:root {
  /* Colors — matches nextto.ai */
  --color-primary: #121212;
  --color-secondary: #3b82f6;
  --color-success: #16a34a;
  --color-error: #dc2626;
  --color-warning: #d97706;
  --color-bg-primary: #ffffff;
  --color-bg-secondary: #f7f7f7;
  --color-text-primary: #121212;
  --color-text-secondary: #6b7280;
  --color-text-inverse: #ffffff;
  --color-text-disabled: rgba(18, 18, 18, 0.40);
  --color-border: #e5e7eb;

  /* Typography — Inter, matching nextto.ai */
  --font-family-primary: 'Inter', 'Roboto', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-weight-regular: 400;
  --font-weight-semibold: 600;
  --font-weight-bold: 700;
  --font-weight-heavy: 900;

  --font-size-xs: 0.75rem;
  --font-size-sm: 0.875rem;
  --font-size-base: 1.125rem;
  --font-size-lg: 1.25rem;
  --font-size-xl: 1.5rem;
  --font-size-2xl: clamp(1.75rem, 3vw, 3rem);
  --font-size-3xl: clamp(2.5rem, 5vw, 4.5rem);

  --line-height-tight: 1.2;
  --line-height-normal: 1.6;
  --line-height-relaxed: 1.8;

  /* Spacing */
  --space-xs: 0.25rem;
  --space-sm: 0.5rem;
  --space-md: 1rem;
  --space-lg: 1.5rem;
  --space-xl: 2rem;
  --space-2xl: 3rem;
  --space-3xl: 4rem;

  /* Border radius — matching nextto.ai card style */
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 32px;
  --radius-full: 9999px;

  /* Shadows */
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.07);
  --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.1);

  /* Transitions */
  --transition-fast: 0.2s ease;
  --transition-base: 0.3s ease;

  /* Layout */
  --max-width-content: 720px;
  --max-width-wide: 1200px;
  --header-height: 64px;
  --header-height-mobile: 56px;
}

/* Dark mode — matches nextto.ai dark color scheme */
@media (prefers-color-scheme: dark) {
  :root {
    --color-primary: #f7f7f7;
    --color-secondary: #60a5fa;
    --color-success: #4ade80;
    --color-error: #f87171;
    --color-warning: #fbbf24;
    --color-bg-primary: #191919;
    --color-bg-secondary: #2a2a2a;
    --color-text-primary: #f7f7f7;
    --color-text-secondary: rgba(247, 247, 247, 0.60);
    --color-text-inverse: #121212;
    --color-text-disabled: rgba(247, 247, 247, 0.40);
    --color-border: rgba(247, 247, 247, 0.12);

    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.2);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.3);
    --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.4);
  }
}