:root{
/* base — dark */
--navy-900:#000D51;--navy-800:#071A6E;--cobalt-700:#1C33A8;--cobalt-600:#213DC9;--cobalt-500:#3B5AE6;--cobalt-100:#C9D3F7;
/* glow — energy/electron flow only */
--cyan-400:#00D1FF;--cyan-300:#5CE1FF;--cyan-glow:rgba(0,209,255,.45);--cyan-glow-soft:rgba(0,209,255,.18);
/* extreme environments — fixed 1:1 mapping, never swap */
--env-heat:#F06111;--env-heat-soft:rgba(240,97,17,.14);
--env-cold:#4FC3F7;--env-cold-soft:rgba(79,195,247,.16);
--env-rad:#A855F7;--env-rad-soft:rgba(168,85,247,.16);
/* light surfaces */
--light-50:#F6F8FE;--light-100:#EDF1FD;--light-200:#DDE4F8;--white:#FFFFFF;
/* neutrals derived from navy */
--ink-900:#000D51;--ink-700:#2A3468;--ink-500:#5A6491;--ink-300:#9AA3C7;--line-200:#D5DCF3;--line-100:#E6EAF8;
/* semantic — dark theme (default for covers/closing) */
--bg-gradient:linear-gradient(160deg,#000D51 0%,#1C33A8 100%);
--bg-dark:#000D51;--surface-glass:rgba(255,255,255,.06);--surface-glass-strong:rgba(255,255,255,.10);--border-glass:rgba(0,209,255,.35);--border-glass-soft:rgba(255,255,255,.14);
--text-on-dark:#FFFFFF;--text-on-dark-muted:rgba(255,255,255,.72);--text-on-dark-faint:rgba(255,255,255,.5);
/* semantic — light theme (body pages) */
--bg-light:#F6F8FE;--surface-card:#FFFFFF;--surface-card-tint:#EDF1FD;--border-card:#D5DCF3;
--text-body:#000D51;--text-muted:#5A6491;--text-faint:#9AA3C7;
--accent:#1C33A8;--accent-strong:#213DC9;--accent-hover:#213DC9;--accent-press:#000D51;
--focus-ring:0 0 0 3px rgba(0,209,255,.5);
--success:#10B981;--warning:#F06111;--danger:#E5304C;
}