:root {
  color-scheme: light;

  --ds-font-sans: Inter, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --ds-font-size-xs: 11px;
  --ds-font-size-sm: 12px;
  --ds-font-size-md: 14px;
  --ds-font-size-lg: 18px;
  --ds-font-size-xl: 24px;
  --ds-line-height-tight: 1.2;
  --ds-line-height-base: 1.45;

  --ds-color-ink: #07173b;
  --ds-color-ink-subtle: #40556d;
  --ds-color-muted: #66758a;
  --ds-color-surface: #ffffff;
  --ds-color-surface-subtle: #f6f9fb;
  --ds-color-border: #dce5eb;
  --ds-color-border-strong: #b9c8d1;
  --ds-color-brand: #087e8b;
  --ds-color-brand-hover: #066b76;
  --ds-color-brand-accent: #00a9b7;
  --ds-color-brand-soft: #edf8fa;
  --ds-color-link: #006db6;
  --ds-color-success: #16945e;
  --ds-color-warning: #b86a12;
  --ds-color-danger: #d74236;
  --ds-color-overlay: rgba(7, 23, 59, 0.44);

  --ds-space-1: 4px;
  --ds-space-2: 8px;
  --ds-space-3: 12px;
  --ds-space-4: 16px;
  --ds-space-5: 20px;
  --ds-space-6: 24px;
  --ds-space-8: 32px;
  --ds-space-10: 40px;

  --ds-radius-sm: 4px;
  --ds-radius-md: 6px;
  --ds-radius-lg: 8px;
  --ds-radius-round: 999px;
  --ds-control-height-sm: 36px;
  --ds-control-height-md: 44px;
  --ds-control-height-lg: 48px;
  --ds-shadow-raised: 0 12px 32px rgba(7, 23, 59, 0.12);
  --ds-shadow-overlay: 0 24px 64px rgba(7, 23, 59, 0.2);
  --ds-focus-ring: 0 0 0 3px rgba(0, 109, 182, 0.24);
  --ds-motion-fast: 120ms ease;
  --ds-motion-base: 200ms ease;
  --ds-z-header: 20;
  --ds-z-navigation: 50;
  --ds-z-overlay: 90;
  --ds-z-toast: 100;

  /* Compatibility aliases while legacy feature CSS is migrated incrementally. */
  --navy: var(--ds-color-ink);
  --navy2: #0b2c5d;
  --teal: var(--ds-color-brand);
  --teal2: var(--ds-color-brand-accent);
  --aqua: var(--ds-color-brand-soft);
  --line: var(--ds-color-border);
  --muted: var(--ds-color-muted);
  --soft: var(--ds-color-surface-subtle);
  --coral: var(--ds-color-danger);
  --orange: var(--ds-color-warning);
  --green: var(--ds-color-success);
  --blue: var(--ds-color-link);
  --shadow: var(--ds-shadow-overlay);
}