html,* { box-sizing: border-box; }
body { background-color: #fafafa; line-height:1.6;}
.lead { font-size: 1.5rem; font-weight: 300; }
.container { margin: 150px auto; max-width: 960px; }
ul.check-tree, ul.check-tree * {
    list-style-type: none;
    margin: 0;
    padding: 0 0 5px 0;
}
ul.check-tree img.arrow {
    padding: 2px 0 0 0;
    border: 0;
    width: 20px;
    color: rgb(151, 151, 151);
}
ul.check-tree li {
    padding: 5px 0 0 0;
    line-height: 18px;
}
ul.check-tree li ul {
    padding: 0 0 0 30px;
    margin: 0;
}
ul.check-tree label {
    cursor: pointer;
    font-weight: bold;
    padding: 2px 0;
    color: rgb(151, 151, 151);

}
ul.check-tree label.selectable {
    cursor: pointer;
    font-weight: bold;
    padding: 2px 0;
    color: rgb(0, 0, 0);
}
ul.check-tree label.hover {
    color: rgb(104, 104, 104);
}
ul.check-tree label.selectable.hover {
    color: rgb(0, 99, 25);
}
ul {
    margin-top: 5px;
    margin-bottom: 5px;
}
ul.check-tree li .arrow {
    width: 20px;
    height: 18px;
    padding: 0;
    margin: 0;
    cursor: pointer;
    float: left;
    background: transparent no-repeat 0 0px;
    opacity: 50%;
}
ul.check-tree li .collapsed {
    background-image: url(images/right.svg);
}
ul.check-tree li .expanded {
    background-image: url(images/down.svg);
}

ul.check-tree li .checkbox {
    width: 20px;
    height: 18px;
    padding: 0;
    margin: 0;
    cursor: pointer;
    float: left;
    background: url(images/square.svg) no-repeat 0 0px;
    opacity: 50%;
}
ul.check-tree li .checkbox.selectable  {
    width: 20px;
    height: 18px;
    padding: 0;
    margin: 0;
    cursor: pointer;
    float: left;
    background: url(images/square.svg) no-repeat 0 0px;
    opacity: 100%;
}
ul.check-tree li .checked {
    background-image: url(images/check.svg) !important;
}
ul.check-tree li .half_checked {
    background-image: url(images/square-minus.svg);
}