:root{--primary:#2563eb;--bg:#f3f4f6;--card:#fff;--text:#1f2937;--border:#e5e7eb;--success:#10b981;--danger:#ef4444;--dark-bg:#111;--dark-card:#1f2937;--dark-text:#f3f4f6}*{box-sizing:border-box}body{font-family:system-ui,sans-serif;background:var(--bg);color:var(--text);margin:0;padding:0}body.dark-mode{background:var(--dark-bg);color:var(--dark-text)}body.dark-mode .card{background:var(--dark-card);border-color:#374151}.container{max-width:1200px;margin:0 auto;padding:0 20px}.nav{background:var(--card);border-bottom:1px solid var(--border);padding:0;box-shadow:0 1px 3px rgba(0,0,0,0.1)}.nav-inner{max-width:1200px;margin:0 auto;padding:0 20px;display:flex;justify-content:space-between;align-items:center;height:60px}.nav-logo{font-size:1.25rem;font-weight:600;color:var(--primary);text-decoration:none;margin-right:30px}.nav-items{display:flex;gap:20px;align-items:center;flex:1}.nav-items a,.nav-items button{text-decoration:none;color:var(--text);font-size:0.95rem;cursor:pointer;border:none;background:none;padding:8px 12px;border-radius:6px;transition:background 0.2s}.nav-items a:hover,.nav-items button:hover{background:var(--bg)}.nav-items .active{color:var(--primary);font-weight:600}.nav-user{display:flex;align-items:center;gap:15px;margin-left:auto}.nav-toggle{display:none;flex-direction:column;gap:4px;cursor:pointer;border:none;background:none;padding:8px}body.dark-mode .nav{background:var(--dark-card);border-color:#374151}header{display:flex;justify-content:space-between;align-items:center;margin:30px 0;flex-wrap:wrap;gap:20px}h1{font-size:1.5rem;margin:0}h2{font-size:1.2rem;margin:20px 0 15px 0}h3{font-size:1rem;margin:0}p{margin:0}.btn,.link{text-decoration:none;color:var(--primary);font-weight:500;cursor:pointer;border:none;background:none;padding:0;transition:all 0.2s}.btn{background:var(--card);border:1px solid var(--border);padding:8px 16px;border-radius:6px;font-size:0.9rem;color:var(--text)}.btn:hover{background:var(--bg);border-color:var(--primary)}.btn.primary{background:var(--primary);color:#fff;border:none}.btn.primary:hover{opacity:0.9}.btn.danger{color:var(--danger)}.link:hover{text-decoration:underline}.card{background:var(--card);padding:20px;border-radius:8px;border:1px solid var(--border);box-shadow:0 1px 3px rgba(0,0,0,0.05)}.auth-card{max-width:400px;margin:50px auto;background:var(--card);padding:40px;border-radius:12px;border:1px solid var(--border);box-shadow:0 4px 6px rgba(0,0,0,0.1)}.auth-form input,.auth-form select{display:block;width:100%;padding:10px;margin:10px 0;border:1px solid var(--border);border-radius:6px;background:inherit;color:inherit;font-family:inherit}.auth-form button{width:100%;margin-top:15px}.stats-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(150px,1fr));gap:15px;margin-bottom:30px}.stat-card{background:var(--card);padding:20px;border-radius:8px;border-left:4px solid var(--primary);box-shadow:0 1px 3px rgba(0,0,0,0.05)}.stat-value{font-size:2rem;font-weight:700;color:var(--primary)}.stat-label{font-size:0.85rem;color:#6b7280;text-transform:uppercase;margin-top:5px}table{width:100%;border-collapse:collapse;background:var(--card);border-radius:8px;overflow:hidden;box-shadow:0 1px 3px rgba(0,0,0,0.05)}th,td{text-align:left;padding:12px 16px;border-bottom:1px solid var(--border)}th{background:var(--bg);font-size:0.85rem;text-transform:uppercase;color:#6b7280;font-weight:600}.badge{padding:4px 12px;border-radius:12px;font-size:0.75rem;font-weight:600;text-transform:uppercase;display:inline-block}.badge.active{background:#dcfce7;color:#166534}.badge.completed{background:#e2e8f0;color:#475569}.badge.failed{background:#fee2e2;color:#991b1b}.grid-meta{display:grid;grid-template-columns:repeat(auto-fit,minmax(150px,1fr));gap:15px}.grid-meta>div{background:var(--card);padding:15px;border-radius:8px;border:1px solid var(--border)}.grid-meta label{display:block;font-size:0.75rem;color:#6b7280;text-transform:uppercase;margin-bottom:4px}.grid-meta span{font-weight:600}.chat-container{background:var(--card);padding:20px;border-radius:8px;border:1px solid var(--border);max-height:500px;overflow-y:auto}.msg{display:flex;flex-direction:column;margin-bottom:15px}.msg.user{align-items:flex-end}.msg.ai{align-items:flex-start}.bubble{max-width:75%;padding:10px 14px;border-radius:16px;line-height:1.4;word-wrap:break-word}.user .bubble{background:var(--primary);color:#fff;border-bottom-right-radius:4px}.ai .bubble{background:var(--bg);color:var(--text);border-bottom-left-radius:4px}.time{font-size:0.7rem;color:#9ca3af;margin-top:4px;padding:0 5px}.hidden{display:none!important}.text-center{text-align:center}.empty{color:#9ca3af;font-style:italic;padding:20px;text-align:center}form{display:flex;flex-direction:column;gap:12px}input,textarea,select{padding:10px;border:1px solid var(--border);border-radius:6px;font-family:inherit;font-size:0.95rem;background:inherit;color:inherit}textarea{resize:vertical;min-height:100px}body.dark-mode .auth-form input,body.dark-mode .auth-form select,body.dark-mode input,body.dark-mode textarea,body.dark-mode select{border-color:#374151;background:var(--dark-card)}@media(max-width:768px){.nav-items{display:none;position:absolute;top:60px;left:0;right:0;flex-direction:column;background:var(--card);padding:20px;gap:10px;border-bottom:1px solid var(--border)}.nav-items.active{display:flex}.nav-toggle{display:flex}.nav-user{margin-left:0}.stats-grid{grid-template-columns:1fr}.grid-meta{grid-template-columns:1fr}header{flex-direction:column;align-items:flex-start}table{font-size:0.85rem}th,td{padding:8px}}