*{box-sizing:border-box;margin:0;padding:0;font-family:system-ui,-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Oxygen,Ubuntu,Cantarell,Open Sans,Helvetica Neue,sans-serif}body{background-color:#f5f5f5;color:#111}header{background:#fff;border-bottom:1px solid #e5e5e5;padding:1rem 2rem;display:flex;justify-content:space-between;align-items:center}header h1{font-size:1.2rem;font-weight:600}header a{color:#111;text-decoration:none;margin-left:1rem;font-size:.95rem}header a:hover{text-decoration:underline}main{max-width:900px;margin:2rem auto;background:#fff;padding:2rem;border-radius:8px}input[type=text]{width:100%;padding:.75rem;border:1px solid #ddd;border-radius:6px;margin-bottom:2rem;font-size:.95rem}.book-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(200px,1fr));gap:1.5rem}.book-card{border:1px solid #eee;border-radius:6px;padding:1rem;transition:background .2s ease}.book-card:hover{background:#fafafa}.book-card h3{font-size:1rem;margin-bottom:.4rem}.book-card p{font-size:.85rem;color:#666}.details h1{margin-bottom:1rem}.details p{line-height:1.6;color:#444}.read-button,button{background:#111;color:#fff;border:none;padding:.6rem 1.2rem;border-radius:6px;cursor:pointer;font-size:.9rem;margin-top:1rem;transition:all .2s ease}.read-button:hover,button:hover{opacity:.85;background:#230781}@media(max-width:600px){main{margin:1rem;padding:1.5rem}}.button-group{display:flex;gap:1rem;margin-top:1rem}