/**
 * Atlas Vertical – Design tokens
 * CSS custom properties for colors, spacing, typography scale.
 * Dark mode is intentionally distinct, not just inverted.
 */

:root {
  /* Colors – light mode */
  --color-bg: #ffffff;
  --color-bg-alt: #f5f5f5;
  --color-text: #1a1a1a;
  --color-text-muted: #666666;
  --color-accent: #0066cc;
  --color-border: #e5e5e5;
  --color-on-accent: #ffffff;
  --color-error: #cc3333;

  /* Spacing – generous for editorial feel */
  --space-xs: 0.25rem;
  --space-sm: 0.5rem;
  --space-md: 1rem;
  --space-lg: 1.5rem;
  --space-xl: 2.5rem;
  --space-2xl: 4rem;
  --space-3xl: 6rem;
  --space-4xl: 8rem;

  /* Typography – Inter as editorial heading font */
  --font-sans: var(--gh-font-body, 'Inter', system-ui, -apple-system, 'Segoe UI', Roboto, sans-serif);
  --font-heading: var(--gh-font-heading, 'Inter', system-ui, -apple-system, sans-serif);
  --font-mono: ui-monospace, 'Cascadia Code', 'Source Code Pro', Menlo, Consolas, monospace;
  --font-size-xs: 0.75rem;
  --font-size-sm: 0.875rem;
  --font-size-base: 1rem;
  --font-size-lg: 1.125rem;
  --font-size-xl: 1.375rem;
  --font-size-2xl: 2rem;
  --font-size-3xl: 3rem;
  --font-size-4xl: 3.5rem;
  --line-height-tight: 1.15;
  --line-height-normal: 1.6;
  --line-height-relaxed: 1.75;

  /* Layout */
  --container-max: 720px;
  --container-wide: 1080px;
}

/* Dark mode – explicit preference (cinematic, video-forward) */
[data-theme="dark"] {
  --color-bg: #0a0a0a;
  --color-bg-alt: #141414;
  --color-text: #e0e0e0;
  --color-text-muted: #8a8a8a;
  --color-accent: #5ba3ff;
  --color-border: #252525;
  --color-on-accent: #0a0a0a;
  --color-error: #ff6666;
}

/* Dark mode – system preference when no explicit choice is stored */
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --color-bg: #0a0a0a;
    --color-bg-alt: #141414;
    --color-text: #e0e0e0;
    --color-text-muted: #8a8a8a;
    --color-accent: #5ba3ff;
    --color-border: #252525;
    --color-on-accent: #0a0a0a;
    --color-error: #ff6666;
  }
}