/**
 * ByteStream Design Tokens & Global CSS Variables
 * Phase 17: Centralized Brand System
 */

:root {
    /* Brand Color Palette */
    --color-primary-navy: #111827;
    --color-primary-blue: #2563EB;
    --color-primary-blue-hover: #1D4ED8;
    --color-primary-blue-light: rgba(37, 99, 235, 0.08);
    --color-accent-blue: #60A5FA;
    --color-dark-gray: #374151;
    --color-charcoal: #1F2937;
    --color-muted-gray: #6B7280;
    --color-light-gray: #F8FAFC;
    --color-surface-gray: #F1F5F9;
    --color-white: #FFFFFF;
    --color-border: rgba(55, 65, 81, 0.08);
    --color-border-hover: rgba(37, 99, 235, 0.3);
    --color-border-dark: rgba(255, 255, 255, 0.1);

    /* Typography System */
    --font-sans: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
    --font-mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;

    /* Type Scale */
    --font-size-xs: 0.75rem;    /* 12px */
    --font-size-sm: 0.875rem;   /* 14px */
    --font-size-base: 1rem;     /* 16px */
    --font-size-lg: 1.125rem;   /* 18px */
    --font-size-xl: 1.25rem;    /* 20px */
    --font-size-2xl: 1.5rem;    /* 24px */
    --font-size-3xl: 1.875rem;  /* 30px */
    --font-size-4xl: 2.25rem;   /* 36px */
    --font-size-5xl: 3rem;      /* 48px */
    --font-size-6xl: 3.75rem;   /* 60px */

    /* Spacing Scale (8px Modular Grid) */
    --space-1: 4px;
    --space-2: 8px;
    --space-3: 12px;
    --space-4: 16px;
    --space-5: 20px;
    --space-6: 24px;
    --space-8: 32px;
    --space-10: 40px;
    --space-12: 48px;
    --space-16: 64px;
    --space-20: 80px;
    --space-24: 96px;
    --space-32: 128px;

    /* Container & Layout */
    --container-max-width: 1280px;
    --container-padding: 24px;
    --header-height: 76px;

    /* Border Radius */
    --radius-xs: 4px;
    --radius-sm: 6px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --radius-xl: 16px;
    --radius-2xl: 24px;
    --radius-full: 9999px;

    /* Elevation & Subtle Shadows (restrained, enterprise-grade) */
    --shadow-sm: 0 1px 2px rgba(17, 24, 39, 0.04);
    --shadow-md: 0 4px 12px rgba(17, 24, 39, 0.05);
    --shadow-lg: 0 12px 30px rgba(17, 24, 39, 0.06);
    --shadow-blue-sm: 0 4px 12px rgba(37, 99, 235, 0.15);
    --shadow-blue-lg: 0 12px 28px rgba(37, 99, 235, 0.2);

    /* Transitions */
    --transition-fast: 150ms ease-out;
    --transition-base: 250ms cubic-bezier(0.16, 1, 0.3, 1);
    --transition-smooth: 350ms cubic-bezier(0.16, 1, 0.3, 1);
}