:root {
    /* Color Palette - Dark Mode (Default) */
    --color-bg-body: #0a0c10;
    --color-bg-surface: #12141a;
    --color-bg-surface-hover: #1c1e24;

    --color-primary: hsl(220, 90%, 58%);
    --color-primary-hover: hsl(220, 90%, 50%);
    --color-primary-alpha: hsla(220, 90%, 58%, 0.1);

    --color-text-main: #e1e1e3;
    --color-text-muted: #a0a0a5;
    --color-text-accent: #64ffda;
    /* Tech accent, e.g., Teal */

    --color-border: #2d3039;
    --color-border-hover: #454850;

    /* Typography */
    --font-sans: 'Inter', system-ui, -apple-system, sans-serif;
    --font-heading: 'Outfit', sans-serif;
    --font-mono: 'JetBrains Mono', monospace;

    /* Spacing & Layout */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 4rem;
    --spacing-3xl: 6rem;

    --container-width: 1200px;
    --header-height: 80px;

    /* Effects */
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;

    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.2);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.3);
    --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.4);

    --transition-fast: 0.15s ease;
    --transition-base: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-smooth: 0.5s cubic-bezier(0.25, 1, 0.5, 1);
}