.chat-container {
    scrollbar-width: thin;
    scrollbar-color: #4b5563 transparent;
}
.chat-container::-webkit-scrollbar {
    width: 6px;
}
.chat-container::-webkit-scrollbar-track {
    background: transparent;
}
.chat-container::-webkit-scrollbar-thumb {
    background-color: #4b5563;
    border-radius: 20px;
}
.typing-animation::after {
    content: '';
    animation: ellipsis 1.5s infinite;
}
@keyframes ellipsis {
    0% { content: '.'; }
    33% { content: '..'; }
    66% { content: '...'; }
    100% { content: '.'; }
}