*{margin:0;padding:0;box-sizing:border-box}:root{--primary-color: #0078d4;--primary-hover: #106ebe;--secondary-color: #f3f2f1;--text-primary: #323130;--text-secondary: #605e5c;--border-color: #edebe9;--background: #ffffff;--sidebar-bg: #f3f2f1;--chat-user-bg: #e1f5fe;--chat-assistant-bg: #f5f5f5;--error-color: #d13438;--success-color: #107c10}body{font-family:Segoe UI,Tahoma,Geneva,Verdana,sans-serif;color:var(--text-primary);background-color:var(--background);line-height:1.6}h1,h2,h3,h4,h5,h6{font-weight:600;margin-bottom:.5rem}button{cursor:pointer;border:none;outline:none;font-family:inherit;transition:all .2s ease}button:disabled{opacity:.6;cursor:not-allowed}input,textarea{font-family:inherit;outline:none}a{color:var(--primary-color);text-decoration:none}a:hover{text-decoration:underline}.container{max-width:1200px;margin:0 auto;padding:0 20px}.btn{padding:8px 16px;border-radius:4px;font-size:14px;font-weight:600}.btn.btn-primary{background-color:var(--primary-color);color:#fff}.btn.btn-primary:hover:not(:disabled){background-color:var(--primary-hover)}.btn.btn-secondary{background-color:var(--secondary-color);color:var(--text-primary)}.btn.btn-secondary:hover:not(:disabled){background-color:#e1dfdd}.btn.btn-icon{padding:8px;background:transparent}.btn.btn-icon:hover:not(:disabled){background-color:var(--secondary-color)}.loading{display:inline-block;width:20px;height:20px;border:3px solid rgba(0,0,0,.1);border-radius:50%;border-top-color:var(--primary-color);animation:spin 1s ease-in-out infinite}@keyframes spin{to{transform:rotate(360deg)}}::-webkit-scrollbar{width:8px;height:8px}::-webkit-scrollbar-track{background:transparent}::-webkit-scrollbar-thumb{background:#c8c6c4;border-radius:4px}::-webkit-scrollbar-thumb:hover{background:#a19f9d}