:root {
  color-scheme: light;
  --font-ui: "Atlassian Sans", "Trebuchet MS", ui-sans-serif, sans-serif;
  --font-reading: "Iowan Old Style", Georgia, "Times New Roman", serif;
  --chat-font-scale: 1;
  --text: #292a2e;
  --text-subtle: #505258;
  --text-subtlest: #6b6e76;
  --surface: #ffffff;
  --surface-sunken: #f8f8f8;
  --surface-container: #f0f1f2;
  --surface-overlay: #ffffff;
  --border: #0b120e24;
  --border-strong: #8c8f97;
  --border-focused: #4688ec;
  --brand: #1868db;
  --brand-pressed: #1558bc;
  --brand-soft: #e9f2fe;
  --teal: #2898bd;
  --teal-soft: #e7f9ff;
  --sage: #6a9a23;
  --sage-soft: #efffd6;
  --sun: #fca700;
  --sun-soft: #fff5db;
  --coral: #e2483d;
  --coral-soft: #ffeceb;
  --brand-ink: #102b4d;
  --toast-background: #102b4d;
  --toast-text: #ffffff;
  --toast-border: #234b73;
  --page-canvas: #f3f4f5;
  --paper-line: #102b4d1a;
  --radius-small: 0.25rem;
  --radius-medium: 0.375rem;
  --radius-large: 0.5rem;
  --radius-xlarge: 0.75rem;
  --radius-full: 624.9375rem;
  --shadow-raised: 0 1px 1px #1e1f2140, 0 0 1px #1e1f214f;
  --shadow-overlay: 0 8px 12px #1e1f2126, 0 0 1px #1e1f214f;
  --duration-fast: 100ms;
  --duration-short: 150ms;
  --duration-medium: 200ms;
}

html[data-theme="dark"] {
  color-scheme: dark;
  --text: #f1f2f4;
  --text-subtle: #c7c9ce;
  --text-subtlest: #a7aab2;
  --surface: #17191c;
  --surface-sunken: #101214;
  --surface-container: #22252a;
  --surface-overlay: #24272c;
  --border: #ffffff1c;
  --border-strong: #747982;
  --brand: #669df1;
  --brand-pressed: #8fb8f6;
  --brand-soft: #1c3655;
  --teal: #6cc3e0;
  --teal-soft: #143541;
  --sage: #b3df72;
  --sage-soft: #26331a;
  --sun: #fbc828;
  --sun-soft: #3a2d0d;
  --coral: #f87168;
  --coral-soft: #40201e;
  --brand-ink: #d6e8f2;
  --toast-background: #d6e8f2;
  --toast-text: #102b4d;
  --toast-border: #ffffff;
  --page-canvas: #0f1113;
  --paper-line: #d6e8f21c;
  --shadow-raised: 0 1px 1px #0000004f, 0 0 1px #00000066;
  --shadow-overlay: 0 8px 12px #00000066, 0 0 1px #00000088;
}

* {
  box-sizing: border-box;
}

html,
body {
  min-width: 320px;
  min-height: 100%;
  height: 100%;
  margin: 0;
  overflow: hidden;
}

body {
  background: var(--surface-sunken);
  color: var(--text);
  font-family: var(--font-ui);
  font-size: 0.875rem;
  line-height: 1.45;
  text-rendering: optimizeLegibility;
}

button,
input {
  font: inherit;
}

button {
  color: inherit;
}

button,
a,
input {
  -webkit-tap-highlight-color: transparent;
}

button:focus-visible,
a:focus-visible,
input:focus-visible,
[tabindex]:focus-visible {
  outline: 0.125rem solid var(--border-focused);
  outline-offset: 0.125rem;
}

button {
  border: 0;
  cursor: pointer;
}

svg {
  display: block;
  width: 1rem;
  height: 1rem;
  fill: none;
  stroke: currentColor;
  stroke-linecap: round;
  stroke-linejoin: round;
  stroke-width: 1.75;
}

[hidden] {
  display: none !important;
}

.sr-only {
  position: absolute;
  width: 0.0625rem;
  height: 0.0625rem;
  padding: 0;
  margin: -0.0625rem;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.app-shell {
  height: 100dvh;
  min-height: 100dvh;
  overflow: hidden;
}

.topbar {
  display: flex;
  align-items: center;
  min-height: 4.75rem;
  gap: 1.5rem;
  padding: 0.875rem 1.5rem;
  border-bottom: 0.0625rem solid var(--border);
  background: var(--surface);
}

.brand-lockup {
  display: inline-flex;
  flex: 0 0 auto;
  align-items: center;
  gap: 0.625rem;
  color: var(--brand-ink);
  text-decoration: none;
}

.brand-lockup img {
  width: 7.25rem;
  height: auto;
}

html[data-theme="dark"] .brand-lockup img {
  filter: brightness(0) invert(1);
}

.topbar-message {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  min-width: 0;
  margin-inline: auto;
  color: var(--text-subtle);
}

.topbar-message-copy {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.eyebrow {
  color: var(--text-subtlest);
  font-size: 0.6875rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  line-height: 1rem;
  text-transform: uppercase;
}

.topbar-actions,
.toolbar-group,
.dock-actions,
.url-input-row {
  display: flex;
  align-items: center;
}

.topbar-actions {
  flex: 0 0 auto;
  gap: 0.625rem;
}

.button,
.icon-button,
.toolbar-button,
.text-button {
  transition: background-color var(--duration-fast) ease-out, border-color var(--duration-fast) ease-out, color var(--duration-fast) ease-out, transform var(--duration-fast) ease-out;
}

.button {
  display: inline-flex;
  min-height: 2.25rem;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.5rem 0.875rem;
  border: 0.0625rem solid transparent;
  border-radius: var(--radius-medium);
  font-size: 0.8125rem;
  font-weight: 650;
  line-height: 1rem;
  white-space: nowrap;
}

.button svg {
  width: 0.9375rem;
  height: 0.9375rem;
}

.button-primary {
  background: var(--brand);
  color: #ffffff;
}

.button-primary:hover {
  background: var(--brand-pressed);
}

.button-primary:active,
.button-secondary:active,
.toolbar-button:active,
.icon-button:active {
  transform: translateY(0.0625rem);
}

.button-secondary {
  border-color: var(--border);
  background: var(--surface);
  color: var(--text);
}

.button-secondary:hover,
.button-quiet:hover,
.toolbar-button:hover,
.icon-button:hover {
  background: var(--surface-container);
}

.button-quiet {
  background: transparent;
  color: var(--text-subtle);
}

.icon-button {
  display: inline-grid;
  width: 2.25rem;
  height: 2.25rem;
  place-items: center;
  border: 0.0625rem solid transparent;
  border-radius: var(--radius-medium);
  background: transparent;
  color: var(--text-subtle);
}

.icon-button-small {
  width: 2rem;
  height: 2rem;
}

.theme-icon {
  width: 1.0625rem;
  height: 1.0625rem;
}

.theme-icon-sun {
  display: none;
}

html[data-theme="dark"] .theme-icon-moon {
  display: none;
}

html[data-theme="dark"] .theme-icon-sun {
  display: block;
}

.workspace {
  display: grid;
  grid-template-columns: 16rem minmax(0, 1fr) 20.5rem;
  height: calc(100dvh - 4.75rem);
  min-height: 37rem;
}

.library-sidebar,
.context-dock {
  min-width: 0;
  background: var(--surface);
}

.library-sidebar {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  padding: 1.5rem 1rem 1rem;
  border-inline-end: 0.0625rem solid var(--border);
}

.sidebar-heading,
.outline-heading,
.dock-header,
.context-card-heading,
.endpoint-row,
.how-heading,
.document-kicker,
.reader-header-stats,
.sidebar-footer {
  display: flex;
  align-items: center;
}

.sidebar-heading,
.outline-heading {
  justify-content: space-between;
}

.sidebar-heading h2,
.dock-header h2 {
  margin: 0.125rem 0 0;
  font-size: 1rem;
  font-weight: 650;
  line-height: 1.25rem;
}

.library-count,
.progress-label {
  color: var(--text-subtlest);
  font-family: var(--font-reading);
  font-size: 0.875rem;
  font-variant-numeric: tabular-nums;
}

.source-card {
  display: grid;
  grid-template-columns: 2rem minmax(0, 1fr) 1rem;
  align-items: center;
  gap: 0.625rem;
  width: 100%;
  padding: 0.625rem;
  border: 0.0625rem solid var(--border);
  border-radius: var(--radius-large);
  background: var(--surface);
  text-align: start;
}

.source-card:hover {
  background: var(--surface-container);
}

.source-card.is-active {
  border-color: var(--brand);
  background: var(--brand-soft);
}

.source-card > svg {
  color: var(--text-subtlest);
}

.source-card-mark {
  display: grid;
  width: 2rem;
  height: 2rem;
  place-items: center;
  border-radius: var(--radius-medium);
  background: var(--brand-ink);
  color: #ffffff;
  font-family: var(--font-reading);
  font-size: 1.125rem;
}

.source-card-copy {
  display: grid;
  min-width: 0;
  gap: 0.125rem;
}

.source-card-copy strong,
.source-card-copy small {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.source-card-copy strong {
  font-size: 0.8125rem;
  font-weight: 650;
}

.source-card-copy small,
.field-help {
  color: var(--text-subtlest);
  font-size: 0.6875rem;
}

.sidebar-rule {
  height: 0.0625rem;
  background: var(--border);
}

.outline-heading {
  gap: 0.5rem;
}

.outline {
  display: grid;
  gap: 0.125rem;
  max-height: 19rem;
  overflow: auto;
  margin-inline: -0.375rem;
  padding-inline: 0.375rem;
}

.outline-item {
  display: grid;
  grid-template-columns: 1.75rem minmax(0, 1fr);
  align-items: center;
  gap: 0.5rem;
  min-height: 2.25rem;
  padding: 0.375rem;
  border-radius: var(--radius-medium);
  background: transparent;
  color: var(--text-subtle);
  text-align: start;
}

.outline-item:hover {
  background: var(--surface-container);
}

.outline-item.is-active {
  background: var(--brand-soft);
  color: var(--brand);
}

.outline-number {
  color: var(--text-subtlest);
  font-family: var(--font-reading);
  font-size: 0.8125rem;
  text-align: center;
}

.outline-item.is-active .outline-number {
  color: var(--brand);
}

.outline-title {
  overflow: hidden;
  font-size: 0.75rem;
  font-weight: 600;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.sidebar-spacer {
  flex: 1;
  min-height: 1rem;
}

.url-loader {
  display: grid;
  gap: 0.5rem;
  padding: 0.875rem;
  border: 0.0625rem solid var(--border);
  border-radius: var(--radius-large);
  background: var(--surface-sunken);
}

.url-loader label {
  font-size: 0.75rem;
  font-weight: 650;
}

.url-input-row {
  gap: 0.25rem;
  min-width: 0;
}

.url-input-row input {
  min-width: 0;
  flex: 1;
  height: 2rem;
  padding: 0.375rem 0.5rem;
  border: 0.0625rem solid var(--border-strong);
  border-radius: var(--radius-medium);
  background: var(--surface);
  color: var(--text);
  font-size: 0.75rem;
}

.url-input-row input::placeholder {
  color: var(--text-subtlest);
}

.field-help {
  margin: 0;
  line-height: 1rem;
}

.sidebar-footer {
  flex-wrap: wrap;
  gap: 0.375rem;
  color: var(--text-subtlest);
  font-size: 0.6875rem;
}

.sidebar-footer .text-button {
  margin-inline-start: auto;
}

.status-dot {
  display: inline-block;
  width: 0.4375rem;
  height: 0.4375rem;
  border-radius: var(--radius-full);
  background: var(--text-subtlest);
}

.status-dot-live {
  background: var(--sage);
  box-shadow: 0 0 0 0.1875rem var(--sage-soft);
}

.text-button {
  min-height: 1.75rem;
  padding: 0.25rem 0.375rem;
  border-radius: var(--radius-small);
  background: transparent;
  color: var(--brand);
  font-size: 0.6875rem;
  font-weight: 650;
}

.text-button:hover {
  background: var(--brand-soft);
}

.reader-column {
  display: flex;
  min-width: 0;
  min-height: 0;
  flex-direction: column;
  background: var(--page-canvas);
}

.reader-stage {
  position: relative;
  flex: 1;
  min-width: 0;
  min-height: 0;
}

.reader-stage .reader-viewport {
  height: 100%;
}

.reader-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 1.5rem;
  min-height: 8rem;
  padding: 1.625rem clamp(1.5rem, 4vw, 4rem) 1.25rem;
  background: var(--surface);
  border-bottom: 0.0625rem solid var(--border);
}

.reader-header-copy {
  min-width: 0;
}

.document-kicker {
  flex-wrap: wrap;
  gap: 0.375rem;
  color: var(--text-subtlest);
  font-size: 0.625rem;
  font-weight: 700;
  letter-spacing: 0.075em;
  line-height: 1rem;
}

.document-type-dot {
  width: 0.375rem;
  height: 0.375rem;
  border-radius: var(--radius-full);
  background: var(--teal);
}

.kicker-divider {
  color: var(--border-strong);
}

.reader-header h1 {
  max-width: 42rem;
  margin: 0.375rem 0 0;
  color: var(--brand-ink);
  font-family: var(--font-reading);
  font-size: clamp(1.65rem, 3vw, 2.5rem);
  font-weight: 500;
  letter-spacing: -0.04em;
  line-height: 1.05;
}

html[data-theme="dark"] .reader-header h1 {
  color: var(--brand-ink);
}

.reader-header p {
  max-width: 40rem;
  margin: 0.5rem 0 0;
  color: var(--text-subtle);
  font-size: 0.8125rem;
}

.reader-header-stats {
  flex: 0 0 auto;
  align-items: stretch;
  gap: 1rem;
  padding-block: 0.25rem;
}

.reader-header-stats > div {
  display: grid;
  gap: 0.125rem;
  min-width: 4.25rem;
  align-content: start;
  padding-inline-start: 1rem;
  border-inline-start: 0.0625rem solid var(--border);
}

.stat-label {
  color: var(--text-subtlest);
  font-size: 0.625rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.reader-header-stats strong {
  color: var(--brand-ink);
  font-family: var(--font-reading);
  font-size: 1rem;
  font-weight: 500;
}

.reader-toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  min-height: 3.25rem;
  padding: 0.5rem clamp(1.5rem, 4vw, 4rem);
  border-bottom: 0.0625rem solid var(--border);
  background: var(--surface);
}

.toolbar-group {
  gap: 0.25rem;
  min-width: 0;
}

.toolbar-group-right {
  flex: 0 0 auto;
  gap: 0.375rem;
}

.toolbar-button {
  display: inline-grid;
  width: 2rem;
  height: 2rem;
  place-items: center;
  border-radius: var(--radius-medium);
  background: transparent;
  color: var(--text-subtle);
}

.toolbar-button:disabled {
  cursor: not-allowed;
  opacity: 0.4;
}

.toolbar-button:disabled:hover,
.toolbar-button:disabled:active {
  background: transparent;
  transform: none;
}

.toolbar-button > span {
  font-size: 1.25rem;
  font-weight: 400;
  line-height: 1;
}

.toolbar-location,
.toolbar-label,
.zoom-value {
  overflow: hidden;
  color: var(--text-subtle);
  font-size: 0.75rem;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.toolbar-location {
  max-width: 16rem;
  margin-inline-start: 0.25rem;
  font-weight: 600;
}

.toolbar-label {
  font-variant-numeric: tabular-nums;
}

.zoom-value {
  width: 2.5rem;
  color: var(--text);
  text-align: center;
}

.toolbar-separator {
  width: 0.0625rem;
  height: 1.25rem;
  margin-inline: 0.25rem;
  background: var(--border);
}

.area-button {
  margin-inline-start: 0.375rem;
  padding-inline: 0.625rem;
  border: 0.0625rem solid var(--border);
}

.area-button.is-active {
  border-color: var(--brand);
  background: var(--brand-soft);
  color: var(--brand);
}

.reader-viewport {
  position: relative;
  flex: 1;
  min-height: 0;
  overflow: auto;
  overscroll-behavior: contain;
  scroll-behavior: smooth;
  background-color: var(--page-canvas);
  background-image: linear-gradient(var(--paper-line) 0.0625rem, transparent 0.0625rem), linear-gradient(90deg, var(--paper-line) 0.0625rem, transparent 0.0625rem);
  background-position: center;
  background-size: 1.75rem 1.75rem;
}

.reader-viewport.is-epub-reader {
  overflow-x: hidden;
}

.reader-document {
  display: grid;
  gap: 2rem;
  max-width: 62rem;
  margin: 0 auto;
  padding: 3rem clamp(1.25rem, 5vw, 5rem) 5rem;
}

.document-sheet {
  position: relative;
  max-width: 48rem;
  margin: 0 auto;
  padding: clamp(2rem, 5vw, 4.5rem) clamp(1.5rem, 7vw, 5.5rem);
  border: 0.0625rem solid var(--border);
  border-radius: var(--radius-large);
  background: var(--surface);
  box-shadow: var(--shadow-raised);
}

.document-sheet::before {
  position: absolute;
  inset-block: 2.25rem;
  inset-inline-start: 1.25rem;
  width: 0.125rem;
  border-radius: var(--radius-full);
  background: var(--teal-soft);
  content: "";
}

.document-sheet-header {
  display: grid;
  gap: 0.875rem;
  margin-block-end: 2.75rem;
}

.sheet-kicker {
  color: var(--teal);
  font-size: 0.6875rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.document-sheet h2 {
  max-width: 36rem;
  margin: 0;
  color: var(--brand-ink);
  font-family: var(--font-reading);
  font-size: clamp(1.75rem, 4vw, 3rem);
  font-weight: 500;
  letter-spacing: -0.045em;
  line-height: 1.04;
}

.sheet-dek {
  max-width: 34rem;
  margin: 0;
  color: var(--text-subtle);
  font-family: var(--font-reading);
  font-size: 1.125rem;
  line-height: 1.5;
}

.document-sheet p,
.document-sheet li,
.epub-sheet p,
.url-sheet p {
  max-width: 39rem;
  margin: 1.25rem 0 0;
  color: var(--text);
  font-family: var(--font-reading);
  font-size: 1.0625rem;
  line-height: 1.78;
}

.document-sheet p.lead,
.epub-sheet p.lead,
.url-sheet p.lead {
  margin-block-start: 0;
  color: var(--brand-ink);
  font-size: 1.25rem;
  line-height: 1.6;
}

.document-sheet h3,
.epub-sheet h3,
.url-sheet h3 {
  margin: 2.75rem 0 0;
  color: var(--brand-ink);
  font-family: var(--font-reading);
  font-size: 1.5rem;
  font-weight: 500;
  letter-spacing: -0.025em;
  line-height: 1.2;
}

.document-sheet ul,
.epub-sheet ul,
.url-sheet ul {
  padding-inline-start: 1.5rem;
}

.document-sheet li,
.epub-sheet li,
.url-sheet li {
  margin-block-start: 0.625rem;
}

.margin-note {
  display: grid;
  grid-template-columns: 1rem minmax(0, 1fr);
  gap: 0.625rem;
  margin-block: 2rem;
  padding: 0.875rem 1rem;
  border: 0.0625rem solid var(--border);
  border-radius: var(--radius-large);
  background: var(--sun-soft);
}

.margin-note svg {
  margin-block-start: 0.125rem;
  color: var(--sun);
}

.margin-note strong,
.margin-note p {
  margin: 0;
  font-family: var(--font-ui);
  font-size: 0.8125rem;
  line-height: 1.45;
}

.margin-note strong {
  display: block;
  margin-block-end: 0.25rem;
  color: var(--brand-ink);
}

.concept-figure {
  margin: 2.5rem 0 0;
  padding: 1.25rem;
  border: 0.0625rem solid var(--border);
  border-radius: var(--radius-large);
  background: var(--surface-sunken);
}

.concept-figure figcaption {
  margin-block-start: 1rem;
  color: var(--text-subtle);
  font-size: 0.75rem;
  line-height: 1.35;
}

.concept-figure figcaption strong {
  display: block;
  margin-block-end: 0.25rem;
  color: var(--text);
  font-weight: 650;
}

.model-map {
  position: relative;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0.75rem;
  min-height: 7.5rem;
  align-items: center;
}

.model-map::before,
.model-map::after {
  position: absolute;
  top: 50%;
  width: 2rem;
  border-top: 0.0625rem dashed var(--border-strong);
  content: "";
}

.model-map::before {
  inset-inline-start: calc(33.333% - 1rem);
}

.model-map::after {
  inset-inline-start: calc(66.666% - 1rem);
}

.model-node {
  position: relative;
  z-index: 1;
  display: grid;
  min-height: 5.25rem;
  align-content: center;
  gap: 0.25rem;
  padding: 0.75rem;
  border: 0.0625rem solid var(--border);
  border-radius: var(--radius-large);
  background: var(--surface);
  text-align: center;
}

.model-node span {
  color: var(--text-subtlest);
  font-size: 0.625rem;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.model-node strong {
  color: var(--brand-ink);
  font-family: var(--font-reading);
  font-size: 1rem;
  font-weight: 500;
}

.model-node[data-tone="blue"] {
  border-block-start: 0.1875rem solid var(--teal);
}

.model-node[data-tone="yellow"] {
  border-block-start: 0.1875rem solid var(--sun);
}

.model-node[data-tone="coral"] {
  border-block-start: 0.1875rem solid var(--coral);
}

.try-card {
  display: grid;
  gap: 0.25rem;
  margin-block-start: 2.25rem;
  padding: 1rem;
  border-inline-start: 0.1875rem solid var(--sage);
  background: var(--sage-soft);
}

.try-card strong {
  color: var(--sage);
  font-size: 0.75rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.try-card span {
  color: var(--text);
  font-family: var(--font-reading);
  font-size: 0.9375rem;
  line-height: 1.5;
}

.document-sheet-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  margin-block-start: 3.5rem;
  padding-block-start: 1rem;
  border-block-start: 0.0625rem solid var(--border);
  color: var(--text-subtlest);
  font-size: 0.6875rem;
}

.document-sheet-footer strong {
  color: var(--brand);
  font-weight: 650;
}

.epub-sheet,
.url-sheet,
.text-sheet {
  padding: clamp(1.75rem, 5vw, 4rem) clamp(1.5rem, 7vw, 5rem);
}

.epub-sheet h2,
.url-sheet h2,
.text-sheet h2 {
  font-size: clamp(1.625rem, 4vw, 2.5rem);
}

.epub-sheet img,
.url-sheet img {
  max-width: 100%;
  height: auto;
}

.pdf-page {
  position: relative;
  width: fit-content;
  max-width: 100%;
  margin: 0 auto;
  border: 0.0625rem solid var(--border);
  border-radius: var(--radius-small);
  background: var(--surface);
  box-shadow: var(--shadow-raised);
  isolation: isolate;
}

.pdf-page canvas {
  display: block;
  max-width: 100%;
  height: auto;
}

.pdf-text-layer {
  --min-font-size: 1;
  --text-scale-factor: calc(var(--total-scale-factor) * var(--min-font-size));
  --min-font-size-inv: calc(1 / var(--min-font-size));
  position: absolute;
  inset: 0;
  overflow: hidden;
  z-index: 2;
  line-height: 1;
  opacity: 1;
  text-align: initial;
  text-size-adjust: none;
  forced-color-adjust: none;
  transform-origin: 0 0;
  caret-color: CanvasText;
  user-select: text;
}

.pdf-text-layer span,
.pdf-text-layer br {
  position: absolute;
  color: transparent;
  cursor: text;
  white-space: pre;
  transform-origin: 0% 0%;
  transform: rotate(var(--rotate, 0deg)) scaleX(var(--scale-x, 1));
}

.pdf-text-layer span.markedContent {
  top: 0;
  height: 0;
}

.pdf-text-layer > :not(.markedContent),
.pdf-text-layer .markedContent span:not(.markedContent) {
  z-index: 1;
  --font-height: 0;
  font-size: calc(var(--text-scale-factor) * var(--font-height));
  --scale-x: 1;
  --rotate: 0deg;
  transform: rotate(var(--rotate)) scaleX(var(--scale-x)) scale(var(--min-font-size-inv));
}

.pdf-text-layer .endOfContent {
  position: absolute;
  inset: 100% 0 0;
  z-index: -1;
  display: block;
  cursor: default;
  user-select: none;
}

.pdf-text-layer ::selection {
  background: #8fb8f6aa;
  color: transparent;
}

.document-sheet ::selection,
.epub-sheet ::selection,
.url-sheet ::selection,
.text-sheet ::selection {
  background: #8fb8f6aa;
  color: var(--brand-ink);
}

.pdf-page-label {
  position: absolute;
  inset-block-end: -1.5rem;
  inset-inline-end: 0;
  color: var(--text-subtlest);
  font-size: 0.6875rem;
}

.loading-sheet {
  display: grid;
  min-height: 20rem;
  place-items: center;
  border: 0.0625rem dashed var(--border-strong);
  border-radius: var(--radius-large);
  color: var(--text-subtle);
}

.capture-layer {
  position: absolute;
  z-index: 5;
  inset: 0;
  display: none;
  overflow: hidden;
  background: #102b4d12;
  cursor: crosshair;
  touch-action: none;
}

.reader-stage.is-capturing .capture-layer {
  display: block;
}

.area-selection-layer {
  position: absolute;
  z-index: 4;
  inset: 0;
  overflow: hidden;
  pointer-events: none;
}

.capture-instruction {
  position: sticky;
  z-index: 2;
  inset-block-start: 1rem;
  display: flex;
  width: fit-content;
  align-items: center;
  gap: 0.5rem;
  margin: 1rem auto;
  padding: 0.5rem 0.75rem;
  border: 0.0625rem solid var(--brand);
  border-radius: var(--radius-full);
  background: var(--surface-overlay);
  box-shadow: var(--shadow-overlay);
  color: var(--brand-ink);
  font-size: 0.75rem;
  font-weight: 650;
  pointer-events: none;
}

.capture-cursor-icon {
  display: inline-grid;
  width: 1rem;
  height: 1rem;
  place-items: center;
  border: 0.0625rem solid var(--brand);
  border-radius: var(--radius-small);
  color: var(--brand);
  font-size: 0.875rem;
  line-height: 1;
}

kbd {
  display: inline-flex;
  min-width: 1.25rem;
  min-height: 1.25rem;
  align-items: center;
  justify-content: center;
  padding: 0.125rem 0.3125rem;
  border: 0.0625rem solid var(--border);
  border-bottom-color: var(--border-strong);
  border-radius: var(--radius-small);
  background: var(--surface-sunken);
  color: var(--text-subtlest);
  font-family: var(--font-ui);
  font-size: 0.625rem;
  font-weight: 650;
  line-height: 1;
}

.area-box {
  position: absolute;
  display: none;
  border: 0.125rem solid var(--brand);
  border-radius: var(--radius-small);
  background: #e9f2fe2e;
  box-shadow: 0 0 0 0.125rem #ffffffaa;
  pointer-events: none;
}

.area-box.is-visible {
  display: block;
}

.area-box-label {
  position: absolute;
  inset-block-start: -1.75rem;
  inset-inline-start: -0.125rem;
  padding: 0.25rem 0.5rem;
  border-radius: var(--radius-small);
  background: var(--brand);
  color: #ffffff;
  font-size: 0.625rem;
  font-weight: 650;
  white-space: nowrap;
}

.context-dock {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  padding: 1.5rem 1rem 1rem;
  border-inline-start: 0.0625rem solid var(--border);
}

.dock-header {
  align-items: flex-start;
  justify-content: space-between;
  gap: 0.75rem;
}

.dock-header h2 {
  max-width: 10rem;
  margin-top: 0.25rem;
  font-family: var(--font-reading);
  font-size: 1.25rem;
  font-weight: 500;
  letter-spacing: -0.025em;
  line-height: 1.1;
}

.mcp-live-badge {
  display: inline-flex;
  flex: 0 0 auto;
  align-items: center;
  gap: 0.375rem;
  padding: 0.3125rem 0.5rem;
  border: 0.0625rem solid var(--sage);
  border-radius: var(--radius-full);
  background: var(--sage-soft);
  color: var(--sage);
  font-size: 0.625rem;
  font-weight: 700;
  white-space: nowrap;
}

.endpoint-row {
  gap: 0.375rem;
  min-width: 0;
  padding-block: 0.625rem;
  border-block: 0.0625rem solid var(--border);
}

.endpoint-label {
  flex: 0 0 auto;
  color: var(--text-subtlest);
  font-size: 0.6875rem;
}

.endpoint-row code {
  min-width: 0;
  overflow: hidden;
  margin-inline-start: auto;
  color: var(--brand);
  font-family: ui-monospace, SFMono-Regular, Consolas, monospace;
  font-size: 0.6875rem;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.context-card {
  display: grid;
  gap: 1rem;
  min-height: 14rem;
  padding: 1rem;
  border: 0.0625rem solid var(--border);
  border-radius: var(--radius-large);
  background: var(--surface);
  box-shadow: var(--shadow-raised);
}

.context-card-heading {
  justify-content: space-between;
  gap: 0.5rem;
}

.context-kind {
  max-width: 8rem;
  overflow: hidden;
  color: var(--text-subtlest);
  font-size: 0.625rem;
  text-align: end;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.context-empty {
  display: grid;
  align-content: center;
  justify-items: center;
  gap: 0.625rem;
  padding: 0.75rem 0.25rem;
  text-align: center;
}

.empty-orbit {
  position: relative;
  width: 3rem;
  height: 3rem;
  margin-block-end: 0.25rem;
  border: 0.0625rem solid var(--border);
  border-radius: var(--radius-full);
}

.empty-orbit::before,
.empty-orbit::after,
.empty-orbit span {
  position: absolute;
  display: block;
  width: 0.5rem;
  height: 0.5rem;
  border-radius: var(--radius-full);
  content: "";
}

.empty-orbit::before {
  inset-block-start: 0.35rem;
  inset-inline-start: 1.2rem;
  background: var(--teal);
}

.empty-orbit::after {
  inset-block-end: 0.35rem;
  inset-inline-end: 0.6rem;
  background: var(--coral);
}

.empty-orbit span:nth-child(1) {
  inset-block-end: 0.35rem;
  inset-inline-start: 0.6rem;
  background: var(--sun);
}

.empty-orbit span:nth-child(2) {
  inset-block-start: 1.25rem;
  inset-inline-end: 0.35rem;
  background: var(--sage);
}

.empty-orbit span:nth-child(3) {
  inset-block-start: 1.25rem;
  inset-inline-start: 1.25rem;
  width: 0.375rem;
  height: 0.375rem;
  background: var(--brand);
}

.context-empty strong {
  color: var(--brand-ink);
  font-family: var(--font-reading);
  font-size: 1rem;
  font-weight: 500;
}

.context-empty p {
  max-width: 14rem;
  margin: 0;
  color: var(--text-subtle);
  font-size: 0.75rem;
  line-height: 1.5;
}

.context-live {
  display: grid;
  gap: 0.75rem;
}

.context-live blockquote {
  margin: 0;
  padding-inline-start: 0.75rem;
  border-inline-start: 0.1875rem solid var(--teal);
  color: var(--brand-ink);
  font-family: var(--font-reading);
  font-size: 1rem;
  line-height: 1.5;
}

.context-location {
  color: var(--brand);
  font-size: 0.6875rem;
  font-weight: 650;
}

.context-excerpt {
  display: -webkit-box;
  overflow: hidden;
  color: var(--text-subtle);
  font-family: var(--font-reading);
  font-size: 0.8125rem;
  line-height: 1.55;
  -webkit-box-orient: vertical;
  -webkit-line-clamp: 5;
}

.context-visual {
  padding: 0.5rem 0.625rem;
  border: 0.0625rem solid var(--border);
  border-radius: var(--radius-medium);
  background: var(--teal-soft);
  color: var(--teal);
  font-size: 0.6875rem;
  font-weight: 650;
  line-height: 1.35;
}

.how-it-works {
  display: grid;
  gap: 0.875rem;
}

.how-heading {
  gap: 0.625rem;
}

.loop-line {
  height: 0.0625rem;
  flex: 1;
  background: var(--border);
}

.how-it-works ol {
  display: grid;
  gap: 0.625rem;
  padding: 0;
  margin: 0;
  list-style: none;
}

.how-it-works li {
  display: grid;
  grid-template-columns: 1.5rem minmax(0, 1fr);
  align-items: start;
  gap: 0.5rem;
}

.how-it-works li > span {
  color: var(--teal);
  font-family: var(--font-reading);
  font-size: 0.8125rem;
}

.how-it-works p {
  margin: 0;
  color: var(--text-subtlest);
  font-size: 0.75rem;
  line-height: 1.35;
}

.how-it-works strong {
  color: var(--text);
  font-weight: 650;
}

.dock-actions {
  gap: 0.5rem;
  margin-top: auto;
}

.dock-actions .button-secondary {
  flex: 1;
}

.drop-overlay {
  position: fixed;
  z-index: 20;
  inset: 0;
  display: grid;
  place-items: center;
  padding: 1.5rem;
  background: #102b4d75;
}

.drop-panel {
  display: grid;
  justify-items: center;
  gap: 0.5rem;
  padding: 2rem 3rem;
  border: 0.125rem dashed var(--brand);
  border-radius: var(--radius-xlarge);
  background: var(--surface-overlay);
  box-shadow: var(--shadow-overlay);
  text-align: center;
}

.drop-panel-mark {
  display: grid;
  width: 2.5rem;
  height: 2.5rem;
  place-items: center;
  border-radius: var(--radius-full);
  background: var(--brand-soft);
  color: var(--brand);
  font-size: 1.5rem;
}

.drop-panel strong {
  color: var(--brand-ink);
  font-family: var(--font-reading);
  font-size: 1.25rem;
  font-weight: 500;
}

.drop-panel span:last-child {
  color: var(--text-subtle);
  font-size: 0.75rem;
}

.toast {
  position: fixed;
  z-index: 30;
  inset-block-end: 1rem;
  inset-inline-start: 50%;
  max-width: min(28rem, calc(100vw - 2rem));
  padding: 0.625rem 0.875rem;
  border: 0.0625rem solid var(--toast-border);
  border-radius: var(--radius-full);
  background: var(--toast-background);
  box-shadow: var(--shadow-overlay);
  color: var(--toast-text);
  font-size: 0.75rem;
  font-weight: 600;
  line-height: 1.35;
  text-align: center;
  opacity: 0;
  pointer-events: none;
  transform: translate(-50%, 0.5rem);
  transition: opacity var(--duration-medium) ease-out, transform var(--duration-medium) ease-out;
}

.toast.is-visible {
  opacity: 1;
  transform: translate(-50%, 0);
}

.shortcut-dialog {
  position: fixed;
  z-index: 25;
  inset: 0;
  display: grid;
  place-items: center;
  padding: 1rem;
}

.dialog-backdrop {
  position: absolute;
  inset: 0;
  background: #102b4d75;
}

.dialog-card {
  position: relative;
  z-index: 1;
  display: grid;
  width: min(24rem, 100%);
  gap: 0.875rem;
  padding: 1.5rem;
  border: 0.0625rem solid var(--border);
  border-radius: var(--radius-xlarge);
  background: var(--surface-overlay);
  box-shadow: var(--shadow-overlay);
}

.dialog-card h2 {
  margin: 0;
  color: var(--brand-ink);
  font-family: var(--font-reading);
  font-size: 1.75rem;
  font-weight: 500;
  letter-spacing: -0.04em;
}

.dialog-close {
  position: absolute;
  inset-block-start: 0.75rem;
  inset-inline-end: 0.75rem;
  font-size: 1.25rem;
}

.shortcut-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding-block: 0.5rem;
  border-top: 0.0625rem solid var(--border);
  color: var(--text-subtle);
  font-size: 0.75rem;
}

@media (max-width: 78rem) {
  .workspace {
    grid-template-columns: 14rem minmax(0, 1fr) 18rem;
  }

  .topbar-message {
    display: none;
  }
}

@media (max-width: 64rem) {
  .workspace {
    grid-template-columns: 13rem minmax(0, 1fr);
  }

  .context-dock {
    position: fixed;
    z-index: 10;
    inset-block-end: 0;
    inset-inline: 13rem 0;
    display: grid;
    grid-template-columns: minmax(0, 1fr) minmax(12rem, 0.8fr);
    gap: 0.75rem 1rem;
    max-height: 15rem;
    overflow: auto;
    padding: 1rem 1.5rem;
    border-top: 0.0625rem solid var(--border);
    border-inline-start: 0;
    box-shadow: var(--shadow-overlay);
  }

  .context-dock .dock-header,
  .context-dock .endpoint-row {
    grid-column: 1 / -1;
  }

  .context-dock .dock-header {
    align-items: center;
  }

  .context-dock .dock-header h2 {
    max-width: none;
  }

  .context-card {
    min-height: 8rem;
  }

  .context-empty {
    padding: 0;
  }

  .empty-orbit {
    display: none;
  }

  .how-it-works {
    align-content: center;
  }

  .how-it-works ol {
    grid-template-columns: repeat(3, 1fr);
  }

  .dock-actions {
    grid-column: 1 / -1;
  }

}

@media (max-width: 48rem) {
  .topbar {
    min-height: 4.25rem;
    padding-inline: 1rem;
  }

  .brand-lockup img {
    width: 6.75rem;
  }

  .topbar-actions {
    margin-inline-start: auto;
  }

  .topbar-actions .button-primary {
    padding-inline: 0.625rem;
  }

  .topbar-actions .button-primary svg {
    display: none;
  }

  .workspace {
    grid-template-columns: 1fr;
    height: auto;
    min-height: calc(100dvh - 4.25rem);
  }

  .library-sidebar {
    display: none;
  }

  .reader-column {
    min-height: calc(100dvh - 4.25rem);
  }

  .context-dock {
    inset-inline: 0;
  }

  .reader-header {
    min-height: 7.5rem;
    padding-inline: 1rem;
  }

  .reader-header-stats {
    display: none;
  }

  .reader-toolbar {
    padding-inline: 1rem;
  }

  .toolbar-location {
    max-width: 10rem;
  }

  .toolbar-group-right .toolbar-label,
  .toolbar-group-right .toolbar-separator {
    display: none;
  }

  .area-button {
    width: 2.25rem;
    padding: 0;
  }

  .area-button svg {
    width: 1.0625rem;
    height: 1.0625rem;
  }

  .area-button {
    font-size: 0;
  }

  .reader-document {
    padding: 1.5rem 0.75rem 8rem;
  }

  .document-sheet {
    padding-inline: 1.5rem 1.25rem;
  }

  .document-sheet::before {
    inset-inline-start: 0.625rem;
  }

  .model-map {
    gap: 0.375rem;
  }

  .model-map::before,
  .model-map::after {
    width: 0.75rem;
  }

  .model-node {
    min-height: 4.75rem;
    padding-inline: 0.25rem;
  }

  .model-node strong {
    font-size: 0.875rem;
  }

  .context-dock {
    grid-template-columns: 1fr;
    max-height: 17rem;
  }

  .context-dock .context-card,
  .context-dock .how-it-works,
  .context-dock .dock-actions {
    grid-column: 1;
  }

  .how-it-works ol {
    grid-template-columns: repeat(3, 1fr);
  }

  .how-it-works li {
    grid-template-columns: 1fr;
    gap: 0.125rem;
  }
}

.account-menu {
  position: relative;
  flex: 0 0 auto;
}

.account-button {
  display: inline-flex;
  min-height: 2.25rem;
  align-items: center;
  gap: 0.45rem;
  padding: 0.25rem 0.55rem 0.25rem 0.3rem;
  border: 0.0625rem solid var(--border);
  border-radius: var(--radius-full);
  background: var(--surface);
  color: var(--text);
  font-size: 0.8125rem;
  font-weight: 650;
  white-space: nowrap;
}

.account-button:hover,
.account-button[aria-expanded="true"] {
  border-color: var(--border-strong);
  background: var(--surface-container);
}

.account-initial {
  display: grid;
  width: 1.75rem;
  height: 1.75rem;
  place-items: center;
  border-radius: 50%;
  background: var(--brand-soft);
  color: var(--brand-ink);
  font-size: 0.75rem;
  font-weight: 750;
  line-height: 1;
}

.account-menu-panel {
  position: absolute;
  z-index: 30;
  inset-block-start: calc(100% + 0.55rem);
  inset-inline-end: 0;
  display: grid;
  width: min(25rem, calc(100vw - 2rem));
  max-height: min(80dvh, 42rem);
  gap: 0.85rem;
  overflow: auto;
  padding: 1rem;
  border: 0.0625rem solid var(--border-strong);
  border-radius: var(--radius-large);
  background: var(--surface-overlay);
  box-shadow: var(--shadow-overlay);
}

.account-menu-heading {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 1rem;
}

.account-menu-heading > div {
  display: grid;
  gap: 0.15rem;
}

.account-menu-message {
  margin: 0;
  color: var(--text-subtle);
  font-size: 0.8125rem;
}

.account-status-warning {
  color: var(--sun);
}

.tutor-status-dot.is-warning {
  color: var(--sun);
}

.account-signed-in,
.account-signed-out {
  display: grid;
  gap: 0.75rem;
}

.account-identity {
  display: grid;
  gap: 0.2rem;
}

.account-actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem;
}

.account-auth-form {
  display: grid;
  gap: 0.15rem;
}

.account-auth-switch {
  justify-self: start;
  padding: 0;
}

/* Reader-first shell: keep the book in the foreground and disclose controls on demand. */
.topbar {
  position: relative;
  z-index: 30;
  min-height: 4rem;
  padding: 0.5rem clamp(1rem, 3vw, 2.5rem);
}

.brand-lockup img {
  width: 8.75rem;
}

.topbar-actions {
  gap: 0.25rem;
  margin-inline-start: auto;
}

.topbar-document {
  display: flex;
  min-width: 0;
  flex: 1 1 auto;
  align-items: center;
}

.topbar-document .reader-header-copy {
  display: block;
  width: 100%;
  min-width: 0;
}

.topbar-document .document-kicker,
.topbar-document .reader-header-copy > p {
  display: none;
}

.topbar-document #reader-title {
  display: -webkit-box;
  max-width: 100%;
  min-width: 0;
  margin: 0;
  overflow: hidden;
  color: var(--brand-ink);
  font-family: var(--font-reading);
  font-size: clamp(1rem, 1.35vw, 1.5rem);
  font-weight: 500;
  letter-spacing: -0.035em;
  line-height: 1.1;
  -webkit-box-orient: vertical;
  -webkit-line-clamp: 2;
  overflow-wrap: anywhere;
  white-space: normal;
}

.contents-button {
  gap: 0.4rem;
  padding-inline: 0.625rem;
}

.contents-button svg {
  width: 0.9375rem;
  height: 0.9375rem;
}

.workspace {
  position: relative;
  display: block;
  height: calc(100dvh - 4rem);
  min-height: 0;
}

.library-sidebar {
  position: fixed;
  z-index: 16;
  inset-block: 4rem 0;
  inset-inline-start: 0;
  display: flex;
  width: min(22rem, calc(100vw - 1.5rem));
  padding: 1.25rem;
  border-inline-end: 0.0625rem solid var(--border);
  box-shadow: var(--shadow-overlay);
  pointer-events: none;
  transform: translateX(-105%);
  transition: transform var(--duration-medium) ease-out, visibility var(--duration-medium) ease-out;
  visibility: hidden;
}

.library-sidebar.is-open {
  pointer-events: auto;
  transform: translateX(0);
  visibility: visible;
}

.drawer-heading {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 1rem;
}

.drawer-heading h2 {
  margin: 0.125rem 0 0;
  color: var(--brand-ink);
  font-family: var(--font-reading);
  font-size: 1.5rem;
  font-weight: 500;
  letter-spacing: -0.035em;
  line-height: 1.1;
}

.drawer-scrim {
  position: fixed;
  z-index: 15;
  inset: 0;
  background: #102b4d66;
}

.reader-column {
  height: 100%;
  min-height: 0;
}

.reader-header {
  min-height: 3.5rem;
  align-items: center;
  gap: 0;
  padding-block: 0.375rem;
}

.reader-header-copy {
  display: none;
  min-width: 0;
  flex: 1 1 auto;
  align-items: baseline;
  gap: 0.75rem;
}

.reader-header-copy .document-kicker {
  display: none;
}

.reader-header h1 {
  display: none;
}

.reader-header p,
.reader-header-stats {
  display: none;
}

.reader-toolbar {
  position: relative;
  z-index: 4;
  display: flex;
  min-height: 0;
  flex: 0 0 auto;
  align-items: center;
  justify-content: flex-end;
  gap: 0.75rem;
  padding: 0;
  border: 0;
  background: transparent;
}

.reader-header > .reader-toolbar {
  width: 100%;
  flex: 1 1 auto;
  justify-content: space-between;
}

.reader-toolbar > .toolbar-group:first-child {
  flex: 0 0 clamp(13rem, 23vw, 18rem);
}

.reader-toolbar .toolbar-location {
  width: auto;
  max-width: none;
  flex: 1 1 auto;
  min-width: 0;
}

.toolbar-location {
  max-width: min(30rem, 45vw);
}

.reader-viewport {
  background-image: none;
}

.reader-document {
  width: 100%;
  max-width: none;
  gap: 1.25rem;
  padding-block: 0.5rem 3rem;
}

.document-sheet {
  width: min(100%, 64rem);
  max-width: 64rem;
  padding: clamp(2.5rem, 6vw, 5.5rem) clamp(2rem, 8vw, 8rem);
  border: 0;
  border-radius: 0;
  box-shadow: none;
}

.document-sheet::before {
  display: none;
}

.document-sheet-header {
  margin-block-end: 3.25rem;
}

.document-sheet p,
.document-sheet li,
.epub-sheet p,
.url-sheet p {
  max-width: 48rem;
}

.epub-sheet,
.url-sheet,
.text-sheet {
  padding: clamp(2.5rem, 6vw, 5.5rem) clamp(2rem, 8vw, 8rem);
}

.epub-sheet img {
  display: block;
  width: auto;
  max-width: 100%;
  max-height: 70rem;
  margin: 2.5rem auto 0;
  object-fit: contain;
}

.epub-figure {
  max-width: 52rem;
  margin: 2.75rem auto 0;
  text-align: center;
}

.epub-figure img {
  margin: 0 auto;
}

.epub-figure figcaption {
  max-width: 42rem;
  margin: 0.875rem auto 0;
  color: var(--text-subtle);
  font-family: var(--font-reading);
  font-size: 0.875rem;
  line-height: 1.5;
  text-align: start;
}

.epub-figure figcaption:empty {
  display: none;
}

.source-dialog {
  position: fixed;
  z-index: 25;
  inset: 0;
  display: grid;
  place-items: center;
  padding: 1rem;
}

.source-dialog-card {
  width: min(34rem, 100%);
  gap: 1rem;
}

.source-dialog-card h2 {
  max-width: 22rem;
  margin: 0;
  color: var(--brand-ink);
  font-family: var(--font-reading);
  font-size: 1.875rem;
  font-weight: 500;
  letter-spacing: -0.04em;
  line-height: 1.08;
}

.dialog-intro {
  margin: -0.375rem 0 0;
  color: var(--text-subtle);
  font-size: 0.8125rem;
}

.source-options {
  display: grid;
  gap: 0.75rem;
  margin-block-start: 0.375rem;
}

.source-option {
  display: grid;
  grid-template-columns: 2rem minmax(0, 1fr) 1rem;
  align-items: center;
  gap: 0.75rem;
  width: 100%;
  padding: 0.75rem;
  border: 0.0625rem solid var(--border);
  border-radius: var(--radius-medium);
  background: var(--surface);
  text-align: start;
}

.source-option:hover {
  border-color: var(--brand);
  background: var(--brand-soft);
}

.source-option-icon {
  display: grid;
  width: 2rem;
  height: 2rem;
  place-items: center;
  border-radius: var(--radius-medium);
  background: var(--brand-soft);
  color: var(--brand);
}

.source-option-icon svg {
  width: 1.125rem;
  height: 1.125rem;
}

.source-option strong,
.source-option small {
  display: block;
}

.source-option strong {
  font-size: 0.8125rem;
  font-weight: 650;
}

.source-option small {
  margin-block-start: 0.125rem;
  color: var(--text-subtlest);
  font-size: 0.6875rem;
}

.source-option-arrow {
  color: var(--text-subtlest);
}

.source-dialog .url-loader {
  padding: 1rem;
  border-radius: var(--radius-medium);
}

/* Document engines keep the chrome quiet while preserving the source's own layout. */
.reader-document.is-epub-reader {
  display: block;
  width: 100%;
  height: 100%;
  min-width: 0;
  max-width: none;
  min-height: 0;
  margin: 0;
  gap: 0;
  padding: 0;
  overflow: hidden;
}

.reader-viewport.is-epub-reader {
  overflow: hidden;
  background: var(--surface);
}

.epub-renderer {
  width: 100%;
  height: 100%;
  min-width: 0;
  max-width: 100%;
  min-height: 0;
  margin: 0;
  overflow-x: visible;
}

.epub-renderer .epub-container {
  width: 100% !important;
  height: 100% !important;
  max-width: 100% !important;
  overflow-x: hidden !important;
  overflow-y: auto !important;
}

.epub-renderer iframe {
  display: block;
  width: 100%;
  min-width: 0;
  max-width: 100%;
  min-height: 42rem;
  border: 0;
  background: var(--surface);
}

.reader-document.is-word-reader {
  max-width: none;
  gap: 0;
  padding-inline: clamp(0.5rem, 3vw, 2.5rem);
}

.word-document {
  width: 100%;
}

.word-document .docx-wrapper {
  display: flex;
  align-items: center;
  padding: 2rem 0 4rem;
  background: transparent !important;
}

.word-document .docx-wrapper > section.docx {
  width: min(100%, 8.5in) !important;
  max-width: 100%;
  min-height: 11in;
  margin: 0 auto 1.5rem;
  overflow: hidden;
  background: #fff !important;
  color: #161a1d !important;
  box-shadow: var(--shadow-raised);
}

.word-document .docx-wrapper > section.docx img {
  max-width: 100%;
  height: auto;
}

.word-document .docx-wrapper > section.docx ::selection {
  background: #8fb8f6aa;
  color: #102b4d;
}

@media (max-width: 48rem) {
  .topbar {
    min-height: 3.75rem;
    gap: 0.5rem;
  }

  .brand-lockup img {
    width: 7.75rem;
  }

  .workspace {
    height: calc(100dvh - 3.75rem);
  }

  .library-sidebar {
    inset-block-start: 3.75rem;
  }

  .contents-button span {
    display: none;
  }

  .contents-button {
    width: 2.25rem;
    padding: 0;
  }

  .topbar-actions .button-primary {
    padding-inline: 0.625rem;
  }

  .topbar-actions .button-primary svg {
    display: block;
  }

  .account-button {
    width: 2.25rem;
    height: 2.25rem;
    justify-content: center;
    padding: 0.2rem;
  }

  .account-name {
    display: none;
  }

  .account-menu-panel {
    inset-inline-end: -0.35rem;
    width: min(24rem, calc(100vw - 1.25rem));
  }

  .reader-header {
    min-height: 3.5rem;
    gap: 0.5rem;
    padding-inline: 1rem;
  }

  .topbar-document #reader-title {
    font-size: 1rem;
  }

  .reader-toolbar {
    gap: 0.25rem;
    padding: 0;
  }

  .reader-toolbar > .toolbar-group:first-child {
    flex-basis: 11rem;
  }

  .reader-toolbar .toolbar-location {
    max-width: none;
  }

  .toolbar-group-right .toolbar-label,
  .toolbar-group-right .toolbar-separator {
    display: none;
  }

  .area-button {
    width: 2.25rem;
    padding: 0;
    font-size: 0;
  }

  .reader-document {
    padding: 1rem 0.5rem 3rem;
  }

  .reader-document.is-epub-reader {
    padding: 0;
  }

  .epub-renderer iframe {
    min-height: 36rem;
  }

  .reader-document.is-word-reader {
    padding-inline: 0.25rem;
  }

  .reader-header .toolbar-group {
    gap: 0.125rem;
  }

  .word-document .docx-wrapper {
    padding: 1rem 0 3rem;
  }

  .word-document .docx-wrapper > section.docx {
    min-height: 0;
    margin-bottom: 1rem;
  }

  .document-sheet,
  .epub-sheet,
  .url-sheet,
  .text-sheet {
    padding: 2rem 1.25rem 3rem;
  }

  .document-sheet-header {
    margin-block-end: 2rem;
  }

  .document-sheet p,
  .document-sheet li,
  .epub-sheet p,
  .url-sheet p {
    font-size: 1rem;
    line-height: 1.7;
  }

}

@media (max-width: 30rem) {
  .reader-header {
    gap: 0.25rem;
  }

  .topbar-document #reader-title {
    font-size: 1rem;
  }

  .reader-toolbar .toolbar-location {
    display: none;
  }

  .reader-toolbar > .toolbar-group:first-child {
    flex-basis: 4.25rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    transition-duration: 0ms !important;
  }
}

/* Tutor drawer: an optional teaching surface that overlays the full-width reader. */
.tutor-toggle-button {
  gap: 0.4rem;
  padding-inline: 0.625rem;
}

.tutor-toggle-button svg {
  width: 0.9375rem;
  height: 0.9375rem;
}

.tutor-toggle-button[aria-expanded="true"] {
  background: var(--brand-soft);
  color: var(--brand);
}

.tutor-panel-scrim {
  display: none;
}

.tutor-panel {
  position: fixed;
  z-index: 17;
  inset-block: 4rem 0;
  inset-inline-end: 0;
  display: flex;
  width: min(27rem, calc(100vw - 1rem));
  min-width: 0;
  flex-direction: column;
  border-inline-start: 0.0625rem solid var(--border);
  background: var(--surface);
  box-shadow: var(--shadow-overlay);
  pointer-events: none;
  transform: translateX(105%);
  transition: transform var(--duration-medium) ease-out, visibility var(--duration-medium) ease-out;
  visibility: hidden;
}

.tutor-panel.is-open {
  pointer-events: auto;
  transform: translateX(0);
  visibility: visible;
}

.tutor-panel-scroll {
  min-height: 0;
  flex: 1 1 auto;
  overflow-y: auto;
  overflow-x: hidden;
  overscroll-behavior: contain;
  padding: 0 1.25rem 1.5rem;
}

.tutor-section {
  padding-block: 1rem;
  border-block-end: 0.0625rem solid var(--border);
}

.tutor-section:last-child {
  border-block-end: 0;
}

.tutor-section-heading,
.visualization-card-heading {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
}

.tutor-section-heading .eyebrow {
  margin: 0;
}

.tutor-status-dot,
.tutor-focus-kind,
.visualization-status {
  color: var(--text-subtlest);
  font-size: 0.6875rem;
  font-weight: 650;
}

.tutor-status-dot {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  color: var(--sage);
}

.tutor-status-dot::before {
  width: 0.4rem;
  height: 0.4rem;
  border-radius: var(--radius-full);
  background: currentColor;
  content: "";
}

.segmented-control {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.125rem;
  margin-block-start: 0.625rem;
  padding: 0.125rem;
  border: 0.0625rem solid var(--border);
  border-radius: var(--radius-medium);
  background: var(--surface-sunken);
}

.segmented-control button {
  min-height: 2rem;
  border-radius: var(--radius-small);
  background: transparent;
  color: var(--text-subtle);
  font-size: 0.75rem;
  font-weight: 650;
}

.segmented-control button:hover {
  background: var(--surface-container);
}

.segmented-control button.is-selected {
  background: var(--surface);
  box-shadow: var(--shadow-raised);
  color: var(--brand);
}

.tutor-help {
  margin: 0.625rem 0 0;
  color: var(--text-subtle);
  font-size: 0.75rem;
  line-height: 1.5;
}

.analysis-card-heading {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 0.75rem;
}

.analysis-card-heading h3 {
  margin: 0.25rem 0 0;
  color: var(--brand-ink);
  font-family: var(--font-reading);
  font-size: 1.15rem;
  font-weight: 500;
  letter-spacing: -0.025em;
  line-height: 1.15;
}

.analysis-status {
  flex: 0 0 auto;
  padding: 0.2rem 0.4rem;
  border-radius: var(--radius-full);
  background: var(--surface-sunken);
  color: var(--text-subtlest);
  font-size: 0.6875rem;
  font-weight: 650;
}

.analysis-card[data-status="ready"] .analysis-status {
  background: var(--sage-soft);
  color: var(--sage);
}

.analysis-card[data-status="loading"] .analysis-status {
  background: var(--sun-soft);
  color: var(--sun);
}

.analysis-card[data-status="error"] .analysis-status {
  background: var(--coral-soft);
  color: var(--coral);
}

.analysis-meta {
  margin-block-start: 0.35rem;
  color: var(--text-subtlest);
  font-size: 0.6875rem;
  font-weight: 650;
}

.analysis-mode-switch {
  display: inline-flex;
  gap: 0.15rem;
  margin-block-start: 0.75rem;
  padding: 0.15rem;
  border: 0.0625rem solid var(--border);
  border-radius: var(--radius-full);
  background: var(--surface-sunken);
}

.analysis-mode-switch button {
  min-height: 1.8rem;
  padding: 0.25rem 0.65rem;
  border-radius: var(--radius-full);
  background: transparent;
  color: var(--text-subtle);
  font-size: 0.6875rem;
  font-weight: 650;
}

.analysis-mode-switch button:hover,
.analysis-mode-switch button.is-selected {
  background: var(--surface);
  color: var(--brand);
  box-shadow: var(--shadow-raised);
}

.analysis-empty,
.analysis-loading,
.analysis-error {
  display: grid;
  min-height: 7rem;
  place-items: center;
  padding: 1rem 0.25rem 0.25rem;
  color: var(--text-subtle);
  text-align: center;
}

.analysis-empty-mark {
  display: grid;
  width: 2rem;
  height: 2rem;
  margin-block-end: 0.5rem;
  place-items: center;
  border-radius: var(--radius-full);
  background: var(--brand-soft);
  color: var(--brand);
  font-size: 1rem;
}

.analysis-empty p,
.analysis-loading p,
.analysis-error p {
  max-width: 19rem;
  margin: 0;
  font-size: 0.75rem;
  line-height: 1.55;
}

.analysis-error p {
  color: var(--coral);
}

.subscription-empty-state {
  display: grid;
  justify-items: center;
  min-height: 12rem;
  padding: 2rem 1rem;
  text-align: center;
}

.subscription-empty-state .eyebrow {
  margin: 0;
  color: var(--brand);
}

.subscription-empty-state h3 {
  margin: 0.35rem 0 0;
  color: var(--brand-ink);
  font-family: var(--font-reading);
  font-size: 1.2rem;
  font-weight: 500;
  letter-spacing: -0.025em;
  line-height: 1.15;
}

.subscription-empty-state p {
  max-width: 20rem;
  margin: 0.75rem 0 0;
  color: var(--text-subtle);
  font-size: 0.75rem;
  line-height: 1.55;
}

.subscription-empty-state .subscription-empty-hint {
  margin-block-start: 0.5rem;
  color: var(--text-subtlest);
  font-size: 0.6875rem;
}

.analysis-ready {
  padding-block-start: 0.75rem;
}

.analysis-result-section + .analysis-result-section {
  margin-block-start: 1rem;
  padding-block-start: 1rem;
  border-block-start: 0.0625rem solid var(--border);
}

.analysis-result-heading {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 0.75rem;
}

.analysis-result-heading h4 {
  margin: 0;
  color: var(--text);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.045em;
  text-transform: uppercase;
}

.analysis-result-tag,
.analysis-confidence {
  color: var(--text-subtlest);
  font-size: 0.625rem;
  font-weight: 650;
  text-transform: lowercase;
}

.analysis-alternatives {
  display: grid;
  gap: 0.5rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.analysis-alternative {
  display: grid;
  grid-template-columns: 1.25rem minmax(0, 1fr) auto;
  align-items: start;
  gap: 0.5rem;
  padding-block: 0.5rem;
  border-block-end: 0.0625rem solid var(--border);
}

.analysis-alternative:last-child {
  border-block-end: 0;
}

.analysis-alternative-number {
  display: grid;
  width: 1.25rem;
  height: 1.25rem;
  place-items: center;
  border-radius: var(--radius-full);
  background: var(--brand-soft);
  color: var(--brand);
  font-size: 0.625rem;
  font-weight: 700;
}

.analysis-alternative-copy {
  min-width: 0;
}

.analysis-alternative-text {
  display: block;
  color: var(--text);
  font-size: 0.8125rem;
  line-height: 1.45;
}

.analysis-alternative-note,
.analysis-paragraph,
.analysis-figure-caption {
  margin: 0.25rem 0 0;
  color: var(--text-subtle);
  font-size: 0.75rem;
  line-height: 1.55;
}

.analysis-copy-button {
  min-height: 1.8rem;
  padding: 0.25rem 0.45rem;
  font-size: 0.625rem;
}

.analysis-rewrite .analysis-result-heading {
  align-items: center;
}

.analysis-summary-callout {
  margin: 0.625rem 0 0;
  padding: 0.7rem 0.75rem;
  border-radius: var(--radius-medium);
  background: var(--brand-soft);
  color: var(--text);
  font-size: 0.8125rem;
  line-height: 1.55;
}

.analysis-key-points {
  display: grid;
  gap: 0.45rem;
  margin: 0.625rem 0 0;
  padding-inline-start: 1rem;
  color: var(--text-subtle);
  font-size: 0.75rem;
  line-height: 1.5;
}

.analysis-hard-terms {
  display: grid;
  grid-template-columns: minmax(0, 0.8fr) minmax(0, 1.2fr);
  gap: 0.45rem 0.75rem;
  margin: 0.625rem 0 0;
  font-size: 0.75rem;
  line-height: 1.45;
}

.analysis-hard-terms dt {
  color: var(--text);
  font-weight: 700;
}

.analysis-hard-terms dd {
  margin: 0;
  color: var(--text-subtle);
}

.analysis-original-quote {
  margin: 0.625rem 0 0;
  padding-inline-start: 0.75rem;
  border-inline-start: 0.125rem solid var(--brand);
  color: var(--text-subtle);
  font-family: var(--font-reading);
  font-size: 0.8125rem;
  line-height: 1.5;
}

.analysis-figure-image {
  display: block;
  width: 100%;
  max-height: 14rem;
  margin-block-start: 0.75rem;
  object-fit: contain;
  border: 0.0625rem solid var(--border);
  border-radius: var(--radius-medium);
  background: var(--surface-sunken);
}

.analysis-figure-summary {
  margin-block-start: 0.75rem;
}

.analysis-confidence {
  margin: 0.75rem 0 0;
}

.visualization-toggles {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.5rem;
  margin-block-start: 0.625rem;
}

.visualization-toggle {
  display: flex;
  min-height: 2.625rem;
  align-items: center;
  gap: 0.5rem;
  padding: 0.5rem 0.625rem;
  border: 0.0625rem solid var(--border);
  border-radius: var(--radius-medium);
  background: var(--surface);
  color: var(--text-subtle);
  font-size: 0.75rem;
  font-weight: 650;
  text-align: start;
}

.visualization-toggle:hover {
  border-color: var(--brand);
  background: var(--brand-soft);
  color: var(--brand);
}

.visualization-toggle.is-selected {
  border-color: var(--brand);
  background: var(--brand-soft);
  color: var(--brand);
}

.visualization-toggle-icon {
  display: inline-grid;
  min-width: 1.1rem;
  place-items: center;
  color: var(--sun);
  font-size: 0.8rem;
  font-weight: 700;
}

.api-key-settings {
  display: grid;
  gap: 0.4rem;
}

.field-label {
  margin-block-start: 0.35rem;
  color: var(--text-subtle);
  font-size: 0.6875rem;
  font-weight: 650;
}

.text-input {
  width: 100%;
  min-height: 2.25rem;
  padding: 0.45rem 0.625rem;
  border: 0.0625rem solid var(--border);
  border-radius: var(--radius-medium);
  outline: 0;
  background: var(--surface-sunken);
  color: var(--text);
  font-size: 0.75rem;
}

.text-input:hover {
  border-color: var(--border-strong);
}

.text-input:focus {
  border-color: var(--border-focused);
  box-shadow: 0 0 0 0.125rem var(--brand-soft);
}

.visualization-card {
  margin-block-start: 1rem;
  padding: 1rem;
  border: 0.0625rem solid var(--border);
  border-radius: var(--radius-large);
  background: var(--surface);
  box-shadow: var(--shadow-raised);
}

.visualization-card-heading {
  align-items: flex-start;
}

.visualization-card-heading h3 {
  margin: 0.25rem 0 0;
  color: var(--brand-ink);
  font-family: var(--font-reading);
  font-size: 1.15rem;
  font-weight: 500;
  letter-spacing: -0.025em;
  line-height: 1.15;
}

.visualization-status {
  flex: 0 0 auto;
  padding: 0.2rem 0.4rem;
  border-radius: var(--radius-full);
  background: var(--surface-sunken);
}

.visualization-card[data-status="ready"] .visualization-status {
  background: var(--sage-soft);
  color: var(--sage);
}

.visualization-card[data-status="loading"] .visualization-status {
  background: var(--sun-soft);
  color: var(--sun);
}

.visualization-card[data-status="error"] .visualization-status {
  background: var(--coral-soft);
  color: var(--coral);
}

.visualization-empty,
.visualization-loading,
.visualization-error {
  display: grid;
  min-height: 8rem;
  place-items: center;
  padding: 1rem 0.5rem 0.25rem;
  color: var(--text-subtle);
  text-align: center;
}

.visualization-empty-mark,
.visual-placeholder-mark {
  display: grid;
  width: 2rem;
  height: 2rem;
  margin-block-end: 0.5rem;
  place-items: center;
  border-radius: var(--radius-full);
  background: var(--brand-soft);
  color: var(--brand);
  font-size: 1rem;
}

.visualization-empty p,
.visualization-loading p,
.visualization-error p {
  max-width: 19rem;
  margin: 0;
  font-size: 0.75rem;
  line-height: 1.55;
}

.loading-pulse {
  display: block;
  width: 2.25rem;
  height: 2.25rem;
  margin-block-end: 0.5rem;
  border: 0.2rem solid var(--brand-soft);
  border-block-start-color: var(--brand);
  border-radius: var(--radius-full);
  animation: tutor-spin 850ms linear infinite;
}

@keyframes tutor-spin {
  to { transform: rotate(1turn); }
}

.visualization-summary,
.visual-frame-text {
  margin: 0;
  color: var(--text-subtle);
  font-size: 0.8125rem;
  line-height: 1.55;
}

.visualization-summary {
  color: var(--text);
}

.visual-media {
  display: block;
  max-width: 100%;
}

.visual-media-svg {
  display: block;
  width: 100%;
  height: auto;
  min-height: 0;
  flex: 1 1 auto;
  overflow: hidden;
  padding: 0;
  border-radius: 0;
  background: transparent;
  color: var(--text);
}

/* Inline visualization SVGs are documents in their own right, so do not let
   the reader's line-icon stroke leak onto their text and make light labels
   look black. */
.visual-media-svg text {
  stroke: none;
  stroke-width: 0;
}

.visual-media-image {
  display: block;
  width: 100%;
  height: 100%;
  min-height: 0;
  max-width: 100%;
  max-height: 100%;
  align-self: center;
  flex: 1 1 auto;
  object-fit: contain;
}

.visual-frame-text {
  width: 100%;
  margin-block-start: 0.625rem;
  color: var(--text);
}

.visual-placeholder {
  display: grid;
  width: 100%;
  min-height: 12rem;
  align-content: center;
  flex: 1 1 auto;
  place-items: center;
  color: var(--text-subtle);
  text-align: center;
}

.visual-placeholder strong,
.visual-placeholder span:last-child {
  display: block;
}

.visual-placeholder strong {
  color: var(--brand-ink);
  font-size: 0.8125rem;
}

.visual-placeholder span:last-child {
  margin-block-start: 0.25rem;
  font-size: 0.6875rem;
}

.interactive-map {
  display: flex;
  width: 100%;
  align-items: stretch;
  justify-content: center;
  gap: 0.25rem;
  flex-wrap: wrap;
}

.interactive-node {
  display: grid;
  min-width: 5.5rem;
  flex: 1 1 5.5rem;
  gap: 0.25rem;
  padding: 0.5rem;
  border: 0.0625rem solid var(--border);
  border-radius: var(--radius-medium);
  background: var(--surface);
  color: var(--text-subtle);
  font-size: 0.6875rem;
  font-weight: 650;
  text-align: start;
}

.interactive-node:hover,
.interactive-node.is-selected {
  border-color: var(--brand);
  background: var(--brand-soft);
  color: var(--brand);
}

.interactive-node small {
  display: -webkit-box;
  overflow: hidden;
  color: var(--text-subtlest);
  font-size: 0.625rem;
  font-weight: 400;
  line-height: 1.35;
  -webkit-box-orient: vertical;
  -webkit-line-clamp: 3;
}

.interactive-connector {
  display: grid;
  min-width: 1rem;
  place-items: center;
  color: var(--brand);
  font-size: 0.9rem;
}

.visualization-controls {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  margin-block-start: 0.75rem;
}

.visualization-control {
  min-height: 1.9rem;
  padding: 0.3rem 0.6rem;
  border: 0.0625rem solid var(--border);
  border-radius: var(--radius-medium);
  background: var(--surface);
  color: var(--text-subtle);
  font-size: 0.6875rem;
  font-weight: 650;
}

.visualization-control:hover:not(:disabled) {
  border-color: var(--brand);
  background: var(--brand-soft);
  color: var(--brand);
}

.visualization-control:disabled {
  cursor: not-allowed;
  opacity: 0.45;
}

.visualization-counter {
  min-width: 2.5rem;
  color: var(--text-subtlest);
  font-size: 0.6875rem;
  text-align: center;
}

@media (max-width: 48rem) {
  .tutor-panel {
    inset-block-start: 3.75rem;
    width: min(28rem, 100vw);
  }

  .tutor-panel-scrim:not([hidden]) {
    position: fixed;
    z-index: 16;
    inset: 0;
    display: block;
    background: #102b4d33;
  }

  .tutor-toggle-button span {
    display: none;
  }

  .tutor-toggle-button {
    width: 2.25rem;
    padding: 0;
  }
}

@media (max-width: 30rem) {
  .tutor-panel-scroll {
    padding-inline: 1rem;
  }

  .visualization-toggles {
    gap: 0.375rem;
  }
}

/* Persistent tutor column: the book and tutor are two working surfaces in
   the same viewport. The reader flexes; the tutor keeps a stable width so
   its controls never cover or resize the document unexpectedly. */
.workspace {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 25rem;
  grid-template-rows: minmax(0, 1fr);
  height: calc(100dvh - 4rem);
  min-height: 0;
  overflow: hidden;
}

.reader-column {
  min-width: 0;
  min-height: 0;
}

.tutor-panel-scrim {
  display: none !important;
}

.tutor-panel {
  position: relative;
  inset: auto;
  display: flex;
  width: auto;
  min-width: 0;
  max-width: none;
  height: 100%;
  min-height: 0;
  flex-direction: column;
  border-inline-start: 0.0625rem solid var(--border);
  background: var(--surface);
  box-shadow: none;
  pointer-events: auto;
  transform: none;
  transition: none;
  visibility: visible;
}

.tutor-panel.is-open {
  pointer-events: auto;
  transform: none;
  visibility: visible;
}

.tutor-panel-tabs {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  flex: 0 0 auto;
  gap: 0.125rem;
  padding: 0 1rem;
  border-block-end: 0.0625rem solid var(--border);
  background: var(--surface);
}

.tutor-panel-tabs.is-single-tab {
  grid-template-columns: minmax(0, 1fr);
}

.tutor-panel-tab {
  min-height: 2.5rem;
  padding: 0.5rem 0.25rem;
  border: 0;
  border-block-end: 0.125rem solid transparent;
  border-radius: 0;
  background: transparent;
  color: var(--text-subtle);
  font-size: 0.75rem;
  font-weight: 700;
  line-height: 1.2;
}

.tutor-panel-tab:hover {
  color: var(--brand);
}

.tutor-panel-tab.is-selected,
.tutor-panel-tab[aria-selected="true"] {
  border-block-end-color: var(--brand);
  color: var(--brand);
}

.tutor-panel-views {
  display: flex;
  min-height: 0;
  flex: 1 1 auto;
  flex-direction: column;
}

.tutor-panel-view {
  display: flex;
  min-height: 0;
  flex: 1 1 auto;
  flex-direction: column;
}

.tutor-context-tabpanel > .tutor-panel-scroll {
  min-height: 0;
  flex: 1 1 auto;
}

.settings-page-heading {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 1rem;
  padding-block: 0.25rem 0.75rem;
}

.settings-page-heading h3 {
  margin: 0.25rem 0 0;
  color: var(--brand-ink);
  font-family: var(--font-reading);
  font-size: 1.5rem;
  font-weight: 500;
  letter-spacing: -0.035em;
  line-height: 1.1;
}

.settings-intro {
  margin: 0 0 0.25rem;
  color: var(--text-subtle);
  font-size: 0.75rem;
  line-height: 1.5;
}

.settings-section {
  padding-block: 1rem;
  border-block-start: 0.0625rem solid var(--border);
}

.settings-section.api-key-settings {
  display: grid;
  gap: 0.4rem;
}

.settings-field {
  display: block;
  margin-block-start: 0.55rem;
  color: var(--text-subtle);
  font-size: 0.6875rem;
  font-weight: 650;
}

.settings-field + .text-input {
  margin-block-start: 0.25rem;
}

.settings-range {
  width: 100%;
  margin-block-start: 0.55rem;
  accent-color: var(--brand);
}

.settings-presets {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.375rem;
  margin-block-start: 0.35rem;
}

.settings-chip {
  min-height: 1.875rem;
  padding: 0.3rem 0.6rem;
  font-size: 0.6875rem;
}

.settings-chip.is-selected {
  border-color: var(--brand);
  background: var(--brand-soft);
  color: var(--brand);
}

.settings-status-row {
  align-items: center;
}

.settings-status-row .tutor-help {
  margin-block-start: 0;
}

.settings-checkbox {
  display: flex;
  align-items: flex-start;
  gap: 0.5rem;
  margin-block-start: 0.75rem;
  color: var(--text);
  cursor: pointer;
  font-size: 0.75rem;
  font-weight: 650;
}

.settings-checkbox input {
  width: auto;
  flex: 0 0 auto;
  margin: 0.15rem 0 0;
  accent-color: var(--brand);
}

.settings-checkbox > span {
  display: block;
  min-width: 0;
}

.settings-checkbox .tutor-help {
  display: block;
  margin-block-start: 0.2rem;
  font-weight: 400;
}

.endpoint-readout {
  display: grid;
  gap: 0.25rem;
  margin-block-start: 0.75rem;
  padding: 0.625rem 0.7rem;
  border: 0.0625rem solid var(--border);
  border-radius: var(--radius-medium);
  background: var(--surface-sunken);
  color: var(--text-subtle);
  font-size: 0.6875rem;
  line-height: 1.45;
  overflow-wrap: anywhere;
}

.endpoint-readout code {
  color: var(--text);
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 0.65rem;
}

.settings-note {
  margin: 0.35rem 0 0;
  color: var(--text-subtlest);
  font-size: 0.6875rem;
  line-height: 1.5;
}

.settings-note code {
  color: var(--text-subtle);
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 0.65rem;
}

.settings-divider {
  margin: 1.25rem 0 0;
  padding-block-start: 1rem;
  border-block-start: 0.0625rem solid var(--border);
  color: var(--text);
  font-size: 0.8125rem;
  font-weight: 650;
}

.settings-feedback {
  min-height: 1.25rem;
  margin: 0.75rem 0 0;
  color: var(--text-subtle);
  font-size: 0.6875rem;
  line-height: 1.45;
}

.settings-feedback.is-ok {
  color: var(--sage);
}

.settings-feedback.is-error {
  color: var(--coral);
}

.settings-feedback.is-loading {
  color: var(--sun);
}

.settings-actions {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin-block-start: 0.35rem;
}

.settings-actions .button {
  min-height: 2rem;
  padding-block: 0.35rem;
  font-size: 0.75rem;
}

.settings-actions-spacer {
  flex: 1;
}

.settings-mcp-section {
  padding-block-end: 1.5rem;
}

@media (max-width: 64rem) {
  .workspace {
    grid-template-columns: minmax(0, 1fr) 22rem;
  }
}

@media (max-width: 48rem) {
  .workspace {
    grid-template-columns: 1fr;
    grid-template-rows: minmax(0, 1fr) auto;
    height: auto;
    min-height: calc(100dvh - 3.75rem);
    overflow: visible;
  }

  .reader-column {
    height: calc(100dvh - 3.75rem);
    min-height: 32rem;
  }

  .tutor-panel {
    height: auto;
    min-height: 30rem;
    border-inline-start: 0;
    border-block-start: 0.0625rem solid var(--border);
  }

  .tutor-panel-scroll {
    max-height: 38rem;
  }

}

/* Reference-style visual actions stay with the context tab. The chat tab owns
   its full panel height so only its messages need to scroll. */
.visual-cta {
  padding-block: 0.9rem 1rem;
}

.visual-cta .cta-label {
  margin: 0 0 0.625rem;
  color: var(--text-subtle);
  font-size: 0.6875rem;
  font-weight: 650;
}

.visual-options {
  display: flex;
  flex-wrap: wrap;
  gap: 0.375rem;
  margin: 0;
}

.visual-options .visualization-toggle {
  display: flex;
  min-width: 0;
  min-height: 3.5rem;
  flex: 1 1 6.25rem;
  min-width: 6.25rem;
  align-items: center;
  justify-content: center;
  padding: 0.5rem 0.4rem;
  border: 0.0625rem solid var(--brand);
  border-radius: var(--radius-medium);
  background: transparent;
  color: var(--brand);
  font-size: 0.75rem;
  font-weight: 650;
  line-height: 1.25;
  text-align: center;
}

.visual-options .visualization-toggle:hover:not(:disabled),
.visual-options .visualization-toggle.is-selected {
  background: var(--brand-soft);
  color: var(--brand);
}

.visual-options .visualization-toggle:disabled {
  cursor: wait;
  opacity: 0.55;
}

.visualization-card[hidden] {
  display: none;
}

.tutor-chat {
  display: flex;
  min-height: 0;
  max-height: none;
  flex: 1 1 auto;
  flex-direction: column;
  border-block-start: 0;
  background: var(--surface);
}

.chat-header {
  display: flex;
  flex: 0 0 auto;
  align-items: center;
  gap: 0.5rem;
  padding: 0.75rem 1rem 0.625rem;
}

.chat-heading {
  display: flex;
  min-width: 0;
  flex: 1;
  align-items: baseline;
  justify-content: space-between;
  gap: 0.75rem;
  padding: 0;
  border: 0;
  background: transparent;
  color: var(--text);
  font-size: 0.8125rem;
  font-weight: 700;
  text-align: start;
}

.chat-heading > .muted {
  min-width: 0;
  overflow: hidden;
  font-weight: 500;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.caret {
  color: var(--text-subtle);
  font-size: 0.75rem;
}

.chat-new {
  min-height: 1.75rem;
  padding: 0.25rem 0.5rem;
  font-size: 0.6875rem;
}

.chat-expand {
  min-height: 1.75rem;
  padding: 0.25rem 0.5rem;
  font-size: 0.6875rem;
}

.chat-messages {
  display: flex;
  min-height: 0;
  flex: 1 1 auto;
  flex-direction: column;
  gap: 0.625rem;
  overflow-x: hidden;
  overflow-y: auto;
  overscroll-behavior: contain;
  padding: 0 1rem 0.75rem;
  scrollbar-gutter: stable;
}

.chat-empty {
  padding-block: 0.1rem 0.2rem;
}

.chat-starters {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
}

.chat-starter {
  min-height: 2rem;
  padding: 0.4rem 0.65rem;
  border: 0.0625rem solid var(--border);
  border-radius: var(--radius-full);
  background: transparent;
  color: var(--text-subtle);
  font-size: 0.6875rem;
  font-weight: 600;
  line-height: 1.25;
  text-align: start;
}

.chat-starter:hover:not(:disabled) {
  border-color: var(--brand);
  background: var(--brand-soft);
  color: var(--brand);
}

.chat-starter:disabled {
  cursor: not-allowed;
  opacity: 0.48;
}

.chat-note,
.chat-config-note {
  margin: 0.65rem 0 0;
  color: var(--text-subtlest);
  font-size: 0.6875rem;
  line-height: 1.5;
}

.chat-config-note {
  color: var(--coral);
}

.chat-turn {
  display: flex;
  max-width: 100%;
  flex-direction: column;
  align-items: flex-start;
  gap: 0.25rem;
}

.chat-turn-user {
  align-items: flex-end;
}

.chat-bubble {
  max-width: 94%;
  padding: 0.6rem 0.7rem;
  border: 0.0625rem solid var(--border);
  border-radius: var(--radius-medium);
  background: var(--surface-sunken);
  color: var(--text);
  font-size: calc(0.75rem * var(--chat-font-scale, 1));
  line-height: 1.55;
  overflow-wrap: anywhere;
  white-space: pre-wrap;
}

.chat-bubble.chat-markdown {
  white-space: normal;
}

.chat-markdown > :first-child {
  margin-block-start: 0;
}

.chat-markdown > :last-child {
  margin-block-end: 0;
}

.chat-markdown p,
.chat-markdown h1,
.chat-markdown h2,
.chat-markdown h3,
.chat-markdown h4,
.chat-markdown h5,
.chat-markdown h6,
.chat-markdown blockquote,
.chat-markdown pre,
.chat-markdown .chat-table-wrap,
.chat-markdown ul,
.chat-markdown ol {
  margin-block: 0 0 0.65rem;
}

.chat-markdown h1,
.chat-markdown h2,
.chat-markdown h3,
.chat-markdown h4,
.chat-markdown h5,
.chat-markdown h6 {
  color: var(--text);
  font-size: calc(0.8125rem * var(--chat-font-scale, 1));
  line-height: 1.35;
}

.chat-markdown ul,
.chat-markdown ol {
  padding-inline-start: 1.25rem;
}

.chat-markdown .chat-table-wrap {
  max-width: 100%;
  overflow-x: auto;
  overscroll-behavior-inline: contain;
  scrollbar-gutter: stable;
}

.chat-markdown table {
  width: 100%;
  min-width: 30rem;
  border: 0.0625rem solid var(--border);
  border-spacing: 0;
  border-collapse: separate;
  border-radius: var(--radius-medium);
  background: var(--surface);
  color: var(--text);
  text-align: start;
}

.chat-markdown th,
.chat-markdown td {
  padding: 0.45rem 0.55rem;
  border-inline-end: 0.0625rem solid var(--border);
  border-block-end: 0.0625rem solid var(--border);
  vertical-align: top;
  line-height: 1.45;
  text-align: start;
}

.chat-markdown th {
  background: var(--brand-soft);
  color: var(--brand-ink);
  font-weight: 700;
}

.chat-markdown tr:last-child td {
  border-block-end: 0;
}

.chat-markdown th:last-child,
.chat-markdown td:last-child {
  border-inline-end: 0;
}

.chat-markdown li + li {
  margin-block-start: 0.25rem;
}

.chat-markdown blockquote {
  padding-inline-start: 0.7rem;
  border-inline-start: 0.15rem solid var(--brand);
  color: var(--text-subtle);
}

.chat-markdown blockquote > :last-child {
  margin-block-end: 0;
}

.chat-markdown code {
  padding: 0.08rem 0.25rem;
  border-radius: 0.25rem;
  background: var(--brand-soft);
  color: var(--text);
  font-family: ui-monospace, SFMono-Regular, Consolas, "Liberation Mono", monospace;
  font-size: 0.92em;
}

.chat-math {
  display: inline-block;
  max-width: 100%;
  vertical-align: baseline;
}

.chat-math-display {
  display: block;
  overflow-x: auto;
  overflow-y: hidden;
  margin-block: 0.85rem;
  text-align: center;
}

.chat-math-display .katex-display {
  margin: 0;
}

.chat-math-fallback {
  padding-inline: 0.15rem;
  font-family: ui-monospace, SFMono-Regular, Consolas, "Liberation Mono", monospace;
}

.chat-markdown pre {
  max-width: 100%;
  overflow-x: auto;
  padding: 0.6rem;
  border-radius: 0.35rem;
  background: var(--surface-sunken);
}

.chat-markdown pre code {
  padding: 0;
  background: transparent;
  white-space: pre;
}

.chat-markdown hr {
  margin-block: 0.8rem;
  border: 0;
  border-block-start: 0.0625rem solid var(--border);
}

.chat-markdown a {
  color: var(--brand);
  text-decoration: underline;
  text-underline-offset: 0.12em;
}

.chat-turn-user .chat-bubble {
  border-color: var(--brand-soft);
  background: var(--brand-soft);
  color: var(--text);
}

.chat-turn.is-error .chat-bubble {
  border-color: var(--coral-soft);
  background: var(--coral-soft);
  color: var(--coral);
}

.chat-pending-mark {
  display: inline-block;
  margin-inline-end: 0.35rem;
  color: var(--sun);
  animation: chat-pulse 900ms ease-in-out infinite alternate;
}

.chat-pending-text {
  color: var(--text-subtle);
}

@keyframes chat-pulse {
  from { opacity: 0.35; }
  to { opacity: 1; }
}

.chat-sources {
  max-width: 94%;
  color: var(--text-subtlest);
  font-size: 0.625rem;
  line-height: 1.4;
}

.chat-input {
  display: flex;
  flex: 0 0 auto;
  align-items: flex-end;
  gap: 0.5rem;
  padding: 0.7rem 1rem 0.9rem;
  border-block-start: 0.0625rem solid var(--border);
}

.chat-input textarea {
  min-height: 2.6rem;
  max-height: 8.5rem;
  flex: 1;
  resize: none;
  overflow-y: auto;
  padding: 0.65rem 0.7rem;
  border: 0.0625rem solid var(--border);
  border-radius: var(--radius-medium);
  outline: 0;
  background: var(--surface-sunken);
  color: var(--text);
  font: inherit;
  font-size: 0.75rem;
  line-height: 1.35;
}

.chat-input textarea::placeholder {
  color: var(--text-subtlest);
}

.chat-input textarea:focus {
  border-color: var(--border-focused);
  box-shadow: 0 0 0 0.125rem var(--brand-soft);
}

.chat-input textarea:disabled {
  cursor: not-allowed;
  opacity: 0.65;
}

.chat-send {
  display: grid;
  width: 2.35rem;
  height: 2.35rem;
  flex: 0 0 auto;
  place-items: center;
  border: 0.0625rem solid var(--brand);
  border-radius: var(--radius-full);
  background: var(--brand);
  color: var(--surface);
  font-size: 1rem;
  font-weight: 700;
}

.chat-send:hover:not(:disabled) {
  background: var(--brand-ink);
}

.chat-send:disabled {
  cursor: not-allowed;
  opacity: 0.4;
}

.chat-overlay {
  position: fixed;
  z-index: 45;
  inset: 0;
  display: grid;
  place-items: center;
  padding: clamp(0.75rem, 3vw, 2rem);
}

.chat-overlay-backdrop {
  position: absolute;
  inset: 0;
  background: rgb(8 14 22 / 72%);
  backdrop-filter: blur(2px);
}

.chat-dialog {
  position: relative;
  z-index: 1;
  display: flex;
  width: min(72rem, 100%);
  height: min(54rem, 92dvh);
  min-height: 0;
  flex-direction: column;
  overflow: hidden;
  border: 0.0625rem solid var(--border-strong);
  border-radius: var(--radius-large);
  background: var(--surface);
  box-shadow: var(--shadow-overlay);
}

.chat-dialog-header {
  display: flex;
  flex: 0 0 auto;
  align-items: flex-start;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.9rem 1rem;
  border-block-end: 0.0625rem solid var(--border);
}

.chat-dialog-title {
  min-width: 0;
}

.chat-dialog-title h2 {
  margin: 0;
  overflow: hidden;
  color: var(--brand-ink);
  font-family: var(--font-reading);
  font-size: clamp(1.25rem, 2vw, 1.75rem);
  font-weight: 500;
  letter-spacing: -0.035em;
  line-height: 1.08;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.chat-dialog-title .muted {
  display: block;
  margin-block-start: 0.3rem;
}

.chat-dialog-actions {
  display: flex;
  flex: 0 0 auto;
  gap: 0.45rem;
}

.chat-dialog-actions .button {
  min-height: 2rem;
  padding-block: 0.35rem;
  font-size: 0.6875rem;
}

.chat-dialog-body {
  display: flex;
  min-height: 0;
  flex: 1 1 auto;
  flex-direction: column;
  overflow: hidden;
  background: var(--surface-sunken);
}

.chat-dialog-body .chat-messages {
  padding: clamp(1rem, 3vw, 2rem) clamp(1rem, 4vw, 3rem) 1rem;
}

.chat-dialog-body .chat-turn-assistant {
  width: 100%;
}

.chat-dialog-body .chat-turn-assistant .chat-bubble,
.chat-dialog-body .chat-turn-assistant .chat-sources {
  width: 100%;
  max-width: 100%;
}

.chat-dialog-body .chat-bubble {
  font-size: calc(0.875rem * var(--chat-font-scale, 1));
}

.chat-dialog-body .chat-input {
  padding-inline: clamp(1rem, 4vw, 3rem);
}

@media (max-width: 48rem) {
  .tutor-chat {
    min-height: 18rem;
    max-height: none;
  }

  .visual-options .visualization-toggle {
    min-height: 3rem;
    font-size: 0.6875rem;
  }

  .chat-overlay {
    padding: 0.5rem;
  }

  .chat-dialog {
    height: calc(100dvh - 1rem);
    border-radius: var(--radius-medium);
  }
}

/* The visual actions are their own fixed band beneath the scrolling context.
   The generated artifact is opened in the overlay below, so a large SVG or
   image never pushes the context or chat scroll surface. */
.tutor-visual-surface {
  flex: 0 0 auto;
  min-height: 0;
  border-block-start: 0.0625rem solid var(--border);
  background: var(--surface);
}

.tutor-visual-surface .visual-cta {
  padding: 0.7rem 1rem 0.65rem;
}

.tutor-visual-surface .visual-cta .cta-label {
  margin-block-end: 0.5rem;
}

.tutor-visual-surface .visualization-card {
  margin: 0 1rem 0.8rem;
  padding: 0.7rem 0.75rem;
  border-radius: var(--radius-medium);
  box-shadow: none;
}

.visualization-job-row {
  display: flex;
  min-width: 0;
  align-items: center;
  gap: 0.65rem;
}

.visualization-job-mark {
  display: block;
  width: 0.55rem;
  height: 0.55rem;
  flex: 0 0 auto;
  border-radius: var(--radius-full);
  background: var(--sage);
}

.visualization-card[data-status="loading"] .visualization-job-mark {
  border: 0.125rem solid var(--border);
  border-block-start-color: var(--sun);
  background: transparent;
  animation: tutor-spin 850ms linear infinite;
}

.visualization-card[data-status="error"] .visualization-job-mark {
  background: var(--coral);
}

.visualization-job-copy {
  min-width: 0;
  flex: 1;
}

.visualization-job-copy strong {
  display: block;
  overflow: hidden;
  color: var(--text);
  font-size: 0.75rem;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.visualization-job-copy p {
  overflow: hidden;
  margin: 0.2rem 0 0;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.visualization-card[data-status="error"] .visualization-job-copy p {
  color: var(--coral);
}

.visualization-job-actions {
  display: flex;
  flex: 0 0 auto;
  gap: 0.4rem;
}

.visualization-job-button {
  min-height: 2rem;
  padding: 0.35rem 0.65rem;
  font-size: 0.6875rem;
}

.visualization-overlay {
  position: fixed;
  z-index: 40;
  inset: 0;
  display: grid;
  place-items: center;
  padding: clamp(0.75rem, 3vw, 2rem);
}

.visualization-overlay-backdrop {
  position: absolute;
  inset: 0;
  background: rgb(8 14 22 / 72%);
  backdrop-filter: blur(2px);
}

.visualization-dialog {
  position: relative;
  z-index: 1;
  display: flex;
  width: min(72rem, 100%);
  height: min(54rem, 92dvh);
  min-height: 0;
  flex-direction: column;
  overflow: hidden;
  border: 0.0625rem solid var(--border-strong);
  border-radius: var(--radius-large);
  background: var(--surface);
  box-shadow: var(--shadow-overlay);
}

.visualization-dialog-header {
  display: flex;
  flex: 0 0 auto;
  align-items: flex-start;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.9rem 1rem;
  border-block-end: 0.0625rem solid var(--border);
}

.visualization-dialog-title {
  min-width: 0;
}

.visualization-dialog-title h2 {
  margin: 0;
  overflow: hidden;
  color: var(--brand-ink);
  font-family: var(--font-reading);
  font-size: clamp(1.25rem, 2vw, 1.75rem);
  font-weight: 500;
  letter-spacing: -0.035em;
  line-height: 1.08;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.visualization-dialog-title .muted {
  display: block;
  margin-block-start: 0.3rem;
}

.visualization-dialog-actions {
  display: flex;
  flex: 0 0 auto;
  gap: 0.45rem;
}

.visualization-dialog-actions .button {
  min-height: 2rem;
  padding-block: 0.35rem;
  font-size: 0.6875rem;
}

.visualization-dialog-body {
  display: flex;
  min-height: 0;
  flex: 1 1 auto;
  flex-direction: column;
  overflow: auto;
  overscroll-behavior: contain;
  padding: clamp(0.75rem, 2vw, 1.25rem);
  background: var(--surface-sunken);
}

.visualization-dialog-body > .visualization-summary {
  max-width: 72ch;
  flex: 0 0 auto;
  margin-block-end: 0.85rem;
}

.visualization-dialog-body > .visualization-media-item {
  min-height: 18rem;
  flex: 1 1 auto;
  margin-block-start: 0;
  overflow: auto;
}

.visualization-dialog-body > .visual-media-svg {
  align-self: stretch;
  width: 100%;
  height: auto;
  overflow: hidden;
  background: transparent;
}

.architecture-viewer-frame {
  display: block;
  flex: 1 1 auto;
  width: 100%;
  min-height: 22rem;
  border: 0;
  background: var(--surface);
}

.architecture-viewer-fallback {
  display: grid;
  flex: 1 1 auto;
  place-items: center;
  gap: 0.65rem;
  padding: clamp(1.5rem, 5vw, 3rem);
  text-align: center;
  background: var(--surface);
}

.architecture-viewer-fallback strong,
.architecture-viewer-fallback p {
  max-width: 34rem;
  margin: 0;
}

.architecture-viewer-fallback .visual-placeholder-mark {
  display: grid;
  width: 2.6rem;
  height: 2.6rem;
  place-items: center;
  border-radius: 50%;
  background: color-mix(in srgb, var(--accent) 14%, transparent);
}

.architecture-viewer-fallback p {
  line-height: 1.55;
}

.visualization-dialog-body > .visual-media-image {
  width: 100%;
  height: 100%;
  min-height: 0;
  flex: 1 1 auto;
  max-height: 100%;
}

.visualization-dialog-body > .visual-media-svg {
  width: 100%;
  height: auto;
  max-height: 100%;
}

.visualization-dialog-body > .visualization-media-text {
  flex: 0 0 auto;
}

.visualization-dialog-body > .visualization-controls {
  flex: 0 0 auto;
}

.visualization-overlay-loading,
.visualization-overlay-error {
  display: grid;
  min-height: 14rem;
  flex: 1 1 auto;
  place-items: center;
  padding: 2rem;
  text-align: center;
}

.visualization-overlay-error p {
  max-width: 36rem;
  margin: 0;
  color: var(--coral);
  line-height: 1.55;
}

@media (max-width: 48rem) {
  .visualization-dialog {
    width: 100%;
    height: 100%;
    border-radius: 0;
  }

  .visualization-dialog-header {
    padding-inline: 0.8rem;
  }

  .visualization-dialog-title h2 {
    font-size: 1.2rem;
  }

  .visualization-dialog-actions .button {
    padding-inline: 0.5rem;
  }

  .visualization-dialog-body > .visualization-media-item {
    min-height: 14rem;
  }
}