.css3gradient{width:100%;height:100px;
 background-color:#000000;
 filter:progid:DXImageTransform.Microsoft.gradient(GradientType=0,startColorstr=#000000, endColorstr=#5c5c5c);
 background-image:-moz-linear-gradient(top, #000000 0%, #5c5c5c 100%);
 background-image:-webkit-linear-gradient(top, #000000 0%, #5c5c5c 100%);
 background-image:-ms-linear-gradient(top, #000000 0%, #5c5c5c 100%);
 background-image:linear-gradient(top, #000000 0%, #5c5c5c 100%);
 background-image:-o-linear-gradient(top, #000000 0%, #5c5c5c 100%);
 background-image:-webkit-gradient(linear, right top, right bottom, color-stop(0%,#000000), color-stop(100%,#5c5c5c));}

 /* Style the buttons that are used to open and close the accordion panel */
button.accordion {
    background-color: #eee;
    color: #444;
    cursor: pointer;
    padding: 18px;
    width: 100%;
    text-align: left;
    border: none;
    outline: none;
    transition: 0.4s;
}

/* Add a background color to the button if it is clicked on (add the .active class with JS), and when you move the mouse over it (hover) */
button.accordion.active, button.accordion:hover {
    background-color: #ddd;
}

/* Style the accordion panel. Note: hidden by default */
div.panel {
    padding: 0 18px;
    background-color: #ddd;
    display: none;
}

/* The "show" class is added to the accordion panel when the user clicks on one of the buttons. This will show the panel content */
div.panel.show {
    display: block;
}

ul {
    margin:0;
    padding: 15;
}