/* ============================================================
   Bahi Khata — App Design System (Light Theme)
   Clean, professional light UI with Inter font
   ============================================================ */

/* ── Tokens ─────────────────────────────────────────────── */
:root {
  /* Background layers */
  --bg-base:      #f4f6fb;
  --bg-surface:   #ffffff;
  --bg-elevated:  #f8faff;
  --bg-card:      #ffffff;
  --bg-input:     #ffffff;
  --bg-hover:     rgba(79, 84, 201, 0.05);
  --bg-stripe:    rgba(79, 84, 201, 0.02);

  /* Accent palette */
  --indigo:       #4f54c9;
  --indigo-dim:   #3d42a8;
  --indigo-light: #eef0ff;
  --indigo-glow:  rgba(79, 84, 201, 0.1);
  --amber:        #d97706;
  --amber-light:  #fffbeb;
  --emerald:      #059669;
  --emerald-light:#ecfdf5;
  --rose:         #dc2626;
  --rose-light:   #fef2f2;
  --sky:          #0284c7;
  --sky-light:    #f0f9ff;

  /* Text */
  --text-primary:   #111827;
  --text-secondary: #4b5563;
  --text-muted:     #9ca3af;
  --text-inverse:   #ffffff;

  /* Borders */
  --border:         #e5e7eb;
  --border-focus:   #4f54c9;
  --border-strong:  #d1d5db;

  /* Shadows */
  --shadow-xs: 0 1px 2px rgba(0,0,0,0.05);
  --shadow-sm: 0 1px 4px rgba(0,0,0,0.08), 0 1px 2px rgba(0,0,0,0.04);
  --shadow-md: 0 4px 12px rgba(0,0,0,0.08), 0 2px 4px rgba(0,0,0,0.04);
  --shadow-lg: 0 10px 28px rgba(0,0,0,0.10), 0 4px 8px rgba(0,0,0,0.04);

  /* Sidebar */
  --sidebar-w: 240px;
  --topbar-h:  56px;

  /* Transitions */
  --dur:  0.15s;
  --ease: cubic-bezier(0.4, 0, 0.2, 1);
}

/* ── Reset & Base ───────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html { font-size: 15px; scroll-behavior: smooth; }

body {
  font-family: 'Inter', system-ui, -apple-system, sans-serif;
  background: var(--bg-base);
  color: var(--text-primary);
  line-height: 1.6;
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
}

a { color: var(--indigo); text-decoration: none; transition: color var(--dur) var(--ease); }
a:hover { color: var(--indigo-dim); }

img { max-width: 100%; }

/* ── Scrollbar ──────────────────────────────────────────── */
::-webkit-scrollbar { width: 6px; height: 6px; }
::-webkit-scrollbar-track { background: var(--bg-base); }
::-webkit-scrollbar-thumb { background: var(--border-strong); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: #adb5bd; }

/* ── App Layout ─────────────────────────────────────────── */
.app-wrapper {
  display: flex;
  min-height: 100vh;
}

/* ── Sidebar ────────────────────────────────────────────── */
.sidebar {
  width: var(--sidebar-w);
  min-height: 100vh;
  background: var(--bg-surface);
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  position: fixed;
  top: 0; left: 0;
  z-index: 100;
  box-shadow: var(--shadow-sm);
  transition: transform var(--dur) var(--ease);
}

.sidebar-brand {
  padding: 18px 20px 14px;
  border-bottom: 1px solid var(--border);
}
.sidebar-brand .brand-name {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--indigo);
  letter-spacing: -0.3px;
}
.sidebar-brand .brand-sub {
  font-size: 0.7rem;
  color: var(--text-muted);
  letter-spacing: 0.3px;
  margin-top: 2px;
  font-weight: 500;
}

.sidebar-nav {
  padding: 10px 10px;
  flex: 1;
  overflow-y: auto;
}

.nav-section-title {
  font-size: 0.65rem;
  font-weight: 700;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 1px;
  padding: 12px 10px 5px;
}

.nav-item {
  display: flex;
  align-items: center;
  gap: 9px;
  padding: 8px 12px;
  border-radius: 7px;
  color: var(--text-secondary);
  font-size: 0.86rem;
  font-weight: 500;
  transition: background var(--dur), color var(--dur);
  cursor: pointer;
  margin-bottom: 1px;
}
.nav-item:hover { background: var(--indigo-light); color: var(--indigo); }
.nav-item.active {
  background: var(--indigo-light);
  color: var(--indigo);
  font-weight: 600;
}
.nav-item .nav-icon { font-size: 0.95rem; width: 18px; text-align: center; flex-shrink: 0; }

.sidebar-footer {
  padding: 10px 12px;
  border-top: 1px solid var(--border);
}

/* ── Main Content ───────────────────────────────────────── */
.main-content {
  margin-left: var(--sidebar-w);
  flex: 1;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* ── Topbar ─────────────────────────────────────────────── */
.topbar {
  height: var(--topbar-h);
  background: var(--bg-surface);
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 24px;
  position: sticky;
  top: 0;
  z-index: 50;
}
.topbar-title {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text-primary);
}
.topbar-actions { display: flex; align-items: center; gap: 12px; }
.topbar-user {
  font-size: 0.8rem;
  color: var(--text-secondary);
  font-weight: 500;
}

/* ── Page Body ──────────────────────────────────────────── */
.page-body {
  padding: 24px;
  flex: 1;
  animation: fadeIn 0.2s var(--ease);
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(4px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* ── Page Header ────────────────────────────────────────── */
.page-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 22px;
  gap: 12px;
  flex-wrap: wrap;
}
.page-header h1 {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text-primary);
  letter-spacing: -0.3px;
}
.page-header .page-sub {
  font-size: 0.81rem;
  color: var(--text-muted);
  margin-top: 2px;
}

/* ── Cards ──────────────────────────────────────────────── */
.card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 10px;
  overflow: hidden;
  box-shadow: var(--shadow-xs);
  transition: box-shadow var(--dur);
}
.card:hover { box-shadow: var(--shadow-sm); }

.card-header {
  padding: 14px 20px;
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  background: var(--bg-elevated);
}
.card-title {
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--text-primary);
}
.card-body { padding: 20px; }

/* ── Stat Cards (Dashboard) ─────────────────────────────── */
.stat-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(210px, 1fr));
  gap: 14px;
  margin-bottom: 22px;
}

.stat-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 16px 18px;
  position: relative;
  overflow: hidden;
  transition: transform var(--dur), box-shadow var(--dur);
  box-shadow: var(--shadow-xs);
}
.stat-card::after {
  content: '';
  position: absolute;
  top: 0; left: 0;
  width: 4px;
  height: 100%;
}
.stat-card:hover { transform: translateY(-1px); box-shadow: var(--shadow-sm); }

.stat-card.indigo::after  { background: var(--indigo); }
.stat-card.amber::after   { background: var(--amber); }
.stat-card.emerald::after { background: var(--emerald); }
.stat-card.rose::after    { background: var(--rose); }
.stat-card.sky::after     { background: var(--sky); }

.stat-icon { font-size: 1.3rem; margin-bottom: 10px; }
.stat-label {
  font-size: 0.7rem;
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.7px;
  margin-bottom: 3px;
}
.stat-value {
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--text-primary);
  font-variant-numeric: tabular-nums;
  letter-spacing: -0.5px;
}
.stat-sub {
  font-size: 0.74rem;
  color: var(--text-muted);
  margin-top: 4px;
}
.stat-tax-row {
  display: flex;
  justify-content: space-between;
  font-size: 0.75rem;
  color: var(--text-muted);
  margin-top: 6px;
  padding-top: 6px;
  border-top: 1px solid var(--border);
}

/* ── Buttons ────────────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 7px 14px;
  border-radius: 7px;
  font-size: 0.84rem;
  font-weight: 600;
  font-family: inherit;
  cursor: pointer;
  border: 1px solid transparent;
  transition: all var(--dur) var(--ease);
  white-space: nowrap;
  text-decoration: none;
  line-height: 1.4;
}

.btn-primary {
  background: var(--indigo);
  color: #fff;
  border-color: var(--indigo);
  box-shadow: 0 1px 3px rgba(79,84,201,0.25);
}
.btn-primary:hover { background: var(--indigo-dim); border-color: var(--indigo-dim); color: #fff; }

.btn-secondary {
  background: var(--bg-surface);
  color: var(--text-secondary);
  border-color: var(--border-strong);
}
.btn-secondary:hover { background: var(--bg-elevated); color: var(--text-primary); }

.btn-success {
  background: var(--emerald);
  color: #fff;
  border-color: var(--emerald);
}
.btn-success:hover { background: #047857; color: #fff; }

.btn-danger {
  background: transparent;
  color: var(--rose);
  border-color: var(--rose);
}
.btn-danger:hover { background: var(--rose); color: #fff; }

.btn-ghost {
  background: transparent;
  color: var(--text-secondary);
  border-color: var(--border);
}
.btn-ghost:hover { background: var(--bg-elevated); color: var(--text-primary); border-color: var(--border-strong); }

.btn-sm { padding: 5px 10px; font-size: 0.78rem; border-radius: 6px; }
.btn-icon { padding: 5px 7px; }

/* ── Badges ─────────────────────────────────────────────── */
.badge {
  display: inline-flex;
  align-items: center;
  padding: 2px 7px;
  border-radius: 20px;
  font-size: 0.68rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.4px;
  border: 1px solid transparent;
}
.badge-success { background: var(--emerald-light); color: var(--emerald);  border-color: #a7f3d0; }
.badge-warning { background: var(--amber-light);   color: var(--amber);    border-color: #fde68a; }
.badge-danger  { background: var(--rose-light);    color: var(--rose);     border-color: #fecaca; }
.badge-gray    { background: #f3f4f6;              color: #6b7280;         border-color: var(--border); }
.badge-indigo  { background: var(--indigo-light);  color: var(--indigo);   border-color: #c7d2fe; }
.badge-b2b     { background: var(--sky-light);     color: var(--sky);      border-color: #bae6fd; }
.badge-b2c     { background: var(--amber-light);   color: var(--amber);    border-color: #fde68a; }

/* ── Tables ─────────────────────────────────────────────── */
.table-wrapper {
  overflow-x: auto;
  border-radius: 10px;
  border: 1px solid var(--border);
}

.data-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.84rem;
}
.data-table thead th {
  background: var(--bg-elevated);
  color: var(--text-secondary);
  font-size: 0.71rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  padding: 10px 14px;
  text-align: left;
  border-bottom: 1px solid var(--border);
  white-space: nowrap;
}
.data-table thead th.r { text-align: right; }
.data-table thead th.c { text-align: center; }

.data-table tbody td {
  padding: 10px 14px;
  border-bottom: 1px solid var(--border);
  color: var(--text-primary);
  vertical-align: middle;
}
.data-table tbody tr:last-child td { border-bottom: 0; }
.data-table tbody tr { transition: background var(--dur); }
.data-table tbody tr:hover { background: var(--bg-hover); }
.data-table tbody tr:nth-child(even) td { background: var(--bg-stripe); }

.data-table .r { text-align: right; font-variant-numeric: tabular-nums; }
.data-table .c { text-align: center; }
.data-table tfoot td {
  padding: 10px 14px;
  background: var(--bg-elevated);
  font-weight: 700;
  color: var(--text-primary);
  border-top: 2px solid var(--border-strong);
  font-variant-numeric: tabular-nums;
}
.data-table tfoot .r { text-align: right; }

/* ── Forms ──────────────────────────────────────────────── */
.form-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: 16px;
}
.form-grid-2 { grid-template-columns: repeat(2, 1fr); }
.form-grid-3 { grid-template-columns: repeat(3, 1fr); }

.form-group { display: flex; flex-direction: column; gap: 5px; }
.form-group.full { grid-column: 1 / -1; }

.form-label {
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--text-secondary);
}
.form-label .req { color: var(--rose); margin-left: 2px; }

.form-control,
.form-select {
  background: var(--bg-input);
  border: 1px solid var(--border-strong);
  border-radius: 7px;
  padding: 8px 11px;
  font-size: 0.87rem;
  font-family: inherit;
  color: var(--text-primary);
  transition: border-color var(--dur), box-shadow var(--dur);
  width: 100%;
}
.form-control::placeholder { color: var(--text-muted); }
.form-control:focus,
.form-select:focus {
  outline: none;
  border-color: var(--indigo);
  box-shadow: 0 0 0 3px var(--indigo-glow);
}
.form-control[readonly] { background: var(--bg-elevated); color: var(--text-muted); cursor: default; }
.form-select option { background: #fff; color: var(--text-primary); }

textarea.form-control { resize: vertical; min-height: 72px; }

.form-hint {
  font-size: 0.73rem;
  color: var(--text-muted);
}

/* ── Invoice Line-Item Table ────────────────────────────── */
.invoice-lines {
  width: 100%;
  border-collapse: separate;
  border-spacing: 0 3px;
  font-size: 0.83rem;
}
.invoice-lines thead th {
  padding: 7px 8px;
  color: var(--text-muted);
  font-size: 0.67rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.4px;
  border-bottom: 1px solid var(--border);
  background: transparent;
}
.invoice-lines thead th.r { text-align: right; }
.invoice-lines thead th.c { text-align: center; }

.line-row td { padding: 3px 3px; vertical-align: middle; }
.line-row .form-control {
  padding: 6px 8px;
  font-size: 0.82rem;
  border-radius: 6px;
  border-color: var(--border);
}
.line-row .form-control:focus { border-color: var(--indigo); }
.line-row .calc-field {
  background: var(--bg-elevated);
  border-color: var(--border);
  color: var(--text-secondary);
  cursor: default;
  font-variant-numeric: tabular-nums;
}
.line-add-btn { margin-top: 10px; font-size: 0.82rem; }

/* Invoice totals box */
.invoice-totals {
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: 9px;
  padding: 16px 20px;
  margin-top: 16px;
}
.invoice-totals .totals-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
  gap: 12px;
}
.totals-item .tl { font-size: 0.7rem; color: var(--text-muted); text-transform: uppercase; font-weight: 700; }
.totals-item .tv { font-size: 1.05rem; font-weight: 700; font-variant-numeric: tabular-nums; color: var(--text-primary); }
.grand-total-row {
  margin-top: 12px;
  padding-top: 12px;
  border-top: 1px solid var(--border);
  display: flex;
  justify-content: space-between;
  align-items: baseline;
}
.grand-total-row .gt-label { font-size: 0.9rem; font-weight: 600; color: var(--text-secondary); }
.grand-total-row .gt-value { font-size: 1.45rem; font-weight: 800; color: var(--indigo); }

/* ── Tax Type Banner ────────────────────────────────────── */
.tax-banner {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 9px 13px;
  border-radius: 7px;
  font-size: 0.83rem;
  font-weight: 600;
  border: 1px solid;
  margin-bottom: 12px;
}
.tax-banner.igst  { background: var(--sky-light);    border-color: #bae6fd; color: var(--sky); }
.tax-banner.cgst  { background: var(--indigo-light); border-color: #c7d2fe; color: var(--indigo); }

/* ── Alerts / Flash ─────────────────────────────────────── */
.alert {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  padding: 11px 15px;
  border-radius: 7px;
  font-size: 0.86rem;
  font-weight: 500;
  margin-bottom: 16px;
  animation: slideDown 0.18s var(--ease);
  border: 1px solid;
}
@keyframes slideDown {
  from { opacity: 0; transform: translateY(-5px); }
  to   { opacity: 1; transform: translateY(0); }
}
.alert-success { background: var(--emerald-light); border-color: #a7f3d0; color: #065f46; }
.alert-error   { background: var(--rose-light);    border-color: #fecaca; color: #991b1b; }
.alert-info    { background: var(--indigo-light);  border-color: #c7d2fe; color: var(--indigo-dim); }
.alert-warning { background: var(--amber-light);   border-color: #fde68a; color: #92400e; }

/* ── Filters Bar ────────────────────────────────────────── */
.filter-bar {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
  padding: 12px 14px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 9px;
  margin-bottom: 14px;
}
.filter-bar .form-control,
.filter-bar .form-select {
  padding: 6px 10px;
  font-size: 0.82rem;
  height: 34px;
  max-width: 200px;
}
.filter-bar .btn { height: 34px; padding: 0 12px; font-size: 0.82rem; }

/* ── Login page ─────────────────────────────────────────── */
.login-page {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, #eef2ff 0%, #f4f6fb 50%, #ecfdf5 100%);
}
.login-card {
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 36px 32px;
  width: 100%;
  max-width: 400px;
  box-shadow: var(--shadow-lg);
  animation: fadeIn 0.25s var(--ease);
}
.login-brand { text-align: center; margin-bottom: 28px; }
.login-brand .brand-icon { font-size: 2.2rem; margin-bottom: 8px; }
.login-brand .brand-name { font-size: 1.35rem; font-weight: 800; color: var(--indigo); letter-spacing: -0.5px; }
.login-brand .brand-sub  { font-size: 0.77rem; color: var(--text-muted); margin-top: 3px; }

/* ── Payment panel ──────────────────────────────────────── */
.payment-panel {
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: 9px;
  padding: 18px;
  margin-top: 20px;
}
.payment-panel h3 { font-size: 0.9rem; font-weight: 600; color: var(--text-primary); margin-bottom: 13px; }

/* ── Invoice view detail ────────────────────────────────── */
.inv-detail-header {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 22px;
  margin-bottom: 20px;
}
.inv-meta-block { display: flex; flex-direction: column; gap: 4px; }
.inv-meta-block .iml { font-size: 0.7rem; color: var(--text-muted); font-weight: 700; text-transform: uppercase; letter-spacing: 0.4px; }
.inv-meta-block .imv { font-size: 0.88rem; color: var(--text-primary); font-weight: 500; }
.inv-meta-block .imv.large { font-size: 1.1rem; font-weight: 700; color: var(--indigo); }

/* ── Tabs ───────────────────────────────────────────────── */
.tabs {
  display: flex;
  gap: 2px;
  border-bottom: 2px solid var(--border);
  margin-bottom: 18px;
}
.tab-btn {
  padding: 8px 16px;
  font-size: 0.84rem;
  font-weight: 600;
  color: var(--text-muted);
  border: none;
  background: transparent;
  border-bottom: 2px solid transparent;
  cursor: pointer;
  transition: all var(--dur);
  font-family: inherit;
  margin-bottom: -2px;
}
.tab-btn:hover { color: var(--text-primary); }
.tab-btn.active { color: var(--indigo); border-bottom-color: var(--indigo); }
.tab-panel { display: none; }
.tab-panel.active { display: block; animation: fadeIn 0.15s var(--ease); }

/* ── GST Summary ────────────────────────────────────────── */
.gst-overview {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: 14px;
  margin-bottom: 22px;
}
.gst-box {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 16px 18px;
  box-shadow: var(--shadow-xs);
}
.gst-box-title { font-size: 0.7rem; font-weight: 700; text-transform: uppercase; letter-spacing: 0.7px; color: var(--text-muted); margin-bottom: 11px; }
.gst-row { display: flex; justify-content: space-between; font-size: 0.83rem; padding: 3px 0; }
.gst-row .grl { color: var(--text-secondary); }
.gst-row .grv { font-weight: 600; font-variant-numeric: tabular-nums; color: var(--text-primary); }
.gst-total { border-top: 1px solid var(--border); margin-top: 7px; padding-top: 7px; font-weight: 700; }
.color-indigo  { color: var(--indigo) !important; }
.color-emerald { color: var(--emerald) !important; }
.color-rose    { color: var(--rose) !important; }
.color-amber   { color: var(--amber) !important; }

/* ── Ledger table ───────────────────────────────────────── */
.ledger-credit { color: var(--emerald); font-weight: 600; }
.ledger-debit  { color: var(--rose);    font-weight: 600; }
.ledger-balance { font-variant-numeric: tabular-nums; }

/* ── Autocomplete dropdown ──────────────────────────────── */
.autocomplete-wrap { position: relative; }
.autocomplete-list {
  position: absolute;
  top: 100%;
  left: 0;
  right: 0;
  z-index: 200;
  background: var(--bg-surface);
  border: 1px solid var(--border-strong);
  border-top: 0;
  border-radius: 0 0 7px 7px;
  max-height: 230px;
  overflow-y: auto;
  box-shadow: var(--shadow-md);
}
.autocomplete-item {
  padding: 8px 12px;
  font-size: 0.84rem;
  cursor: pointer;
  border-bottom: 1px solid var(--border);
  transition: background var(--dur);
  color: var(--text-primary);
}
.autocomplete-item:last-child { border-bottom: 0; }
.autocomplete-item:hover,
.autocomplete-item.focused { background: var(--bg-hover); }
.autocomplete-item .ac-sub { font-size: 0.72rem; color: var(--text-muted); margin-top: 1px; }

/* ── Empty state ────────────────────────────────────────── */
.empty-state {
  text-align: center;
  padding: 56px 20px;
  color: var(--text-muted);
}
.empty-state .empty-icon { font-size: 2.2rem; margin-bottom: 10px; opacity: 0.5; }
.empty-state p { font-size: 0.88rem; }

/* ── Breadcrumb ─────────────────────────────────────────── */
.breadcrumb {
  display: flex;
  align-items: center;
  gap: 5px;
  font-size: 0.79rem;
  color: var(--text-muted);
  margin-bottom: 14px;
}
.breadcrumb a { color: var(--text-secondary); }
.breadcrumb a:hover { color: var(--indigo); }
.breadcrumb .sep { opacity: 0.4; }

/* ── Section dividers ───────────────────────────────────── */
.section-divider {
  border: 0;
  border-top: 1px solid var(--border);
  margin: 20px 0;
}

/* ── Firm Info display ──────────────────────────────────── */
.firm-info-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 18px;
}
.firm-info-item .fil { font-size: 0.7rem; font-weight: 700; color: var(--text-muted); text-transform: uppercase; letter-spacing: 0.4px; margin-bottom: 3px; }
.firm-info-item .fiv { font-size: 0.9rem; color: var(--text-primary); font-weight: 500; }
.firm-info-item .fiv.large { font-size: 1.1rem; font-weight: 700; color: var(--indigo); }

/* ── Utility classes ────────────────────────────────────── */
.text-right  { text-align: right; }
.text-center { text-align: center; }
.text-muted  { color: var(--text-muted) !important; }
.text-sm     { font-size: 0.8rem; }
.text-xs     { font-size: 0.72rem; }
.font-mono   { font-variant-numeric: tabular-nums; }
.font-bold   { font-weight: 700; }
.mt-1 { margin-top: 6px; }
.mt-2 { margin-top: 12px; }
.mt-3 { margin-top: 20px; }
.mt-4 { margin-top: 28px; }
.mb-1 { margin-bottom: 6px; }
.mb-2 { margin-bottom: 12px; }
.mb-3 { margin-bottom: 20px; }
.d-flex { display: flex; }
.align-center { align-items: center; }
.gap-2 { gap: 8px; }
.gap-3 { gap: 14px; }
.flex-1 { flex: 1; }
.w-100 { width: 100%; }

/* ── Responsive ─────────────────────────────────────────── */
@media (max-width: 900px) {
  .sidebar { transform: translateX(-100%); }
  .sidebar.open { transform: translateX(0); }
  .main-content { margin-left: 0; }
  .stat-grid { grid-template-columns: repeat(2, 1fr); }
  .gst-overview { grid-template-columns: 1fr; }
  .inv-detail-header { grid-template-columns: 1fr; }
  .form-grid-3 { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 600px) {
  .stat-grid { grid-template-columns: 1fr; }
  .form-grid-2, .form-grid-3 { grid-template-columns: 1fr; }
  .page-body { padding: 14px; }
  .gst-overview { grid-template-columns: 1fr; }
}