:root {
  color-scheme: dark;
  --bg: #0d1213;
  --surface: #151b1d;
  --surface-soft: #1d2527;
  --surface-raised: #20292b;
  --ink: #eef7f5;
  --muted: #a0b0b0;
  --line: #2b3638;
  --line-strong: #455355;
  --teal: #49c4b6;
  --teal-strong: #85ddd4;
  --teal-soft: #143935;
  --amber: #dca350;
  --amber-soft: #32291b;
  --red: #dc6e62;
  --shadow: 0 18px 44px rgba(0, 0, 0, 0.32);
  --radius: 6px;
  --font: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

* {
  box-sizing: border-box;
}

[hidden] {
  display: none !important;
}

html {
  min-height: 100%;
  background: var(--bg);
}

body {
  min-height: 100vh;
  width: 100%;
  max-width: 100%;
  margin: 0;
  background:
    radial-gradient(circle at 18% -18%, rgba(73, 196, 182, 0.12), transparent 36%),
    linear-gradient(180deg, #101718 0%, var(--bg) 42%, #090d0e 100%);
  color: var(--ink);
  font-family: var(--font);
  letter-spacing: 0;
  overflow-x: hidden;
}

button {
  font: inherit;
}

.app-shell {
  min-height: 100vh;
  width: 100%;
  max-width: 100vw;
  overflow-x: hidden;
  display: grid;
  grid-template-rows: auto 1fr auto;
}

.topbar {
  min-height: 58px;
  padding: 10px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  background: rgba(15, 21, 22, 0.94);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(14px);
  position: sticky;
  top: 0;
  z-index: 5;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  min-width: 0;
  color: var(--ink);
  font-size: 14px;
  font-weight: 760;
  line-height: 1.25;
  text-decoration: none;
}

.brand-copy {
  display: grid;
  gap: 3px;
  min-width: 0;
}

.brand-copy span:first-child {
  color: var(--ink);
  font-weight: 780;
  overflow-wrap: anywhere;
}

.brand-copy span:last-child {
  color: var(--muted);
  font-size: 12px;
  font-weight: 560;
}

.brand-mark {
  width: 42px;
  height: 42px;
  flex: 0 0 42px;
  display: grid;
  place-items: center;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius);
  background: linear-gradient(180deg, #202a2c, var(--surface));
  position: relative;
}

.brand-mark svg {
  width: 25px;
  height: 25px;
  fill: none;
  stroke: var(--teal);
  stroke-width: 1.7;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.tool-badge {
  align-self: start;
  padding: 3px 8px;
  border: 1px solid var(--line-strong);
  border-radius: 5px;
  background: var(--surface-soft);
  color: var(--muted);
  font-size: 11px;
  font-weight: 760;
  line-height: 1.2;
  white-space: nowrap;
}

.top-actions,
.result-actions {
  display: flex;
  align-items: center;
  gap: 10px;
  min-width: 0;
}

.authors-badge {
  max-width: 210px;
  color: #8fa2a1;
  font-size: 11px;
  font-weight: 680;
  line-height: 1.25;
  text-align: right;
}

.language-control {
  min-height: 34px;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 0 9px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
  color: var(--muted);
  font-size: 12px;
  font-weight: 720;
}

.language-control select {
  min-width: 102px;
  border: 0;
  background: transparent;
  color: var(--ink);
  font: inherit;
  font-weight: 760;
  outline: none;
}

.icon-button,
.text-button {
  min-height: 34px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
  color: var(--ink);
  cursor: pointer;
  transition: border-color 160ms ease, transform 160ms ease, background 160ms ease, color 160ms ease;
}

.icon-button {
  width: auto;
  min-width: 34px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 7px;
  padding: 0 10px;
  font-size: 12px;
  font-weight: 720;
}

.icon-button svg {
  width: 18px;
  height: 18px;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.8;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.text-button {
  padding: 0 13px;
  font-size: 12px;
  font-weight: 720;
}

#backButton {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  min-width: 82px;
  background: rgba(220, 163, 80, 0.14);
  border-color: var(--amber);
  color: #ffe3b5;
  font-weight: 800;
  box-shadow: inset 0 0 0 1px rgba(220, 163, 80, 0.18), 0 0 0 1px rgba(220, 163, 80, 0.08);
}

#backButton:hover,
#backButton:focus-visible {
  background: rgba(220, 163, 80, 0.22);
  border-color: #f0bf73;
  color: #fff0d6;
  outline: none;
}

.text-button.primary {
  background: var(--teal);
  border-color: var(--teal);
  color: #071111;
}

.icon-button:hover,
.text-button:hover,
.matrix-cell:hover {
  border-color: var(--teal);
  transform: none;
}

.icon-button:disabled,
.text-button:disabled {
  color: #5b686a;
  cursor: not-allowed;
  transform: none;
}

#backButton:disabled {
  background: rgba(220, 163, 80, 0.06);
  border-color: rgba(220, 163, 80, 0.36);
  color: #8f7b5a;
  box-shadow: inset 0 0 0 1px rgba(220, 163, 80, 0.06);
}

.text-button.primary:hover {
  background: var(--teal-strong);
}

.workspace {
  display: grid;
  grid-template-columns: minmax(220px, 280px) minmax(0, 1fr) minmax(220px, 270px);
  gap: 14px;
  padding: 14px 18px 18px;
  min-width: 0;
}

.history-panel,
.reference-panel,
.question-panel,
.result-panel,
.method-preview {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: 0 1px 0 rgba(255, 255, 255, 0.03), var(--shadow);
}

.history-panel,
.reference-panel {
  padding: 16px;
  min-height: 0;
}

.panel-heading p,
.section-label {
  margin: 0 0 6px;
  color: var(--teal);
  font-size: 10px;
  font-weight: 780;
  line-height: 1;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.panel-heading h2 {
  margin: 0 0 16px;
  font-size: 16px;
  line-height: 1.2;
}

.history-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  gap: 10px;
  counter-reset: step;
}

.history-list li {
  display: grid;
  gap: 5px;
  padding: 10px 0 10px 26px;
  border-top: 1px solid var(--line);
  position: relative;
}

.history-list li::before {
  counter-increment: step;
  content: counter(step);
  width: 18px;
  height: 18px;
  display: grid;
  place-items: center;
  border-radius: 5px;
  background: var(--teal-soft);
  color: var(--teal-strong);
  font-size: 11px;
  font-weight: 820;
  position: absolute;
  left: 0;
  top: 10px;
}

.history-list li::after {
  content: "";
  width: 1px;
  height: calc(100% + 10px);
  background: var(--line);
  position: absolute;
  left: 9px;
  top: 28px;
}

.history-list li:last-child::after {
  display: none;
}

.history-question {
  color: var(--muted);
  font-size: 12px;
  line-height: 1.4;
}

.history-answer {
  color: var(--ink);
  font-size: 13px;
  font-weight: 760;
  line-height: 1.35;
}

.empty-history,
.note-box {
  color: var(--muted);
  font-size: 13px;
  line-height: 1.55;
}

.path-progress {
  display: grid;
  gap: 8px;
  margin: 4px 0 18px;
  padding-bottom: 14px;
  border-bottom: 1px solid var(--line);
}

.path-progress > div:first-child {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  color: var(--ink);
  font-size: 13px;
}

.path-progress span {
  color: var(--muted);
  font-size: 12px;
  font-weight: 760;
}

.progress-track.compact {
  height: 5px;
}

.rail-label {
  margin: 0 0 10px;
  color: var(--muted);
  font-size: 11px;
  font-weight: 760;
}

.lab-path-steps {
  display: grid;
  gap: 0;
  margin-bottom: 16px;
}

.lab-path-step {
  display: grid;
  grid-template-columns: 24px minmax(0, 1fr);
  gap: 8px 10px;
  padding: 10px 10px 10px 0;
  border-left: 3px solid transparent;
  color: var(--muted);
}

.lab-path-step span {
  width: 24px;
  height: 24px;
  display: grid;
  place-items: center;
  border-radius: 50%;
  background: #273234;
  color: #91a3a3;
  font-size: 11px;
  font-weight: 820;
}

.lab-path-step strong {
  min-width: 0;
  color: inherit;
  font-size: 13px;
  line-height: 1.25;
}

.lab-path-step small {
  grid-column: 2;
  margin-top: -4px;
  color: var(--muted);
  font-size: 12px;
}

.lab-path-step.active {
  border-left-color: var(--teal);
  color: var(--teal-strong);
  background: linear-gradient(90deg, rgba(73, 196, 182, 0.12), transparent);
}

.lab-path-step.active span {
  background: var(--teal);
  color: #071111;
}

.lab-path-step.complete span {
  background: var(--teal-soft);
  color: var(--teal-strong);
}

.decision-stage {
  min-width: 0;
  display: grid;
  grid-template-rows: auto auto auto;
  gap: 10px;
}

.progress-strip {
  min-height: 36px;
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 12px;
  color: var(--muted);
  font-size: 11px;
  font-weight: 760;
}

.progress-track {
  height: 4px;
  border-radius: 0;
  background: #253033;
  overflow: hidden;
}

.progress-track span {
  display: block;
  width: 8%;
  height: 100%;
  background: var(--teal);
  border-radius: inherit;
  transition: width 260ms ease;
}

.question-panel,
.result-panel {
  min-height: 100%;
  min-width: 0;
  padding: clamp(18px, 2.5vw, 28px);
  display: grid;
  align-content: start;
  position: relative;
  overflow: hidden;
}

.method-preview {
  padding: 16px;
}

.panel-topline {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 14px;
  color: #d5e3e1;
  font-size: 11px;
  font-weight: 820;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.required-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 5px 9px;
  border: 1px solid rgba(220, 163, 80, 0.46);
  border-radius: 5px;
  background: var(--amber-soft);
  color: #f4c981;
  text-transform: none;
  letter-spacing: 0;
  font-size: 12px;
}

.required-badge::before {
  content: "";
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--amber);
}

.answer-instruction {
  margin: 14px 0 10px;
  color: var(--ink);
  font-size: 13px;
  font-weight: 760;
}

.question-panel::before,
.result-panel::before {
  display: none;
}

.node-marker {
  width: 44px;
  height: 44px;
  display: grid;
  place-items: center;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius);
  background: var(--surface-soft);
  position: relative;
  flex: 0 0 44px;
}

.node-marker::before,
.node-marker::after {
  content: "";
  position: absolute;
  background: var(--line-strong);
}

.node-marker::before {
  width: 1px;
  height: 28px;
}

.node-marker::after {
  width: 28px;
  height: 1px;
}

.node-marker span {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--teal);
  border: 4px solid var(--surface);
  box-shadow: 0 0 0 1px var(--teal);
  z-index: 1;
}

.current-node,
.result-node {
  display: grid;
  grid-template-columns: 44px minmax(0, 1fr);
  gap: 16px;
  align-items: start;
  width: 100%;
  margin: 0;
  padding: 16px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface-raised);
  position: relative;
  z-index: 1;
}

.current-node::before,
.result-node::before {
  display: none;
}

.question-copy,
.result-heading {
  max-width: 760px;
  min-width: 0;
  position: relative;
  z-index: 1;
}

.question-copy h1,
.result-heading h1 {
  margin: 0;
  font-size: clamp(24px, 2.6vw, 34px);
  line-height: 1.08;
  letter-spacing: 0;
  overflow-wrap: anywhere;
}

.question-copy p:not(.section-label),
.result-heading p:not(.section-label) {
  max-width: 720px;
  margin: 12px 0 0;
  color: var(--muted);
  font-size: 14px;
  line-height: 1.55;
}

.answers {
  --branch-count: 2;
  display: grid;
  grid-template-columns: 1fr;
  gap: 8px;
  margin-top: 12px;
  padding-top: 0;
  position: relative;
  z-index: 1;
}

.answers::before {
  display: none;
}

.answer-button {
  min-height: 68px;
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: center;
  gap: 12px;
  padding: 12px 12px 12px 14px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface-raised);
  color: var(--ink);
  text-align: left;
  cursor: pointer;
  transition: border-color 160ms ease, box-shadow 160ms ease, transform 160ms ease, background 160ms ease;
  position: relative;
}

.answer-button::before {
  content: "";
  width: 3px;
  height: calc(100% - 20px);
  background: var(--line);
  position: absolute;
  left: 0;
  top: 10px;
}

.answer-button::after {
  display: none;
}

.answer-button.branch-result {
  border-color: rgba(220, 163, 80, 0.52);
  background: var(--amber-soft);
}

.answer-button.branch-result::before {
  background: var(--amber);
}

.answer-button.branch-result .branch-action {
  background: var(--amber-soft);
  border-color: rgba(220, 163, 80, 0.52);
  color: #f2c578;
}

.branch-copy {
  min-width: 0;
}

.branch-label {
  display: block;
  font-size: 14px;
  font-weight: 820;
  line-height: 1.35;
}

.branch-action {
  min-height: 30px;
  display: inline-flex;
  align-items: center;
  gap: 7px;
  justify-self: end;
  padding: 0 6px 0 10px;
  border: 1px solid rgba(73, 196, 182, 0.42);
  border-radius: var(--radius);
  background: var(--teal-soft);
  color: var(--teal-strong);
  font-size: 11px;
  font-weight: 820;
  line-height: 1;
  white-space: nowrap;
}

.branch-arrow {
  width: 20px;
  height: 20px;
  display: grid;
  place-items: center;
  border-radius: 50%;
  background: rgba(8, 15, 16, 0.42);
  color: currentColor;
  font-size: 18px;
  line-height: 1;
}

.tree-junction {
  display: none;
}

.tree-junction::before {
  content: "";
  width: 1px;
  height: 100%;
  background: var(--line-strong);
  position: absolute;
  left: 50%;
  top: 0;
}

.tree-junction span {
  width: 15px;
  height: 15px;
  border-radius: 50%;
  background: var(--teal);
  border: 4px solid var(--surface);
  box-shadow: 0 0 0 1px var(--teal);
  position: absolute;
  left: calc(50% - 7px);
  bottom: -7px;
}

.result-marker {
  background: var(--amber-soft);
  border-color: rgba(220, 163, 80, 0.58);
}

.result-marker span {
  background: var(--amber);
  box-shadow: 0 0 0 1px var(--amber);
}

.answer-button:hover,
.answer-button:focus-visible {
  border-color: var(--teal);
  background: #243033;
  box-shadow: none;
  outline: none;
  transform: none;
}

.answer-button:hover .branch-action,
.answer-button:focus-visible .branch-action {
  border-color: var(--teal);
  background: rgba(73, 196, 182, 0.16);
}

.answer-button.branch-result:hover,
.answer-button.branch-result:focus-visible {
  border-color: var(--amber);
  background: #3a2d1b;
}

.answer-button.branch-result:hover .branch-action,
.answer-button.branch-result:focus-visible .branch-action {
  border-color: var(--amber);
  background: rgba(220, 163, 80, 0.16);
}

.result-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
  margin: 14px 0 18px;
  position: relative;
  z-index: 1;
}

.result-grid section,
.note-box {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface-soft);
  padding: 14px;
}

.result-grid h2,
.note-box h3,
.help-dialog h3 {
  margin: 0 0 10px;
  font-size: 11px;
  line-height: 1.25;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--teal-strong);
}

.result-grid ul {
  margin: 0;
  padding-left: 18px;
  color: var(--muted);
  font-size: 13px;
  line-height: 1.5;
}

#assumptionsList {
  display: grid;
  gap: 8px;
  padding-left: 0;
  list-style: none;
}

#assumptionsList li {
  min-width: 0;
}

.assumption-detail-button {
  width: 100%;
  min-height: 42px;
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: center;
  gap: 10px;
  padding: 9px 10px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface-raised);
  color: var(--muted);
  font-size: 13px;
  line-height: 1.35;
  text-align: left;
  cursor: pointer;
  transition: border-color 160ms ease, background 160ms ease, color 160ms ease;
}

.assumption-detail-button:hover,
.assumption-detail-button:focus-visible {
  border-color: rgba(73, 196, 182, 0.68);
  background: linear-gradient(90deg, rgba(73, 196, 182, 0.12), var(--surface-raised));
  color: var(--ink);
  outline: none;
}

.assumption-detail-action {
  min-height: 26px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0 8px;
  border: 1px solid rgba(73, 196, 182, 0.42);
  border-radius: var(--radius);
  background: var(--teal-soft);
  color: var(--teal-strong);
  font-size: 11px;
  font-weight: 820;
  line-height: 1;
  white-space: nowrap;
}

.dataset-section p {
  margin: 0 0 12px;
  color: var(--muted);
  font-size: 13px;
  line-height: 1.45;
}

.dataset-download-link {
  min-height: 32px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0 12px;
  border: 1px solid rgba(73, 196, 182, 0.48);
  border-radius: var(--radius);
  background: var(--teal-soft);
  color: var(--teal-strong);
  font-size: 12px;
  font-weight: 820;
  line-height: 1.1;
  text-decoration: none;
}

.dataset-download-link:hover,
.dataset-download-link:focus-visible {
  border-color: var(--teal);
  background: rgba(73, 196, 182, 0.16);
  outline: none;
}

.preview-grid {
  display: grid;
  grid-template-columns: 0.9fr minmax(0, 1.7fr) 1fr;
  gap: 12px;
}

.preview-grid section,
.preview-box,
.preview-screenshot > div {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface-soft);
  padding: 12px;
}

.preview-grid h2 {
  margin: 0 0 9px;
  color: #d5e3e1;
  font-size: 11px;
  line-height: 1.25;
}

.preview-grid p {
  margin: 0 0 16px;
  color: var(--muted);
  font-size: 13px;
  line-height: 1.45;
}

.preview-grid p:last-child {
  margin-bottom: 0;
}

.preview-tabs {
  display: flex;
  gap: 6px;
  margin-bottom: 8px;
}

.preview-tabs span {
  padding: 6px 10px;
  border: 1px solid var(--line);
  border-radius: 5px;
  background: var(--surface-raised);
  color: var(--muted);
  font-size: 11px;
  font-weight: 760;
}

.preview-tabs span:first-child {
  border-color: var(--teal);
  color: var(--teal-strong);
}

.preview-screenshot > div {
  min-height: 148px;
  display: grid;
  place-items: center;
  gap: 8px;
  border-style: dashed;
  text-align: center;
}

.preview-screenshot span {
  color: #657477;
  font-size: 32px;
  line-height: 1;
}

.scenario-section,
.apa-section {
  grid-column: 1 / -1;
}

.scenario-list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
}

.scenario-item {
  min-width: 0;
}

.scenario-item + .scenario-item {
  padding-left: 14px;
  border-left: 1px solid var(--line);
}

.scenario-item h3 {
  margin: 0 0 8px;
  color: var(--ink);
  font-size: 12px;
  line-height: 1.25;
}

.scenario-item p {
  margin: 0;
  color: var(--muted);
  font-size: 13px;
  line-height: 1.5;
}

.apa-list {
  display: grid;
  gap: 10px;
}

.apa-item {
  display: grid;
  gap: 7px;
  padding: 10px 12px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface-raised);
}

.apa-item h3 {
  margin: 0;
  color: var(--ink);
  font-size: 12px;
  line-height: 1.25;
}

.apa-item p,
.apa-item code {
  margin: 0;
  color: var(--muted);
  font-size: 13px;
  line-height: 1.55;
}

.apa-item code {
  display: block;
  white-space: pre-wrap;
  overflow-wrap: anywhere;
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", monospace;
}

.procedure-heading {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 12px;
}

.procedure-heading h2 {
  margin: 0;
}

.procedure-control {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--muted);
  font-size: 12px;
  font-weight: 720;
}

.procedure-control select {
  min-height: 32px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
  color: var(--ink);
  font: inherit;
  font-weight: 760;
  padding: 0 8px;
}

.procedure-output {
  min-height: 118px;
  margin: 0;
  padding: 12px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: #111719;
  color: var(--muted);
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", monospace;
  font-size: 12px;
  line-height: 1.55;
  white-space: pre-wrap;
  overflow-wrap: anywhere;
}

.jamovi-screenshot {
  margin: -8px 0 28px;
  position: relative;
  z-index: 1;
}

.jamovi-screenshot img {
  display: block;
  width: 100%;
  max-height: 460px;
  object-fit: contain;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: #ffffff;
}

.jamovi-screenshot figcaption {
  margin-top: 8px;
  color: var(--muted);
  font-size: 12px;
  line-height: 1.4;
}

.reference-matrix {
  display: grid;
  gap: 8px;
  margin-bottom: 14px;
}

.matrix-cell {
  display: flex;
  align-items: center;
  gap: 12px;
  min-height: 44px;
  padding: 8px 10px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface-raised);
  color: var(--ink);
  cursor: pointer;
  text-align: left;
  font-size: 12px;
  font-weight: 760;
  transition: border-color 160ms ease, transform 160ms ease, background 160ms ease;
}

.matrix-cell span:first-child {
  width: 26px;
  height: 26px;
  display: grid;
  place-items: center;
  border-radius: var(--radius);
  background: var(--surface-soft);
  color: var(--muted);
  font-size: 11px;
}

.matrix-cell span:last-child {
  min-width: 0;
  overflow-wrap: anywhere;
}

.matrix-cell.active {
  border-color: var(--teal);
  background: var(--teal-soft);
  box-shadow: inset 3px 0 0 var(--teal);
}

.matrix-cell.active span:first-child {
  background: var(--teal);
  color: #071111;
}

.note-box {
  background: var(--amber-soft);
  border-color: rgba(220, 163, 80, 0.46);
}

.note-box p {
  margin: 0;
}

.abbreviations-box {
  margin-top: 14px;
  padding: 14px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface-soft);
}

.abbreviations-box h3 {
  margin: 0 0 12px;
  color: #d5e3e1;
  font-size: 11px;
  line-height: 1.25;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.abbreviations-box dl {
  display: grid;
  gap: 9px;
  margin: 0;
}

.abbreviations-box div {
  display: grid;
  grid-template-columns: 32px minmax(0, 1fr);
  gap: 9px;
  align-items: baseline;
}

.abbreviations-box dt {
  color: var(--ink);
  font-size: 12px;
  font-weight: 820;
}

.abbreviations-box dd {
  margin: 0;
  color: var(--muted);
  font-size: 12px;
  line-height: 1.35;
}

.lab-footer {
  min-height: 42px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 0 18px;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 12px;
}

.footer-contact {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  white-space: nowrap;
}

.footer-contact a {
  color: var(--teal-strong);
  font-weight: 760;
  text-decoration: none;
}

.footer-contact a:hover,
.footer-contact a:focus-visible {
  color: var(--teal);
  text-decoration: underline;
  outline: none;
}

.help-dialog,
.search-dialog,
.assumption-dialog {
  width: min(640px, calc(100vw - 32px));
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 24px;
  background: var(--surface);
  color: var(--ink);
  box-shadow: var(--shadow);
}

.help-dialog::backdrop,
.search-dialog::backdrop,
.assumption-dialog::backdrop {
  background: rgba(3, 8, 9, 0.68);
  backdrop-filter: blur(4px);
}

.help-dialog h2,
.search-dialog h2,
.assumption-dialog h2 {
  margin: 0 44px 14px 0;
  font-size: 24px;
  line-height: 1.1;
}

.help-dialog p,
.search-dialog p,
.assumption-dialog p {
  color: var(--muted);
  line-height: 1.58;
}

.assumption-dialog {
  border-color: rgba(73, 196, 182, 0.46);
}

.dialog-kicker {
  margin: 0 44px 7px 0;
  color: var(--teal-strong);
  font-size: 11px;
  font-weight: 820;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.assumption-dialog-summary {
  margin: 0;
  color: #d6e2e0;
  font-size: 14px;
}

.assumption-dialog-section {
  margin-top: 14px;
  padding: 14px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface-soft);
}

.assumption-dialog-section h3 {
  margin: 0 0 8px;
  color: var(--ink);
  font-size: 13px;
  line-height: 1.25;
}

.assumption-dialog-section p {
  margin: 0;
  font-size: 13px;
}

.close-dialog {
  position: absolute;
  right: 18px;
  top: 18px;
}

.help-columns {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  margin-top: 20px;
}

.help-columns section {
  padding: 14px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.search-field {
  display: grid;
  gap: 7px;
  margin-top: 18px;
  color: var(--muted);
  font-size: 12px;
  font-weight: 760;
}

.search-field input {
  width: 100%;
  min-height: 42px;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius);
  padding: 0 12px;
  background: var(--surface-raised);
  color: var(--ink);
  font: inherit;
  outline: none;
}

.search-field input:focus {
  border-color: var(--teal);
  box-shadow: 0 0 0 3px rgba(73, 196, 182, 0.14);
}

.search-results {
  display: grid;
  gap: 8px;
  margin-top: 14px;
}

.search-result-button {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 11px 12px;
  background: var(--surface-soft);
  color: var(--ink);
  text-align: left;
  cursor: pointer;
}

.search-result-button:hover,
.search-result-button:focus-visible {
  border-color: var(--teal);
  background: var(--teal-soft);
  outline: none;
}

.search-result-button strong {
  display: block;
  margin-bottom: 4px;
  color: var(--teal-strong);
  font-size: 13px;
  line-height: 1.25;
}

.search-result-button span {
  display: block;
  color: var(--muted);
  font-size: 12px;
  line-height: 1.4;
}

.search-empty {
  margin: 12px 0 0;
  font-size: 13px;
}

.toast {
  min-width: 220px;
  position: fixed;
  left: 50%;
  bottom: 22px;
  transform: translateX(-50%) translateY(16px);
  padding: 10px 14px;
  border-radius: var(--radius);
  background: var(--teal);
  color: #071111;
  font-size: 12px;
  font-weight: 720;
  opacity: 0;
  pointer-events: none;
  transition: opacity 180ms ease, transform 180ms ease;
}

.toast.visible {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
}

@media (max-width: 1080px) {
  .workspace {
    grid-template-columns: 250px minmax(0, 1fr);
  }

  .reference-panel {
    grid-column: 1 / -1;
    min-height: 0;
  }

  .reference-matrix {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .preview-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 760px) {
  .topbar {
    display: grid;
    grid-template-columns: 1fr;
    align-items: start;
    gap: 12px;
    padding: 14px;
    overflow-x: hidden;
  }

  .brand {
    width: 100%;
    max-width: 100%;
    align-items: flex-start;
  }

  .brand-copy {
    max-width: calc(100vw - 76px);
    display: -webkit-box;
    overflow: hidden;
    -webkit-box-orient: vertical;
    -webkit-line-clamp: 2;
  }

  .brand-copy span:last-child,
  .tool-badge {
    display: none;
  }

  .top-actions {
    width: 100%;
    display: grid;
    grid-template-columns: repeat(12, minmax(0, 1fr));
    gap: 8px;
  }

  .top-actions > * {
    min-width: 0;
  }

  .language-control {
    grid-column: 1 / 11;
    min-width: 0;
    padding: 0 8px;
  }

  .top-actions .icon-button {
    grid-column: 11 / 13;
    width: 100%;
    padding: 0;
  }

  .top-actions .icon-button span {
    display: none;
  }

  .language-control span {
    display: none;
  }

  .language-control select {
    min-width: 0;
    width: 100%;
  }

  .top-actions .text-button {
    grid-column: span 6;
    width: 100%;
    padding: 0 8px;
    font-size: 12px;
    white-space: normal;
  }

  .authors-badge {
    grid-column: 1 / -1;
    max-width: none;
    text-align: left;
  }

  .workspace {
    grid-template-columns: 1fr;
    width: 100%;
    max-width: 100vw;
    overflow-x: hidden;
    padding: 14px;
  }

  .workspace > * {
    width: calc(100vw - 28px);
    max-width: calc(100vw - 28px);
    min-width: 0;
  }

  .history-panel,
  .reference-panel {
    min-height: 0;
  }

  .decision-stage {
    grid-row: 1;
    width: calc(100vw - 28px);
    max-width: calc(100vw - 28px);
    min-width: 0;
    overflow-x: hidden;
  }

  .question-panel,
  .result-panel,
  .method-preview {
    width: 100%;
    max-width: 100%;
    min-width: 0;
    min-height: 0;
    padding: 14px;
  }

  .answers,
  .result-grid,
  .preview-grid,
  .scenario-list,
  .help-columns,
  .reference-matrix {
    grid-template-columns: 1fr;
  }

  .assumption-detail-button {
    grid-template-columns: 1fr;
  }

  .assumption-detail-action {
    justify-self: start;
  }

  .scenario-item + .scenario-item {
    padding-left: 0;
    padding-top: 14px;
    border-left: 0;
    border-top: 1px solid var(--line);
  }

  .current-node,
  .result-node {
    grid-template-columns: 1fr;
    gap: 16px;
    padding: 14px;
    width: 100%;
    max-width: 100%;
    min-width: 0;
  }

  .question-copy,
  .result-heading {
    width: 100%;
    min-width: 0;
  }

  .node-marker {
    width: 40px;
    height: 40px;
    flex-basis: 40px;
  }

  .question-copy h1,
  .result-heading h1 {
    max-width: 100%;
    font-size: 20px;
    line-height: 1.16;
    overflow-wrap: normal;
    word-break: normal;
    hyphens: none;
  }

  .question-copy p:not(.section-label),
  .result-heading p:not(.section-label) {
    font-size: 15px;
  }

  .answer-button {
    grid-template-columns: 1fr;
    min-height: 68px;
  }

  .branch-action {
    justify-self: start;
    white-space: normal;
  }

  .procedure-heading {
    align-items: flex-start;
    flex-direction: column;
  }

  .answers {
    gap: 8px;
    margin-top: 12px;
  }

  .answers::before {
    display: none;
  }

  .answer-button::before {
    left: 0;
  }

  .answer-button::after {
    display: none;
  }
}

@media (max-width: 520px) {
  .topbar,
  .workspace,
  .lab-footer {
    width: min(100%, 390px);
    max-width: 390px;
  }

  .workspace > *,
  .decision-stage {
    width: 100%;
    max-width: 100%;
  }

  .lab-footer {
    align-items: flex-start;
    flex-direction: column;
    padding: 10px 14px;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
  }
}