:root{
/* --- base neutrals: industrial graphite, slightly warm --- */
--nv-black:#0B0D0E;
--nv-graphite-900:#131617;
--nv-graphite-800:#1C2022;
--nv-graphite-700:#282D30;
--nv-graphite-600:#3A4145;
--nv-graphite-500:#5C6569;
--nv-graphite-400:#868F93;
--nv-graphite-300:#B4BBBE;
--nv-graphite-200:#D8DCDD;
--nv-graphite-100:#EAEDED;
--nv-bone:#F4F3F0;
--nv-white:#FFFFFF;

/* --- brand: copper (conductor) primary accent, steel secondary --- */
--nv-copper-700:#8A3A16;
--nv-copper-600:#A9481B;
--nv-copper-500:#C85A22;
--nv-copper-400:#DE7239;
--nv-copper-200:#F0C4AC;
--nv-copper-050:#FAEDE5;
--nv-steel-700:#1F3A46;
--nv-steel-500:#3C6274;
--nv-steel-300:#8FAEB9;

/* --- semantic status --- */
--nv-green-500:#2F7D4F;
--nv-amber-500:#C08A12;
--nv-red-500:#B3301F;

/* --- semantic surfaces (light context = default) --- */
--color-background-primary:var(--nv-bone);
--color-background-secondary:var(--nv-graphite-100);
--color-background-dark:var(--nv-black);
--color-surface:var(--nv-white);
--color-surface-elevated:var(--nv-white);
--color-surface-inset:var(--nv-graphite-100);

/* --- semantic text --- */
--color-text-primary:var(--nv-black);
--color-text-secondary:var(--nv-graphite-600);
--color-text-muted:var(--nv-graphite-500);
--color-text-inverse:var(--nv-bone);
--color-text-accent:var(--nv-copper-600);

/* --- brand aliases --- */
--color-brand-primary:var(--nv-copper-500);
--color-brand-primary-hover:var(--nv-copper-600);
--color-brand-secondary:var(--nv-steel-700);
--color-brand-accent:var(--nv-copper-400);

/* --- lines --- */
--color-border:var(--nv-graphite-300);
--color-border-strong:var(--nv-graphite-600);
--color-border-subtle:var(--nv-graphite-200);
--color-focus:var(--nv-copper-500);

/* --- status semantics --- */
--color-success:var(--nv-green-500);
--color-warning:var(--nv-amber-500);
--color-error:var(--nv-red-500);
--color-success-surface:#EAF2ED;
--color-warning-surface:#F8F1DE;
--color-error-surface:#F7E9E7;

/* --- media / overlay --- */
--color-overlay-scrim:linear-gradient(180deg,rgba(11,13,14,0) 0%,rgba(11,13,14,.15) 45%,rgba(11,13,14,.82) 100%);
--color-media-placeholder:var(--nv-graphite-800);
}

/* Dark section context. Apply to any section wrapper; all semantic tokens flip. */
[data-theme="dark"]{
--color-background-primary:var(--nv-black);
--color-background-secondary:var(--nv-graphite-900);
--color-surface:var(--nv-graphite-900);
--color-surface-elevated:var(--nv-graphite-800);
--color-surface-inset:var(--nv-graphite-800);
--color-text-primary:var(--nv-bone);
--color-text-secondary:var(--nv-graphite-300);
--color-text-muted:var(--nv-graphite-400);
--color-text-inverse:var(--nv-black);
--color-text-accent:var(--nv-copper-400);
--color-border:var(--nv-graphite-700);
--color-border-strong:var(--nv-graphite-500);
--color-border-subtle:var(--nv-graphite-800);
--color-brand-primary:var(--nv-copper-500);
--color-brand-primary-hover:var(--nv-copper-400);
--color-media-placeholder:var(--nv-graphite-800);
}