@import url(https://fonts.googleapis.com/css?family=Monoton);
@import url(https://fonts.googleapis.com/css?family=Great+Vibes);

html,
body {
  width: 100%;
  height: 100%;
  margin: 0;
  overflow: hidden;
}

main {
  position: absolute;
  left: 0;
  top: 0;
  width: 100%;
  height: 100%;
}

.bg {
  background-image: url(https://raw.githubusercontent.com/interaminense/repository-codepen/master/neon-codepen/bg-neon.jpg);
  width: 100%;
  height: 100%;
  background-position: center;
  background-size: 1250px;
  opacity: 0.3;
  position: absolute;
  left: 0;
  top: 0;
}

.wrapper {
  position: absolute;
  width: auto;
  height: 150px;
  left: 0;
  right: 0;
  top: 0;
  bottom: 0;
  margin: auto;
  text-align: center;
}

.wrapper h1 {
  font-size: 100px;
  margin: 0;
  font-weight: normal;
}

.wrapper h2 {
  font-size: 20px;
  margin: 0;
  font-weight: normal;
  line-height: 10px;
}

.font1 {
  font-family: "Monoton", cursive;
}
.font2 {
  font-family: "Great Vibes", cursive;
}

.input-text {
  position: absolute;
  left: 20px;
  top: 20px;
  width: 280px;
  padding: 5px 20px;
  border: none;
  background-color: rgba(0, 0, 0, 0.4);
  font-family: "Monoton", cursive;
  font-size: 35px;
  box-shadow: 15px 15px 23px rgba(0, 0, 0, 0.2);
  outline: none;
  z-index: 1;
}

.buttons {
  position: absolute;
  z-index: 1;
  right: 20px;
  top: 20px;
}

.buttons button {
  float: left;
  border: none;
  width: 16px;
  height: 16px;
  border-radius: 4px;
  margin-right: 10px;
  padding: 0;
  cursor: pointer;
}

button.btn-pink {
  background-color: #e91e63;
}
button.btn-yellow {
  background-color: #ffc107;
}
button.btn-green {
  background-color: #8bc34a;
}
button.btn-blue {
  background-color: #03a9f4;
}

@mixin content($color, $id) {
  animation: bgNeon-#{$id} 3s infinite;

  $colorNeon: $color;
  $colorLightNeon: lighten($colorNeon, 30%);
  $shadowColor: adjust-hue($colorNeon, -30);
  $bgNeon: adjust-color($shadowColor, $lightness: -40%);

  .input-text {
    color: $colorNeon;
  }

  .wrapper h1 {
    animation: neon2-#{$id} 3s infinite;
  }

  .wrapper h2 {
    text-shadow: 0 0 10px $colorNeon, 0 0 30px $shadowColor;
    color: $colorNeon;
  }

  @keyframes neon2-#{$id} {
    0% {
      color: $colorNeon;
      text-shadow: 0 0 10px $colorNeon, 1px 1px $colorLightNeon,
        0 0 280px $shadowColor;
    }
    80% {
      color: $colorNeon;
      text-shadow: 0 0 10px $colorNeon, 1px 1px $colorLightNeon,
        0 0 280px $shadowColor;
    }
    81% {
      color: #222;
      text-shadow: 0 0 10px #000, 1px 1px rgb(99, 74, 82), -2px 0px 4px #29121a;
    }
    94% {
      color: #222;
      text-shadow: 0 0 10px #000, 1px 1px rgb(99, 74, 82), -2px 0px 4px #29121a;
    }
    95% {
      color: $colorNeon;
      text-shadow: 0 0 10px $colorNeon, 1px 1px $colorLightNeon,
        0 0 280px $shadowColor;
    }
    96% {
      color: #222;
      text-shadow: 0 0 10px #000, 1px 1px rgb(99, 74, 82), -2px 0px 4px #29121a;
    }
    97% {
      color: $colorNeon;
      text-shadow: 0 0 10px $colorNeon, 1px 1px $colorLightNeon,
        0 0 280px $shadowColor;
    }
    98% {
      color: $colorNeon;
      text-shadow: 0 0 10px $colorNeon, 1px 1px $colorLightNeon,
        0 0 280px $shadowColor;
    }
    99% {
      color: #222;
      text-shadow: 0 0 10px #000, 1px 1px rgb(99, 74, 82), -2px 0px 4px #29121a;
    }
    100% {
      color: $colorNeon;
      text-shadow: 0 0 10px $colorNeon, 1px 1px $colorLightNeon,
        0 0 280px $shadowColor;
    }
  }

  @keyframes bgNeon-#{$id} {
    0% {
      background-color: $bgNeon;
    }
    80% {
      background-color: $bgNeon;
    }
    81% {
      background-color: #111;
    }
    94% {
      background-color: #111;
    }
    95% {
      background-color: $bgNeon;
    }
    96% {
      background-color: #111;
    }
    97% {
      background-color: $bgNeon;
    }
    98% {
      background-color: $bgNeon;
    }
    99% {
      background-color: #111;
    }
    100% {
      background-color: $bgNeon;
    }
  }
}

main.pink {
  @include content(#e91e63, 1);
}
main.yellow {
  @include content(#ffc107, 2);
}
main.green {
  @include content(#8bc34a, 3);
}
main.blue {
  @include content(#03a9f4, 4);
}