@keyframes pulsate {
    0% {
        box-shadow: 0 0 5px red;
    }

    50% {
        box-shadow: 0 0 20px red;
    }

    100% {
        box-shadow: 0 0 5px red;
    }
}

.glow-red {
    animation: pulsate 1s infinite;
    border-color: red;
}