:root {
  /* Backgrounds */
  --color-bg: #ffffff;
  --color-bg-alt: #f8fafc;
  --color-bg-gradient: linear-gradient(135deg, #f8fafc 0%, #eef2ff 100%);
  --color-surface: #ffffff;
  --color-surface-hover: #f8fafc;

  /* Text */
  --color-text: #0f172a;
  --color-text-secondary: #475569;
  --color-text-muted: #94a3b8;

  /* Accent — Blue */
  --color-accent: #2563eb;
  --color-accent-hover: #3b82f6;
  --color-accent-light: rgba(37, 99, 235, 0.07);
  --color-accent-glow: rgba(37, 99, 235, 0.15);

  /* Gradient */
  --gradient-accent: linear-gradient(135deg, #2563eb, #7c3aed);
  --gradient-accent-hover: linear-gradient(135deg, #3b82f6, #8b5cf6);
  --gradient-subtle: linear-gradient(135deg, rgba(37, 99, 235, 0.04), rgba(124, 58, 237, 0.04));

  /* Borders */
  --color-border: #e2e8f0;
  --color-border-hover: rgba(37, 99, 235, 0.35);

  /* Typography */
  --font-family: 'Inter', system-ui, -apple-system, BlinkMacSystemFont, sans-serif;
  --font-size-xs: 0.75rem;
  --font-size-sm: 0.875rem;
  --font-size-base: 1rem;
  --font-size-lg: 1.125rem;
  --font-size-xl: 1.25rem;
  --font-size-2xl: 1.5rem;
  --font-size-3xl: 2rem;
  --font-size-4xl: 2.75rem;
  --font-size-5xl: 3.75rem;
  --font-weight-light: 300;
  --font-weight-regular: 400;
  --font-weight-medium: 500;
  --font-weight-semibold: 600;
  --font-weight-bold: 700;
  --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;
  --space-4xl: 6rem;
  --space-5xl: 8rem;

  /* Layout */
  --container-max: 1100px;
  --container-padding: 1.5rem;
  --nav-height: 4rem;
  --border-radius: 8px;
  --border-radius-lg: 12px;
  --border-radius-xl: 16px;

  /* Transitions */
  --transition-fast: 150ms ease;
  --transition-base: 250ms ease;
  --transition-slow: 400ms ease;

  /* Shadows */
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.06);
  --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.08);
  --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.1);
  --shadow-glow: 0 4px 20px rgba(37, 99, 235, 0.15);
  --shadow-glow-lg: 0 8px 40px rgba(37, 99, 235, 0.2);
}