html,body{margin:0;padding:0;box-sizing:border-box}body{font-family:Inter,sans-serif;background-color:#f9f9f9;color:#333}.app-container{display:flex;flex-direction:column;min-height:100vh;padding-bottom:80px}.header{position:sticky;top:0;z-index:999;background-color:#7590e8;border-bottom:1px solid #e0e0e0;text-align:center;padding:20px 0}.header h1,.header h3{margin:0;color:#fff}.footer{position:fixed;bottom:0;left:0;width:100%;background-color:#fff;border-top:1px solid #e0e0e0;text-align:center;padding:10px 0;z-index:999}.footer .privacy{margin:0;font-size:1rem;font-weight:500;color:#0077b6}.footer .privacy a{text-decoration:none;color:inherit;transition:color .3s ease}.footer .privacy a:hover{color:#005f8d}.main-content{margin-top:80px;flex:1;max-width:800px;width:100%;margin-left:auto;margin-right:auto;padding:20px;box-sizing:border-box;overflow:hidden}.chat-container{display:flex;flex-direction:column;flex:1;background-color:#fff;border-radius:15px;padding:20px;box-shadow:0 2px 4px #0000001a;overflow-y:auto}.chat-message{display:flex;align-items:center;margin:10px 0;max-width:70%;padding:12px 16px;font-size:1rem;line-height:1.4;border-radius:20px}.chat-message.assistant{background-color:#eaf6ff;color:#333;margin-right:auto;border-top-left-radius:0}.chat-message.user{background-color:#0077b6;color:#fff;margin-left:auto;border-top-right-radius:0;text-align:right}.bot-icon{width:32px;height:32px;margin-right:8px;border-radius:50%}