details-style.css

:root {
	--gutter-horizontal: 10vw;
	--gutter-vertical: 10vh;
}
img {
	max-width: 100%;
}
details+details {
	margin-top: 1em;
}
details.modal summary {
	background: #000000;
	border: 2px solid black;
	cursor: pointer;
	display: inline-block;
	padding: .25em .5em;
}
details.modal summary::-webkit-details-marker {
	display: none;
}
details.modal summary::before {
	content: " ";
	display: inline-block;
	padding-right: .25em;
}
details[open].modal summary::before {
	content: "✖️";
}
details[open].modal {
	overflow: auto;
	padding: 1em;
	position: fixed;
	z-index: 10;
}
details[open].modal, details[open].modal::after {
	bottom: 10vh;
	bottom: var(--gutter-vertical);
	left: 10vw;
	left: var(--gutter-horizontal);
	right: 10vw;
	right: var(--gutter-horizontal);
	top: 10vh;
	top: var(--gutter-vertical);
}
details[open].modal::before, details[open].modal::after {
	content: "";
	position: fixed;
	z-index: -1;
}
details[open].modal::before {
	background: rgba(0, 0, 0, .75);
	bottom: 0;
	left: 0;
	right: 0;
	top: 0;
}
details[open].modal::after {
	background: rgba(0, 0, 0, 0.9);
}
.embed-container {
	position: relative;
	padding-bottom: 56.25%;
	height: 0;
	overflow: hidden;
	max-width: 100%;
}
.embed-container iframe, .embed-container object, .embed-container embed {
	position: absolute;
	top: 0;
	left: 0;
	width: 100%;
	height: 100%;
}
.loader {
	border: 2px solid #FFF;
	width: 48px;
	height: 48px;
	background: #FF3D00;
	border-radius: 50%;
	display: inline-block;
	position: relative;
	box-sizing: border-box;
	animation: rotation 2s linear infinite;
}
.loader::after {
	content: '';
	box-sizing: border-box;
	position: absolute;
	left: 50%;
	top: 50%;
	border: 24px solid;
	border-color: transparent #FFF;
	border-radius: 50%;
	transform: translate(-50%, -50%);
}
@keyframes rotation {
	0% {
		transform: rotate(0deg);
	}
	100% {
		transform: rotate(360deg);
	}
}