:root {
    --color-navy-950: #070b14;
    --color-navy-900: #0b1220;
    --color-navy-800: #121b2e;
    --color-navy-700: #1a2740;
    --color-navy-600: #243352;

    --color-cyan-300: #7ad7ea;
    --color-cyan-400: #3ec6e0;
    --color-cyan-500: #1aa7c4;
    --color-blue-400: #5b8cff;
    --color-blue-500: #2b6cff;
    --color-blue-600: #1d56e0;
    --color-indigo-500: #5b5ce6;
    --color-violet-500: #6e5cff;

    --color-white: #ffffff;
    --color-off-white: #f4f6fa;
    --color-mist: #e8edf5;
    --color-slate-200: #d4dce8;
    --color-slate-400: #7b8aa0;
    --color-slate-500: #5d6b82;
    --color-slate-600: #445068;
    --color-slate-800: #1e2a3d;

    --bg-body: var(--color-off-white);
    --bg-surface: var(--color-white);
    --bg-tint: #eef2f8;
    --bg-inverse: var(--color-navy-900);
    --bg-inverse-elevated: var(--color-navy-800);
    --bg-deep: #0e1628;
    --bg-header: rgba(255, 255, 255, 0.92);
    --bg-header-overlay: rgba(7, 11, 20, 0.28);
    --bg-header-scrolled: rgba(255, 255, 255, 0.96);

    --text-primary: var(--color-navy-900);
    --text-secondary: var(--color-slate-600);
    --text-muted: var(--color-slate-500);
    --text-inverse: #e9eef6;
    --text-inverse-muted: #9aa8bd;
    --text-accent: var(--color-cyan-500);

    --border-subtle: rgba(15, 23, 42, 0.08);
    --border-strong: rgba(15, 23, 42, 0.14);
    --border-inverse: rgba(255, 255, 255, 0.1);
    --border-accent: rgba(26, 167, 196, 0.45);

    --gradient-hero: linear-gradient(155deg, #0b1220 0%, #132033 46%, #10243a 72%, #0e1a30 100%);
    --gradient-accent: linear-gradient(135deg, var(--color-blue-600) 0%, var(--color-cyan-500) 100%);
    --gradient-cta: linear-gradient(145deg, #10192c 0%, #172844 58%, #14324a 100%);
    --gradient-deep: linear-gradient(180deg, #0c1424 0%, #111d32 100%);
    --gradient-rule: linear-gradient(90deg, var(--color-blue-500), var(--color-cyan-400), var(--color-violet-500));

    --font-display: "Outfit", "Segoe UI", system-ui, sans-serif;
    --font-body: "Source Sans 3", "Segoe UI", "Helvetica Neue", Arial, sans-serif;

    --fw-regular: 400;
    --fw-medium: 500;
    --fw-semibold: 600;
    --fw-bold: 700;

    --fs-xs: 0.75rem;
    --fs-sm: 0.875rem;
    --fs-md: 1rem;
    --fs-lg: 1.125rem;
    --fs-xl: 1.25rem;
    --fs-2xl: 1.5rem;
    --fs-3xl: clamp(1.65rem, 1.2vw + 1.2rem, 2.15rem);
    --fs-4xl: clamp(2.1rem, 3.4vw + 1rem, 3.4rem);
    --fs-5xl: clamp(2.4rem, 4.6vw + 1rem, 4.15rem);

    --lh-tight: 1.12;
    --lh-snug: 1.28;
    --lh-body: 1.65;
    --tracking-display: -0.03em;
    --tracking-wide: 0.14em;

    --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-gutter: clamp(1.25rem, 4vw, 2rem);
    --space-section: clamp(4.5rem, 8vw, 7.5rem);

    --container: 72rem;
    --container-wide: 80rem;
    --container-narrow: 46rem;

    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;

    --shadow-sm: 0 1px 2px rgba(11, 18, 32, 0.05);
    --shadow-md: 0 10px 28px rgba(11, 18, 32, 0.08);
    --shadow-lg: 0 22px 50px rgba(11, 18, 32, 0.12);
    --shadow-header: 0 1px 0 rgba(15, 23, 42, 0.06), 0 10px 24px rgba(11, 18, 32, 0.05);
    --shadow-glow: 0 0 0 1px rgba(58, 198, 224, 0.22), 0 0 28px rgba(26, 167, 196, 0.12);

    --ease: 220ms cubic-bezier(0.22, 1, 0.36, 1);
    --ease-out: 320ms cubic-bezier(0.16, 1, 0.3, 1);

    --header-height: 4.75rem;
    --header-height-compact: 4.15rem;

    --z-header: 100;
    --z-nav: 120;
    --z-backdrop: 110;
}

/*
    Breakpoints (used in responsive.css and main.js):
    1280px condensed desktop nav
    1200px laptop / mobile navigation
    900px tablet
    640px large mobile
    400px small mobile
*/