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              <main>
  <div class="device">
    <header>
      <div class="header-bar"></div>
      <div class="header-title">
        <h1>Calendar</h1>
      </div>
      <div class="header-weekdays">
        <span>sun</span>
        <span>mon</span>
        <span>tue</span>
        <span>wed</span>
        <span>thu</span>
        <span>fri</span>
        <span>sat</span>
      </div>
    </header>
    <section>
        <h2 class="month">December</h2>
        <form>
          <input type="radio" name="calendar-label-bg" class="calendar-label-bg" id="vacation" />
          <input type="radio" name="calendar-label-bg" class="calendar-label-bg" id="walk" />
          <input type="radio" name="calendar-label-bg" class="calendar-label-bg" id="fishing" />
          <input type="radio" name="calendar-label-bg" class="calendar-label-bg" id="weekend" />
          <input type="radio" name="calendar-label-bg" id="new" class="calendar-label-bg">
          <div class="calendar">
            <input type="checkbox" name="" id="" class="day previous-month" />
            <input type="checkbox" name="" id="" class="day current-month" />
            <input type="checkbox" name="" id="" class="day current-month" />
            <input type="checkbox" name="" id="" class="day current-month" />
            <input type="checkbox" name="" id="" class="day current-month" />
            <input type="checkbox" name="" id="" class="day current-month" />
            <input type="checkbox" name="" id="" class="day current-month" />
            <input type="checkbox" name="" id="" class="day current-month" />
            <input type="checkbox" name="" id="" class="day current-month" />
            <input type="checkbox" name="" id="" class="day current-month" />
            <input type="checkbox" name="" id="" class="day current-month" />
            <input type="checkbox" name="" id="" class="day current-month" />
            <input type="checkbox" name="" id="" class="day current-month" />
            <input type="checkbox" name="" id="" class="day current-month" />
            <input type="checkbox" name="" id="" class="day current-month" />
            <input type="checkbox" name="" id="" class="day current-month" />
            <input type="checkbox" name="" id="" class="day current-month" />
            <input type="checkbox" name="" id="" class="day current-month" />
            <input type="checkbox" name="" id="" class="day current-month" />
            <input type="checkbox" name="" id="" class="day current-month" />
            <input type="checkbox" name="" id="" class="day current-month" />
            <input type="checkbox" name="" id="" class="day current-month" />
            <input type="checkbox" name="" id="" class="day current-month" />
            <input type="checkbox" name="" id="" class="day current-month" />
            <input type="checkbox" name="" id="" class="day current-month" />
            <input type="checkbox" name="" id="" class="day current-month" />
            <input type="checkbox" name="" id="" class="day current-month" />
            <input type="checkbox" name="" id="" class="day current-month" />
            <input type="checkbox" name="" id="" class="day current-month" />
            <input type="checkbox" name="" id="" class="day current-month" />
            <input type="checkbox" name="" id="" class="day current-month" />
            <input type="checkbox" name="" id="" class="day current-month" />
            <input type="checkbox" name="" id="" class="day next-month" />
            <input type="checkbox" name="" id="" class="day next-month" />
            <input type="checkbox" name="" id="" class="day next-month" />
            <div class="calendar-labels">
              <label for="vacation"><span>vacation</span></label>
              <label for="walk"><span>walk</span></label>
              <label for="fishing"><span>fishing</span></label>
              <label for="weekend"><span>weekend</span></label>
              <label for="new" class="full"><input type="text" placeholder="Add new task"></label>
              <label class="reset">
                <input type="reset" value="Reset"/>
              </label>
            </div>
          </div>
        </form>
        <h2 class="month">January</h2>
        <div class="calendar inactive">
          <input type="checkbox" name="" id="" class="day next-month">
          <input type="checkbox" name="" id="" class="day next-month">
          <input type="checkbox" name="" id="" class="day next-month">
          <input type="checkbox" name="" id="" class="day next-month">
          <input type="checkbox" name="" id="" class="day next-month">
          <input type="checkbox" name="" id="" class="day next-month">
          <input type="checkbox" name="" id="" class="day next-month">
          <input type="checkbox" name="" id="" class="day next-month">
          <input type="checkbox" name="" id="" class="day next-month">
          <input type="checkbox" name="" id="" class="day next-month">
          <input type="checkbox" name="" id="" class="day next-month">
          <input type="checkbox" name="" id="" class="day next-month">
          <input type="checkbox" name="" id="" class="day next-month">
          <input type="checkbox" name="" id="" class="day next-month">
          <input type="checkbox" name="" id="" class="day next-month">
          <input type="checkbox" name="" id="" class="day next-month">
          <input type="checkbox" name="" id="" class="day next-month">
          <input type="checkbox" name="" id="" class="day next-month">
          <input type="checkbox" name="" id="" class="day next-month">
          <input type="checkbox" name="" id="" class="day next-month">
          <input type="checkbox" name="" id="" class="day next-month">
          <input type="checkbox" name="" id="" class="day next-month">
          <input type="checkbox" name="" id="" class="day next-month">
          <input type="checkbox" name="" id="" class="day next-month">
          <input type="checkbox" name="" id="" class="day next-month">
          <input type="checkbox" name="" id="" class="day next-month">
          <input type="checkbox" name="" id="" class="day next-month">
          <input type="checkbox" name="" id="" class="day next-month">
          <input type="checkbox" name="" id="" class="day next-month">
          <input type="checkbox" name="" id="" class="day next-month">
        </div>
    </section>
  </div>
</main>
<aside>
  <div class="meta">    
    <h1>CSS-only Calendar App Concept</h1>
    <p>
      Dribbble Rework<br>
      Original shot by <a href="https://dribbble.com/shots/1841134-Gif-for-Calendar">Sergey Valiukh</a>
    </p>
    <p>
      Click two dates and the labels to see the effect.<br>
      Works <strike>best</strike> only in Chrome and Safari.
    </p>
  </div>
</aside>
            
          
!
            
              @import "compass/css3";

@import url(https://fonts.googleapis.com/css?family=Lato:300,400,700);

$device-width: 264px * 1.5;
$device-height: 544px * 1.5;


$color-bg: #4075b7;
$color-app: white;
$color-header: #58b2a4;
$color-device: #dcdfe6;
$color-device-border: white;
$color-device-part: #a1a5b3;

$color-text-dark: #333;
$color-text-light: white;

$color-noncurrent-month: rgba($color-text-dark, 0.3);
$color-check: rgba(white, 0.7);

$color-vacation: #d3738b;
$color-fishing: #8f658a;
$color-walk: #7186db;
$color-weekend: #f7c187;
$color-new: $color-header;

$colors: (
  vacation: $color-vacation,
  fishing: $color-fishing,
  walk: $color-walk,
  weekend: $color-weekend,
  new: $color-new
);

$day-height: 3rem;

$day-labels: (vacation, fishing, walk, weekend, new);

$animation-easing: cubic-bezier(0.77, 0, 0.175, 1);

$label-speed: 1s;
$day-speed: 0.6s;
$bg-speed: 1s;

$header-height: $day-height * 2;

@mixin range($min, $max) {
  &:nth-child(n + #{$min}):nth-child(-n + #{$max}) {
    @content;
  }
}

@mixin clearfix {
  &:before, &:after {
      content: " ";
      display: table;
  }
  &:after { clear: both; }
}

@function day-span($days) {
  @return percentage($days / 7);
}

* {
  box-sizing: border-box;
  position: relative;
}

html, body {
  font-family: Lato, sans-serif;
  font-weight: 300;
  line-height: 1;
  background-color: $color-bg;
  width: 100%;
  height: 100%;
  counter-reset: previous-month 29 current-month next-month;
  margin: 0;
}

aside, main {
  width: 50%;
  height: $device-height;
  float: left;
  padding: 0 2rem;
  margin: 2rem 0;
}

header {
  color: $color-text-light;
}

.header-bar {
  height: 1rem;
}

.header-title {
  padding: 1rem;

  h1 {
    font-weight: 300;
    font-size: 1rem;
    margin: 0;
    padding: 0;
    text-align: center;
    text-transform: uppercase;
    letter-spacing: 3px;
  }
}

.header-weekdays {
  height: 2rem;
  span {
    font-size: 0.8rem;
    display: block;
    float: left;
    width: percentage(1/7);
    padding: 0.5rem 0;
    text-align: center;
    text-transform: uppercase;
  }
}

.calendar {
  @include clearfix();

  &.inactive {
    pointer-events: none;
  }
}

form {
  @include clearfix();
  background: rgba($color-header, 0.9);
}

.month {
  padding: 1rem;
  font-size: 1rem;
  color: $color-text-dark;
  margin: 0;
}

.day {
  float: left;
  width: percentage(1/7);
  text-align: center;
  padding: 1rem 0;
  margin: 0;
  font-size: 1rem;
  line-height: 1;
  -webkit-appearance: none;
  appearance: none;
  outline: none;
  transition-property: background, color;
  transition-duration: 0.3s;
  transition-timing-function: ease-in-out;
  transition-delay: 0s;

  .device:not(:hover) & { transition-duration: 0; }
  
  &:after {
    display: block;
    transition-property: transform, opacity;
    transition-duration: $day-speed;
    transition-timing-function: $animation-easing;
  }

  &.current-month:after {
    content: counter(current-month);
    counter-increment: current-month;
  }

  &.next-month:after {
    content: counter(next-month);
    counter-increment: next-month;
  }

  &.previous-month:after {
    content: counter(previous-month);
    counter-increment: previous-month;
  }

  &.previous-month, &.next-month {
    color: $color-noncurrent-month;
  }

  &:last-of-type:before {
    content: '';
    display: block;
    position: absolute;
    top: 0;
    left: 100%;
    width: 700%;
    height: 100%;
    background: $color-app;
  }

  &:checked {
    &, & ~ .day {
      color: $color-text-light;
    }

    & ~ .day {
      background-color: transparent;
    }
  }

  &:hover,
  &:checked,
  & ~ .day:hover,
  & ~ .day:checked {
      background-color: rgba(0, 0, 0, 0.1);
      color: $color-text-light;
  }

  &, &:checked ~ .day:checked ~ .day,
  &:checked ~ .day:hover ~ .day,
  &:checked:hover ~ .day {
    background-color: $color-app;
    color: $color-text-dark;

    &.next-month { color: $color-noncurrent-month; }
  }
  
  @for $day from 1 through 7 {
    &:nth-child(7n + #{$day}):after {
      transition-delay: (1/7) * ($day - 1) * $day-speed;
      animation-delay: (1/7) * ($day - 1) * $day-speed;
    }
  }
}

.calendar-label-bg {
  display: block;
  position: absolute;
  outline: none;
  top: 0;
  left: 0;
  width: 100%;
  height: 5 * $day-height;
  margin: 0;
  -webkit-appearance: none;
  appearance: none;
  transform: translateX(-100%);
  animation: bg-inactive $bg-speed $animation-easing;
  
  &:checked {
    animation: bg-active $bg-speed $animation-easing forwards;

    ~ .calendar .day:checked {
      &:after, & ~ .day:after {        
        animation-name: day-active;
        animation-duration: $day-speed;
        animation-timing-function: $animation-easing;
      }

      & ~ .day:checked ~ .day:after {
        animation: none;
      }
    }
  }
}

@each $label in $day-labels {
  $label-color: map-get($colors, $label);
  
  ##{$label} { background-color: $label-color; }
  
  ##{$label}:checked {
    
    ~ .calendar {
      @for $weekday from 1 through 7 {
        .day {
          &:nth-child(7n + #{$weekday}) {
            z-index: (8 - $weekday) * 10;
          }
        }
      }
      
      .calendar-labels label[for=#{$label}] {

        &:not(.full):before {
          visibility: visible;
          animation: check-active 0.1s 0.2s ease-out both;
        }

        &.full {
          input { font-weight: 700; }

          &:before {          
            color: $color-text-light;
            border-color: $color-text-light;
          }
        }

        > span {
          transform: translateX(2rem);
        }
      }
    }
  }
}

.calendar-labels {
  display: none;
  width: 100%;
  position: absolute;
  top: 0;
  z-index: 100;
  pointer-events: none;

  transition: all 0s ease-in-out;
  transition-delay: $label-speed;
  transform: translateY(0);
  opacity: 0;

  .device:hover & { display: block; }

  &:before {
    content: '';
    display: block;
    position: absolute;
    bottom: 100%;
    height: 5 * $day-height;
    width: 100%;
    pointer-events: auto;
  }
  
  > label {
    display: block;
    float: left;
    width: day-span(4);
    font-size: 1rem;
    padding: 1rem;
    color: $color-text-light;
    font-weight: 700;
    white-space: nowrap;
    overflow: hidden;

    &:before {
      display: block;
      position: absolute;
      left: 0.75rem;
      height: 1rem;
      visibility: hidden;
    }

    &.full {
      width: 100%;
      font-weight: 700;

      &:before {
        transition-property: color, border-color;
        transition-duration: 0.3s;
        transition-timing-function: ease-in-out;
        content: '+';
        top: calc(50% - 0.75rem);
        font-size: 1rem;
        font-weight: 700;
        width: 1rem;
        border: 4px solid $color-check;
        color: $color-check;
        border-radius: 50%;
        text-align: center;
        visibility: visible;
      }

      > input {
        display: block;
        margin-left: 2rem;
        width: calc(100% - 2rem);
        font-size: 1rem;
        background-image: none;
        background-color: transparent;
        outline: none;
        border: none;
        color: $color-text-light;
        line-height: 1;
        padding: 0;

        &::placeholder {
          color: $color-check;
        }
      }
    }

    &.reset {
      width: 100%;
      background: $color-app;
      float: left;
      padding: 0;
      height: 3rem;

      > input {
        display: block;
        padding: 1rem;
        line-height: 1;
        font-size: 0.8rem;
        width: 100%;
        height: 100%;
        -webkit-appearance: none;
        border: none;
        background: transparent;
        outline: none;
        text-transform: uppercase;
        color: $color-noncurrent-month;
        letter-spacing: 3px;
      }
    }

    &:not(.full):before {
      content: '';
      top: 50%;
      width: 0.5rem;
      transform: scaleX(-1) rotate(135deg);
      transform-origin: left top;
      border-right: 5px solid $color-check;
      border-top: 5px solid $color-check;
      animation: check-inactive 0.3s 0 $animation-easing both;
    }

    > * {
      transition: transform 0.3s $animation-easing;
      display: inline-block;
    }
    
    @each $label in $day-labels {
      &[for="#{$label}"] {
        background: map-get($colors, $label);
      }
    }
    
    @include range(2, 3) {
      width: day-span(3);
    }

    animation-duration: $label-speed;
    animation-timing-function: $animation-easing;
    animation-fill-mode: both;

    &:nth-child(2n - 1) {
      z-index: 20;
      animation-name: leftLabel-inactive;
    }
    &:nth-child(2n) {
      z-index: 10;
      animation-name: rightLabel-inactive;
    }
  }
}

.day:checked ~ .day:checked {
  ~ .calendar-labels {
    transition-delay: 0s;
    display: block;
    opacity: 1;
  }

  @for $week from 1 through 5 {
    @include range(($week - 1) * 7 + 1, $week * 7) {        
      ~ .calendar-labels {
        transform: translateY($week * $day-height);
        pointer-events: auto;
      }
    }
  }
  
  ~ .day:nth-child(7n) ~ .day,
  &:nth-child(7n) ~ .day {
    &:after {      
      transform: translateY(5 * $day-height);
      opacity: 0;
    }
  }
  
  ~ .calendar-labels {
    label:nth-child(2n - 1) {
      z-index: 20;
      animation: leftLabel-active $label-speed $animation-easing both;
    }
    label:nth-child(2n) {
      z-index: 10;
      animation: rightLabel-active $label-speed $animation-easing both;
    }
  }
}

@keyframes check-active {
  0% {
    width: 0;
    height: 0;
    opacity: 0;
  }
  50% {
    opacity: 1;
    width: 0.5rem;
    height: 0;
  }
  100% {
    opacity: 1;
  }
}

@keyframes check-inactive {
  50% {
    opacity: 1;
    width: 0.5rem;
    height: 0;
  }
  100% {
    width: 0;
    height: 0;
    opacity: 0;
  }
}

@keyframes labels-inactive {
  to {
    transform: translateY(0);
  }
}

@keyframes leftLabel-active {
  from {
    transform: translateX(-100%);
  }
}

@keyframes leftLabel-inactive {
  to {
    transform: translateX(-100%);
  }
}

@keyframes rightLabel-active {
  from {
    transform: translateX(-300%);
  }
}

@keyframes rightLabel-inactive {
  to {
    transform: translateX(-300%);
  }
}

@keyframes bg-active {
  from {
    transform: translateX(-100%);
  }
  to {
    transform: translateX(0);
  }
}

@keyframes bg-inactive {
  from {
    transform: translateX(0);
  }
  to {
    transform: translateX(100%);
  }
}

@keyframes day-active {
  50% {
    transform: scale(1.5);
  }
  100% {
    transform: scale(1);
  }
}

.meta {
  top: 50%;
  transform: translateY(-50%);
  font-size: 1.2rem;
  p, a { color: rgba(255, 255, 255, 0.5); }
  h1 {
    font-size: 3rem;
    line-height: 1.2;
    font-weight: 300;
    color: $color-text-light;
  }
  p { line-height: 1.4; }
  
  a:hover {
    color: rgba(255, 255, 255, 0.7);
  }
}

.device {
  position: absolute;
  right: 2rem;
  height: $device-height;
  width: $device-width;
  padding: 90px 10px;
  border: 5px solid $color-device-border;
  border-radius: 60px;
  background-color: $color-device;
  box-shadow: 0 0 50px 10px rgba(0,0,0,0.1);
  
  &:before, &:after {
    content: '';
    position: absolute;
    z-index: 2;
  }
  
  &:before {
    width: 20%;
    height: 10px;
    top: 40px;
    left: 40%;
    border-radius: 10px;
    background-color: $color-device-part;
  }
  
  &:after {
    width: 50px;
    height: 50px;
    border-radius: 50%;
    border: solid 5px lighten($color-device-part, 10%);
    left: calc(50% - 25px);
    bottom: 15px;
  }
  
  header {
    height: $header-height;
    background-color: $color-header;
  }
  
  section {
    height: calc(100% - #{$header-height});
    width: 100%;
    overflow: hidden;
    background-color: $color-app;
  }
}
            
          
!
            
              // I promise that I know JavaScript.
// Currently only works in Chrome.
// Firefox doesn't like custom inputs.
// @davidkpiano
            
          
!
999px
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