:root{--color-bg:#f4f5f7;--color-surface:#fff;--color-border:#d9dce1;--color-text:#24292f;--color-text-muted:#6b7280;--color-primary:#2563eb;--color-primary-hover:#1d4ed8;--color-danger:#dc2626;--color-income:#15803d;--color-expense:#b91c1c;color:var(--color-text);background-color:var(--color-bg);font-family:Segoe UI,system-ui,Arial,sans-serif}*{box-sizing:border-box}body{min-height:100vh;margin:0}#root{max-width:960px;margin:0 auto;padding:1.5rem 1rem 3rem}h1{margin:0 0 1rem;font-size:1.6rem}h2{margin:0 0 .75rem;font-size:1.2rem}.tabs{border-bottom:2px solid var(--color-border);gap:.5rem;margin-bottom:1.5rem;display:flex}.tabs button{cursor:pointer;color:var(--color-text-muted);background:0 0;border:none;border-bottom:3px solid #0000;margin-bottom:-2px;padding:.6rem 1rem;font-size:1rem}.tabs button:hover{color:var(--color-text)}.tabs button.active{color:var(--color-primary);border-bottom-color:var(--color-primary);font-weight:600}.card{background:var(--color-surface);border:1px solid var(--color-border);border-radius:8px;margin-bottom:1.5rem;padding:1.25rem}.form-row{flex-wrap:wrap;align-items:flex-end;gap:.75rem;display:flex}.form-field{flex-direction:column;gap:.25rem;display:flex}.form-field label{color:var(--color-text-muted);font-size:.85rem}.form-field input,.form-field select{border:1px solid var(--color-border);background:var(--color-surface);border-radius:6px;padding:.5rem .6rem;font-size:.95rem}button.primary{background:var(--color-primary);color:#fff;cursor:pointer;border:none;border-radius:6px;padding:.55rem 1.1rem;font-size:.95rem}button.primary:hover{background:var(--color-primary-hover)}button.danger{color:var(--color-danger);border:1px solid var(--color-danger);cursor:pointer;background:0 0;border-radius:6px;padding:.3rem .7rem;font-size:.85rem}button.danger:hover{background:var(--color-danger);color:#fff}.table-wrapper{overflow-x:auto}table{border-collapse:collapse;width:100%;font-size:.95rem}th,td{text-align:left;border-bottom:1px solid var(--color-border);padding:.55rem .6rem}th{color:var(--color-text-muted);text-transform:uppercase;font-size:.85rem;font-weight:600}td.number,th.number{text-align:right}tr.grand-total td{border-top:2px solid var(--color-text);font-weight:700}.income{color:var(--color-income)}.expense{color:var(--color-expense)}.error-message{color:var(--color-danger);background:#fee2e2;border:1px solid #fca5a5;border-radius:6px;margin-bottom:1rem;padding:.6rem .9rem}.empty-message{color:var(--color-text-muted);padding:.5rem 0;font-style:italic}.badge{border-radius:999px;padding:.15rem .55rem;font-size:.8rem;font-weight:600;display:inline-block}.badge.income{background:#dcfce7}.badge.expense{background:#fee2e2}