/* CSS Custom Properties */
:root {
    /* Color Palette - Deep Tech Blue */
    --color-primary: #0a4d8f;
    --color-primary-light: #1565b8;
    --color-primary-dark: #073763;
    --color-secondary: #00d4ff;
    --color-accent: #6c63ff;
    
    /* Gradients */
    --gradient-primary: linear-gradient(135deg, #0a4d8f 0%, #1565b8 100%);
    --gradient-hero: linear-gradient(135deg, #000814 0%, #0a4d8f 50%, #1565b8 100%);
    --gradient-overlay: linear-gradient(135deg, rgba(10, 77, 143, 0.95) 0%, rgba(0, 8, 20, 0.85) 100%);
    --gradient-text: linear-gradient(135deg, #00d4ff 0%, #6c63ff 100%);
    
    /* Neutral Colors */
    --color-bg-dark: #000814;
    --color-bg-darker: #000510;
    --color-bg-medium: #0d1b2a;
    --color-bg-light: #1b263b;
    --color-text-primary: #ffffff;
    --color-text-secondary: #b8c5d6;
    --color-text-muted: #8a9db5;
    --color-border: #1b3a5f;
    
    /* Typography */
    --font-primary: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Inter', sans-serif;
    --font-display: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Inter', 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;
    
    /* Spacing - Generous whitespace for premium feel */
    --space-xs: 0.5rem;
    --space-sm: 1rem;
    --space-md: 1.5rem;
    --space-lg: 2rem;
    --space-xl: 3rem;
    --space-2xl: 4rem;
    --space-3xl: 6rem;
    --space-4xl: 8rem;
    --space-5xl: 12rem;
    
    /* Layout */
    --container-width: 1400px;
    --section-padding: var(--space-5xl);
    --section-padding-mobile: var(--space-3xl);
    
    /* Border Radius - Flat design */
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --radius-xl: 16px;
    
    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-base: 250ms ease;
    --transition-slow: 400ms ease;
    --transition-slower: 600ms cubic-bezier(0.4, 0, 0.2, 1);
    
    /* Shadows */
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.5);
    --shadow-glow: 0 0 32px rgba(0, 212, 255, 0.3);
    
    /* Z-index */
    --z-base: 1;
    --z-dropdown: 100;
    --z-nav: 200;
    --z-overlay: 300;
    --z-modal: 400;
}