body, html {
    margin: 0;
    padding: 0;
    width: 100%;
    height: 100%;
    display: flex;
    justify-content: center;
    align-items: center;
    background-color: #000;
    overflow: hidden;
}

.intro {
    display: flex;
    justify-content: center;
    align-items: center;
    position: relative;
    font-size: 10vw;
    color: #fff;
}

.letter {
    opacity: 0;
    transform: scale(0);
    animation: appear 1s forwards, shine 1s 1s forwards;
}

#letterR { animation-delay: 0s; }
#letterV { animation-delay: 1s; }
#letterH { animation-delay: 2s; }
#letterA { animation-delay: 3s; }

@keyframes appear {
    to {
        opacity: 1;
        transform: scale(1);
    }
}

@keyframes shine {
    to {
        text-shadow: 0 0 20px #fff;
    }
}