:root{--light-bg:#f8f9fa;--light-text:#333;--light-border:#dee2e6;--light-card-bg:#fff;--light-input-bg:#fff;--light-accent:#4361ee;--light-accent-hover:#3a56d4;--light-button-text:#fff;--light-hover-bg:#e9ecef;--light-shadow:#0000001a;--dark-bg:#121212;--dark-text:#e0e0e0;--dark-border:#333;--dark-card-bg:#1e1e1e;--dark-input-bg:#2d2d2d;--dark-accent:#7b68ee;--dark-accent-hover:#6a5acd;--dark-button-text:#fff;--dark-hover-bg:#2d2d2d;--dark-shadow:#0000004d}.book-excerpt-page{min-height:100vh;margin:0;padding:0;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Oxygen,Ubuntu,Cantarell,Open Sans,Helvetica Neue,sans-serif;line-height:1.6;transition:background-color .3s,color .3s}.light-mode{background-color:var(--light-bg);color:var(--light-text)}.light-mode input,.light-mode button{border-color:var(--light-border)}.light-mode .excerpt-item{background-color:var(--light-card-bg);box-shadow:0 2px 8px var(--light-shadow)}.light-mode .excerpt-item:hover{background-color:var(--light-hover-bg)}.dark-mode{background-color:var(--dark-bg);color:var(--dark-text)}.dark-mode input,.dark-mode button{border-color:var(--dark-border)}.dark-mode .excerpt-item{background-color:var(--dark-card-bg);box-shadow:0 2px 8px var(--dark-shadow)}.dark-mode .excerpt-item:hover{background-color:var(--dark-hover-bg)}.header{border-bottom:1px solid;border-color:inherit;justify-content:space-between;align-items:center;padding:1rem;display:flex}.header h1{margin:0;font-size:1.5rem}.header-controls{align-items:center;gap:1rem;display:flex}.simple-link{color:#fff;background-color:#38a169;border-radius:4px;padding:.35rem .75rem;font-size:.9rem;text-decoration:none;transition:background-color .3s}.simple-link:hover{background-color:#2f855a}.theme-toggle{cursor:pointer;background:0 0;border:none;padding:.5rem;font-size:1.5rem}.content-container{max-width:800px;margin:0 auto;padding:1rem}.search-container{text-align:center;padding:2rem 0}.description{margin-bottom:1.5rem;font-size:1.1rem}.input-group{max-width:100%;margin:0 auto;display:flex}.book-input{border:1px solid;border-radius:4px 0 0 4px;flex:1;padding:.75rem 1rem;font-size:1rem;transition:border-color .3s}.light-mode .book-input{background-color:var(--light-input-bg);color:var(--light-text)}.dark-mode .book-input{background-color:var(--dark-input-bg);color:var(--dark-text)}.search-button{cursor:pointer;border:1px solid;border-radius:0 4px 4px 0;padding:.75rem 1.5rem;font-size:1rem;transition:background-color .3s}.light-mode .search-button{background-color:var(--light-accent);color:var(--light-button-text)}.light-mode .search-button:hover:not(:disabled){background-color:var(--light-accent-hover)}.dark-mode .search-button{background-color:var(--dark-accent);color:var(--dark-button-text)}.dark-mode .search-button:hover:not(:disabled){background-color:var(--dark-accent-hover)}.search-button:disabled{opacity:.6;cursor:not-allowed}.excerpts-container{padding:1rem 0}.excerpts-container h2,.instruction{text-align:center;margin-bottom:1rem}.excerpts-list{flex-direction:column;gap:1rem;margin-bottom:1.5rem;display:flex}.excerpt-item{cursor:pointer;border-radius:8px;align-items:flex-start;padding:1rem;transition:transform .2s,box-shadow .2s;display:flex}.excerpt-item:hover{transform:translateY(-2px)}.excerpt-number{background-color:var(--light-accent);color:#fff;border-radius:12px;justify-content:center;align-items:center;min-width:24px;height:24px;margin-right:.75rem;font-size:.8rem;display:flex}.dark-mode .excerpt-number{background-color:var(--dark-accent)}.excerpt-content{flex:1;margin:0}.card-container{padding:1rem 0}.card-container h2{text-align:center;margin-bottom:1rem}.card-preview{border-radius:8px;width:100%;min-height:400px;margin-bottom:1.5rem;overflow:hidden}.preview-iframe{border:none;border-radius:8px;width:100%;height:500px}.loading{justify-content:center;align-items:center;height:400px;font-size:1.2rem;display:flex}.action-buttons{flex-wrap:wrap;justify-content:center;gap:1rem;display:flex}.download-button,.share-button,.back-button{cursor:pointer;border:1px solid;border-radius:4px;padding:.75rem 1.5rem;font-size:1rem;transition:background-color .3s}.light-mode .download-button,.light-mode .share-button{background-color:var(--light-accent);color:var(--light-button-text)}.light-mode .download-button:hover:not(:disabled),.light-mode .share-button:hover:not(:disabled){background-color:var(--light-accent-hover)}.dark-mode .download-button,.dark-mode .share-button{background-color:var(--dark-accent);color:var(--dark-button-text)}.dark-mode .download-button:hover:not(:disabled),.dark-mode .share-button:hover:not(:disabled){background-color:var(--dark-accent-hover)}.light-mode .back-button{color:var(--light-text);background-color:#0000}.light-mode .back-button:hover{background-color:var(--light-hover-bg)}.dark-mode .back-button{color:var(--dark-text);background-color:#0000}.dark-mode .back-button:hover{background-color:var(--dark-hover-bg)}.download-button:disabled,.share-button:disabled{opacity:.6;cursor:not-allowed}@media (max-width:768px){.input-group{flex-direction:column}.book-input{border-radius:4px;margin-bottom:.5rem}.search-button{border-radius:4px}.action-buttons{flex-direction:column}.download-button,.share-button,.back-button{width:100%}.card-preview{min-height:300px}.preview-iframe{height:400px}.header h1{font-size:1.2rem}}