body{margin:0;font-family:Segoe UI,Tahoma,Geneva,Verdana,sans-serif;background-color:#fff;color:#333}.app-container{display:flex;flex-direction:column;min-height:100vh}.header{padding:60px 20px;background:linear-gradient(to right,#1976d2,#63a4ff);color:#fff;text-align:center}.app-title{font-size:2.5rem;margin-bottom:20px}.app-description{font-size:1.1rem;max-width:650px;margin:0 auto;line-height:1.6}.screenshots-section{padding:50px 20px;text-align:center}.section-title{font-size:2rem;margin-bottom:30px;color:#1976d2}.screenshots-container{display:flex;justify-content:center;flex-wrap:wrap;gap:20px}.screenshot{width:220px;border-radius:12px;box-shadow:0 6px 15px #00000026;transition:transform .3s,box-shadow .3s}.screenshot:hover{transform:scale(1.05);box-shadow:0 10px 25px #00000040}.footer{margin-top:auto;padding:20px;background-color:#f5f5f5;text-align:center;font-weight:700;color:#1976d2}