* {
	box-sizing: border-box;
}

:root {
	--bg-color: #ffffff;
	--text-color: #000000;
}

.dark-mode {
	--bg-color: #121212;
	--text-color: #ffffff;
}

@font-face {
	font-family: OpenSan;
	src: url("Open_Sans/OpenSans-Light.ttf");
}

body {
	font-family: OpenSan, sans-serif;
	font-size: 16px;
	background-color: var(--bg-color);
	color: var(--text-color);
	transition: background 0.5s, color 0.5s;
}

#container {
	text-align: center;
}

#container h1 {
	font-size: 2em;
}

#container h3 {
	margin: 0;
	font-size: 1.4em;
}

#container h5 {
	margin: 30px 0 0 0;
	font-size: 1em;
}

.clock {
	font-size: 3em;
	/* letter-spacing: 0; */
}

.blink {
	opacity: 0;
	transition: opacity 0.3s;
}

#child1,
#child2 {
	margin: 0 5%;
}

.btn {
	display: block;
	padding: 10px;
	background-color: rgb(20, 94, 169);
	color: whitesmoke;
	text-decoration: none;
	width: 250px;
	margin: 30px auto 0 auto;
}

p {
	text-align: center;
}

footer {
	margin-top: 60px;
}

footer p {
	font-size: 0.85em;
	color: #999;
}

@media screen and (min-width: 600px) {
	.clock {
		font-size: 8em;
	}
}