.main-content
  h1 Favorite time of the day?
  .window
    .cat
      svg(width="80px" viewBox="0 0 15.59 15.59")
        path(d="M14.42,11.993c-0.104-1.334-0.709-2.336-1.57-3.153c-0.479-0.449-0.906-0.563-1.414-0.563c0,0-0.204,0.005-0.041,0.212  c0.215,0.271,1.791,2.328,1.768,4.011c-0.029,1.948-1.958,1.837-1.958,1.837c0.812-1.542,0.402-3.001,0.276-3.512  c-0.238-0.943-0.709-1.857-1.417-2.738C9.191,6.988,8.312,6.468,7.425,6.523c-0.379-0.654-0.716-1.18-1.011-1.61  C8.02,3.479,6.974,2.787,6.063,0c-0.211,0.591-0.38,1.028-0.507,1.31c-0.644-0.08-2.071-0.08-2.714,0  C2.716,1.028,2.547,0.591,2.336,0C1.423,2.794,0.374,3.467,1.999,4.909c0.173,3.278,0.849,4.149,1.942,5.732  c0.9,1.304,0.675,1.768,1.098,3.569c-3.197,2.014,2.223,1.241,3.063,1.2C10.266,15.305,14.777,16.6,14.42,11.993z")
    .illustration
      .time.dusk
        .sky
          svg(width="250px" viewBox="0 0 113.39 99.21")
            linearGradient(id="sky_sunset" gradientUnits="userSpaceOnUse" x1="0%" y1="0%" x2="100%" y2="0%" gradientTransform="rotate(-25)")
              stop(offset="0%" stop-color="#f7ffa9" stop-opacity="1")
              stop(offset="40%" stop-color="#ffcc33" stop-opacity="1")
              stop(offset="100%" stop-color="#ffbe1d" stop-opacity="1")
            linearGradient(id="sky_dusk" gradientUnits="userSpaceOnUse" x1="0%" y1="0%" x2="100%" y2="0%" gradientTransform="rotate(45)")
              stop(offset="0%" stop-color="#ffd4fe" stop-opacity="1")
              stop(offset="30%" stop-color="#ffd4fe" stop-opacity="1")
              stop(offset="100%" stop-color="#ffd26a" stop-opacity="1")
            polygon(fill="#B3EFFF" id="sky" points="111.971,97.368 111.971,1.842 1.419,1.842 1.419,9.042 1.419,97.368")
        .sun
          svg(width="90px" viewBox="0 0 90.71 90.71")
            g
              circle(opacity="0.1" fill="#FFECDC" cx="45.355" cy="45.354" r="43.212")
              circle(opacity="0.3" fill="#FFEBDE" cx="45.355" cy="45.354" r="31.131")
              circle(id="sun" fill="#f9db5a" cx="45.355" cy="45.354" r="21.374")
        .clouds
          svg(width="80px" viewBox="0 0 42.52 19.84")
            g
              path(fill="#fff" d="M38.582,8.005c1.865,0,3.393,1.673,3.393,3.717l0,0c0,2.042-1.527,3.716-3.393,3.716H24.039h-0.484   c-2.676,0-4.847-2.378-4.847-5.309c0-2.932,2.17-5.309,4.847-5.309c0,0,2.242-4.247,7.756-4.247c3.453,0,6.787,1.925,6.787,7.432   H38.582z")
              path(fill="#FCFCFC" d="M20.863,11.667c1.908,0,3.471,1.71,3.471,3.8l0,0c0,2.09-1.563,3.8-3.471,3.8H5.998H5.501   c-2.736,0-4.956-2.431-4.956-5.428s2.219-5.428,4.956-5.428c0,0,2.292-4.342,7.929-4.342c3.532,0,6.939,1.968,6.939,7.598H20.863z")
        .stars
          svg(width="210px" viewBox="0 0 99.21 25.51")
            g
              ellipse(opacity="0.3" fill="#FFFFFF" cx="97.067" cy="11.361" rx="0.727" ry="0.832")
              ellipse(opacity="0.3" fill="#FFFFFF" cx="2.144" cy="3.901" rx="0.728" ry="0.831")
              ellipse(opacity="0.3" fill="#FFFFFF" cx="14.743" cy="10.455" rx="0.727" ry="0.831")
              ellipse(opacity="0.3" fill="#FFFFFF" cx="66.439" cy="9.407" rx="0.728" ry="0.831")
              ellipse(opacity="0.3" fill="#FFFFFF" cx="77.518" cy="1.332" rx="0.728" ry="0.831")
              ellipse(opacity="0.3" fill="#FFFFFF" cx="82.514" cy="13.459" rx="0.728" ry="0.831")
        .moon
          svg(width="35px" viewBox="0 0 15.59 19.28")
            path(opacity="0.8" fill="#FFFFFF" d="M13.718,16.993c-5.085,0-9.208-4.122-9.208-9.208c0-2.97,1.407-5.608,3.589-7.292  C3.722,1.205,0.381,5,0.381,9.579c0,5.086,4.123,9.208,9.209,9.208c2.116,0,4.063-0.716,5.619-1.916  C14.722,16.95,14.226,16.993,13.718,16.993z")
        .mountain
          svg(width="250px" viewBox="0 0 113.39 36.85")
            path(id="mountain" fill="#87D6D6" d="M111.971,0.478C106.576,2.7,95.837,16.269,88.655,15C81.29,13.699,68.052,6.244,62.31,3.639  C56.566,1.036,41.955,16.42,36.835,15.948c-5.118-0.474-17.355-9.232-23.475-8.403c-3.964,0.537-8.932,4.276-11.941,6.844v21.983  h110.552V0.478z")
        .hill
          svg(width="250px" viewBox="0 0 113.39 17.86")
            path(id="hill" fill="#38C6B1" d="M111.971,12.132c-4.609-0.766-8.889-1.889-12.432-3.579C86.127-0.36,71.48-3.606,43.082,6.31  c-6.086,0.811-7.853,0.51-17.234-2.951C18.487,0.644,8.764,1.176,1.419,2.621v15.017h110.551V12.132z")
        .land
          svg(width="250px" viewBox="0 0 113.39 24.09")
            path(id="land" fill="#4CB5AB" d="M111.971,23.82V3.328C84.865-6.96,12.407,11.765,1.419,14.708v9.112H111.971z")
        .trees
          svg(width="210px" viewBox="0 0 85.04 41.1")
            g
              rect(class="trunks" x="75.121" y="26.724" fill="#8C5F50" width="2.166" height="8.666")
              rect(class="trunks" x="67.539" y="28.89" fill="#8C5F50" width="2.168" height="6.5")
            g
              path(class="trees" fill="#A0D755" d="M83.785,21.309c0,4.187-3.393,7.581-7.58,7.581s-7.582-3.395-7.582-7.581     c0-9.749,3.395-20.579,7.582-20.579S83.785,11.56,83.785,21.309z")
              path(class="trees" fill="#A0D755" d="M75.121,24.933c0,3.382-2.91,6.125-6.5,6.125c-3.588,0-6.498-2.743-6.498-6.125     c0-7.873,2.91-16.622,6.498-16.622C72.211,8.311,75.121,17.06,75.121,24.933z")
            g(opacity="0.2")
              path(fill="#FFFFFF" d="M72.955,21.309c0-8.892,1.883-18.68,4.332-20.333c-0.354-0.16-0.715-0.247-1.082-0.247     c-4.188,0-7.582,10.83-7.582,20.579c0,4.187,3.395,7.581,7.582,7.581c0.369,0,0.729-0.035,1.082-0.086     C74.84,28.277,72.955,25.127,72.955,21.309z")
              path(fill="#FFFFFF" d="M66.457,24.933c0-7.106,1.383-14.901,3.191-16.359c-0.334-0.157-0.676-0.263-1.025-0.263     c-3.588,0-6.5,8.749-6.5,16.622c0,3.382,2.912,6.125,6.5,6.125c0.35,0,0.691-0.034,1.025-0.084     C67.84,30.508,66.457,27.984,66.457,24.933z")
            g
              rect(class="trunks" x="3.466" y="35.946" fill="#8C5F50" width="1.475" height="4.424")
              path(class="trees" fill="#A0D755" d="M7.153,34.472c0,1.628-1.32,2.949-2.949,2.949S1.254,36.1,1.254,34.472c0-5.162,1.32-11.799,2.949-11.799     S7.153,29.31,7.153,34.472z")
              path(opacity="0.2" fill="#FCFCFC" d="M3.466,34.472c0-4.233,0.666-9.452,1.58-11.194c-0.267-0.383-0.55-0.604-0.842-0.604    c-1.629,0-2.949,6.637-2.949,11.799c0,1.628,1.32,2.949,2.949,2.949c0.295,0,0.573-0.057,0.842-0.137    C4.135,36.919,3.466,35.806,3.466,34.472z")        
  .option-wrapper
    .option.active(data-option="dusk") Dusk
    .option(data-option="day") Day
    .option(data-option="sunset") Sunset
    .option(data-option="night") Night

aside.context
  .explanation 
    | Part II of CSS Animations Experiment. 
    a(href="https://codepen.io/oliviale/details/jxPgKv" target="_blank") Part I here.

footer
    a(href="https://twitter.com/meowlivia_" target="_blank")
      i.icon-social-twitter.icons
    a(href="https://github.com/oliviale" target="_blank")
      i.icon-social-github.icons
    a(href="https://dribbble.com/oliviale" target="_blank")
     i.icon-social-dribbble.icons
View Compiled
body {
  background: radial-gradient(#870000, #53346d);

  font-family: "Comfortaa", sans-serif;
}


.main-content {
  max-width: 700px;
  margin: 4em auto 0;
  text-align: center;
}

h1 {
  margin: 2em 0;
  color: #fff;
}

svg {
  display: inline-block;
}

path, polygon, circle, rect {
  transition: fill 1s ease;
}

.window {
  position: relative;
  background: #fff;
  margin: 0 auto 2em;
  display: inline-block;
  padding: 10px;
  &:before {
    content: '';
    position: absolute;
    margin: auto;
    left: 0;
    right: 0;
    height: 18px;
    top: 100%;
    width: 112%;
    margin-left: -6%;
    background: #f4c7c7;
  }
}

.cat {
  position: absolute;
  z-index: 10;
  bottom: -5px;
  right: -35px;
}

.illustration {
  position: relative;
  align-self: end;
  margin: auto;
  width: 250px;
  overflow: hidden;
}

.mountain, .hill, .land, .trees, .sun, .clouds, .moon, .stars {
  position: absolute;
  left: 0;
  margin: auto;
  right: 0;
}

.mountain {
  bottom: 45px;
}

.hill {
  bottom: 45px;
}

.trees {
  bottom: 25px;
}

.sun {
  top: 120px;
  margin-left: -20px;
  transition: all 1s ease;
  transform: scale(0.2);
}

.moon, .stars {
  top: 25px;
  opacity: 0;
}

.land {
  bottom: 3px;
}

.clouds {
  top: 50px;
  right: -500px;
  transition: all 1s ease .1s;
}

.day {
  .sun {
    top: 10px;
    margin-left: 0;
    transform: scale(1);
  }
  .clouds {
    right: 0;
  }
}

.night {
  .stars, .moon {
    opacity: 1;
    transition: all 1s ease .5s;
  }
  #sky {
    fill: #17377f;
  }
  #mountain {
    fill: #73addf;
  }
  #hill {
    fill: #659fcd;
  }
  #land {
    fill: #508bb5;
  }
  .trees {
    fill: #1c2c3b;
  }
  .trunks {
    fill: #3f3e3d;
  }
}

.sunset {
  .sun {
    top: 60px;
    margin-left: -80px;
    transform: scale(1);
  }
  #sun {
    fill: #fff;
  }
  #sky {
    fill: url(#sky_sunset);
  }
  #mountain {
    fill: #efbb2b;
  }
  #hill {
    fill: #e6ad28;
  }
  #land {
    fill: #de9f26;
  }
  .trees {
    fill: #747c0b;
  }
  .trunks {
    fill: #3f3e3d;
  }
}

.dusk {
  .sun {
    top: 60px;
    margin-left: 140px;
    transform: scale(1);
  }
  #sun {
    fill: #ffffda;
  }
  #sky {
    fill: url(#sky_dusk);
  }
  #mountain {
    fill: #f1a3a2;
  }
  #hill {
    fill: #e09c9c;
  }
  #land {
    fill: #c4918d;
  }
  .trees {
    fill: #ce791c;
  }
  .trunks {
    fill: #8c5f50;
  }
}




.option-wrapper {
  display: flex;
  margin: 3em auto;
  background: rgba(255, 255, 255, 0.25);
  border-radius: 4px;
  padding: 5px;
  max-width: 300px;
  font-size: 12px;
  line-height: 1.2;
  .option {
    transition: all 200ms ease;
    padding: 10px 10px 8px;
    width: 50%;
    border-radius: 4px;
    cursor: pointer;
    color: #fff;
    &.active {
      background: #fff;
      color: #333;
      pointer-events: none;
    }
  }
}

aside.context {
  text-align: center;
  color: #fff;
  a {
    text-decoration: none;
    color: #fff;
    padding: 3px 0;
    border-bottom: 1px dashed;
  }
  .explanation {
    max-width: 700px;
    margin: 4em auto;
  }
}

footer {
  text-align: center;
  margin: 8em auto;
  width: 100%;
  a {
    text-decoration: none;
    display: inline-block;
    width: 45px;
    height: 45px;
    border-radius: 50%;
    background: transparent;
		border: 1px dashed #fff;
    color: #fff;
    margin: 5px;
    &:hover {
      background: rgba(255,255,255,0.1);
    }
    .icons {
      margin-top: 12px;
      display: inline-block;
      font-size: 20px;
    }
  }
}
View Compiled
$(".option").on("click", function() {
  $(".option").removeClass("active");
  $(this).addClass("active");
  var type = $(this).data("option");
  setTimeout(function() {
    if (type === "day") {
      $(".time").attr('class', 'time day');
    } else if (type === "night") {
      $(".time").attr('class', 'time night');
    } else if (type === "dusk") {
      $(".time").attr('class', 'time dusk');
    } else if (type === "sunset") {
      $(".time").attr('class', 'time sunset');
    } 
  }, 500);
});

External CSS

  1. https://cdnjs.cloudflare.com/ajax/libs/simple-line-icons/2.4.1/css/simple-line-icons.min.css

External JavaScript

  1. https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js