/* ============================================
   TAADAA Design System — CSS Custom Properties
   ============================================ */

:root {
  /* ── Brand Colors ── */
  --color-primary:        #1C3FBF;
  --color-primary-rgb:    28, 63, 191;
  --color-primary-dark:   #0D1F6E;
  --color-primary-darker: #081450;
  --color-primary-light:  #2E56E0;
  --color-primary-lighter:#4A70F5;
  --color-primary-subtle: #E8EDFB;

  --color-white:          #FCFEFD;
  --color-white-rgb:      252, 254, 253;

  --color-highlight:      #FFDA67;
  --color-highlight-rgb:  255, 218, 103;
  --color-highlight-dark: #E5C044;
  --color-highlight-light:#FFE89A;
  --color-highlight-subtle:#FFF8E1;

  /* ── Neutral Palette ── */
  --color-gray-50:   #FAFAFA;
  --color-gray-100:  #F5F3EE;
  --color-gray-200:  #E8E6E1;
  --color-gray-300:  #D1CFC9;
  --color-gray-400:  #9CA3AF;
  --color-gray-500:  #6B7280;
  --color-gray-600:  #4B5563;
  --color-gray-700:  #374151;
  --color-gray-800:  #1F2937;
  --color-gray-900:  #1A1A2E;

  /* ── Semantic Colors ── */
  --color-success:   #10B981;
  --color-success-subtle: #D1FAE5;
  --color-error:     #EF4444;
  --color-error-subtle: #FEE2E2;
  --color-warning:   #F59E0B;
  --color-info:      #3B82F6;

  /* ── Background Colors ── */
  --bg-primary:      var(--color-white);
  --bg-warm:         var(--color-gray-100);
  --bg-dark:         var(--color-primary-dark);

  /* ── Text Colors ── */
  --text-primary:    var(--color-gray-900);
  --text-secondary:  var(--color-gray-500);
  --text-muted:      var(--color-gray-400);
  --text-on-primary: var(--color-white);
  --text-on-dark:    rgba(255, 255, 255, 0.85);

  /* ── Gradients ── */
  --gradient-hero:      linear-gradient(135deg, #1C3FBF 0%, #0D1F6E 100%);
  --gradient-hero-radial: radial-gradient(ellipse at 30% 50%, rgba(46, 86, 224, 0.4) 0%, transparent 70%);
  --gradient-premium:   linear-gradient(135deg, #1C3FBF 0%, #2E56E0 50%, #1C3FBF 100%);
  --gradient-warm:      linear-gradient(135deg, #FFDA67 0%, #FFE89A 100%);
  --gradient-warm-subtle: linear-gradient(135deg, #FFF8E1 0%, #FFFDF5 100%);
  --gradient-dark:      linear-gradient(180deg, #0D1F6E 0%, #081450 100%);
  --gradient-glass:     linear-gradient(135deg, rgba(255,255,255,0.1) 0%, rgba(255,255,255,0.05) 100%);
  --gradient-card:      linear-gradient(180deg, rgba(255,255,255,0) 0%, rgba(255,255,255,0.8) 100%);
  --gradient-text:      linear-gradient(135deg, #1C3FBF 0%, #2E56E0 100%);

  /* ── Typography ── */
  --font-logo:       'Archivo Black', sans-serif;
  --font-heading:    'Archivo Black', sans-serif;
  --font-body:       'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-mono:       'JetBrains Mono', 'Fira Code', monospace;

  /* Fluid type scale */
  --text-xs:    clamp(0.6875rem, 0.65rem + 0.15vw, 0.75rem);     /* 11–12px */
  --text-sm:    clamp(0.8125rem, 0.78rem + 0.15vw, 0.875rem);    /* 13–14px */
  --text-base:  clamp(0.9375rem, 0.9rem + 0.2vw, 1rem);          /* 15–16px */
  --text-lg:    clamp(1.0625rem, 1rem + 0.3vw, 1.125rem);        /* 17–18px */
  --text-xl:    clamp(1.1875rem, 1.1rem + 0.4vw, 1.25rem);       /* 19–20px */
  --text-2xl:   clamp(1.4375rem, 1.3rem + 0.6vw, 1.5rem);        /* 23–24px */
  --text-3xl:   clamp(1.75rem, 1.5rem + 1vw, 1.875rem);          /* 28–30px */
  --text-4xl:   clamp(2rem, 1.6rem + 1.6vw, 2.25rem);            /* 32–36px */
  --text-5xl:   clamp(2.5rem, 2rem + 2vw, 3rem);                 /* 40–48px */
  --text-6xl:   clamp(3rem, 2.2rem + 3vw, 3.75rem);              /* 48–60px */
  --text-7xl:   clamp(3.5rem, 2.5rem + 4vw, 5rem);               /* 56–80px */

  --leading-tight:    1.1;
  --leading-snug:     1.25;
  --leading-normal:   1.5;
  --leading-relaxed:  1.65;

  --tracking-tight:   -0.025em;
  --tracking-normal:  0;
  --tracking-wide:    0.025em;
  --tracking-wider:   0.05em;
  --tracking-widest:  0.15em;
  --tracking-ultra:   0.3em;

  --weight-normal:    400;
  --weight-medium:    500;
  --weight-semibold:  600;
  --weight-bold:      700;
  --weight-extrabold: 800;
  --weight-black:     900;

  /* ── Spacing ── */
  --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 */
  --space-32:  8rem;      /* 128px */

  --section-padding: clamp(4rem, 8vw, 7rem);
  --container-max:   72rem;                    /* 1152px */
  --container-narrow: 48rem;                   /* 768px */
  --container-px:    clamp(1.5rem, 4vw, 3rem);

  /* ── Border Radius ── */
  --radius-sm:    0.5rem;    /* 8px */
  --radius-md:    0.75rem;   /* 12px */
  --radius-lg:    1rem;      /* 16px */
  --radius-xl:    1.5rem;    /* 24px */
  --radius-2xl:   2rem;      /* 32px */
  --radius-full:  9999px;

  /* ── Shadows ── */
  --shadow-xs:    0 1px 2px rgba(0,0,0,0.04);
  --shadow-sm:    0 2px 8px rgba(0,0,0,0.06);
  --shadow-md:    0 4px 16px rgba(0,0,0,0.08);
  --shadow-lg:    0 8px 32px rgba(0,0,0,0.1);
  --shadow-xl:    0 16px 48px rgba(0,0,0,0.12);
  --shadow-2xl:   0 24px 64px rgba(0,0,0,0.16);
  --shadow-inner: inset 0 2px 4px rgba(0,0,0,0.06);
  --shadow-glow:  0 0 20px rgba(28, 63, 191, 0.3);
  --shadow-highlight: 0 0 20px rgba(255, 218, 103, 0.4);
  --shadow-card:  0 1px 3px rgba(0,0,0,0.04), 0 8px 24px rgba(0,0,0,0.06);
  --shadow-card-hover: 0 4px 12px rgba(0,0,0,0.06), 0 16px 40px rgba(0,0,0,0.1);

  /* ── Transitions ── */
  --ease-out:     cubic-bezier(0.16, 1, 0.3, 1);
  --ease-in-out:  cubic-bezier(0.65, 0, 0.35, 1);
  --ease-spring:  cubic-bezier(0.34, 1.56, 0.64, 1);
  --ease-smooth:  cubic-bezier(0.4, 0, 0.2, 1);

  --duration-fast:    150ms;
  --duration-normal:  300ms;
  --duration-slow:    500ms;
  --duration-slower:  700ms;

  --transition-fast:    all 150ms var(--ease-smooth);
  --transition-normal:  all 300ms var(--ease-out);
  --transition-slow:    all 500ms var(--ease-out);
  --transition-colors:  color 200ms, background-color 200ms, border-color 200ms;

  /* ── Z-Index Scale ── */
  --z-base:      1;
  --z-dropdown:  10;
  --z-sticky:    20;
  --z-fixed:     30;
  --z-overlay:   40;
  --z-modal:     50;
  --z-toast:     60;
  --z-tooltip:   70;

  /* ── Misc ── */
  --blur-sm:     4px;
  --blur-md:     8px;
  --blur-lg:     16px;
  --blur-xl:     24px;
}