:root {
  /* Color Palette: Industrial, high-contrast, authority */
  --bg-core: #09090b;
  --bg-surface: #18181b;
  --bg-surface-alt: #27272a;
  --bg-surface-hover: #3f3f46;

  --fg-core: #fafafa;
  --fg-muted: #a1a1aa;

  --accent-primary: #e4e4e7; /* Silver/white accent */
  --accent-alert: #ef4444; /* Red for emphasis/warnings */
  --accent-success: #10b981; /* Green for positive ROI */

  /* Typography */
  --font-display: 'Space Grotesk', sans-serif;
  --font-text: 'Chivo', sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;

  --text-xs: 0.75rem;
  --text-sm: 0.875rem;
  --text-base: 1rem;
  --text-lg: 1.125rem;
  --text-xl: 1.25rem;
  --text-2xl: 1.5rem;
  --text-3xl: 1.875rem;
  --text-4xl: 2.25rem;
  --text-5xl: 3rem;
  --text-6xl: 3.75rem;
  --text-7xl: 4.5rem;

  --leading-none: 1;
  --leading-tight: 1.1;
  --leading-snug: 1.25;
  --leading-normal: 1.5;
  --leading-relaxed: 1.625;

  --tracking-tighter: -0.05em;
  --tracking-tight: -0.025em;
  --tracking-normal: 0;
  --tracking-wide: 0.025em;

  /* Spacing */
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-6: 1.5rem;
  --space-8: 2rem;
  --space-12: 3rem;
  --space-16: 4rem;
  --space-24: 6rem;
  --space-32: 8rem;

  /* Layout */
  --max-w-screen: 1440px;
  --max-w-content: 80ch;
  --container-padding: var(--space-4);

  @media (min-width: 768px) {
    --container-padding: var(--space-8);
  }

  @media (min-width: 1024px) {
    --container-padding: var(--space-12);
  }

  /* Borders & Radius */
  --border-width: 1px;
  --border-thick: 2px;
  --radius-none: 0;
  --radius-sm: 2px; /* Intentionally sharp, not rounded-everything */

  /* Transitions */
  --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
}