/* History Lab.
 *
 * The page's job is to make a refusal as legible as a number. So an
 * unavailable cell is styled to read as a deliberate state, never as an
 * empty one -- a blank cell and a refused cell look identical at a glance
 * and only one of them is honest.
 */

.lab-block {
  margin: 0 0 2.75rem;
}

.lab-block h2 {
  margin: 0 0 0.6rem;
}

.lab-warning {
  border-left: 3px solid var(--accent, #c2603a);
  padding-left: 1rem;
}

.lab-emphasis {
  font-weight: 600;
}

/* Tables scroll inside their own wrapper; the page body must never scroll
 * sideways on a phone. */
.tblwrap {
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

.lab-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.92rem;
  min-width: 44rem;
}

.lab-table th,
.lab-table td {
  text-align: left;
  padding: 0.5rem 0.7rem;
  border-bottom: 1px solid var(--rule, rgba(128, 128, 128, 0.28));
  vertical-align: top;
}

.lab-table th {
  font-weight: 600;
  white-space: nowrap;
}

.lab-table .num,
.lab-table td.num {
  text-align: right;
  font-variant-numeric: tabular-nums;
}

/* An unavailable value is a state with a reason, not a gap. */
.lab-unavailable {
  font-style: italic;
  opacity: 0.85;
}

.lab-reason {
  display: block;
  font-size: 0.82rem;
  opacity: 0.8;
  margin-top: 0.15rem;
}

.lab-nojs {
  font-size: 0.9rem;
  opacity: 0.9;
}

.lab-controls {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  margin: 1.1rem 0;
}

.lab-field {
  display: flex;
  flex-direction: column;
  gap: 0.3rem;
  min-width: 12rem;
  flex: 1 1 12rem;
}

.lab-field label {
  font-size: 0.85rem;
  font-weight: 600;
}

.lab-field select {
  font: inherit;
  padding: 0.45rem 0.5rem;
  border: 1px solid var(--rule, rgba(128, 128, 128, 0.4));
  border-radius: 4px;
  background: var(--surface, transparent);
  color: inherit;
  /* 16px stops iOS Safari zooming the viewport on focus, which on a phone
   * reads as the page jumping away from the control just tapped. */
  font-size: 16px;
}

/* Focus must be visible for keyboard users on every interactive control,
 * and :focus-visible alone leaves older engines with nothing. */
.lab-field select:focus,
.lab-field select:focus-visible {
  outline: 2px solid var(--accent, #c2603a);
  outline-offset: 2px;
}

.lab-result-head {
  margin: 0.4rem 0 0.6rem;
}

.lab-links,
.lab-limits {
  margin: 0.5rem 0 0;
  padding-left: 1.2rem;
}

.lab-links li,
.lab-limits li {
  margin-bottom: 0.35rem;
}

.lab-provenance {
  display: grid;
  grid-template-columns: max-content 1fr;
  gap: 0.3rem 1rem;
  margin: 1rem 0 0.75rem;
  font-size: 0.88rem;
}

.lab-provenance dt {
  font-weight: 600;
}

.lab-provenance dd {
  margin: 0;
  overflow-wrap: anywhere;
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  font-size: 0.82rem;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

@media (max-width: 640px) {
  .lab-table {
    font-size: 0.86rem;
    min-width: 38rem;
  }
  .lab-provenance {
    grid-template-columns: 1fr;
  }
  .lab-provenance dd {
    margin-bottom: 0.4rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  * {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
    scroll-behavior: auto !important;
  }
}