*{margin:0;padding:0;box-sizing:border-box}body{font-family:Segoe UI,Tahoma,Geneva,Verdana,sans-serif;line-height:1.6;color:#333}.app{min-height:100vh;width:100%;display:flex;flex-direction:column}.header{background-color:#2c3e50;padding:1rem 0;position:sticky;top:0;z-index:100;box-shadow:0 2px 5px #0000001a}.navbar{max-width:100%;display:flex;justify-content:space-between;align-items:center;padding:0 2rem}.logo{font-size:1.8rem;font-weight:700;color:#ecf0f1}.nav-links{display:flex;list-style:none;gap:2rem}.nav-links a{color:#ecf0f1;text-decoration:none;transition:color .3s ease}.nav-links a:hover{color:#3498db}.hero{background:linear-gradient(135deg,#667eea,#764ba2);color:#fff;padding:8rem 2rem;text-align:center;flex:1}.hero-content h1{font-size:3.5rem;margin-bottom:1rem}.hero-content p{font-size:1.3rem;margin-bottom:2rem;opacity:.9}.cta-button{background-color:#3498db;color:#fff;border:none;padding:.8rem 2.5rem;font-size:1rem;border-radius:50px;cursor:pointer;transition:background-color .3s ease}.cta-button:hover{background-color:#2980b9}.features{padding:4rem 2rem;background-color:#f8f9fa;max-width:1200px;margin:0 auto;width:100%}.features h2{font-size:2.5rem;text-align:center;margin-bottom:3rem;color:#2c3e50}.features-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(300px,1fr));gap:2rem}.feature-card{background-color:#fff;padding:2rem;border-radius:8px;box-shadow:0 2px 10px #0000001a;transition:transform .3s ease,box-shadow .3s ease}.feature-card:hover{transform:translateY(-5px);box-shadow:0 5px 20px #00000026}.feature-card h3{color:#667eea;margin-bottom:.5rem;font-size:1.3rem}.feature-card p{color:#666}.about{padding:4rem 2rem;background-color:#fff;text-align:center;max-width:1200px;margin:0 auto;width:100%}.about h2{font-size:2.5rem;color:#2c3e50;margin-bottom:1rem}.about p{font-size:1.1rem;color:#666}.footer{background-color:#2c3e50;color:#ecf0f1;text-align:center;padding:2rem;margin-top:auto}@media(max-width:768px){.navbar{flex-direction:column;gap:1rem}.nav-links{gap:1rem}.hero-content h1{font-size:2rem}.hero-content p{font-size:1rem}.features h2,.about h2{font-size:1.8rem}}