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

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
  background: #f5f5f5;
  color: #333;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 20px;
}

header {
  background: white;
  padding: 20px;
  border-radius: 8px;
  margin-bottom: 20px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

header h1 {
  font-size: 24px;
  color: #2563eb;
}

.header-actions {
  display: flex;
  gap: 10px;
  align-items: center;
}

.api-key-input {
  padding: 8px 12px;
  border: 1px solid #ddd;
  border-radius: 4px;
  width: 200px;
}

button {
  padding: 8px 16px;
  border: none;
  border-radius: 4px;
  cursor: pointer;
  font-size: 14px;
  transition: background 0.2s;
}

.btn-primary {
  background: #2563eb;
  color: white;
}

.btn-primary:hover {
  background: #1d4ed8;
}

.btn-success {
  background: #10b981;
  color: white;
}

.btn-success:hover {
  background: #059669;
}

.btn-danger {
  background: #ef4444;
  color: white;
}

.btn-danger:hover {
  background: #dc2626;
}

.status-indicator {
  padding: 4px 12px;
  border-radius: 12px;
  font-size: 12px;
  font-weight: 500;
}

.status-indicator.connected {
  background: #10b981;
  color: white;
}

.status-indicator.disconnected {
  background: #ef4444;
  color: white;
}

.tabs {
  display: flex;
  gap: 10px;
  margin-bottom: 20px;
  background: white;
  padding: 10px;
  border-radius: 8px;
  box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

.tab {
  padding: 10px 20px;
  border: none;
  background: transparent;
  cursor: pointer;
  border-radius: 4px;
  transition: background 0.2s;
}

.tab:hover {
  background: #f3f4f6;
}

.tab.active {
  background: #2563eb;
  color: white;
}

.tab-content {
  display: none;
  background: white;
  padding: 20px;
  border-radius: 8px;
  box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

.tab-content.active {
  display: block;
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 20px;
  margin-bottom: 20px;
}

.stat-card {
  background: #f9fafb;
  padding: 20px;
  border-radius: 8px;
  border: 1px solid #e5e7eb;
}

.stat-card h3 {
  font-size: 14px;
  color: #6b7280;
  margin-bottom: 10px;
}

.stat-card p {
  font-size: 32px;
  font-weight: bold;
  color: #2563eb;
}

.filters {
  display: flex;
  gap: 10px;
  margin-bottom: 20px;
}

.filters select {
  padding: 8px 12px;
  border: 1px solid #ddd;
  border-radius: 4px;
}

.table-container {
  overflow-x: auto;
}

table {
  width: 100%;
  border-collapse: collapse;
}

thead {
  background: #f9fafb;
}

th, td {
  padding: 12px;
  text-align: left;
  border-bottom: 1px solid #e5e7eb;
}

th {
  font-weight: 600;
  color: #374151;
}

tr:hover {
  background: #f9fafb;
}

.create-code-form {
  background: #f9fafb;
  padding: 20px;
  border-radius: 8px;
  margin-bottom: 20px;
}

.create-code-form h3 {
  margin-bottom: 15px;
}

.create-code-form input {
  padding: 8px 12px;
  border: 1px solid #ddd;
  border-radius: 4px;
  margin-right: 10px;
  margin-bottom: 10px;
}

.contract-editor {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.contract-editor button {
  align-self: flex-start;
}

#contractEditor {
  width: 100%;
  padding: 12px;
  border: 1px solid #ddd;
  border-radius: 4px;
  font-family: 'Courier New', monospace;
  font-size: 14px;
}

.error-message {
  color: #ef4444;
  padding: 10px;
  background: #fee2e2;
  border-radius: 4px;
  display: none;
}

.error-message.show {
  display: block;
}

.success-message {
  color: #10b981;
  padding: 10px;
  background: #d1fae5;
  border-radius: 4px;
  margin-bottom: 10px;
  display: none;
}

.success-message.show {
  display: block;
}