未経験アラサーおっさんが

[CSS]

/*---------------------------------
トップに戻るボタン
-----------------------------------*/
#toTop{
	position:fixed;
	right:15px;
	bottom:15px;
	font-size:14px;
	background-image:linear-gradient(#0765b1, #06599b);
	background-color:#0765b1;
	border-radius:5px;
	box-shadow:0 0 4px 0 rgba(0,0,0,0.2);
	color:#ffffff;
	padding:10px 15px 10px 25px;
	text-decoration:none;
	display:none;
}
#toTop::before{
	content:'';
	position:absolute;
	top:50%;
	left:8px;
	-webkit-transform:translateY(-50%);
	transform: translateY(-50%);
	border:6px solid transparent;
	border-bottom:12px solid #ffffff;
	border-top:0;
}
#toTop.show{
	display:block;
}