:root {
  --clr-navy-900: #0f172a;
  --clr-navy-800: #1e293b;
  --clr-navy-700: #334155;
  --clr-navy-600: #1e40af;
  --clr-navy-500: #2563eb;
  --clr-indigo-600: #3730a3;
  --clr-indigo-500: #4f46e5;
  --clr-indigo-400: #6366f1;
  --clr-violet-500: #7c3aed;
  --clr-cyan-400: #0284c7;
  --clr-cyan-300: #38bdf8;
  --clr-lavender: #e0e7ff;
  --clr-white: #ffffff;
  --clr-gray-50: #f8fafc;
  --clr-gray-100: #f1f5f9;
  --clr-gray-200: #e2e8f0;
  --clr-gray-300: #cbd5e1;
  --clr-gray-400: #94a3b8;
  --clr-gray-500: #64748b;
  --clr-gray-600: #475569;
  --clr-gray-700: #334155;
  --clr-gray-800: #1e293b;
  --clr-gray-900: #0f172a;

  --color-background: #f8fafc;
  --color-background-alt: #f1f5f9;
  --color-surface: #ffffff;
  --color-surface-elevated: #ffffff;
  --color-surface-overlay: rgba(255, 255, 255, 0.90);

  --color-primary: #0f172a;
  --color-primary-hover: #1e293b;
  --color-secondary: #2563eb;
  --color-secondary-hover: #1d4ed8;
  --color-accent: #0284c7;
  --color-accent-hover: #0369a1;

  --color-text: #0f172a;
  --color-text-secondary: #334155;
  --color-text-muted: #64748b;
  --color-text-inverse: #ffffff;
  --color-text-accent: #2563eb;

  --color-border: #e2e8f0;
  --color-border-strong: #cbd5e1;
  --color-border-subtle: rgba(226, 232, 240, 0.7);

  --color-success: #10b981;
  --color-warning: #f59e0b;

  --gradient-primary: linear-gradient(135deg, #0f172a 0%, #2563eb 100%);
  --gradient-secondary: linear-gradient(135deg, #2563eb 0%, #4f46e5 100%);
  --gradient-accent: linear-gradient(135deg, #0284c7 0%, #2563eb 100%);
  --gradient-hero: linear-gradient(135deg, #f0f4ff 0%, #f8fafc 50%, #eef2ff 100%);
  --gradient-cta: linear-gradient(135deg, #0f172a 0%, #1e1b4b 60%, #312e81 100%);
  --gradient-text: linear-gradient(135deg, #1d4ed8 0%, #4f46e5 100%);
  --gradient-surface: linear-gradient(180deg, #ffffff 0%, #f8fafc 100%);
  --gradient-card: linear-gradient(135deg, rgba(37,99,235,0.04) 0%, rgba(79,70,229,0.02) 100%);

  --shadow-xs: 0 1px 2px 0 rgba(15, 23, 42, 0.04);
  --shadow-sm: 0 2px 8px -1px rgba(15, 23, 42, 0.06), 0 1px 3px -1px rgba(15, 23, 42, 0.04);
  --shadow-md: 0 6px 20px -4px rgba(15, 23, 42, 0.08), 0 2px 8px -2px rgba(15, 23, 42, 0.04);
  --shadow-lg: 0 16px 40px -8px rgba(15, 23, 42, 0.10), 0 4px 16px -4px rgba(15, 23, 42, 0.06);
  --shadow-xl: 0 32px 64px -12px rgba(15, 23, 42, 0.14), 0 8px 24px -6px rgba(15, 23, 42, 0.08);

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

  --font-display: 'Plus Jakarta Sans', system-ui, sans-serif;
  --font-body: 'Manrope', system-ui, sans-serif;

  --text-xs: clamp(0.7rem, 0.65rem + 0.25vw, 0.75rem);
  --text-sm: clamp(0.8rem, 0.75rem + 0.25vw, 0.875rem);
  --text-base: clamp(0.9rem, 0.85rem + 0.25vw, 1rem);
  --text-md: clamp(1rem, 0.95rem + 0.25vw, 1.125rem);
  --text-lg: clamp(1.1rem, 1rem + 0.5vw, 1.25rem);
  --text-xl: clamp(1.2rem, 1.1rem + 0.6vw, 1.5rem);
  --text-2xl: clamp(1.4rem, 1.2rem + 1vw, 2rem);
  --text-3xl: clamp(1.75rem, 1.4rem + 1.75vw, 2.5rem);
  --text-4xl: clamp(2.25rem, 1.75rem + 2.5vw, 3.25rem);
  --text-5xl: clamp(2.5rem, 2rem + 3vw, 4rem);

  --weight-regular: 400;
  --weight-medium: 500;
  --weight-semibold: 600;
  --weight-bold: 700;
  --weight-extrabold: 800;

  --leading-tight: 1.15;
  --leading-snug: 1.35;
  --leading-normal: 1.6;
  --leading-relaxed: 1.7;

  --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;

  --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);

  --container-max: 1440px;

  --header-height: 72px;

  --z-base: 1;
  --z-raised: 10;
  --z-overlay: 100;
  --z-header: 300;
}

[data-theme="dark"] {
  --color-background: #0f172a;
  --color-background-alt: #1e293b;
  --color-surface: #1e293b;
  --color-surface-elevated: #334155;
  --color-surface-overlay: rgba(15, 23, 42, 0.90);

  --color-primary: #38bdf8;
  --color-primary-hover: #7dd3fc;
  --color-secondary: #60a5fa;
  --color-secondary-hover: #93c5fd;
  --color-accent: #38bdf8;
  --color-accent-hover: #7dd3fc;

  --color-text: #f8fafc;
  --color-text-secondary: #cbd5e1;
  --color-text-muted: #94a3b8;
  --color-text-inverse: #0f172a;
  --color-text-accent: #60a5fa;

  --color-border: rgba(255, 255, 255, 0.12);
  --color-border-strong: rgba(255, 255, 255, 0.22);
  --color-border-subtle: rgba(255, 255, 255, 0.06);

  --gradient-primary: linear-gradient(135deg, #2563eb 0%, #4f46e5 100%);
  --gradient-secondary: linear-gradient(135deg, #3b82f6 0%, #6366f1 100%);
  --gradient-accent: linear-gradient(135deg, #38bdf8 0%, #2563eb 100%);
  --gradient-hero: linear-gradient(145deg, #090d16 0%, #0f172a 50%, #1e293b 100%);
  --gradient-cta: linear-gradient(145deg, #090d16 0%, #0f172a 50%, #1e1b4b 100%);
  --gradient-surface: linear-gradient(180deg, #1e293b 0%, #0f172a 100%);
  --gradient-card: linear-gradient(135deg, rgba(96,165,250,0.08) 0%, rgba(56,189,248,0.04) 100%);

  --shadow-xs: 0 1px 2px 0 rgba(0, 0, 0, 0.3);
  --shadow-sm: 0 2px 8px -1px rgba(0, 0, 0, 0.4);
  --shadow-md: 0 6px 20px -4px rgba(0, 0, 0, 0.5);
  --shadow-lg: 0 16px 40px -8px rgba(0, 0, 0, 0.6);
  --shadow-xl: 0 32px 64px -12px rgba(0, 0, 0, 0.7);
}