html{scroll-behavior:smooth}body{background:linear-gradient(135deg,#eef2f3,#dfe9f3);min-height:100vh;font-family:'Poppins',sans-serif;color:#333;display:flex;flex-direction:column;padding-top:70px}header{background:var(--chat_color1,#0078ff);color:#fff;padding:1.5rem 0;text-align:center}header h1{font-weight:700;font-size:2rem}header p{margin:0;opacity:.9}.hero-section{text-align:center;padding:30px 15px}.hero-section h2{font-size:1.8rem;font-weight:600}.btn-demo{background:var(--chat_color1,#0078ff);color:#fff;border-radius:50px;padding:12px 25px;transition:all 0.3s ease}.btn-demo:hover{background:#0056cc;color:#fff}#chat-section{display:none;margin:20px auto}footer{text-align:center;padding:20px;font-size:.9rem;color:#555;background:#f9f9f9;margin-top:auto}footer a{color:var(--chat_color1,#0078ff);text-decoration:none;font-weight:500}footer a:hover{text-decoration:underline}#chat-form-container{height:60vh}