* {
	box-sizing: border-box;
}

body {
	background-color: #f2f2f2;
	font-family: "Helvetica", sans-serif;
	background: url("https://media2.giphy.com/media/v1.Y2lkPTc5MGI3NjExNmUwc3R3dXB0N3A1ZWFnamo0cjZoamlzemVwZzQ1b3NtN3V5bTVmaCZlcD12MV9pbnRlcm5hbF9naWZfYnlfaWQmY3Q9Zw/9rvBJe0O7gJAwmEZLm/giphy.gif");
	background-repeat: no-repeat;
	background-size: contain;
	background-position: center;
	background-color: #15191f;
}

.container {
	margin: 100px auto;
	padding: 20px;
	background-color: white;
	max-width: 600px;
	box-shadow: 0 0 10px rgba(0, 0, 0, 0.2);
	border-radius: 10px;
}

h1 {
	margin-top: 0;
	text-align: center;
}

input {
	margin: 10px 0;
	padding: 10px;
	border: 1px solid #ccc;
	border-radius: 4px;
	width: 100%;
}

button {
	margin: 10px 0;
	background-color: #4caf50;
	color: white;
	padding: 10px;
	border: none;
	cursor: pointer;
	width: 100%;
	font-size: 18px;
	text-transform: uppercase;
	transition: background-color .2s ease;
}

button:hover {
	background-color: #45a049;
}

#total {
	margin-top: 10px;
	font-size: 24px;
	font-weight: bold;
}