/* https://stackoverflow.com/questions/54702124/rainbow-text-animation-using-only-css */
#shadowBox {
    background-color: rgb(0, 0, 0);
    /* Fallback color */
    background-color: rgba(0, 0, 0, 0.2);
    /* Black w/opacity/see-through */
    border: 3px solid;
}

.rainbow {
    text-align: center;
    text-decoration: none;
    font-size: 32px;
    font-family: monospace;
    letter-spacing: 5px;
}
.rainbow_text_animated {
    background: linear-gradient(135deg, #8e44ad, #2980b9 , #27ae60, #f39c12, #e67e22, #e74c3c, #8e44ad);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent !important;
    animation: rainbow_animation 10s ease-in-out infinite;
    background-size: 400% 100%;
}

@keyframes rainbow_animation {
    0%,100% {
        background-position: 0 0;
    }

    50% {
        background-position: 100% 100%;
    }
}