/**
 * Dr. Anil Kumar's Eye Hospital ("drakeh") Design Tokens
 * =======================================================
 * Palette calibrated from reference screenshot (Drakeh_-_template-3.png):
 *
 *   --color-navy-900:            #072E48 (Footer background, dark feature section)
 *   --color-navy-800:            #0B3B5C (Navy dark surface / card dark)
 *   --color-blue-600:            #0565E6 (Primary CTA button, vibrant royal blue)
 *   --color-blue-wordmark:       #1A6BE2 (Wordmark blue in header, crisp definition)
 *   --color-blue-700:            #0452BA (Primary CTA hover state)
 *   --color-blue-800:            #034196 (Primary CTA active/pressed state)
 *   --color-blue-50:             #EEF5FD (Subtle blue-tinted badges / highlights)
 *   --color-green-accent-dark:   #22802D (Green accent bar on navy/dark backgrounds)
 *   --color-green-accent-light:  #3EB828 (Green accent bar / active indicator on white)
 *   --color-green-500:           #3EB828 (Clinical accent default, aliases green-accent-light)
 *   --color-green-600:           #1D6E2D (Clinical accent hover / footer text)
 *   --color-bg:                  #FFFFFF (Base white page background)
 *   --color-bg-alt:              #EEF3F8 (Main soft blue-grey alternating section background)
 *   --color-bg-alt-light:        #EBF5FE (Lighter icy blue section background)
 *   --color-heading:             #081C36 (Deep midnight navy for editorial serif headings)
 *   --color-text:                #1E293B (Primary readable slate body text, WCAG AAA)
 *   --color-text-muted:          #64748B (Secondary metadata, captions & eyebrow labels)
 *   --color-border:              #E2E8F0 (Default container and card borders)
 *   --color-border-subtle:       #EDF2F7 (Subtle dividers)
 *
 * Breakpoint Reference:
 *   mobile:   < 640px
 *   tablet:   640px - 1024px
 *   desktop:  > 1024px
 *   wide:     > 1440px
 */

:root {
  /* --------------------------------------------------------------------------
   * Colour Tokens
   * ----------------------------------------------------------------------- */
  --color-navy-900: #072E48;
  --color-navy-800: #0B3B5C;

  --color-blue-600: #0565E6;
  --color-blue-wordmark: #1A6BE2;
  --color-blue-700: #0452BA;
  --color-blue-800: #034196;
  --color-blue-50: #EEF5FD;

  --color-green-accent-dark: #22802D;
  --color-green-accent-light: #3EB828;
  --color-green-500: var(--color-green-accent-light);
  --color-green-600: #1D6E2D;

  --color-bg: #FFFFFF;
  --color-bg-alt: #EEF3F8;
  --color-bg-alt-light: #EBF5FE;

  --color-heading: #081C36;
  --color-text: #1E293B;
  --color-text-muted: #64748B;
  --color-border: #E2E8F0;
  --color-border-subtle: #EDF2F7;

  /* --------------------------------------------------------------------------
   * Typography Tokens
   * ----------------------------------------------------------------------- */
  --font-display: 'Newsreader', Georgia, 'Times New Roman', serif;
  --font-body: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;

  /* Modular Font Size Scale */
  --fs-xs: 0.75rem;    /* 12px */
  --fs-sm: 0.875rem;   /* 14px */
  --fs-base: 1rem;     /* 16px */
  --fs-md: 1.125rem;   /* 18px */
  --fs-lg: 1.25rem;    /* 20px */
  --fs-xl: 1.5rem;     /* 24px */
  --fs-2xl: 1.875rem;  /* 30px */
  --fs-3xl: 2.25rem;   /* 36px */
  --fs-4xl: 3rem;      /* 48px */
  --fs-5xl: 3.75rem;   /* 60px */

  /* Line Heights */
  --lh-tight: 1.15;
  --lh-snug: 1.3;
  --lh-normal: 1.55;
  --lh-relaxed: 1.7;

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

  /* --------------------------------------------------------------------------
   * Spacing Scale (4px/8px Base Grid)
   * ----------------------------------------------------------------------- */
  --space-1: 0.25rem;  /* 4px */
  --space-2: 0.5rem;   /* 8px */
  --space-3: 0.75rem;  /* 12px */
  --space-4: 1rem;     /* 16px */
  --space-5: 1.25rem;  /* 20px */
  --space-6: 1.5rem;   /* 24px */
  --space-8: 2rem;     /* 32px */
  --space-10: 2.5rem;  /* 40px */
  --space-12: 3rem;    /* 48px */
  --space-16: 4rem;    /* 64px */
  --space-20: 5rem;    /* 80px */
  --space-24: 6rem;    /* 96px */

  /* --------------------------------------------------------------------------
   * Border Radius Tokens
   * ----------------------------------------------------------------------- */
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 14px;
  --radius-xl: 20px;
  --radius-full: 9999px;

  /* --------------------------------------------------------------------------
   * Elevation / Box Shadows
   * ----------------------------------------------------------------------- */
  --shadow-sm: 0 1px 2px 0 rgba(11, 31, 51, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(11, 31, 51, 0.08), 0 2px 4px -2px rgba(11, 31, 51, 0.04);
  --shadow-lg: 0 10px 15px -3px rgba(11, 31, 51, 0.08), 0 4px 6px -4px rgba(11, 31, 51, 0.03);

  /* Transitions */
  --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-base: 250ms cubic-bezier(0.4, 0, 0.2, 1);
}