html, body {
    margin: 0;
    padding: 0;
    height: 100%;
}

.animate-flicker {
    animation: fadeInFromZero 2s;
    animation-timing-function: linear;
    animation-iteration-count: infinite;
}

.main-container {
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100%
}

.centered-container {
    width: 500px;
    text-align: center;
}

.centered-container h2 {
    color: #384b5c;
    font-size: 30px;
    font-weight: 300;
    line-height: 30px;
    text-rendering: optimizelegibility;
}

@keyframes fadeInFromZero {
    0% {
        opacity: 0;
    }
    25% {
        opacity: .25;
    }
    50% {
        opacity: .5;
    }
    75% {
        opacity: .75;
    }
    100% {
        opacity: 1;
    }
}