/*
  Design System — 8px Grid
  Base unit: 8px
  All spacing = multiples of 8px
  Font: Space Grotesk (heading) + Archivo (body)
*/

:root {
  /* =====================
     COLORS
  ===================== */
  --color-bg:             #ffffff;
  --color-surface:        #f8fafc;
  --color-surface-2:      #f1f5f9;
  --color-border:         #e2e8f0;
  --color-border-subtle:  #f1f5f9;

  --color-text-heading:   #0f172a;
  --color-text-body:      #334155;
  --color-text-muted:     #64748b;
  --color-text-inverse:   #ffffff;

  --color-accent-1:       #1e3a8a;
  --color-accent-2:       #3b82f6;
  --color-accent-3:       #93c5fd;

  --color-pill-bg:        #eff6ff;
  --color-pill-text:      #1e3a8a;

  /* =====================
     GRADIENTS
  ===================== */
  --gradient-hero:
    radial-gradient(at 15% 25%, hsla(213, 94%, 68%, 0.35) 0px, transparent 55%),
    radial-gradient(at 85%  8%, hsla(204, 80%, 80%, 0.40) 0px, transparent 50%),
    radial-gradient(at 65% 85%, hsla(221, 70%, 50%, 0.22) 0px, transparent 50%),
    radial-gradient(at  5% 80%, hsla(199, 85%, 88%, 0.35) 0px, transparent 50%),
    #ffffff;
  --gradient-text: linear-gradient(90deg, #1e3a8a, #3b82f6);
  --gradient-btn:  linear-gradient(135deg, #1e3a8a, #3b82f6);

  /* =====================
     TYPOGRAPHY
     Heading: Space Grotesk — distinctive, modern
     Body:    Archivo — clean, legible
  ===================== */
  --font-heading: 'Space Grotesk', system-ui, sans-serif;
  --font-body:    'Archivo', system-ui, sans-serif;

  /* Type scale (major third — 1.25×) */
  --text-xs:   0.875rem;   /* 14px */
  --text-sm:   1rem;       /* 16px */
  --text-base: 1rem;       /* 16px */
  --text-lg:   1.125rem;   /* 18px */
  --text-xl:   1.25rem;    /* 20px */
  --text-2xl:  1.5rem;     /* 24px */
  --text-3xl:  1.875rem;   /* 30px */
  --text-4xl:  2.25rem;    /* 36px */
  --text-5xl:  3rem;       /* 48px */
  --text-6xl:  3.75rem;    /* 60px */
  --text-7xl:  4.5rem;     /* 72px */

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

  --leading-tight:  1.1;
  --leading-snug:   1.3;
  --leading-normal: 1.6;
  --leading-relaxed:1.75;

  --tracking-tight:  -0.03em;
  --tracking-normal:  0;
  --tracking-wide:    0.04em;
  --tracking-wider:   0.08em;
  --tracking-widest:  0.12em;

  /* =====================
     SPACING — 8px grid
     --space-N = N × 8px
  ===================== */
  --space-px:  1px;
  --space-0:   0px;
  --space-1:   8px;    /* 1 × 8 */
  --space-2:   16px;   /* 2 × 8 */
  --space-3:   24px;   /* 3 × 8 */
  --space-4:   32px;   /* 4 × 8 */
  --space-5:   40px;   /* 5 × 8 */
  --space-6:   48px;   /* 6 × 8 */
  --space-7:   56px;   /* 7 × 8 */
  --space-8:   64px;   /* 8 × 8 */
  --space-10:  80px;   /* 10 × 8 */
  --space-12:  96px;   /* 12 × 8 */
  --space-14:  112px;  /* 14 × 8 */
  --space-16:  128px;  /* 16 × 8 */
  --space-20:  160px;  /* 20 × 8 */
  --space-24:  192px;  /* 24 × 8 */
  --space-32:  256px;  /* 32 × 8 */

  /* Semantic aliases */
  --gap-xs:     var(--space-1);   /* 8px  — inline gaps, icon spacing */
  --gap-sm:     var(--space-2);   /* 16px — tight component gaps */
  --gap-md:     var(--space-3);   /* 24px — standard gaps */
  --gap-lg:     var(--space-4);   /* 32px — card/section internal */
  --gap-xl:     var(--space-6);   /* 48px — between major blocks */
  --gap-2xl:    var(--space-8);   /* 64px — section dividers */

  --section-sm:  var(--space-8);   /* 64px  — tight sections */
  --section-md:  var(--space-12);  /* 96px  — standard sections */
  --section-lg:  var(--space-16);  /* 128px — hero/feature sections */

  /* =====================
     LAYOUT
  ===================== */
  --container-max:     1120px;
  --container-padding: var(--space-3);  /* 24px gutter */

  /* =====================
     BORDERS & RADIUS
     All multiples of 4px
  ===================== */
  --radius-sm:   4px;
  --radius-md:   8px;
  --radius-lg:   16px;
  --radius-xl:   24px;
  --radius-full: 9999px;

  /* =====================
     SHADOWS
  ===================== */
  --shadow-xs:   0 1px 2px rgba(0,0,0,0.05);
  --shadow-sm:   0 1px 3px rgba(0,0,0,0.06), 0 1px 2px rgba(0,0,0,0.04);
  --shadow-card: 0 1px 3px rgba(0,0,0,0.06), 0 4px 16px rgba(0,0,0,0.06);
  --shadow-card-hover: 0 4px 12px rgba(0,0,0,0.08), 0 12px 32px rgba(0,0,0,0.1);

  /* =====================
     TRANSITIONS
  ===================== */
  --transition-fast:   150ms ease;
  --transition:        200ms ease;
  --transition-slow:   350ms ease;
}

@media (max-width: 768px) {
  :root {
    --text-sm:   0.875rem;   /* 14px on mobile */
    --text-base: 0.875rem;   /* 14px on mobile */
  }
}