:root {
    color-scheme: dark;

    --color-bg: #080b0f;
    --color-bg-web: #0d0f13;
    --color-page: #0d0f13;
    --color-bg-deep: #0a0b0d;

    --color-surface: #14171c;
    --color-card: #14171c;
    --color-nav: #1d1f24;
    --color-surface-deep: #181a1e;
    --color-surface-elevated: #22252b;

    --color-accent: #ff5722;
    --color-accent-soft: rgba(255, 87, 34, 0.12);
    --color-accent-muted: rgba(255, 87, 34, 0.22);
    --color-accent-strong: rgba(255, 87, 34, 0.42);

    --color-text: rgba(255, 255, 255, 0.92);
    --text-primary: rgba(255, 255, 255, 0.92);
    --color-title: #f5f5f5;
    --color-text-muted: rgba(255, 255, 255, 0.55);
    --text-secondary: rgba(255, 255, 255, 0.55);
    --color-text-subtle: rgba(255, 255, 255, 0.45);

    --border-default: rgba(255, 255, 255, 0.08);
    --border: rgba(255, 255, 255, 0.08);
    --border-strong: rgba(255, 255, 255, 0.12);
    --border-nav: rgba(255, 255, 255, 0.11);
    --border-accent: rgba(255, 87, 34, 0.38);

    --glow-soft: rgba(255, 87, 34, 0.15);
    --glow-medium: rgba(255, 87, 34, 0.28);
    --glow-strong: rgba(255, 87, 34, 0.45);

    --glass: rgba(21, 22, 27, 0.8);
    --glass-blur: blur(12px);

    --radius-card: 18px;
    --radius-small: 12px;
    --radius-button: 16px;
    --radius-pill: 999px;
    --radius-topbar: 18px;

    --transition-fast: 150ms;
    --transition-normal: 240ms;
    --transition-slow: 280ms;
    --ease-mastertech: cubic-bezier(0.22, 1, 0.36, 1);

    --font-display: "Orbitron", "Segoe UI", Tahoma, sans-serif;
    --font-ui: "Exo 2", "Segoe UI", Tahoma, sans-serif;
    --font-body: "Inter", "Segoe UI", system-ui, -apple-system, sans-serif;

    --text-h1: 2.125rem;
    --text-h2: 1.5rem;
    --text-h3: 1.25rem;
    --text-section: 1.125rem;
    --text-card: 1rem;
    --text-body: 0.9375rem;
    --text-small: 0.8125rem;
    --text-caption: 0.6875rem;

    --container-max: 72.5rem;
    --container-wide: 78rem;
    --gutter: clamp(1.15rem, 3.2vw, 2rem);

    --header-height: 4.75rem;
    --z-skip: 400;
    --z-header: 300;
    --z-nav: 320;
    --z-overlay: 280;
    --z-assistant: 360;

    --focus-ring: 2px solid rgba(255, 87, 34, 0.55);
    --focus-offset: 3px;

    --shadow-card: 0 18px 40px rgba(0, 0, 0, 0.28);
    --grid-line: rgba(255, 255, 255, 0.035);
}