div p {
	position: relative;
}
input,
input + i {
	-webkit-transition: all .3s;
	transition: all .3s;
}
input {
   	appearance: none;
	position: relative;
	vertical-align: middle;
	display: block;
    height: 2em;
    width: 90%;
	padding: 5px;
	margin: 0 16px;
	border: 1px solid #999;
	border-radius: 0.2em;
	z-index: 1;
}
input:focus {
	border: 1px solid rgba(0,152,209,1);
}
input:focus::-moz-placeholder {
	opacity: 0;
}
input:focus::-webkit-input-placeholder {
	opacity: 0;
}
p input + i {
	position: absolute;
	top: 0.2em;
	left: 1.3em;
	padding: 0.6em 0.7em 0.45em;
	border-radius: 0.2em;
	background: rgba(0,152,209,1);
	color: #fff;
    font-size: 80%;
	line-height: 1;
	z-index: 0;
}
input:focus + i {
	top: 3.25em;
}
input + i::before {
	content: '例) ';
}
input:focus +i::after {
	content: '';
	position: absolute;
	top: -37%;
	left: 50%;
	margin-left: -6px;
	border: 6px solid transparent;
	border-bottom-color: rgba(0,152,209,1);
}