:root {
  --green: #2E7D32;
  --green-light: #E8F5E9;
  --red: #C62828;
  --red-light: #FFEBEE;
  --text: #212121;
  --text-light: #757575;
  --white: #FFFFFF;
  --gray-100: #F5F5F5;
  --gray-200: #EEEEEE;
  --gray-300: #E0E0E0;
  --shadow: 0 2px 8px rgba(0,0,0,0.1);
}

[data-theme="dark"] {
  --green: #4CAF50;
  --green-light: #1B3D1F;
  --red: #EF5350;
  --red-light: #3D1F1F;
  --text: #E0E0E0;
  --text-light: #9E9E9E;
  --white: #1E1E1E;
  --gray-100: #121212;
  --gray-200: #2C2C2C;
  --gray-300: #3D3D3D;
  --shadow: 0 2px 8px rgba(0,0,0,0.3);
}

.theme-toggle {
  background: transparent;
  border: 1px solid var(--gray-300);
  border-radius: 8px;
  padding: 6px 12px;
  cursor: pointer;
  font-size: 14px;
  color: var(--text);
  display: flex;
  align-items: center;
  gap: 6px;
  transition: all 0.2s;
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  margin-left: auto;
}

.theme-toggle:hover {
  border-color: var(--green);
  background: var(--gray-100);
}