static/css/_typing.css

/* ── typing indicator (waiting for model response) ── */
.typing-indicator {
    display: flex;
    align-items: center;
    gap: 5px;
    padding: 4px 0;
    height: 24px;
}
.typing-indicator span {
    width: 8px;
    height: 8px;
    background: var(--body-text-color-subdued, #999);
    border-radius: 50%;
    animation: typing-bounce 1.4s infinite ease-in-out both;
}
.typing-indicator span:nth-child(1) { animation-delay: 0s; }
.typing-indicator span:nth-child(2) { animation-delay: 0.2s; }
.typing-indicator span:nth-child(3) { animation-delay: 0.4s; }

@keyframes typing-bounce {
    0%, 80%, 100% {
        transform: scale(0.5);
        opacity: 0.35;
    }
    40% {
        transform: scale(1);
        opacity: 1;
    }
}