:root {
  /* Brand Colors */
  --color-brand-primary: #1b2944;
  --color-brand-secondary: #142036;
  --color-brand-red: #af2c2c;
  --color-brand-light: #deecf9;

  /* Provider Brand Colors */
  --color-brand-microsoft: #0078d4;
  --color-brand-microsoft-hover: #106ebe;
  --color-brand-google: #4285f4;
  --color-brand-google-hover: #3367d6;
  --color-brand-apple: #000000;
  --color-brand-apple-hover: #333333;
  --color-brand-okta: #007dc1;
  --color-brand-okta-hover: #005a8c;

  /* Neutral Colors */
  --color-neutral-white: #ffffff;
  --color-neutral-light: #f8f9fa;
  --color-neutral-subtle: #f5f5f5;
  --color-neutral-border: #dee2e6;
  --color-neutral-text: #212529;
  --color-neutral-muted: #6c757d;
  --color-neutral-dark: #343a40;

  /* Text Colors */
  --color-text-primary: #1a202c;
  --color-text-secondary: #4a5568;
  --color-text-tertiary: #718096;
  --color-text-quaternary: #2d3748;

  /* Status Colors */
  --color-success: #28a745;
  --color-success-hover: #218838;
  --color-success-text: #155724;
  --color-success-bg: #c6f6d5;
  --color-warning: #ffc107;
  --color-warning-hover: #e0a800;
  --color-warning-text: #92400e;
  --color-warning-bg: #fef3c7;
  --color-warning-border: #f59e0b;
  --color-error: #dc3545;
  --color-error-hover: #c82333;
  --color-error-text: #721c24;
  --color-info: #17a2b8;
  --color-info-hover: #138496;
  --color-info-text: #0c5460;

  /* Spacing Scale (4px base) */
  --space-xs: 4px;
  --space-sm: 8px;
  --space-md: 12px;
  --space-base: 16px;
  --space-lg: 20px;
  --space-xl: 24px;
  --space-2xl: 32px;
  --space-3xl: 40px;
  --space-4xl: 48px;
  --space-5xl: 64px;

  /* Typography Scale */
  --font-size-xs: 12px;
  --font-size-sm: 14px;
  --font-size-base: 16px;
  --font-size-lg: 18px;
  --font-size-xl: 20px;
  --font-size-2xl: 24px;
  --font-size-3xl: 28px;
  --font-size-4xl: 32px;

  /* Font Weights */
  --font-weight-normal: 400;
  --font-weight-medium: 500;
  --font-weight-semibold: 600;
  --font-weight-bold: 700;

  /* Line Heights */
  --line-height-tight: 1.25;
  --line-height-normal: 1.5;
  --line-height-relaxed: 1.75;

  /* Border Radius */
  --radius-sm: 3px;
  --radius-base: 4px;
  --radius-md: 6px;
  --radius-lg: 8px;
  --radius-xl: 12px;
  --radius-full: 9999px;

  /* Shadows */
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-base: 0 1px 3px 0 rgba(0, 0, 0, 0.1), 0 1px 2px 0 rgba(0, 0, 0, 0.06);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);

  /* Z-Index Scale */
  --z-dropdown: 1000;
  --z-sticky: 1020;
  --z-modal: 1050;
  --z-tooltip: 1100;

  /* Touch Targets (Accessibility) */
  --touch-target-min: 44px;
  --touch-target-comfortable: 48px;

  /* Breakpoints (for reference in media queries) */
  --breakpoint-sm: 576px;
  --breakpoint-md: 768px;
  --breakpoint-lg: 992px;
  --breakpoint-xl: 1200px;

  /* Component Specific Tokens */
  --button-height-sm: 32px;
  --button-height-base: 44px;
  --button-height-lg: 48px;

  --input-height-sm: 32px;
  --input-height-base: 40px;
  --input-height-lg: 48px;

  /* Badge Colors */
  --badge-default-bg: #edf2f7;
  --badge-default-text: #2d3748;
  --badge-require-grant-bg: var(--color-warning-bg);
  --badge-require-grant-text: var(--color-warning-text);
  --badge-existing-bg: var(--color-success-bg);
  --badge-existing-text: var(--color-success-text);

  /* Border Colors */
  --border-light: #e2e8f0;
  --border-hover: var(--color-brand-primary);
}

/* Screen Reader Only Content */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* Focus Management */
*:focus {
  outline: 2px solid var(--color-brand-primary);
  outline-offset: 2px;
}

*:focus:not(:focus-visible) {
  outline: none;
}

/* Skip Navigation */
.skip-link {
  position: absolute;
  top: -40px;
  left: 6px;
  background: var(--color-brand-primary);
  color: var(--color-neutral-white);
  padding: var(--space-sm) var(--space-base);
  text-decoration: none;
  border-radius: var(--radius-base);
  z-index: var(--z-tooltip);
}

.skip-link:focus {
  top: 6px;
}