#activity-popup {
    position: fixed;
    bottom: 20px;
    left: -400px;
    width: 320px;
    background: white;
    box-shadow: 0 10px 30px rgba(0,0,0,0.15);
    border-radius: 16px;
    padding: 16px;
    display: flex;
    align-items: center;
    gap: 12px;
    z-index: 10000;
    transition: all 0.5s cubic-bezier(0.68, -0.55, 0.265, 1.55);
    border: 1px solid rgba(211, 47, 47, 0.1);
}

#activity-popup.active {
    left: 20px;
}

#activity-popup .icon-box {
    width: 48px;
    height: 48px;
    background: #fff5f5;
    color: #D32F2F;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
}

#activity-popup .content {
    flex: 1;
}

#activity-popup .title {
    font-size: 0.85rem;
    font-weight: 800;
    color: #1a1a1a;
    display: block;
    margin-bottom: 2px;
}

#activity-popup .time {
    font-size: 0.7rem;
    color: #a0a0a0;
    font-weight: 500;
}

#activity-popup .close-btn {
    position: absolute;
    top: 10px;
    right: 10px;
    color: #ddd;
    cursor: pointer;
    font-size: 0.8rem;
    transition: color 0.2s;
}

#activity-popup .close-btn:hover {
    color: #D32F2F;
}

@media (max-width: 576px) {
    #activity-popup {
        width: 280px;
        bottom: 80px; /* Above mobile bottom nav */
    }
}