:root{
  --bg:#f5f6f8;--surface:#fff;--text:#1c2128;--muted:#6b7280;--line:#e5e7eb;
  --accent:#2563eb;--accent-dark:#1d4ed8;--accent-soft:#eaf1fe;
  --fixed:#2563eb;--fixed-soft:#eaf1fe;
  --specific:#dc2626;--specific-soft:#fdeaea;
  --paid:#16a34a;--paid-soft:#eafaf0;
  --unpaid:#6b7280;--unpaid-soft:#f0f1f3;
  --danger:#b42318;
  --shadow:0 1px 2px rgba(16,24,32,.04), 0 8px 24px rgba(16,24,32,.06);
}
*{box-sizing:border-box}
body{margin:0;font-family:"Heebo",Arial,sans-serif;background:var(--bg);color:var(--text)}
button,input,select,textarea{font:inherit}
button{cursor:pointer}
header{background:var(--surface);border-bottom:1px solid var(--line);position:sticky;top:0;z-index:30}
.topbar{max-width:1100px;margin:auto;padding:16px 20px;display:flex;justify-content:space-between;align-items:center;gap:12px;flex-wrap:wrap}
h1{margin:0;font-size:21px;font-weight:700;letter-spacing:-.01em}
main{max-width:1100px;margin:20px auto;padding:0 16px 60px}
.panel{background:var(--surface);border:1px solid var(--line);border-radius:14px;box-shadow:var(--shadow);padding:20px;margin-bottom:16px}
.empty{text-align:center;color:var(--muted)}
.btn{border:1px solid var(--line);background:var(--surface);border-radius:9px;padding:9px 14px;font-size:14px;color:var(--text);transition:background .15s,border-color .15s}
.btn:hover{background:#fafbfc;border-color:#d1d5db}
.btn.primary{background:var(--accent);color:#fff;border-color:var(--accent)}
.btn.primary:hover{background:var(--accent-dark)}
.btn.danger{color:var(--danger);border-color:#fda29b}
.btn.small{padding:5px 10px;font-size:12.5px}
.authArea{display:flex;gap:8px;align-items:center;font-size:13px;color:var(--muted)}

.monthNav{display:flex;align-items:center;justify-content:center;gap:14px;margin-bottom:16px}
.monthNav h2{margin:0;font-size:19px;font-weight:700;min-width:170px;text-align:center}

.statGrid{display:grid;grid-template-columns:repeat(4,1fr);gap:12px}
.stat{background:var(--surface);border:1px solid var(--line);border-radius:12px;padding:14px;text-align:center}
.stat label{display:block;font-size:12px;color:var(--muted);margin-bottom:6px}
.stat .val{font-size:18px;font-weight:700}
.stat input{width:100%;text-align:center;border:1px solid var(--line);border-radius:8px;padding:6px;font-weight:700;font-size:16px}
.negative{color:var(--danger)}

.summaryGrid{display:grid;grid-template-columns:repeat(3,1fr);gap:12px}
.summaryItem{padding:12px;border-radius:10px;background:var(--bg)}
.summaryItem label{display:block;font-size:12px;color:var(--muted);margin-bottom:4px}
.summaryItem .val{font-size:17px;font-weight:700}
.shortageBanner{margin-top:12px;padding:12px 14px;border-radius:10px;background:var(--specific-soft);color:var(--danger);font-weight:600;text-align:center}

.addForm{display:flex;gap:8px;flex-wrap:wrap;align-items:flex-end}
.addForm .field{flex:1;min-width:120px}
.addForm label{display:block;font-size:12px;color:var(--muted);margin-bottom:4px}
.addForm input,.addForm select{width:100%;padding:9px 10px;border:1px solid var(--line);border-radius:8px}

table{width:100%;border-collapse:collapse}
th,td{padding:10px 8px;text-align:right;border-bottom:1px solid var(--line);font-size:14px}
th{color:var(--muted);font-weight:600;font-size:12.5px}
.badge{display:inline-block;padding:3px 10px;border-radius:20px;font-size:12px;font-weight:600}
.badge.fixed{background:var(--fixed-soft);color:var(--fixed)}
.badge.specific{background:var(--specific-soft);color:var(--specific)}
.badge.paid{background:var(--paid-soft);color:var(--paid);cursor:pointer}
.badge.unpaid{background:var(--unpaid-soft);color:var(--unpaid);cursor:pointer}
.rowActions{display:flex;gap:6px;justify-content:flex-end}
.editableName,.editableAmount{border:1px solid transparent;border-radius:6px;padding:3px 5px;background:transparent;width:100%}
.editableName:focus,.editableAmount:focus{border-color:var(--accent);outline:none;background:var(--surface)}

.expenseCards{display:none}
.expenseCard{background:var(--surface);border:1px solid var(--line);border-radius:12px;padding:12px;margin-bottom:10px;display:flex;flex-direction:column;gap:6px}
.expenseCard .top{display:flex;justify-content:space-between;align-items:center}
.expenseCard .name{font-weight:600}
.expenseCard .amount{font-weight:700;font-size:16px}
.expenseCard .bottom{display:flex;justify-content:space-between;align-items:center}

.modal{position:fixed;inset:0;background:rgba(16,24,32,.45);display:none;align-items:center;justify-content:center;z-index:100}
.modal.open{display:flex}
.modalCard{width:min(440px,95vw);background:var(--surface);border-radius:16px;padding:20px;box-shadow:var(--shadow)}
.modalTop{display:flex;justify-content:space-between;align-items:center;margin-bottom:12px}
.modalTop h3{margin:0}
.field{margin-bottom:10px}
.field label{display:block;font-size:12px;color:var(--muted);margin-bottom:4px;font-weight:500}
.field input,.field select{width:100%;padding:9px 10px;border:1px solid var(--line);border-radius:8px}
.status{font-size:12px;color:var(--muted);margin-top:8px}
.actions{display:flex;gap:8px;flex-wrap:wrap}
.checkboxField{display:flex;align-items:center;gap:8px;font-size:13px;color:var(--muted)}
.checkboxField input{width:auto}

.yearTable{overflow-x:auto}
.yearFooter{display:grid;grid-template-columns:repeat(3,1fr);gap:12px;margin-top:16px}

@media (max-width: 720px){
  .statGrid{grid-template-columns:repeat(2,1fr)}
  .summaryGrid{grid-template-columns:1fr 1fr}
  table{display:none}
  .expenseCards{display:block}
  .btn{padding:10px 14px}
}