(--primary)}.btn-primary:hover{background:var(--primary-dark);border-color:var(--primary-dark);transform:translateY(-2px);box-shadow:var(--shadow-lg)}.btn-outline{background:transparent;color:var(--primary);border-color:var(--primary)}.btn-outline:hover{background:var(--primary);color:var(--white);transform:translateY(-2px)}.btn-lg{padding:16px 36px;font-size:1.05rem}.btn-block{width:100%}.btn-sm{padding:8px 16px;font-size:.85rem}.navbar{position:fixed;top:0;left:0;right:0;z-index:1000;background:rgba(255,255,255,.95);backdrop-filter:blur(10px);border-bottom:1px solid var(--gray-200);padding:16px 0}.nav-content{display:flex;align-items:center;justify-content:space-between}.logo{display:flex;align-items:center;gap:10px;font-weight:700;font-size:1.1rem}.logo-icon{display:flex;align-items:center;justify-content:center;width:40px;height:40px;background:linear-gradient(135deg,var(--primary),var(--primary-light));color:var(--white);border-radius:10px;font-weight:800;font-size:.85rem}.nav-links{display:flex;gap:32px}.nav-links a{font-weight:500;color:var(--gray-600);transition:var(--transition);font-size:.95rem}.nav-links a:hover{color:var(--primary)}.nav-btn{padding:10px 24px;font-size:.9rem}.nav-auth{display:flex;gap:10px;align-items:center}.nav-user-name{font-weight:600;color:var(--primary);cursor:pointer;font-size:.95rem}.nav-user-name:hover{text-decoration:underline}.mobile-menu-btn{display:none;flex-direction:column;gap:5px;background:none;border:none;cursor:pointer;padding:5px}.mobile-menu-btn span{display:block;width:24px;height:2px;background:var(--gray-700);border-radius:2px;transition:var(--transition)}.hero{padding:140px 0 80px;background:linear-gradient(135deg,#F0EFFF 0%,#E8F4F8 50%,#FFF7ED 100%)}.hero .container{display:grid;grid-template-columns:1fr 1fr;gap:60px;align-items:center}.hero-badge{display:inline-block;padding:6px 16px;background:var(--primary);color:var(--white);border-radius:20px;font-size:.8rem;font-weight:600;margin-bottom:20px}.hero h1{margin-bottom:20px;color:var(--dark)}.gradient-text{background:linear-gradient(135deg,var(--primary),var(--secondary));-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}.hero-description{font-size:1.15rem;color:var(--gray-600);margin-bottom:32px;line-height:1.7}.hero-actions{display:flex;gap:16px;margin-bottom:48px}.hero-stats{display:flex;gap:40px}.stat{display:flex;flex-direction:column}.stat-number{font-size:1.75rem;font-weight:800;color:var(--dark)}.stat-label{font-size:.85rem;color:var(--gray-500)}.hero-card{background:var(--white);border-radius:var(--radius-lg);box-shadow:var(--shadow-xl);overflow:hidden;transform:rotate(2deg);transition:var(--transition)}.hero-card:hover{transform:rotate(0)}.card-header{display:flex;align-items:center;gap:12px;padding:16px 20px;background:var(--gray-50);border-bottom:1px solid var(--gray-200)}.card-dots{display:flex;gap:6px}.dot{width:10px;height:10px;border-radius:50%}.dot.red{background:#EF4444}.dot.yellow{background:#F59E0B}.dot.green{background:#10B981}.card-title{font-size:.85rem;color:var(--gray-500)}.card-body{padding:20px}.result-row{display:flex;justify-content:space-between;align-items:center;padding:12px 16px;border-radius:8px;margin-bottom:8px;background:var(--gray-50);transition:var(--transition)}.result-row:hover{background:var(--gray-100)}.student-name{font-weight:500;font-size:.95rem}.grade{display:flex;align-items:center;justify-content:center;width:36px;height:36px;border-radius:8px;font-weight:700;font-size:1.1rem;color:var(--white)}.grade-5{background:#10B981}.grade-4{background:#3B82F6}.grade-3{background:#F59E0B}.grade-2{background:#EF4444}.section-header{text-align:center;margin-bottom:60px}.section-header h2{margin-bottom:12px;color:var(--dark)}.section-header p{font-size:1.1rem;color:var(--gray-500);max-width:600px;margin:0 auto}.features{padding:100px 0}.features-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:30px}.feature-card{padding:32px;border-radius:var(--radius-lg);border:1px solid var(--gray-200);transition:var(--transition)}.feature-card:hover{border-color:var(--primary-light);box-shadow:var(--shadow-lg);transform:translateY(-4px)}.feature-icon{display:flex;align-items:center;justify-content:center;width:52px;height:52px;background:linear-gradient(135deg,var(--primary),var(--primary-light));border-radius:12px;margin-bottom:20px}.feature-icon svg{width:24px;height:24px;stroke:var(--white)}.feature-card h3{margin-bottom:10px}.feature-card p{color:var(--gray-500);font-size:.95rem;line-height:1.6}.how-it-works{padding:100px 0;background:var(--gray-50)}.steps{display:flex;align-items:flex-start;justify-content:center}.step{display:flex;flex-direction:column;align-items:center;text-align:center;max-width:300px;padding:0 20px}.step-number{display:flex;align-items:center;justify-content:center;width:64px;height:64px;background:linear-gradient(135deg,var(--primary),var(--primary-light));color:var(--white);border-radius:50%;font-size:1.5rem;font-weight:800;margin-bottom:24px}.step-content h3{margin-bottom:10px}.step-content p{color:var(--gray-500);font-size:.95rem}.step-connector{width:80px;height:2px;background:linear-gradient(to right,var(--primary-light),var(--primary));margin-top:32px;flex-shrink:0}.formats{padding:100px 0}.formats-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:30px}.format-card{padding:32px;border-radius:var(--radius-lg);border:1px solid var(--gray-200);transition:var(--transition)}.format-card:hover{border-color:var(--primary-light);box-shadow:var(--shadow)}.format-card.soon{opacity:.7}.format-badge{display:inline-block;padding:4px 12px;background:var(--primary);color:var(--white);border-radius:6px;font-size:.8rem;font-weight:600;margin-bottom:16px}.format-card.soon .format-badge{background:var(--gray-400)}.format-card h3{margin-bottom:10px}.format-card p{color:var(--gray-500);font-size:.95rem}.pricing{padding:100px 0;background:var(--gray-50)}.pricing-toggle{display:flex;align-items:center;justify-content:center;gap:16px;margin-bottom:48px}.toggle-label{font-weight:500;color:var(--gray-400);cursor:pointer;transition:var(--transition)}.toggle-label.active{color:var(--gray-800)}.discount-badge{display:inline-block;padding:2px 8px;background:var(--secondary);color:var(--white);border-radius:4px;font-size:.75rem;font-weight:600}.toggle-switch{position:relative;width:48px;height:26px;cursor:pointer}.toggle-switch input{display:none}.toggle-slider{position:absolute;inset:0;background:var(--gray-300);border-radius:13px;transition:var(--transition)}.toggle-slider::before{content:'';position:absolute;width:20px;height:20px;left:3px;bottom:3px;background:var(--white);border-radius:50%;transition:var(--transition)}.toggle-switch input:checked+.toggle-slider{background:var(--primary)}.toggle-switch input:checked+.toggle-slider::before{transform:translateX(22px)}.pricing-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:30px;align-items:start}.pricing-card{background:var(--white);border-radius:var(--radius-lg);padding:40px 32px;border:1px solid var(--gray-200);position:relative;transition:var(--transition)}.pricing-card:hover{box-shadow:var(--shadow-lg);transform:translateY(-4px)}.pricing-card.popular{border-color:var(--primary);box-shadow:var(--shadow-lg);transform:scale(1.05)}.pricing-card.popular:hover{transform:scale(1.05) translateY(-4px)}.popular-badge{position:absolute;top:-12px;left:50%;transform:translateX(-50%);padding:4px 20px;background:var(--primary);color:var(--white);border-radius:20px;font-size:.8rem;font-weight:600}.pricing-header{margin-bottom:24px}.pricing-header h3{font-size:1.5rem;margin-bottom:4px}.pricing-description{color:var(--gray-500);font-size:.95rem}.pricing-price{display:flex;align-items:baseline;gap:4px;margin-bottom:32px}.price{font-size:3rem;font-weight:800;color:var(--dark)}.currency{font-size:1.25rem;font-weight:600;color:var(--gray-500)}.period{font-size:.9rem;color:var(--gray-400)}.pricing-features{margin-bottom:32px}.pricing-features li{padding:8px 0;color:var(--gray-600);font-size:.95rem;position:relative;padding-left:28px}.pricing-features li::before{content:'';position:absolute;left:0;top:14px;width:16px;height:16px;background:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%2310B981' stroke-width='3'%3E%3Cpolyline points='20 6 9 17 4 12'%3E%3C/polyline%3E%3C/svg%3E") no-repeat center;background-size:contain}.faq{padding:100px 0}.faq-list{max-width:700px;margin:0 auto}.faq-item{border-bottom:1px solid var(--gray-200)}.faq-question{display:flex;justify-content:space-between;align-items:center;width:100%;padding:20px 0;background:none;border:none;cursor:pointer;font-size:1.05rem;font-weight:500;color:var(--gray-800);text-align:left;transition:var(--transition)}.faq-question:hover{color:var(--primary)}.faq-question svg{width:20px;height:20px;flex-shrink:0;transition:var(--transition);stroke:var(--gray-400)}.faq-item.active .faq-question svg{transform:rotate(180deg);stroke:var(--primary)}.faq-answer{max-height:0;overflow:hidden;transition:max-height .3s ease}.faq-item.active .faq-answer{max-height:200px}.faq-answer p{padding-bottom:20px;color:var(--gray-500);line-height:1.7}.contact{padding:100px 0;background:var(--gray-50)}.contact-grid{display:grid;grid-template-columns:1fr 1fr;gap:60px;align-items:start}.contact-form{background:var(--white);padding:40px;border-radius:var(--radius-lg);box-shadow:var(--shadow)}.form-group{margin-bottom:20px}.form-group label{display:block;margin-bottom:6px;font-weight:500;font-size:.9rem;color:var(--gray-700)}.form-group input,.form-group textarea{width:100%;padding:12px 16px;border:1px solid var(--gray-200);border-radius:10px;font-size:.95rem;font-family:inherit;transition:var(--transition);outline:none}.form-group input:focus,.form-group textarea:focus{border-color:var(--primary);box-shadow:0 0 0 3px rgba(79,70,229,.1)}.contact-info{display:flex;flex-direction:column;gap:32px;padding-top:20px}.contact-item{display:flex;gap:16px;align-items:flex-start}.contact-item svg{width:24px;height:24px;stroke:var(--primary);flex-shrink:0;margin-top:4px}.contact-item h4{margin-bottom:4px;font-size:1rem}.contact-item p{color:var(--gray-500)}.footer{padding:60px 0 30px;background:var(--dark);color:var(--gray-300)}.footer-content{display:grid;grid-template-columns:2fr 1fr 1fr;gap:60px;margin-bottom:40px}.footer-brand p{margin-top:16px;font-size:.9rem;line-height:1.6;color:var(--gray-400)}.footer .logo-text{color:var(--white)}.footer-links h4{color:var(--white);margin-bottom:16px;font-size:1rem}.footer-links a{color:var(--gray-400);font-size:.9rem;transition:var(--transition);display:block;padding:4px 0}.footer-links a:hover{color:var(--white)}.footer-bottom{border-top:1px solid var(--dark-light);padding-top:24px;text-align:center;font-size:.85rem;color:var(--gray-500)}.modal-overlay{display:none;position:fixed;inset:0;background:rgba(0,0,0,.5);z-index:2000;align-items:center;justify-content:center;backdrop-filter:blur(4px)}.modal-overlay.active{display:flex}.modal{background:var(--white);border-radius:var(--radius-lg);padding:40px;max-width:460px;width:90%;position:relative;box-shadow:var(--shadow-xl);max-height:90vh;overflow-y:auto}.modal-lg{max-width:640px}.modal-close{position:absolute;top:16px;right:20px;background:none;border:none;font-size:1.8rem;color:var(--gray-400);cursor:pointer;line-height:1}.modal-close:hover{color:var(--gray-700)}.modal h3{margin-bottom:8px;font-size:1.5rem}.modal-plan-name{color:var(--primary);font-weight:600;margin-bottom:4px}.modal-price{color:var(--gray-500);margin-bottom:24px;font-size:1.1rem}.auth-tabs{display:flex;margin-bottom:24px;border-bottom:2px solid var(--gray-200)}.auth-tab{flex:1;padding:12px;background:none;border:none;font-size:1rem;font-weight:600;color:var(--gray-400);cursor:pointer;border-bottom:2px solid transparent;margin-bottom:-2px;transition:var(--transition)}.auth-tab.active{color:var(--primary);border-bottom-color:var(--primary)}.auth-error{color:#EF4444;font-size:.85rem;margin-top:10px;min-height:20px}.dashboard-email{color:var(--gray-500);margin-bottom:24px}.dashboard-section{margin-bottom:24px}.dashboard-section h4{margin-bottom:12px;padding-bottom:8px;border-bottom:1px solid var(--gray-200)}.dashboard-list{display:flex;flex-direction:column;gap:8px}.empty-text{color:var(--gray-400);font-size:.9rem}.license-item{display:flex;justify-content:space-between;align-items:center;padding:12px 16px;background:var(--gray-50);border-radius:10px;flex-wrap:wrap;gap:8px}.license-key-small{font-family:'Courier New',monospace;font-weight:700;color:var(--primary-dark)}.license-plan{font-size:.85rem;color:var(--gray-500)}.license-expires{font-size:.85rem}.license-active{color:var(--secondary)}.license-expired{color:#EF4444}.order-item{display:flex;justify-content:space-between;align-items:center;padding:10px 16px;background:var(--gray-50);border-radius:10px}.order-status-paid{color:var(--secondary);font-weight:600}.order-status-pending{color:var(--accent);font-weight:600}.key-display{text-align:center}.key-display p{margin-bottom:12px;color:var(--gray-600)}.key-hint{font-size:.85rem;color:var(--gray-400);margin-bottom:16px}.license-key{font-family:'Courier New',monospace;font-size:1.4rem;font-weight:700;color:var(--primary-dark);background:var(--gray-50);border:2px dashed var(--primary-light);border-radius:10px;padding:16px 24px;margin-bottom:12px;letter-spacing:2px;user-select:all}@media(max-width:768px){.nav-links,.nav-auth{display:none}.mobile-menu-btn{display:flex}.hero .container{grid-template-columns:1fr;text-align:center}.hero-actions{justify-content:center;flex-wrap:wrap}.hero-stats{justify-content:center}.hero-visual{display:none}.features-grid,.formats-grid{grid-template-columns:1fr}.pricing-grid{grid-template-columns:1fr;max-width:400px;margin:0 auto}.pricing-card.popular{transform:none}.pricing-card.popular:hover{transform:translateY(-4px)}.steps{flex-direction:column;align-items:center}.step-connector{width:2px;height:40px;background:linear-gradient(to bottom,var(--primary-light),var(--primary))}.contact-grid,.footer-content{grid-template-columns:1fr}}@media(max-width:480px){.hero-actions{flex-direction:column}.hero-stats{flex-direction:column;gap:16px}.btn-lg{padding:14px 28px}}