.chat-float-btn {
    position: fixed; bottom: 20px; right: 20px;
    width: 60px; height: 60px;
    border-radius: 50%; background: #c00;
    box-shadow: 0 0 10px #fff;
    cursor: pointer; z-index: 999;
    display: flex; align-items: center; justify-content: center;
}
.chat-float-btn img { width: 80px; height: 80px; }

.chat-box {
    position: fixed; bottom: 90px; right: 20px;
    width: 90%; max-width: 400px;
    background: #fff; color: #000;
    border-radius: 10px; display: none; flex-direction: column;
    box-shadow: 0 0 10px black; z-index: 999;
}
.chat-header {
    background: #c00; padding: 10px; font-weight: bold; color: #fff;
    display: flex; align-items: center;
}
.chat-body {
    height: 280px; overflow-y: auto; padding: 10px;
    background: #f5f5f5; text-align: left;
}
.chat-body p { margin: 6px 0; line-height: 1.5; }
.chat-footer {
    display: flex; border-top: 1px solid #ccc;
}
.chat-footer input {
    flex: 1; padding: 10px; border: none;
    border-right: 1px solid #ccc; font-size: 1em;
}
.chat-footer button {
    background: #c00; color: #fff; border: none;
    padding: 10px; font-size: 1em; cursor: pointer;
}
.msg-user { color: #c00; font-weight: bold; }
.msg-bot { color: #333; }
#loading { font-style: italic; color: gray; display: none; }