/* compare.css — Compare page layout and components */

/* ── Shared toolbar styles (mirrored from detail.css) ───────────────────── */

.unit-toolbar {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.75rem 1.5rem;
  padding: 0.5rem 1rem;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  margin-bottom: 1.5rem;
}

.unit-toolbar-group {
  display: flex;
  align-items: center;
  gap: 0.4rem;
}

.unit-toolbar-label {
  font-size: 0.8rem;
  color: var(--color-muted);
  font-weight: 500;
  white-space: nowrap;
}

.unit-preset-btn {
  font-size: 0.8rem;
  padding: 0.2rem 0.65rem;
  border: 1px solid var(--color-border);
  border-radius: 4px;
  background: white;
  cursor: pointer;
  color: var(--color-text);
  transition: background 0.1s, color 0.1s;
}

.unit-preset-btn:hover { background: var(--color-primary-light); }

.unit-preset-btn.is-active {
  background: var(--color-primary);
  color: white;
  border-color: var(--color-primary);
}

/* ── Page layout ─────────────────────────────────────────────────────────── */

.compare-layout {
  max-width: 1300px;
  margin: 0 auto;
  padding: 1.5rem 1.5rem 3rem;
}

/* ── Compare header ──────────────────────────────────────────────────────── */

.compare-header {
  margin-bottom: 1.5rem;
}

.compare-back {
  display: inline-block;
  font-size: 0.85rem;
  color: var(--color-muted);
  text-decoration: none;
  margin-bottom: 0.5rem;
}
.compare-back:hover { color: var(--color-text); }

.compare-title {
  font-size: 1.4rem;
  font-weight: 700;
  margin-bottom: 1rem;
}

/* ── Material strip ──────────────────────────────────────────────────────── */

.mat-strip {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-bottom: 0.5rem;
}

.mat-chip {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 0.6rem 0.9rem;
  min-width: 160px;
  max-width: 240px;
  display: flex;
  flex-direction: column;
  gap: 0.3rem;
  box-shadow: var(--shadow-sm);
}

.mat-chip-name {
  font-weight: 600;
  font-size: 0.85rem;
  line-height: 1.3;
  color: var(--color-text);
}

.mat-chip-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.25rem;
}

.mat-chip-link {
  font-size: 0.75rem;
  color: var(--color-primary);
  text-decoration: none;
  margin-top: 0.1rem;
}
.mat-chip-link:hover { text-decoration: underline; }

/* ── Compare body sections ───────────────────────────────────────────────── */

.compare-body { display: flex; flex-direction: column; gap: 2rem; }

.compare-section {}

.compare-section-title {
  font-size: 0.8rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--color-muted);
  margin-bottom: 0.75rem;
  display: flex;
  align-items: center;
  gap: 0.75rem;
  flex-wrap: wrap;
}

/* ── Chart grid ──────────────────────────────────────────────────────────── */

.chart-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
  gap: 1rem;
}

.chart-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 1rem;
  box-shadow: var(--shadow-sm);
  height: 280px;
  position: relative;
}

.chart-wide {
  height: 320px;
  width: 100%;
}

/* Empty chart state */
.chart-no-data {
  display: flex;
  align-items: center;
  justify-content: center;
}

.chart-empty-msg {
  text-align: center;
  color: var(--color-muted);
}
.chart-empty-msg span {
  display: block;
  font-weight: 600;
  font-size: 0.85rem;
  margin-bottom: 0.25rem;
}
.chart-empty-msg p { font-size: 0.78rem; }

/* ── CTE scalar fallback table ───────────────────────────────────────────── */

.cte-scalar-wrap {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  overflow: hidden;
}

.cte-scalar-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.875rem;
}

.cte-scalar-table th {
  background: var(--color-bg);
  padding: 0.5rem 1rem;
  text-align: left;
  font-weight: 600;
  font-size: 0.78rem;
  color: var(--color-muted);
  border-bottom: 2px solid var(--color-border);
}

.cte-scalar-table td {
  padding: 0.55rem 1rem;
  border-bottom: 1px solid var(--color-border);
}

.cte-scalar-table tbody tr:last-child td { border-bottom: none; }

.cte-scalar-table tbody tr:hover { background: var(--color-bg); }

.cte-scalar-val {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
}

.cte-dot {
  display: inline-block;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  margin-right: 0.5rem;
  vertical-align: middle;
  flex-shrink: 0;
}

/* ── Properties summary table ────────────────────────────────────────────── */

.props-table-wrap {
  overflow-x: auto;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
}

.props-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.84rem;
}

.props-table thead tr {
  background: var(--color-bg);
  border-bottom: 2px solid var(--color-border);
}

.props-prop-header {
  padding: 0.5rem 0.75rem;
  text-align: left;
  font-weight: 600;
  font-size: 0.78rem;
  color: var(--color-muted);
  white-space: nowrap;
  min-width: 160px;
}

.props-unit-header {
  padding: 0.5rem 0.75rem;
  text-align: left;
  font-weight: 600;
  font-size: 0.78rem;
  color: var(--color-muted);
  white-space: nowrap;
  min-width: 90px;
}

.props-mat-header {
  padding: 0.5rem 0.75rem;
  text-align: center;
  font-weight: 600;
  font-size: 0.82rem;
  color: var(--color-text);
  min-width: 130px;
  white-space: nowrap;
}

.props-section-row td {
  padding: 0.3rem 0.75rem;
  background: var(--color-bg);
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.07em;
  color: var(--color-muted);
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
}

.props-table tbody tr {
  border-bottom: 1px solid var(--color-border);
  transition: background 0.1s;
}
.props-table tbody tr:last-child { border-bottom: none; }
.props-table tbody tr:not(.props-section-row):hover { background: var(--color-bg); }

.props-label {
  padding: 0.4rem 0.75rem;
  white-space: nowrap;
  font-weight: 500;
  color: var(--color-text);
  font-size: 0.82rem;
}

.props-unit {
  padding: 0.4rem 0.75rem;
  font-size: 0.78rem;
  color: var(--color-muted);
  white-space: nowrap;
  font-family: var(--font-mono);
}

/* Badge variants for identification tags */
.badge-form {
  background: #dbeafe;
  color: #1e40af;
}
.badge-process {
  background: #ede9fe;
  color: #5b21b6;
}

.props-val {
  padding: 0.4rem 0.75rem;
  text-align: center;
  vertical-align: middle;
}

.props-num {
  font-family: var(--font-mono);
  font-size: 0.81rem;
  font-variant-numeric: tabular-nums;
}

.props-missing {
  color: var(--color-text-faint);
  font-style: italic;
}

/* ── Merit index table ───────────────────────────────────────────────────── */

.merit-legend {
  font-size: 0.75rem;
  color: var(--color-muted);
  font-weight: 400;
  text-transform: none;
  letter-spacing: 0;
  display: flex;
  align-items: center;
  gap: 0.25rem;
  flex-wrap: wrap;
}

.merit-up   { color: var(--color-success); font-weight: 700; }
.merit-down { color: var(--color-danger);  font-weight: 700; }

.merit-best-swatch {
  display: inline-block;
  width: 12px;
  height: 12px;
  background: #fef9c3;
  border: 1px solid #fde047;
  border-radius: 2px;
}

.merit-table-wrap {
  overflow-x: auto;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
}

.merit-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.82rem;
}

.merit-table thead tr {
  background: var(--color-bg);
  border-bottom: 2px solid var(--color-border);
}

.merit-table th {
  padding: 0.5rem 0.75rem;
  font-weight: 600;
  font-size: 0.78rem;
  color: var(--color-muted);
  text-align: left;
  white-space: nowrap;
  vertical-align: bottom;
}

.merit-table th .merit-mat-dot {
  display: inline-block;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  margin-right: 0.3rem;
  vertical-align: middle;
}

.merit-table tbody tr {
  border-bottom: 1px solid var(--color-border);
  transition: background 0.1s;
}
.merit-table tbody tr:last-child { border-bottom: none; }
.merit-table tbody tr:hover { background: var(--color-bg); }

.merit-table td {
  padding: 0.45rem 0.75rem;
  vertical-align: middle;
}

td.merit-id {
  font-size: 0.8rem;
  white-space: nowrap;
  min-width: 10rem;
}

td.merit-label {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  white-space: nowrap;
  max-width: 180px;
}

td.merit-group {
  font-size: 0.75rem;
  color: var(--color-muted);
  white-space: nowrap;
}

/* Direction arrows inside table cells */
.merit-table td .merit-dir {
  font-size: 1rem;
  margin-left: 0.3rem;
}

td.merit-cell {
  text-align: right;
  min-width: 90px;
}

td.merit-best {
  background: #fef9c3;
}

.merit-val {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  font-variant-numeric: tabular-nums;
  display: block;
  text-align: right;
}

.merit-missing {
  color: var(--color-text-faint);
  font-style: italic;
  display: block;
  text-align: center;
}

.merit-bar-wrap {
  height: 4px;
  background: var(--color-border);
  border-radius: 2px;
  margin-top: 3px;
  overflow: hidden;
}

.merit-bar {
  height: 100%;
  border-radius: 2px;
  transition: width 0.3s ease;
}

.merit-ref-sup {
  font-size: 0.7rem;
  color: var(--color-muted);
  text-decoration: none;
  margin-left: 0.15rem;
}
.merit-ref-sup:hover { color: var(--color-text); }

.merit-footnotes {
  margin-top: 0.75rem;
  padding-left: 1.5rem;
  font-size: 0.8rem;
  color: var(--color-muted);
  line-height: 1.6;
}
.merit-footnotes a { color: var(--color-muted); }
.merit-footnotes a:hover { color: var(--color-text); }

/* ── Error / empty / loading states ─────────────────────────────────────── */

@keyframes shimmer {
  0%   { background-position: -600px 0; }
  100% { background-position: 600px 0; }
}

.compare-loading {
  display: flex;
  gap: 1rem;
  padding: 2rem;
  flex-wrap: wrap;
}

.skeleton-chip {
  width: 180px;
  height: 90px;
  border-radius: var(--radius);
  background: linear-gradient(90deg, #e2e8f0 25%, #f1f5f9 50%, #e2e8f0 75%);
  background-size: 800px 100%;
  animation: shimmer 1.4s infinite linear;
}

.compare-empty,
.compare-error {
  max-width: 520px;
  margin: 4rem auto;
  padding: 2rem;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  text-align: center;
  font-size: 0.9rem;
  line-height: 1.6;
  color: var(--color-text);
}

.compare-empty strong,
.compare-error strong {
  display: block;
  font-size: 1rem;
  margin-bottom: 0.5rem;
}

.compare-error {
  background: #fff5f5;
  border-color: #fed7d7;
  color: #c53030;
}