* {
	margin:0;
	padding:0;
	box-sizing:border-box;
}
body {
	font-family:Arial,helvetica,sans-serif;
	background:#f6f5f7;
	display:flex;
	flex-direction:column;
	justify-content:center;
	align-items:center;
	height:100vh;
}
h1 {
	font-weight:bold;
	margin:0;
}
p {
	/*默认为16px*/
	font-size:14px;
	font-weight:100;
	line-height:20px;
	letter-spacing:0.5px;
	margin:20px 0 30px;
}
span {
	font-size:12px;
}
a {
	color:#333;
	font-size:18px;
	text-decoration:none;
	margin:30px 0px;
}
.fabfa-qq {
	background:url(../img/qq.png) no-repeat center;
	width:auto;
	height:auto;
	background-size:cover;
	display:inline-block;
}
/*container*/
.container {
	background:#fff;
	border-radius:10px;
	/*      水平阴影   垂直阴影    模糊距离    阴影颜色*/
	box-shadow:0 14px 28px rgba(0,0,0,0.25),0 10px 10px rgba(0,0,0,0.22);
	position:relative;
	overflow:hidden;
	width:768px;
	max-width:100%;
	min-height:480px;
}
.form-container form {
	background-color:#fff;
	display:flex;
	flex-direction:column;
	padding:0 30px;
	height:100%;
	justify-content:center;
	align-items:center;
	text-align:center;
}
.social-container {
	margin:10px 0;
}
.social-container a {
	border:1px solid #ddd;
	border-radius:50%;
	display:inline-flex;
	justify-content:center;
	align-items:center;
	margin:0px 5px;
	height:40px;
	width:40px;
}
.form-container input {
	background:#eee;
	border:none;
	padding:12px 15px;
	margin:5px 0;
	width:100%;
}
button {
	border-radius:20px;
	border:1px solid #ff4b2b;
	background:#FF4B2B;
	color:#fff;
	font-size:12px;
	font-weight:bold;
	padding:12px 45px;
	letter-spacing:1px;
	transition:transform 80ms ease-in;
}
button:active {
	transform:scale(0.95);
}
button:focus {
	outline:none;
}
button.ghost {
	background:transparent;
	border-color:#fff;
}
.form-container {
	position:absolute;
	top:0;
	height:100%;
	transition:all 0.6s ease-out;
}
/*sign in*/
.sign-in-container {
	left:0;
	width:50%;
	z-index:2;
}
/*sign up*/
.sign-up-container {
	left:0;
	width:50%;
	opacity:0;
	z-index:1;
}
/*overlay-container*/
.overlay-container {
	position:absolute;
	top:0;
	left:50%;
	width:50%;
	height:100%;
	overflow:hidden;
	transition:transform 0.6s ease-in-out;
	z-index:100;
}
.overlay {
	background:#ff416c;
	background:linear-gradient(to right,#ff4b2b,#ff416c) no-repeat 0 0/cover;
	color:#fff;
	height:100%;
	width:200%;
	position:relative;
	left:-100%;
	transform:translateX(0);
	transition:transform 0.6s ease-in-out;
}
.overlay-panel {
	position:absolute;
	top:0;
	display:flex;
	flex-direction:column;
	justify-content:center;
	align-items:center;
	height:100%;
	width:50%;
	padding:0 40px;
	text-align:center;
	transform:translateX(0);
	transition:transform 0.6s ease-in-out;
}
.overlay-right {
	right:0;
	transform:translateX(0);
}
.overlay-left {
	transform:translateX(-20%);
}
/*animation*/
/*move signIn to right*/
.container.right-panel-active .sign-in-container {
	transform:translateX(100%);
}
/*move overlay to left*/
.container.right-panel-active .overlay-container {
	transform:translateX(-100%);
}
/*bring sign up over sign in*/
.container.right-panel-active .sign-up-container {
	opacity:1;
	z-index:5;
	transform:translateX(100%);
}
/*move overlay back to right*/
.container.right-panel-active .overlay {
	transform:translateX(50%);
}
.container.right-panel-active .overlay-left {
	transform:translateX(0);
}
.container.right-panel-active .overlay-right {
	transform:translateX(20%);
}