html * {
	box-sizing: border-box;
}
:root {
	--primary-color: #000000;
	--secondary-color: #eeddaa;
}

body {
	font-family: system-ui, sans-serif;
	font-size: 100%;
	line-height: 135%; 
	background-color: var(--primary-color);
	color: var(--secondary-color);
}

a {color: var(--secondary-color);}

header {
	min-height: 30vh;
	background-color: #88888833;
	display: flex;
	flex-direction: column;
	justify-content: center;
	align-items: center;
}

h1 {
	line-height: 1.2em;
	/* outline: 1px solid red;  for debugging */
	text-align: center;
}

h2 {
    margin-right: 10px;
}

.grid-layout {
    display: grid;
    grid-template-columns: 1fr 3fr; 
    grid-template-areas: 
        "header header"
        "sidebar main"
        "footer footer";
    gap: 15px;
    padding: 15px;
}
.block-header { 
    grid-area: header; 
    background-color: rgba(255,255,255,0.1); 
    padding: 10px; 
}

.block-sidebar { 
    grid-area: sidebar; 
    background-color: rgba(255,255,255,0.15); 
    padding: 10px; 
}

.block-footer { 
    grid-area: footer; 
    background-color: rgba(255,255,255,0.1); 
    padding: 10px; 
}

.block-main { 
    grid-area: main; 
    background-color: rgba(255,255,255,0.2); 
    padding: 15px; 
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
}

.flex-child {
    background-color: var(--secondary-color);
    color: var(--primary-color);
    padding: 15px;
    border-radius: 4px;
    flex: 1 1 150px;
}