[data-theme="dark"] {
  --sidebar-bg: #202020;
  --sidebar-text: #e3e2e0;
  --sidebar-hover: #2a2a2a;
  --canvas-bg: #191919;
  --canvas-max-width: 900px;
  --text-primary: #e3e2e0;
  --text-secondary: #7f7f7f;
  --border-color: #2a2a2a;
  --accent-color: #2eaadc;
  --accent-hover: #1e9ac9;
  --danger-color: #ff6b6b;
  --success-color: #4ade80;
  --warning-color: #facc15;
  --shadow-sm: 0 1px 2px rgba(0,0,0,0.2);
  --shadow-md: 0 4px 12px rgba(0,0,0,0.4);
}

:root {
  --sidebar-bg: #f7f6f3;
  --sidebar-width: 240px;
  --sidebar-text: #37352f;
  --sidebar-hover: #ecebea;
  --canvas-bg: #ffffff;
  --canvas-max-width: 900px;
  --text-primary: #37352f;
  --text-secondary: #9ca3af;
  --border-color: #e3e2e0;
  --accent-color: #2eaadc;
  --accent-hover: #1e9ac9;
  --danger-color: #eb5757;
  --success-color: #27ae60;
  --warning-color: #f2c94c;
  --font-sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Oxygen', 'Ubuntu', sans-serif;
  --font-mono: 'SFMono-Regular', Consolas, 'Liberation Mono', Menlo, monospace;
  --radius-sm: 4px;
  --radius-md: 6px;
  --radius-lg: 8px;
  --shadow-sm: 0 1px 2px rgba(0,0,0,0.04);
  --shadow-md: 0 4px 12px rgba(0,0,0,0.08);
  --transition: 150ms ease;
}

html {
  color-scheme: light dark;
}

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

html, body {
  height: 100%;
  font-family: var(--font-sans);
  color: var(--text-primary);
  background: var(--canvas-bg);
  -webkit-font-smoothing: antialiased;
  transition: background-color 0.3s ease, color 0.3s ease;
}

button {
  font-family: inherit;
  cursor: pointer;
  border: none;
  background: none;
}

input, textarea, select {
  font-family: inherit;
  color: inherit;
}

a {
  color: inherit;
  text-decoration: none;
}

ul, ol {
  list-style: none;
}

::-webkit-scrollbar {
  width: 8px;
  height: 8px;
}
::-webkit-scrollbar-track {
  background: transparent;
}
::-webkit-scrollbar-thumb {
  background: #d1d1d1;
  border-radius: 4px;
}
::-webkit-scrollbar-thumb:hover {
  background: #b1b1b1;
}