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;display:flex;flex-direction:column}.main-content{flex:1;padding:20px;max-width:1200px;margin:0 auto;width:100%;box-sizing:border-box}.navbar{background-color:#2c3e50;color:#fff;padding:1rem 2rem;box-shadow:0 2px 4px #0000001a}.navbar-content{max-width:1200px;margin:0 auto;display:flex;justify-content:space-between;align-items:center}.navbar-brand{font-size:1.5rem;font-weight:700;text-decoration:none;color:#fff}.navbar-nav{display:flex;list-style:none;margin:0;padding:0;gap:2rem}.navbar-link{color:#fff;text-decoration:none;padding:.5rem 1rem;border-radius:4px;transition:background-color .3s}.navbar-link:hover{background-color:#ffffff1a}.navbar-link.active{background-color:#3498db}.card{background:#fff;border-radius:8px;padding:1.5rem;box-shadow:0 2px 10px #0000001a;margin-bottom:1rem}.card-header{margin-bottom:1rem}.card-title{margin:0 0 .5rem;color:#2c3e50}.card-content{line-height:1.6}.btn{padding:.75rem 1.5rem;border:none;border-radius:4px;cursor:pointer;font-size:1rem;text-decoration:none;display:inline-block;text-align:center;transition:all .3s}.btn-primary{background-color:#3498db;color:#fff}.btn-primary:hover{background-color:#2980b9}.btn-secondary{background-color:#95a5a6;color:#fff}.btn-secondary:hover{background-color:#7f8c8d}.btn-success{background-color:#27ae60;color:#fff}.btn-success:hover{background-color:#229954}.btn-danger{background-color:#e74c3c;color:#fff}.btn-danger:hover{background-color:#c0392b}.form-group{margin-bottom:1rem}.form-label{display:block;margin-bottom:.5rem;font-weight:700;color:#2c3e50}.form-control{width:100%;padding:.75rem;border:1px solid #ddd;border-radius:4px;font-size:1rem;box-sizing:border-box}.form-control:focus{outline:none;border-color:#3498db;box-shadow:0 0 0 2px #3498db33}.upload-area{border:2px dashed #bdc3c7;border-radius:8px;padding:2rem;text-align:center;background-color:#f8f9fa;cursor:pointer;transition:all .3s}.upload-area:hover,.upload-area.dragover{border-color:#3498db;background-color:#e3f2fd}.chapter-list{max-height:400px;overflow-y:auto;border:1px solid #ddd;border-radius:4px}.chapter-item{padding:.75rem 1rem;border-bottom:1px solid #eee;cursor:pointer;display:flex;justify-content:space-between;align-items:center;transition:background-color .2s}.chapter-item:hover{background-color:#f8f9fa}.chapter-item.active{background-color:#e3f2fd;color:#1976d2}.chapter-item:last-child{border-bottom:none}.chapter-status{font-size:.875rem;padding:.25rem .5rem;border-radius:12px;color:#fff}.chapter-status.translated{background-color:#27ae60}.chapter-status.original{background-color:#f39c12}.reader-container{display:grid;grid-template-columns:300px 1fr;gap:2rem;height:calc(100vh - 140px)}.chapter-sidebar{background:#fff;border-radius:8px;padding:1rem;box-shadow:0 2px 10px #0000001a;overflow-y:auto}.chapter-content{background:#fff;border-radius:8px;padding:2rem;box-shadow:0 2px 10px #0000001a;overflow-y:auto}.chapter-text{line-height:1.8;font-size:1.1rem;color:#2c3e50;white-space:pre-wrap}.chapter-controls{display:flex;gap:1rem;margin-bottom:1rem;padding-bottom:1rem;border-bottom:1px solid #eee}@media (max-width: 768px){.reader-container{grid-template-columns:1fr;gap:1rem}.chapter-sidebar{max-height:300px}.navbar-content{flex-direction:column;gap:1rem}.navbar-nav{gap:1rem}}.loading{display:flex;justify-content:center;align-items:center;padding:2rem}.spinner{border:4px solid #f3f3f3;border-top:4px solid #3498db;border-radius:50%;width:40px;height:40px;animation:spin 1s linear infinite}@keyframes spin{0%{transform:rotate(0)}to{transform:rotate(360deg)}}