:root {
  --bg: #f4f6fa;
  --panel: #ffffff;
  --ink: #18202f;
  --muted: #667085;
  --line: #e3e7ee;
  --brand: #2f5bea;
  --brand-ink: #ffffff;
  --credit: #0f7a55;
  --credit-bg: #e7f6ef;
  --debit: #c0362c;
  --debit-bg: #fdecea;
  --warn-bg: #fff6e0;
  --warn: #8a5a00;
  --side: #121a2c;
  --side-ink: #c7cfdf;
  --radius: 10px;
  --shadow: 0 1px 2px rgba(16, 24, 40, .06), 0 1px 3px rgba(16, 24, 40, .05);
}

* { box-sizing: border-box; }
html, body { margin: 0; }
body {
  font: 15px/1.5 system-ui, -apple-system, "Segoe UI", Roboto, "Noto Sans Sinhala", "Iskoola Pota", sans-serif;
  color: var(--ink);
  background: var(--bg);
}
a { color: var(--brand); text-decoration: none; }
a:hover { text-decoration: underline; }
h2 { font-size: 1.05rem; margin: 0 0 12px; }
h3 { font-size: .95rem; margin: 0 0 10px; }
.muted { color: var(--muted); }
.small { font-size: .85rem; }
.num, td.num, th.num { text-align: right; font-variant-numeric: tabular-nums; white-space: nowrap; }
.cr { color: var(--credit); }
.dr { color: var(--debit); }
.nowrap { white-space: nowrap; }

/* ---------- Layout ---------- */
.sidebar {
  position: fixed; inset: 0 auto 0 0; width: 232px;
  background: var(--side); color: var(--side-ink);
  display: flex; flex-direction: column; z-index: 30;
  transition: transform .2s ease;
}
.brand { display: flex; gap: 10px; align-items: center; padding: 18px 18px 14px; color: #fff; font-weight: 700; }
.brand:hover { text-decoration: none; }
.brand small { display: block; font-weight: 400; font-size: .75rem; color: var(--side-ink); }
.brand-mark {
  width: 34px; height: 34px; border-radius: 8px; background: var(--brand);
  display: grid; place-items: center; font-size: .8rem; letter-spacing: .5px;
}
.sidebar nav { flex: 1; overflow-y: auto; padding: 4px 10px; }
.sidebar nav a {
  display: block; padding: 8px 12px; margin: 1px 0; border-radius: 7px;
  color: var(--side-ink); font-size: .92rem;
}
.sidebar nav a:hover { background: rgba(255, 255, 255, .06); color: #fff; text-decoration: none; }
.sidebar nav a.active { background: var(--brand); color: #fff; }
.nav-group { font-size: .7rem; text-transform: uppercase; letter-spacing: .08em; color: #7c879d; padding: 14px 12px 4px; }
.sidebar-user { border-top: 1px solid rgba(255, 255, 255, .08); padding: 14px 18px; display: flex; justify-content: space-between; font-size: .85rem; gap: 8px; }
.sidebar-user a { color: #9fb4ff; }

.main { margin-left: 232px; min-height: 100vh; }
.topbar {
  display: flex; align-items: center; gap: 12px; flex-wrap: wrap;
  padding: 14px 28px; background: var(--panel); border-bottom: 1px solid var(--line);
  position: sticky; top: 0; z-index: 10;
}
.topbar h1 { font-size: 1.2rem; margin: 0; flex: 1; }
.topbar-actions { display: flex; gap: 8px; flex-wrap: wrap; }
.menu-btn { display: none; border: 0; background: none; font-size: 1.4rem; cursor: pointer; padding: 0 4px; }
.content { padding: 24px 28px 48px; max-width: 1280px; }
.overlay { display: none; }

@media (max-width: 900px) {
  .sidebar { transform: translateX(-100%); }
  .sidebar.open { transform: none; }
  .overlay.show { display: block; position: fixed; inset: 0; background: rgba(0, 0, 0, .35); z-index: 20; }
  .main { margin-left: 0; }
  .menu-btn { display: block; }
  .topbar { padding: 12px 16px; }
  .content { padding: 16px 16px 40px; }
}

/* ---------- Components ---------- */
.card {
  background: var(--panel); border: 1px solid var(--line); border-radius: var(--radius);
  box-shadow: var(--shadow); padding: 18px 20px; margin-bottom: 20px;
}
.card-head { display: flex; justify-content: space-between; align-items: center; gap: 10px; margin-bottom: 12px; flex-wrap: wrap; }
.card-head h2 { margin: 0; }

.grid { display: grid; gap: 20px; }
.grid-2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.grid-3 { grid-template-columns: 2fr 1fr; }
@media (max-width: 1000px) { .grid-2, .grid-3 { grid-template-columns: 1fr; } }

.stats { display: grid; grid-template-columns: repeat(auto-fit, minmax(190px, 1fr)); gap: 16px; margin-bottom: 20px; }
.stat {
  background: var(--panel); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 14px 18px; box-shadow: var(--shadow); border-top: 3px solid var(--line);
}
.stat .label { font-size: .8rem; color: var(--muted); }
.stat .value { font-size: 1.35rem; font-weight: 700; font-variant-numeric: tabular-nums; margin-top: 2px; }
.stat .sub { font-size: .8rem; color: var(--muted); }
.stat.s-cr { border-top-color: var(--credit); }
.stat.s-dr { border-top-color: var(--debit); }
.stat.s-brand { border-top-color: var(--brand); }
.stat.s-warn { border-top-color: #e0a100; }

.btn {
  display: inline-flex; align-items: center; gap: 6px; justify-content: center;
  padding: 8px 14px; border-radius: 8px; border: 1px solid var(--line);
  background: var(--panel); color: var(--ink); font: inherit; font-size: .9rem; font-weight: 500;
  cursor: pointer; white-space: nowrap; line-height: 1.3;
}
.btn:hover { text-decoration: none; background: #f7f8fb; }
.btn-primary { background: var(--brand); border-color: var(--brand); color: var(--brand-ink); }
.btn-primary:hover { background: #2549c7; }
.btn-credit { background: var(--credit); border-color: var(--credit); color: #fff; }
.btn-credit:hover { background: #0b6344; }
.btn-debit { background: var(--debit); border-color: var(--debit); color: #fff; }
.btn-debit:hover { background: #a02a22; }
.btn-danger { color: var(--debit); border-color: #f2c4c0; }
.btn-danger:hover { background: var(--debit-bg); }
.btn-sm { padding: 4px 10px; font-size: .82rem; }
.btn-link { border: 0; background: none; padding: 0; color: var(--brand); cursor: pointer; font: inherit; }
.btn-link.danger { color: var(--debit); }
form.inline { display: inline; margin: 0; }

.badge { display: inline-block; font-size: .75rem; padding: 2px 8px; border-radius: 999px; font-weight: 600; }
.badge-cr { background: var(--credit-bg); color: var(--credit); }
.badge-dr { background: var(--debit-bg); color: var(--debit); }
.badge-muted { background: #eef0f4; color: var(--muted); }
.badge-warn { background: var(--warn-bg); color: var(--warn); }

.alert { padding: 11px 14px; border-radius: 8px; margin-bottom: 16px; border: 1px solid; }
.alert-success { background: var(--credit-bg); border-color: #b5e2cf; color: #0b5a3f; }
.alert-error { background: var(--debit-bg); border-color: #f2c4c0; color: #8e2119; }
.alert-warn { background: var(--warn-bg); border-color: #f0d9a0; color: var(--warn); }
.alert ul { margin: 4px 0 0; padding-left: 20px; }

/* ---------- Tables ---------- */
.table-wrap { overflow-x: auto; margin: 0 -4px; }
table { width: 100%; border-collapse: collapse; }
th, td { padding: 9px 10px; border-bottom: 1px solid var(--line); text-align: left; vertical-align: top; }
th { font-size: .75rem; text-transform: uppercase; letter-spacing: .04em; color: var(--muted); font-weight: 600; background: #f8f9fc; }
tbody tr:hover { background: #fafbfd; }
tfoot td { font-weight: 700; background: #f8f9fc; }
tr.row-muted td { color: var(--muted); font-style: italic; }
td.actions { white-space: nowrap; text-align: right; }
td.actions > * + * { margin-left: 10px; }
.empty { text-align: center; color: var(--muted); padding: 28px 10px; }

/* ---------- Forms ---------- */
label { display: block; font-size: .82rem; font-weight: 600; color: #344054; margin-bottom: 4px; }
input[type=text], input[type=date], input[type=month], input[type=number], input[type=email],
input[type=password], input[type=search], select, textarea {
  width: 100%; padding: 8px 10px; border: 1px solid #cfd5df; border-radius: 8px;
  font: inherit; background: #fff; color: var(--ink);
}
input:focus, select:focus, textarea:focus { outline: 2px solid rgba(47, 91, 234, .25); border-color: var(--brand); }
textarea { min-height: 70px; resize: vertical; }
.form-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(180px, 1fr)); gap: 14px 16px; }
.form-grid .span-2 { grid-column: span 2; }
.form-grid .span-all { grid-column: 1 / -1; }
@media (max-width: 560px) { .form-grid .span-2 { grid-column: 1 / -1; } }
.form-actions { display: flex; gap: 10px; margin-top: 18px; flex-wrap: wrap; align-items: center; }
.check { display: flex; align-items: center; gap: 8px; font-weight: 500; }
.check input { width: auto; }
.hint { font-size: .78rem; color: var(--muted); margin-top: 3px; font-weight: 400; }

.type-toggle { display: flex; gap: 8px; }
.type-toggle label {
  flex: 1; margin: 0; border: 1px solid #cfd5df; border-radius: 8px; padding: 9px 12px;
  cursor: pointer; display: flex; gap: 8px; align-items: center; font-weight: 600;
}
.type-toggle input { width: auto; margin: 0; }
.type-toggle label:has(input[value=credit]:checked) { border-color: var(--credit); background: var(--credit-bg); color: var(--credit); }
.type-toggle label:has(input[value=debit]:checked) { border-color: var(--debit); background: var(--debit-bg); color: var(--debit); }

.toolbar { display: flex; gap: 10px; align-items: flex-end; flex-wrap: wrap; margin-bottom: 18px; }
.toolbar .field { min-width: 150px; }
.toolbar .field.grow { flex: 1; min-width: 200px; }

details.add-box { margin-bottom: 20px; }
details.add-box > summary { cursor: pointer; list-style: none; display: inline-flex; }
details.add-box > summary::-webkit-details-marker { display: none; }
details.add-box[open] > summary { margin-bottom: 14px; }

/* ---------- Overview chart ---------- */
.bars { display: flex; gap: 6px; align-items: flex-end; height: 200px; padding-top: 8px; }
.bar-group { flex: 1; display: flex; flex-direction: column; align-items: center; height: 100%; min-width: 0; color: var(--muted); }
.bar-group:hover { text-decoration: none; }
.bar-pair { flex: 1; width: 100%; display: flex; gap: 2px; align-items: flex-end; justify-content: center; border-bottom: 1px solid var(--line); }
.bar { width: 42%; max-width: 18px; border-radius: 3px 3px 0 0; min-height: 1px; }
.bar.cr { background: var(--credit); }
.bar.dr { background: var(--debit); }
.bar-group:hover .bar { opacity: .75; }
.bar-label { font-size: .72rem; margin-top: 4px; }
.legend { display: flex; gap: 14px; font-size: .8rem; color: var(--muted); }
.legend i { display: inline-block; width: 10px; height: 10px; border-radius: 2px; margin-right: 5px; vertical-align: -1px; }

.meter { height: 6px; background: #eef0f4; border-radius: 99px; overflow: hidden; margin-top: 4px; }
.meter span { display: block; height: 100%; }

.info-list { display: grid; grid-template-columns: auto 1fr; gap: 6px 16px; margin: 0; }
.info-list dt { color: var(--muted); font-size: .85rem; }
.info-list dd { margin: 0; }

/* ---------- Login / install ---------- */
.auth-page { min-height: 100vh; display: grid; place-items: center; padding: 20px; background: linear-gradient(160deg, #121a2c, #25345a); }
.auth-card { width: 100%; max-width: 400px; background: #fff; border-radius: 14px; padding: 30px; box-shadow: 0 20px 50px rgba(0, 0, 0, .25); }
.auth-card.wide { max-width: 520px; }
.auth-card h1 { font-size: 1.35rem; margin: 10px 0 4px; }
.auth-card .form-row { margin-bottom: 14px; }
.auth-card .btn { width: 100%; padding: 10px; }

/* ---------- Print ---------- */
.print-head { display: none; }
@media print {
  body { background: #fff; font-size: 12px; }
  .sidebar, .topbar, .overlay, .no-print, .toolbar, details.add-box, td.actions, th.actions, .alert { display: none !important; }
  .main { margin: 0; }
  .content { padding: 0; max-width: none; }
  .card, .stat { box-shadow: none; border-color: #ccc; break-inside: avoid; }
  .print-head { display: flex; justify-content: space-between; border-bottom: 2px solid #000; padding-bottom: 6px; margin-bottom: 14px; font-size: 14px; }
  a { color: inherit; }
}