/* ==========================================================================
   KSS 2026 — Design Tokens ("Aotearoa Academic" Theme)
   ========================================================================== */

:root {
  /* ── Colour Palette ── */
  --color-primary:        #0B3D6B;   /* Waitemata Harbour deep water */
  --color-primary-light:  #1A6FA0;   /* Pacific Ocean / Auckland sky */
  --color-primary-dark:   #082C4D;
  --color-accent-green:   #2E8B57;   /* Pounamu (greenstone) */
  --color-accent-gold:    #D4A843;   /* Kowhai flower */
  --color-accent-warm:    #C4683C;   /* Rangitoto volcanic earth */

  /* Neutrals */
  --color-white:          #FFFFFF;
  --color-off-white:      #F7F9FC;
  --color-light-grey:     #E8ECF1;
  --color-mid-grey:       #8896A7;
  --color-dark-grey:      #3A4553;
  --color-near-black:     #1A1F27;

  /* Semantic */
  --color-body-bg:        var(--color-off-white);
  --color-surface:        var(--color-white);
  --color-text:           var(--color-near-black);
  --color-text-muted:     var(--color-mid-grey);
  --color-border:         var(--color-light-grey);
  --color-link:           var(--color-primary-light);
  --color-link-hover:     var(--color-primary);

  /* ── Typography ── */
  --font-heading:  'Montserrat', sans-serif;
  --font-body:     'Open Sans', sans-serif;

  --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:  2rem;       /* 32px */
  --fs-3xl:  2.5rem;     /* 40px */
  --fs-4xl:  3rem;       /* 48px */
  --fs-5xl:  3.5rem;     /* 56px */

  --fw-regular:   400;
  --fw-medium:    500;
  --fw-semibold:  600;
  --fw-bold:      700;
  --fw-extrabold: 800;

  --lh-tight:   1.2;
  --lh-snug:    1.35;
  --lh-normal:  1.6;
  --lh-relaxed: 1.75;

  /* ── Spacing Scale ── */
  --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 */

  /* ── Layout ── */
  --container-max:   1200px;
  --container-narrow: 800px;

  /* ── Borders & Radii ── */
  --radius-sm:  4px;
  --radius-md:  8px;
  --radius-lg:  12px;
  --radius-xl:  16px;
  --radius-full: 9999px;

  /* ── Shadows ── */
  --shadow-sm:  0 1px 3px rgba(11,61,107,0.08);
  --shadow-md:  0 4px 12px rgba(11,61,107,0.10);
  --shadow-lg:  0 8px 30px rgba(11,61,107,0.12);
  --shadow-xl:  0 16px 48px rgba(11,61,107,0.15);

  /* ── Transitions ── */
  --transition-fast:   150ms ease;
  --transition-base:   250ms ease;
  --transition-slow:   400ms ease;

  /* ── Z-index ── */
  --z-dropdown:  100;
  --z-sticky:    200;
  --z-overlay:   300;
  --z-modal:     400;
}