body {
  --background: #202020;
  --accent: #FFCA45;
  --blue: #47d5ff;
  --size: calc(85vw / 35);
  --neg_size: calc(-85vw / 35);
  --margin: 2px;

  font-family: "Google Sans", "Helvetica Neue", helvetica, arial, sans-serif;
  margin: 0;
  padding: 14px;
  background: var(--background);
  color: white;
  overflow-x: hidden;
}

main, header, footer {
  max-width: 800px;
  margin: 0 auto;
  position: relative;
  text-align: center;
}

footer {
  margin-top: 44px;
}

* { box-sizing: border-box; }
[hidden] { display: none !important}

[disabled] {
  opacity: 0.3;
  pointer-events: none;
}

h1 {
  font-size: 40px;
  margin-top: 0;
}

a:link, a:visited {
  color: white;
}

a:hover {
  color: var(--accent);
}

.horizontal {
  display: flex;
  flex-direction: row;
  justify-content: space-between;
  align-items: center;
}

.grow {
  flex-grow: 1;
}

.pixels-wrapper {
  position: relative;
  margin: 20px 0;
  min-height: calc(2 * 6 * var(--size));
}

.container {
  text-align: left;
  line-height: 0;
  letter-spacing: 0px;
  -webkit-user-select: none;
  -moz-user-select: none;
  -ms-user-select: none;
  user-select: none;
  white-space: nowrap;
  position: relative;
}

svg {
  position: absolute;
  top: 0;
  left: 0;
  z-index: 2;
  pointer-events: none;
}

.row.hidden {
  opacity: 0.3;
  pointer-events: none;
}
.row.hidden .pixel.on {
  background: #333333 !important;
}

.pixel {
  background: #333333;
  font-size: 0;
  margin: 0;
  padding: 0;
  border: none;
  box-shadow: none;
  height: calc(2 * var(--size));
  width: var(--size);
  margin: var(--margin);
  max-width: 21px;
  max-height: 40px;
}

.pixel:hover {
  background: #5d5d5d !important;
}

.pixel.on {
  background: var(--accent) !important;
}

.container .row .pixel:nth-child(4n+5), .container .row .pixel:first-of-type {
  background: #404040;
}

.playing .pixel.active {
  transform: scale(1.5);
  z-index:20;
}

.playing .pixel.bar {
  background: #5d5d5d !important;
}

rect {
  fill: #34d0ff;
  fill-opacity: 0.7;
  margin: var(--margin);
  max-width: 20px;
  max-height: 40px;
  transform: translate(0,0);
}

rect.active {
  transform: translate(calc(0.2 * var(--neg_size)), calc(0.5 * var(--neg_size)));
  fill-opacity: 1;
}

.controls {
  display: flex;
  flex-direction: row;
  justify-content: space-between;
  align-items: center;
  width: 100%;
}

button, input, label {
  vertical-align: middle;
}

label {
  margin-left: 8px;
  min-width: 100px;
}

.button, input[type=number] {
  -webkit-appearance: none;
  color: white;
  outline: none;
  position: relative;
  cursor: pointer;
  padding: 8px 16px;
  margin: 8px;
  border: 2px solid var(--accent);
  background-color: #4b4b4b00;
  transition: background-color 0.2s;
  font-size: 16px;
  font-weight: bold;
  line-height: 22px;
  text-align: center;
  text-transform: uppercase;
  min-width: 100px;
  transition: background-color 0.2s linear, color 0.2s linear, letter-spacing 0.2s linear;
}
input[type=number] {
  border-top: none;
  border-left: none;
  border-right: none;
  min-width: 80px;
  width: 80px;
}

input[type=number]:hover {
  color: var(--accent);
}

.button.blue {
  border-color: var(--blue);
}

.button:hover {
  background: var(--accent);
  color: var(--background);
  border-color: var(--accent);
}

.button.blue:hover {
  background: var(--blue);
  border-color: var(--blue);
}

.button.action {
  background: var(--blue);
  border-color: var(--blue);
  color: black;
  min-width: 250px;
}
.button.action:hover {
  letter-spacing: 2px;
}
input[type=range] {
  -webkit-appearance: none;
  -moz-appearance: none;
  appearance: none;
  position: relative;
  background: transparent;
}

input[type=range]::-webkit-slider-runnable-track {
  background: var(--blue);
  height: 5px;
  border: none;
  box-shadow: none;
}
input[type=range]::-moz-range-track {
  background: var(--blue);
  height: 5px;
  border: none;
  box-shadow: none;
}
input[type=range]::-ms-track {
  background: var(--blue);
  height: 5px;
  border: none;
  box-shadow: none;
}
input[type=range]::-webkit-slider-thumb {
  background: var(--blue);
  border: none;
  box-shadow: none;
  -webkit-appearance: none;
  height: 16px;
  width: 16px;
  border-radius: 50%;
  margin-top: -5px;
  cursor: pointer;
}
input[type=range]::-moz-range-thumb {
  background: var(--blue);
  border: none;
  box-shadow: none;
  -webkit-appearance: none;
  height: 16px;
  width: 16px;
  border-radius: 50%;
  margin-top: -5px;
  cursor: pointer;
}
input[type=range]::-ms-thumb {
  background: var(--blue);
  border: none;
  box-shadow: none;
  -webkit-appearance: none;
  height: 16px;
  width: 16px;
  border-radius: 50%;
  margin-top: -5px;
  cursor: pointer;
}
input[type=range]:hover::-webkit-slider-thumb {
  transform: scale(1.5);
}
input[type=range]:hover::-moz-range-thumb {
  transform: scale(1.5);
}
input[type=range]:hover::-ms-thumb {
  transform: scale(1.5);
}

@media screen and (max-width: 700px) {
  .controls {
    width: 100%;
    flex-direction: column;
  }
  .horizontal {
    width: 100%;
    justify-content: space-between;
  }
  .pixels-wrapper {
    margin: 0;
  }
  .button, input, label {
    font-size: 14px;
    min-width: 140px;
  }
  #btnDrumify {
    width: 100%;
  }
  body {
    --size: calc(88vw / 35);
    --neg-size: calc(-88vw / 35);
    --margin: 1px;
  }
}

@media screen and (max-width: 450px) {
  body {
    --size: calc(82vw / 35);
    --neg-size: calc(-82vw / 35);
    --margin: 1px;
  }
  h1 {
    font-size: 30px;
  }
  .button {
    margin: 4px;
  }
}