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1.5rem}}.hero{background:linear-gradient(135deg,var(--color-background) 0%,var(--color-background-alt) 100%);padding:8rem 0 4rem;text-align:center;position:relative;overflow:hidden}.hero:before{content:"";position:absolute;inset:0;background:radial-gradient(circle at 30% 20%,var(--color-accent-light) 0%,transparent 50%);pointer-events:none}.hero .container{max-width:1200px;margin:0 auto;padding:0 2rem;position:relative;z-index:1}.hero-content{max-width:800px;margin:0 auto}.hero-content h1{font-size:3.5rem;font-weight:700;color:var(--color-text-primary);margin-bottom:1.5rem;line-height:1.2;letter-spacing:-.025em}.hero-content p{font-size:1.25rem;color:var(--color-text-secondary);margin-bottom:2.5rem;line-height:1.6;max-width:600px;margin-left:auto;margin-right:auto}.hero-buttons{display:flex;gap:1rem;justify-content:center;flex-wrap:wrap}.hero-fade-in-up{animation:heroFadeInUp .8s ease-out}.hero-btn-learn-more{background:var(--color-surface);color:var(--color-text-primary);border:1px 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.btn{width:100%;max-width:280px}}.feature-card{background:var(--color-surface);border-radius:12px;padding:2rem;text-align:center;border:1px solid var(--color-border-light);transition:all .3s ease;opacity:0;transform:translateY(20px)}.feature-card:hover{transform:translateY(-5px);box-shadow:0 10px 40px #0000001a;border-color:var(--color-border)}.feature-card.animate-in{opacity:1;transform:translateY(0);animation:featureSlideIn .6s ease-out}.feature-card-icon{font-size:3rem;margin-bottom:1rem;display:block}.feature-card h3{font-size:1.25rem;font-weight:600;color:var(--color-text-primary);margin-bottom:1rem}.feature-card p{color:var(--color-text-secondary);line-height:1.6;margin:0}@keyframes featureSlideIn{0%{opacity:0;transform:translateY(20px)}to{opacity:1;transform:translateY(0)}}@media (max-width: 768px){.feature-card{padding:1.5rem}.feature-card-icon{font-size:2.5rem;margin-bottom:.75rem}.feature-card h3{font-size:1.125rem;margin-bottom:.75rem}.feature-card p{font-size:.9rem}}.features{padding:5rem 0;background:var(--color-background)}.features .container{max-width:1200px;margin:0 auto;padding:0 2rem}.features h2{text-align:center;font-size:2.5rem;font-weight:700;color:var(--color-text-primary);margin-bottom:3rem;letter-spacing:-.025em}.features-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(300px,1fr));gap:2rem}@media (max-width: 768px){.features{padding:3rem 0}.features .container{padding:0 1rem}.features h2{font-size:2rem;margin-bottom:2rem}.features-grid{grid-template-columns:1fr;gap:1.5rem}}.about{padding:5rem 0;background:linear-gradient(135deg,var(--color-accent-light) 0%,var(--color-background-alt) 100%);text-align:center;position:relative;overflow:hidden}.about:before{content:"";position:absolute;inset:0;background:radial-gradient(circle at 70% 80%,var(--color-accent) 0%,transparent 50%);pointer-events:none}.about .container{max-width:1200px;margin:0 auto;padding:0 2rem;position:relative;z-index:1}.about-content{max-width:700px;margin:0 auto}.about-content h2{font-size:2.5rem;font-weight:700;color:var(--color-text-primary);margin-bottom:1.5rem;line-height:1.2;letter-spacing:-.025em}.about-content p{font-size:1.125rem;color:var(--color-text-secondary);margin-bottom:2rem;line-height:1.6}.about-content .btn{font-size:1.125rem;padding:1rem 2.5rem}@media (max-width: 768px){.about{padding:3rem 0}.about .container{padding:0 1rem}.about-content h2{font-size:2rem;margin-bottom:1rem}.about-content p{font-size:1rem;margin-bottom:1.5rem}.about-content .btn{font-size:1rem;padding:.875rem 2rem;width:100%;max-width:280px}}.newsletter{padding:4rem 0;background:var(--color-background-alt);text-align:center}.newsletter .container{max-width:1200px;margin:0 auto;padding:0 2rem}.newsletter h2{font-size:2.25rem;font-weight:700;color:var(--color-text-primary);margin-bottom:1rem;letter-spacing:-.025em}.newsletter p{font-size:1.125rem;color:var(--color-text-secondary);margin-bottom:2rem;max-width:500px;margin-left:auto;margin-right:auto}.newsletter-form{display:flex;gap:1rem;max-width:500px;margin:0 auto 1rem;align-items:stretch}.newsletter-form input{flex:1;padding:1rem 1.5rem;border:1px solid var(--color-border);border-radius:8px;font-size:1rem;background:var(--color-surface);color:var(--color-text-primary);transition:all .2s ease}.newsletter-form input:focus{outline:none;border-color:var(--color-primary);box-shadow:0 0 0 3px #2563eb1a}.newsletter-form input::placeholder{color:var(--color-text-muted)}.newsletter-form .btn{padding:1rem 2rem;white-space:nowrap;min-width:120px}.newsletter-feedback{margin-top:1rem;padding:.75rem 1rem;border-radius:6px;font-weight:500;display:inline-block;min-width:150px}.newsletter-feedback.success{background:#f0fdf4;color:#166534;border:1px solid #BBF7D0}.newsletter-feedback.error{background:#fef2f2;color:#dc2626;border:1px solid #FECACA}@media (max-width: 768px){.newsletter{padding:3rem 0}.newsletter .container{padding:0 1rem}.newsletter h2{font-size:2rem}.newsletter p{font-size:1rem;margin-bottom:1.5rem}.newsletter-form{flex-direction:column;gap:.75rem}.newsletter-form input{padding:.875rem 1.25rem}.newsletter-form .btn{padding:.875rem 1.5rem}}.footer{background:var(--color-text-primary);color:var(--color-surface);padding:2rem 0;text-align:center}.footer .container{max-width:1200px;margin:0 auto;padding:0 2rem}.footer p{margin-bottom:.5rem;line-height:1.6}.footer p:first-child{font-weight:500;font-size:1rem}.footer p:last-child{color:#ffffffb3;font-size:.9rem;margin-bottom:0}@media (max-width: 768px){.footer{padding:1.5rem 0}.footer .container{padding:0 1rem}.footer p:first-child{font-size:.9rem}.footer p:last-child{font-size:.8rem}}.landing-page{min-height:100vh}.left-sidebar{width:240px;min-height:100vh;background:var(--color-surface);border-right:1px solid 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.nav-label{color:var(--color-primary);font-weight:600}.nav-icon{font-size:1.25rem;min-width:24px;display:flex;align-items:center;justify-content:center}.nav-label{color:var(--color-text-primary);font-weight:500;transition:color .2s ease}.nav-item:hover .nav-label{color:var(--color-primary)}.sidebar-footer{padding:1rem;border-top:1px solid var(--color-border);margin-top:auto}.user-profile{display:flex;align-items:center;justify-content:space-between;padding:.75rem;background:var(--color-background-alt);border-radius:12px;transition:background .2s ease}.user-profile:hover{background:var(--color-border)}.profile-avatar{width:40px;height:40px;border-radius:50%;background:var(--color-primary);display:flex;align-items:center;justify-content:center;font-size:.875rem;font-weight:600;color:#fff;flex-shrink:0}.logout-btn{background:none;border:none;padding:.5rem;cursor:pointer;border-radius:6px;color:var(--color-text-muted);transition:all .2s 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ease;background:var(--color-surface);box-shadow:2px 0 10px #0000001a}.left-sidebar.mobile-open{left:0}.sidebar-header{padding:1.5rem 1rem;border-bottom:1px solid var(--color-border);display:block}.sidebar-nav{flex:1;padding:1rem 0;display:flex;flex-direction:column}.nav-item{width:100%;display:flex;align-items:center;gap:1rem;padding:1rem 1.5rem;background:none;border:none;cursor:pointer;transition:all .2s ease;text-align:left;font-size:1rem;border-radius:0;border-right:none;flex-direction:row;color:var(--color-text-primary)}.nav-item:hover{background:var(--color-background-alt)}.nav-item.active{background:var(--color-accent-light);border-right:3px solid var(--color-primary);border-top:none}.nav-item.active .nav-label{color:var(--color-primary);font-weight:600}.nav-label{font-size:1rem;text-align:left;color:inherit;font-weight:500;transition:color .2s ease}.nav-item:hover .nav-label{color:var(--color-primary)}.sidebar-footer{padding:1rem;border-top:1px solid var(--color-border);margin-top:auto;display:block}.user-profile{display:flex;align-items:center;justify-content:space-between;padding:.75rem;background:var(--color-background-alt);border-radius:12px;transition:background .2s ease}.user-profile:hover{background:var(--color-border)}.profile-avatar{width:40px;height:40px;border-radius:50%;background:var(--color-primary);display:flex;align-items:center;justify-content:center;font-size:.875rem;font-weight:600;color:#fff;flex-shrink:0}.logout-btn{background:none;border:none;padding:.5rem;cursor:pointer;border-radius:6px;color:var(--color-text-muted);transition:all .2s ease;font-size:.875rem;display:flex;align-items:center;gap:.5rem;font-weight:500}.logout-btn:hover{background:var(--color-surface);color:var(--color-primary);transform:translate(2px)}.logout-icon{font-size:1rem;opacity:.7}}.mobile-header{display:none;position:fixed;top:0;left:0;right:0;background:var(--color-surface);border-bottom:1px solid var(--color-border);z-index:200;height:60px}.menu-toggle{width:100%;height:100%;background:none;border:none;display:flex;align-items:center;justify-content:space-between;padding:0 1rem;cursor:pointer;transition:all .2s ease}.menu-toggle:hover{background:var(--color-background-alt)}.logo-container{display:flex;align-items:center}.logo-text{font-size:1.25rem;font-weight:700;color:var(--color-text-primary);position:relative;letter-spacing:-.025em}.logo-accent{position:absolute;bottom:-2px;right:-6px;width:6px;height:6px;background:var(--color-primary);border-radius:50%}.hamburger-icon{display:flex;flex-direction:column;gap:4px;width:24px;height:18px}.hamburger-icon span{width:100%;height:2px;background:var(--color-text-primary);border-radius:1px;transition:all .3s ease;transform-origin:center}.menu-toggle.active .hamburger-icon span:nth-child(1){transform:rotate(45deg) translate(6px,6px)}.menu-toggle.active .hamburger-icon span:nth-child(2){opacity:0}.menu-toggle.active .hamburger-icon span:nth-child(3){transform:rotate(-45deg) translate(6px,-6px)}@media (max-width: 768px){.mobile-header{display:block}}.quiz-container{padding:2rem;max-width:800px;margin:0 auto}.quiz-start{text-align:center;padding:3rem 2rem;background:#fff;border-radius:16px;box-shadow:0 4px 16px #0000001a;border:1px solid var(--color-border)}.quiz-start h1{font-size:2.5rem;font-weight:700;color:var(--color-text-primary);margin-bottom:1rem}.quiz-start p{font-size:1.2rem;color:var(--color-text-secondary);margin-bottom:2rem;line-height:1.6}.quiz-info{display:flex;justify-content:center;gap:2rem;margin-bottom:3rem;flex-wrap:wrap}.info-item{display:flex;align-items:center;gap:.5rem;padding:1rem 1.5rem;background:var(--color-background-alt);border-radius:12px;border:1px solid var(--color-border)}.info-icon{font-size:1.5rem}.start-quiz-btn{background:linear-gradient(135deg,var(--color-primary) 0%,var(--color-primary-dark) 100%);color:#fff;border:none;padding:1rem 2rem;font-size:1.2rem;font-weight:600;border-radius:12px;cursor:pointer;transition:all .2s ease;box-shadow:0 4px 12px #007bff4d}.start-quiz-btn:hover{transform:translateY(-2px);box-shadow:0 6px 20px #007bff66}.quiz-header{margin-bottom:2rem}.progress-bar{width:100%;height:8px;background:var(--color-border);border-radius:4px;overflow:hidden;margin-bottom:1rem}.progress-fill{height:100%;background:linear-gradient(90deg,var(--color-primary) 0%,var(--color-primary-dark) 100%);transition:width .3s ease}.question-counter{font-size:1rem;color:var(--color-text-secondary);font-weight:500}.quiz-content{background:#fff;padding:2rem;border-radius:16px;box-shadow:0 4px 16px #0000001a;border:1px solid var(--color-border)}.question{font-size:1.5rem;font-weight:600;color:var(--color-text-primary);margin-bottom:2rem;line-height:1.4}.options{display:grid;gap:1rem;margin-bottom:2rem}.option{padding:1rem 1.5rem;background:var(--color-background-alt);border:2px solid var(--color-border);border-radius:12px;cursor:pointer;transition:all .2s ease;text-align:left;font-size:1rem;font-weight:500;color:var(--color-text-secondary)}.option:hover{border-color:var(--color-primary);background:#e3f2fd}.option.selected{background:var(--color-primary);border-color:var(--color-primary);color:#fff}.next-btn{background:var(--color-primary);color:#fff;border:none;padding:.75rem 2rem;font-size:1rem;font-weight:600;border-radius:8px;cursor:pointer;transition:all .2s ease;width:100%}.next-btn:hover:not(:disabled){background:var(--color-primary-dark);transform:translateY(-1px)}.next-btn:disabled{background:var(--color-text-muted);cursor:not-allowed;transform:none}.quiz-results{background:#fff;padding:2rem;border-radius:16px;box-shadow:0 4px 16px #0000001a;border:1px solid var(--color-border)}.results-header{text-align:center;margin-bottom:2rem;padding-bottom:2rem;border-bottom:1px solid #f0f0f0}.results-header 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