:root{font-family:system-ui,Avenir,Helvetica,Arial,sans-serif;line-height:1.5;font-weight:400;color-scheme:light dark;color:#ffffffde;background-color:#242424;font-synthesis:none;text-rendering:optimizeLegibility;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}a{font-weight:500;color:#646cff;text-decoration:inherit}a:hover{color:#535bf2}body{margin:0;display:flex;place-items:center;min-width:320px;min-height:100vh}h1{font-size:3.2em;line-height:1.1}button{border-radius:8px;border:1px solid transparent;padding:.6em 1.2em;font-size:1em;font-weight:500;font-family:inherit;background-color:#1a1a1a;cursor:pointer;transition:border-color .25s}button:hover{border-color:#646cff}button:focus,button:focus-visible{outline:4px auto -webkit-focus-ring-color}@media (prefers-color-scheme: light){:root{color:#213547;background-color:#fff}a:hover{color:#747bff}button{background-color:#f9f9f9}}.app{min-height:100vh;background:linear-gradient(135deg,#667eea,#764ba2);font-family:Segoe 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#667eea4d}.tab-button:hover{transform:translateY(-2px);box-shadow:0 6px 20px #667eea66}.tab-button.active{background:#fff;color:#667eea;border-color:#667eea;box-shadow:0 4px 15px #667eea33}.upload-container{background:#fff;border-radius:20px;padding:2.5rem;box-shadow:0 10px 40px #0000001a;margin-bottom:2rem}.upload-container h2{color:#2d3748;margin-bottom:2rem;font-size:1.8rem;text-align:center}.upload-form{display:flex;flex-direction:column;gap:1.5rem;align-items:center}.file-input-container{position:relative;width:100%;max-width:500px}.file-input{position:absolute;opacity:0;width:100%;height:100%;cursor:pointer}.file-input-label{display:block;padding:1.5rem;border:2px dashed #cbd5e0;border-radius:12px;background:#f7fafc;text-align:center;cursor:pointer;transition:all .3s ease;font-weight:500;color:#4a5568}.file-input-label:hover{border-color:#667eea;background:#edf2f7;color:#667eea}.file-info{background:#f0f4f8;padding:1rem;border-radius:8px;text-align:left;width:100%;max-width:500px}.file-info p{margin:.5rem 0;color:#4a5568}.upload-button{padding:1rem 3rem;background:linear-gradient(135deg,#667eea,#764ba2);color:#fff;border:none;border-radius:50px;font-size:1.1rem;font-weight:600;cursor:pointer;transition:all .3s ease;box-shadow:0 4px 15px #667eea4d;display:flex;align-items:center;gap:.5rem}.upload-button:hover:not(:disabled){transform:translateY(-2px);box-shadow:0 6px 20px #667eea66}.upload-button:disabled{opacity:.6;cursor:not-allowed}.search-container{background:#fff;border-radius:20px;padding:2.5rem;box-shadow:0 10px 40px #0000001a}.search-container h2{color:#2d3748;margin-bottom:2rem;font-size:1.8rem;text-align:center}.search-form{margin-bottom:2rem}.search-input-container{display:flex;gap:1rem;max-width:600px;margin:0 auto}.search-input{flex:1;padding:1rem 1.5rem;border:2px solid #e2e8f0;border-radius:50px;font-size:1rem;outline:none;transition:all .3s ease}.search-input:focus{border-color:#667eea;box-shadow:0 0 0 3px #667eea1a}.search-button{padding:1rem 2rem;background:linear-gradient(135deg,#667eea,#764ba2);color:#fff;border:none;border-radius:50px;font-size:1rem;font-weight:600;cursor:pointer;transition:all .3s ease;display:flex;align-items:center;gap:.5rem;white-space:nowrap}.search-button:hover:not(:disabled){transform:translateY(-2px);box-shadow:0 4px 15px #667eea4d}.search-button:disabled{opacity:.6;cursor:not-allowed}.search-results{margin-top:2rem}.results-header h3{color:#2d3748;margin-bottom:1.5rem;font-size:1.4rem}.results-count{color:#718096;font-weight:400;font-size:1rem}.results-list{display:grid;gap:1.5rem}.result-card{background:#f8fafc;border:1px solid #e2e8f0;border-radius:12px;padding:1.5rem;transition:all .3s ease}.result-card:hover{transform:translateY(-2px);box-shadow:0 8px 25px #0000001a;border-color:#667eea}.result-header{display:flex;justify-content:space-between;align-items:flex-start;margin-bottom:1rem;flex-wrap:wrap;gap:1rem}.result-title{color:#2d3748;margin:0;font-size:1.2rem;flex:1;min-width:200px}.result-meta{display:flex;gap:1rem;color:#718096;font-size:.9rem;flex-wrap:wrap}.result-content{margin-bottom:1.5rem}.keywords-section,.topics-section{margin-bottom:1rem}.keywords-section strong,.topics-section strong{color:#4a5568;display:block;margin-bottom:.5rem}.tags{display:flex;flex-wrap:wrap;gap:.5rem}.tag{padding:.25rem .75rem;border-radius:20px;font-size:.85rem;font-weight:500}.keyword-tag{background:#e6fffa;color:#234e52;border:1px solid #81e6d9}.topic-tag{background:#fef5e7;color:#744210;border:1px solid #f6e05e}.more-tag{background:#edf2f7;color:#718096;border:1px solid #cbd5e0}.result-actions{display:flex;justify-content:flex-end}.view-button{padding:.5rem 1.5rem;background:linear-gradient(135deg,#667eea,#764ba2);color:#fff;text-decoration:none;border-radius:20px;font-weight:500;transition:all .3s ease;display:inline-flex;align-items:center;gap:.5rem}.view-button:hover{transform:translateY(-1px);box-shadow:0 4px 12px #667eea4d}.success-message{background:#f0fff4;border:1px solid #9ae6b4;border-radius:12px;padding:1.5rem;margin-top:1.5rem}.success-message h3{color:#22543d;margin:0 0 1rem}.upload-details{color:#2f855a}.upload-details p{margin:.5rem 0}.keywords-preview{margin:1rem 0}.keywords-preview strong{display:block;margin-bottom:.5rem}.download-link{display:inline-flex;align-items:center;gap:.5rem;padding:.5rem 1rem;background:#38a169;color:#fff;text-decoration:none;border-radius:6px;font-weight:500;margin-top:1rem;transition:background .3s ease}.download-link:hover{background:#2f855a}.error-message{background:#fed7d7;border:1px solid #feb2b2;border-radius:12px;padding:1rem;color:#c53030;margin-top:1rem;text-align:center}.error-text{color:#e53e3e;font-weight:500}.no-results{text-align:center;padding:3rem 1rem;color:#718096}.no-results p{margin:.5rem 0;font-size:1.1rem}.recent-upload-hint{background:#ffffffe6;padding:1rem;border-radius:12px;text-align:center;margin:1rem auto;max-width:600px;color:#4a5568;box-shadow:0 4px 12px #0000001a}.spinner{width:16px;height:16px;border:2px solid transparent;border-top:2px solid currentColor;border-radius:50%;animation:spin 1s linear infinite}@keyframes spin{0%{transform:rotate(0)}to{transform:rotate(360deg)}}@media (max-width: 768px){.main-content{padding:1rem}.app-title{font-size:2rem}.header-content{padding:1.5rem}.tab-navigation{flex-direction:column;align-items:center}.tab-button{width:200px}.search-input-container{flex-direction:column}.result-header{flex-direction:column;align-items:flex-start}.result-meta{justify-content:flex-start}}