body {
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  max-width: 700px;
  margin: 2rem auto;
  padding: 0 1rem;
  line-height: 1.6;
}

.site-header {
  position: relative;
  text-align: center;
}

h1 {
  text-align: center;
  margin: 0;
  padding: 0;
}

.admin-link {
  position: absolute;
  top: 0;
  right: 0;
  font-size: 0.9rem;
  color: #666;
  text-decoration: none;
  padding: 0.2rem 0.5rem;
}

.admin-link:hover {
  text-decoration: underline;
}

.center { text-align: center; }

code {
  background: #f4f4f4;
  padding: 0.15rem 0.4rem;
  border-radius: 4px;
  word-break: break-all;
}

button, .button {
  display: inline-block;
  padding: 1rem 2rem;
  font-size: 1.1rem;
  background: #0066cc;
  color: #fff;
  border: none;
  border-radius: 6px;
  cursor: pointer;
  text-decoration: none;
}

button:hover, .button:hover { background: #0055aa; }

button:disabled {
  background: #999;
  cursor: not-allowed;
}

.button-download {
  background: #2e7d32;
}

.button-download:hover {
  background: #1b5e20;
}

#status {
  color: #2e7d32;
  min-height: 1.5em;
  margin-top: 0.75rem;
  font-weight: 600;
}

.error {
  color: #c62828;
  min-height: 1.5em;
  margin-top: 0.5rem;
}

.download {
  margin-bottom: 2rem;
}

.copy {
  margin-top: 2rem;
  padding-top: 2rem;
  border-top: 1px solid #ddd;
}

.small {
  color: #666;
  font-size: 0.9rem;
}

.tutorial {
  margin-top: 3rem;
}

.step {
  margin-bottom: 2rem;
}

.step img {
  max-width: 100%;
  border: 1px solid #ddd;
  border-radius: 8px;
  box-shadow: 0 2px 6px rgba(0,0,0,0.1);
}

.step-number {
  display: inline-block;
  background: #0066cc;
  color: #fff;
  width: 1.6rem;
  height: 1.6rem;
  line-height: 1.6rem;
  border-radius: 50%;
  text-align: center;
  margin-right: 0.5rem;
  font-weight: 600;
}