html, body {
    margin: 5px;
    padding: 0;
}

button {
    background: blue;
    color: rgb(61, 201, 177);
    padding: 1rem;
}

#app {
	display: flex;
	flex-direction: column; justify-content: center; align-items: center;
	width: 100vw; height: 100vh;
	font-weight: 20; font-size: 1.5rem;
	color: hsl(0, 0%, 100%);
	background: hsl(240, 100%, 67%);
}