/* Indicator: 横並びのドットが波のように明るくなるアニメーション（青系） */
.chat-indicator {
    display: flex;
    gap: 10px;
    align-items: center;
    justify-content: center;
    padding: 10px 0;
    bottom: 70px;
    position: fixed;
    left: 20px;
}

.chat-indicator .dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: linear-gradient(180deg, #4da3ff 0%, #0b6fb1 100%);
    opacity: 0.28;
    transform: translateY(0);
    animation: indicator-pulse 1.1s ease-in-out infinite;
}

.chat-indicator .dot:nth-child(1) { animation-delay: 0s; }
.chat-indicator .dot:nth-child(2) { animation-delay: 0.12s; }
.chat-indicator .dot:nth-child(3) { animation-delay: 0.24s; }
.chat-indicator .dot:nth-child(4) { animation-delay: 0.36s; }
.chat-indicator .dot:nth-child(5) { animation-delay: 0.48s; }

@keyframes indicator-pulse {
    0% {
        transform: translateY(0);
        opacity: 0.28;
        filter: brightness(0.9);
    }
    50% {
        transform: translateY(-6px);
        opacity: 1;
        filter: brightness(1.12);
    }
    100% {
        transform: translateY(0);
        opacity: 0.28;
        filter: brightness(0.9);
    }
}

/* 小さめの表示用バリエーション */
@media (max-width: 480px) {
    .chat-indicator .dot { width: 8px; height: 8px; }
}