:root {
    --flashbulb-duration: 4.33s;
}

.flashbulb {
    position: absolute;
    left: 50%;
    top: 50%;
    width: 4px;
    height: 4px;
    border-radius: 50%;
    transform: translate(-50%, -50%);
    opacity: 0;
    background: #fff;
    animation: 
        fadeFlashbulb var(--flashbulb-duration) ease-in-out infinite,
        glowFlashbulb var(--flashbulb-duration) ease-in-out infinite !important;
}

@keyframes fadeFlashbulb {
    0% { opacity: 0; }
    2.3% { opacity: 1; }
    5.4% { opacity: 1; }
    7.7% { opacity: 0; }
    100% { opacity: 0; }
}

@keyframes glowFlashbulb {
    0% { box-shadow: none; }
    1.9%, 3.4% { 
        box-shadow: 
            0 0 15px 8px rgba(255, 255, 255, 0.95),
            0 0 30px 15px rgba(255, 255, 255, 0.4),
            0 0 50px 25px rgba(255, 255, 255, 0.2);
    }
    6% { box-shadow: none; }
    100% { box-shadow: none; }
}