body {
  margin: 2rem;
  font-family: Gill Sans, Gill Sans MT, Calibri, Trebuchet MS, sans-serif;
}

h2 {
  margin-top: 0;
}

section {
  border-bottom: 2px solid;
  margin: 2rem 0;
  padding-bottom: 2rem;
}

button {
  cursor: pointer;
  min-width: 8rem;
  font-size: 1rem;
}

@media (prefers-reduced-motion: reduce) {
  button {
    transition: none;
  }

  button:hover {
    transform: none;
  }
}
@keyframes spinner {
  to {
    transform: rotate(360deg);
  }
}

substrate-button button, substrate-button a.btn {
  color: #000;
  cursor: pointer;
  background: none;
  border: 1px solid;
  outline: 1px solid rgba(0, 0, 0, 0);
  padding: .5rem 2rem;
  font-size: 1rem;
  text-decoration: none;
  transition: all .2s;
  transform: translateY(1px);
}

:is(substrate-button button, substrate-button a.btn):focus {
  outline: 1px solid;
}

:is(substrate-button button, substrate-button a.btn):hover {
  outline: 1px solid;
  transform: translateY(0);
}

:is(substrate-button button, substrate-button a.btn):active {
  transform: translateY(2px);
}

:is(substrate-button button, substrate-button a.btn):disabled {
  cursor: not-allowed;
  opacity: .4;
}

:is(substrate-button button, substrate-button a.btn):disabled:hover {
  outline-color: rgba(0, 0, 0, 0);
  transform: translateY(1px);
}

:is(substrate-button button, substrate-button a.btn).spinning {
  opacity: .4;
}

:is(substrate-button button, substrate-button a.btn).spinning .btn-content {
  visibility: hidden;
}

:is(substrate-button button, substrate-button a.btn).spinning:hover {
  cursor: initial;
}

:is(substrate-button button, substrate-button a.btn).spinning:after {
  content: "";
  box-sizing: border-box;
  background: none;
  border-top: 2px solid #000;
  border-right: 2px solid rgba(0, 0, 0, 0);
  border-radius: 50%;
  width: 16px;
  height: 16px;
  margin: auto;
  animation: .6s linear infinite spinner;
  position: absolute;
  top: 0;
  bottom: 0;
  left: 0;
  right: 0;
}