html {
  font-size: 14px;
}

@media (min-width: 768px) {
  html {
    font-size: 16px;
  }
}

html {
  position: relative;
  min-height: 100%;
}

body {
  margin-bottom: 60px;
}

.custom-row-margin {
  margin-left: 300px;
  margin-right: 300px;
}

.error-message {
  color: red;
  float: right;
}

.spinner {
  width: 35px;
  height: 35px;
  margin: 20px auto;
  border: 4px solid rgba(0, 0, 0, .1);
  border-left: 4px solid #000;
  border-right: 4px solid #000;
  animation: spinner 1s linear infinite forwards;
  -webkit-border-radius: 50%;
  -moz-border-radius: 50%;
  -o-border-radius: 50%;
  -ms-border-radius: 50%;
  border-radius: 50%
}

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