:root{--bg:#f6f7fb;--card-bg:#fff;--surface:#fff;--text:#1f2937;--muted-text:#6b7280;--border:#e5e7eb;--primary:#2563eb;--secondary:#4b5563;--danger:#dc2626;font-family:Inter,Segoe UI,Roboto,Helvetica,Arial,sans-serif}*,:before,:after{box-sizing:border-box}body{background:var(--bg);color:var(--text);margin:0}body.dark-mode{--bg:#0b1020;--card-bg:#121a2f;--surface:#1b2741;--text:#e5e7eb;--muted-text:#94a3b8;--border:#2b395b;--primary:#3b82f6;--secondary:#6b7280;--danger:#ef4444}#root{min-height:100vh}h1,h2{margin:0}.app{max-width:1100px;margin:0 auto;padding:1.25rem}.app-header{margin-bottom:1rem}.app-header p{color:var(--muted-text);margin:.5rem 0 .9rem}.grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:1rem;margin-bottom:1rem;display:grid}.card{background:var(--card-bg);border:1px solid var(--border);border-radius:14px;padding:1rem}.stack{gap:.7rem;display:grid}input,select,button{font:inherit}input,select{border:1px solid var(--border);background:var(--surface);color:var(--text);border-radius:8px;padding:.6rem .7rem}button{background:var(--primary);color:#fff;cursor:pointer;border:none;border-radius:8px;padding:.58rem .8rem}button:disabled{opacity:.6;cursor:not-allowed}.btn-secondary{background:var(--secondary)}.danger{background:var(--danger)}.list{gap:.6rem;margin:.9rem 0 0;padding:0;list-style:none;display:grid}.list li{border:1px solid var(--border);background:var(--surface);border-radius:10px;justify-content:space-between;align-items:center;gap:.8rem;padding:.55rem .7rem;display:flex}.split-grid{gap:.5rem;display:grid}.split-grid label{gap:.25rem;font-size:.92rem;display:grid}.positive{color:#16a34a}.negative{color:#dc2626}.muted{color:var(--muted-text);margin:.2rem 0 0;font-size:.85rem}.chart-card{min-height:360px}.action-row{flex-wrap:wrap;gap:.5rem;display:flex}.history li{align-items:flex-start}@media (width<=768px){.grid{grid-template-columns:1fr}}