/* ==========================================================================
   Delta Gulf Consulting - Design System Variables
   ==========================================================================
   Brand Identity: Purple + Orange gradient
   Supports: Dark/Light themes, RTL/LTR
   ========================================================================== */

:root {
  /* ========================================
     BRAND COLORS (from logo)
     ======================================== */
  --brand-purple: #6B3F8C;
  --brand-purple-dark: #4A2C63;
  --brand-purple-light: #9B6EB8;
  --brand-orange: #E8735B;
  --brand-orange-dark: #C55A43;
  --brand-orange-light: #F5A491;

  /* Brand gradient - the signature */
  --brand-gradient: linear-gradient(135deg, var(--brand-orange) 0%, var(--brand-purple) 100%);
  --brand-gradient-soft: linear-gradient(135deg, rgba(232, 115, 91, 0.1) 0%, rgba(107, 63, 140, 0.1) 100%);
  --brand-gradient-reverse: linear-gradient(135deg, var(--brand-purple) 0%, var(--brand-orange) 100%);

  /* ========================================
     LIGHT THEME (default)
     ======================================== */
  --bg-primary: #FAFAF8;
  --bg-secondary: #F2F1ED;
  --bg-tertiary: #E8E6E0;
  --bg-card: #FFFFFF;
  --bg-overlay: rgba(255, 255, 255, 0.85);

  --text-primary: #1A1A1D;
  --text-secondary: #4A4A52;
  --text-tertiary: #7A7A82;
  --text-inverse: #FAFAF8;

  --border-subtle: rgba(26, 26, 29, 0.08);
  --border-default: rgba(26, 26, 29, 0.15);
  --border-strong: rgba(26, 26, 29, 0.25);

  --shadow-sm: 0 1px 2px rgba(26, 26, 29, 0.04), 0 1px 3px rgba(26, 26, 29, 0.06);
  --shadow-md: 0 4px 6px rgba(26, 26, 29, 0.05), 0 10px 15px rgba(26, 26, 29, 0.08);
  --shadow-lg: 0 10px 25px rgba(26, 26, 29, 0.08), 0 20px 40px rgba(26, 26, 29, 0.12);
  --shadow-xl: 0 20px 50px rgba(107, 63, 140, 0.15), 0 30px 60px rgba(232, 115, 91, 0.08);
  --shadow-brand: 0 10px 40px rgba(107, 63, 140, 0.25);

  --glass-bg: rgba(255, 255, 255, 0.7);
  --glass-border: rgba(255, 255, 255, 0.3);

  /* Noise texture overlay strength */
  --noise-opacity: 0.02;
}

/* ========================================
   DARK THEME
   ======================================== */
[data-theme="dark"] {
  --bg-primary: #0F0D14;
  --bg-secondary: #171420;
  --bg-tertiary: #231F30;
  --bg-card: #1A1724;
  --bg-overlay: rgba(15, 13, 20, 0.85);

  --text-primary: #F5F3F0;
  --text-secondary: #BDB8C5;
  --text-tertiary: #7A7484;
  --text-inverse: #0F0D14;

  --border-subtle: rgba(245, 243, 240, 0.06);
  --border-default: rgba(245, 243, 240, 0.12);
  --border-strong: rgba(245, 243, 240, 0.2);

  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.3), 0 1px 3px rgba(0, 0, 0, 0.4);
  --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.4), 0 10px 15px rgba(0, 0, 0, 0.5);
  --shadow-lg: 0 10px 25px rgba(0, 0, 0, 0.5), 0 20px 40px rgba(0, 0, 0, 0.6);
  --shadow-xl: 0 20px 50px rgba(107, 63, 140, 0.4), 0 30px 60px rgba(232, 115, 91, 0.15);
  --shadow-brand: 0 10px 40px rgba(107, 63, 140, 0.5);

  --glass-bg: rgba(26, 23, 36, 0.7);
  --glass-border: rgba(245, 243, 240, 0.08);

  --noise-opacity: 0.03;
}

:root {
  /* ========================================
     TYPOGRAPHY
     ======================================== */
  --font-arabic-display: 'Tajawal', 'IBM Plex Sans Arabic', system-ui, sans-serif;
  --font-arabic-body: 'IBM Plex Sans Arabic', 'Tajawal', system-ui, sans-serif;
  --font-english-display: 'Fraunces', 'Playfair Display', Georgia, serif;
  --font-english-body: 'Outfit', 'Inter', system-ui, sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', monospace;

  /* Fluid type scale using clamp */
  --text-xs: clamp(0.75rem, 0.71rem + 0.2vw, 0.875rem);
  --text-sm: clamp(0.875rem, 0.83rem + 0.22vw, 1rem);
  --text-base: clamp(1rem, 0.95rem + 0.25vw, 1.125rem);
  --text-lg: clamp(1.125rem, 1.06rem + 0.3vw, 1.25rem);
  --text-xl: clamp(1.25rem, 1.17rem + 0.4vw, 1.5rem);
  --text-2xl: clamp(1.5rem, 1.37rem + 0.6vw, 1.875rem);
  --text-3xl: clamp(1.875rem, 1.67rem + 1vw, 2.5rem);
  --text-4xl: clamp(2.5rem, 2.17rem + 1.6vw, 3.5rem);
  --text-5xl: clamp(3rem, 2.5rem + 2.5vw, 4.5rem);
  --text-6xl: clamp(3.5rem, 2.83rem + 3.3vw, 6rem);
  --text-display: clamp(4rem, 3rem + 5vw, 8rem);

  /* Line heights */
  --leading-tight: 1.1;
  --leading-snug: 1.25;
  --leading-normal: 1.5;
  --leading-relaxed: 1.75;
  --leading-loose: 2;

  /* Letter spacing */
  --tracking-tighter: -0.04em;
  --tracking-tight: -0.02em;
  --tracking-normal: 0;
  --tracking-wide: 0.025em;
  --tracking-wider: 0.05em;
  --tracking-widest: 0.15em;

  /* Font weights */
  --weight-light: 300;
  --weight-regular: 400;
  --weight-medium: 500;
  --weight-semibold: 600;
  --weight-bold: 700;
  --weight-black: 900;

  /* ========================================
     SPACING SCALE (8pt system)
     ======================================== */
  --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 */
  --space-40: 10rem;    /* 160px */

  /* Section padding (responsive) */
  --section-py: clamp(4rem, 3rem + 5vw, 8rem);
  --section-px: clamp(1.5rem, 1rem + 3vw, 4rem);

  /* Container max-widths */
  --container-sm: 640px;
  --container-md: 768px;
  --container-lg: 1024px;
  --container-xl: 1280px;
  --container-2xl: 1440px;
  --container-max: 1600px;

  /* ========================================
     RADII
     ======================================== */
  --radius-xs: 4px;
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --radius-2xl: 32px;
  --radius-full: 9999px;

  /* ========================================
     TRANSITIONS & EASINGS
     ======================================== */
  --ease-out: cubic-bezier(0.22, 1, 0.36, 1);
  --ease-in-out: cubic-bezier(0.65, 0, 0.35, 1);
  --ease-elastic: cubic-bezier(0.68, -0.55, 0.265, 1.55);
  --ease-smooth: cubic-bezier(0.4, 0, 0.2, 1);

  --duration-fast: 200ms;
  --duration-base: 350ms;
  --duration-slow: 600ms;
  --duration-slower: 1000ms;

  --transition-colors: color var(--duration-fast) var(--ease-out),
                       background-color var(--duration-fast) var(--ease-out),
                       border-color var(--duration-fast) var(--ease-out);
  --transition-transform: transform var(--duration-base) var(--ease-out);
  --transition-all: all var(--duration-base) var(--ease-out);

  /* ========================================
     Z-INDEX SCALE
     ======================================== */
  --z-base: 1;
  --z-raised: 10;
  --z-dropdown: 100;
  --z-sticky: 200;
  --z-overlay: 300;
  --z-modal: 400;
  --z-popover: 500;
  --z-toast: 600;
  --z-cursor: 9999;

  /* ========================================
     LAYOUT
     ======================================== */
  --header-height: 80px;
  --scrollbar-width: 0px;
}

/* ========================================
   REDUCED MOTION
   ======================================== */
@media (prefers-reduced-motion: reduce) {
  :root {
    --duration-fast: 0ms;
    --duration-base: 0ms;
    --duration-slow: 0ms;
    --duration-slower: 0ms;
  }
}