@keyframes hue {
  0% {
    filter: hue-rotate(0deg);
  }

  100% {
    filter: hue-rotate(360deg);
  }
}

body {
	margin: 2em auto;
}

.lain {
	background: url('logo.png') no-repeat;
	background-size: contain;
	background-position: center;
	margin: 0 auto;
	min-height: 20em;
}

form {
	display: flex;
	flex-direction: column;
	width: 50%;
	max-width: 400px;
	margin: 0 auto;
	padding-bottom: 70px;
}

form h3,h4,h5 {
	text-align: center;
	margin: 5px;
}

form input {
	margin: 5px;
	border-radius: 0.4rem;
	background: white;
	outline: 0;
	border: solid #ccc 1px;
	padding: 0.4em;
}

form input#button {
	background-color: #FF20AA50;
	animation: hue 10s 1s infinite;
}

footer {
	clear: both;
	min-height: 4rem;
	padding: 1rem 0;
	width: 100%;
	text-align: center;
	background-color: rgb(253, 251, 255);
	border-top: 1px solid #ddd;
	overflow: hidden;
}