:root{--bg:#0f172a;--surface:#1e293b;--border:#334155;--text:#f1f5f9;--muted:#94a3b8;--primary:#3b82f6;--primary-hover:#2563eb;--error:#f87171}*{box-sizing:border-box}body,html{margin:0;min-height:100%;font-family:system-ui,-apple-system,Segoe UI,Roboto,sans-serif;background:var(--bg);color:var(--text)}a{color:var(--primary)}button,input{font:inherit}button{cursor:pointer}.realtime-toast-stack{position:fixed;bottom:1.25rem;right:1.25rem;z-index:9999;display:flex;flex-direction:column;gap:.5rem;max-width:min(360px,calc(100vw - 2rem));pointer-events:none}.kpiGrid{display:grid;grid-template-columns:repeat(auto-fill,minmax(140px,1fr));grid-gap:.75rem;gap:.75rem}.chartGrid{display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));grid-gap:1rem;gap:1rem}.realtime-toast{padding:.75rem 1rem;background:var(--surface);border:1px solid var(--border);border-radius:8px;box-shadow:0 8px 24px rgba(0,0,0,.35);font-size:.9rem;color:var(--text)}