*{
	box-sizing: border-box;
	padding: 0;
	margin: 0;
}

html, body{
	height: 100%;
}

body{
	width: 100%;
	height: 100%;
	padding: 0;
	margin: 0;
	background: linear-gradient(to left top, #0045d6, #00a9f6);
	font-family: 'Poppins', sans-serif;

}

header{
	width: 100%;
	height: 13vh;
	display: flex;
	justify-content: center;
	align-items: center;
	background-color: #fff;
}

.title{
	color: #0045d6;
}

.content{
	height: 60vh;
	width: 100%;
	display: flex;
	flex-direction: column;
	align-items: center;
	justify-content: center;
	color: #fff;
	font-size: 3rem;
	text-transform: uppercase;
}

.btn{
	padding: 0.8rem 1.7rem;
	background-color: #fff;
	border: none;
	outline: none;
	cursor: pointer;
	border-radius: 4px;
	font-family: 'Poppins', sans-serif;
	font-size: 1.2rem;
	font-weight: 700;
}

.start{
	color: #1f3;
}
.stop{
	color: #E00;
}

#continue, .stop, #start{
	display: none;
}


#seconds{
	width: 250px;
	background: none;
	outline: none;
	border: none;
	border-bottom: 4px solid #fff;
	padding: 1rem;
	font-size: 2rem;
	color: white;
}

#seconds::placeholder{
	color: #ddd;
}