body {
  margin: 0;
  font-family: sans-serif;
  background: #f9f9f9;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

header {
  text-align: center;
  padding: 0.5rem;
}

.bmc-button-header img {
  height: 36px;
  width: auto;
}

main {
  flex: 1;
  display: flex;
  flex-direction: column;
  justify-content: flex-start;
  align-items: center;
  padding: 0.5rem;
  width: 100%;
}

section {
  margin: 0.75rem 0;
}

.gallery-fallback {
  grid-column: 1 / -1;
  text-align: center;
  font-weight: bold;
  color: #c00;
  padding: 1rem;
}

.how-to {
  max-width: 800px;
  margin: 1rem auto;
  padding: 0.75rem;
  background: #fff;
  border: 1px solid #ddd;
  border-radius: 6px;
}

.how-to h2 {
  text-align: center;
  margin-bottom: 1rem;
  font-size: 1.5rem;
  color: #333;
}

.how-to ol {
  padding-left: 1.5rem;
  line-height: 1.6;
}

.how-to a {
  color: #007bff;
  text-decoration: none;
}

.how-to a:hover {
  text-decoration: underline;
}

.gallery {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(120px, 1fr));
  gap: 0.5rem;
  justify-items: stretch;
  align-items: start;
  width: 100%;
  max-width: 1000px;
  margin: 0 auto;
  padding: 0.25rem;
}

.card {
  text-align: center;
  border: 1px solid #ddd;
  border-radius: 4px;
  background: #fff;
  padding: 0.5rem;
  width: 100%;
  box-sizing: border-box;
}

.card img,
.img-fallback {
  width: 48px;
  height: 48px;
  margin: auto;
  display: flex;
  align-items: center;
  justify-content: center;
  object-fit: contain;
}

.card-title {
  font-size: 0.75rem;
  margin-top: 0.25rem;
  color: #333;
  word-break: break-word;
}