body, html {
    font-family: Arial, sans-serif;
    line-height: 1.6;
    padding: 0;
    margin: 0;
    background: #f4f4f4;
}

.container {
    width: 80%;
    margin: 20px auto;
    background: #fff;
    padding: 20px;
    box-shadow: 0 5px 10px rgba(0,0,0,0.1);
}

h1 {
    color: #333;
}

ul {
    list-style: none;
    padding: 0;
}

.expandable {
    padding: 10px;
    background: #eee;
    cursor: pointer;
    border-bottom: 2px solid #ddd;
	white-space: pre-line;
}

.expandable:hover {
    background: #ddd;
}

.description {
    display: none;
    padding: 5px;
    margin-top: 5px;
    background: #ccc;
}

.plus {
    float: right;
    font-weight: bold;
}

.clearfix::after {
    content: "";
    clear: both;
    display: table;
}