uye.css

@import url('https://fonts.googleapis.com/css?family=Poppins:300,400,500');
body {
	margin: 0;
	padding: 0;
	display: flex;
	justify-content: center;
	align-items: center;
	height: 100vh;
	background: url(booksuye.jpg);
	font-family: 'Poppins', sans-serif;
}
.giris {
	text-align: center;
	width: 500px;
	box-sizing: border-box;
	padding: 40px;
	background-color: #808080;
}
.giris h2 {
	margin: 0 0 20px;
	padding: 0;
	font-size: 30px;
	text-transform: uppercase;
}
.giris .pc {
	position: relative;
	width: 100%;
	margin-bottom: 25px;
}
.giris .pc input {
	height: 50px;
	width: 100px;
	padding: 0 20px;
	box-sizing: border-box;
	font-size: 18px;
	outline: none;
	border: 1px solid #000;
}
.giris .pc span {
	position: absolute;
	top: 12px;
	left: 20px;
	padding: 0;
	transition: 0.5s;
	pointer-events: none;
	background: #fff;
	text-transform: uppercase;
}
.giris .pc input:focus ~ span,
.giris .pc input:valid ~ span {
	top: -12px;
	left: 12px;
	font-size: 12px;
	padding: 2px 4px;
	border: 1px solid #000;
	background: #ff0;
}

.giris .pc input[type="submit"] {
	background: #ff0;
	border: none;
	box-shadow: none;
	text-transform: uppercase;
	cursor: pointer;
	font-weight: 600;
}
.giris .pc input[type="submit"]:hover {
	background: #fc7100;
	
}
.giris a {
	color: #262626;
	text-decoration: none;
	display: block;
	text-align: left;
	color: #666;
}
.giris a span {
	color: #262626;
	font-weight: 600;
}