//some night-like colors
$navy: #030327;
$cheese: #fffdd0;
$dark_cheese: #f0edb4;
$white: #fff;
$night_sky: $navy;
$star_color: $white;
$crater_shadow: #d0cd8a;
//$crater_glow: #fffee1;
$moon_color: $cheese;
$crater_color: $dark_cheese;
//some dimensions and stuff
$moon_width: 12em;
$moon_height: 12em;

$day_sky: rgba(93, 214, 240, 1);

//some mixins
@mixin centerer {
  position: absolute;
  top: 50%;
  left: 50%;
  -webkit-transform: translate(-50%, -50%);
  -moz-transform: translate(-50%, -50%);
  -ms-transform: translate(-50%, -50%);
  -o-transform: translate(-50%, -50%);
  transform: translate(-50%, -50%);
}

@mixin cf {
  &:after {
    content: "";
    display: table;
    clear: both;
  }
}

@mixin shadow($h, $v, $b, $s, $c) {
  -webkit-box-shadow: $h $v $b $s $c;
  -moz-box-shadow:    $h $v $b $s $c;
   box-shadow:        $h $v $b $s $c;

}

@mixin circlizer($r) {
  -webkit-border-top-left-radius: $r;
  -webkit-border-top-right-radius: $r;
  -webkit-border-bottom-right-radius: $r;
  -webkit-border-bottom-left-radius: $r;

  -moz-border-radius-topleft: $r;
  -moz-border-radius-topright: $r;
  -moz-border-radius-bottomright: $r;
  -moz-border-radius-bottomleft: $r;

  border-top-left-radius: $r;
  border-top-right-radius: $r;
  border-bottom-right-radius: $r;
  border-bottom-left-radius: $r;
}

//a function
@function star_positioner() {
  @return random(1920) + px;
}

//some elements

html, body {
  width: 100%;
  height: 100%;
}

.sky {
  position: relative;
  width: 100%;
  height: 100%;
  background: $night_sky;
  overflow: hidden;
  -webkit-animation: its_becoming_morning 6s linear;
  -webkit-animation-fill-mode: forwards;
  -webkit-animation-delay: 3s;
}

.star {
  position: absolute;
  background:  rgba(255, 253, 208, .8);
  @include shadow(0, 0, .1em, .1em, rgba(255, 253, 208, .2));
  @for $s from 1 through 400 {
    $star_size: (random(2) / 10) + em;
    &:nth-child(#{$s}) {
      $vanishing_speed: random(20) + s;
      -webkit-animation: cya_stars $vanishing_speed ease;
      -webkit-animation-fill-mode: forwards;
      -webkit-animation-delay: random(5) + s;
      width: $star_size;
      height: $star_size;
      @include circlizer($star_size);
      top: star_positioner();
      left: star_positioner();
    }
  }

  //$vanishing_speed: random(40) + s;
  //-webkit-animation: cya_stars $vanishing_speed ease;
  //-webkit-animation-fill-mode: forwards;
  //-webkit-animation-delay: 6s;
}

.moon {
  @include centerer;
  z-index: 10;
  -webkit-animation: set_rise 7s ease-in-out;
  -webkit-animation-fill-mode: forwards;
}

.moon-pos {
  -webkit-animation: shine_on 10s ease; //13
  -webkit-animation-fill-mode: forwards;
  position: relative;
  z-index: 20;
  width: $moon_width;
  height: $moon_height;
  @include circlizer($moon_width);
  background: $moon_color;
  overflow: hidden;
}

.crater {
  -webkit-animation: poof 2s linear;
  -webkit-animation-delay: 3s;
  -webkit-animation-fill-mode: forwards;
  position: absolute;
  z-index: 30;
  background: $crater_color;
  @include shadow(inset, 0, 0, 1em, $crater_shadow);
  &:nth-child(1) { 
    width: $moon_width - 11; 
    height: $moon_height - 11;
    top: 4em;
    left: 2em;
    @include circlizer(1em);
  }
  &:nth-child(2) { 
    width: $moon_width - 10; 
    height: $moon_width - 10;
    top: 2em;
    left: 2em;
    @include circlizer(2em); 
  }
  &:nth-child(3) { 
    width: $moon_width - 9; 
    height: $moon_width - 9;
    bottom: 1em;
    @include circlizer(3em); 
  }
  &:nth-child(4) { 
    width: $moon_width - 9; 
    height: $moon_width - 9;
    bottom: 2em;
    right: 2em;
    @include circlizer(3em); 
  }
  &:nth-child(5) { 
    width: $moon_width - 10.5; 
    height: $moon_height - 10.5;
    right: 6em;
    bottom: .5em;
    @include circlizer(1.5em);
  }
}

.moon-neg {
  position: absolute;
  z-index: 40;
  top: 0;
  right: 0;
  width: $moon_width - 3em;
  height: $moon_height - 3em;
  @include circlizer($moon_width - 3em);
  background: $night_sky;
  -webkit-animation: poof 1s linear;
  -webkit-animation-fill-mode: forwards;
  -webkit-animation-delay: 3s;
}

.tag {
  color: $cheese;
  font-family: 'Seaweed Script';
  font-size: 6em;
}

//animation

@-webkit-keyframes cya_stars {
  100% { 
    -webkit-transform: translateY(1080px);
    opacity: 0;
    transition: opacity;
  }
}


@-webkit-keyframes its_becoming_morning {
  100% {
    background: $day_sky;
    -webkit-transition: background;
    -webkit-transition-timing-function: ease-out;
  }
}

@-webkit-keyframes poof {
  100% {
    background: orange;
    height: 0;
    width: 0;
    opacity: 0;
    top: 50%;
    -webkit-transition: opacity;
    -webkit-transition: width;
    -webkit-transition: height;
    -webkit-transition: top;
    -webkit-transition: background;
    -webkit-transition-timing-function: ease-out;
  }
}

@-webkit-keyframes shine_on {
  100% { 
    background: orange;
    -webkit-transition: background;
    -webkit-box-shadow: 0 0 6em 1em rgba(243, 229, 70, .8);
  }
}

@-webkit-keyframes set_rise {
  30% {
    -webkit-transform: translateY(500px);
  }
}