:root {
    /* Primary — brand indigo */
    --color-primary: #6366F1;
    --color-primary-dark: #4F46E5;
    --color-primary-light: #E0E7FF;

    /* Neutrals — brand-aligned */
    --color-text: #1E1B4B;
    --color-text-secondary: #3D3A6B;
    --color-text-tertiary: #5C598A;
    --color-bg: #FFFFFF;
    --color-bg-subtle: #FAFAFA;
    --color-bg-muted: #F5F4FA;
    --color-border: #DDDCE8;
    --color-border-subtle: #F0EFF5;
    --color-dark-bg: #1E1B4B;

    /* Overlay colors */
    --color-white-85: rgba(255, 255, 255, 0.85);
    --color-white-60: rgba(255, 255, 255, 0.6);
    --color-white-50: rgba(255, 255, 255, 0.5);
    --color-primary-12: rgba(99, 102, 241, 0.12);
    --color-primary-07: rgba(99, 102, 241, 0.07);
    --color-primary-04: rgba(99, 102, 241, 0.04);

    /* Typography */
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;

    --font-size-xs: 0.8125rem;
    --font-size-sm: 0.875rem;
    --font-size-base: 1.0625rem;
    --font-size-lg: 1.25rem;
    --font-size-xl: 1.5rem;
    --font-size-2xl: 2rem;
    --font-size-3xl: 2.5rem;
    --font-size-4xl: 3.25rem;
    --font-size-5xl: 4.5rem;

    --font-weight-light: 300;
    --font-weight-regular: 400;
    --font-weight-medium: 500;
    --font-weight-semibold: 600;
    --font-weight-bold: 700;

    --letter-spacing-tight: -0.03em;
    --letter-spacing-normal: -0.01em;
    --letter-spacing-wide: 0.05em;

    /* 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;
    --space-section: 10rem;

    /* Components */
    --nav-height: 64px;
    --btn-padding-y: 0.75rem;
    --btn-padding-x: 1.75rem;
    --btn-padding-y-sm: 0.5rem;
    --btn-padding-x-sm: 1.25rem;

    /* Layout */
    --max-width: 1200px;
    --max-width-narrow: 800px;

    --border-radius-sm: 0.5rem;
    --border-radius-md: 0.75rem;
    --border-radius-xl: 1.5rem;
    --border-radius-full: 9999px;

    /* Transitions */
    --ease-out-expo: cubic-bezier(0.16, 1, 0.3, 1);
    --ease-out-cubic: cubic-bezier(0.33, 0.66, 0.66, 1);
    --transition-fast: 200ms var(--ease-out-expo);
    --transition-medium: 300ms var(--ease-out-expo);
    --transition-normal: 400ms var(--ease-out-expo);

    /* Shadows */
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.04);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 20px 60px rgba(0, 0, 0, 0.08);
    --shadow-nav: 0 1px 0 rgba(0, 0, 0, 0.06);
}