* { box-sizing: border-box; }

body {
    margin: 0;
    padding: 0;
    overflow-x: hidden;
    font-family: 'Avenir Next', Avenir, sans-serif;
    font-weight: 500;
    font-size: 20px;
    color: #555;
    background-color: #1B1B1B;
}

canvas {
  cursor: move;
  display: block;
  position: absolute;
  max-width: 100%;
  left: 0;
  top: 0;
}

.is-cub-hovered,
.is-cub-hovered canvas {
  cursor: -webkit-grab;
  cursor: grab;
}

.is-cub-dragging,
.is-cub-dragging canvas {
  cursor: -webkit-grabbing;
  cursor: grabbing;
}

.instruction {
  padding: 0 10px;
  text-align: center;
  position: absolute;
  width: 100%;
  padding-bottom: 40px;
}

.button {
  font-family: 'Avenir Next', Avenir, sans-serif;
  font-weight: 500;
  font-size: 20px;
  padding: 5px 15px;
  margin: 10px;
  background: #BBB;
  color: white;
  border-radius: 5px;
  border: none;
  cursor: pointer;
}

.button:hover {
  background: #09F;
}

.top-bar {
  position: absolute;
  left: 0;
  top: 0;
}

.level-select-button {
  position: relative;
  z-index: 2; /* above canvas */
}

.next-level-button {
  position: absolute;
  left: 50%;
  -webkit-transform: translateX(-110px) scale(0.5);
  transform: translateX(-110px) scale(0.5);
  opacity: 0;
  background: #09F;
  width: 200px;
  height: 80px;
  pointer-events: none;
  -webkit-transition: -webkit-transform 0.2s, opacity 0.2s;
  transition: transform 0.2s, opacity 0.2s;
}

.next-level-button:hover {
  background: #2BF;
}

.next-level-button.is-open {
  display: inline-block;
  pointer-events: auto;
  -webkit-transform: translateX(-110px) scale(1);
  transform: translate(-110px) scale(1);
  opacity: 1;
}

/* ---- level list ---- */

.level-list {
  position: absolute;
  background: #EEE;
  width: 100%;
  min-height: 100%;
  left: 0;
  top: 0;
  margin: 0;
  list-style: none;
  padding: 10px;
  z-index: 3; /* above canvas, level select button */
  left: -100%;
  transition: left 0.2s;
}

.level-list.is-open {
  left: 0;
}

.level-list__item {
  display: inline-block;
  background: #DDD;
  margin: 5px;
  padding: 10px;
  width: 80px;
  height: 80px;
  text-align: center;
  border-radius: 10px;
  position: relative;
}

.level-list__item:hover {
  color: #09F;
  cursor: pointer;
  background: white;
}

.level-list__item.is-playing {
  background: #09F;
  color: white;
}

.level-list__item__number {
  display: block;
  font-size: 30px;
  line-height: 35px;
}

.level-list__item__blurb {
  display: block;
  font-size: 16px;
}

.level-list__item__check {
  position: absolute;
  right: -10px;
  top: -10px;
  width: 30px;
  line-height: 30px;
  background: #555;
  border-radius: 15px;
  color: white;
  display: none;
}

.level-list__item.did-complete .level-list__item__check {
  display: block;
}

/* ---- level pres ---- */

.levels { display: none; }