button.accordion {
    background-color: #eee;
    color: #444;
    cursor: pointer;
    width: 120px;
    border: none;
    text-align: left;
    outline: none;
    font-size: 15px;
    transition: 0.4s;
    top:0px;
    height: 30px;
    text-align: center;
}

button.accordion-sub {
    background-color: #eee;
    color: #444;
    cursor: pointer;
    padding: 18px;
    width: 350px;
    border: none;
    text-align: left;
    outline: none;
    font-size: 15px;
    transition: 0.4s;
}

button.accordion.active, button.accordion:hover {
    background-color: #ddd;
}

button.accordion-sub.active, button.accordion-sub:hover {
    background-color: #ddd;
}

div.panel {
    padding: 18px 0px;
    display: none;
    background-color: white;
}

div.panel.show {
    display: block;
}