/* Chat message send/receive animations — RTL-friendly, local only */

@keyframes chat-message-enter-user {
    from {
        opacity: 0;
        transform: translateX(0.75rem) translateY(0.5rem);
    }

    to {
        opacity: 1;
        transform: translateX(0) translateY(0);
    }
}

@keyframes chat-message-enter-assistant {
    from {
        opacity: 0;
        transform: translateX(-0.5rem) translateY(0.375rem);
    }

    to {
        opacity: 1;
        transform: translateX(0) translateY(0);
    }
}

@keyframes chat-message-initial-fade {
    from {
        opacity: 0;
        transform: translateY(0.25rem);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes chat-typing-pulse {
    0%,
    100% {
        opacity: 0.5;
    }

    50% {
        opacity: 1;
    }
}

/* Dynamic messages (send / SSE) */
.chat-message-enter--user {
    animation: chat-message-enter-user 300ms cubic-bezier(0.22, 1, 0.36, 1) both;
}

.chat-message-enter--assistant {
    animation: chat-message-enter-assistant 280ms cubic-bezier(0.22, 1, 0.36, 1) both;
}

/* Server-rendered history — lighter entrance with capped stagger */
.chat-message-initial--user {
    animation: chat-message-initial-fade 220ms ease-out both;
    animation-delay: calc(min(var(--chat-msg-index, 0), 8) * 30ms);
}

.chat-message-initial--assistant {
    animation: chat-message-initial-fade 200ms ease-out both;
    animation-delay: calc(min(var(--chat-msg-index, 0), 8) * 30ms);
}

/* Typing placeholder while SSE connects */
.chat-typing-indicator {
    display: inline-block;
    animation: chat-typing-pulse 1.6s ease-in-out infinite;
}

@media (prefers-reduced-motion: reduce) {
    .chat-message-enter--user,
    .chat-message-enter--assistant,
    .chat-message-initial--user,
    .chat-message-initial--assistant,
    .chat-typing-indicator {
        animation: none;
        opacity: 1;
        transform: none;
    }
}