:root {
  --primary: #2563eb;
  --primary-hover: #1d4ed8;
  --bg: #f1f5f9;
  --card: #ffffff;
  --border: #e2e8f0;
  --text: #0f172a;
  --text-muted: #64748b;
  --success: #10b981;
  --danger: #ef4444;
  --warning: #f59e0b;
  --radius: 8px;
  --shadow: 0 1px 3px rgba(0,0,0,0.08), 0 1px 2px rgba(0,0,0,0.04);
}

* { box-sizing: border-box; margin: 0; padding: 0; }

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  background: var(--bg);
  color: var(--text);
  font-size: 14px;
  line-height: 1.5;
}

/* ── Nav ── */
nav {
  background: white;
  border-bottom: 1px solid var(--border);
  padding: 0 1.5rem;
  display: flex;
  align-items: center;
  height: 56px;
  gap: 0.25rem;
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: var(--shadow);
}

.nav-brand {
  font-weight: 700;
  font-size: 1.1rem;
  color: var(--primary);
  text-decoration: none;
  margin-right: 1rem;
  letter-spacing: -0.3px;
}

.nav-links {
  display: flex;
  gap: 0.125rem;
  flex: 1;
}

.nav-links a {
  padding: 0.4rem 0.75rem;
  border-radius: 6px;
  color: var(--text-muted);
  text-decoration: none;
  font-size: 0.875rem;
  font-weight: 500;
  transition: all 0.1s;
}

.nav-links a:hover { background: #f1f5f9; color: var(--text); }
.nav-links a.active { background: #eff6ff; color: var(--primary); }

.nav-user { margin-left: auto; }

/* ── Page Layout ── */
.page {
  max-width: 1200px;
  margin: 0 auto;
  padding: 1.5rem;
}

.page-header {
  margin-bottom: 1.5rem;
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
}

.page-title { font-size: 1.35rem; font-weight: 700; letter-spacing: -0.3px; }
.page-subtitle { color: var(--text-muted); font-size: 0.8125rem; margin-top: 0.2rem; }

/* ── Cards ── */
.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.25rem;
  box-shadow: var(--shadow);
}

.card-title {
  font-weight: 600;
  font-size: 0.9375rem;
  margin-bottom: 1rem;
  color: var(--text);
}

/* ── Stat Grid ── */
.stat-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 1rem;
  margin-bottom: 1.5rem;
}

.stat-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.25rem;
  box-shadow: var(--shadow);
}

.stat-label {
  font-size: 0.75rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  font-weight: 600;
}

.stat-value {
  font-size: 1.625rem;
  font-weight: 700;
  margin-top: 0.35rem;
  letter-spacing: -0.5px;
}

.stat-value.spent { color: var(--danger); }
.stat-value.income { color: var(--success); }

/* ── Tables ── */
.table-wrap { overflow-x: auto; }

table { width: 100%; border-collapse: collapse; }

th {
  text-align: left;
  padding: 0.6rem 1rem;
  border-bottom: 2px solid var(--border);
  color: var(--text-muted);
  font-weight: 600;
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  white-space: nowrap;
}

td {
  padding: 0.7rem 1rem;
  border-bottom: 1px solid var(--border);
  vertical-align: middle;
}

tr:last-child td { border-bottom: none; }
tbody tr:hover td { background: #f8fafc; cursor: pointer; }

.td-amount { text-align: right; font-variant-numeric: tabular-nums; white-space: nowrap; }
.amount-debit  { color: var(--danger);  font-weight: 600; }
.amount-credit { color: var(--success); font-weight: 600; }

/* ── Buttons ── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.375rem;
  padding: 0.5rem 1rem;
  border-radius: 6px;
  border: none;
  cursor: pointer;
  font-size: 0.875rem;
  font-weight: 500;
  text-decoration: none;
  transition: all 0.12s;
  white-space: nowrap;
}

.btn:disabled { opacity: 0.5; cursor: not-allowed; }
.btn-primary  { background: var(--primary); color: white; }
.btn-primary:hover:not(:disabled)  { background: var(--primary-hover); }
.btn-secondary { background: white; color: var(--text); border: 1px solid var(--border); }
.btn-secondary:hover:not(:disabled) { background: #f8fafc; }
.btn-danger   { background: var(--danger); color: white; }
.btn-danger:hover:not(:disabled)   { background: #dc2626; }
.btn-ghost    { background: transparent; color: var(--text-muted); }
.btn-ghost:hover:not(:disabled) { color: var(--danger); }
.btn-sm { padding: 0.3rem 0.6rem; font-size: 0.8rem; }

/* ── Forms ── */
.form-group { margin-bottom: 1rem; }

label {
  display: block;
  font-size: 0.8125rem;
  font-weight: 500;
  margin-bottom: 0.375rem;
  color: var(--text);
}

input[type=text],
input[type=date],
input[type=number],
select,
textarea {
  width: 100%;
  padding: 0.5rem 0.75rem;
  border: 1px solid var(--border);
  border-radius: 6px;
  font-size: 0.875rem;
  background: white;
  color: var(--text);
  transition: border-color 0.1s, box-shadow 0.1s;
}

input:focus, select:focus, textarea:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(37,99,235,0.1);
}

input[type=color] {
  width: 2.5rem;
  height: 2rem;
  padding: 0.1rem;
  border: 1px solid var(--border);
  border-radius: 6px;
  cursor: pointer;
}

/* ── Filter Bar ── */
.filter-bar {
  display: flex;
  gap: 0.75rem;
  margin-bottom: 1.25rem;
  flex-wrap: wrap;
  align-items: flex-end;
}

.filter-bar .form-group { margin-bottom: 0; min-width: 130px; }
.filter-bar select,
.filter-bar input { width: auto; min-width: 130px; }

/* ── Upload Zone ── */
.upload-zone {
  border: 2px dashed var(--border);
  border-radius: var(--radius);
  padding: 3rem 2rem;
  text-align: center;
  cursor: pointer;
  transition: all 0.15s;
  background: white;
}

.upload-zone:hover,
.upload-zone.drag-over {
  border-color: var(--primary);
  background: #eff6ff;
}

.upload-zone input[type=file] { display: none; }

.upload-icon { font-size: 2.5rem; margin-bottom: 0.75rem; opacity: 0.5; }
.upload-text { color: var(--text-muted); margin-bottom: 0.5rem; }
.upload-hint { font-size: 0.8rem; color: var(--text-muted); }

/* ── Badges ── */
.badge {
  display: inline-flex;
  align-items: center;
  padding: 0.2rem 0.55rem;
  border-radius: 100px;
  font-size: 0.75rem;
  font-weight: 500;
  white-space: nowrap;
}

/* ── Alert ── */
.alert {
  padding: 0.75rem 1rem;
  border-radius: 6px;
  margin-bottom: 1rem;
  font-size: 0.875rem;
}

.alert-success { background: #f0fdf4; color: #166534; border: 1px solid #bbf7d0; }
.alert-error   { background: #fef2f2; color: #991b1b; border: 1px solid #fecaca; }
.alert-info    { background: #eff6ff; color: #1e40af; border: 1px solid #bfdbfe; }

/* ── Spinner ── */
.spinner {
  display: inline-block;
  width: 18px; height: 18px;
  border: 2px solid var(--border);
  border-top-color: var(--primary);
  border-radius: 50%;
  animation: spin 0.7s linear infinite;
}

@keyframes spin { to { transform: rotate(360deg); } }

/* ── Empty State ── */
.empty-state {
  text-align: center;
  padding: 3rem 1rem;
  color: var(--text-muted);
}

.empty-state-icon { font-size: 2rem; opacity: 0.4; margin-bottom: 0.75rem; }

/* ── Two Column ── */
.two-col {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.5rem;
}

/* ── Category Bar ── */
.cat-bar-row {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 0.6rem;
}
.cat-bar-label { width: 140px; font-size: 0.8125rem; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.cat-bar-track { flex: 1; height: 8px; background: var(--border); border-radius: 4px; overflow: hidden; }
.cat-bar-fill  { height: 100%; border-radius: 4px; transition: width 0.5s; }
.cat-bar-amount { text-align: right; font-size: 0.8125rem; font-variant-numeric: tabular-nums; min-width: 70px; }

/* ── Rules list ── */
.rules-list { display: flex; flex-direction: column; gap: 0.5rem; }
.rule-row {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.5rem 0.75rem;
  background: #f8fafc;
  border: 1px solid var(--border);
  border-radius: 6px;
  font-size: 0.8125rem;
}
.rule-pattern { font-weight: 600; flex: 1; }
.rule-type { color: var(--text-muted); font-size: 0.75rem; }

/* ── Category Dot ── */
.cat-dot {
  display: inline-block;
  width: 10px; height: 10px;
  border-radius: 50%;
  flex-shrink: 0;
}

/* ── Pagination ── */
.pagination {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 1rem 0;
  font-size: 0.875rem;
  color: var(--text-muted);
}

/* ── Responsive ── */
@media (max-width: 768px) {
  .two-col { grid-template-columns: 1fr; }
  .stat-grid { grid-template-columns: 1fr 1fr; }
  nav { padding: 0 1rem; }
  .nav-links a { padding: 0.4rem 0.5rem; font-size: 0.8rem; }
  .page { padding: 1rem; }
  .page-header { flex-direction: column; align-items: flex-start; }
  th, td { padding: 0.5rem 0.75rem; }
}

@media (max-width: 480px) {
  .stat-grid { grid-template-columns: 1fr; }
  .filter-bar { flex-direction: column; }
  .filter-bar .form-group, .filter-bar select, .filter-bar input { width: 100%; }
}