html,
body,
main {
    height: 100vh;
    width: 100vw;
}

html,
body,
main,
h1,
p {
    margin: 0;
    padding: 0;
}

body {
    background-color: black;
    color: darkslategrey;
    font-family: 'Roboto', sans-serif;
    text-align: center;
}

main {
    display: flex;
    flex-direction: column;
    justify-content: space-around;
}

h1,
p {
    margin-left: 20px;
    margin-right: 20px;
}

h1 {
    font-family: 'Roboto Mono', monospace;
    font-size: 2rem;
    letter-spacing: 4px;
    margin-bottom: 3rem;
}

p {
    font-size: 1rem;
    letter-spacing: 1px;
    line-height: 1.5;
}

p>strong {
    color: darkcyan;
    white-space: nowrap;
}

.puddle {
    color: cyan;
}

.theory {
    display: inline-block;
}

.launch {
    animation-duration: 5s;
    animation-name: fade-in;
    color: cyan;
    font-size: 3rem;
    font-weight: bold;
    letter-spacing: 4px;
    line-height: normal;
    text-shadow:
        0 0 100px cyan,
        0 0 200px cyan,
        0 0 300px cyan;
    transition-timing-function: ease-in;
}

::selection {
    background: darkturquoise;
}

@keyframes fade-in {
    0% {
        opacity: 0%;
    }

    100% {
        opacity: 100%;
    }
}

@media (min-width: 400px) and (min-height: 400px) {
    h1 {
        font-size: 2.5rem;
    }

    p {
        font-size: 1.25rem;
    }

    .launch {
        font-size: 3.75rem;
    }
}

@media (min-width: 800px) and (min-height: 800px) {
    h1 {
        font-size: 4rem;
    }

    p {
        font-size: 2rem;
    }

    .launch {
        font-size: 6rem;
    }
}