*{box-sizing:border-box;font-family:Arial,Helvetica,sans-serif}body{margin:0;background:#ece5dd;display:flex;justify-content:center;align-items:center;height:calc(var(--vh,1vh) * 100)}.chat-container{width:100%;max-width:420px;height:100%;background:#fff;display:flex;flex-direction:column;overflow:hidden;box-shadow:0 0 15px rgba(0,0,0,.2)}.chat-header{background:#075e54;color:#fff;padding:10px;display:flex;align-items:center;flex-shrink:0}.chat-header img{width:40px;height:40px;margin-right:10px}.chat-header h3{margin:0;font-size:16px}.chat-header span{font-size:12px;opacity:.8}.message{max-width:80%;padding:8px 12px;margin-bottom:10px;border-radius:8px;font-size:17px;line-height:1.4;position:relative;user-select:text;-webkit-user-select:text;-moz-user-select:text;-ms-user-select:text}.message .time{bottom:2px;right:6px;font-size:10px;color:#999;margin-top:4px;text-align:right;position:static}.message.bot{background:#fff;align-self:flex-start}.message.user{background:#dcf8c6;align-self:flex-end;margin-left:auto}.chat-input{display:flex;padding:10px;background:#f0f0f0;flex-shrink:0}.chat-input input{flex:1;padding:10px;border-radius:20px;border:1px solid #ccc;outline:0;font-size:18px}.chat-input button{margin-left:10px;padding:10px 15px;border:none;background:#25d366;color:#fff;border-radius:20px;cursor:pointer;font-size:18px}.chat-messages::-webkit-scrollbar{width:5px}.chat-messages::-webkit-scrollbar-thumb{background:rgba(0,0,0,.2);border-radius:2px}.chat-messages{flex:1;padding:10px;overflow-y:auto;background:#e5ddd5;overscroll-behavior:contain}.message-content{white-space:normal}.message.bot .message-content{background:#fff;padding:10px;border-radius:8px}.message.bot .message-content button,.message.bot .message-content input,.message.bot .message-content select,.message.bot .message-content textarea{width:100%;margin-top:6px;padding:8px;font-size:14px}.overlay{position:fixed;top:0;left:0;width:100%;height:100%;background:rgba(255,255,255,0);display:none;align-items:center;justify-content:center;z-index:9999}.typing-dots{display:flex;gap:6px;align-items:flex-end}.typing-dots span{width:8px;height:8px;background:#25d366;border-radius:50%;display:inline-block;animation:1.2s ease-in-out infinite bounce}.typing-dots span:first-child{animation-delay:0s}.typing-dots span:nth-child(2){animation-delay:.2s}.typing-dots span:nth-child(3){animation-delay:.4s}@keyframes bounce{0%,100%,80%{transform:translateY(0)}40%{transform:translateY(-10px)}}.spinner{width:50px;height:50px;border:6px solid #f3f3f3;border-top:6px solid #25d366;border-radius:50%;animation:1s linear infinite spin}@keyframes spin{0%{transform:rotate(0)}100%{transform:rotate(360deg)}}