:root {
  /* === CORES PRIMÁRIAS === */
  --color-bg-base:        #0A0F1C;
  --color-bg-surface:     #0F1629;
  --color-bg-elevated:    #1E293B;
  --color-bg-subtle:      #162032;

  /* === NEON / ACCENT === */
  --color-neon:           #00E5FF;
  --color-neon-dim:       #00B8CC;
  --color-neon-ultra:     #00F0FF;
  --color-cyan-mid:       #00A3C4;
  --color-cyan-soft:      #0891B2;

  /* === TEXTO === */
  --color-text-primary:   #F5F7FA;
  --color-text-secondary: #94A3B8;
  --color-text-muted:     #64748B;
  --color-text-inverse:   #0A0F1C;

  /* === BORDAS === */
  --color-border-default: rgba(0, 229, 255, 0.10);
  --color-border-hover:   rgba(0, 229, 255, 0.25);
  --color-border-active:  rgba(0, 229, 255, 0.50);
  --color-border-subtle:  rgba(255, 255, 255, 0.05);

  /* === GRADIENTES === */
  --gradient-hero:        linear-gradient(135deg, #0A0F1C 0%, #0F2040 50%, #0A0F1C 100%);
  --gradient-neon-glow:   linear-gradient(135deg, #00E5FF 0%, #0891B2 100%);
  --gradient-card:        linear-gradient(145deg, #0F1629 0%, #162032 100%);
  --gradient-section-alt: linear-gradient(180deg, #0A0F1C 0%, #0D1930 50%, #0A0F1C 100%);

  /* === SOMBRAS === */
  --shadow-card:          0 4px 24px rgba(0, 0, 0, 0.40);
  --shadow-card-hover:    0 8px 40px rgba(0, 229, 255, 0.12);
  --shadow-neon-sm:       0 0 12px rgba(0, 229, 255, 0.35);
  --shadow-neon-md:       0 0 24px rgba(0, 229, 255, 0.25), 0 0 60px rgba(0, 229, 255, 0.10);
  --shadow-neon-lg:       0 0 40px rgba(0, 229, 255, 0.30), 0 0 100px rgba(0, 229, 255, 0.12);
  --shadow-button:        0 4px 20px rgba(0, 229, 255, 0.30);
  --shadow-button-hover:  0 6px 30px rgba(0, 229, 255, 0.50);

  /* === STATUS === */
  --color-success:        #10B981;
  --color-success-dim:    rgba(16, 185, 129, 0.15);
  --color-warning:        #F59E0B;
  --color-warning-dim:    rgba(245, 158, 11, 0.15);
  --color-error:          #EF4444;
  --color-error-dim:      rgba(239, 68, 68, 0.15);

  /* === TIPOGRAFIA === */
  --font-display: 'Sora', sans-serif;
  --font-body:    'DM Sans', sans-serif;

  /* Tamanhos */
  --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;

  /* Line heights */
  --leading-tight:   1.2;
  --leading-snug:    1.35;
  --leading-normal:  1.5;
  --leading-relaxed: 1.65;

  /* Letter spacing */
  --tracking-tight:  -0.03em;
  --tracking-normal:  0em;
  --tracking-wide:    0.06em;
  --tracking-wider:   0.12em;

  /* === ESPAÇAMENTO === */
  --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;

  --container-max:     1200px;
  --container-narrow:  760px;
  --container-px:      1.5rem;
  --section-py:        5rem;
  --section-py-mobile: 3rem;

  /* === NAVIGATION === */
  --sidebar-width:        260px;  /* desktop fixed */
  --sidebar-drawer-width: 288px;  /* mobile drawer / tablet expanded */
  --sidebar-rail-width:   72px;   /* tablet rail */
  --topbar-height:        56px;
  --bottomnav-height:     68px;

  /* === BRAND LOGO === */
  --logo-sidebar-height:      38px;
  --logo-topbar-height:       31px;
  --logo-loader-width:        144px;
  --logo-sidebar-rail-height: 28px;

  /* === Z-INDEX SCALE === */
  --z-base:        1;
  --z-sticky:      10;
  --z-sidebar:     30;
  --z-bottomnav:   60;
  --z-topbar:      70;
  --z-overlay:     80;
  --z-drawer:      90;
  --z-toast:       100;
  --z-modal:       110;
}