/* ============================================
   CUSTOM PROPERTIES - CSS Variables
   ============================================ */

:root {
  /* ====== BREAKPOINTS ====== */
  --breakpoint-sm: 640px;
  --breakpoint-md: 768px;
  --breakpoint-lg: 1024px;
  --breakpoint-xl: 1280px;
  --breakpoint-2xl: 1536px;

  /* ====== SPACING SCALE ====== */
  --space-xs: 0.25rem;    /* 4px */
  --space-sm: 0.5rem;     /* 8px */
  --space-md: 1rem;       /* 16px */
  --space-lg: 1.5rem;     /* 24px */
  --space-xl: 2rem;       /* 32px */
  --space-2xl: 3rem;      /* 48px */
  --space-3xl: 4rem;      /* 64px */
  --space-4xl: 6rem;      /* 96px */
  --space-5xl: 8rem;      /* 128px */

  /* ====== FONT SIZES ====== */
  --text-xs: 0.75rem;     /* 12px */
  --text-sm: 0.875rem;    /* 14px */
  --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 */

  /* ====== COMPONENT SIZES ====== */
  --logo-size-sm: 8rem;   /* 128px */
  --logo-size-md: 12rem;  /* 192px */
  --logo-size-lg: 18rem;  /* 288px */
  
  --icon-size-xs: 0.75rem; /* 12px */
  --icon-size-sm: 1rem;    /* 16px */
  --icon-size-md: 1.5rem;  /* 24px */
  --icon-size-lg: 2rem;    /* 32px */
  --icon-size-xl: 2.5rem;  /* 40px */

  /* ====== CONTAINER SIZES ====== */
  --container-sm: 640px;
  --container-md: 768px;
  --container-lg: 1024px;
  --container-xl: 1280px;
  --container-main: 1200px;
  --container-content: 1100px;
  --container-testimonials: 1000px;
  --container-timeline: 900px;

  /* ====== BORDER RADIUS ====== */
  --radius-sm: 0.125rem;  /* 2px */
  --radius-md: 0.375rem;  /* 6px */
  --radius-lg: 0.5rem;    /* 8px */
  --radius-xl: 0.75rem;   /* 12px */
  --radius-2xl: 1rem;     /* 16px */
  --radius-3xl: 1.5rem;   /* 24px */
  --radius-full: 9999px;

  /* ====== ANIMATIONS ====== */
  --transition-fast: 150ms ease;
  --transition-normal: 300ms ease;
  --transition-slow: 500ms ease;
  
  --animation-fade: fadeIn 0.6s ease-out;
  --animation-slide-up: slideUp 0.6s ease-out;
  --animation-scale: scaleIn 0.6s ease-out;

  /* ====== Z-INDEX SCALE ====== */
  --z-behind: -1;
  --z-base: 0;
  --z-elevated: 10;
  --z-sticky: 20;
  --z-overlay: 30;
  --z-modal: 40;
  --z-popover: 50;
  --z-tooltip: 60;
}

/* ====== RESPONSIVE CUSTOM PROPERTIES ====== */
@media (max-width: 767px) {
  :root {
    --logo-size-responsive: var(--logo-size-sm);
    --icon-size-responsive: var(--icon-size-sm);
    --text-responsive: var(--text-sm);
    --space-responsive: var(--space-md);
  }
}

@media (min-width: 768px) and (max-width: 1023px) {
  :root {
    --logo-size-responsive: var(--logo-size-md);
    --icon-size-responsive: var(--icon-size-md);
    --text-responsive: var(--text-base);
    --space-responsive: var(--space-lg);
  }
}

@media (min-width: 1024px) {
  :root {
    --logo-size-responsive: var(--logo-size-lg);
    --icon-size-responsive: var(--icon-size-lg);
    --text-responsive: var(--text-lg);
    --space-responsive: var(--space-xl);
  }
}