.banner-slider-inner {
    max-width: 800px;
    max-height: 400px;
    margin: auto;
}

.material {
    margin-top: 20px;
}

.material-title {
    text-align: center;
    margin-top:20px;
    margin-bottom: 20px;
    font-size:1.5em;
}

.material-title a {
    text-decoration: none;
    color: #990000;
}

.material-title a.selected {
    text-decoration: none;
    color: red;
}

.material-img-expand {
    width:20px;
    height:20px;
    background-image: url(../content/expand_x20.png);
    border: none;
}

.material-img-collapse {
    width:20px;
    height:20px;
    background-image: url(../content/collapse_x20.png);
    border: none;
}

.material-img-ft {
    height:20px;
    width:20px;
}

img:hover {
    box-shadow: 1px 1px 2px hsl(0, 0%, 70%);
}

.material-description {
    margin:auto;
    width:50%;
    text-align: justify;
}

.material-header {
    text-align: center;
    margin: auto;
}

.material-separator {
    width: 33%;
    height:10px;
    border-top:2px red solid;
    margin: auto;
}