:root{font-family:system-ui,-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Oxygen,Ubuntu,Cantarell,sans-serif;line-height:1.5;font-weight:400;color-scheme:light;color:#213547;background-color:#fff;font-synthesis:none;text-rendering:optimizeLegibility;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}*{box-sizing:border-box}body{margin:0;min-width:320px;min-height:100vh}h1,h2,h3,h4,h5,h6{margin:0}button{font-family:inherit}#root{width:100%;min-height:100vh}.book{border:1px solid #e0e0e0;border-radius:8px;padding:1.5rem;margin-bottom:1.5rem;background-color:#fff;box-shadow:0 2px 4px #0000001a;transition:box-shadow .2s ease}.book:hover{box-shadow:0 4px 8px #00000026}.book-content{display:flex;gap:1.5rem;align-items:flex-start}.book-image-container{flex-shrink:0;width:150px;height:225px}.book-image{width:100%;height:100%;object-fit:cover;border-radius:4px;background-color:#f5f5f5}.book-details{flex:1;min-width:0}.book-title{margin:0 0 1rem;font-size:1.5rem;font-weight:600;color:#333;line-height:1.3}.book-toggle{background-color:#007bff;color:#fff;border:none;padding:.5rem 1rem;border-radius:4px;cursor:pointer;font-size:.9rem;font-weight:500;transition:background-color .2s ease;margin-bottom:1rem}.book-toggle:hover{background-color:#0056b3}.book-toggle:focus{outline:2px solid #007bff;outline-offset:2px}.book-toggle:active{background-color:#004085}.book-description{margin:0;line-height:1.6;color:#555;font-size:1rem}.book-description--empty{color:#999;font-style:italic}@media(max-width:768px){.book-content{flex-direction:column}.book-image-container{width:100%;height:auto;max-width:200px;margin:0 auto}.book-image{height:auto}.book-title{font-size:1.25rem;text-align:center}.book-toggle{width:100%}}.book-list-container{max-width:1200px;margin:0 auto;padding:2rem 1rem}.book-list-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:2rem;flex-wrap:wrap;gap:1rem}.book-list-title{margin:0;font-size:2rem;font-weight:700;color:#333}.book-list-add-button{background-color:#28a745;color:#fff;border:none;padding:.75rem 1.5rem;border-radius:4px;cursor:pointer;font-size:1rem;font-weight:500;transition:background-color .2s ease;white-space:nowrap}.book-list-add-button:hover{background-color:#218838}.book-list-add-button:focus{outline:2px solid #28a745;outline-offset:2px}.book-list-add-button:active{background-color:#1e7e34}.book-list{display:flex;flex-direction:column}.book-list-empty{text-align:center;padding:3rem;color:#999;font-size:1.1rem}@media(max-width:768px){.book-list-container{padding:1rem}.book-list-header{flex-direction:column;align-items:stretch}.book-list-title{font-size:1.5rem;text-align:center}.book-list-add-button{width:100%}}.app{min-height:100vh;background-color:#f8f9fa}