:root {
  color-scheme: light dark;
  font-family: Arial, sans-serif;
  --bg: #f8fafc;
  --surface: #ffffff;
  --surface-soft: #f8fafc;
  --text: #0f172a;
  --text-muted: #475569;
  --border: #e2e8f0;
  --border-strong: #94a3b8;

  --primary: #2563eb;
  --primary-hover: #1d4ed8;
  --primary-soft: #dbeafe;
  --primary-soft-hover: #bfdbfe;
  --primary-contrast: #ffffff;

  --focus-ring: #2563eb;

  --success-bg: #dcfce7;
  --success-text: #166534;
  --info-bg: #dbeafe;
  --info-text: #1e3a8a;
  --danger-text: #b91c1c;
  --error-text: #991b1b;

  --header-bg: #0f172a;
  --header-text: #ffffff;
  --table-head-bg: #e2e8f0;
  --table-head-text: #0f172a;
  --sheet-section-bg: #dbeafe;
  --sheet-subtotal-bg: #cfe2ff;
  --sheet-total-bg: #bfdbfe;
  --sheet-zebra-bg: #f1f5f9;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
}

.page-header {
  padding: 1rem 1.25rem;
  background: var(--header-bg);
  color: var(--header-text);
}

.page-header h1 {
  margin: 0 0 0.35rem;
  font-size: 1.5rem;
}

.page-header p {
  margin: 0;
  opacity: 0.9;
}

.layout {
  padding: 1rem;
  display: grid;
  gap: 1rem;
}

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 1.1rem 1rem;
}

.card h2 {
  margin-top: 0;
  color: var(--text);
}

.grid {
  display: grid;
  gap: 0.75rem;
}

.two-col {
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
}

.three-col {
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
}

label {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
  font-size: 0.82rem;
  letter-spacing: 0.01em;
  text-transform: uppercase;
  color: var(--text-muted);
}

input,
button,
select {
  font: inherit;
}

input,
select {
  padding: 0.48rem 0.56rem;
  border-radius: 6px;
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--text);
  font-size: 0.92rem;
  text-transform: none;
  letter-spacing: normal;
}

.button-row {
  margin-top: 0.8rem;
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 1rem;
}

.tab-panel {
  display: none;
}

.tab-panel.is-active {
  display: block;
}

.tab-panel .grid.two-col {
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 0.65rem 0.75rem;
}

.split-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 0.8rem;
}

.sub-card {
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 0.75rem;
  background: var(--surface-soft);
}

.sub-card h3 {
  margin: 0 0 0.6rem;
  font-size: 0.95rem;
  color: var(--text);
}

.tab-btn {
  background: var(--primary-soft);
  border-color: var(--primary-soft-hover);
  color: var(--text);
}

.tab-btn.is-active {
  background: var(--primary);
  border-color: var(--primary);
  color: var(--primary-contrast);
}

button {
  border: 1px solid var(--border);
  border-radius: 6px;
  background: var(--surface-soft);
  padding: 0.42rem 0.7rem;
  cursor: pointer;
  color: var(--text);
  transition: background-color 120ms ease, border-color 120ms ease, color 120ms ease, transform 120ms ease;
}

button:hover {
  background: var(--primary-soft);
  border-color: var(--border-strong);
}

button:focus-visible {
  outline: 2px solid var(--focus-ring);
  outline-offset: 2px;
}

button:active {
  transform: translateY(1px);
}

.preset-btn {
  background: var(--primary-soft);
  border-color: var(--primary-soft-hover);
  color: var(--text);
}

.preset-btn:hover {
  background: var(--primary-soft-hover);
  border-color: var(--primary);
}

.preset-btn-primary {
  background: var(--primary-soft);
  border-color: var(--primary-soft-hover);
  color: var(--text);
}

.preset-btn-primary:hover {
  background: var(--primary-soft-hover);
  border-color: var(--primary);
}

.preset-btn.is-active {
  background: var(--primary);
  border-color: var(--primary-hover);
  color: var(--primary-contrast);
  box-shadow: 0 0 0 2px var(--focus-ring);
}

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

th,
td {
  border-bottom: 1px solid var(--border);
  padding: 0.44rem 0.56rem;
  text-align: left;
  font-size: 0.92rem;
  line-height: 1.25;
}

th {
  background: var(--table-head-bg);
  color: var(--table-head-text);
  font-size: 0.85rem;
  letter-spacing: 0.01em;
  text-transform: uppercase;
  font-weight: 700;
}

.money-col,
.money-cell {
  text-align: right;
  font-variant-numeric: tabular-nums;
}

th:last-child,
td:last-child {
  border-left: 1px solid var(--border-strong);
}

.sheet-section-row td {
  background: var(--sheet-section-bg);
  color: var(--text);
  font-weight: 700;
  border-top: 1px solid var(--border-strong);
  font-size: 0.84rem;
  text-transform: uppercase;
  letter-spacing: 0.02em;
  padding-top: 0.4rem;
  padding-bottom: 0.4rem;
}

.sheet-total-row td {
  font-weight: 800;
  border-top: 3px solid var(--primary);
  border-bottom: 1px solid var(--border-strong);
  background: var(--sheet-total-bg);
  color: var(--text);
  padding-top: 0.62rem;
  padding-bottom: 0.62rem;
}

.sheet-subtotal-row td {
  font-weight: 700;
  border-top: 1px solid var(--border-strong);
  border-bottom: 1px solid var(--border-strong);
  background: var(--sheet-subtotal-bg);
  color: var(--text);
}

.sheet-subtotal-row .money-cell,
.sheet-total-row .money-cell {
  font-size: 1rem;
}

.sheet-total-row .money-cell {
  font-size: 1.04rem;
}

.sheet-line-row td:first-child {
  color: var(--text-muted);
}

.factor-label {
  cursor: help;
  border-bottom: 1px dotted color-mix(in srgb, var(--text-muted) 55%, transparent 45%);
}

.sheet-line-row.is-alt td {
  background: var(--sheet-zebra-bg);
}

.variance-positive,
.variance-negative {
  color: var(--text);
}

.money-zero {
  color: var(--text-muted);
}

.kpi-grid {
  display: grid;
  gap: 0.75rem;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
}

.kpi {
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 0.75rem;
  background: var(--surface-soft);
}

.kpi h3 {
  margin: 0 0 0.4rem;
  font-size: 0.9rem;
}

.kpi p {
  margin: 0;
  font-size: 1.2rem;
  font-weight: 700;
}

.winner-banner {
  margin-bottom: 0.75rem;
  padding: 0.7rem 0.8rem;
  border-radius: 8px;
  font-weight: 700;
}

.winner-banner.win-bch {
  background: var(--success-bg);
  color: var(--success-text);
}

.winner-banner.win-used {
  background: var(--info-bg);
  color: var(--info-text);
}

.validation {
  color: var(--error-text);
  min-height: 1.2rem;
  margin: 0.55rem 0 0;
  font-size: 0.86rem;
}

.advanced-hidden,
.tab-hidden {
  display: none;
}

@media (max-width: 768px) {
  .page-header h1 {
    font-size: 1.25rem;
  }

  .tabs {
    gap: 0.4rem;
  }

  .tab-btn {
    font-size: 0.84rem;
    padding: 0.36rem 0.52rem;
  }
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0b1220;
    --surface: #111827;
    --surface-soft: #1f2937;
    --text: #e2e8f0;
    --text-muted: #94a3b8;
    --border: #334155;
    --border-strong: #64748b;

    --primary: #3b82f6;
    --primary-hover: #2563eb;
    --primary-soft: #1e3a8a;
    --primary-soft-hover: #1d4ed8;
    --primary-contrast: #ffffff;

    --focus-ring: #60a5fa;

    --success-bg: #14532d;
    --success-text: #bbf7d0;
    --info-bg: #1e3a8a;
    --info-text: #dbeafe;
    --danger-text: #fca5a5;
    --error-text: #fca5a5;
    --table-head-bg: #0f172a;
    --table-head-text: #cbd5e1;
    --sheet-section-bg: #1e293b;
    --sheet-subtotal-bg: #223658;
    --sheet-total-bg: #1d3a63;
    --sheet-zebra-bg: #172235;
  }

  body {
    background: var(--bg);
    color: var(--text);
  }

  .card {
    background: var(--surface);
    border-color: var(--border);
  }

  input,
  select {
    background: var(--surface);
    color: var(--text);
    border-color: var(--border-strong);
  }

  button {
    background: var(--surface-soft);
    color: var(--text);
    border-color: var(--border-strong);
  }

  button:hover {
    background: var(--primary-soft);
    border-color: var(--primary);
  }
}