:root{--bg:#f6f7f9;--card:#fff;--text:#1a1d21;--muted:#6b7280;--border:#e3e6ea;--accent:#2563eb;--accent-dark:#1d4ed8;--danger:#dc2626;--success:#15803d;--radius:10px}*{box-sizing:border-box}body{background:var(--bg);color:var(--text);margin:0;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,sans-serif;font-size:15px;line-height:1.5}.app{min-height:100vh}.topbar{background:var(--card);border-bottom:1px solid var(--border);justify-content:space-between;align-items:center;padding:14px 24px;display:flex;position:sticky;top:0}.topbar h1{margin:0;font-size:20px}.container{max-width:1080px;margin:0 auto;padding:24px}.card{background:var(--card);border:1px solid var(--border);border-radius:var(--radius);margin-bottom:20px;padding:20px}.card h2{margin:0 0 12px;font-size:18px}.card h3{margin:0 0 10px;font-size:15px}.muted{color:var(--muted)}.grid-2{grid-template-columns:1fr 1fr;gap:20px;display:grid}@media (width<=800px){.grid-2{grid-template-columns:1fr}}table{border-collapse:collapse;width:100%;font-size:14px}th,td{text-align:left;border-bottom:1px solid var(--border);padding:8px 10px}th{color:var(--muted);text-transform:uppercase;letter-spacing:.04em;font-size:12px;font-weight:600}tr.clickable{cursor:pointer}tr.clickable:hover td{background:#f0f4ff}.amount{font-variant-numeric:tabular-nums;text-align:right}.amount.owes{color:var(--danger);font-weight:600}.amount.paid{color:var(--success)}.balance-banner{border-radius:var(--radius);background:#fef2f2;border:1px solid #fecaca;align-items:baseline;gap:12px;margin-bottom:20px;padding:14px 18px;display:flex}.balance-banner.clear{background:#f0fdf4;border-color:#bbf7d0}.balance-banner .big{font-size:26px;font-weight:700}form.form{gap:10px;max-width:520px;display:grid}.form-row{grid-template-columns:1fr 1fr;gap:10px;display:grid}label.field{color:var(--muted);gap:4px;font-size:13px;display:grid}input,select,textarea{font:inherit;color:var(--text);border:1px solid var(--border);background:#fff;border-radius:6px;padding:8px 10px}input:focus,select:focus,textarea:focus{outline:2px solid var(--accent);outline-offset:-1px;border-color:var(--accent)}button{font:inherit;cursor:pointer;background:var(--accent);color:#fff;border:1px solid #0000;border-radius:6px;padding:8px 16px}button:hover:not(:disabled){background:var(--accent-dark)}button:disabled{opacity:.55;cursor:default}button.secondary{color:var(--text);border-color:var(--border);background:#fff}button.secondary:hover:not(:disabled){background:#f3f4f6}button.danger{background:var(--danger)}.alert{border-radius:6px;margin-bottom:14px;padding:10px 14px;font-size:14px}.alert.error{color:#991b1b;background:#fef2f2;border:1px solid #fecaca}.alert.ok{color:#166534;background:#f0fdf4;border:1px solid #bbf7d0}.toolbar{justify-content:space-between;align-items:center;gap:12px;margin-bottom:16px;display:flex}.doc-row{border-bottom:1px solid var(--border);justify-content:space-between;align-items:center;gap:10px;padding:8px 0;font-size:14px;display:flex}.doc-row:last-child{border-bottom:none}