style.css

body {
	background-image: linear-gradient(to bottom right ,#66ff33, #d9ffcc, #66ff33);
}

html{
	font-family: consolas;
	height: 100%;
}

.title_block{
	padding: 3px;
	margin: 0px auto 10px auto;
	background-color: #4d9900DD;
	width: 70%;
	text-align:center;
	text-transform: uppercase;
	font-size: 20px;
	color: #e6ff99;
	border-radius: 30px;
}

.title_block > h1 {
	margin: 0px;
}

.content {
	padding: 2px;
	margin: 0px auto 10px auto;
	/*background-color: #ffff00EE;*/
	background-image: linear-gradient(to bottom right, #999900, #e6e600);
	padding: 10px;
	width: 72%;
	color: White;
	border-radius: 15px;
}

.content > h3 {
	margin: 0px;
	font-weight: normal;
	text-align: center;
	text-transform: uppercase;
}

.calculator-inputs {
	width: 50%;
	height: 50%;
	margin: 3px auto 3px auto;
	padding: 5px;
	text-align: left;
	align: center;
}

.calculator-outputs {
	width: 60%;
	margin: 3px auto 3px auto;
	padding: 5px;
	text-align: center;
	font-size: 30px;
	font-weight: bold;
}

.calculator-inputs > input {
	border-radius: 30px;
	padding: 10px 10px;
	border: none;
	background-color: #f9ffe6;
	width: 100%;
	color: green;
	font-size: 16px;
	margin: 0px 0px 20px 0px;
}

.calculator-inputs > button {
	border-radius: 30px;
	padding: 10px 10px;
	border: none;
	color: white;
	background-color: #4d9900;
	font-weight: bold;
	font-size: 16px;
	width: 110px;
	margin: 0px auto;
}

hr {
	border-color: white;
}

@media screen and (max-width: 600px) {
	.content {
		width: 95%;
		margin: 0px;
	}
}