*{
    box-sizing: border-box;
}
html{
    height: 100vh;
}
body{
    height: 100%;
    margin: 0;
    background-color: black;
    color: orange;
    display: flex;
    justify-content: center;
    align-items: center;
    font-family: Arial, Helvetica, sans-serif;
}
.letters{
    display: flex;
    flex-direction: row;
    justify-content: space-around;
}
.letter {
    font-size: 10rem;
    padding: 60px;
    color: orange; /* texten är alltid synlig */
    text-shadow: 0 0 20px orange, 0 0 40px red, 0 0 60px yellow;
    animation: glow-blink 1.5s infinite;
}

@keyframes glow-blink {
    0%, 100% {
        text-shadow: 0 0 20px orange, 0 0 40px red, 0 0 60px yellow;
    }
    50% {
        text-shadow: none; /* glödet försvinner men texten syns */
    }
}