:root {
  --color-bg: #ffffff;
  --color-text: #1a1a1a;
  --color-muted: #555555;
  --color-border: #c2c2c2;
  --color-accent: #005a9c;
  --color-accent-hover: #004578;
  --color-error: #b00020;
  --color-error-bg: #fff5f7;
  --color-empty: #5a5a5a;
  --radius: 4px;
  --space-xs: 0.25rem;
  --space-sm: 0.5rem;
  --space-md: 1rem;
  --space-lg: 1.5rem;
  --space-xl: 2rem;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  font-size: 1rem;
  line-height: 1.5;
  color: var(--color-text);
  background: var(--color-bg);
}

.site-header,
.site-footer {
  padding: var(--space-lg) var(--space-xl);
  max-width: 1200px;
  margin: 0 auto;
}

.site-header h1 {
  margin: 0 0 var(--space-sm);
  font-size: 1.75rem;
}

.site-header p {
  margin: 0;
  color: var(--color-muted);
}

main {
  padding: 0 var(--space-xl) var(--space-xl);
  max-width: 1200px;
  margin: 0 auto;
}

.report-builder {
  display: flex;
  flex-direction: column;
  gap: var(--space-lg);
}

.field {
  display: flex;
  flex-direction: column;
  gap: var(--space-xs);
}

.field label {
  font-weight: 600;
  font-size: 0.875rem;
}

.field select,
.field input[type="text"],
.field input[type="date"] {
  padding: var(--space-sm) var(--space-md);
  font: inherit;
  color: inherit;
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
}

.field select:focus,
.field input:focus {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
}

.filters {
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: var(--space-lg);
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: var(--space-md);
}

.filters legend {
  font-weight: 600;
  padding: 0 var(--space-sm);
}

.filter-actions {
  grid-column: 1 / -1;
  display: flex;
  gap: var(--space-sm);
}

button {
  padding: var(--space-sm) var(--space-md);
  font: inherit;
  font-weight: 600;
  color: var(--color-text);
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  cursor: pointer;
}

button:hover {
  background: #f5f5f5;
}

button:focus {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
}

button:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

button.primary {
  color: #ffffff;
  background: var(--color-accent);
  border-color: var(--color-accent);
}

button.primary:hover {
  background: var(--color-accent-hover);
}

.controls {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-end;
  gap: var(--space-md);
  justify-content: space-between;
}

.actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-sm);
}

.status {
  padding: var(--space-md);
  border-radius: var(--radius);
  background: #f5f5f5;
}

.status.error {
  color: var(--color-error);
  background: var(--color-error-bg);
}

.status.empty {
  color: var(--color-empty);
  background: #fafafa;
  border: 1px dashed var(--color-border);
}

.table-wrap {
  overflow-x: auto;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
}

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.9375rem;
}

th,
td {
  padding: var(--space-sm) var(--space-md);
  text-align: left;
  border-bottom: 1px solid var(--color-border);
  white-space: nowrap;
}

th {
  font-weight: 600;
  background: #f5f5f5;
  position: sticky;
  top: 0;
}

tr:last-child td {
  border-bottom: none;
}

.pagination {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  justify-content: center;
}

.sort-info {
  font-size: 0.875rem;
  color: var(--color-muted);
}

@media (max-width: 600px) {
  .site-header,
  .site-footer,
  main {
    padding: var(--space-md);
  }

  .filters {
    grid-template-columns: 1fr;
  }

  .controls {
    flex-direction: column;
    align-items: stretch;
  }
}

.grouping {
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: var(--space-lg);
  display: flex;
  flex-wrap: wrap;
  align-items: flex-end;
  gap: var(--space-md);
}

.grouping legend {
  font-weight: 600;
  padding: 0 var(--space-sm);
}

.field .label {
  font-weight: 600;
  font-size: 0.875rem;
}

.quick-dates {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-sm);
}

.quick-dates button {
  font-size: 0.875rem;
  font-weight: 500;
  padding: var(--space-xs) var(--space-sm);
}

.metrics {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-sm) var(--space-md);
}

.metrics select {
  padding: var(--space-xs) var(--space-sm);
  font: inherit;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
}

.metric {
  display: inline-flex;
  align-items: center;
  gap: var(--space-xs);
  font-size: 0.875rem;
}

/* A field the chosen statistic cannot be applied to stays visible but inert,
   so the reader sees it was considered rather than wondering if it went missing. */
.metric.is-disabled {
  color: var(--color-muted);
}

.metric input:disabled {
  accent-color: var(--color-border);
}

.hint {
  flex-basis: 100%;
  margin: 0;
  font-size: 0.8125rem;
  color: var(--color-muted);
}