/* Arithmetic accuracy explorer. Layout comes from .chart-frame and the
   .viz-* controls in the theme; this file adds the explorer's own parts. */

#arithmetic-explorer {
  /* Data colors, shared with COLORS in main.js */
  --positive: #c44e35;
  --negative: #087e8b;
  --exact: #f7f1e6;
  --missing: #d9dde0;

  font-variant-numeric: tabular-nums;
}

#arithmetic-explorer select:focus-visible,
#arithmetic-explorer a:focus-visible,
#arithmetic-explorer summary:focus-visible {
  outline: 3px solid var(--blue-700);
  outline-offset: 2px;
}

#arithmetic-explorer .is-hidden {
  display: none;
}

.explorer-status {
  margin: 0 0 1rem;
  color: var(--muted);
  font-family: var(--font-ui);
  font-size: 0.875rem;
}

/* Stats bar: the shared .viz-stats, fitted to four or five figures */
#weekly-summary {
  grid-template-columns: repeat(auto-fit, minmax(9rem, 1fr));
}

.viz-stat-note {
  color: var(--muted);
  font-size: 0.8125rem;
  line-height: 1.35;
}

.chart-card {
  margin-top: 2.5rem;
}

/* Title, then the legend beneath it */
.chart-heading {
  display: grid;
  gap: 0.5rem;
  margin-bottom: 0.75rem;
}

#arithmetic-explorer .chart-heading h3 {
  margin: 0;
}

.difference-legend {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 1rem;
  color: var(--muted);
  font-family: var(--font-ui);
  font-size: 0.8125rem;
}

.difference-legend span {
  display: inline-flex;
  gap: 0.375rem;
  align-items: center;
}

.legend-swatch {
  width: 0.875rem;
  height: 0.875rem;
  border: 1px solid rgb(0 0 0 / 0.2);
}

.legend-swatch.negative { background: var(--negative); }
.legend-swatch.positive { background: var(--positive); }
.legend-swatch.exact { background: var(--exact); }
.legend-swatch.missing { background: var(--missing); }

/* Charts draw at the card's width, with a floor; below it they scroll sideways */
.plot-container {
  min-height: 12rem;
  overflow-x: auto;
}

/* Table of the selected year */

.data-table-disclosure {
  margin-top: 1rem;
  border-top: 1px solid var(--gray-200);
  font-family: var(--font-ui);
}

.data-table-disclosure summary {
  padding-block: 0.75rem;
  font-weight: 600;
  cursor: pointer;
}

.table-scroll {
  max-height: 28rem;
  overflow: auto;
}

#arithmetic-explorer .table-scroll table {
  width: 100%;
  margin: 0;
  border-collapse: collapse;
  font-size: 0.875rem;
}

#arithmetic-explorer .table-scroll :is(th, td) {
  padding: 0.5rem 0.75rem;
  border-bottom: 1px solid var(--gray-200);
  text-align: right;
  white-space: nowrap;
}

#arithmetic-explorer .table-scroll :is(th, td):is(:first-child, :last-child) {
  text-align: left;
}

.table-scroll thead {
  position: sticky;
  top: 0;
  z-index: 1; /* keeps the header hint above the rows */
  background: var(--white);
}

/* Column hint: a "?" that shows its explanation on hover or keyboard focus */
.th-hint {
  position: relative;
  display: inline-flex;
  gap: 0.375rem;
  align-items: center;
}

.hint-button {
  width: 1.125rem;
  height: 1.125rem;
  border: 1px solid var(--gray-400);
  border-radius: 50%;
  background: var(--white);
  color: var(--gray-600);
  font-size: 0.6875rem;
  font-weight: 700;
  line-height: 1;
  cursor: help;
}

.hint-text {
  position: absolute;
  top: calc(100% + 0.375rem);
  right: 0; /* last column, so open leftward and stay inside the table */
  width: 16rem;
  padding: 0.5rem 0.75rem;
  border-radius: var(--radius);
  background: var(--gray-900);
  color: var(--white);
  font-size: 0.8125rem;
  font-weight: 400;
  line-height: 1.4;
  white-space: normal;
  text-align: left;
  visibility: hidden;
}

.th-hint:hover .hint-text,
.hint-button:focus-visible + .hint-text {
  visibility: visible;
}

.positive-value {
  color: var(--positive);
  font-weight: 700;
}

.negative-value {
  color: var(--negative);
  font-weight: 700;
}

.explorer-error {
  margin-block: 1rem;
  padding: 1rem;
  border: 1px solid #fecaca;
  border-radius: var(--radius-lg);
  background: #fef2f2;
  color: #7f1d1d;
}

.explorer-footer {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem 2rem;
  justify-content: space-between;
  margin-top: 1.25rem;
  padding-top: 1rem;
  border-top: 1px solid var(--gray-200);
  color: var(--muted);
  font-family: var(--font-ui);
  font-size: 0.8125rem;
}

.explorer-footer strong,
.explorer-footer span {
  display: block;
}

.explorer-footer strong {
  color: var(--gray-900);
}