/*---------------------------------------------*/
/*SKELETON*/
/*the position, size, and orientation of all elements without style or spaces*/
body, body * {
	display: flex;
	/*by default all elements are verticals*/
	flex-direction: column;
}
html {
	scroll-behavior: smooth;
	/*default font-size for rem*/
	font-size: var(--base-font-size);
}
body {
	background-color: var(--color-back-base);
}
nav {
	flex-direction: row;
	/*we have to set the height to use the height % for childs elements*/
	height: var(--nav-height);
	background-color: var(--color-back-base);
	z-index: 10;
	border-bottom: 1px solid var(--color-lines-4);
}
nav iframe {
	width: 100%;
}
.container_main {
	flex-direction: row;
}
.container_main > * {
	margin: 0px auto;
}
aside.aside_left {
	top: calc(var(--nav-height) + 1px);
	height: calc(100vh - var(--nav-height) - 1px);
	background-color: var(--color-back-base);
}
main {
	background-color: var(--color-back-base);
	min-height: calc(100vh - 1px - var(--nav-height) - var(--footer-height));
}
aside.aside_right {
	background-color: var(--color-back-base);
}
footer.page_footer {
	background-color: var(--color-back-dark);
}


/*---------------------------------------------*/
/*DESIGN KEYWORDS*/
/* contains elements oriented vertically (default) or horizontally*/
.vertical {
	flex-direction: column;
}
/* horizontal is only in web version, it becomes vertical in mobile design*/
.horizontal {
	flex-direction: row;
}
/* self position of elements to the left, the right, or the center of their container*/
.right {
	margin-right: 0px;
	margin-left: auto;
	text-align: right;
}
.left > * {
	margin-left: 0px;
}
.center {
	margin-right: auto;
	margin-left: auto;
	text-align: center;
}
.sticky {
	position: -webkit-sticky; /*safari*/
	position: sticky;
	top: 0;
}
/*dropdown element*/
/*
	.dropdown
		.drop .drop_title
		.drop_items
			.drop
			.drop
*/
/*
.dropdown {
	flex-direction: column;
	position: relative;
	margin-right: 20px;
}
.dropdown:after {
	content: "▼";
	position: absolute;
	left: 100%;
	top: 50%;
	-ms-transform: translateY(-50%); old IE
	transform: translateY(-50%);
}
.dropdown .drop_title {
}
.dropdown .drop_items {
	position: absolute;
	top: 100%;
	left: 0px;
	height: auto;
}
.dropdown .drop {
	margin: var(--gap-unit);
}
*/