:root {
  /* ============================================================
   * Palette
   * Generic colour scales. Component CSS should prefer semantic
   * tokens (below) over these raw values.
   * ============================================================ */

  /* Gray */
  --color-gray-50: #f9fafb;
  --color-gray-100: #f3f4f6;
  --color-gray-200: #e5e7eb;
  --color-gray-300: #d1d5db;
  --color-gray-400: #9ca3af;
  --color-gray-500: #6b7280;
  --color-gray-600: #4b5563;
  --color-gray-700: #374151;
  --color-gray-800: #1f2937;
  --color-gray-900: #111827;

  /* Red (brand red at 700) */
  --color-red-50: #fef2f2;
  --color-red-100: #fee2e2;
  --color-red-200: #fecaca;
  --color-red-300: #fca5a5;
  --color-red-400: #f87171;
  --color-red-500: #ef4444;
  --color-red-600: #dc2626;
  --color-red-700: #D44618; /* brand */
  --color-red-800: #a53713;
  --color-red-900: #862c0e;

  /* Green */
  --color-green-50: #f0fdf4;
  --color-green-100: #dcfce7;
  --color-green-500: #10b981;
  --color-green-600: #059669;
  --color-green-700: #15803d;

  /* Blue — two-tone: solid for text/icons/borders, light for surfaces */
  --color-blue: #1D4ED8;
  --color-blue-light: #DBEAFE;

  /* Teal — two-tone: solid for text/icons/borders, light for surfaces */
  --color-teal: #0E655B;
  --color-teal-light: #CFF4EF;

  /* Amber — two-tone: solid for text/icons/borders, light for surfaces */
  --color-amber: #DA8B03;
  --color-amber-light: #FFF3DF;

  /* Purple — two-tone: solid for text/icons/borders, light for surfaces */
  --color-purple: #7C3AED;
  --color-purple-light: #F3EFFE;

  /* Pure */
  --white: #ffffff;
  --black: #000000;

  /* ============================================================
   * Semantic colour tokens
   * ============================================================ */

  /* Brand / primary */
  --primary: var(--color-red-700);
  --primary-dark: var(--color-red-800);
  --primary-light: #e25526;
  --primary-lighter: rgba(212, 70, 24, 0.1);

  /* Secondary */
  --secondary: #4F5979;
  --secondary-dark: #3e4c59;
  --secondary-light: #7a8c9d;
  --secondary-lighter: var(--color-gray-50);

  /* Status */
  --success: var(--color-green-500);
  --success-dark: var(--color-green-600);
  --success-surface: var(--color-green-50);

  --warning: var(--color-amber);
  --warning-dark: var(--color-amber);
  --warning-surface: var(--color-amber-light);

  --error: var(--color-red-500);
  --error-dark: var(--color-red-700);
  --error-surface: var(--color-red-50);
  --error-lighter: #f3d5d5;

  /* Danger is an alias of error — pick either at call sites. */
  --danger: var(--error);
  --danger-dark: var(--error-dark);
  --danger-surface: var(--error-surface);

  --info: var(--color-blue);
  --info-surface: var(--color-blue-light);

  /* Text */
  --text-primary: #333333;
  --text-secondary: #4f5979;
  --text-tertiary: #959baf;
  --text-on-primary: var(--white);

  /* Surfaces */
  --body-bg: #f5f6fa;
  --surface-bg: var(--white);
  --surface-bg-alt: var(--color-gray-50);
  --surface-bg-hover: var(--color-gray-50);
  --surface-lighter: #fafbfd;
  --surface-danger: #fdf5f5;

  /* Borders */
  --border-primary: #959baf;
  --border-secondary: #e4e9f3;
  --border-color: var(--border-secondary); /* default border */

  /* ============================================================
   * Border radius
   * ============================================================ */
  --border-radius-xs: 2px;
  --border-radius-sm: 4px;
  --border-radius-md: 6px;
  --border-radius-lg: 10px;
  --border-radius-xl: 15px;
  --border-radius-full: 9999px;
  --border-radius: var(--border-radius-md); /* default */

  /* ============================================================
   * Spacing — single 4px-based scale
   * Number = multiple of 4px (e.g. --space-4 = 16px).
   * ============================================================ */
  --space-0: 0;
  --space-1: 4px;
  --space-2: 8px;
  --space-3: 12px;
  --space-4: 16px;
  --space-5: 20px;
  --space-6: 24px;
  --space-8: 32px;
  --space-10: 40px;
  --space-12: 48px;
  --space-16: 64px;

  /* ============================================================
   * Shadows
   * ============================================================ */
  --shadow-xs: 0 1px 2px 0 rgba(0, 0, 0, 0.04);
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-md: 0 0 11px 0 rgba(0, 0, 0, 0.10);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);

  /* ============================================================
   * Typography
   * ============================================================ */
  --font-family-base: 'Gotham', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;

  --letter-spacing: -0.03em;

  --font-size-2xs: 0.5625rem;   /* 9px */
  --font-size-xs: 0.625rem;     /* 10px */
  --font-size-sm: 0.75rem;      /* 12px */
  --font-size-base: 0.875rem;   /* 14px */
  --font-size-lg: 1rem;         /* 16px */
  --font-size-xl: 1.125rem;     /* 18px */
  --font-size-2xl: 1.25rem;     /* 20px */
  --font-size-3xl: 1.5rem;      /* 24px */
  --font-size-4xl: 1.875rem;    /* 30px */

  /* Font weights — values reflect the weights actually cut for
   * this design system (light-dominant). Names match the numeric
   * value, not the visual impression. */
  --font-weight-light: 300;
  --font-weight-regular: 400;
  --font-weight-medium: 500;

  --line-height-tight: 1.25;
  --line-height-normal: 1.5;
  --line-height-relaxed: 1.75;

  /* ============================================================
   * App chrome heights (fixed header stack)
   * Each bar in the fixed header stack has a configured height.
   * sgo-header-container sums these to size its content placeholder.
   * ============================================================ */
  --sgo-header-height: 60px;
  --sgo-breadcrumb-height: 26px;
  --sgo-nav-strip-height: 40px;
  --sgo-feature-heading-height: 88px;

  /* ============================================================
   * Z-index
   * ============================================================ */
  --z-dropdown: 1000;
  --z-sticky: 1020;
  --z-fixed: 1030;
  --z-modal-backdrop: 1040;
  --z-modal: 1050;
  --z-popover: 1060;
  --z-tooltip: 1070;

  /* ============================================================
   * Transitions
   * ============================================================ */
  --transition-fast: 150ms ease-in-out;
  --transition-base: 200ms ease-in-out;
  --transition-slow: 300ms ease-in-out;

  /* ============================================================
   * Components — Buttons
   * ============================================================ */
  --btn-primary-text-color: var(--white);
  --btn-primary-bg-color: var(--primary);
  --btn-primary-border-color: transparent;
  --btn-primary-text-color-on: var(--white);
  --btn-primary-bg-color-on: var(--primary-light);
  --btn-primary-border-color-on: transparent;

  --btn-secondary-text-color: var(--secondary);
  --btn-secondary-bg-color: #e4e9f3;
  --btn-secondary-border-color: transparent;
  --btn-secondary-separator-color: var(--border-primary);
  --btn-secondary-text-color-on: var(--black);
  --btn-secondary-bg-color-on: #ecf0f6;
  --btn-secondary-border-color-on: transparent;
  --btn-secondary-toggle-border-color:rgba(79, 89, 121, 0.15);
  
  --btn-tertiary-text-color: var(--primary);
  --btn-tertiary-bg-color: var(--white);
  --btn-tertiary-border-color: #e4e9f3;
  --btn-tertiary-text-color-on: var(--primary-light);
  --btn-tertiary-bg-color-on: var(--white);
  --btn-tertiary-border-color-on: var(--primary);

  --btn-success-text-color: var(--white);
  --btn-success-bg-color: var(--success);
  --btn-success-border-color: transparent;
  --btn-success-text-color-on: var(--white);
  --btn-success-bg-color-on: var(--success-dark);
  --btn-success-border-color-on: transparent;

  --btn-warning-text-color: var(--color-amber);
  --btn-warning-bg-color: var(--color-amber-light);
  --btn-warning-border-color: transparent;
  --btn-warning-text-color-on: var(--color-amber);
  --btn-warning-bg-color-on: var(--color-amber-light);
  --btn-warning-border-color-on: var(--color-amber);

  --btn-danger-text-color: var(--white);
  --btn-danger-bg-color: var(--danger);
  --btn-danger-border-color: transparent;
  --btn-danger-text-color-on: var(--white);
  --btn-danger-bg-color-on: var(--danger-dark);
  --btn-danger-border-color-on: transparent;

  /* ============================================================
   * Components — Forms
   * ============================================================ */
  --form-input-border-color: #e4e9f3;
  --form-input-bg-color: var(--white);
  --form-input-disabled-bg-color: #fafafa;
  --form-input-text-color: var(--text-primary);
  --form-input-placeholder-color: #959BAF;
  --form-input-focus-border-color: var(--text-tertiary);
}