:root {
  /* Background levels */
  --bg-void: #050607;
  --bg-deep: #0a0c0f;
  --bg-base: #0e1116;
  --bg-elevated: #141920;
  --bg-panel: #1a212b;

  /* Surfaces */
  --surface-glass: rgba(20, 28, 38, 0.72);
  --surface-glass-strong: rgba(26, 34, 44, 0.88);
  --surface-overlay: rgba(5, 6, 7, 0.92);

  /* Borders */
  --border-subtle: rgba(148, 163, 184, 0.12);
  --border-default: rgba(148, 163, 184, 0.22);
  --border-strong: rgba(148, 163, 184, 0.38);
  --border-accent: rgba(56, 189, 248, 0.45);

  /* Accents */
  --accent-primary: #38bdf8;
  --accent-primary-deep: #0ea5e9;
  --accent-secondary: #67e8f9;
  --accent-success: #34d399;
  --accent-warning: #fbbf24;
  --accent-danger: #f87171;

  /* Text */
  --text-primary: #f8fafc;
  --text-secondary: #d5dee8;
  --text-muted: #a8b6c7;
  --text-dim: #8494a7;
  --text-inverse: #0a0c0f;

  /* Typography */
  --font-display: "Oxanium", "Segoe UI", sans-serif;
  --font-body: "IBM Plex Sans", "Segoe UI", sans-serif;
  --font-mono: "IBM Plex Mono", ui-monospace, monospace;

  --text-xs: clamp(0.75rem, 0.7rem + 0.2vw, 0.8125rem);
  --text-sm: clamp(0.875rem, 0.82rem + 0.25vw, 0.9375rem);
  --text-base: clamp(1rem, 0.95rem + 0.3vw, 1.0625rem);
  --text-lg: clamp(1.125rem, 1.05rem + 0.4vw, 1.25rem);
  --text-xl: clamp(1.25rem, 1.15rem + 0.55vw, 1.5rem);
  --text-2xl: clamp(1.5rem, 1.3rem + 0.9vw, 2rem);
  --text-3xl: clamp(1.875rem, 1.5rem + 1.4vw, 2.75rem);
  --text-4xl: clamp(2.25rem, 1.7rem + 2.2vw, 3.75rem);
  --text-5xl: clamp(2.75rem, 2rem + 3vw, 5rem);
  --text-hero: clamp(2.5rem, 1.6rem + 4.2vw, 5.5rem);

  --leading-tight: 1.1;
  --leading-snug: 1.25;
  --leading-normal: 1.6;
  --leading-relaxed: 1.65;
  --leading-list: 1.45;
  --tracking-tight: -0.02em;
  --tracking-wide: 0.08em;
  --tracking-wider: 0.16em;

  /* Layout */
  --nav-height: 4.25rem;
  --container-max: 72rem;
  --container-wide: 90rem;
  --container-pad: clamp(1.25rem, 4vw, 2.5rem);
  --section-space: clamp(3.25rem, 5.5vw, 5.5rem);
  --section-space-sm: clamp(2.25rem, 4vw, 3.5rem);

  /* Card / panel interior spacing */
  --space-card-pad-block: clamp(1.75rem, 2.8vw, 2.25rem);
  --space-card-pad-inline: clamp(1.625rem, 2.5vw, 2rem);
  --space-panel-pad: clamp(1.5rem, 3.5vw, 2.75rem);
  --space-stack-xs: 1rem;
  --space-stack-sm: 1.35rem;
  --space-stack-md: 1.75rem;
  --space-stack-lg: 2.15rem;

  /* Radius */
  --radius-sm: 0.375rem;
  --radius-md: 0.625rem;
  --radius-lg: 0.875rem;
  --radius-xl: 1.25rem;
  --radius-pill: 999px;

  /* Shadows & glow */
  --shadow-soft: 0 12px 40px rgba(0, 0, 0, 0.35);
  --shadow-panel: 0 18px 50px rgba(0, 0, 0, 0.45);
  --glow-primary: 0 0 24px rgba(56, 189, 248, 0.28);
  --glow-primary-strong: 0 0 40px rgba(56, 189, 248, 0.4);
  --glow-success: 0 0 20px rgba(52, 211, 153, 0.28);
  --glow-warning: 0 0 20px rgba(251, 191, 36, 0.25);
  --glow-intensity: 0.35;

  /* Motion */
  --ease-out: cubic-bezier(0.22, 1, 0.36, 1);
  --ease-soft: cubic-bezier(0.4, 0, 0.2, 1);
  --duration-fast: 160ms;
  --duration-base: 280ms;
  --duration-slow: 520ms;
  --duration-reveal: 700ms;

  /* Focus */
  --focus-ring: 0 0 0 2px var(--bg-deep), 0 0 0 4px var(--accent-primary);

  /* Status */
  --status-operational: var(--accent-success);
  --status-early-access: var(--accent-primary);
  --status-development: var(--accent-warning);
  --status-maintenance: #fb923c;
  --status-coming-soon: var(--text-muted);
}

@media (max-width: 768px) {
  :root {
    --nav-height: 3.75rem;
  }
}