:root {
  /* Color — COPSOS design system */
  --color-obsidian: #050505;
  --color-basalt: #111111;
  --color-basalt-lift: #171717;
  --color-deep-black: #080808;
  --color-mineral: #0c0c0e;
  --color-magma: #ff2b2b;
  --color-ember: #b31217;
  --color-dark-energy: #5e090c;
  --color-titanium: #a5a9b2;
  --color-smoke: #707070;
  --color-white: #f7f7f7;
  --color-electric-blue: #3b82f6;

  /* Surfaces — depth world (all extremely dark) */
  --surface-void: #030303;
  --surface-obsidian: var(--color-obsidian);
  --surface-basalt: var(--color-basalt);
  --surface-breath: #0a0a0a;
  --surface-elevated: #0e0e10;
  --surface-live: #0b0b0d;
  --surface-professional: #0c0c0c;

  /* Red depth language */
  --red-core: rgba(255, 43, 43, 0.9);
  --red-glow: rgba(179, 18, 23, 0.35);
  --red-falloff: rgba(94, 9, 12, 0.12);

  /* Blue depth (emotional, never competing) */
  --blue-falloff: rgba(59, 130, 246, 0.045);

  /* Depth layer offsets (parallax conceptual) */
  --depth-bg: 0.97;
  --depth-media: 1;
  --depth-fg: 1.015;

  /* Spacing */
  --space-2xs: 0.25rem;
  --space-xs: 0.5rem;
  --space-sm: 0.75rem;
  --space-md: 1.25rem;
  --space-lg: 2rem;
  --space-xl: 3.5rem;
  --space-2xl: 5rem;
  --space-3xl: 7.5rem;
  --space-section: clamp(5rem, 14vw, 10rem);
  --space-section-tight: clamp(3.5rem, 9vw, 6.5rem);

  /* Layout — 12-col editorial */
  --container-wide: 100rem;
  --container-default: 80rem;
  --container-narrow: 42rem;
  --container-text: 36rem;
  --header-height: 4.75rem;
  --gutter: clamp(1rem, 3vw, 2rem);
  --radius-sm: 0.125rem;
  --radius-md: 0.25rem;

  /* Typography */
  --font-display: "Space Grotesk", "Segoe UI", sans-serif;
  --font-body: "Inter", "Segoe UI", sans-serif;
  --text-xs: 0.75rem;
  --text-sm: 0.875rem;
  --text-base: 1rem;
  --text-lg: 1.125rem;
  --text-xl: clamp(1.25rem, 2vw, 1.5rem);
  --text-2xl: clamp(1.75rem, 3vw, 2.5rem);
  --text-display: clamp(3.5rem, 12vw, 7.5rem);
  --text-hero: clamp(4.25rem, 16vw, 11rem);
  --text-section: clamp(2.25rem, 6vw, 4.5rem);
  --text-poster: clamp(3rem, 10vw, 8rem);

  /* Motion DNA — COPSOS tempo */
  --motion-instant: 80ms;
  --motion-fast: 250ms;
  --motion-normal: 450ms;
  --motion-base: var(--motion-normal);
  --motion-slow: 700ms;
  --motion-cinematic: 900ms;
  --motion-reveal: var(--motion-slow);
  --ease-standard: cubic-bezier(0.22, 1, 0.36, 1);
  --ease-soft: cubic-bezier(0.16, 1, 0.3, 1);
  --ease-impact: cubic-bezier(0.76, 0, 0.24, 1);
  --ease-copsos: var(--ease-standard);
  --ease-release: var(--ease-soft);
  --ease-out: var(--ease-standard);
  --ease-breathe: cubic-bezier(0.45, 0.05, 0.55, 0.95);
  --ease-physical: var(--ease-standard);
  --reveal-stagger: 60ms;

  /* Energy states — COPSOS signature */
  --energy-red: 0.35;
  --energy-glow: 0;
  --energy-motion: 1;
  --energy-contrast: 1;
  --energy-density: 0.5;
  --energy-line: rgba(255, 43, 43, 0.28);

  /* Elevation / effects */
  --shadow-glow-magma: 0 0 24px var(--red-glow), 0 0 48px var(--red-falloff);
  --border-subtle: 1px solid rgba(247, 247, 247, 0.08);
  --border-strong: 1px solid rgba(247, 247, 247, 0.16);

  /* Z-index — world stack */
  --z-base: 1;
  --z-background: 1;
  --z-atmosphere: 2;
  --z-media: 3;
  --z-decor: 4;
  --z-content: 5;
  --z-foreground: 6;
  --z-header: 100;
  --z-menu: 200;
  --z-overlay: 300;
  --z-modal: 400;
}