:root{--brand-primary:#002c44;--brand-secondary:#4dbeee;--brand-text:#414042;--brand-background:#f6f6f6;--brand-bg-gradient:linear-gradient(160deg,#001420,#002c44 20%,#04456b 38%,#e8f3f8 66%,#f6f6f6);--brand-glow-primary:rgba(0,44,68,.35);--brand-glow-secondary:rgba(77,190,238,.3);--brand-surface:#fff;--brand-surface-elevated:#fbfdfe;--brand-tint-soft:rgba(77,190,238,.1);--brand-tint-softer:rgba(77,190,238,.05);--brand-border:rgba(0,44,68,.14);--brand-shadow-md:0 24px 64px rgba(0,44,68,.28),0 2px 8px rgba(0,44,68,.12);--brand-shadow-sm:0 2px 10px rgba(0,44,68,.1);--brand-muted:#6b6b6e;--brand-assistant-bubble:#eff8fc;--brand-assistant-accent:var(--brand-secondary);--brand-user-bubble:linear-gradient(135deg,var(--brand-primary),var(--brand-secondary));--brand-input-focus-ring:rgba(77,190,238,.35);--brand-online:#2fbf71;--brand-warning:#b26a00;--brand-danger:#b00020}body,html{background:var(--brand-background);color:var(--brand-text);margin:0;padding:0}