/* ── Explain panels ── */
.explain-panel {
  flex-shrink: 0;
  background: var(--bg2);
  border: 1px solid var(--border);
  border-radius: 8px;
  box-shadow: var(--card-shadow);
  padding: 10px 16px 12px;
  display: flex;
  gap: 24px;
  align-items: flex-start;
}
.explain-text { flex: 1; min-width: 0; }
.explain-text h2 {
  font-family: 'Roboto Flex', sans-serif;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--text2);
  margin-bottom: 5px;
}
.explain-text p {
  font-family: 'Roboto Flex', sans-serif;
  font-size: 15.5px;
  font-weight: 350;
  color: var(--text2);
  line-height: 1.6;
  margin-bottom: 4px;
}
.explain-text p:last-child { margin-bottom: 0; }

/* ── Controls ── */
.control-row {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
  margin-top: 8px;
}
.control-label {
  font-size: 11px; font-weight: 600; color: var(--text2);
  letter-spacing: 0.04em; text-transform: uppercase;
  white-space: nowrap;
}
.mod-select {
  font-family: 'Roboto Flex', sans-serif;
  font-size: 12px; font-weight: 500;
  color: var(--text); background: var(--select-bg);
  border: 1px solid var(--border); border-radius: 6px;
  padding: 5px 8px; cursor: pointer; outline: none;
  transition: border-color 0.15s;
  min-width: 150px;
}
.mod-select.wide { min-width: 220px; }
.mod-select:focus { border-color: var(--accent); }

.formula-tag {
  font-size: 12px; font-weight: 600; padding: 4px 12px;
  border-radius: 999px; background: var(--tag-bg); color: var(--tag-text);
  white-space: nowrap; font-variant-numeric: tabular-nums;
}

.slider-label {
  font-size: 11px; font-weight: 600; color: var(--text2);
  letter-spacing: 0.04em; text-transform: uppercase;
  white-space: nowrap; flex-shrink: 0;
}
.slider-wrap { display: flex; align-items: center; gap: 10px; flex: 1; min-width: 160px; max-width: 320px; }
input[type=range] {
  flex: 1; -webkit-appearance: none; appearance: none; height: 4px;
  background: var(--slider-track); border-radius: 2px; outline: none; cursor: pointer;
}
input[type=range]::-webkit-slider-thumb {
  -webkit-appearance: none; width: 17px; height: 17px; border-radius: 50%;
  background: var(--slider-thumb); box-shadow: 0 1px 4px rgba(0,0,0,0.22);
  transition: transform 0.12s;
}
input[type=range]::-webkit-slider-thumb:hover { transform: scale(1.18); }
input[type=range]::-moz-range-thumb {
  width: 17px; height: 17px; border-radius: 50%; border: none;
  background: var(--slider-thumb); box-shadow: 0 1px 4px rgba(0,0,0,0.22);
}
.slider-val { font-size: 13px; font-weight: 700; color: var(--accent); min-width: 42px; }

.ortho-tag {
  font-size: 11px; font-weight: 600; padding: 3px 10px;
  border-radius: 999px; background: var(--tag-bg); color: var(--tag-text); white-space: nowrap;
}

/* ── Plot cards ── */
.plots-rows {
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.plot-row-label {
  font-size: 11.5px; font-weight: 700;
  letter-spacing: 0.05em; text-transform: uppercase;
  color: var(--text3);
  margin: 2px 0 -2px 2px;
}
.plots-pair {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
}
@media(max-width: 860px) { .plots-pair { grid-template-columns: 1fr; } }

.plot-card {
  background: var(--bg2);
  border: 1px solid var(--border);
  border-radius: 8px;
  box-shadow: var(--card-shadow);
  padding: 10px 12px 12px;
  display: flex;
  flex-direction: column;
  gap: 6px;
  min-width: 0;
}
.plot-title {
  font-size: 12px; font-weight: 700;
  letter-spacing: 0.06em; text-transform: uppercase;
  color: var(--text2);
}
.plot-legend {
  display: flex; gap: 14px; flex-wrap: wrap;
  min-height: 16px;
}
.legend-item { display: flex; align-items: center; gap: 5px; }
.legend-swatch { width: 14px; height: 0; border-top-width: 2px; border-top-style: solid; }
.legend-swatch.dashed { border-top-style: dashed; }
.legend-label { font-size: 11.5px; font-weight: 500; color: var(--text2); }
.legend-diamond { font-size: 9px; line-height: 1; }

.canvas-wrap {
  position: relative;
  background: var(--bg2); border: 1px solid var(--border);
  border-radius: 6px;
  overflow: hidden;
}
.canvas-wrap.tall { height: 150px; }
.canvas-wrap canvas { display: block; width: 100%; height: 100%; }

/* Hover tooltip */
.plot-tooltip {
  position: absolute;
  pointer-events: none;
  background: var(--bg2);
  border: 1px solid var(--border);
  border-radius: 6px;
  box-shadow: var(--card-shadow);
  padding: 5px 9px;
  font-size: 11px;
  font-weight: 500;
  color: var(--text);
  font-variant-numeric: tabular-nums;
  white-space: nowrap;
  display: none;
  z-index: 5;
}
.plot-tooltip .tip-t { color: var(--text3); font-weight: 600; margin-bottom: 2px; }
.plot-tooltip .tip-row { display: flex; align-items: center; gap: 5px; }
.plot-tooltip .tip-chip { width: 8px; height: 8px; border-radius: 2px; flex-shrink: 0; }