body {
    font-family: sans-serif;
	font-size: 1.8vw;
    margin: 0;
    padding: 0;
    position: absolute;
}
header {
    backdrop-filter: blur(5px) brightness(90%);
    display: block;
    padding: .5vh 0 ;
    position: fixed;
    text-align: center;
    width: 100vw;
}
header img, header span {
    vertical-align: middle;
}
header img {
    height: 5vh;
}
header span {
    font-size: 2vh;
    font-weight: bold;
    margin-left: 3vw;
}
main, .comments {
    background-color: snow;
    border: 1px solid snow; /*anti collapse*/
    box-shadow: 0 0 10px 15px lightgray;
    font-family: sans-serif;
    
    padding: 2vh 2vw;
	text-align: justify;
    text-indent: 30px;
}
main {
	margin: 10vh 5vw 2vh 5vw;
}

section.collapsing {
    max-height: 100%;
    overflow: hidden;
    transition: max-height .3s;
}
section.collapsing h2 {
    cursor: pointer;
    margin-left: 20px;
    position: relative;
}
section.collapsing h2::before {
    content: attr(data-before);
    left: -15px;
    position: absolute;
    top: -3px;
}
code {
    display: block;
    text-indent: 0;
}
footer {
    padding: 1vh 2vw;
}
.fractal {
    border: 1px solid blue;
    float: right;
    margin: 1vh 1vw;
}
.comments {
	margin: 0 5vw 2vh 5vw;
}
.comments textarea {
	box-sizing: border-box;
	float: right;
	height: 7.3vw;
	width: 50%;
}
.comments span {
	display: inline-block;
	font-size: 1.5vw;
	margin-bottom: .4em ;
	text-indent: 0;
	width: 20vw;
}
.comments input {
	font-size: 1.5vw;
}

.comment {
	box-shadow: 0 0 3px 3px #ccc inset;
	font-size: 1.5vw;
	margin-top: 1em;
	padding: 1ch 1em;
}