main.css

:root {
	--light-yellow: #fdfcdc;
	--light-orange: #fed9b7;
	--header-height: 80px;
}

* {
	box-sizing: border-box;
}

body {
	margin: 0;
	font: 20px/1.5 sans-serif;
}

.container {
	max-width: 1200px;
	padding: 0 15px;
	margin: 0 auto;
}

a {
	color: inherit;
}

.site-header {
	display: flex;
	align-items: center;
	justify-content: center;
	font-size: 2rem;
	height: var(--header-height);
	background: var(--light-orange);
}

.hero {
	display: flex;
	flex-direction: column;
	align-items: center;
	justify-content: center;
	height: var(--unit, 100vh);
	padding: 15px;
	text-align: center;
	background-image: url(https://assets.codepen.io/162656/man-walking.jpg);
}

.hero h1,
.hero button {
	background: var(--light-yellow);
}

.hero h1 {
	font-size: 3rem;
	line-height: 1;
	padding: 10px;
	margin: 0 0 20px;
}

.hero button {
	font-size: 100%;
	color: inherit;
	cursor: pointer;
	width: 70px;
	aspect-ratio: 2;
	border: none;
	border-radius: 5px;
	transition: background 0.25s;
}

.hero button:hover,
.hero button.active {
	background: var(--light-orange);
}

.hero a {
	display: inline-block;
	margin-top: 20px;
}

.text {
	padding: 50px 0;
}

.toolbar {
	position: fixed;
	bottom: 5vh;
	right: 10px;
	display: flex;
	flex-direction: column;
	gap: 15px;

	a {
		display: flex;
		text-decoration: none;
	}
}

/*STICKY*/
.sticky {
	.hero {
		height: var(--unit, calc(100vh - var(--header-height)));
	}
}