@keyframes spin{to{transform:rotate(360deg)}}.auth-screen{justify-content:center;align-items:center;min-height:100vh;display:flex}.auth-box{text-align:center;background:#1a1a1a;border:1px solid #222;border-radius:12px;flex-direction:column;align-items:center;gap:1rem;width:100%;max-width:400px;padding:2.5rem;display:flex}.auth-sub{color:#666;font-size:.9rem}.auth-input{color:#e8e8e8;text-align:center;letter-spacing:.1em;background:#0f0f0f;border:1px solid #333;border-radius:8px;outline:none;width:100%;padding:.875rem 1rem;font-size:1rem}.auth-btn{color:#000;cursor:pointer;background:#fff;border:none;border-radius:8px;width:100%;padding:.875rem;font-size:1rem;font-weight:600}.auth-btn:hover{background:#e0e0e0}*{box-sizing:border-box;margin:0;padding:0}body{color:#e8e8e8;background:#0f0f0f;min-height:100vh;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,sans-serif}.container{max-width:800px;margin:0 auto;padding:2rem}.hero{text-align:center;flex-direction:column;justify-content:center;align-items:center;gap:1.5rem;min-height:100vh;display:flex}h1{color:#fff;font-size:2.5rem;font-weight:700}.subtitle{color:#888;font-size:1.1rem}.input-row{gap:.75rem;width:100%;max-width:600px;display:flex}.topic-input{color:#e8e8e8;background:#1a1a1a;border:1px solid #333;border-radius:8px;outline:none;flex:1;padding:.875rem 1rem;font-size:1rem}.topic-input:focus{border-color:#555}.research-btn{color:#000;cursor:pointer;background:#fff;border:none;border-radius:8px;padding:.875rem 1.5rem;font-size:1rem;font-weight:600}.research-btn:hover{background:#e0e0e0}.loading{text-align:center;flex-direction:column;justify-content:center;align-items:center;gap:1rem;min-height:100vh;display:flex}.spinner{border:3px solid #333;border-top-color:#fff;border-radius:50%;width:40px;height:40px;animation:.8s linear infinite spin}.loading-sub{color:#666;font-size:.9rem}.report{padding:2rem 0}.back-btn{color:#888;cursor:pointer;background:0 0;border:1px solid #333;border-radius:6px;margin-bottom:2rem;padding:.5rem 1rem;font-size:.9rem}.back-btn:hover{color:#ccc;border-color:#555}.section{background:#1a1a1a;border:1px solid #222;border-radius:12px;margin-top:2rem;padding:1.5rem}.section h2{color:#fff;margin-bottom:1rem;font-size:1.1rem}.content{color:#aaa;font-size:.95rem;line-height:1.8}.content h1,.content h2,.content h3{color:#fff;margin:1.25rem 0 .5rem;font-size:1rem}.content p{margin-bottom:.75rem}.content ul,.content ol{margin-bottom:.75rem;padding-left:1.5rem}.content li{margin-bottom:.4rem}.content strong{color:#e0e0e0}.error{color:#ff6b6b;font-size:.9rem}