:root{
/* ── Base palette ───────────────────────────────────────────── */
/* Ink: near-black with a cold cast. The brand's default background for
   anything that should feel like infrastructure. */
--ink-900:#070A0E;--ink-800:#0B1016;--ink-700:#121923;--ink-600:#1A2431;--ink-500:#243141;

/* Slate: UI neutrals on light surfaces */
--slate-700:#3A4757;--slate-600:#55647A;--slate-500:#75859B;--slate-400:#9CA9BB;
--slate-300:#C4CDD9;--slate-200:#DEE4EC;--slate-100:#EDF1F6;--slate-050:#F5F7FA;

/* Paper: warm-neutral light surfaces, never pure white */
--paper-000:#FFFFFF;--paper-050:#FBFBF9;--paper-100:#F4F4F0;

/* Ultramarine — the primary brand colour. Confident, engineered, not corporate-navy. */
--blue-700:#16249B;--blue-600:#1D31C4;--blue-500:#2743E8;--blue-400:#5A70F0;--blue-200:#B9C3FA;--blue-050:#EDEFFE;

/* Signal — a single high-voltage accent. Used for emphasis, live states,
   and one focal element per screen. Never as a large fill. */
--signal-600:#9CC81A;--signal-500:#C8F24E;--signal-100:#EDFBC4;

/* Semantic hues */
--green-600:#12805A;--green-500:#19A374;--green-100:#DCF3EA;
--amber-600:#B57611;--amber-500:#E0A63A;--amber-100:#FBEED4;
--red-600:#B33325;--red-500:#D6493A;--red-100:#FBE2DE;
--cyan-500:#1FA5C4;--cyan-100:#D9F1F7;

/* ── Semantic aliases ───────────────────────────────────────── */
--text-heading:var(--ink-800);
--text-body:var(--slate-700);
--text-muted:var(--slate-500);
--text-inverse:var(--paper-050);
--text-inverse-muted:#93A2B5;
--text-link:var(--blue-500);
--text-link-hover:var(--blue-700);
--text-on-accent:var(--paper-000);

--surface-page:var(--paper-050);
--surface-card:var(--paper-000);
--surface-sunken:var(--slate-050);
--surface-inverse:var(--ink-800);
--surface-inverse-raised:var(--ink-700);
--surface-accent-soft:var(--blue-050);
--surface-code:var(--ink-900);

--border-subtle:var(--slate-200);
--border-default:var(--slate-300);
--border-strong:var(--slate-500);
--border-inverse:#22303F;
--border-accent:var(--blue-500);

--accent-primary:var(--blue-500);
--accent-primary-hover:var(--blue-600);
--accent-primary-press:var(--blue-700);
--accent-signal:var(--signal-500);

--status-success-fg:var(--green-600);--status-success-bg:var(--green-100);
--status-warning-fg:var(--amber-600);--status-warning-bg:var(--amber-100);
--status-danger-fg:var(--red-600);--status-danger-bg:var(--red-100);
--status-info-fg:var(--cyan-500);--status-info-bg:var(--cyan-100);

--focus-ring:0 0 0 3px rgba(39,67,232,.28);
--focus-ring-inverse:0 0 0 3px rgba(200,242,78,.35);

/* Grid / blueprint texture line colour */
--grid-line-light:rgba(39,67,232,.09);
--grid-line-dark:rgba(255,255,255,.055);
}