button.accordion {
font:14px/1.5 Lato, "Helvetica Neue", Helvetica, Arial, sans-serif;
cursor: pointer;
padding: 0px;
border: none;
text-align: left;
outline: none;
font-size: 100%;
transition: 0.3s;
background-color: #f8f8f8;
}
button.accordion.active, button.accordion:hover {
background-color: #f8f8f8;
}
button.accordion:after {
content: " [+] ";
font-size: 90%;
color:#777;
float: left;
margin-left: 1px;
}

button.accordion.active:after {
content: " [\2212] ";
}
div.panel {
padding: 0 20px;
margin-top: 5px;
display: none;
background-color: white;
font-size: 100%;
}
div.panel.show {
display: block !important;
}