html {
  font-size: 14px;
}

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

.btn:focus, .btn:active:focus, .btn-link.nav-link:focus, .form-control:focus, .form-check-input:focus {
  box-shadow: 0 0 0 0.1rem white, 0 0 0 0.25rem #258cfb;
}

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

body {
  margin-bottom: 60px;
}

#spinner {
  position: absolute;
  width: 100%;
  height: 100%;
  background-color: rgba(255,255,255,.7);
  z-index: 9999;
  display: none;
}

#spinner::after {
  content: '';
  display: block;
  position: absolute;
  left: 48%;
  top: 40%;
  width: 40px;
  height: 40px;
  border-style: solid;
  border-color: #000;
  border-top-color: transparent;
  border-width: 4px;
  border-radius: 50%;
  -webkit-animation: spin .8s linear infinite;
  animation: spin .8s linear infinite;
}

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