@import url("https://fonts.googleapis.com/css?family=Lato");
* {
  box-sizing: border-box;
  transition: all 0.5s ease;
}
body {
  align-items: center;
  background-color: #111;
  display: flex;
  font-family: 'Lato', sans-serif;
  height: 100vh;
  justify-content: center;
  overflow: hidden;
  margin: 0;
  padding: 0;
  width: 100vw;
}
:root {
  --animation-speed: 2;
  --base-size: 2.5vh;
  --inner-primary-color: #fff;
  --inner-secondary-color: #000;
  --inner-length: 7;
  --outer-primary-color: #fff;
  --outer-secondary-color: #000;
  --outer-length: 7;
}
.circle {
  border-radius: 50%;
  height: 100%;
  position: absolute;
  width: 100%;
}
.inner {
  height: calc(var(--inner-length) * var(--base-size));
  left: 50%;
  margin-left: calc((var(--inner-length) * var(--base-size)) / -2);
  position: absolute;
  width: calc(var(--inner-length) * var(--base-size));
}
.inner > .circle:nth-child(1) {
  background-color: var(--inner-secondary-color);
  -webkit-transform: scale(0.142857142857143);
          transform: scale(0.142857142857143);
  -webkit-transform-origin: center calc((var(--inner-length) * var(--base-size)) - (var(--base-size) * 0.25));
          transform-origin: center calc((var(--inner-length) * var(--base-size)) - (var(--base-size) * 0.25));
  z-index: 14;
}
.inner > .circle:nth-child(2) {
  background-color: var(--inner-primary-color);
  -webkit-transform: scale(0.285714285714286);
          transform: scale(0.285714285714286);
  -webkit-transform-origin: bottom center;
          transform-origin: bottom center;
  z-index: 13;
}
.inner > .circle:nth-child(3) {
  background-color: var(--inner-secondary-color);
  -webkit-transform: scale(0.428571428571429);
          transform: scale(0.428571428571429);
  -webkit-transform-origin: bottom center;
          transform-origin: bottom center;
  z-index: 12;
}
.inner > .circle:nth-child(4) {
  background-color: var(--inner-primary-color);
  -webkit-transform: scale(0.571428571428571);
          transform: scale(0.571428571428571);
  -webkit-transform-origin: bottom center;
          transform-origin: bottom center;
  z-index: 11;
}
.inner > .circle:nth-child(5) {
  background-color: var(--inner-secondary-color);
  -webkit-transform: scale(0.714285714285714);
          transform: scale(0.714285714285714);
  -webkit-transform-origin: bottom center;
          transform-origin: bottom center;
  z-index: 10;
}
.inner > .circle:nth-child(6) {
  background-color: var(--inner-primary-color);
  -webkit-transform: scale(0.857142857142857);
          transform: scale(0.857142857142857);
  -webkit-transform-origin: bottom center;
          transform-origin: bottom center;
  z-index: 9;
}
.inner > .circle:nth-child(7) {
  background-color: var(--inner-secondary-color);
  -webkit-transform: scale(1);
          transform: scale(1);
  -webkit-transform-origin: bottom center;
          transform-origin: bottom center;
  z-index: 8;
}
.outer {
  -webkit-animation: rotate calc(var(--animation-speed) * 1s) infinite linear;
          animation: rotate calc(var(--animation-speed) * 1s) infinite linear;
  position: relative;
  height: calc((var(--inner-length) + var(--outer-length)) * var(--base-size));
  width: calc((var(--inner-length) + var(--outer-length)) * var(--base-size));
}
.outer > .circle:nth-child(1) {
  background-color: var(--outer-primary-color);
  -webkit-transform: scale(0.571428571428571);
          transform: scale(0.571428571428571);
  -webkit-transform-origin: top center;
          transform-origin: top center;
  z-index: 7;
}
.outer > .circle:nth-child(2) {
  background-color: var(--outer-secondary-color);
  -webkit-transform: scale(0.642857142857143);
          transform: scale(0.642857142857143);
  -webkit-transform-origin: top center;
          transform-origin: top center;
  z-index: 6;
}
.outer > .circle:nth-child(3) {
  background-color: var(--outer-primary-color);
  -webkit-transform: scale(0.714285714285714);
          transform: scale(0.714285714285714);
  -webkit-transform-origin: top center;
          transform-origin: top center;
  z-index: 5;
}
.outer > .circle:nth-child(4) {
  background-color: var(--outer-secondary-color);
  -webkit-transform: scale(0.785714285714286);
          transform: scale(0.785714285714286);
  -webkit-transform-origin: top center;
          transform-origin: top center;
  z-index: 4;
}
.outer > .circle:nth-child(5) {
  background-color: var(--outer-primary-color);
  -webkit-transform: scale(0.857142857142857);
          transform: scale(0.857142857142857);
  -webkit-transform-origin: top center;
          transform-origin: top center;
  z-index: 3;
}
.outer > .circle:nth-child(6) {
  background-color: var(--outer-secondary-color);
  -webkit-transform: scale(0.928571428571429);
          transform: scale(0.928571428571429);
  -webkit-transform-origin: top center;
          transform-origin: top center;
  z-index: 2;
}
.outer > .circle:nth-child(7) {
  background-color: var(--outer-primary-color);
  -webkit-transform: scale(1);
          transform: scale(1);
  -webkit-transform-origin: var(--base-size) center;
          transform-origin: var(--base-size) center;
  z-index: 1;
}
.options {
  position: absolute;
  top: 0;
  left: 0;
  z-index: 1;
}
.options:checked {
  -webkit-transform: translateX(130px);
          transform: translateX(130px);
}
.options:checked ~ .options-menu {
  -webkit-transform: translateX(0%);
          transform: translateX(0%);
}
.options:checked ~ .options-label {
  -webkit-transform: translateX(130px);
          transform: translateX(130px);
}
.options:checked ~ .options-label span {
  opacity: 0;
}
.options:checked ~ .options-label:after {
  -webkit-transform: translate(-50%, -50%) rotate(45deg);
          transform: translate(-50%, -50%) rotate(45deg);
}
.options:checked ~ .options-label:before {
  -webkit-transform: translate(-50%, -50%) rotate(-45deg);
          transform: translate(-50%, -50%) rotate(-45deg);
}
[type=checkbox] {
  visibility: hidden;
}
.options-label {
  position: absolute;
  cursor: pointer;
  top: 0;
  left: 0;
  height: 50px;
  width: 50px;
}
.options-label span {
  width: 65%;
  height: 15%;
  background-color: #fff;
  display: block;
  position: absolute;
  top: 50%;
  left: 50%;
  -webkit-transform: translate(-50%, -50%);
          transform: translate(-50%, -50%);
}
.options-label:before,
.options-label:after {
  content: '';
  width: 65%;
  height: 15%;
  background-color: #fff;
  position: absolute;
  top: 50%;
  left: 50%;
  -webkit-transform: translate(-50%, -50%);
          transform: translate(-50%, -50%);
}
.options-label:before {
  -webkit-transform: translate(-50%, -215%);
          transform: translate(-50%, -215%);
}
.options-label:after {
  -webkit-transform: translate(-50%, 115%);
          transform: translate(-50%, 115%);
}
.options-menu {
  color: #fff;
  position: absolute;
  top: 0;
  left: 0;
  -webkit-transform: translateX(-100%);
          transform: translateX(-100%);
  padding: 10px;
  width: 130px;
}
.options-menu__group {
  margin-bottom: 10px;
}
.options-menu [type=range] {
  width: 100px;
}
.options-menu label {
  display: block;
}
@-webkit-keyframes rotate {
  from {
    -webkit-transform: rotate(0deg);
            transform: rotate(0deg);
  }
  to {
    -webkit-transform: rotate(360deg);
            transform: rotate(360deg);
  }
}
@keyframes rotate {
  from {
    -webkit-transform: rotate(0deg);
            transform: rotate(0deg);
  }
  to {
    -webkit-transform: rotate(360deg);
            transform: rotate(360deg);
  }
}