/*==========================================================
  Clunky Design System (CDS)
  Core Design Tokens
  Sprint 1 canonical foundation
==========================================================*/

:root {

  /*--------------------------------------------------------
    Brand / semantic colours
  --------------------------------------------------------*/
  --color-primary: #2563eb;
  --color-primary-light: #3b82f6;
  --color-primary-dark: #1d4ed8;
  --color-primary-contrast: #ffffff;
  --color-primary-dark-contrast: #ffffff;
  --color-secondary: #0f172a;
  --color-accent: #06b6d4;

  /*--------------------------------------------------------
    Backgrounds / surfaces
  --------------------------------------------------------*/
  --color-bg: #f8fafc;
  --color-bg-alt: #eef2f7;
  --color-surface: #ffffff;
  --color-surface-hover: #f3f6fb;
  --color-surface-subtle: #f8fafc;

  /*--------------------------------------------------------
    Text
  --------------------------------------------------------*/
  --color-text: #1e293b;
  --color-text-light: #475569;
  --color-text-muted: #64748b;
  --color-text-inverse: #ffffff;
  --color-heading: var(--color-text);

  /*--------------------------------------------------------
    Borders / focus
  --------------------------------------------------------*/
  --color-border: #dbe4ee;
  --color-border-light: #edf2f7;
  --color-focus: var(--color-primary);

  /*--------------------------------------------------------
    Status
  --------------------------------------------------------*/
  --color-success: #16a34a;
  --color-warning: #f59e0b;
  --color-danger: #dc2626;
  --color-info: #0284c7;

  /*--------------------------------------------------------
    Framework / callout colours
  --------------------------------------------------------*/
  --color-framework: #4f46e5;
  --color-framework-light: #eef2ff;
  --color-callout: #ecfeff;
  --color-callout-border: #06b6d4;
  --color-tip: #f0fdf4;
  --color-tip-border: #16a34a;
  --color-warning-bg: #fff7ed;
  --color-danger-bg: #fef2f2;

  /*--------------------------------------------------------
    Dark-mode semantic tokens
  --------------------------------------------------------*/
  --color-surface-dark: #0f172a;
  --color-surface-subtle-dark: #172033;
  --color-text-dark: #e2e8f0;
  --color-text-muted-dark: #94a3b8;
  --color-heading-dark: #f8fafc;
  --color-border-dark: #273449;

  /*--------------------------------------------------------
    Typography
  --------------------------------------------------------*/
  --font-primary:
      Inter,
      ui-sans-serif,
      system-ui,
      -apple-system,
      BlinkMacSystemFont,
      "Segoe UI",
      Roboto,
      Helvetica,
      Arial,
      sans-serif;
  --font-heading: var(--font-primary);
  --font-code: "JetBrains Mono", "Fira Code", Consolas, monospace;

  --fs-xs: .75rem;
  --fs-sm: .875rem;
  --fs-base: 1rem;
  --fs-lg: 1.125rem;
  --fs-xl: 1.25rem;
  --fs-h6: 1.125rem;
  --fs-h5: 1.35rem;
  --fs-h4: 1.65rem;
  --fs-h3: 2rem;
  --fs-h2: 2.6rem;
  --fs-h1: 3.6rem;
  --fs-display: 4.6rem;

  --fw-normal: 400;
  --fw-medium: 500;
  --fw-semibold: 600;
  --fw-bold: 700;
  --fw-black: 800;

  --lh-tight: 1.15;
  --lh-heading: 1.25;
  --lh-body: 1.75;
  --lh-loose: 2;

  /*--------------------------------------------------------
    Spacing
  --------------------------------------------------------*/
  --space-0: 0;
  --space-1: 4px;
  --space-2: 8px;
  --space-3: 12px;
  --space-4: 16px;
  --space-5: 20px;
  --space-6: 24px;
  --space-7: 32px;
  --space-8: 40px;
  --space-9: 48px;
  --space-10: 64px;
  --space-11: 80px;
  --space-12: 96px;
  --space-13: 120px;
  --space-14: 160px;

  /*--------------------------------------------------------
    Content widths
  --------------------------------------------------------*/
  --width-reading: 760px;
  --width-content: 860px;
  --width-wide: 1100px;
  --width-hero: 1280px;
  --width-full: 1440px;

  /*--------------------------------------------------------
    Component dimensions
  --------------------------------------------------------*/
  --radius-xs: 4px;
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 18px;
  --radius-xl: 24px;
  --radius-pill: 999px;

  --shadow-xs: 0 1px 2px rgba(15,23,42,.05);
  --shadow-sm: 0 2px 8px rgba(15,23,42,.08);
  --shadow-md: 0 8px 24px rgba(15,23,42,.10);
  --shadow-lg: 0 18px 48px rgba(15,23,42,.12);
  --shadow-xl: 0 30px 70px rgba(15,23,42,.18);

  --transition-fast: .15s ease;
  --transition-normal: .25s ease;
  --transition-slow: .45s ease;

  --z-base: 1;
  --z-dropdown: 1000;
  --z-sticky: 1100;
  --z-fixed: 1200;
  --z-modal-backdrop: 1300;
  --z-modal: 1400;
  --z-tooltip: 1500;

  --header-height: 72px;
  --toc-width: 280px;
  --article-max-width: 820px;
  --diagram-border: 1px solid var(--color-border);
  --diagram-bg: #fafcff;
  --btn-height: 48px;
  --btn-padding-x: 28px;
  --card-padding: 28px;
  --card-gap: 32px;
}