:root {
  /* Primary — Signal Blue (board #1D4FE8) */
  --primary-50: #E8EEFE;
  --primary-100: #D0DBFD;
  --primary-200: #A3B8FB;
  --primary-300: #6E8FF5;
  --primary-400: #3B6AEE;
  --primary-500: #1D4FE8;
  --primary-600: #163FCB;
  --primary-700: #1233A3;
  --primary-800: #0E2678;
  --primary-900: #091850;

  /* Neutral — Paper / Fog / Ink */
  --neutral-50: #FFFFFF;
  --neutral-100: #F5F6F9;
  --neutral-200: #E7EAF1;
  --neutral-300: #C8CEDA;
  --neutral-400: #9AA3B2;
  --neutral-500: #6B7384;
  --neutral-600: #4A5263;
  --neutral-700: #2F3644;
  --neutral-800: #1E2430;
  --neutral-900: #151A24;

  /* Accent — nomes do board */
  --accent-signal: #1D4FE8;
  --accent-paper: #F5F6F9;
  --accent-fog: #E7EAF1;
  --accent-ink: #151A24;
  --accent-white: #FFFFFF;

  /* Semantic */
  --color-background: #FFFFFF;
  --color-background-alt: #F5F6F9;
  --color-surface: #FFFFFF;
  --color-surface-dark: #151A24;
  --color-surface-tint: #E7EAF1;
  --color-surface-elevated: #FFFFFF;
  --color-text: #151A24;
  --color-text-muted: #6B7384;
  --color-text-accent: #1D4FE8;
  --color-text-on-dark: #FFFFFF;
  --color-text-on-primary: #FFFFFF;
  --color-overlay: rgba(21, 26, 36, 0.45);
  --color-overlay-light: rgba(255, 255, 255, 0.92);
  --color-image-letterbox: #151A24;
  --color-watermark: rgba(21, 26, 36, 0.045);

  /* CTA */
  --cta-primary-bg: #1D4FE8;
  --cta-primary-text: #FFFFFF;
  --cta-primary-hover-bg: #163FCB;
  --cta-secondary-bg: #151A24;
  --cta-secondary-text: #FFFFFF;
  --cta-secondary-hover-bg: #2F3644;
  --cta-ghost-bg: transparent;
  --cta-ghost-text: #151A24;
  --cta-ghost-border: #E7EAF1;
  --cta-ghost-hover-bg: #F5F6F9;

  /* Border */
  --border-default: #E7EAF1;
  --border-subtle: rgba(21, 26, 36, 0.08);
  --border-on-dark: rgba(255, 255, 255, 0.14);
  --border-focus: #1D4FE8;
  --border-error: #E24B4B;

  /* Typography */
  --font-display: Onest, Inter, system-ui, sans-serif;
  --font-body: Inter, system-ui, sans-serif;

  /* Spacing */
  --space-1: 4px;
  --space-2: 8px;
  --space-3: 12px;
  --space-4: 16px;
  --space-5: 24px;
  --space-6: 32px;
  --space-7: 48px;
  --space-8: 64px;
  --space-9: 96px;
  --space-10: 128px;

  /* Radius */
  --radius-none: 0;
  --radius-sm: 8px;
  --radius-md: 16px;
  --radius-lg: 24px;
  --radius-xl: 32px;
  --radius-full: 9999px;

  /* Shadows */
  --shadow-none: none;
  --shadow-sm: 0 8px 24px rgba(21, 26, 36, 0.04);
  --shadow-md: 0 16px 40px rgba(21, 26, 36, 0.06);
  --shadow-lg: 0 28px 64px rgba(21, 26, 36, 0.08);
  --shadow-card-hover: 0 20px 48px rgba(21, 26, 36, 0.08);

  /* Motion */
  --duration-fast: 180ms;
  --duration-normal: 400ms;
  --duration-slow: 800ms;
  --ease-default: cubic-bezier(0.4, 0, 0.2, 1);
  --ease-enter: cubic-bezier(0.16, 1, 0.3, 1);
  --ease-exit: cubic-bezier(0.4, 0, 1, 1);
  --ease-drawer: cubic-bezier(0.77, 0.2, 0.05, 1);

  /* Layout */
  --max-content: 1200px;
  --scroll-offset: 88px;
  --header-stick-trigger: 8px;
}