/* CSS Custom Properties (Variables) */
:root {
    /* Color Palette */
    --background: #ffffff;
    --foreground: #2d3748;
    --primary: #005293;
    --primary-light: #0074cc;
    --primary-foreground: #ffffff;
    --secondary: #fbfcfd;
    --muted: #f8f9fa;
    --muted-foreground: #4a5568;
    --accent: #f1f5f9;
    --border: #e2e8f0;
    --success: #22c55e;
    
    /* Layout */
    --radius: 0.5rem;
    --header-height: 5rem;
    --header-height-mobile: 4.5rem;
    --header-height-large: 6rem;
    
    /* Typography */
    --font-family: 'Inter', system-ui, -apple-system, sans-serif;
    --font-weight-light: 300;
    --font-weight-normal: 400;
    --font-weight-medium: 500;
    --font-weight-semibold: 600;
    --font-weight-bold: 700;
    
    /* Spacing */
    --container-max-width: 75rem;
    --container-padding: clamp(1.25rem, 5vw, 3rem);
    
    /* Transitions */
    --transition-fast: 0.15s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-normal: 0.2s ease;
    --transition-smooth: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-entrance: 0.6s cubic-bezier(0.4, 0, 0.2, 1);
    
    /* Shadows */
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.08);
    --shadow-lg: 0 10px 25px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
    --shadow-primary: 0 25px 50px -12px rgba(0, 82, 147, 0.25);
    --shadow-primary-hover: 0 20px 40px -12px rgba(0, 82, 147, 0.3);
    
    /* Z-index scale */
    --z-dropdown: 10;
    --z-sticky: 20;
    --z-fixed: 30;
    --z-modal-backdrop: 40;
    --z-modal: 50;
    --z-popover: 60;
    --z-tooltip: 70;
}

/* Responsive breakpoints as CSS custom properties */
@media (max-width: 1023px) {
    :root {
        --header-height: var(--header-height-mobile);
    }
}

@media (min-width: 1024px) {
    :root {
        --header-height: var(--header-height-large);
    }
}