*{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;background-color:#f5f5f5}.App{min-height:100vh;padding:20px 0}.book-form{background:#fff;padding:20px;border-radius:8px;box-shadow:0 2px 4px #0000001a;margin-bottom:20px}.book-list{background:#fff;padding:20px;border-radius:8px;box-shadow:0 2px 4px #0000001a}.book-card{border:1px solid #e0e0e0;border-radius:8px;padding:16px;margin-bottom:16px;background:#fff;transition:box-shadow .3s ease}.book-card:hover{box-shadow:0 4px 8px #00000026}@media (max-width: 768px){.App{padding:10px}.book-form,.book-list{padding:15px}}html,body{height:100%;margin:0;padding:0}#root{min-height:100vh;display:flex;flex-direction:column}.hero h1{font-size:3rem;margin-bottom:1rem;background:linear-gradient(135deg,#667eea,#764ba2);-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent;color:#333}