:root{--primary-color:#2196f3;--primary-hover:#1976d2;--secondary-color:#ff9800;--accent-color:#42a5f5;--success-color:#4caf50;--warning-color:#ff9800;--error-color:#f44336;--text-primary:#333333;--text-secondary:#6c757d;--text-muted:#adb5bd;--text-light:#ced4da;--bg-primary:#ffffff;--bg-secondary:#f8f9fa;--bg-tertiary:#e9ecef;--bg-dark:#212529;--gradient-primary:linear-gradient(135deg, #2196f3 0%, #42a5f5 100%);--gradient-secondary:linear-gradient(135deg, #f8f9fa 0%, #e9ecef 100%);--gradient-hero:linear-gradient(135deg, #ffffff 0%, #f8f9fa 50%, #e3f2fd 100%);--shadow-sm:0 1px 2px 0 rgb(0 0 0 / 0.05);--shadow-md:0 4px 6px -1px rgb(0 0 0 / 0.1),0 2px 4px -2px rgb(0 0 0 / 0.1);--shadow-lg:0 10px 15px -3px rgb(0 0 0 / 0.1),0 4px 6px -4px rgb(0 0 0 / 0.1);--shadow-xl:0 20px 25px -5px rgb(0 0 0 / 0.15),0 8px 10px -6px rgb(0 0 0 / 0.1);--radius-sm:4px;--radius-md:8px;--radius-lg:12px;--radius-xl:16px;--radius-2xl:24px;--space-1:0.25rem;--space-2:0.5rem;--space-3:0.75rem;--space-4:1rem;--space-5:1.25rem;--space-6:1.5rem;--space-8:2rem;--space-10:2.5rem;--space-12:3rem;--space-16:4rem;--space-20:5rem;--space-24:6rem;--bp-sm:640px;--bp-md:768px;--bp-lg:1024px;--bp-xl:1280px;--bp-2xl:1536px}*{margin:0;padding:0;box-sizing:border-box}html{scroll-behavior:smooth}body{font-family:'Segoe UI',Tahoma,Geneva,Verdana,sans-serif;line-height:1.6;color:var(--text-primary);background-color:var(--bg-primary);overflow-x:hidden}h1,h2,h3,h4,h5,h6{font-weight:600;line-height:1.2;margin-bottom:var(--space-4)}h1{font-size:3.5rem;font-weight:700}h2{font-size:2.5rem}h3{font-size:1.875rem}h4{font-size:1.5rem}p{margin-bottom:var(--space-4);color:var(--text-secondary)}a{color:var(--primary-color);text-decoration:none;transition:color .2s ease}a:hover{color:var(--primary-hover)}.btn{display:inline-flex;align-items:center;gap:var(--space-2);padding:var(--space-3) var(--space-6);border:1px solid transparent;border-radius:var(--radius-md);font-size:.875rem;font-weight:500;text-decoration:none;cursor:pointer;transition:all .2s ease;white-space:nowrap}.btn-primary{background:var(--gradient-primary);color:#fff;border:none}.btn-primary:hover{transform:translateY(-1px);box-shadow:var(--shadow-lg);color:#fff}.btn-outline{background:0 0;color:var(--primary-color);border-color:var(--primary-color)}.btn-outline:hover{background:var(--primary-color);color:#fff}.btn-secondary{background:var(--bg-tertiary);color:var(--text-primary);border-color:var(--bg-tertiary)}.btn-secondary:hover{background:var(--secondary-color);color:#fff}.btn-large{padding:var(--space-4) var(--space-8);font-size:1rem}.btn-full{width:100%;justify-content:center}.container{max-width:1200px;margin:0 auto;padding:0 var(--space-6)}.nav{position:fixed;top:0;left:0;right:0;background:#fff;border-bottom:1px solid #e0e0e0;box-shadow:0 2px 8px rgba(0,0,0,.15);z-index:1000;transition:all .3s ease}.nav-container{max-width:1200px;margin:0 auto;padding:0 var(--space-6);display:flex;align-items:center;justify-content:space-between;height:64px}.nav-right{display:flex;align-items:center}.nav-logo{display:flex;align-items:center;gap:var(--space-2);font-size:1.5rem;font-weight:600;color:var(--primary-color)}.nav-icon{width:32px;height:32px;flex-shrink:0}.nav-links{display:flex;align-items:center;gap:var(--space-6)}.nav-link{color:var(--text-secondary);font-weight:500;transition:color .2s ease}.nav-link:hover{color:var(--primary-color)}.mobile-menu-btn{display:none;background:0 0;border:none;color:var(--text-primary);font-size:1.5rem;cursor:pointer}.landing-language-switcher{position:relative;display:inline-block;margin-left:var(--space-6)}.language-btn{display:flex;align-items:center;gap:var(--space-1);background:0 0;border:1px solid var(--text-light);padding:var(--space-2) var(--space-3);border-radius:var(--radius-md);color:var(--text-secondary);font-weight:500;cursor:pointer;transition:all .2s ease;font-size:.875rem}.language-btn:hover{border-color:var(--primary-color);color:var(--primary-color);background-color:rgba(33,150,243,.05)}.language-code{font-weight:600;min-width:20px;text-align:center;text-transform:uppercase}.language-menu{position:absolute;top:100%;right:0;background:#fff;border:1px solid var(--text-light);border-radius:var(--radius-md);box-shadow:var(--shadow-lg);min-width:160px;z-index:1000;opacity:0;visibility:hidden;transform:translateY(-10px);transition:all .2s ease}.language-menu.show{opacity:1;visibility:visible;transform:translateY(0)}.language-option{display:flex;align-items:center;gap:var(--space-3);padding:var(--space-3) var(--space-4);border:none;background:0 0;width:100%;text-align:left;color:var(--text-primary);cursor:pointer;transition:background-color .2s ease;font-size:.875rem}.language-option:hover{background-color:rgba(33,150,243,.05)}.language-option.active{background-color:rgba(33,150,243,.1);color:var(--primary-color);font-weight:600}.language-option .flag{font-size:1.2rem}.language-option .label{flex:1}.hero{padding:calc(64px + var(--space-20)) 0 var(--space-20);background:var(--gradient-hero);min-height:100vh;display:flex;align-items:center}.hero-container{max-width:1200px;margin:0 auto;padding:0 var(--space-6);display:grid;grid-template-columns:1fr 1fr;gap:var(--space-16);align-items:center}.hero-content{max-width:600px}.hero-title{font-size:4rem;line-height:1.1;margin-bottom:var(--space-6);color:var(--text-primary)}.hero-highlight{background:var(--gradient-primary);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}.hero-description{font-size:1.25rem;color:var(--text-secondary);margin-bottom:var(--space-8);line-height:1.6}.hero-actions{display:flex;gap:var(--space-4);margin-bottom:var(--space-12)}.hero-stats{display:flex;gap:var(--space-8)}.stat{text-align:center}.stat-number{display:block;font-size:1.5rem;font-weight:700;color:var(--primary-color)}.stat-label{font-size:.875rem;color:var(--text-muted)}.hero-visual{display:flex;justify-content:center;align-items:center}.hero-app-preview{position:relative}.app-mockup{background:#fff;border-radius:var(--radius-2xl);box-shadow:var(--shadow-xl);overflow:hidden;width:350px;transform:rotate(3deg);transition:transform .3s ease}.app-mockup:hover{transform:rotate(0) scale(1.05)}.mockup-header{background:var(--bg-tertiary);padding:var(--space-4);display:flex;align-items:center;gap:var(--space-3)}.mockup-controls{display:flex;gap:var(--space-1)}.mockup-controls span{width:12px;height:12px;border-radius:50%;background:var(--text-light)}.mockup-controls span:first-child{background:#ef4444}.mockup-controls span:nth-child(2){background:#f59e0b}.mockup-controls span:last-child{background:#10b981}.mockup-title{font-weight:600;color:var(--text-primary)}.mockup-content{padding:var(--space-6)}.mockup-exercise-card{display:flex;align-items:center;gap:var(--space-4);padding:var(--space-4);background:var(--bg-secondary);border-radius:var(--radius-lg);margin-bottom:var(--space-4)}.exercise-icon{font-size:2rem}.exercise-info h4{margin:0;font-size:1rem;color:var(--text-primary)}.exercise-info p{margin:0;font-size:.875rem;color:var(--text-muted)}.exercise-status{margin-left:auto;padding:var(--space-1) var(--space-3);background:var(--primary-color);color:#fff;border-radius:var(--radius-sm);font-size:.75rem;font-weight:600}.mockup-stats{display:flex;gap:var(--space-6);margin-top:var(--space-6)}.stat-item{text-align:center}.stat-value{display:block;font-size:1.5rem;font-weight:700;color:var(--primary-color)}.stat-name{font-size:.75rem;color:var(--text-muted)}section{padding:var(--space-20) 0}.section-header{text-align:center;margin-bottom:var(--space-16);max-width:600px;margin-left:auto;margin-right:auto}.section-header h2{margin-bottom:var(--space-4)}.section-header p{font-size:1.125rem;color:var(--text-secondary);margin-bottom:0}.features{background:var(--bg-primary)}.features-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(350px,1fr));gap:var(--space-8)}.feature-card{background:#fff;padding:var(--space-8);border-radius:var(--radius-xl);box-shadow:var(--shadow-md);text-align:center;transition:transform .3s ease,box-shadow .3s ease}.feature-card:hover{transform:translateY(-8px);box-shadow:var(--shadow-xl)}.feature-icon{width:80px;height:80px;background:var(--gradient-primary);border-radius:50%;display:flex;align-items:center;justify-content:center;margin:0 auto var(--space-6)}.feature-icon i{font-size:2rem;color:#fff}.feature-card h3{margin-bottom:var(--space-4);color:var(--text-primary)}.feature-card p{color:var(--text-secondary);margin-bottom:0}.how-it-works{background:var(--bg-secondary)}.steps-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(300px,1fr));gap:var(--space-8)}.step{display:flex;gap:var(--space-6);align-items:flex-start}.step-number{width:60px;height:60px;background:var(--gradient-primary);border-radius:50%;display:flex;align-items:center;justify-content:center;color:#fff;font-size:1.5rem;font-weight:700;flex-shrink:0}.step-content h3{margin-bottom:var(--space-3);color:var(--text-primary)}.step-content p{color:var(--text-secondary);margin-bottom:0}.pricing{background:var(--bg-primary)}.pricing-cards{display:grid;grid-template-columns:repeat(auto-fit,minmax(320px,1fr));gap:var(--space-8);max-width:1000px;margin:0 auto}.pricing-card{background:#fff;border:2px solid var(--bg-tertiary);border-radius:var(--radius-xl);padding:var(--space-8);position:relative;transition:transform .3s ease,box-shadow .3s ease}.pricing-card:hover{transform:translateY(-8px);box-shadow:var(--shadow-xl)}.pricing-card.featured{border-color:var(--primary-color);transform:scale(1.05)}.pricing-card.featured::before{content:'';position:absolute;top:0;left:0;right:0;height:4px;background:var(--gradient-primary);border-radius:var(--radius-xl) var(--radius-xl) 0 0}.pricing-badge{position:absolute;top:-12px;left:50%;transform:translateX(-50%);background:var(--gradient-primary);color:#fff;padding:var(--space-2) var(--space-4);border-radius:var(--radius-md);font-size:.875rem;font-weight:600}.pricing-header{text-align:center;margin-bottom:var(--space-8)}.pricing-header h3{margin-bottom:var(--space-4);color:var(--text-primary)}.price{display:flex;align-items:baseline;justify-content:center;gap:var(--space-2);margin-bottom:var(--space-2)}.price-amount{font-size:3rem;font-weight:700;color:var(--primary-color)}.price-period{color:var(--text-muted);font-size:1rem}.price-savings{color:var(--success-color);font-weight:600;font-size:.875rem}.pricing-features{margin-bottom:var(--space-8)}.feature{display:flex;align-items:center;gap:var(--space-3);margin-bottom:var(--space-4)}.feature i{color:var(--success-color);font-size:1.25rem}.feature span{color:var(--text-secondary)}.demo{background:var(--bg-secondary)}.demo-content{display:grid;grid-template-columns:1fr 1fr;gap:var(--space-16);align-items:center}.demo-info h2{margin-bottom:var(--space-6)}.demo-info p{font-size:1.125rem;margin-bottom:var(--space-8)}.demo-features{margin-bottom:var(--space-8)}.demo-feature{display:flex;align-items:center;gap:var(--space-3);margin-bottom:var(--space-4)}.demo-feature i{color:var(--primary-color);font-size:1.25rem}.video-placeholder{background:var(--bg-tertiary);border-radius:var(--radius-xl);padding:var(--space-16);text-align:center;border:2px dashed var(--text-light);transition:all .3s ease;cursor:pointer}.video-placeholder:hover{background:var(--bg-primary);border-color:var(--primary-color)}.video-placeholder i{font-size:4rem;color:var(--primary-color);margin-bottom:var(--space-4)}.video-placeholder span{display:block;font-size:1.5rem;font-weight:600;color:var(--text-primary);margin-bottom:var(--space-2)}.video-placeholder p{color:var(--text-muted);margin:0}.testimonials{background:var(--bg-primary)}.testimonials-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(350px,1fr));gap:var(--space-8)}.testimonial{background:#fff;padding:var(--space-8);border-radius:var(--radius-xl);box-shadow:var(--shadow-md);transition:transform .3s ease,box-shadow .3s ease}.testimonial:hover{transform:translateY(-4px);box-shadow:var(--shadow-lg)}.testimonial-content{margin-bottom:var(--space-6)}.testimonial-content p{font-style:italic;color:var(--text-secondary);margin-bottom:0;line-height:1.7}.testimonial-author{display:flex;align-items:center;gap:var(--space-4);margin-bottom:var(--space-4)}.author-avatar{width:50px;height:50px;background:var(--gradient-primary);border-radius:50%;display:flex;align-items:center;justify-content:center;color:#fff;font-weight:600;font-size:1.125rem}.author-name{font-weight:600;color:var(--text-primary);margin-bottom:var(--space-1)}.author-title{font-size:.875rem;color:var(--text-muted)}.testimonial-rating{display:flex;gap:var(--space-1)}.testimonial-rating i{color:#fbbf24;font-size:1rem}.cta{background:var(--bg-dark);color:#fff}.cta-content{text-align:center;max-width:600px;margin:0 auto}.cta h2{color:#fff;margin-bottom:var(--space-4)}.cta p{color:var(--text-light);font-size:1.125rem;margin-bottom:var(--space-8)}.signup-form{margin-bottom:var(--space-8)}.cta-form{margin-bottom:var(--space-8);text-align:center}.cta-form .btn{margin-bottom:var(--space-4)}.form-row{display:flex;gap:var(--space-4);margin-bottom:var(--space-4)}.form-row input{flex:1;padding:var(--space-4);border:1px solid rgba(255,255,255,.2);border-radius:var(--radius-md);background:rgba(255,255,255,.1);color:#fff;font-size:1rem}.form-row input::placeholder{color:rgba(255,255,255,.6)}.form-row input:focus{outline:0;border-color:var(--primary-color)}.form-disclaimer{font-size:.875rem;color:var(--text-light);margin:0}.form-disclaimer a{color:var(--accent-color)}.cta-benefits{display:flex;justify-content:center;gap:var(--space-8)}.benefit{display:flex;align-items:center;gap:var(--space-2);color:var(--text-light)}.benefit i{color:var(--success-color);font-size:1.25rem}.footer{background:var(--bg-dark);color:#fff;padding:var(--space-16) 0 var(--space-8)}.footer-content{display:grid;grid-template-columns:1fr 2fr;gap:var(--space-16);margin-bottom:var(--space-12)}.footer-brand p{color:var(--text-light);margin-bottom:0}.footer-logo{display:flex;align-items:center;gap:var(--space-2);font-size:1.25rem;font-weight:600;margin-bottom:var(--space-4)}.footer-icon{width:24px;height:24px;flex-shrink:0}.footer-logo i{color:var(--primary-color);font-size:1.5rem}.footer-links{display:grid;grid-template-columns:repeat(3,1fr);gap:var(--space-8)}.footer-section h4{color:#fff;margin-bottom:var(--space-4);font-size:1rem}.footer-section a{display:block;color:var(--text-light);margin-bottom:var(--space-2);transition:color .2s ease}.footer-section a:hover{color:var(--primary-color)}.footer-bottom{display:flex;justify-content:space-between;align-items:center;padding-top:var(--space-8);border-top:1px solid rgba(255,255,255,.1)}.footer-bottom p{color:var(--text-light);margin:0}.footer-social{display:flex;gap:var(--space-4)}.footer-social a{width:40px;height:40px;background:rgba(255,255,255,.1);border-radius:50%;display:flex;align-items:center;justify-content:center;color:var(--text-light);transition:all .2s ease}.footer-social a:hover{background:var(--primary-color);color:#fff;transform:translateY(-2px)}@media (max-width:1024px){.hero-container{grid-template-columns:1fr;gap:var(--space-12);text-align:center}.demo-content{grid-template-columns:1fr;gap:var(--space-12)}.footer-content{grid-template-columns:1fr;gap:var(--space-8)}.footer-links{grid-template-columns:repeat(2,1fr)}}@media (min-width:940px){.nav-links{display:flex!important;position:static!important;flex-direction:row!important;background:0 0!important;box-shadow:none!important;padding:0!important}.mobile-menu-btn{display:none!important}}@media (max-width:939px){:root{--space-4:0.75rem;--space-6:1rem;--space-8:1.5rem;--space-12:2rem;--space-16:2.5rem;--space-20:3rem}.nav-container{position:relative}.nav-right{display:flex;align-items:center;gap:var(--space-2)}.nav-links{display:none}.mobile-menu-btn{display:block}.landing-language-switcher{margin-left:var(--space-2);margin-right:var(--space-2)}.language-btn{padding:var(--space-1) var(--space-2);font-size:.75rem}.language-menu{right:-10px;min-width:140px}.hero-title{font-size:2.5rem}.hero-actions{flex-direction:column;gap:var(--space-3)}.hero-stats{justify-content:center;gap:var(--space-6)}.features-grid{grid-template-columns:1fr}.steps-grid{grid-template-columns:1fr}.pricing-cards{grid-template-columns:1fr}.pricing-card.featured{transform:none}.testimonials-grid{grid-template-columns:1fr}.form-row{flex-direction:column}.cta-benefits{flex-direction:column!important;gap:var(--space-4);align-items:center!important;justify-content:center!important}.footer .footer-content .footer-links{grid-template-columns:1fr!important;justify-items:center!important;display:grid!important;justify-content:center!important}.footer .footer-content .footer-links .footer-section{text-align:center!important}.footer-bottom{flex-direction:column;gap:var(--space-4);text-align:center}.app-mockup{width:280px}}@media (max-width:480px){.container{padding:0 var(--space-4)}.nav-container{padding:0 var(--space-4)}.hero{padding:calc(64px + var(--space-12)) 0 var(--space-12)}.hero-title{font-size:2rem}section{padding:var(--space-16) 0}.feature-card,.pricing-card,.testimonial{padding:var(--space-6)}.app-mockup{width:240px}}@keyframes fadeInUp{from{opacity:0;transform:translateY(30px)}to{opacity:1;transform:translateY(0)}}@keyframes fadeInLeft{from{opacity:0;transform:translateX(-30px)}to{opacity:1;transform:translateX(0)}}@keyframes fadeInRight{from{opacity:0;transform:translateX(30px)}to{opacity:1;transform:translateX(0)}}.animate-on-scroll{opacity:0;transform:translateY(30px);transition:all .6s ease}.animate-on-scroll.animate{opacity:1;transform:translateY(0)}.loading{opacity:.7;pointer-events:none}.loading::after{content:'';position:absolute;top:50%;left:50%;width:20px;height:20px;margin:-10px 0 0 -10px;border:2px solid var(--primary-color);border-radius:50%;border-top-color:transparent;animation:spin 1s linear infinite}@keyframes spin{to{transform:rotate(360deg)}}