<h1>CSS LOADING SPINNERS</h1>

<div class="loaders-container">
  
  <div class="container">
    <div class="box"></div>
  </div>

  <div class="container">
    <div class="line"></div>
    <div class="line"></div>
    <div class="line"></div>
    <div class="line"></div>
  </div>

  <div class="container">
    <div class="circle"></div>
  </div>

  <div class="container">
    <div class="wavecontainer">
      <div class="wave"></div>
      <div class="wave"></div>
      <div class="wave"></div>
      <div class="wave"></div>
      <div class="wave"></div>
    </div>
  </div>

  <div class="container">
    <div class="circleloader"></div>
  </div>

   <div class="container">
     <div class="switchbox">
       <div class="switch"></div>
       <div class="switch"></div>
     </div>
   </div>

  <div class="container">
    <div class="bouncybox">
      <div class="bouncy"></div>
    </div>
  </div>
  
</div>

body {
  background: #16a085;
}

h1 {
  text-align: center;
  font-family: Arial;
  color: #FFF;
  font-size: 50px;
}

.loaders-container {
  padding: 20px;
  margin: 0 auto;
  width: 700px;
  text-align: center;
  font-size: 0;
  
  .container {
    position: relative;
    display: inline-block;
    box-sizing: border-box;
    padding: 30px;
    width: 25%;
    height: 140px;
  }
}

.box {
  position: relative;
  box-sizing: border-box;
  border: 4px solid #FFF;
  width: 80px;
  height: 80px;
  animation: spin 3s infinite linear;
  
  &:before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    box-sizing: border-box;
    border: 4px solid #FFF;
    width: 60px;
    height: 60px;
    animation: pulse 1.5s infinite ease;
  }
}

.line {
  position: absolute;
  top: 50%;
  margin-left: 10px;
  width: 60px;
  height: 4px;
  background: #FFF;
  animation: spin 1.5s infinite ease;
  
  &:nth-of-type(2) { animation-delay: 0.1s; }  
  &:nth-of-type(3) { animation-delay: 0.2s; }
  &:nth-of-type(4) { animation-delay: 0.3s; }
}

.circle {
  box-sizing: border-box;
  width: 80px;
  height: 80px;
  border-radius: 100%;
  border: 10px solid rgba(255, 255, 255, 0.2);
  border-top-color: #FFF;
  animation: spin 1s infinite linear;
}

.wave {
  margin-top: 15px;
  float: left;
  width: 18px;
  height: 40px;
  box-sizing: border-box;
  border: 2px solid #FFF;
  margin-left: -2px;
  animation: slide 0.6s infinite linear;
  
  &:first-child {
    border-top-left-radius: 10px;
    border-bottom-left-radius: 10px;  
  }

  &:last-child {
    border-top-right-radius: 10px;
    border-bottom-right-radius: 10px;
  }
  
  &:nth-child(2n+1) {
    animation-delay: 0.3s;
  }
}

.circleloader {
  position: absolute;
  box-sizing: border-box;
  top: 50%;
  margin-top: -10px;
  border-radius: 16px;
  width: 80px;
  height: 20px;
  padding: 4px;
  background: rgba(255, 255, 255, 0.4);
  
  &:before {
    content: '';
    position: absolute;
    border-radius: 16px;
    width: 20px;
    height: 12px;
    left: 0;
    background: #FFF;
    animation: push 1s infinite linear;    
  }
}

.switchbox {
  position: relative;
  height: 80px;
  animation: spin 2s infinite linear; 
  
  .switch {
    position: absolute;
    top: 50%;
    margin-top: -10px;
    width: 20px;
    height: 20px;
    background: #FFF;
    border-radius: 20px;
    animation: cross 2s infinite linear;

    &:nth-of-type(2) {
       animation-delay: -1s;
    }
  }
}

.bouncybox {
  height: 100px;
  width: 40px;
  margin-left: 20px;
  
  .bouncy {
    width: 40px;
    height: 40px;
    border-radius: 20px;
    background: #ecf0f1;
    animation: bouncy 2s infinite ease-in-out;
  }
}

@keyframes bouncy {
  40% {
    height: 40px;
  }
  50% {
    transform: translate(0, 65px);
    height: 34px;
    border-radius: 20px;
  }
  65% {
    height: 40px; 
  }
}

@keyframes push {
  50% {
    left: 56px;
  }
}

@keyframes slide {
  50% {
    margin-top: 25px;
  }
}

@keyframes pulse { 
  50% { 
    border-width: 30px;
  } 
}

@keyframes spin { 
  100% { 
    transform: rotate(360deg); 
  } 
} 

@keyframes cross {
  50% {
    margin-left: 60px;
  }
}