.tree, .tree ul {
    margin:0;
    padding:0;
    list-style:none
}
.tree ul {
    margin-left:1em;
    position:relative
}

.tree ul ul {
    margin-left:.5em
}
.tree ul:before {
    content:"";
    display:block;
    width:0;
    position:absolute;
    top:0;
    bottom:0;
    left:0;
    border-left:1px solid
}
.tree li {
    margin:0;
    padding:0 1em;
    line-height:2em;
    color:#369;
    font-weight:700;
    position:relative
}
.tree ul li:before {
    content:"";
    display:block;
    width:20px;
    height:0;
    border-top:1px solid;
    margin-top:-1px;
    position:absolute;
    top:1em;
    left:0
}

.tree ul li:last-child:before {
    background:#e5ebf2;
    height:auto;
    top:1em;
    bottom:0
}

.indicator {
    margin-right:5px;
    margin-left:5px;
}
.tree li a {
    text-decoration: none;
    color:#369;
}
.tree li button, .tree li button:active, .tree li button:focus {
    text-decoration: none;
    color: #369;
    border: none;
    background: transparent;
    margin: 0px 0px 0px 0px;
    padding: 0px 0px 0px 0px;
    outline: 0;
}

.cool_pulse_effect {
    box-shadow: 0px 0px 0px 5px #FC5185;
    -webkit-animation: flash linear 1s forwards;
    animation: flash linear 1s forwards;
}

.cool_pulse_effect2 {
    box-shadow: 0px 0px 0px 2px #FC5185;
    -webkit-animation: flash linear 1s infinite;
    animation: flash linear 1s infinite;
}

@-webkit-keyframes flash {
    0% { opacity: 1; }
    50% { opacity: .1; }
    100% { opacity: 1;
        box-shadow: none;}
}
@keyframes flash {
    0% { opacity: 1; }
    50% { opacity: .1; }
    100% { opacity: 1;
        box-shadow: none;}
}

.droppable_target {
    background-color: yellow;
}