.posta {
	max-width: 320px;
}
.posta input[type="text"] {
	font: inherit;
	box-sizing: border-box;
	height: 40px;
	width: 100%;
	margin: 0 0 10px 0;
	background-color: rgba(0,0,0,.5);
	color: white;
	border: none;
	padding: 4px 8px;
	border-radius: 4px;
}
.posta textarea {
	font: inherit;
	vertical-align: top;
	margin: 0 0 10px 0;
	box-sizing: border-box;
	width: 100%;
	background-color: rgba(0,0,0,.5);
	color: white;
	border: none;
	resize: none;
	padding: 4px 8px;
	border-radius: 4px;
}
.posta button {
	font: inherit;
	width: 120px;
	height: 40px;
	line-height: 40px;
	cursor: pointer;
	margin: 0;
	text-align: center;
	box-sizing: border-box;
	border: none;
	background-color: rgba(0,0,0,.5);
	color: white;
	border-radius: 4px;
	transition: .3s;
}
.posta button:hover {
	background-color: rgba(0,0,0,1);
}