.loader-mini {
    border: 3px solid #f3f3f3; /* Light grey */
    border-top: 3px solid #3498db; /* Blue */
    border-radius: 50% !important;
    width: 7px;
    height: 7px;
    animation: spin 2s linear infinite;
    border-collapse: separate;
    margin: auto;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}


.loader-small {
    border: 5px solid #f3f3f3; /* Light grey */
    border-top: 5px solid #3498db; /* Blue */
    border-radius: 50% !important;
    width: 15px;
    height: 15px;
    animation: spin 2s linear infinite;
    border-collapse: separate;
    margin: auto;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}
.loader-med {
    border: 15px solid #f3f3f3; /* Light grey */
    border-top: 15px solid #3498db; /* Blue */
    border-radius: 50% !important;
    width: 75px;
    height: 75px;
    animation: spin 2s linear infinite;
    border-collapse: separate;
    margin: auto;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}
.loader-lg {
    border: 25px solid #f3f3f3; /* Light grey */
    border-top: 25px solid #3498db; /* Blue */
    border-radius: 50% !important;
    width: 125px;
    height: 125px;
    animation: spin 2s linear infinite;
    border-collapse: separate;
    margin: auto;
    position: fixed; /* or absolute */
    top: 45%;
    left: 46%;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

.spinner {
  margin: 100px auto;
  width: 50px;
  height: 40px;
  text-align: center;
  font-size: 10px;
}

.spinner > div {
  background-color: #999;
  height: 100%;
  width: 6px;
  display: inline-block;
  
  -webkit-animation: sk-stretchdelay 1.2s infinite ease-in-out;
  animation: sk-stretchdelay 1.2s infinite ease-in-out;
}

.spinner .rect2 {
  -webkit-animation-delay: -1.1s;
  animation-delay: -1.1s;
}

.spinner .rect3 {
  -webkit-animation-delay: -1.0s;
  animation-delay: -1.0s;
}

.spinner .rect4 {
  -webkit-animation-delay: -0.9s;
  animation-delay: -0.9s;
}

.spinner .rect5 {
  -webkit-animation-delay: -0.8s;
  animation-delay: -0.8s;
}

@-webkit-keyframes sk-stretchdelay {
  0%, 40%, 100% { -webkit-transform: scaleY(0.4) }  
  20% { -webkit-transform: scaleY(1.0) }
}

@keyframes sk-stretchdelay {
  0%, 40%, 100% { 
    transform: scaleY(0.4);
    -webkit-transform: scaleY(0.4);
  }  20% { 
    transform: scaleY(1.0);
    -webkit-transform: scaleY(1.0);
  }
}

.spinner-beacon {
  width: 40px;
  height: 40px;
  margin: 100px auto;
  background-color: #333;

  border-radius: 100%;  
  -webkit-animation: sk-scaleout 1.0s infinite ease-in-out;
  animation: sk-scaleout 1.0s infinite ease-in-out;
}

@-webkit-keyframes sk-scaleout {
  0% { -webkit-transform: scale(0) }
  100% {
    -webkit-transform: scale(1.0);
    opacity: 0;
  }
}

@keyframes sk-scaleout {
  0% { 
    -webkit-transform: scale(0);
    transform: scale(0);
  } 100% {
    -webkit-transform: scale(1.0);
    transform: scale(1.0);
    opacity: 0;
  }
}