* { box-sizing: border-box; }

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background: #f5f5f4;
  color: #1c1c1a;
  margin: 0;
  padding: 2rem 1rem;
  display: flex;
  flex-direction: column;
  align-items: center;
}

h1 {
  font-size: 1.4rem;
  margin-bottom: 0.25rem;
}

.subtitle {
  color: #5a5a56;
  font-size: 0.9rem;
  margin-bottom: 1.5rem;
}

.cert-container {
  background: #fff;
  padding: 1rem;
  border-radius: 8px;
  box-shadow: 0 2px 12px rgba(0, 0, 0, 0.08);
  max-width: 900px;
  width: 100%;
}

canvas {
  width: 100%;
  height: auto;
  display: block;
  border-radius: 4px;
  user-select: none;
  -webkit-user-select: none;
}

.verify-link {
  margin-top: 1rem;
  font-size: 0.9rem;
}

.verify-link a {
  color: #0a5cff;
  text-decoration: none;
}

.error {
  color: #b00020;
  padding: 2rem;
  text-align: center;
}

.back-link {
  margin-top: 1.5rem;
  font-size: 0.85rem;
}

.back-link a {
  color: #5a5a56;
}

ul.cert-list {
  list-style: none;
  padding: 0;
}

ul.cert-list li {
  margin-bottom: 0.75rem;
}

ul.cert-list a {
  font-size: 1.1rem;
  color: #0a5cff;
  text-decoration: none;
}