* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family: system-ui, -apple-system, sans-serif;
  background: #f5f5f5;
  color: #1a1a1a;
}

/* App layout */
.app-main {
  max-width: 900px;
  margin: 0 auto;
  padding: 48px 24px;
}

/* Hero section */
.hero {
  text-align: center;
  margin-bottom: 48px;
}

.hero h1 {
  font-size: 32px;
  margin-bottom: 8px;
}

.hero p {
  color: #666;
  font-size: 16px;
  line-height: 1.5;
}

/* Card grid */
.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 16px;
  margin-bottom: 48px;
}

.card {
  background: white;
  border: 1px solid #ddd;
  border-radius: 8px;
  padding: 24px;
}

.card h3 {
  font-size: 16px;
  margin-bottom: 8px;
}

.card p {
  font-size: 14px;
  color: #555;
  line-height: 1.5;
}

/* Fragment embedder */
.fragment-embedder {
  margin-bottom: 48px;
}

.fragment-embedder h2 {
  font-size: 22px;
  margin-bottom: 16px;
}

.embed-controls {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  align-items: end;
  margin-bottom: 16px;
}

.field {
  display: flex;
  flex-direction: column;
  gap: 4px;
  flex: 1;
}

.field label {
  font-size: 13px;
  font-weight: 600;
  color: #555;
}

.field input {
  padding: 8px 12px;
  border: 1px solid #ccc;
  border-radius: 6px;
  font-size: 14px;
  font-family: inherit;
  width: 100%;
}

button {
  padding: 8px 20px;
  background: #a14f2b;
  color: white;
  border: none;
  border-radius: 6px;
  font-size: 14px;
  cursor: pointer;
  font-family: inherit;
  white-space: nowrap;
}

button:hover {
  background: #8a3f21;
}

.preview-container {
  border: 1px solid #ddd;
  border-radius: 8px;
  background: white;
  min-height: 120px;
  overflow: hidden;
}

.preview-placeholder {
  padding: 48px;
  text-align: center;
  color: #999;
}

.hint {
  font-size: 12px;
  color: #888;
  margin-top: 8px;
}

/* Bottom content */
.bottom-content {
  text-align: center;
  padding: 24px;
  color: #888;
  font-size: 14px;
}

.bottom-content a {
  color: #a14f2b;
}