:root {
    /* Colors */
    --primary-dark: #0A1929;
    --accent-cyan: #00D4FF;
    --accent-purple: #7C3AED;
    --text-light: #F5F7FA;
    --text-muted: #94A3B8;
    --card-dark: #1E293B;
    --success-gold: #FBBF24;
    --error-red: #EF4444;
    
    /* Glassmorphism */
    --glass-bg: rgba(30, 41, 59, 0.7);
    --glass-border: rgba(0, 212, 255, 0.2);
    --glass-border-hover: rgba(0, 212, 255, 0.6);
    
    /* Fonts */
    --font-display: -apple-system, 'Segoe UI', system-ui, 'Helvetica Neue', sans-serif;
    --font-body: -apple-system, 'Segoe UI', system-ui, 'Helvetica Neue', sans-serif;
    --font-code: 'Fira Code', 'Cascadia Code', source-code-pro, Menlo, Monaco, Consolas, 'Courier New', monospace;

    /* Fluid Typography */
    --fs-h1: clamp(3rem, 8vw, 4rem);    /* 48-64px */
    --fs-h2: clamp(2rem, 5vw, 3rem);    /* 32-48px */
    --fs-h3: clamp(1.5rem, 3vw, 2rem);  /* 24-32px */
    --fs-body: clamp(1rem, 1.125rem, 1.125rem); /* 16-18px */
    --fs-small: 0.875rem;              /* 14px */

    /* Spacing */
    --spacing-xs: 4px;
    --spacing-sm: 8px;
    --spacing-md: 16px;
    --spacing-lg: 24px;
    --spacing-xl: 32px;
    --spacing-2xl: 48px;
    --spacing-3xl: 64px;

    /* Shadows */
    --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --glow-cyan: 0 0 15px rgba(0, 212, 255, 0.3);
    --glow-cyan-strong: 0 0 25px rgba(0, 212, 255, 0.5);

    /* Border Radius */
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-full: 9999px;

    /* Z-index Scale */
    --z-dropdown: 100;
    --z-sticky: 150;
    --z-modal: 200;
    --z-tooltip: 300;
}

/* Base resets */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    scroll-behavior: smooth;
}

body {
    background-color: var(--primary-dark);
    color: var(--text-light);
    font-family: var(--font-body);
    font-size: var(--fs-body);
    line-height: 1.6;
    overflow-x: hidden;
}

h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-display);
    line-height: 1.2;
    margin-bottom: var(--spacing-md);
    font-weight: 700;
}

h1 { font-size: var(--fs-h1); }
h2 { font-size: var(--fs-h2); }
h3 { font-size: var(--fs-h3); }

a {
    color: inherit;
    text-decoration: none;
    transition: all 0.3s ease;
}

img {
    max-width: 100%;
    display: block;
}