.regression-tabs,
.regression-tab-panel {
  margin-top: 18px;
}

.regression-tab-panel[hidden] { display: none; }

.regression-data-layout {
  display: grid;
  grid-template-columns: minmax(320px, 500px) minmax(0, 1fr);
  gap: 18px;
  align-items: start;
  margin-top: 18px;
}

.regression-data-layout .plot-card {
  position: sticky;
  top: 84px;
}

.regression-plot-controls {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
  margin-bottom: 12px;
}

.regression-canvas {
  display: block;
  width: 100%;
  min-height: 430px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--surface);
}

.regression-equation-card {
  display: grid;
  gap: 14px;
}

.regression-equation {
  display: grid;
  align-items: center;
  min-height: 62px;
  padding: 12px;
  border: 1px solid var(--line);
  border-radius: 8px;
  overflow-x: auto;
  background: var(--surface-strong);
}

.regression-equation { font-size: 1.18rem; }

.regression-error {
  min-height: 22px;
  color: var(--coral);
  font-weight: 800;
}

.regression-output-buttons {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 18px;
}

.regression-block-grid {
  display: grid;
  gap: 18px;
  margin-top: 18px;
}

.regression-block { min-width: 0; }

.regression-block.is-wide { grid-column: 1 / -1; }

.regression-workbook-wrap {
  max-height: 520px;
  overflow: auto;
}

.regression-workbook-wrap table { min-width: max-content; }

.regression-workbook-wrap td {
  white-space: nowrap;
  text-align: right;
}

.regression-workbook-wrap td:first-child { text-align: left; }

@media (max-width: 900px) {
  .regression-data-layout {
    grid-template-columns: 1fr;
  }

  .regression-data-layout .plot-card {
    position: static;
  }
}

@media (max-width: 620px) {
  .regression-plot-controls {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}