html, body, div, span, applet, object, iframe,
h1, h2, h3, h4, h5, h6, p, blockquote, pre,
a, abbr, acronym, address, big, cite, code,
del, dfn, em, img, ins, kbd, q, s, samp,
small, strike, strong, sub, sup, tt, var,
b, u, i, center,
dl, dt, dd, ol, ul, li,
fieldset, form, label, legend,
table, caption, tbody, tfoot, thead, tr, th, td,
article, aside, canvas, details, embed, 
figure, figcaption, footer, header, hgroup, 
menu, nav, output, ruby, section, summary,
time, mark, audio, video {
	margin: 0;
	padding: 0;
	border: 0;
	font-size: 100%;
	font: inherit;
	vertical-align: baseline;
}

body {
    display: flex;
    flex-flow: row;
    height: 100%;
    background: black;
    color: grey;
    font-size: min(2.6vh, 4.0vw);
    justify-content: space-around;
    line-height: 150%;
}

div.simple-center {
    display: flex;
    justify-content: center;
    padding: 2em;
}

a {
    text-decoration: none;
    color: white;
}

a {
    text-decoration: none;
    color: lightgrey;
}


.intro-text h3 {
    font-size: 180%;
    color: white;
    float: left;
    padding-right: 0.3em;
    padding-bottom: 0.1em;
    padding-top: 0.2em;
}

div.presentation {
    flex: 0 0 auto;
    display: flex;
    flex-flow: column;
    justify-content: space-between;
    padding: 5%;
    background: rgb(34,34,34);
    background: radial-gradient(circle at 100% 10%, rgba(0,0,0,1) 6%, rgba(45,45,45,1) 16%, rgba(57,57,57,1) 18%, rgba(8,8, 8,1) 20%, rgba(0,0,0,1) 30%);
    overflow: clip;
}

.presentation-text h1 {
    font-size: 300%;
    color: white;
    float: left;
    padding-right: 0.3em;
    padding-bottom: 0.1em;
    padding-top: 0.2em;
}

.presentation-text {
    max-width: 25em;
    text-align: justify;
}

.presentation-explore {
    max-width: 25em;
    text-align: justify;
}

div.intro-text {
    box-sizing: border-box;
    background: transparent;
    flex: 0 0 auto;
    padding: 5%;
    text-align: justify;
    position: relative;
    overflow: clip;
}

.intro-text-content {
    max-width: 25em;
    position: relative;
    z-index: 100;
    font-style: italic;
}

.div-background-1 {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -100;
    background: rgb(34,34,34);
    background: radial-gradient(circle at 10% 100%, rgba(0,0,0,0.5) 6%, rgba(45,45,45,0.5) 16%, rgba(57,57,57,0.5) 19%, rgba(3,3,3,0.5) 30%, rgba(0,0,0,0.5) 60%);
}

.div-background-2 {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -99;
    background: rgb(34,34,34);
    background: linear-gradient(117deg, rgba(34,34,34,0.5) 6%, rgba(68,68,68,0.5) 16%, rgba(57,57,57,0.5) 19%, rgba(3,3,3,0.5) 30%, rgba(0,0,0,0.5) 60%);}

@media screen and (max-aspect-ratio: 77/50) {
    body {
	flex-flow: column;
    }
    div.intro-text {
	height: 100vh;
    }
    div.presentation {
	height: 100vh;
	justify-content: space-between;
    }
}

@media screen and (min-aspect-ratio: 77/50) {
    body {
	flex-flow: row;
    }
    .next-page-button {
	display: none;
    }
    div.presentation {
	justify-content: space-between;
    }
}


@media (aspect-ratio: 1/1) {
  body {
      flex-flow: row;
  }
}

.next-page-button {
    height: 5vmax;
    
}