@charset "utf-8";
.accordion-box {
    margin: 10px 0;
    padding: 0;
}
.accordion-box label {
    display: block;
    font-weight: bold;
    cursor :pointer;
    margin-top: 10px;
    padding:4px;
    background-color:paleturquoise;
}
.accordion-box input {
    display: none; 
}
.accordion-box div {
    height: 0;
    overflow-y: hidden;
    transition: 0.5s;	/* display speed */
    opacity: 0;
}
.accordion-box input:checked + label + div {
    height: auto;
    opacity: 1;
	border: 1px solid gray;
	padding: 10px 5px;
}
.accordion-box label::before {
    content: "＋";
    padding-right: 8px;
}
.accordion-box input:checked + label::before {
    content: "－";
}