body {
  box-sizing: border-box;
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica,
    Arial, sans-serif, 'Apple Color Emoji', 'Segoe UI Emoji', 'Segoe UI Symbol';
  margin: 0;
}

header {
  background: #039be5;
  padding: 1rem 5vw;
}

header a {
  color: #fff;
  font-weight: 800;
  text-decoration: none;
}

main {
  display: none;
  margin: 4rem auto 6rem;
  max-width: 650px;
  width: 90vw;
}

#firebaseui-auth-container {
  font-weight: 800;
  margin: 4rem auto 6rem;
  max-width: 650px;
  width: 90vw;
}

footer {
  color: #444;
  font-size: 0.875rem;
  text-align: center;
}

footer a {
  color: inherit;
}

.products {
  display: grid;
  gap: 2rem;
  grid-template-columns: repeat(2, 1fr);
  margin-top: 3rem;
}

.product img {
  width: 300px;
}

.product input {
  border: 1px solid #039be5;
  border-radius: 0.25rem;
  font-size: 1.125rem;
  line-height: 1.25rem;
  padding: 0.25rem;
}

button {
  display: block;
  cursor: pointer;
  background: #fbc02e;
  border: none;
  border-radius: 0.25rem;
  color: #fff;
  font-size: 1.25rem;
  font-weight: 800;
  line-height: 1.25rem;
  margin-top: 0.25rem;
  padding: 0.25rem;
}

button:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

select {
  transition: box-shadow 0.2s ease;
  background: none;
  border: 5px solid #fbc02e;
  font-size: 1.25rem;
}

label {
  display: block;
}

#subscribe,
#my-subscription {
  display: none;
}

/* Test card number */
.test-card-notice {
  display: block;
  margin-block-start: 1em;
  margin-block-end: 1em;
  margin-inline-start: 0px;
  margin-inline-end: 0px;
}
.card-number {
  display: inline;
  white-space: nowrap;
  font-family: Menlo, Consolas, monospace;
  color: #3c4257;
  font-weight: 500;
}
.card-number span {
  display: inline-block;
  width: 4px;
}