/* --- AI Generating Placeholder (Capsule UI) --- */
.ai-generating-placeholder {
    display: flex;
    align-items: center;
    padding: 8px 0;
    min-height: 48px; /* CLS防止: カプセルの高さを確保 */
    background-color: transparent;
    opacity: 1;
    transition: opacity 0.3s ease;
}

.ai-generating-placeholder.hiding {
    opacity: 0;
    pointer-events: none;
}

/* 生成中はフッターを非表示（CSSのみで制御） */
.message-wrapper:has(.ai-generating-placeholder) .message-footer {
    display: none !important;
}

@media (prefers-reduced-motion: reduce) {
    .ai-generating-placeholder {
        transition: none;
    }
}