:root {
  --bg: #f5f6f8;
  --surface: #ffffff;
  --surface-alt: #f0f1f4;
  --border: #e2e4e9;
  --text: #1a1d23;
  --text-muted: #6b7280;
  --brand: #2f6fed;
  --brand-contrast: #ffffff;
  --danger: #dc2626;
  --warning-bg: #fff4e5;
  --warning-text: #92400e;
  --radius: 10px;
  --shadow: 0 1px 3px rgba(16, 24, 40, 0.08);
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #14161a;
    --surface: #1c1f26;
    --surface-alt: #23262e;
    --border: #2c2f38;
    --text: #e7e9ec;
    --text-muted: #9099a6;
    --brand: #5b8def;
    --brand-contrast: #0b1020;
    --warning-bg: #3a2a12;
    --warning-text: #f5b862;
    --shadow: 0 1px 3px rgba(0, 0, 0, 0.4);
  }
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: -apple-system, "Segoe UI", Roboto, Inter, system-ui, sans-serif;
  background: var(--bg);
  color: var(--text);
  font-size: 15px;
  line-height: 1.5;
}

a { color: var(--brand); }

h1 { font-size: 1.5rem; margin: 0 0 1.25rem; }

.muted { color: var(--text-muted); }
.error { color: var(--danger); font-size: 0.9rem; }

.app-shell {
  display: grid;
  grid-template-columns: 220px 1fr;
  min-height: 100vh;
}
.app-shell.sidebar-collapsed {
  grid-template-columns: 60px 1fr;
}

.sidebar {
  background: var(--surface);
  border-right: 1px solid var(--border);
  padding: 1.25rem 0.75rem;
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
  overflow: hidden;
}

.sidebar-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 1rem;
  padding: 0 0.25rem;
}

.brand {
  font-weight: 700;
  font-size: 1.05rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  white-space: nowrap;
}

.sidebar-toggle {
  background: none;
  border: 1px solid var(--border);
  color: var(--text-muted);
  border-radius: 6px;
  width: 24px;
  height: 24px;
  line-height: 1;
  cursor: pointer;
  flex-shrink: 0;
  padding: 0;
}
.sidebar-toggle:hover { background: var(--surface-alt); color: var(--text); }

.nav-link {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  padding: 0.55rem 0.65rem;
  border-radius: var(--radius);
  color: var(--text);
  text-decoration: none;
  font-size: 0.92rem;
  white-space: nowrap;
}

.nav-link:hover { background: var(--surface-alt); }
.nav-link.active { background: var(--brand); color: var(--brand-contrast); }

.nav-icon { flex-shrink: 0; font-size: 1.05rem; line-height: 1; }

.logout-form { margin-top: auto; }

.link-button {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  background: none;
  border: none;
  color: var(--text-muted);
  cursor: pointer;
  padding: 0.55rem 0.65rem;
  font-size: 0.9rem;
  width: 100%;
  text-align: left;
  border-radius: var(--radius);
  white-space: nowrap;
}
.link-button:hover { background: var(--surface-alt); color: var(--text); }

.sidebar-collapsed .brand-text,
.sidebar-collapsed .nav-text {
  display: none;
}
.sidebar-collapsed .sidebar-top { justify-content: center; }
.sidebar-collapsed .brand { display: none; }
.sidebar-collapsed .nav-link,
.sidebar-collapsed .link-button {
  justify-content: center;
}

.content {
  padding: 2rem 2.5rem;
  max-width: 1100px;
}

.kpi-row {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
  margin-bottom: 1.5rem;
}

.kpi-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 1.1rem 1.4rem;
  min-width: 160px;
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}

.kpi-value { font-size: 1.6rem; font-weight: 700; }
.kpi-label { color: var(--text-muted); font-size: 0.85rem; }
.kpi-card.kpi-warning { background: var(--warning-bg); }
.kpi-card.kpi-warning .kpi-value,
.kpi-card.kpi-warning .kpi-label { color: var(--warning-text); }
.kpi-card.kpi-positive .kpi-value { color: #16a34a; }
.kpi-card.kpi-negative .kpi-value { color: var(--danger); }

.kpi-link {
  text-decoration: none;
  cursor: pointer;
  transition: transform 0.1s ease;
}
.kpi-link:hover { transform: translateY(-1px); box-shadow: 0 2px 6px rgba(16, 24, 40, 0.12); }

.chart-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
  margin-top: 0.5rem;
}
@media (max-width: 800px) {
  .chart-grid { grid-template-columns: 1fr; }
}

.chart-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 1.1rem 1.3rem;
  min-height: 280px;
}
.chart-card h2 {
  font-size: 0.95rem;
  margin: 0 0 0.75rem;
  color: var(--text-muted);
  font-weight: 600;
}
.chart-card canvas { max-height: 240px; }

.category-breakdown-list {
  margin-top: 1rem;
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}
.category-breakdown-row {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  padding: 0.35rem 0;
  border-bottom: 1px solid var(--border);
  font-size: 0.85rem;
}
.category-breakdown-row:last-child { border-bottom: none; }
.category-breakdown-swatch {
  width: 0.65rem;
  height: 0.65rem;
  border-radius: 50%;
  flex-shrink: 0;
}
.category-breakdown-name { flex: 1; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.category-breakdown-pct { font-size: 0.78rem; white-space: nowrap; }
.category-breakdown-value { font-weight: 600; white-space: nowrap; }

.login-screen {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--bg);
}

.login-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 2rem 2.25rem;
  width: 320px;
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
}

.login-card h1 { font-size: 1.2rem; margin: 0; }

input, select, button {
  font: inherit;
}

input[type="password"], input[type="text"], input[type="search"], select {
  padding: 0.55rem 0.65rem;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--surface-alt);
  color: var(--text);
}

button {
  cursor: pointer;
  border: none;
  border-radius: var(--radius);
  padding: 0.6rem 0.9rem;
  background: var(--brand);
  color: var(--brand-contrast);
  font-weight: 600;
}

button:hover { filter: brightness(1.05); }

table {
  width: 100%;
  border-collapse: collapse;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
}

th, td {
  text-align: left;
  padding: 0.6rem 0.75rem;
  border-bottom: 1px solid var(--border);
  font-size: 0.9rem;
}

th { color: var(--text-muted); font-weight: 600; }
tr:last-child td { border-bottom: none; }

.hidden { display: none !important; }

.page-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 1.25rem;
}
.page-header h1 { margin: 0; }

.secondary-button {
  background: var(--surface-alt);
  color: var(--text);
  border: 1px solid var(--border);
}

.danger-button {
  background: var(--danger);
  color: #ffffff;
}

.radio-option {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  font-weight: 400;
  margin: 0.3rem 0;
}

.badge {
  display: inline-block;
  font-size: 0.72rem;
  font-weight: 600;
  padding: 0.15rem 0.5rem;
  border-radius: 999px;
  background: var(--surface-alt);
  color: var(--text-muted);
}

/* Category tree */
.category-tree {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 0.5rem;
}

.cat-row {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  padding: 0.5rem 0.6rem;
  border-radius: var(--radius);
}
.cat-row:hover { background: var(--surface-alt); }

.cat-swatch {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  flex-shrink: 0;
}

.cat-name { flex: 1; font-weight: 500; }
.cat-name.cat-archived { color: var(--text-muted); text-decoration: line-through; }

.cat-actions {
  display: flex;
  gap: 0.75rem;
  opacity: 0;
  transition: opacity 0.1s;
}
.cat-row:hover .cat-actions { opacity: 1; }

.link-action {
  background: none;
  border: none;
  color: var(--brand);
  font-weight: 500;
  font-size: 0.82rem;
  padding: 0;
  cursor: pointer;
}
.link-action.danger-link { color: var(--danger); }

.badge-default {
  background: var(--brand);
  color: var(--brand-contrast);
}

.cat-add-row {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.5rem 0.6rem;
}
.cat-add-row .cat-add-input {
  flex: 1;
  min-width: 120px;
}
.cat-add-row .cat-add-icon {
  width: 3.5rem;
  flex: 0 0 auto;
}

/* Modal */
.modal-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.45);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 50;
}

.modal-card {
  background: var(--surface);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 1.5rem 1.75rem;
  width: 340px;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}
.modal-card h2 { margin: 0 0 0.5rem; font-size: 1.1rem; }
.modal-card-wide { width: 520px; max-width: 90vw; }

.similar-list {
  max-height: 320px;
  overflow-y: auto;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  margin: 0.5rem 0;
}
.similar-row {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  padding: 0.5rem 0.7rem;
  border-bottom: 1px solid var(--border);
  font-size: 0.85rem;
}
.similar-row:last-child { border-bottom: none; }
.similar-row .similar-desc { flex: 1; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.similar-row .similar-meta { color: var(--text-muted); font-size: 0.78rem; white-space: nowrap; }

.modal-actions {
  display: flex;
  justify-content: flex-end;
  gap: 0.5rem;
  margin-top: 0.75rem;
}

/* Filters bar (transactions) */
.filters-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
  align-items: end;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 0.9rem 1rem;
  margin-bottom: 1rem;
}
.filters-bar .field {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}
.filters-bar label { font-size: 0.78rem; color: var(--text-muted); }

.amount-positive { color: #16a34a; }
.amount-negative { color: var(--danger); }

.pagination {
  display: flex;
  gap: 0.5rem;
  align-items: center;
  margin-top: 0.75rem;
}

.upload-form {
  display: flex;
  gap: 0.5rem;
  align-items: center;
}

.import-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 1.25rem 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  max-width: 420px;
  margin-bottom: 1.5rem;
}
.import-card select,
.import-card input[type="file"] {
  padding: 0.5rem 0.6rem;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--surface-alt);
  color: var(--text);
}
.import-card button { align-self: flex-start; }

h2 { font-size: 1.1rem; margin: 1.5rem 0 0.75rem; }

.header-actions {
  display: flex;
  gap: 0.75rem;
  align-items: center;
  flex-wrap: wrap;
}

.bulk-bar {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  background: var(--surface-alt);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 0.6rem 0.9rem;
  margin-bottom: 0.75rem;
  font-size: 0.85rem;
}

td select {
  padding: 0.3rem 0.4rem;
  font-size: 0.82rem;
}

.icon-button {
  padding: 0.25rem 0.55rem;
  font-size: 0.85rem;
  line-height: 1;
  background: var(--surface-alt);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: var(--radius);
}
.icon-button:hover { background: var(--border); }

.cat-cell {
  display: flex;
  align-items: center;
  gap: 0.3rem;
}

.sub-name {
  font-size: 0.82rem;
  color: var(--text-muted);
  white-space: nowrap;
}

.card-label-input {
  padding: 0.4rem 0.5rem;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--surface-alt);
  color: var(--text);
  min-width: 220px;
}
.card-save-indicator {
  font-size: 0.78rem;
  margin-left: 0.4rem;
}