.app{min-height:100vh;display:flex;align-items:center;justify-content:center;background:linear-gradient(135deg,#667eea,#764ba2);font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Oxygen,Ubuntu,Cantarell,Fira Sans,Droid Sans,Helvetica Neue,sans-serif}.app-header{text-align:center;color:#fff;max-width:800px;padding:2rem}.app-header h1{font-size:3.5rem;margin-bottom:1rem;font-weight:700;text-shadow:2px 2px 4px rgba(0,0,0,.3)}.app-header p{font-size:1.25rem;margin-bottom:3rem;opacity:.9}.features{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:2rem;margin-top:2rem}.feature{background:#ffffff1a;padding:1.5rem;border-radius:12px;-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);border:1px solid rgba(255,255,255,.2);transition:transform .3s ease,box-shadow .3s ease}.feature:hover{transform:translateY(-5px);box-shadow:0 10px 25px #0003}.feature h3{font-size:1.5rem;margin-bottom:.5rem;font-weight:600}.feature p{font-size:.9rem;opacity:.8;margin:0}@media (max-width: 768px){.app-header h1{font-size:2.5rem}.features{grid-template-columns:1fr}.app-header{padding:1rem}}*{margin:0;padding:0;box-sizing:border-box}body{margin:0;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Oxygen,Ubuntu,Cantarell,Fira Sans,Droid Sans,Helvetica Neue,sans-serif;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}#root{width:100%;min-height:100vh}