:root {
  /* Color Palette — Dark Industrial */
  --color-bg-primary:      #0a0a0f;
  --color-bg-secondary:    #12121a;
  --color-bg-tertiary:     #1a1a2e;
  --color-bg-card:         #16161f;
  --color-surface:         #1e1e2a;

  --color-text-primary:    #e8e8ed;
  --color-text-secondary:  #9a9ab0;
  --color-text-muted:      #5a5a6e;

  --color-accent:          #f47521;
  --color-accent-hover:    #ff8c3a;
  --color-accent-glow:     rgba(244, 117, 33, 0.3);
  --color-steel:           #4a90d9;
  --color-steel-hover:     #5ea3ec;

  --color-border:          rgba(255,255,255,0.06);
  --color-border-hover:    rgba(255,255,255,0.12);
  --color-success:         #2ecc71;
  --color-error:           #e74c3c;

  /* Typography */
  --font-heading:    'Rajdhani', sans-serif;
  --font-body:       'Inter', sans-serif;
  --font-mono:       'Space Mono', monospace;

  --fs-hero:     clamp(2.5rem, 6vw, 5rem);
  --fs-h1:       clamp(2rem, 4vw, 3.5rem);
  --fs-h2:       clamp(1.5rem, 3vw, 2.5rem);
  --fs-h3:       clamp(1.25rem, 2vw, 1.75rem);
  --fs-h4:       clamp(1.1rem, 1.5vw, 1.35rem);
  --fs-body:     clamp(0.95rem, 1.2vw, 1.1rem);
  --fs-small:    clamp(0.8rem, 1vw, 0.9rem);

  --fw-light:    300;
  --fw-regular:  400;
  --fw-medium:   500;
  --fw-semibold: 600;
  --fw-bold:     700;

  /* Spacing */
  --space-xs:  0.5rem;
  --space-sm:  1rem;
  --space-md:  1.5rem;
  --space-lg:  2.5rem;
  --space-xl:  4rem;
  --space-2xl: 6rem;
  --space-3xl: 8rem;

  /* Layout */
  --container-max:   1200px;
  --container-wide:  1400px;
  --container-pad:   clamp(1rem, 4vw, 2rem);
  --header-height:   80px;

  /* Transitions */
  --transition-fast:   200ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-base:   350ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow:   600ms cubic-bezier(0.4, 0, 0.2, 1);

  /* Borders & Shadows */
  --radius-sm:  4px;
  --radius-md:  8px;
  --radius-lg:  12px;
  --shadow-card:  0 4px 24px rgba(0,0,0,0.3);
  --shadow-hover: 0 8px 40px rgba(0,0,0,0.5);
}