@keyframes darken {
	from {}
	to {background-color: gray; color: white;}
}
.main_header {
	font-size: 50px;
	text-align: center;
	margin-top: 30px;
}
.buy_item {
	display: block;
	margin: 15px auto;
	width: 300px;
	height: 300px;
	border: 1px solid black;
	border-radius: 15px;
	background-color: white;
}
.buy_item:hover {
	animation-name: darken;
	animation-duration: 200ms;
	animation-timing-function: linear;
	animation-fill-mode: forwards;
	cursor: pointer;
}
.buy_title {
	text-align: center;
	margin-top: 10px;
}
.buy_subtitle {
	text-align: center;
	margin-top: 5px;
}
.buy_price {
	text-align: center;
	margin-top: 20px;
}
.buy_price_specific {
	color: red;
	text-decoration: line-through;
}
.buy_price_speficic_sale {
	color: black;
}
.buy_sample {
	width: 50px;
	height: 50px;
}