.select-box {
	background: #E6E6E6;
	position: relative;
	display: flex;
	flex-wrap: wrap;
	justify-content: space-around;
	align-items: stretch;
	width: 80%;
	height: auto;
	top: -55vw;
	margin-left: 10%;
	margin-right: 1%;
	padding-top: 2%;
	padding-left: 5%;
	padding-right: 5%;
	padding-bottom: 2%;
	text-align-last: center;
}
.parent, .children, .search, .reset, .submit {
    background: #ffffff;
    margin: 5px;
}
/* 追加: input要素に対して背景色を白に明示的に設定 */
input.search {
    background: #ffffff !important;
}
.parent, .children, .search {
    width: 250px;
    height: 50px;
}
.reset, .submit {
    width: 100px;
    height: 50px;
}
.submit {
    color: #ffffff;
    background: #666666;
}
.hidden {
    display: none;
        }
.highlight {
    background-color: #EFFF00;
        }