:root {
  color-scheme: light;
  --bg: #f6f9fc;
  --surface: #ffffff;
  --surface-soft: #f0f5f8;
  --surface-strong: #e8f0f5;
  --text: #203243;
  --muted: #687d8f;
  --border: #d5e0e8;
  --accent: #789db5;
  --accent-strong: #55798f;
  --accent-soft: #eaf2f7;
  --warning-soft: #fff3d6;
  --warning-text: #7a5310;
  --shadow: 0 20px 55px rgba(67, 96, 116, 0.12);
  --radius: 18px;
  --radius-sm: 10px;
  --font-body: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --font-heading: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", monospace;
}

html[data-theme="dark"] {
  color-scheme: dark;
  --bg: #101820;
  --surface: #17232d;
  --surface-soft: #1d2c37;
  --surface-strong: #263846;
  --text: #edf3f7;
  --muted: #aebfcb;
  --border: #344b5b;
  --accent: #8eb0c5;
  --accent-strong: #bad0de;
  --accent-soft: #243b4a;
  --warning-soft: #443718;
  --warning-text: #f0cf83;
  --shadow: 0 24px 65px rgba(0, 0, 0, 0.34);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  min-width: 320px;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-body);
  line-height: 1.5;
}
button, input, select { font: inherit; }
button { color: inherit; }

.skip-link {
  position: fixed;
  top: 10px;
  left: 10px;
  z-index: 100;
  transform: translateY(-150%);
  padding: 9px 12px;
  border-radius: 8px;
  background: var(--surface);
  color: var(--text);
  box-shadow: var(--shadow);
}
.skip-link:focus { transform: translateY(0); }

.site-header {
  border-bottom: 1px solid var(--border);
  background: var(--surface);
}
.header-inner {
  width: min(1500px, calc(100% - 40px));
  margin: 0 auto;
  padding: 36px 0 32px;
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 32px;
}
h1, h2, h3, h4, th, .eyebrow { font-family: var(--font-heading); }
h1, h2, h3 { margin: 0; line-height: 1.15; }
h1 { max-width: 850px; font-size: clamp(2rem, 4vw, 3.65rem); letter-spacing: -0.045em; }
h2 { font-size: clamp(1.25rem, 2vw, 1.75rem); letter-spacing: -0.025em; }
h3 { font-size: 1.05rem; }
.lede { max-width: 800px; margin: 14px 0 0; color: var(--muted); font-size: 1.05rem; }
.eyebrow { margin: 0 0 8px; color: var(--accent); font-size: .76rem; font-weight: 800; letter-spacing: .12em; text-transform: uppercase; }
.header-actions, .result-actions { display: flex; align-items: center; gap: 10px; }

.page-shell { width: min(1500px, calc(100% - 40px)); margin: 24px auto 56px; }
.panel { border: 1px solid var(--border); background: var(--surface); box-shadow: 0 8px 24px rgba(67,96,116,.06); }
.panel { border-radius: var(--radius); }
.controls-panel { padding: 22px; margin-bottom: 18px; }
.panel-heading, .table-toolbar { display: flex; align-items: flex-start; justify-content: space-between; gap: 24px; }
.filters-grid { display: grid; grid-template-columns: minmax(260px, 2fr) repeat(3, minmax(150px, 1fr)); gap: 14px; margin-top: 20px; align-items: end; }
.field { display: grid; gap: 7px; }
.field > span, .check-field span { font-size: .82rem; font-weight: 700; color: var(--muted); }
.field-wide { grid-column: span 2; }
input[type="search"], select {
  width: 100%;
  min-height: 44px;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: var(--surface-soft);
  color: var(--text);
  padding: 10px 12px;
  outline: none;
}
input[type="search"]:focus, select:focus { border-color: var(--accent); box-shadow: 0 0 0 3px color-mix(in srgb, var(--accent) 18%, transparent); }
.check-field { min-height: 44px; display: flex; align-items: center; gap: 9px; padding: 9px 11px; border: 1px solid var(--border); border-radius: var(--radius-sm); background: var(--surface-soft); }
.check-field input { width: 17px; height: 17px; accent-color: var(--accent); }

.button, .icon-button {
  border: 0;
  border-radius: var(--radius-sm);
  background: var(--accent);
  color: white;
  cursor: pointer;
  font-weight: 800;
  transition: transform .15s ease, background .15s ease, opacity .15s ease;
}
.button { min-height: 42px; padding: 9px 14px; }
.button-ghost { background: var(--surface-soft); color: var(--text); border: 1px solid var(--border); }
.icon-button { width: 42px; height: 42px; display: grid; place-items: center; font-size: 1.35rem; }
.button:hover, .icon-button:hover { transform: translateY(-1px); }
.button:focus-visible, .icon-button:focus-visible { outline: 3px solid color-mix(in srgb, var(--accent) 28%, transparent); outline-offset: 2px; }

.table-panel { overflow: hidden; }
.table-toolbar { padding: 20px 22px 16px; border-bottom: 1px solid var(--border); }
.table-toolbar h2 { margin-bottom: 5px; }
.table-hint, .muted { color: var(--muted); margin: 0; font-size: .9rem; }
.table-toolbar-options { display: grid; justify-items: start; gap: 10px; max-width: 430px; }
.table-expanded-toggle { width: fit-content; }
.table-display-controls {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 10px;
}
.table-scroll { overflow: auto; max-height: min(72vh, 900px); }
table { width: 100%; border-collapse: separate; border-spacing: 0; min-width: 1120px; }
th, td { padding: 13px 14px; border-bottom: 1px solid var(--border); vertical-align: top; text-align: left; }
th { position: sticky; top: 0; z-index: 2; background: var(--surface-strong); color: var(--muted); font-size: .76rem; letter-spacing: .06em; text-transform: uppercase; }
th:first-child, td:first-child { padding-left: 22px; }
th:last-child, td:last-child { padding-right: 22px; }
th.sortable { cursor: pointer; user-select: none; }
th.sortable:hover { color: var(--text); }
th.sortable.is-sorted { color: var(--text); }
.sort-indicator {
  display: inline-block;
  width: 1em;
  margin-left: 4px;
  color: var(--muted);
  font-size: .95em;
  text-align: center;
}
th.sortable.is-sorted .sort-indicator { color: var(--accent-strong); }
tbody tr { cursor: pointer; background: var(--surface); transition: background .12s ease; }
tbody tr:hover, tbody tr:focus-within { background: var(--surface-soft); }
tbody tr:last-child td { border-bottom: 0; }
.index-cell { color: var(--muted); font-variant-numeric: tabular-nums; }
.mpg-symbol { font-size: 1.1rem; font-weight: 850; white-space: nowrap; }
.system-text { color: var(--muted); white-space: nowrap; }
.hall-vector { display: inline; font-size: 1.04rem; white-space: nowrap; }
.zero-text { color: var(--muted); font-style: italic; }
.term-list, .detail-terms, .component-reference {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 7px;
}
.term-list { min-width: 240px; }
.term-text, .term-link {
  display: inline-flex;
  align-items: center;
  min-height: 30px;
  padding: 4px 10px;
  border: 1px solid color-mix(in srgb, var(--accent) 28%, var(--border));
  border-radius: 999px;
  background: var(--accent-soft);
  color: var(--accent-strong);
  font-weight: 700;
  line-height: 1.2;
  white-space: nowrap;
  text-decoration: none;
}
.term-link {
  cursor: pointer;
  transition: transform .14s ease, border-color .14s ease, background .14s ease, color .14s ease;
}
.term-link:hover {
  border-color: var(--accent);
  background: color-mix(in srgb, var(--accent-soft) 70%, var(--surface));
  color: var(--accent);
  transform: translateY(-1px);
}
.term-link:focus-visible {
  outline: 3px solid color-mix(in srgb, var(--accent) 28%, transparent);
  outline-offset: 2px;
}
.term-text.term-overlap {
  border-style: dashed;
  background: color-mix(in srgb, var(--accent-soft) 45%, var(--surface));
  color: var(--muted);
}
.more-text, .overlap-note { color: var(--muted); font-size: .88rem; padding: 2px 3px; }
.overlap-note { font-style: italic; }
.empty-state { padding: 56px 24px; text-align: center; }
.empty-state p { color: var(--muted); }

code { font-family: var(--mono); font-size: .9em; background: var(--surface-soft); padding: 2px 5px; border-radius: 5px; }

.drawer { position: fixed; inset: 0; z-index: 50; pointer-events: none; visibility: hidden; }
.drawer[aria-hidden="false"] { pointer-events: auto; visibility: visible; }
.drawer-backdrop { position: absolute; inset: 0; background: rgba(7, 25, 43, .56); opacity: 0; transition: opacity .2s ease; }
.drawer-panel { position: absolute; top: 0; right: 0; width: min(640px, 94vw); height: 100%; background: var(--surface); box-shadow: var(--shadow); transform: translateX(102%); transition: transform .24s ease; overflow: auto; }
.drawer-panel-wide { width: min(820px, 96vw); }
.drawer[aria-hidden="false"] .drawer-backdrop { opacity: 1; }
.drawer[aria-hidden="false"] .drawer-panel { transform: translateX(0); }
.drawer-header { position: sticky; top: 0; z-index: 2; display: flex; align-items: flex-start; justify-content: space-between; gap: 18px; padding: 22px; border-bottom: 1px solid var(--border); background: color-mix(in srgb, var(--surface) 92%, transparent); backdrop-filter: blur(10px); }
.drawer-content { padding: 22px; }
.detail-summary { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 10px; margin-bottom: 22px; }
.detail-card { border: 1px solid var(--border); border-radius: var(--radius-sm); padding: 13px; background: var(--surface-soft); }
.detail-card span { display: block; color: var(--muted); font-size: .75rem; font-weight: 750; text-transform: uppercase; letter-spacing: .06em; }
.detail-card strong { display: block; margin-top: 4px; font-size: 1.1rem; }
.detail-section { padding: 18px 0; border-top: 1px solid var(--border); }
.detail-section:first-of-type { border-top: 0; padding-top: 0; }
.detail-section h3 { margin-bottom: 10px; }
.detail-section p { margin: 8px 0 0; color: var(--muted); }

.detail-terms .term-text, .detail-terms .term-link { font-size: .98rem; }
.notice { margin: 12px 0; border-left: 4px solid var(--warning-text); background: var(--warning-soft); color: var(--warning-text); border-radius: 0 var(--radius-sm) var(--radius-sm) 0; padding: 11px 13px; }
.prose h3 { margin-top: 26px; }
.prose h3:first-child { margin-top: 0; }
.prose h4 { margin: 20px 0 8px; font-size: .98rem; color: var(--text); }
.prose p { color: var(--muted); }
.math-inline { color: var(--text); }
.latex-math { display: inline-flex; align-items: baseline; }
mjx-container[jax="CHTML"] { margin: 0 !important; color: inherit; }
.term-link mjx-container, .hall-vector mjx-container, .mpg-symbol mjx-container { pointer-events: none; }
.component-reference { margin: 10px 0 16px; }
.guide-equation { margin: 6px 0; padding-left: 18px; }

@media (max-width: 1000px) {
  .filters-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .field-wide { grid-column: span 2; }
}
@media (max-width: 700px) {
  .header-inner, .panel-heading, .table-toolbar { flex-direction: column; }
  .header-actions, .result-actions { width: 100%; }
  .header-actions .button, .result-actions .button { flex: 1; }
  .page-shell, .header-inner { width: min(100% - 24px, 1500px); }
  .filters-grid { grid-template-columns: 1fr; }
  .field-wide { grid-column: span 1; }
  .detail-summary { grid-template-columns: 1fr 1fr; }
  .controls-panel, .drawer-content { padding: 17px; }
}
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { scroll-behavior: auto !important; transition-duration: .01ms !important; }
}

/* Change-of-basis tool */
input[type="number"] {
  width: 100%;
  min-height: 44px;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: var(--surface-soft);
  color: var(--text);
  padding: 10px 12px;
  outline: none;
}
input[type="number"]:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--accent) 18%, transparent);
}
.detail-basis-action { margin: -4px 0 18px; }
.basis-panel { width: min(1500px, 98vw); }
.basis-intro { margin: 0 0 20px; color: var(--muted); }
.basis-controls {
  display: grid;
  gap: 14px;
  align-items: end;
}
.basis-top-controls {
  grid-template-columns: minmax(230px, 1.5fr) minmax(190px, .8fr);
}
.basis-axis-controls {
  grid-template-columns: minmax(300px, 2fr) minmax(150px, .8fr);
  margin-top: 14px;
}
.basis-axis-controls[hidden] { display: none; }
.basis-axis-fieldset {
  min-width: 0;
  margin: 0;
  padding: 0;
  border: 0;
  display: grid;
  grid-template-columns: repeat(3, minmax(84px, 1fr));
  gap: 10px;
}
.basis-axis-fieldset legend {
  grid-column: 1 / -1;
  margin-bottom: 7px;
  padding: 0;
  color: var(--muted);
  font-size: .82rem;
  font-weight: 700;
}
.basis-matrix-fieldset {
  margin: 14px 0 0;
  padding: 14px;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: var(--surface-soft);
}
.basis-matrix-fieldset[hidden] { display: none; }
.basis-matrix-fieldset legend {
  padding: 0 6px;
  color: var(--muted);
  font-size: .82rem;
  font-weight: 800;
}
.basis-matrix-fieldset .muted { margin: 4px 0 12px; }
.basis-matrix-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(76px, 1fr));
  gap: 10px;
}
.basis-matrix-grid .field > span {
  font-size: .76rem;
}
.basis-presets,
.basis-actions {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 9px;
}
.basis-presets { margin-top: 14px; }

/* Compare Bases uses the per-view Basis select menus plus the shared editor.
   Keep the standalone preset button strip and identity reset out of this workspace. */
.basis-tool-page .basis-presets,
.basis-tool-page #resetBasisButton {
  display: none !important;
}
.basis-presets > span {
  margin-right: 2px;
  color: var(--muted);
  font-size: .82rem;
  font-weight: 750;
}
.basis-preset { min-height: 36px; padding: 6px 10px; }
.basis-actions { margin-top: 16px; }
.form-error {
  margin: 14px 0 0;
  padding: 10px 12px;
  border-radius: var(--radius-sm);
  background: var(--warning-soft);
  color: var(--warning-text);
  font-weight: 700;
}
.basis-output { margin-top: 24px; }
.basis-result-header {
  padding: 16px;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: var(--surface-soft);
}
.basis-result-header h3 { display: flex; align-items: baseline; flex-wrap: wrap; gap: 5px; }
.basis-result-header p { margin: 7px 0 0; }
.basis-result-section {
  padding: 20px 0;
  border-top: 1px solid var(--border);
}
.basis-result-section:first-of-type { margin-top: 8px; }
.basis-result-section h3 { margin-bottom: 12px; }
.basis-matrix {
  overflow-x: auto;
  padding: 12px 14px;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: var(--surface-soft);
  font-size: 1.05rem;
}
.basis-comparison-line { margin: 8px 0; }
.basis-transform-list { display: grid; gap: 9px; }
.basis-transform-item {
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: var(--surface-soft);
  overflow: hidden;
}
.basis-transform-item summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  min-height: 48px;
  padding: 10px 13px;
  cursor: pointer;
  list-style-position: inside;
  font-weight: 750;
}
.basis-transform-item summary:hover { background: var(--surface-strong); }
.basis-source-term { color: var(--accent-strong); white-space: nowrap; }
.basis-summary-text { color: var(--muted); font-size: .84rem; font-weight: 650; }
.basis-expression {
  overflow-x: auto;
  padding: 14px;
  border-top: 1px solid var(--border);
  background: var(--surface);
  line-height: 1.9;
}
.basis-caveat { margin-top: 20px; }

@media (max-width: 820px) {
  .basis-controls, .basis-top-controls, .basis-axis-controls { grid-template-columns: 1fr; }
  .basis-axis-fieldset, .basis-matrix-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); }
}

@media (max-width: 520px) {
  .basis-axis-fieldset, .basis-matrix-grid { grid-template-columns: 1fr; }
  .basis-transform-item summary { align-items: flex-start; flex-direction: column; gap: 4px; }
}

/* Clear feedback for change-of-basis application */
.basis-pending {
  margin-top: 0;
  border-style: dashed;
}
.basis-applied-label {
  margin: 0 0 5px;
  color: var(--accent-strong);
  font-size: .78rem;
  font-weight: 800;
  letter-spacing: .06em;
  text-transform: uppercase;
}
#applyBasisButton.is-applied {
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--accent) 18%, transparent);
}
.basis-output-flash {
  animation: basisOutputFlash .65s ease-out;
}
@keyframes basisOutputFlash {
  0% { opacity: .35; transform: translateY(5px); }
  100% { opacity: 1; transform: translateY(0); }
}
@media (prefers-reduced-motion: reduce) {
  .basis-output-flash { animation: none; }
}

/* Main-table basis state */
.button:disabled,
.icon-button:disabled {
  cursor: not-allowed;
  opacity: .48;
  transform: none;
}

.main-basis-banner {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 24px;
  padding: 18px 22px;
  border-bottom: 1px solid var(--border);
  background: var(--accent-soft);
}
.main-basis-banner[hidden] { display: none; }
.main-basis-banner h3 { margin-bottom: 7px; }
.main-basis-banner .eyebrow { margin-bottom: 5px; }
.main-basis-banner .muted { max-width: 900px; margin-top: 8px; }
.main-basis-summary { display: grid; gap: 8px; }
.main-basis-line { margin: 0; color: var(--muted); }
.main-basis-matrix {
  width: fit-content;
  max-width: 100%;
  overflow-x: auto;
  padding: 8px 10px;
  border: 1px solid color-mix(in srgb, var(--accent) 24%, var(--border));
  border-radius: var(--radius-sm);
  background: color-mix(in srgb, var(--surface) 74%, transparent);
}
.main-basis-detail-notice { overflow-x: auto; }

.basis-matrix-preview + .basis-pending { margin-top: 0; }
#applyBasisToTableButton.is-applied {
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--accent) 18%, transparent);
}

@media (max-width: 700px) {
  .main-basis-banner { flex-direction: column; }
  .main-basis-banner .button { width: 100%; }
}

/* Main results and change-of-basis comparison */
.results-workspace {
  display: grid;
  gap: 18px;
}

.main-results-table-panel {
  min-width: 0;
  overflow: hidden;
}
.basis-comparison-section {
  margin-top: 30px;
  padding-top: 24px;
  border-top: 1px solid var(--border);
}
.basis-comparison-heading {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 20px;
  margin-bottom: 16px;
}
.basis-comparison-heading h3 { margin-bottom: 5px; }

.comparison-heading-actions {
  display: grid;
  justify-items: end;
  gap: 12px;
  flex: 0 0 auto;
}
#applyComparisonBasisButton.is-applied {
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--accent) 18%, transparent);
}
.basis-comparison-heading .muted { max-width: 760px; }
.results-toolbar-panel {
  overflow: hidden;
}
.results-toolbar-panel .table-toolbar {
  border-bottom: 0;
}
.compact-field {
  gap: 5px;
}
.compact-field > span {
  font-size: .74rem;
}
.layout-field {
  min-width: 205px;
}
.layout-field select {
  min-height: 42px;
  background: var(--surface-soft);
}
.basis-tile-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 18px;
  align-items: start;
}
.basis-tile-grid[data-tiles="2"],
.basis-tile-grid[data-tiles="3"],
.basis-tile-grid[data-tiles="4"] {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}
.basis-tile-grid[data-tiles="3"] .basis-tile:last-child {
  grid-column: 1 / -1;
}
.basis-tile {
  min-width: 0;
  overflow: hidden;
  border-color: var(--border);
  transition: border-color .15s ease, box-shadow .15s ease;
}
.basis-tile.is-active {
  border-color: color-mix(in srgb, var(--accent) 68%, var(--border));
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--accent) 12%, transparent), 0 12px 28px rgba(67,96,116,.08);
}
.basis-tile-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 16px;
  padding: 16px 17px 14px;
  border-bottom: 1px solid var(--border);
  background: var(--surface);
}
.basis-tile-header h3 {
  font-size: 1.12rem;
}
.basis-tile-subtitle {
  margin-top: 5px;
  max-width: 520px;
}
.basis-tile-controls {
  display: flex;
  align-items: end;
  justify-content: flex-end;
  flex-wrap: wrap;
  gap: 8px;
}
.tile-preset-field {
  min-width: 185px;
}
.tile-preset-field select {
  min-height: 39px;
  padding: 8px 10px;
}
.tile-activate-button,
.basis-tile-controls > .button {
  min-height: 39px;
  padding: 8px 11px;
  font-size: .86rem;
}
.tile-activate-button.is-applied {
  border-color: color-mix(in srgb, var(--accent) 50%, var(--border));
  background: var(--accent-soft);
  color: var(--accent-strong);
}
.tile-basis-matrix {
  padding: 9px 17px;
  border-bottom: 1px solid var(--border);
  background: var(--surface-soft);
}
.tile-basis-matrix summary {
  cursor: pointer;
  color: var(--muted);
  font-size: .82rem;
  font-weight: 800;
}
.tile-basis-matrix-value {
  margin-top: 8px;
  overflow-x: auto;
  color: var(--text);
}
.tile-table-scroll {
  max-height: min(68vh, 760px);
  overscroll-behavior: contain;
}
.basis-results-table {
  min-width: 980px;
}
.basis-tile-grid[data-tiles="2"] .basis-results-table,
.basis-tile-grid[data-tiles="3"] .basis-results-table,
.basis-tile-grid[data-tiles="4"] .basis-results-table {
  min-width: 900px;
  font-size: .92rem;
}
.basis-tile-grid[data-tiles="2"] th,
.basis-tile-grid[data-tiles="2"] td,
.basis-tile-grid[data-tiles="3"] th,
.basis-tile-grid[data-tiles="3"] td,
.basis-tile-grid[data-tiles="4"] th,
.basis-tile-grid[data-tiles="4"] td {
  padding: 11px 12px;
}
.basis-tile-grid[data-tiles="2"] th:first-child,
.basis-tile-grid[data-tiles="2"] td:first-child,
.basis-tile-grid[data-tiles="3"] th:first-child,
.basis-tile-grid[data-tiles="3"] td:first-child,
.basis-tile-grid[data-tiles="4"] th:first-child,
.basis-tile-grid[data-tiles="4"] td:first-child {
  padding-left: 15px;
}
.basis-tile-grid[data-tiles="2"] th:last-child,
.basis-tile-grid[data-tiles="2"] td:last-child,
.basis-tile-grid[data-tiles="3"] th:last-child,
.basis-tile-grid[data-tiles="3"] td:last-child,
.basis-tile-grid[data-tiles="4"] th:last-child,
.basis-tile-grid[data-tiles="4"] td:last-child {
  padding-right: 15px;
}
.basis-tile-grid[data-tiles="2"] .term-list,
.basis-tile-grid[data-tiles="3"] .term-list,
.basis-tile-grid[data-tiles="4"] .term-list {
  min-width: 205px;
}

@media (max-width: 1150px) {
  .basis-tile-grid[data-tiles="2"],
  .basis-tile-grid[data-tiles="3"],
  .basis-tile-grid[data-tiles="4"] {
    grid-template-columns: minmax(0, 1fr);
  }
  .basis-tile-grid[data-tiles="3"] .basis-tile:last-child {
    grid-column: auto;
  }
}

@media (max-width: 760px) {
  .basis-comparison-heading,
  .basis-tile-header {
    flex-direction: column;
  }
  .basis-tile-controls {
    width: 100%;
    justify-content: flex-start;
  }
  .tile-preset-field {
    flex: 1 1 100%;
  }
  .layout-field {
    width: 100%;
  }
}

/* Icon controls for choosing the number of basis-comparison views. */
.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;
}
.view-layout-picker {
  display: grid;
  gap: 6px;
  justify-items: end;
}
.view-layout-label {
  color: var(--muted);
  font-size: .74rem;
  font-weight: 750;
}
.view-layout-buttons {
  display: flex;
  align-items: center;
  gap: 7px;
}
.layout-icon-button {
  display: grid;
  place-items: center;
  width: 46px;
  height: 42px;
  padding: 8px;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: var(--surface-soft);
  color: var(--muted);
  cursor: pointer;
  transition: transform .15s ease, border-color .15s ease, background .15s ease, color .15s ease;
}
.layout-icon-button:hover {
  transform: translateY(-1px);
  border-color: color-mix(in srgb, var(--accent) 42%, var(--border));
  color: var(--accent-strong);
}
.layout-icon-button:focus-visible {
  outline: 3px solid color-mix(in srgb, var(--accent) 28%, transparent);
  outline-offset: 2px;
}
.layout-icon-button.is-selected,
.layout-icon-button[aria-pressed="true"] {
  border-color: color-mix(in srgb, var(--accent) 62%, var(--border));
  background: var(--accent-soft);
  color: var(--accent-strong);
  box-shadow: 0 0 0 2px color-mix(in srgb, var(--accent) 10%, transparent);
}
.layout-icon {
  display: grid;
  width: 27px;
  height: 20px;
  gap: 3px;
}
.layout-icon i {
  display: block;
  min-width: 0;
  min-height: 0;
  border: 1.5px solid currentColor;
  border-radius: 2px;
  background: color-mix(in srgb, currentColor 9%, transparent);
}
.layout-icon-two,
.layout-icon-four {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}
.layout-icon-three {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}
.layout-icon-three i:last-child {
  grid-column: 1 / -1;
}

/* Only the basis-comparison workspace uses this dedicated full-page layout in a new tab. */
body.basis-tool-page {
  min-height: 100vh;
  overflow: auto !important;
}
body.basis-tool-page > .skip-link,
body.basis-tool-page > .site-header,
body.basis-tool-page > main {
  display: none;
}
body.basis-tool-page #basisDrawer {
  position: static;
  inset: auto;
  min-height: 100vh;
  visibility: visible !important;
  pointer-events: auto !important;
}
body.basis-tool-page #basisDrawer .drawer-backdrop {
  display: none;
}
body.basis-tool-page #basisDrawer .drawer-panel {
  position: static;
  width: 100%;
  max-width: none;
  height: auto;
  min-height: 100vh;
  overflow: visible;
  transform: none !important;
  box-shadow: none;
}
body.basis-tool-page #basisDrawer .drawer-header {
  padding-inline: max(22px, calc((100vw - 1800px) / 2));
}
body.basis-tool-page #basisDrawer .drawer-content {
  width: min(1800px, 100%);
  margin-inline: auto;
  padding: 28px clamp(18px, 3vw, 42px) 54px;
}
body.basis-tool-page #basisDrawer [data-close-basis] {
  display: none;
}

@media (max-width: 760px) {
  .basis-comparison-heading {
    align-items: stretch;
    flex-direction: column;
  }
  .comparison-heading-actions {
    width: 100%;
    justify-items: stretch;
  }
  .view-layout-picker {
    width: 100%;
    justify-items: start;
  }
  #applyComparisonBasisButton { width: 100%; }
}

/* Basis-comparison launch lives inside the regular change-of-basis sidebar. */
.basis-compare-launch {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  margin: 0 0 20px;
  padding: 14px 15px;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: var(--surface-soft);
}
.basis-compare-launch strong { display: block; margin-bottom: 3px; }
.basis-compare-launch .button { flex: 0 0 auto; }
body.basis-tool-page .basis-compare-launch { display: none; }

/* Distinct, restrained comparison palettes. These only affect the new-tab workspace. */
body.basis-tool-page {
  --comparison-active-red: #b93838;
  --comparison-active-red-soft: rgba(185, 56, 56, .14);
}
html[data-theme="dark"] body.basis-tool-page {
  --comparison-active-red: #ff8585;
  --comparison-active-red-soft: rgba(255, 133, 133, .16);
}

body.basis-tool-page .basis-tile-tone-0 {
  --surface: #fbfdfb;
  --surface-soft: #f1f6f2;
  --surface-strong: #e5eee7;
  --border: #cbd9cf;
  --accent: #758f7b;
  --accent-strong: #4f6755;
  --accent-soft: #eaf2ec;
}
body.basis-tool-page .basis-tile-tone-1 {
  --surface: #fdfcff;
  --surface-soft: #f4f0f8;
  --surface-strong: #eae3f1;
  --border: #d8cee3;
  --accent: #8b78a0;
  --accent-strong: #625272;
  --accent-soft: #f0ebf5;
}
body.basis-tool-page .basis-tile-tone-2 {
  --surface: #fffdf9;
  --surface-soft: #f8f2e8;
  --surface-strong: #efe5d4;
  --border: #dfd1ba;
  --accent: #9a7a4c;
  --accent-strong: #70552f;
  --accent-soft: #f6efe3;
}
body.basis-tool-page .basis-tile-tone-3 {
  --surface: #fffafb;
  --surface-soft: #f8eff0;
  --surface-strong: #f0e1e3;
  --border: #dfc9cc;
  --accent: #9d7278;
  --accent-strong: #744f55;
  --accent-soft: #f6eaec;
}

html[data-theme="dark"] body.basis-tool-page .basis-tile-tone-0 {
  --surface: #17231c;
  --surface-soft: #1e2d24;
  --surface-strong: #293a2f;
  --border: #3b5544;
  --accent: #93b39a;
  --accent-strong: #c3d8c7;
  --accent-soft: #263b2c;
}
html[data-theme="dark"] body.basis-tool-page .basis-tile-tone-1 {
  --surface: #211c28;
  --surface-soft: #2b2434;
  --surface-strong: #392e45;
  --border: #554566;
  --accent: #b09ac7;
  --accent-strong: #dbcde8;
  --accent-soft: #362b43;
}
html[data-theme="dark"] body.basis-tool-page .basis-tile-tone-2 {
  --surface: #262117;
  --surface-soft: #31291d;
  --surface-strong: #403426;
  --border: #5d4c35;
  --accent: #c3a36f;
  --accent-strong: #e4d0ab;
  --accent-soft: #3c3021;
}
html[data-theme="dark"] body.basis-tool-page .basis-tile-tone-3 {
  --surface: #281c20;
  --surface-soft: #342429;
  --surface-strong: #432e34;
  --border: #62434b;
  --accent: #c79ba3;
  --accent-strong: #ead0d5;
  --accent-soft: #402c32;
}

body.basis-tool-page .basis-tile {
  background: var(--surface);
  border-color: var(--border);
}
body.basis-tool-page .basis-tile .basis-tile-header,
body.basis-tool-page .basis-tile tbody tr {
  background: var(--surface);
}
body.basis-tool-page .basis-tile tbody tr:hover,
body.basis-tool-page .basis-tile tbody tr:focus-within {
  background: var(--surface-soft);
}
body.basis-tool-page .basis-tile th {
  background: var(--surface-strong);
}
body.basis-tool-page .basis-tile.is-active {
  border: 2px solid var(--comparison-active-red);
  box-shadow: 0 0 0 3px var(--comparison-active-red-soft), 0 14px 32px rgba(67, 45, 45, .11);
}
body.basis-tool-page .basis-active-word,
body.basis-tool-page .basis-tile.is-active .tile-activate-button {
  color: var(--comparison-active-red);
}
body.basis-tool-page .basis-tile.is-active .tile-activate-button {
  border-color: color-mix(in srgb, var(--comparison-active-red) 58%, var(--border));
  background: color-mix(in srgb, var(--comparison-active-red) 10%, var(--surface));
}

@media (max-width: 640px) {
  .basis-compare-launch { align-items: stretch; flex-direction: column; }
  .basis-compare-launch .button { width: 100%; }
}


/* Timed close confirmation shown only after applying a basis in the Compare Bases tab. */
.comparison-close-prompt[hidden] { display: none !important; }
.comparison-close-prompt {
  position: fixed;
  inset: 0;
  z-index: 5000;
  display: grid;
  place-items: center;
  padding: 24px;
  background: rgba(31, 40, 46, .28);
  backdrop-filter: blur(3px);
}
.comparison-close-card {
  width: min(440px, 100%);
  padding: 24px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--surface);
  box-shadow: 0 22px 60px rgba(35, 49, 58, .24);
  text-align: center;
}
.comparison-close-card h2 { margin: 4px 0 9px; }
.comparison-close-card p:not(.eyebrow) { margin: 0 0 18px; color: var(--muted); }
.comparison-close-card .button { min-width: 120px; }
body.comparison-close-prompt-open { overflow: hidden !important; }

/* In Compare Bases, the shared apply control visually matches the direct-matrix input surface. */
body.basis-tool-page #applyBasisButton {
  background: var(--surface-soft);
  color: var(--text);
  border: 1px solid var(--border);
}
body.basis-tool-page #applyBasisButton:hover {
  background: color-mix(in srgb, var(--surface-soft) 72%, var(--surface-strong));
}
body.basis-tool-page #applyBasisButton.is-applied {
  background: var(--surface-soft);
  color: var(--text);
  border-color: var(--border);
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--accent) 12%, transparent);
}