:root {
	--default-font-size: 16px;
	--default-spacing: 10px;
}
body {
	line-height: 1.5;
}

p, h1, h2, h3, h4, h5, textarea, input, fieldset {
	margin: var(--default-spacing);
}

legend {
	padding: 5px;
	font-size: 18px;
	font-weight: bold;
}

textarea, input {
	padding: var(--default-spacing);
	font-size: var(--default-font-size);
}

.flex {
	display: flex;
	flex-wrap: wrap;
	align-items: center;
}

header {
	grid-area: header;
	border: solid 1px black;
}

article {
	grid-area: content;
	border: solid 1px black;
}

aside {
	grid-area: sidebar;
	border: solid 1px black;
}

.details {
	grid-area: details;
	border: solid 1px black;
}

footer {
	grid-area: footer;
	border: solid 1px black;
}