:root{--bg-primary:#0a0a0f;--bg-secondary:#12121a;--bg-card:#1a1a24;--text-primary:#fff;--text-secondary:#a0a0b0;--accent:#6366f1;--accent-hover:#818cf8;--border:#2a2a3a;--success:#10b981}*{box-sizing:border-box;margin:0;padding:0}body{background:var(--bg-primary);color:var(--text-primary);min-height:100vh;font-family:Inter,-apple-system,BlinkMacSystemFont,sans-serif}.container{max-width:900px;margin:0 auto;padding:2rem}.header{text-align:center;margin-bottom:3rem;padding-top:2rem}.logo{background:linear-gradient(135deg,var(--accent),#a855f7);-webkit-text-fill-color:transparent;-webkit-background-clip:text;background-clip:text;margin-bottom:.5rem;font-size:2.5rem;font-weight:700}.tagline{color:var(--text-secondary);font-size:1rem}.search-container{margin-bottom:2rem}.search-box{background:var(--bg-secondary);border:1px solid var(--border);border-radius:12px;gap:.75rem;padding:.5rem;transition:border-color .2s,box-shadow .2s;display:flex}.search-box:focus-within{border-color:var(--accent);box-shadow:0 0 0 3px #6366f133}.search-input{color:var(--text-primary);background:0 0;border:none;outline:none;flex:1;padding:.75rem 1rem;font-size:1.1rem}.search-input::placeholder{color:var(--text-secondary)}.search-button{background:var(--accent);color:#fff;cursor:pointer;border:none;border-radius:8px;padding:.75rem 1.5rem;font-size:1rem;font-weight:500;transition:background .2s}.search-button:hover{background:var(--accent-hover)}.search-button:disabled{opacity:.6;cursor:not-allowed}.stats{color:var(--text-secondary);justify-content:center;gap:2rem;margin-bottom:2rem;font-size:.9rem;display:flex}.stat{align-items:center;gap:.5rem;display:flex}.stat-value{color:var(--accent);font-weight:600}.results-header{color:var(--text-secondary);justify-content:space-between;align-items:center;margin-bottom:1rem;display:flex}.results-list{flex-direction:column;gap:1rem;display:flex}.result-card{background:var(--bg-card);border:1px solid var(--border);border-radius:12px;padding:1.5rem;transition:border-color .2s,transform .2s}.result-card:hover{border-color:var(--accent);transform:translateY(-2px)}.result-header{justify-content:space-between;align-items:flex-start;margin-bottom:.75rem;display:flex}.result-title{color:var(--text-primary);flex:1;font-size:1.1rem;font-weight:600;line-height:1.4}.result-title a{color:inherit;text-decoration:none}.result-title a:hover{color:var(--accent)}.result-score{background:var(--accent);color:#fff;white-space:nowrap;border-radius:4px;margin-left:1rem;padding:.25rem .5rem;font-size:.75rem;font-weight:600}.result-meta{flex-wrap:wrap;gap:.5rem;margin-bottom:.75rem;display:flex}.result-id{color:var(--accent);font-family:monospace;font-size:.85rem}.result-category{background:var(--bg-secondary);color:var(--text-secondary);border-radius:4px;padding:.2rem .5rem;font-size:.75rem}.result-authors{color:var(--text-secondary);margin-bottom:.5rem;font-size:.9rem}.result-abstract{color:var(--text-secondary);font-size:.9rem;line-height:1.6}.loading{text-align:center;color:var(--text-secondary);padding:3rem}.spinner{border:3px solid var(--border);border-top-color:var(--accent);border-radius:50%;width:40px;height:40px;margin:0 auto 1rem;animation:1s linear infinite spin}@keyframes spin{to{transform:rotate(360deg)}}.empty-state{text-align:center;color:var(--text-secondary);padding:4rem 2rem}.empty-state h3{color:var(--text-primary);margin-bottom:.5rem;font-size:1.25rem}.error{color:#f87171;background:#ef44441a;border:1px solid #ef44444d;border-radius:8px;margin-bottom:1rem;padding:1rem}