:root{--primary: #667eea;--primary-dark: #764ba2;--success: #10b981;--danger: #ef4444;--warning: #f59e0b;--info: #3b82f6;--bg-light: #f8f9fa;--bg-dark: #0f172a;--text-primary: #1f2937;--text-secondary: #6b7280;--border: #e5e7eb}body{background:linear-gradient(135deg,var(--primary) 0%,var(--primary-dark) 100%);color:var(--text-primary)}::-webkit-scrollbar{width:8px;height:8px}::-webkit-scrollbar-track{background:#f1f1f1}::-webkit-scrollbar-thumb{background:#888;border-radius:4px}::-webkit-scrollbar-thumb:hover{background:#555}.btn{padding:10px 20px;border:none;border-radius:8px;font-size:14px;font-weight:600;cursor:pointer;transition:all .3s;display:inline-flex;align-items:center;gap:8px}.btn:disabled{opacity:.6;cursor:not-allowed}.btn-primary{background:linear-gradient(135deg,var(--primary) 0%,var(--primary-dark) 100%);color:#fff}.btn-primary:hover:not(:disabled){transform:translateY(-2px);box-shadow:0 8px 20px #667eea66}.btn-secondary{background:#6b7280;color:#fff}.btn-danger{background:var(--danger);color:#fff}.btn-success{background:var(--success);color:#fff}.input{width:100%;padding:12px 16px;border:2px solid var(--border);border-radius:8px;font-size:14px;transition:border-color .3s}.input:focus{outline:none;border-color:var(--primary)}.card{background:#fff;border-radius:16px;padding:24px;box-shadow:0 4px 12px #0000001a}@keyframes spin{to{transform:rotate(360deg)}}.loading{display:inline-block;width:20px;height:20px;border:3px solid rgba(255,255,255,.3);border-radius:50%;border-top-color:#fff;animation:spin 1s linear infinite}@keyframes fadeIn{0%{opacity:0;transform:translateY(10px)}to{opacity:1;transform:translateY(0)}}.fade-in{animation:fadeIn .3s ease-in-out}.markdown-content h1,.markdown-content h2,.markdown-content h3{margin:16px 0 8px;font-weight:600}.markdown-content h2{border-bottom:1px solid var(--border);padding-bottom:4px}.markdown-content p{margin:8px 0;line-height:1.6}.markdown-content ul,.markdown-content ol{padding-left:20px;margin:8px 0}.markdown-content li{margin:4px 0}.markdown-content pre{background:var(--bg-dark);color:#e5e7eb;padding:16px;border-radius:8px;overflow-x:auto;font-size:13px;margin:12px 0}.markdown-content code{background:#f1f5f9;padding:2px 6px;border-radius:4px;font-size:13px;font-family:Courier New,monospace}.markdown-content pre code{background:transparent;padding:0}.markdown-content table{width:100%;border-collapse:collapse;margin:12px 0}.markdown-content th,.markdown-content td{border:1px solid var(--border);padding:8px 12px;text-align:left}.markdown-content th{background:var(--bg-light);font-weight:600}