.chat-unread-badge {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 16px;
    height: 16px;
    padding: 0 3px;
    background: #ef4444;
    border-radius: 8px;
    font-size: 10px;
    font-weight: 700;
    color: #fff;
    pointer-events: none;
    align-self: flex-start;
    margin-top: 4px;
    margin-right: -6px;
    animation: chat-badge-blink 1.2s ease-in-out infinite;
}

@keyframes chat-badge-blink {
    0%, 100% { opacity: 1; }
    50% { opacity: .3; }
}