CSS-only weather app concept

index.htm

<main>  
  <div class="device">
    <header></header>
    <section>
      <div class="weather time-morning active">
        <div class="icon">
          <i class="sun"></i>
        </div>
        <div class="content">
          <h3>Morning</h3>
          <div class="degrees">- 1</div>
          <div class="data">          
            <h2>Sunny</h2>
            <div>Wind: E 7 mph</div>
            <div>Humidity: 91%</div>
          </div>
        </div>
      </div>
      <div class="weather time-day">
        <div class="icon">
          <i class="sun"></i>
          <i class="cloud windy"></i>
        </div>
        <div class="content">
          <h3>Day</h3>
          <div class="degrees">+ 3</div>
          <div class="data">          
            <h2>Mostly Sunny</h2>
            <div>Wind: N 5 mph</div>
            <div>Humidity: 45%</div>
          </div>
        </div>
      </div>
      <div class="weather time-evening">
        <div class="icon">
          <i class="sun"></i>
          <i class="cloud"></i>
          <i class="sprinkles"></i>
          <i class="sprinkles"></i>
          <i class="sprinkles"></i>
          <i class="sprinkles"></i>
        </div>
        <div class="content">
          <h3>Evening</h3>
          <div class="degrees">0</div>
          <div class="data">          
            <h2>Rainy</h2>
            <div>Wind: W 12 mph</div>
            <div>Humidity: 91%</div>
          </div>
        </div>
      </div>
      <div class="weather time-night">
        <div class="icon">
          <i class="moon"></i>
          <i class="cloud"></i>
          <div class="snowflakes">
            <i class="snowflake"></i>
            <i class="snowflake"></i>
            <i class="snowflake"></i>
            <i class="snowflake"></i>
          </div>
        </div>
        <div class="content">
          <h3>Night</h3>
          <div class="degrees">- 2</div>
          <div class="data">          
            <h2>Cloudy</h2>
            <div>Wind: N 2 mph</div>
            <div>Humidity: 47%</div>
          </div>
        </div>
      </div>
    </section>
  </div>
</main>

master.scss

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

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

$color-morning: #e3bb88;
$color-day: #d89864;
$color-evening: #b1695a;
$color-night: #644749;

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

@font-face {
  font-family: 'weathericons';
  src: url('//cdnjs.cloudflare.com/ajax/libs/weather-icons/1.2/fonts/weathericons-regular-webfont.eot');
  src: url('//cdnjs.cloudflare.com/ajax/libs/weather-icons/1.2/fonts/weathericons-regular-webfont.eot?#iefix') format('embedded-opentype'), url('//cdnjs.cloudflare.com/ajax/libs/weather-icons/1.2/fonts/weathericons-regular-webfont.woff') format('woff'), url('//cdnjs.cloudflare.com/ajax/libs/weather-icons/1.2/fonts/weathericons-regular-webfont.ttf') format('truetype'), url('//cdnjs.cloudflare.com/ajax/libs/weather-icons/1.2/fonts/weathericons-regular-webfont.svg') format('svg');
  font-weight: normal;
  font-style: normal;
}

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

html, body {
  background-color: #5F7462;
  width: 100%;
  height: 100%;
}

aside, main {
  width: 50%;
  height: 100%;
  float: left;
  padding: 2rem;
}

.meta {
  top: 50%;
  transform: translateY(-50%);
  font-size: 1.2rem;
  p, a { color: rgba(255, 255, 255, 0.4); }
  h1 { font-size: 3rem; font-weight: 300; color: white; }
  p { line-height: 1.4; }
  
  a:hover {
    color: rgba(255, 255, 255, 0.7);
  }
}

.device {
  position: absolute;
/*   top: calc(50% - #{$device-height / 2}); */
  right: 2rem;
/*   display: none; */
  height: $device-height;
  width: $device-width;
  padding: 90px 10px;
  border: 5px solid #2f2f2f;
  border-radius: 60px;
  background-color: #171717;
  box-shadow: 0 0 50px 10px rgba(0,0,0,0.4);
  
  &:before, &:after {
    content: '';
    position: absolute;
    z-index: 2;
  }
  
  &:before {
    width: 20%;
    height: 10px;
    top: 40px;
    left: 40%;
    border-radius: 10px;
    background-color: #2f2f2f;
  }
  
  &:after {
    width: 50px;
    height: 50px;
    border-radius: 50%;
    border: solid 5px #2f2f2f;
    left: calc(50% - 25px);
    bottom: 20px;
  }
  
  section {
    height: calc(100% - 50px);
    width: 100%;
    overflow: hidden;
    background-color: $color-night;
  }
  
  header, footer {
    height: 40px;
    background-color: #8ba892;
  }
}

.weather {
  @extend %transition;
  height: percentage(1/6);
  overflow: hidden;
  
  &:hover, .device section:not(:hover) &:first-child {
    height: 50%;

    .icon {    
      transform: translateY(0);
      z-index: 1;
    }
    
    + .weather .icon {
      transform: translateY(-$device-height / 2);
    }
    
    ~ .weather .icon {
      z-index: -1;
    }
    
    &:not(:first-child) .data {
      animation-name: slide-up;
      animation-delay: 0.6s;
      animation-duration: 0.5s;
      animation-fill-mode: backwards;
      animation-timing-function: cubic-bezier(0.645, 0.045, 0.355, 1);
    }
  }
  
  .content {
    right: 0;
    width: 40%;
    position: absolute;
    color: white;
    
    @at-root .meta, & {
      font-family: 'Lato', sans-serif;
    }
  }
  
  h3 {
    text-transform: uppercase;
    color: rgba(255, 255, 255, 0.4);
    margin-bottom: 0;
    font-weight: 700;
  }
  
  h2 {
    font-size: 1.75rem;
    margin-bottom: 1rem;    
    font-weight: 400;
  }
  
  .degrees {
    font-size: 2.7rem;
    font-weight: 300;
    color: white;
    line-height: 1;
    
    &:after { content: '\00b0'; }
  }
}

.icon {
  z-index: -1;
  @extend %transition;
  font-family: 'weathericons';
  position: absolute;
  top: 1rem;
  left: 1rem;
  width: percentage(1/2);
  height: 50px;
  transform: translateY($device-height / 6);

  i {
    font-style: normal;
    position: absolute;
  }
}

.cloud {
  right: 0;
  top: 70px;
  width: 75%;
  height: 60px;
  background: black;
  border-radius: 50px;
  
  &:before, &:after {
    content: '';
    position: absolute;
    border-radius: 50%;
  }
  
  &:before {
    width: 80px;
    height: 80px;
    background: black;
    bottom: 20px;
    right: 20px;
  }
  
  &:after {
    width: 50px;
    height: 50px;
    background: black;
    bottom: 30px;
    left: 30px;
  }
}

.sun {
  @at-root .moon, & {    
    left: 5px;
    font-size: 6rem;
  }
  animation-name: rotate;
  animation-duration: 2s;
  animation-iteration-count: infinite;
  animation-timing-function: linear;
  
  &:before {
    content: "\f00d";
  }
}

.moon {
  &:before {
    content: "\f07b";
  }
}

.sprinkles {
  transform: skewX(-20deg);
  right: 30px;
  top: 100px;
  z-index: -1;
  animation-name: sprinkle;
  animation-duration: 1s;
  animation-iteration-count: infinite;
  animation-timing-function: linear;
  color: $color-morning;
  
  + .sprinkles { animation-delay: 0.25s; }
  + .sprinkles + .sprinkles { animation-delay: 0.5s; }
  + .sprinkles + .sprinkles + .sprinkles { animation-delay: 0.75s; }
  
  &:before {
    font-size: 3rem;
    content: "\f04e \f04e \f04e \f04e \f04e";
  }
}

.snowflakes {
  position: absolute;
  top: 70px;
  width: 70%;
  right: 0;
  animation: snowflakes 3s linear infinite;
  
  .snowflake { position: relative; }
}

.snowflake {
  color: $color-day;
  
  &:nth-child(1) { animation: snowflake 3.1s ease-in-out infinite; }
  &:nth-child(2) { animation: snowflake 3.1s 0.2s ease-in-out infinite reverse; top: -20px; }
  &:nth-child(3) { animation: snowflake 3.1s 0.2s ease-in-out infinite; top: 10px; }
  &:nth-child(4) { animation: snowflake 3.1s 0.4s ease-in-out infinite reverse; top: -30px; }

  &:before {
    font-size: 3rem;
    content: "\f076";
  }
}

.time {
  &-morning {
    background-color: $color-morning;
    
    .sun { color: $color-day; }
  }
  
  &-day {
    background-color: $color-day;
    
    .sun { color: $color-evening; }
    .cloud { &, &:before, &:after { background-color: $color-night; } }
  }
  
  &-evening {
    background-color: $color-evening;
    
    .sun { color: $color-night; }
    .cloud { &, &:before, &:after { background-color: $color-morning; } }
  }
  
  &-night {
    background-color: $color-night;
    
    .moon { color: $color-morning; }
    .cloud { &, &:before, &:after { background-color: $color-day; } }
  }
}

%transition {
  transition: all 0.7s ease-in-out;
}

@keyframes slide-up {
  from {
    transform: translateY(150%);
  }
  to {
    transform: translateY(0);
  }
}

@keyframes rotate {
  from {
    transform: rotate(0deg);
  }
  to {
    transform: rotate(360deg);
  }
}

@keyframes sprinkle {
  from {
    transform: translateX(0) translateY(0) skewX(-10deg);
    opacity: 1;
  }
  to {
    transform: translateX(-70px) translateY(150px) skewX(-10deg);
    opacity: 0;
  }
}

@keyframes snowflakes {
  from {
    transform: translateY(0);
    opacity: 1;
  }
  50% { opacity: 1; }
  to {
    transform: translateY(200px);
    opacity: 0;
  }
}

@keyframes snowflake {
  0% {
    transform: translateX(0);
  }
  25% {
    transform: translateX(50px);
  }
  50% {
    transform: translateX(0);
    opacity: 1;
  }
  75% {
    transform: translateX(30px);
  }
  100% {
    transform: translateX(0);
  }
}