.theme-pulse {
    position: relative;
    animation: 1s infinite;
}
.theme-pulse:after {
    content: "";
    position: absolute;
    left: 0px;
    top: 0px;
    animation: 2s infinite;
}
.theme-pulse-size,
.theme-pulse-size:after {
    display: inline-block;
    text-align: center;
    width: 80px;
    height: 80px;
    line-height: 80px;
    border-radius: 100%;
}
.theme-pulse-black,
.theme-pulse-black:after {
    animation-name: pulse_black;
}
@keyframes pulse_black {
    0% {
        box-shadow: 0px 0px 0px 0px rgba(0, 0, 0, 0.5);
    }
    100% {
        box-shadow: 0px 0px 0px 40px rgba(0, 0, 0, 0);
    }
}
.theme-pulse-white,
.theme-pulse-white:after {
    animation-name: pulse_white;
}
@keyframes pulse_white {
    0% {
        box-shadow: 0px 0px 0px 0px rgba(255, 255, 255, 0.5);
    }
    100% {
        box-shadow: 0px 0px 0px 40px rgba(255, 255, 255, 0);
    }
}
@keyframes dropdown_menu {
    from {
        transform: translateY(-1rem);
    }
    to {
        transform: translateY(0);
    }
}