/* ============================================
   OMAR PORTFOLIO - DESIGN SYSTEM
   CSS Variables & Theme Engine
   ============================================ */

@import url('https://fonts.googleapis.com/css2?family=Syne:wght@400;500;600;700;800&family=Noto+Kufi+Arabic:wght@300;400;500;600;700;800&family=Manrope:wght@300;400;500;600;700;800&display=swap');

/* ---- LIGHT MODE (DEFAULT) ---- */
:root {
  /* Backgrounds */
  --bg-base:        #F8FAFC;
  --bg-surface:     #FFFFFF;
  --bg-elevated:    #F1F5F9;
  --bg-overlay:     rgba(255,255,255,0.85);

  /* Text */
  --text-primary:   #0F172A;
  --text-secondary: #475569;
  --text-muted:     #94A3B8;
  --text-inverse:   #FFFFFF;

  /* Accent Colors */
  --accent-blue:    #2563EB;
  --accent-indigo:  #4F46E5;
  --accent-cyan:    #0EA5E9;
  --accent-violet:  #7C3AED;
  --accent-emerald: #059669;

  /* Brand Gradient */
  --gradient-primary: linear-gradient(135deg, #2563EB 0%, #4F46E5 50%, #7C3AED 100%);
  --gradient-subtle:  linear-gradient(135deg, #EFF6FF 0%, #EDE9FE 100%);
  --gradient-card:    linear-gradient(145deg, #FFFFFF 0%, #F8FAFC 100%);
  --gradient-mesh:    radial-gradient(at 40% 20%, hsla(228,80%,85%,0.3) 0px, transparent 50%),
                      radial-gradient(at 80% 0%, hsla(265,80%,85%,0.2) 0px, transparent 50%),
                      radial-gradient(at 0% 50%, hsla(199,80%,85%,0.2) 0px, transparent 50%);

  /* Borders */
  --border-light:   #E2E8F0;
  --border-medium:  #CBD5E1;
  --border-accent:  rgba(37, 99, 235, 0.2);

  /* Shadows */
  --shadow-xs:      0 1px 2px rgba(15,23,42,0.04);
  --shadow-sm:      0 2px 8px rgba(15,23,42,0.06), 0 1px 2px rgba(15,23,42,0.04);
  --shadow-md:      0 4px 16px rgba(15,23,42,0.08), 0 2px 4px rgba(15,23,42,0.04);
  --shadow-lg:      0 8px 32px rgba(15,23,42,0.10), 0 4px 8px rgba(15,23,42,0.05);
  --shadow-xl:      0 20px 60px rgba(15,23,42,0.12), 0 8px 16px rgba(15,23,42,0.06);
  --shadow-accent:  0 8px 32px rgba(37,99,235,0.2);
  --shadow-glow:    0 0 40px rgba(79,70,229,0.15);

  /* Spacing */
  --space-1:  0.25rem;
  --space-2:  0.5rem;
  --space-3:  0.75rem;
  --space-4:  1rem;
  --space-5:  1.25rem;
  --space-6:  1.5rem;
  --space-8:  2rem;
  --space-10: 2.5rem;
  --space-12: 3rem;
  --space-16: 4rem;
  --space-20: 5rem;
  --space-24: 6rem;
  --space-32: 8rem;

  /* Border Radius */
  --radius-sm:   6px;
  --radius-md:   12px;
  --radius-lg:   18px;
  --radius-xl:   24px;
  --radius-2xl:  32px;
  --radius-full: 9999px;

  /* Typography */
  --font-display:  'Syne', sans-serif;
  --font-body:     'Manrope', sans-serif;
  --font-arabic:   'Noto Kufi Arabic', sans-serif;

  /* Font Sizes */
  --text-xs:   0.75rem;
  --text-sm:   0.875rem;
  --text-base: 1rem;
  --text-lg:   1.125rem;
  --text-xl:   1.25rem;
  --text-2xl:  1.5rem;
  --text-3xl:  1.875rem;
  --text-4xl:  2.25rem;
  --text-5xl:  3rem;
  --text-6xl:  3.75rem;
  --text-7xl:  4.5rem;

  /* Transitions */
  --transition-fast:   150ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-base:   250ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow:   400ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-spring: 500ms cubic-bezier(0.34, 1.56, 0.64, 1);

  /* Z-Index */
  --z-base:    0;
  --z-above:   10;
  --z-overlay: 100;
  --z-modal:   200;
  --z-toast:   300;
  --z-header:  1000;
  --z-cursor:  9999;

  /* Container */
  --container-max: 1280px;
  --container-pad: clamp(1rem, 4vw, 2.5rem);

  /* Header */
  --header-height: 72px;
}

/* ---- DARK MODE ---- */
[data-theme="dark"] {
  --bg-base:        #080C14;
  --bg-surface:     #0F172A;
  --bg-elevated:    #1E293B;
  --bg-overlay:     rgba(15,23,42,0.90);

  --text-primary:   #F1F5F9;
  --text-secondary: #94A3B8;
  --text-muted:     #475569;
  --text-inverse:   #0F172A;

  --border-light:   #1E293B;
  --border-medium:  #334155;
  --border-accent:  rgba(99, 148, 255, 0.2);

  --shadow-xs:      0 1px 2px rgba(0,0,0,0.2);
  --shadow-sm:      0 2px 8px rgba(0,0,0,0.25);
  --shadow-md:      0 4px 16px rgba(0,0,0,0.30);
  --shadow-lg:      0 8px 32px rgba(0,0,0,0.35);
  --shadow-xl:      0 20px 60px rgba(0,0,0,0.4);
  --shadow-accent:  0 8px 32px rgba(79,70,229,0.3);
  --shadow-glow:    0 0 60px rgba(79,70,229,0.25);

  --gradient-subtle:  linear-gradient(135deg, #0F172A 0%, #1E1B4B 100%);
  --gradient-card:    linear-gradient(145deg, #0F172A 0%, #131C2E 100%);
  --gradient-mesh:    radial-gradient(at 40% 20%, hsla(228,80%,20%,0.4) 0px, transparent 50%),
                      radial-gradient(at 80% 0%, hsla(265,80%,20%,0.3) 0px, transparent 50%),
                      radial-gradient(at 0% 50%, hsla(199,80%,20%,0.3) 0px, transparent 50%);
}

/* ---- ARABIC RTL ---- */
[lang="ar"] {
  font-family: var(--font-arabic);
  direction: rtl;
  text-align: right;
}

[lang="ar"] .font-display {
  font-family: var(--font-arabic);
}