article {
    align-items: center;
    display: flex;
    flex-direction: column;
    height: 100%;
    justify-content: center;
    width: 100%;
}
body {
    background-color: #ff0000;
    box-sizing: border-box;
    color: #ffffff;
    font-family: "Source Code Pro", monospace;
    font-optical-sizing: auto;
    font-style: normal;
    height: 100dvh;
    margin: 0;
    width: 100dvw;
}
body::selection {
  color: #ff0000;
  background-color: #ffffff;
}
h1 {
    font-weight: 600;
}
h1,
p {
    margin: 0;
}
html {
    line-height: 1;
    -webkit-text-size-adjust: 100%;
}
p {
    font-weight: 300;
}
[hidden] {
    display: none;
}

@media (orientation: landscape) {
    h1 {
        font-size: 8rem;
    }
    p {
        font-size: 4rem;
    }
}

@media (orientation: portrait) {
    h1 {
        font-size: 4rem;
    }
    p {
        font-size: 2rem;
    }
}