dragster.style.css

/*
 * Dragster - drag'n'drop library v1.3.6
 * https://github.com/sunpietro/dragster
 *
 * Copyright 2015-2016 Piotr Nalepa
 * http://blog.piotrnalepa.pl
 *
 * Released under the MIT license
 * https://github.com/sunpietro/dragster/blob/master/LICENSE
 *
 * Date: 2016-12-12T19:00Z
 */
* {
    box-sizing: border-box;
}

body {
    width: 100%;
    max-width: 60rem;
    margin: auto;
    font: 100%/1.4 Arial, sans-serif;
    text-align: center;
}

[draggable] {
  -moz-user-select: none;
  -khtml-user-select: none;
  -webkit-user-select: none;
  -ms-user-select: none;
      user-select: none;
  -khtml-user-drag: element;
  -webkit-user-drag: element;
}

.regions {
    display: flex;
    flex-direction: row;
    flex-wrap: wrap;
    justify-content: space-between;
}

.dragster-region {
    flex: 1 1 30%;
    outline: 1px solid blue;
    padding: 1rem;
    vertical-align: top;
    min-height: 3rem;
    transition: height .3s cubic-bezier(.4, 0, .2, 1);
    margin: 1rem;
}

.dragster-region + .dragster-region {
    outline: 1px solid red;
}

.dragster-draggable {
    position: relative;
    z-index: 1;
    cursor: pointer;
}

.dragster-draggable + .dragster-draggable {
    margin-top: 1rem;
}

.dragster-draggable.is-dragging {
    cursor: move;
}

.dragster-temp {
    pointer-events: none;
    z-index: 10;
    top: 0;
    left: 0;
    cursor: move;
    opacity: 1;
    box-shadow: 0 0 5px 0 rgba(0,0,0,.5);
    transition:
        opacity .3s cubic-bezier(.4, 0, .2, 1),
        box-shadow .3s cubic-bezier(.4, 0, .2, 1);
}

.dragster-block {
    background: #eee;
    padding: .5rem;
    opacity: 1;
}

.dragster-block svg {
    width: 100%;
}

.dragster-draggable.is-dragging > * {
    opacity: 0.5;
}

.dragster-drop-placeholder {
    height: 2rem;
    border: 1px dashed #000;
}

.dragster-block + .dragster-drop-placeholder,
.dragster-drop-placeholder + .dragster-block {
    margin-top: .5rem;
}

.dragster-is-hidden,
.dragster-temp.dragster-is-hidden {
    opacity: 0;
    box-shadow: none;
}

.dragster-draggable.dragster-replacable {
    outline: 2px solid #b30;
}