.topic{
	display:block;
	position:relative;
	float:left;
	width: 47.5%;
	margin: 25px 2.5% 0 0;
	background-color:#fff;
	color: #505060;
	padding:12px 15px;
	border-radius: 0px 0px 10px 0px;
	border-left: 2px solid var(--cor-secundaria);
	box-shadow: -1px 3px 20px 0px rgb(82, 90, 101, 0.1);
	z-index:1;
	transition: 0.4s;
}
.topic:hover{
	color:white;
}
.topic.one-row{
	width: 97.5%;
}
.topic.two-row{
	width: 47.5%;
}
.topic.three-row{
	width: 30.5%;
}
.topic.four-row{
	width: 22.5%;
}

.topic::before{
	width:0%;
	top: 0;
	left:0;
	bottom:0;
	right:0;
	content:'';
	position: absolute;
	background:var(--cor-principal);
	border-radius: 0px 0px 10px 0px;
	z-index:-1;
	color:white;
	transition: 0.4s;
	background: rgb(13,13,201);
	background: linear-gradient(270deg, var(--cor-principal) 35%, var(--cor-secundaria) 100%);  
}
.topic:hover::before{
	width:100%;
	color:white;
}