* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  -ms-user-select: none;
  -moz-user-select: none;
  -webkit-user-select: none;
  user-select: none;
}

body, html {
  height: 100%;
}

html, input, button {
  font: 14px/1.5 -apple-system, BlinkMacSystemFont, 'Segoe UI', Ubuntu, Roboto, Helvetica, Arial, sans-serif;
}

textarea {
  -ms-user-select: text;
  -moz-user-select: text;
  -webkit-user-select: text;
  user-select: text;
}

button {
    padding: .3rem 1rem;
    background: #ccc;
    border: 0;
    transition: background-color .2s;
  }
  button:hover, button:focus {
    background: #bbb;
    transition: none;
    outline: none;
  }
  button:active {
    background: #aaa;
}

a, img {
  -webkit-user-drag: none;
  user-drag: none;
}

.hide {
  opacity: 0;
  pointer-events: none;
}

#grid {
    position: absolute;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    overflow: hidden;
  }
  #grid ol {
    display: grid;
    position: relative;
    list-style: none;
  }
  #grid.arrow ol {
    cursor: crosshair;
  }
  #grid.pan ol {
    cursor: -webkit-grab;
  }
  #grid.pan:active ol {
    cursor: -webkit-grabbing;
  }
  #grid ul {
    position: absolute;
    list-style: none;
    left: 0;
    top: 0;
    height: 0;
    width: 0;
}

.grid-cell {
    position: relative;
    display: grid;
    border: 2px dashed #ccc;
    border-top: none;
    border-left: none;
    overflow: hidden;
    white-space: nowrap;
    transition: background-color .2s;
  }
  .grid-cell.selected {
    background: #eee;
    outline: none;
  }
  .grid-cell .grabber {
    position: absolute;
    left: 2px;
    top: 2px;
    width: 12px;
    height: 12px;
    cursor: move;
    opacity: 0;
    pointer-events: none;
  }
  .grid-cell .loop {
    position: absolute;
    right: 2px;
    top: 2px;
    width: 26px;
    height: 26px;
    cursor: pointer;
    opacity: 0;
    pointer-events: none;
  }
  .pan .grid-cell:hover .grabber, .arrow .grid-cell:hover .loop {
    opacity: 1;
    pointer-events: all;
  }
  .grid-cell .value {
    margin: auto;
  }
  .grid-cell.edit .value {
    opacity: 0;
    pointer-events: none;
  }
  .grid-cell .edit {
    display: flex;
    align-items: center;
    position: absolute;
    width: 100%;
    height: 100%;
  }
  .grid-cell .edit input {
    border: none;
    outline: none;
    width: 100%;
    text-align: center;
    background: transparent;
    font: 1rem/1.5 Consolas, monospace;
}

.grid-arrow {
    position: absolute;
    pointer-events: none;
  }
  .grid-arrow svg {
    display: block;
  }
  .grid-arrow svg .mouse {
    transition: stroke .1s;
  }
  .arrow .grid-arrow:not(.phantom) svg .mouse {
    pointer-events: all;
  }
  .arrow .grid-arrow svg .mouse:hover {
    stroke: rgba(204, 204, 204, .6);
  }
  .grid-arrow.selected svg .mouse.mouse {
    stroke: rgb(204, 204, 204);
  }
  .grid-arrow .value {
    position: absolute;
    white-space: nowrap;
  }
  .grid-arrow .value.inside {
    padding: 0 5px;
    background: white;
}

.toolbox {
    position: absolute;
    left: 50%;
    padding: 0 .5em;
    background: rgba(221, 221, 221, .7);
    box-shadow: 0 5px 10px rgba(0, 0, 0, .5);
    transform: translateX(-50%);
  }
  .toolbox ul {
    line-height: 0;
    display: flex;
    flex-wrap: nowrap;
    align-items: stretch;
    list-style: none;
  }
  .toolbox li.separator {
    margin: 0 .5em;
    width: 2px;
    background: #aaa;
    text-indent: -9999em;
  }
  .toolbox li.button a {
    cursor: default;
    transition: background-color .2s;
  }
  .toolbox li.button a:hover, .toolbox li.button a:focus {
    background: #ccc;
    transition: none;
  }
  .toolbox li.button a:active {
    background: #aaa;
  }
  .toolbox li.button.checked a {
    background: #bbb;
  }
  .toolbox li.button.disabled a {
    opacity: .4;
    pointer-events: none;
  }
  .toolbox li.button a {
    display: block;
    padding: .5em;
  }
  .toolbox li.button img {
    display: block;
    background-size: 100%;
    background-position: center;
    width: 24px;
    height: 24px;
    transition: background-image .2s;
}

#toolbox {
  bottom: 2em;
}

#properties {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    pointer-events: none;
  }
  #properties.edit {
    pointer-events: all;
  }
  #properties .edit {
    border-radius: 5px;
    position: absolute;
    width: 130px;
    padding: .3em 1em;
    background: rgba(57, 57, 57, .9);
    box-shadow: 0 5px 10px rgba(0, 0, 0, .5);
    opacity: 0;
    transform: scale(.7) translate(0, 100%);
    transition: opacity .1s, transform .1s;
  }
  #properties .edit::after {
    content: '';
    display: block;
    position: absolute;
    left: calc(50% - 10px);
    bottom: -10px;
    border-left: 10px solid transparent;
    border-right: 10px solid transparent;
    border-top: 10px solid rgb(77, 77, 77);
  }
  #properties.edit .edit {
    opacity: 1;
    transform: scale(1);
  }
  #properties .edit input {
    width: 100%;
    border: none;
    outline: none;
    background: transparent;
    color: white;
    font: 1rem/1.5 Consolas, monospace;
    text-align: center;
  }
  #properties .toolbox {
    top: calc(-16px - 2em);
    background: rgba(0, 0, 0, .7);
    transition: top .2s;
    pointer-events: all;
  }
  #properties.show .toolbox {
    top: 1em;
  }
  #properties li.button a:hover, #properties li.button a:focus {
    background: #0050C0;
  }
  #properties li.button a:active {
    background: #0030A0;
  }
  #properties li.button.checked a {
    background: #2272E2;
  }
  #properties li.button.remove a:hover, #properties li.button.remove a:focus {
    background: #E81123;
  }
  #properties li.button.remove a:active {
    background: #C60001;
  }
  #properties li.button img {
    width: 16px;
    height: 16px;
    filter: invert(100%);
  }
  #properties li.separator {
    background: rgba(255, 255, 255, .4);
}

#modal-overlay {
    display: flex;
    justify-content: center;
    align-items: center;
    position: absolute;
    left: 0;
    right: 0;
    top: 0;
    bottom: 0;
    background: rgba(255, 255, 255, 0);
    visibility: hidden;
    transition: background-color .2s;
  }
  #modal-overlay.show {
    visibility: visible;
    background: rgba(255, 255, 255, .5);
  }
  #modal-overlay .modal-box {
    background: rgba(221, 221, 221, .7);
    box-shadow: 0 5px 10px rgba(0, 0, 0, .5);
    padding: 1rem;
    opacity: 0;
    transform: scale(.9) translateY(5rem);
    transition: transform .2s, opacity .2s;
  }
  #modal-overlay.show .modal-box {
    opacity: 1;
    transform: none;
}

.code-box textarea {
    display: block;
    padding: .5rem;
    border: none;
    resize: none;
    width: 62vw;
    height: 50vh;
    font: 1rem/1.5 Consolas, monospace;
    background: #393939;
    color: white;
    white-space: pre;
  }
  .code-box textarea:focus {
    outline: 2px solid #4494F4;
  }
  .code-box .buttons {
    display: flex;
    justify-content: flex-end;
    list-style: none;
    margin-top: 1rem;
  }
  .code-box .buttons li:not(:first-child) {
    margin-left: .5rem;
  }
  .code-box .buttons li.separator {
    flex: 1;
}