/* PSL OS Case Study styles
   Extends landing.css tokens and patterns. */

/* Ensure hidden attribute is always respected */
.psl-main [hidden] {
  display: none !important;
}

/* Main layout */
.psl-main {
  padding-top: 48px;
  padding-bottom: 72px;
  min-height: calc(100vh - 64px - 100px);
}

.psl-phase {
  max-width: 960px;
  margin: 0 auto;
}

/* Unavailable state */
.unavailable-state {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 400px;
}

.unavailable-card {
  text-align: center;
  padding: 48px;
  background: var(--paper-1);
  border-radius: var(--r-3);
  max-width: 480px;
}

.unavailable-card h1 {
  font-size: var(--h4-size);
  font-weight: var(--heading-weight);
  letter-spacing: var(--h4-tracking);
  margin-bottom: 16px;
}

.unavailable-card p {
  color: var(--ink-2);
  margin-bottom: 24px;
}

/* Intro phase */
.intro-header {
  max-width: 680px;
  margin-bottom: 48px;
}

.intro-kicker {
  font-size: var(--body-s-size);
  color: var(--green-600);
  font-weight: 500;
  margin-bottom: 12px;
}

.intro-header h1 {
  font-size: var(--h2-size);
  font-weight: var(--heading-weight);
  font-stretch: var(--display-stretch);
  letter-spacing: var(--h2-tracking);
  line-height: var(--h2-leading);
  margin-bottom: 20px;
}

.intro-lede {
  font-size: var(--body-l-size);
  line-height: var(--body-l-leading);
  color: var(--ink-2);
}

.intro-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 22px;
}

.intro-meta span {
  padding: 7px 11px;
  border: 1px solid var(--line-2);
  border-radius: 999px;
  color: var(--ink-3);
  font-size: 12px;
  line-height: 1;
}

.section-eyebrow {
  margin-bottom: 12px;
  color: var(--green-600);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.platform-context {
  margin-bottom: 52px;
  padding: clamp(28px, 4vw, 48px);
  border-radius: var(--r-3);
  background: var(--paper-1);
}

.platform-context-grid {
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.1fr);
  gap: clamp(28px, 5vw, 64px);
  align-items: start;
}

.platform-context h2,
.journey-section > h2 {
  font-size: clamp(28px, 3.5vw, 44px);
  line-height: 1.04;
  letter-spacing: -0.035em;
  font-weight: var(--heading-weight);
}

.platform-context-grid > div > p {
  margin-bottom: 14px;
  color: var(--ink-2);
  line-height: 1.65;
}

.platform-context-grid .context-note {
  margin: 20px 0 0;
  padding-top: 16px;
  border-top: 1px solid var(--line-2);
  color: var(--ink-3);
  font-size: var(--body-s-size);
}

.journey-section {
  margin-bottom: 52px;
}

.journey-section > h2 {
  max-width: 720px;
  margin-bottom: 28px;
}

.journey-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.journey-grid li {
  min-height: 220px;
  padding: 24px;
  border: 1px solid var(--line-2);
  border-radius: var(--r-3);
  background: var(--paper-0);
}

.journey-number {
  display: block;
  margin-bottom: 42px;
  color: var(--green-600);
  font-family: var(--font-mono);
  font-size: 12px;
}

.journey-grid h3,
.workflow-grid h3 {
  margin-bottom: 10px;
  font-size: 18px;
  line-height: 1.2;
}

.journey-grid p,
.workflow-grid p {
  color: var(--ink-3);
  font-size: var(--body-s-size);
  line-height: 1.55;
}

.workflow-section {
  margin-bottom: 12px;
}

.workflow-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  border-top: 1px solid var(--line-2);
  border-bottom: 1px solid var(--line-2);
}

.workflow-grid article {
  padding: 26px 24px 28px 0;
}

.workflow-grid article + article {
  padding-left: 24px;
  border-left: 1px solid var(--line-2);
}

.workflow-grid article > span {
  display: block;
  margin-bottom: 14px;
  color: var(--green-600);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.intro-actions {
  margin-top: 36px;
}

/* Task phase */
.task-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  margin-bottom: 24px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--line-3);
}

.task-progress {
  flex: 1;
}

.task-label {
  font-size: var(--body-s-size);
  font-weight: 500;
  color: var(--ink-2);
  margin-bottom: 8px;
  display: block;
}

.progress-bar {
  height: 4px;
  background: var(--paper-2);
  border-radius: 2px;
  overflow: hidden;
  max-width: 200px;
}

.progress-fill {
  height: 100%;
  background: var(--green-600);
  border-radius: 2px;
  transition: width 0.2s var(--ease-swift);
}

.btn-sm {
  height: 32px;
  padding: 0 12px;
  font-size: 13px;
}

.task-context {
  margin-bottom: 32px;
}

.task-title {
  font-size: var(--h4-size);
  font-weight: var(--heading-weight);
  letter-spacing: var(--h4-tracking);
  margin-bottom: 12px;
}

.task-description {
  font-size: var(--body-m-size);
  color: var(--ink-2);
  margin-bottom: 16px;
}

.task-input-details {
  background: var(--paper-1);
  border-radius: var(--r-3);
  margin-bottom: 16px;
}

.task-input-details summary {
  padding: 12px 16px;
  font-size: var(--body-s-size);
  font-weight: 500;
  cursor: pointer;
  color: var(--ink-2);
}

.task-input-details summary:hover {
  color: var(--ink-1);
}

.task-input-content {
  padding: 0 16px 16px;
}

.input-section {
  margin-bottom: 16px;
}

.input-section:last-child {
  margin-bottom: 0;
}

.input-section h4 {
  font-size: 12px;
  font-weight: 500;
  color: var(--ink-3);
  margin: 0 0 8px 0;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.input-text {
  margin: 0;
  padding: 12px;
  background: var(--paper-0);
  border: 1px solid var(--line-2);
  border-radius: var(--r-2);
  font-family: var(--font-mono);
  font-size: 12px;
  line-height: 1.5;
  white-space: pre-wrap;
  word-break: break-word;
  max-height: 200px;
  overflow-y: auto;
}

.task-requirements {
  margin: 0;
  padding-left: 1.2em;
  font-size: var(--body-s-size);
  color: var(--ink-3);
}

.task-requirements li {
  margin-bottom: 4px;
}

/* Response cards grid */
.responses-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  margin-bottom: 32px;
}

@media (max-width: 900px) {
  .responses-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 600px) {
  .responses-grid {
    grid-template-columns: 1fr;
  }
}

.response-card {
  background: var(--paper-0);
  border: 2px solid var(--line-2);
  border-radius: var(--r-3);
  overflow: hidden;
  cursor: pointer;
  transition: border-color 0.15s var(--ease-swift), box-shadow 0.15s var(--ease-swift);
}

.response-card:hover {
  border-color: var(--ink-3);
}

.response-card:focus-visible {
  outline: none;
  border-color: var(--focus-ring);
  box-shadow: 0 0 0 3px rgba(27, 68, 228, 0.2);
}

.response-card.selected {
  border-color: var(--green-600);
  box-shadow: 0 0 0 2px var(--green-600);
}

.response-card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 16px;
  border-bottom: 1px solid var(--line-3);
  background: var(--paper-1);
}

.response-label {
  font-size: var(--body-s-size);
  font-weight: 500;
}

.response-radio {
  width: 18px;
  height: 18px;
  border: 2px solid var(--line-2);
  border-radius: 50%;
  background: var(--paper-0);
  position: relative;
}

.response-card.selected .response-radio {
  border-color: var(--green-600);
  background: var(--green-600);
}

.response-card.selected .response-radio::after {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 6px;
  height: 6px;
  background: var(--paper-0);
  border-radius: 50%;
}

.response-card-body {
  position: relative;
  max-height: 280px;
  padding: 18px;
  overflow: hidden;
}

.response-card-body::after {
  content: '';
  position: absolute;
  right: 0;
  bottom: 0;
  left: 0;
  height: 56px;
  pointer-events: none;
  background: linear-gradient(to bottom, transparent, var(--paper-0));
}

.response-text {
  font-size: var(--body-s-size);
  line-height: 1.6;
  color: var(--ink-2);
  /* Render text safely via textContent, preserve whitespace */
  white-space: pre-wrap;
  word-break: break-word;
}

.response-card-footer {
  display: flex;
  padding: 0 16px 14px;
}

.response-view-button {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 7px 0;
  border: 0;
  background: transparent;
  color: var(--green-700, var(--green-600));
  font: inherit;
  font-size: 12px;
  font-weight: 600;
  cursor: pointer;
}

.response-view-button:hover {
  color: var(--ink-1);
}

.response-view-button:focus-visible {
  border-radius: 3px;
  outline: 2px solid var(--focus-ring);
  outline-offset: 3px;
}

.response-view-icon {
  width: 8px;
  height: 8px;
  border-top: 1.5px solid currentColor;
  border-right: 1.5px solid currentColor;
  transform: rotate(45deg);
  transition: transform 0.15s ease;
}

.response-view-button:hover .response-view-icon {
  transform: translateX(3px) rotate(45deg);
}

/* Focused response reader */
.response-reader {
  width: min(760px, calc(100vw - 40px));
  max-width: none;
  max-height: min(860px, calc(100dvh - 40px));
  margin: auto;
  padding: 0;
  overflow: hidden;
  border: 1px solid var(--line-2);
  border-radius: 22px;
  background: var(--paper-0);
  color: var(--ink-1);
  box-shadow: 0 28px 80px rgba(18, 24, 21, 0.2);
}

.response-reader::backdrop {
  background: rgba(18, 24, 21, 0.48);
  backdrop-filter: blur(4px);
}

.response-reader-shell {
  display: grid;
  grid-template-rows: auto minmax(0, 1fr) auto;
  max-height: min(860px, calc(100dvh - 40px));
}

.response-reader-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 24px 28px 20px;
  border-bottom: 1px solid var(--line-3);
}

.response-reader-kicker {
  margin: 0 0 5px;
  color: var(--green-600);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.response-reader-header h2 {
  margin: 0;
  font-size: 24px;
  line-height: 1.1;
}

.response-reader-close {
  position: relative;
  flex: 0 0 auto;
  width: 40px;
  height: 40px;
  border: 1px solid var(--line-2);
  border-radius: 50%;
  background: var(--paper-1);
  cursor: pointer;
  transition: background 0.15s ease, transform 0.15s ease;
}

.response-reader-close:hover {
  background: var(--paper-2);
  transform: rotate(4deg);
}

.response-reader-close:focus-visible {
  outline: 2px solid var(--focus-ring);
  outline-offset: 2px;
}

.response-reader-close::before,
.response-reader-close::after {
  content: '';
  position: absolute;
  top: 19px;
  left: 11px;
  width: 16px;
  height: 1.5px;
  background: currentColor;
}

.response-reader-close::before {
  transform: rotate(45deg);
}

.response-reader-close::after {
  transform: rotate(-45deg);
}

.response-reader-body {
  padding: 28px;
  overflow-y: auto;
  color: var(--ink-2);
  font-size: 15px;
  line-height: 1.7;
  white-space: pre-wrap;
  word-break: break-word;
  overscroll-behavior: contain;
}

.response-reader-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 16px 28px;
  border-top: 1px solid var(--line-3);
  background: var(--paper-1);
}

.response-reader-footer p {
  color: var(--ink-3);
  font-size: var(--body-s-size);
}

/* Task actions */
.task-actions {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 16px;
}

.selection-hint {
  font-size: var(--body-s-size);
  color: var(--ink-3);
}

.action-buttons {
  display: flex;
  gap: 12px;
}

/* Results phase */
.results-header {
  margin-bottom: 36px;
}

.results-header h1 {
  font-size: var(--h3-size);
  font-weight: var(--heading-weight);
  letter-spacing: var(--h3-tracking);
  margin-bottom: 12px;
}

.results-subtitle {
  font-size: var(--body-l-size);
  color: var(--ink-2);
}

/* Favorites section */
.favorites-section {
  margin-bottom: 48px;
}

.favorites-section h2 {
  font-size: var(--h6-size);
  font-weight: var(--subhead-weight);
  margin-bottom: 20px;
}

.favorites-grid {
  display: grid;
  gap: 16px;
}

.favorite-card {
  background: var(--paper-0);
  border: 1px solid var(--line-2);
  border-radius: var(--r-3);
  padding: 20px 24px;
}

.favorite-card-header {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 12px;
}

.favorite-task-name {
  font-size: var(--body-s-size);
  font-weight: 500;
  color: var(--ink-3);
}

.favorite-model-name {
  font-size: var(--body-m-size);
  font-weight: 500;
}

.favorite-cost {
  font-family: var(--font-mono);
  font-size: var(--body-s-size);
  color: var(--green-600);
}

.favorite-skipped {
  font-size: var(--body-s-size);
  color: var(--ink-3);
  font-style: italic;
}

/* All skipped notice */
.all-skipped-notice {
  background: var(--paper-1);
  border-radius: var(--r-3);
  padding: 20px 24px;
  margin-bottom: 36px;
}

.all-skipped-notice p {
  color: var(--ink-2);
  margin: 0;
}

/* Cost tables */
.cost-section {
  margin-bottom: 48px;
}

.cost-section h2 {
  font-size: var(--h6-size);
  font-weight: var(--subhead-weight);
  margin-bottom: 20px;
}

.cost-tables {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
}

@media (max-width: 760px) {
  .cost-tables {
    grid-template-columns: 1fr;
  }
}

.cost-table-wrap {
  background: var(--paper-0);
  border: 1px solid var(--line-2);
  border-radius: var(--r-3);
  padding: 20px 24px;
}

.cost-table-wrap h3 {
  font-size: var(--body-m-size);
  font-weight: 500;
  margin-bottom: 8px;
}

.cost-table-note {
  font-size: var(--body-s-size);
  color: var(--ink-3);
  margin-bottom: 16px;
}

.cost-table {
  width: 100%;
  border-collapse: collapse;
  font-variant-numeric: tabular-nums;
}

.cost-table th {
  font-size: 12px;
  font-weight: 400;
  color: var(--ink-3);
  text-align: left;
  padding: 0 12px 8px 0;
  border-bottom: 1px solid var(--line-2);
}

.cost-table th.n {
  text-align: right;
  padding-right: 0;
}

.cost-table td {
  font-size: var(--body-s-size);
  padding: 10px 12px 10px 0;
  border-bottom: 1px solid var(--line-3);
}

.cost-table td.n {
  text-align: right;
  font-family: var(--font-mono);
  padding-right: 0;
}

.cost-table tr:last-child td {
  border-bottom: none;
}

.cost-table .highlight td {
  background: var(--green-100);
  font-weight: 500;
}

.cost-positive {
  color: var(--green-600);
}

.cost-negative {
  color: var(--red-600);
}

/* Calculator section */
.calculator-section {
  background: var(--paper-1);
  border-radius: var(--r-3);
  padding: 28px 32px;
  margin-bottom: 48px;
}

.calculator-section h2 {
  font-size: var(--h6-size);
  font-weight: var(--subhead-weight);
  margin-bottom: 8px;
}

.calculator-note {
  font-size: var(--body-s-size);
  color: var(--ink-3);
  margin-bottom: 24px;
}

.calculator-inputs {
  display: flex;
  gap: 32px;
  margin-bottom: 24px;
  flex-wrap: wrap;
}

.calculator-field label {
  display: block;
  font-size: var(--body-s-size);
  font-weight: 500;
  margin-bottom: 8px;
}

.input-with-prefix {
  display: flex;
  align-items: center;
  background: var(--paper-0);
  border: 1px solid var(--line-2);
  border-radius: var(--r-2);
  overflow: hidden;
}

.input-prefix {
  padding: 0 0 0 12px;
  color: var(--ink-3);
  font-size: var(--body-m-size);
}

.input-with-prefix input {
  flex: 1;
  border: none;
  padding: 10px 12px 10px 4px;
  font: inherit;
  font-size: var(--body-m-size);
  font-family: var(--font-mono);
  background: transparent;
  width: 120px;
}

.input-with-prefix input:focus {
  outline: none;
}

.input-with-prefix:focus-within {
  border-color: var(--focus-ring);
  box-shadow: 0 0 0 2px rgba(27, 68, 228, 0.2);
}

.baseline-toggle {
  display: flex;
  gap: 0;
  border: 1px solid var(--line-2);
  border-radius: var(--r-2);
  overflow: hidden;
}

.baseline-option {
  padding: 10px 16px;
  font: inherit;
  font-size: var(--body-s-size);
  background: var(--paper-0);
  border: none;
  cursor: pointer;
  color: var(--ink-2);
  transition: background 0.15s, color 0.15s;
}

.baseline-option:not(:last-child) {
  border-right: 1px solid var(--line-2);
}

.baseline-option:hover {
  background: var(--paper-2);
}

.baseline-option.active {
  background: var(--ink-1);
  color: var(--text-on-inverse);
}

.calculator-results {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

@media (max-width: 800px) {
  .calculator-results {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 500px) {
  .calculator-results {
    grid-template-columns: 1fr;
    gap: 16px;
  }
}

.calc-result {
  text-align: center;
}

.calc-label {
  display: block;
  font-size: var(--body-s-size);
  color: var(--ink-3);
  margin-bottom: 4px;
}

.calc-value {
  font-size: 28px;
  font-weight: 500;
}

/* Methodology */
.methodology-details {
  background: var(--paper-1);
  border-radius: var(--r-3);
  margin-bottom: 48px;
}

.methodology-details summary {
  padding: 16px 20px;
  font-size: var(--body-m-size);
  font-weight: 500;
  cursor: pointer;
}

.methodology-content {
  padding: 0 20px 20px;
  font-size: var(--body-s-size);
  color: var(--ink-2);
  line-height: 1.6;
}

.methodology-content p {
  margin: 0 0 12px 0;
}

.methodology-content p:last-child {
  margin-bottom: 0;
}

/* Results CTA */
.results-cta {
  background: var(--green-600);
  border-radius: var(--r-3);
  padding: 32px 36px;
  color: var(--text-on-accent);
  margin-bottom: 36px;
}

.results-cta h3 {
  font-size: var(--h6-size);
  font-weight: var(--subhead-weight);
  color: inherit;
  margin-bottom: 8px;
}

.results-cta p {
  opacity: 0.85;
  margin-bottom: 20px;
}

.results-cta .btn {
  background: var(--surface-inverse);
  color: var(--text-on-inverse);
}

.results-cta .btn:hover {
  background: #000;
}

/* Results actions */
.results-actions {
  display: flex;
  justify-content: center;
  gap: 12px;
}

/* Noscript notice */
.noscript-notice {
  background: var(--paper-1);
  border-radius: var(--r-3);
  padding: 32px;
  text-align: center;
  margin-top: 48px;
}

/* Intro layout - CTA close to headline */
.intro-actions-top {
  margin-top: 24px;
}

.intro-details {
  margin-top: 48px;
}

/* Invalid input styling */
.input-with-prefix:has(input.invalid) {
  border-color: var(--red-600);
}

.input-with-prefix:has(input.invalid):focus-within {
  box-shadow: 0 0 0 2px rgba(220, 38, 38, 0.2);
}

/* Reveal section */
.reveal-section {
  margin-bottom: 48px;
}

.reveal-section h2 {
  font-size: var(--h6-size);
  font-weight: var(--subhead-weight);
  margin-bottom: 12px;
}

.reveal-intro {
  color: var(--ink-2);
  margin-bottom: 24px;
}

.reveal-task {
  background: var(--paper-0);
  border: 1px solid var(--line-2);
  border-radius: var(--r-3);
  padding: 20px 24px;
  margin-bottom: 16px;
}

.reveal-task h4 {
  font-size: var(--body-m-size);
  font-weight: 500;
  margin-bottom: 16px;
}

.reveal-list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.reveal-item {
  display: grid;
  grid-template-columns: 100px 1fr auto;
  gap: 16px;
  align-items: center;
  padding: 10px 0;
  border-bottom: 1px solid var(--line-3);
}

.reveal-item:last-child {
  border-bottom: none;
}

.reveal-item.reveal-selected {
  background: var(--green-100);
  margin: 0 -12px;
  padding: 10px 12px;
  border-radius: var(--r-2);
}

.reveal-label {
  font-size: var(--body-s-size);
  color: var(--ink-3);
  font-weight: 500;
}

.reveal-model {
  font-size: var(--body-s-size);
  font-weight: 500;
}

.reveal-cost {
  font-family: var(--font-mono);
  font-size: var(--body-s-size);
  color: var(--green-600);
}

.reveal-response-details {
  grid-column: 1 / -1;
  margin-top: 8px;
}

.reveal-response-details summary {
  font-size: 12px;
  color: var(--ink-3);
  cursor: pointer;
}

.reveal-response-details summary:hover {
  color: var(--ink-1);
}

.reveal-response-text {
  margin-top: 12px;
  padding: 12px;
  background: var(--paper-1);
  border-radius: var(--r-2);
  font-size: var(--body-s-size);
  line-height: 1.6;
  color: var(--ink-2);
  white-space: pre-wrap;
  word-break: break-word;
  max-height: 300px;
  overflow-y: auto;
}

/* Responsive adjustments */
@media (max-width: 760px) {
  .intro-header h1 {
    font-size: clamp(32px, 8vw, 64px);
  }

  .intro-header {
    margin-bottom: 36px;
  }

  .platform-context {
    margin-inline: -8px;
    margin-bottom: 40px;
    padding: 28px 24px;
  }

  .platform-context-grid,
  .journey-grid,
  .workflow-grid {
    grid-template-columns: 1fr;
  }

  .platform-context-grid {
    gap: 22px;
  }

  .journey-grid li {
    min-height: 0;
  }

  .journey-number {
    margin-bottom: 28px;
  }

  .workflow-grid article,
  .workflow-grid article + article {
    padding: 24px 0;
    border-left: none;
  }

  .workflow-grid article + article {
    border-top: 1px solid var(--line-2);
  }

  .task-header {
    flex-direction: column;
    align-items: stretch;
    gap: 16px;
  }

  .task-nav {
    order: -1;
    align-self: flex-end;
  }

  .calculator-inputs {
    flex-direction: column;
    gap: 20px;
  }

  .reveal-item {
    grid-template-columns: 1fr;
    gap: 4px;
  }

  .reveal-cost {
    justify-self: start;
  }

  .response-reader {
    width: 100%;
    max-height: calc(100dvh - 24px);
    margin: auto 0 0;
    border-width: 1px 0 0;
    border-radius: 22px 22px 0 0;
  }

  .response-reader-shell {
    max-height: calc(100dvh - 24px);
  }

  .response-reader-header {
    padding: 20px 20px 16px;
  }

  .response-reader-body {
    padding: 22px 20px 28px;
    font-size: 14px;
  }

  .response-reader-footer {
    align-items: stretch;
    flex-direction: column;
    gap: 10px;
    padding: 14px 20px max(18px, env(safe-area-inset-bottom));
  }

  .response-reader-footer .btn {
    justify-content: center;
    width: 100%;
  }
}

/* Phase headings receive programmatic focus without a control outline. */
.psl-phase h1[tabindex="-1"]:focus, .psl-phase h2[tabindex="-1"]:focus { outline: none; }
.reveal-section > summary { cursor: pointer; font-weight: 600; padding: 16px 0; }
.bill-error { color: #982b25; font-size: 13px; max-width: 270px; margin-top: 8px; }