@font-face {
  font-family: "OpenAI Sans";
  font-style: normal;
  font-weight: 400;
  font-display: swap;
  src: url("https://cdn.openai.com/common/fonts/openai-sans/v2/OpenAISans-Regular.woff2") format("woff2");
}

@font-face {
  font-family: "OpenAI Sans";
  font-style: normal;
  font-weight: 500;
  font-display: swap;
  src: url("https://cdn.openai.com/common/fonts/openai-sans/v2/OpenAISans-Medium.woff2") format("woff2");
}

@font-face {
  font-family: "OpenAI Sans";
  font-style: normal;
  font-weight: 600;
  font-display: swap;
  src: url("https://cdn.openai.com/common/fonts/openai-sans/v2/OpenAISans-Semibold.woff2") format("woff2");
}

:root {
  color-scheme: light;
  --font-sans: "OpenAI Sans", ui-sans-serif, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --font-mono: "SF Mono", "SFMono-Regular", ui-monospace, Consolas, "Liberation Mono", Menlo, monospace;
  --white: #fff;
  --black: #000;
  --ink: #282828;
  --ink-strong: #0d0d0d;
  --ink-secondary: #5d5d5d;
  --ink-tertiary: #8f8f8f;
  --surface: #fff;
  --surface-secondary: #f9f9f9;
  --surface-tertiary: #f3f3f3;
  --surface-active: #ededed;
  --line: rgb(13 13 13 / 8%);
  --line-strong: rgb(13 13 13 / 13%);
  --button-dark: #181818;
  --button-dark-hover: #303030;
  --button-foreground: #fff;
  --blue: #0285ff;
  --green: #008f45;
  --green-soft: #ebf8ef;
  --red: #ce3531;
  --red-soft: #fff0ef;
  --amber: #966018;
  --amber-soft: #fff7e7;
  --purple: #7441c4;
  --purple-soft: #f4efff;
  --radius-sm: 6px;
  --radius-md: 8px;
  --radius-lg: 10px;
  --radius-xl: 12px;
  --radius-2xl: 16px;
  --radius-3xl: 20px;
  --radius-4xl: 24px;
  --radius-full: 9999px;
  --spacing-unit: 4px;
  --header-height: 64px;
  --content-width: 1200px;
  --shadow-soft: 0 4px 8px -2px rgb(0 0 0 / 8%), 0 1px 2px rgb(0 0 0 / 4%);
  --shadow-panel: 0 14px 34px -18px rgb(0 0 0 / 18%), 0 2px 8px rgb(0 0 0 / 5%);
  --transition-fast: 160ms ease;
}

html[data-theme="dark"] {
  color-scheme: dark;
  --ink: #dcdcdc;
  --ink-strong: #fff;
  --ink-secondary: #b9b9b9;
  --ink-tertiary: #8f8f8f;
  --surface: #000;
  --surface-secondary: #181818;
  --surface-tertiary: #212121;
  --surface-active: #303030;
  --line: rgb(255 255 255 / 8%);
  --line-strong: rgb(255 255 255 / 14%);
  --button-dark: #f3f3f3;
  --button-dark-hover: #dfdfdf;
  --button-foreground: #0d0d0d;
  --blue: #339cff;
  --green: #40c977;
  --green-soft: rgb(64 201 119 / 14%);
  --red: #ff6764;
  --red-soft: rgb(255 103 100 / 14%);
  --amber: #e9b36e;
  --amber-soft: rgb(233 179 110 / 14%);
  --purple: #c4a6ff;
  --purple-soft: rgb(146 79 247 / 16%);
  --shadow-soft: 0 4px 8px -2px rgb(0 0 0 / 36%), 0 1px 2px rgb(0 0 0 / 20%);
  --shadow-panel: 0 14px 34px -18px rgb(0 0 0 / 58%), 0 2px 8px rgb(0 0 0 / 24%);
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  min-height: 100%;
  background: var(--surface);
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  min-width: 340px;
  min-height: 100vh;
  margin: 0;
  background: var(--surface);
  color: var(--ink);
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.5;
  letter-spacing: -0.01em;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body:has(.landing) {
  min-width: 0;
}

body.lab-open,
body:has(.lab-shell:not([hidden]):not(.is-hidden)) {
  overflow: hidden;
}

[hidden],
.is-hidden,
.hidden {
  display: none !important;
}

::selection {
  background: rgb(2 133 255 / 16%);
}

:focus-visible {
  outline: 2px solid var(--blue);
  outline-offset: 3px;
}

a {
  color: inherit;
  text-decoration: none;
}

button,
input,
textarea,
select {
  color: inherit;
  font: inherit;
}

button {
  cursor: pointer;
}

button:disabled {
  cursor: not-allowed;
  opacity: 0.48;
}

img,
svg {
  display: block;
  max-width: 100%;
}

svg {
  width: 19px;
  height: 19px;
  flex-shrink: 0;
}

.icon-sprite {
  position: absolute;
  width: 0;
  height: 0;
  overflow: hidden;
  pointer-events: none;
}

.noscript-message {
  max-width: 560px;
  margin: 100px auto;
  padding: 0 24px;
}

p,
h1,
h2,
h3,
h4 {
  margin-top: 0;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
  clip-path: inset(50%);
}

.site-header {
  position: sticky;
  z-index: 20;
  top: 0;
  height: var(--header-height);
  border-bottom: 1px solid var(--line);
  background: var(--surface);
}

.header-inner {
  display: grid;
  height: 100%;
  grid-template-columns: minmax(150px, 1fr) auto minmax(150px, 1fr);
  align-items: center;
  padding: 0 24px;
}

.brand,
.lab-brand {
  display: inline-flex;
  min-width: 0;
  align-items: center;
  gap: 10px;
  font-size: 15px;
  font-weight: 600;
  letter-spacing: -0.025em;
}

.brand svg,
.brand img,
.lab-brand svg,
.lab-brand img {
  width: 24px;
  height: 24px;
  flex: 0 0 auto;
}

.brand-divider,
.lab-brand span + span {
  color: var(--ink-secondary);
  font-weight: 400;
}

.brand-label {
  color: var(--ink);
  font-weight: 600;
  white-space: nowrap;
}

.top-nav,
.header-actions {
  display: flex;
  align-items: center;
  gap: 4px;
}

.top-nav a,
.top-nav button {
  padding: 4px 10px;
  border: 0;
  border-radius: var(--radius-md);
  background: transparent;
  font-size: 14px;
  line-height: 20px;
  transition: background var(--transition-fast), color var(--transition-fast);
}

.top-nav a:hover,
.top-nav button:hover,
.top-nav .active,
.top-nav [aria-current="page"] {
  background: var(--surface-active);
}

.header-actions {
  justify-content: flex-end;
  gap: 12px;
}

.primary-button,
.secondary-button,
.ghost-button {
  display: inline-flex;
  min-height: 44px;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 0 19px;
  border: 1px solid transparent;
  border-radius: var(--radius-full);
  font-size: 14px;
  font-weight: 500;
  line-height: 1;
  white-space: nowrap;
  transition: background var(--transition-fast), border-color var(--transition-fast), color var(--transition-fast), transform var(--transition-fast);
}

.primary-button {
  background: var(--button-dark);
  color: var(--button-foreground);
}

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

.secondary-button {
  background: var(--surface-active);
  color: var(--ink);
}

.secondary-button:hover {
  background: var(--surface-tertiary);
}

.ghost-button {
  border-color: var(--line-strong);
  background: var(--surface);
}

.ghost-button:hover {
  background: var(--surface-secondary);
}

.primary-button:active,
.secondary-button:active,
.ghost-button:active {
  transform: translateY(1px);
}

.header-actions .primary-button,
.header-actions .secondary-button,
.header-actions .ghost-button {
  min-height: 36px;
  padding: 0 15px;
}

.button-small,
.small-button {
  min-height: 34px;
  padding: 0 14px;
  font-size: 13px;
}

.icon-button,
.menu-toggle {
  display: inline-grid;
  width: 36px;
  height: 36px;
  padding: 0;
  place-items: center;
  border: 0;
  border-radius: var(--radius-sm);
  background: transparent;
  color: var(--ink-secondary);
  transition: background var(--transition-fast), color var(--transition-fast);
}

.icon-button:hover,
.menu-toggle:hover {
  background: var(--surface-tertiary);
  color: var(--ink);
}

.header-search {
  border-color: var(--line);
  color: var(--ink-secondary);
  font-weight: 400;
}

.header-theme {
  width: 36px;
  height: 36px;
  flex: 0 0 36px;
  border-radius: var(--radius-full);
}

.header-theme svg {
  width: 16px;
  height: 16px;
}

.menu-toggle {
  display: none;
}

.landing {
  min-height: calc(100vh - var(--header-height));
}

.hero,
.tracks-section,
.course-section,
.work-banner,
.site-footer {
  width: min(var(--content-width), calc(100% - 96px));
  margin-right: auto;
  margin-left: auto;
}

.hero {
  padding: 96px 0 104px;
}

.hero-grid {
  display: grid;
  min-height: 490px;
  grid-template-columns: minmax(0, 0.91fr) minmax(0, 1.09fr);
  align-items: center;
  gap: clamp(38px, 5.8vw, 76px);
}

.hero-copy {
  max-width: 555px;
}

.eyebrow,
.lesson-kicker {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin: 0 0 17px;
  color: var(--ink-secondary);
  font-size: 13px;
  font-weight: 500;
  letter-spacing: 0.005em;
}

.eyebrow svg,
.lesson-kicker svg {
  width: 16px;
  height: 16px;
}

.hero-title {
  margin: 0 0 20px;
  color: var(--ink);
  font-size: clamp(48px, 5.15vw, 72px);
  font-weight: 500;
  line-height: 0.98;
  letter-spacing: -0.055em;
  text-wrap: balance;
}

.hero-description {
  max-width: 475px;
  margin: 0;
  color: var(--ink-secondary);
  font-size: clamp(17px, 1.5vw, 18px);
  line-height: 1.75;
  letter-spacing: -0.01em;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px;
  margin-top: 32px;
}

.hero-actions .primary-button,
.hero-actions .secondary-button {
  min-height: 48px;
  padding: 0 21px;
  font-size: 16px;
}

.course-stats {
  display: flex;
  flex-wrap: wrap;
  gap: 19px;
  margin-top: 31px;
  color: var(--ink-secondary);
  font-size: 13px;
}

.stats-item {
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.stats-item svg {
  width: 15px;
  height: 15px;
  color: var(--ink-tertiary);
}

.product-demo {
  min-width: 0;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--radius-xl);
  background: var(--white);
  box-shadow: 0 28px 60px -37px rgb(0 0 0 / 29%), 0 8px 19px -12px rgb(0 0 0 / 15%);
}

.demo-topbar {
  display: flex;
  height: 45px;
  align-items: center;
  gap: 8px;
  padding: 0 14px;
  border-bottom: 1px solid var(--line);
  background: var(--surface-secondary);
  color: var(--ink-secondary);
  font-size: 12px;
}

.traffic-lights,
.window-controls {
  display: inline-flex;
  gap: 6px;
  margin-right: 8px;
}

.traffic-lights span,
.window-controls span,
.traffic-light {
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: #ff635c;
}

.traffic-lights span:nth-child(2),
.window-controls span:nth-child(2) {
  background: #febc2e;
}

.traffic-lights span:nth-child(3),
.window-controls span:nth-child(3) {
  background: #28c840;
}

.demo-body {
  display: grid;
  min-height: 420px;
  grid-template-columns: minmax(148px, 29%) minmax(0, 1fr);
}

.demo-sidebar {
  padding: 18px 13px;
  border-right: 1px solid var(--line);
  background: var(--surface-secondary);
  color: var(--ink-secondary);
  font-size: 12px;
}

.demo-sidebar h3,
.demo-sidebar strong {
  display: block;
  margin: 0 0 12px;
  color: var(--ink);
  font-size: 12px;
  font-weight: 600;
}

.demo-sidebar-item,
.demo-sidebar a,
.demo-sidebar button {
  display: flex;
  min-height: 30px;
  align-items: center;
  gap: 7px;
  padding: 5px 7px;
  border: 0;
  border-radius: 6px;
  background: transparent;
  color: inherit;
  font-size: 11px;
}

.demo-sidebar .active,
.demo-sidebar-item.active {
  background: var(--surface-active);
  color: var(--ink);
}

.demo-sidebar svg {
  width: 13px;
  height: 13px;
  flex: 0 0 auto;
}

.demo-conversation {
  display: flex;
  min-width: 0;
  flex-direction: column;
  justify-content: center;
  gap: 14px;
  padding: 28px 22px 20px;
}

.demo-message {
  max-width: 96%;
  padding: 11px 13px;
  border-radius: var(--radius-lg);
  background: var(--surface-secondary);
  font-size: 12px;
  line-height: 1.5;
}

.demo-message.user,
.demo-message.user-message {
  align-self: flex-end;
  background: var(--surface-active);
}

.demo-message.assistant,
.demo-message.assistant-message {
  background: transparent;
}

.demo-message strong {
  font-weight: 600;
}

.demo-composer {
  display: flex;
  min-height: 39px;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  margin-top: auto;
  padding: 0 12px;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius-lg);
  color: var(--ink-tertiary);
  font-size: 11px;
}

.tracks-section,
.course-section {
  padding: 76px 0 90px;
  border-top: 1px solid var(--line);
}

.section-heading {
  max-width: 680px;
  margin-bottom: 32px;
}

.section-heading h2,
.course-section > h2,
.tracks-section > h2,
.work-banner h2 {
  margin: 0 0 10px;
  font-size: clamp(30px, 4vw, 48px);
  font-weight: 500;
  line-height: 1.08;
  letter-spacing: -0.045em;
}

.section-heading p,
.course-section > p,
.work-banner p {
  margin: 0;
  color: var(--ink-secondary);
  font-size: 16px;
  line-height: 1.65;
}

.track-grid,
.curriculum-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 17px;
}

.track-card,
.curriculum-card {
  position: relative;
  min-width: 0;
  padding: 24px;
  border: 1px solid var(--line);
  border-radius: var(--radius-xl);
  background: var(--white);
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast), transform var(--transition-fast);
}

.track-card:hover,
.curriculum-card:hover {
  transform: translateY(-2px);
  border-color: var(--line-strong);
  box-shadow: var(--shadow-soft);
}

.track-card.featured,
.track-card.active {
  border-color: rgb(13 13 13 / 17%);
  background: var(--surface-secondary);
}

.track-icon {
  display: inline-grid;
  width: 38px;
  height: 38px;
  margin-bottom: 17px;
  place-items: center;
  border-radius: var(--radius-md);
  background: var(--surface-tertiary);
}

.track-icon svg {
  width: 19px;
  height: 19px;
}

.track-card h3,
.curriculum-card h3 {
  margin: 0 0 7px;
  font-size: 16px;
  font-weight: 500;
  letter-spacing: -0.01em;
}

.track-card p,
.curriculum-card p {
  margin: 0;
  color: var(--ink-secondary);
  font-size: 14px;
  line-height: 1.6;
}

.track-card .primary-button,
.track-card .secondary-button {
  min-height: 36px;
  margin-top: 19px;
  font-size: 13px;
}

.tag,
.pill,
.badge,
.status-pill {
  display: inline-flex;
  min-height: 23px;
  align-items: center;
  gap: 5px;
  padding: 2px 9px;
  border-radius: 999px;
  background: var(--surface-tertiary);
  color: var(--ink-secondary);
  font-size: 11px;
  font-weight: 500;
  line-height: 1.3;
}

.tag.success,
.pill.success,
.badge.success,
.status-pill.success,
.status-pill.complete {
  background: var(--green-soft);
  color: var(--green);
}

.tag.warning,
.pill.warning,
.badge.warning,
.status-pill.warning {
  background: var(--amber-soft);
  color: var(--amber);
}

.tag.info,
.pill.info,
.badge.info,
.status-pill.info {
  background: #edf5ff;
  color: #156ac0;
}

.curriculum-card {
  min-height: 162px;
}

.curriculum-number,
.lesson-number,
.card-number {
  display: inline-flex;
  margin-bottom: 13px;
  color: var(--ink-tertiary);
  font-family: var(--font-mono);
  font-size: 11px;
}

.curriculum-card .tag,
.curriculum-card .pill {
  margin-top: 14px;
}

.work-banner {
  display: flex;
  min-height: 190px;
  align-items: center;
  justify-content: space-between;
  gap: 30px;
  margin-bottom: 80px;
  padding: 34px 38px;
  border-radius: var(--radius-xl);
  background: var(--surface-secondary);
}

.work-banner h2 {
  font-size: 34px;
}

.site-footer {
  display: flex;
  min-height: 78px;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  border-top: 1px solid var(--line);
  color: var(--ink-secondary);
  font-size: 14px;
}

.site-footer nav,
.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: 18px;
}

.site-footer a:hover {
  color: var(--ink);
}

.lab-shell {
  position: fixed;
  z-index: 40;
  inset: 0;
  display: grid;
  min-width: 340px;
  grid-template-rows: var(--header-height) minmax(0, 1fr);
  overflow: hidden;
  background: var(--white);
}

.lab-header {
  display: grid;
  min-width: 0;
  grid-template-columns: minmax(180px, 1fr) minmax(190px, 350px) minmax(150px, 1fr);
  align-items: center;
  gap: 20px;
  padding: 0 21px;
  border-bottom: 1px solid var(--line);
  background: var(--white);
}

.lab-brand {
  overflow: hidden;
  font-size: 14px;
  white-space: nowrap;
}

.lab-progress {
  display: flex;
  min-width: 0;
  align-items: center;
  gap: 12px;
  color: var(--ink-secondary);
  font-size: 12px;
  white-space: nowrap;
}

.progress-bar,
.lab-progress-track {
  height: 5px;
  flex: 1 1 auto;
  overflow: hidden;
  border-radius: 999px;
  background: var(--surface-active);
}

.progress-fill,
.lab-progress-fill {
  width: 0;
  height: 100%;
  border-radius: inherit;
  background: var(--button-dark);
  transition: width 300ms ease;
}

.lab-header-actions {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 8px;
}

.lab-main {
  display: grid;
  min-width: 0;
  min-height: 0;
  grid-template-columns: minmax(360px, 0.87fr) minmax(530px, 1.13fr);
  overflow: hidden;
}

.lesson-panel {
  display: flex;
  min-width: 0;
  min-height: 0;
  flex-direction: column;
  border-right: 1px solid var(--line);
  background: var(--white);
}

.lesson-scroll {
  min-height: 0;
  flex: 1 1 auto;
  padding: 40px clamp(24px, 5.1vw, 72px) 36px;
  overflow-y: auto;
  overscroll-behavior: contain;
}

.lesson-kicker {
  margin-bottom: 15px;
  font-size: 12px;
}

.lesson-title {
  margin: 0 0 13px;
  font-size: clamp(31px, 3.55vw, 47px);
  font-weight: 500;
  line-height: 1.08;
  letter-spacing: -0.056em;
  text-wrap: balance;
}

.lesson-description {
  margin: 0 0 26px;
  color: var(--ink-secondary);
  font-size: 15px;
  line-height: 1.7;
}

.lesson-scroll h3,
.lesson-scroll h4 {
  margin: 25px 0 9px;
  font-size: 14px;
  font-weight: 600;
}

.lesson-scroll > p,
.lesson-scroll > ul,
.lesson-scroll > ol {
  color: var(--ink-secondary);
  font-size: 14px;
  line-height: 1.7;
}

.concept-card,
.instruction-card,
.prompt-card {
  margin: 18px 0;
  padding: 15px 17px;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  background: var(--white);
}

.concept-card {
  border-color: transparent;
  background: var(--surface-secondary);
}

.instruction-card {
  border-color: rgb(2 133 255 / 15%);
  background: #f6faff;
}

.prompt-card {
  border-color: rgb(13 13 13 / 12%);
  background: var(--white);
}

.concept-card h3,
.instruction-card h3,
.prompt-card h3,
.concept-card h4,
.instruction-card h4,
.prompt-card h4 {
  margin: 0 0 7px;
  color: var(--ink);
  font-size: 13px;
  font-weight: 600;
}

.concept-card p,
.instruction-card p,
.prompt-card p {
  margin: 0;
  color: var(--ink-secondary);
  font-size: 13px;
  line-height: 1.6;
}

.concept-card p + p,
.instruction-card p + p,
.prompt-card p + p {
  margin-top: 9px;
}

.prompt-card code,
.instruction-card code,
.lesson-scroll code {
  padding: 2px 5px;
  border-radius: 4px;
  background: var(--surface-tertiary);
  color: var(--ink);
  font-family: var(--font-mono);
  font-size: 0.89em;
}

.prompt-card pre,
.instruction-card pre {
  margin: 9px 0 0;
  white-space: pre-wrap;
}

.prompt-card pre code,
.instruction-card pre code {
  padding: 0;
  background: transparent;
  line-height: 1.7;
}

.lesson-footer {
  display: flex;
  min-height: 76px;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 14px 22px;
  border-top: 1px solid var(--line);
  background: var(--white);
}

.lesson-footer .primary-button,
.lesson-footer .secondary-button,
.lesson-footer .ghost-button {
  min-height: 39px;
  font-size: 13px;
}

.workspace-panel {
  display: grid;
  min-width: 0;
  min-height: 0;
  grid-template-rows: 53px minmax(0, 1fr);
  background: var(--surface-secondary);
}

.workspace-toolbar {
  display: flex;
  min-width: 0;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 0 15px;
  border-bottom: 1px solid var(--line);
  background: var(--white);
}

.workspace-tabs {
  display: flex;
  min-width: 0;
  height: 100%;
  align-items: stretch;
  gap: 3px;
  overflow-x: auto;
  scrollbar-width: none;
}

.workspace-tabs::-webkit-scrollbar {
  display: none;
}

.workspace-tabs button,
.workspace-tab {
  position: relative;
  display: inline-flex;
  min-width: fit-content;
  align-items: center;
  gap: 6px;
  padding: 0 11px;
  border: 0;
  background: transparent;
  color: var(--ink-secondary);
  font-size: 12px;
  font-weight: 500;
}

.workspace-tabs button:hover,
.workspace-tab:hover {
  color: var(--ink);
}

.workspace-tabs button.active,
.workspace-tabs button[aria-selected="true"],
.workspace-tab.active {
  color: var(--ink);
}

.workspace-tabs button.active::after,
.workspace-tabs button[aria-selected="true"]::after,
.workspace-tab.active::after {
  position: absolute;
  right: 10px;
  bottom: 0;
  left: 10px;
  height: 2px;
  background: var(--button-dark);
  content: "";
}

.workspace-tabs svg,
.workspace-toolbar svg {
  width: 15px;
  height: 15px;
}

.workspace-body {
  display: grid;
  min-width: 0;
  min-height: 0;
  grid-template-columns: minmax(250px, 1fr) minmax(290px, 1.06fr);
  overflow: hidden;
}

.workspace-content {
  min-width: 0;
  min-height: 0;
  overflow: auto;
  background: var(--white);
  overscroll-behavior: contain;
}

.workspace-empty {
  display: grid;
  min-height: 100%;
  padding: 32px 24px;
  place-content: center;
  color: var(--ink-secondary);
  text-align: center;
}

.workspace-empty svg {
  width: 35px;
  height: 35px;
  margin: 0 auto 13px;
  color: var(--ink-tertiary);
}

.workspace-empty h3 {
  margin: 0 0 6px;
  color: var(--ink);
  font-size: 14px;
}

.workspace-empty p {
  max-width: 230px;
  margin: 0;
  font-size: 12px;
  line-height: 1.65;
}

.codex-panel {
  display: grid;
  min-width: 0;
  min-height: 0;
  grid-template-rows: minmax(0, 1fr) auto;
  border-left: 1px solid var(--line);
  background: var(--white);
}

.codex-messages {
  display: flex;
  min-height: 0;
  flex-direction: column;
  gap: 17px;
  padding: 22px 17px;
  overflow-y: auto;
  overscroll-behavior: contain;
}

.message {
  display: flex;
  min-width: 0;
  align-items: flex-start;
  gap: 10px;
  animation: message-in 180ms ease both;
}

.message-avatar {
  display: grid;
  width: 26px;
  height: 26px;
  flex: 0 0 auto;
  place-items: center;
  border: 1px solid var(--line);
  border-radius: 50%;
  background: var(--white);
  color: var(--ink);
  font-size: 11px;
  font-weight: 600;
}

.message-avatar svg,
.message-avatar img {
  width: 15px;
  height: 15px;
}

.message-body {
  min-width: 0;
  flex: 1 1 auto;
  color: var(--ink);
  font-size: 12px;
  line-height: 1.7;
  overflow-wrap: anywhere;
}

.message-body p {
  margin: 0 0 9px;
}

.message-body p:last-child {
  margin-bottom: 0;
}

.message-body strong {
  font-weight: 600;
}

.message-body ul,
.message-body ol {
  margin: 7px 0;
  padding-left: 19px;
}

.message-body li + li {
  margin-top: 4px;
}

.message-body code {
  padding: 1px 4px;
  border-radius: 4px;
  background: var(--surface-tertiary);
  font-family: var(--font-mono);
  font-size: 11px;
}

.message-body .codex-markdown-inline-code {
  padding: 0 .1em;
  font-size: .94em;
  line-height: inherit;
  vertical-align: baseline;
}

.message-body pre {
  padding: 10px;
  overflow-x: auto;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  background: var(--surface-secondary);
}

.message-body pre code {
  padding: 0;
  background: transparent;
}

.user-message {
  align-self: flex-end;
}

.user-message .message-body {
  max-width: 260px;
  padding: 9px 11px;
  border-radius: 13px 13px 3px 13px;
  background: var(--surface-tertiary);
}

.user-message .message-avatar {
  display: none;
}

.assistant-message .message-avatar {
  border-color: rgb(13 13 13 / 12%);
}

.system-event {
  display: flex;
  min-width: 0;
  align-items: flex-start;
  gap: 7px;
  padding: 8px 10px;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  background: var(--surface-secondary);
  color: var(--ink-secondary);
  font-family: var(--font-mono);
  font-size: 10px;
  line-height: 1.55;
  overflow-wrap: anywhere;
}

.system-event svg {
  width: 13px;
  height: 13px;
  flex: 0 0 auto;
}

.system-event.success {
  border-color: rgb(0 143 69 / 13%);
  background: var(--green-soft);
  color: var(--green);
}

.system-event.error {
  border-color: rgb(206 53 49 / 13%);
  background: var(--red-soft);
  color: var(--red);
}

.composer {
  display: flex;
  min-height: 69px;
  align-items: flex-end;
  gap: 9px;
  padding: 10px 11px 11px;
  border-top: 1px solid var(--line);
  background: var(--white);
}

.composer-input {
  min-width: 0;
  min-height: 39px;
  max-height: 110px;
  flex: 1 1 auto;
  padding: 9px 11px;
  resize: none;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius-md);
  background: var(--white);
  font-size: 12px;
  line-height: 1.45;
}

.composer-input::placeholder {
  color: var(--ink-tertiary);
}

.composer-input:focus {
  border-color: rgb(13 13 13 / 28%);
  outline: none;
}

.send-button {
  display: inline-grid;
  width: 38px;
  height: 38px;
  flex: 0 0 auto;
  place-items: center;
  border: 0;
  border-radius: var(--radius-md);
  background: var(--button-dark);
  color: var(--white);
  transition: background var(--transition-fast);
}

.send-button:hover {
  background: #393939;
}

.send-button svg {
  width: 16px;
  height: 16px;
}

.file-tree {
  padding: 17px 11px;
  font-family: var(--font-mono);
  font-size: 11px;
}

.file-tree h3,
.file-tree-heading {
  margin: 0 0 11px;
  padding-left: 8px;
  color: var(--ink-secondary);
  font-family: var(--font-sans);
  font-size: 11px;
  font-weight: 600;
}

.file-entry {
  display: flex;
  min-width: 0;
  min-height: 28px;
  align-items: center;
  gap: 7px;
  padding: 4px 8px;
  border: 0;
  border-radius: 6px;
  background: transparent;
  color: var(--ink-secondary);
  text-align: left;
}

button.file-entry {
  width: 100%;
}

.file-entry:hover,
.file-entry.active,
.file-entry[aria-current="true"] {
  background: var(--surface-tertiary);
  color: var(--ink);
}

.file-entry.folder {
  color: var(--ink);
  font-weight: 500;
}

.file-entry.indent,
.file-entry[data-depth="1"] {
  padding-left: 22px;
}

.file-entry[data-depth="2"] {
  padding-left: 37px;
}

.file-entry[data-depth="3"] {
  padding-left: 52px;
}

.file-entry svg {
  width: 13px;
  height: 13px;
  flex: 0 0 auto;
  color: var(--ink-tertiary);
}

.file-entry .file-status {
  margin-left: auto;
  color: var(--green);
  font-size: 10px;
}

.code-view {
  min-width: max-content;
  padding: 12px 0 20px;
  font-family: var(--font-mono);
  font-size: 11px;
  line-height: 1.75;
}

.code-header,
.file-header,
.diff-header {
  display: flex;
  min-height: 41px;
  align-items: center;
  gap: 8px;
  padding: 0 13px;
  border-bottom: 1px solid var(--line);
  color: var(--ink-secondary);
  font-family: var(--font-mono);
  font-size: 11px;
}

.code-line,
.diff-row {
  display: flex;
  min-height: 20px;
  align-items: baseline;
  padding: 0 12px 0 0;
  white-space: pre;
}

.line-number {
  min-width: 38px;
  flex: 0 0 38px;
  padding-right: 10px;
  color: var(--ink-tertiary);
  text-align: right;
  user-select: none;
}

.diff-row .line-number {
  min-width: 31px;
  flex-basis: 31px;
  padding-right: 6px;
}

.diff-added {
  background: #eaf8ee;
  color: #146433;
}

.diff-removed {
  background: #fff0ef;
  color: #a9312d;
}

.code-keyword,
.syntax-keyword {
  color: #8250df;
}

.code-string,
.syntax-string {
  color: #086641;
}

.code-comment,
.syntax-comment {
  color: #8a8a8a;
}

.code-function,
.syntax-function {
  color: #146ab8;
}

.linear-card,
.plan-card,
.test-results,
.pr-card,
.success-banner,
.preview-panel,
.account-preview,
.alert-banner {
  margin: 15px;
  padding: 15px;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  background: var(--white);
}

.linear-card h3,
.plan-card h3,
.test-results h3,
.pr-card h3,
.preview-panel h3,
.account-preview h3 {
  margin: 0 0 7px;
  color: var(--ink);
  font-size: 14px;
  font-weight: 600;
  letter-spacing: -0.02em;
}

.linear-card p,
.plan-card p,
.test-results p,
.pr-card p,
.preview-panel p,
.account-preview p {
  margin: 0 0 9px;
  color: var(--ink-secondary);
  font-size: 12px;
  line-height: 1.6;
}

.linear-card p:last-child,
.plan-card p:last-child,
.test-results p:last-child,
.pr-card p:last-child,
.preview-panel p:last-child,
.account-preview p:last-child {
  margin-bottom: 0;
}

.linear-key,
.issue-key,
.pr-branch {
  display: inline-flex;
  margin-bottom: 7px;
  color: #1769c2;
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 500;
}

.linear-card .tag,
.linear-card .pill,
.pr-card .tag,
.pr-card .pill {
  margin: 5px 5px 0 0;
}

.linear-meta,
.pr-meta,
.card-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 9px;
  margin-top: 12px;
  color: var(--ink-secondary);
  font-size: 11px;
}

.plan-card ol,
.plan-card ul,
.test-results ul,
.pr-card ul,
.checklist {
  margin: 10px 0 0;
  padding-left: 18px;
  color: var(--ink-secondary);
  font-size: 12px;
  line-height: 1.65;
}

.plan-card li + li,
.test-results li + li,
.pr-card li + li,
.checklist li + li {
  margin-top: 7px;
}

.plan-card li::marker {
  color: var(--ink-tertiary);
  font-weight: 600;
}

.test-results {
  font-family: var(--font-mono);
  font-size: 11px;
}

.test-results h3 {
  font-family: var(--font-sans);
}

.test-pass,
.test-passed,
.check-pass,
.success-text {
  color: var(--green);
}

.test-fail,
.test-failed,
.check-fail,
.error-text {
  color: var(--red);
}

.test-summary {
  margin-top: 12px;
  padding-top: 10px;
  border-top: 1px solid var(--line);
}

.success-banner {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  border-color: rgb(0 143 69 / 16%);
  background: var(--green-soft);
  color: var(--green);
  font-size: 12px;
}

.success-banner svg {
  width: 17px;
  height: 17px;
  flex: 0 0 auto;
}

.success-banner h3,
.success-banner p {
  margin: 0;
}

.success-banner h3 {
  font-size: 13px;
}

.success-banner p {
  margin-top: 3px;
  font-size: 12px;
}

.preview-panel {
  padding: 0;
  overflow: hidden;
}

.preview-topbar {
  display: flex;
  min-height: 37px;
  align-items: center;
  justify-content: space-between;
  padding: 0 12px;
  border-bottom: 1px solid var(--line);
  background: var(--surface-secondary);
  color: var(--ink-secondary);
  font-size: 10px;
}

.account-preview {
  margin: 14px;
  padding: 15px;
  box-shadow: var(--shadow-soft);
}

.account-balance-amount,
.billing-total,
.price {
  color: var(--ink);
  font-size: 28px;
  font-weight: 500;
  letter-spacing: -0.06em;
}

.billing-row,
.invoice-row {
  display: flex;
  justify-content: space-between;
  gap: 10px;
  padding: 8px 0;
  border-bottom: 1px solid var(--line);
  color: var(--ink-secondary);
  font-size: 11px;
}

.billing-row:last-child,
.invoice-row:last-child {
  border-bottom: 0;
}

.alert-banner {
  display: flex;
  align-items: flex-start;
  gap: 8px;
  margin: 12px 0 0;
  padding: 10px 11px;
  border-color: rgb(150 96 24 / 17%);
  background: var(--amber-soft);
  color: var(--amber);
  font-size: 11px;
  line-height: 1.5;
}

.alert-banner.success {
  border-color: rgb(0 143 69 / 15%);
  background: var(--green-soft);
  color: var(--green);
}

.alert-banner svg {
  width: 15px;
  height: 15px;
  flex: 0 0 auto;
}

.mobile-switcher {
  display: none;
}

.demo-topbar-status {
  margin-left: auto;
  color: var(--ink-tertiary);
  font-size: 10px;
}

.demo-sidebar-label {
  display: block;
  margin: 17px 7px 5px;
  color: var(--ink-tertiary);
  font-size: 10px;
  font-weight: 500;
}

.demo-issue {
  padding-left: 26px;
  color: var(--ink-tertiary);
  font-family: var(--font-mono);
}

.demo-assistant-label {
  display: flex;
  align-items: center;
  gap: 6px;
  margin-bottom: 8px;
  font-size: 11px;
  font-weight: 600;
}

.demo-assistant-label svg {
  width: 15px;
  height: 15px;
}

.demo-message.assistant p {
  margin: 0 0 11px;
  color: var(--ink-secondary);
}

.demo-file-change {
  display: flex;
  justify-content: space-between;
  gap: 10px;
  padding: 5px 0;
  border-top: 1px solid var(--line);
  font-family: var(--font-mono);
  font-size: 10px;
}

.demo-file-change span:last-child {
  color: var(--green);
}

.demo-check {
  display: flex;
  align-items: center;
  gap: 5px;
  margin-top: 9px;
  color: var(--green);
  font-size: 10px;
}

.demo-check svg {
  width: 13px;
  height: 13px;
}

.curriculum-card {
  display: flex;
  min-height: 207px;
  flex-direction: column;
}

.curriculum-card .tag {
  width: fit-content;
  margin-top: auto;
  transform: translateY(4px);
}

.curriculum-icon {
  position: absolute;
  top: 20px;
  right: 19px;
  display: grid;
  width: 31px;
  height: 31px;
  place-items: center;
  border-radius: var(--radius-sm);
  background: var(--surface-secondary);
  color: var(--ink-secondary);
}

.curriculum-icon svg {
  width: 16px;
  height: 16px;
}

.site-footer > span {
  display: flex;
  align-items: center;
  gap: 8px;
}

.footer-mark {
  width: 19px;
  height: 19px;
  color: var(--ink);
}

.prompt-heading {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  margin-bottom: 8px;
}

.prompt-heading h3 {
  margin: 0;
}

.prompt-copy {
  flex: 0 0 auto;
  padding: 4px 7px;
  border: 0;
  border-radius: 6px;
  background: var(--surface-tertiary);
  color: var(--ink);
  font-size: 10px;
  font-weight: 500;
  transition: background var(--transition-fast);
}

.prompt-copy:hover {
  background: var(--surface-active);
}

.lesson-checklist {
  padding-left: 17px;
}

.simulation-note {
  display: flex;
  align-items: flex-start;
  gap: 7px;
  margin: 16px 0 0;
  color: var(--ink-secondary);
  font-size: 11px !important;
  line-height: 1.6 !important;
}

.simulation-note svg {
  width: 14px;
  height: 14px;
  margin-top: 2px;
  color: var(--ink-tertiary);
}

.lesson-complete {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  margin-top: 19px;
  padding: 12px 13px;
  border: 1px solid rgb(0 143 69 / 15%);
  border-radius: var(--radius-lg);
  background: var(--green-soft);
  color: var(--green);
}

.lesson-complete > svg {
  width: 17px;
  height: 17px;
  margin-top: 1px;
}

.lesson-complete strong,
.lesson-complete span {
  display: block;
}

.lesson-complete strong {
  font-size: 12px;
  font-weight: 600;
}

.lesson-complete span {
  margin-top: 3px;
  font-size: 11px;
  line-height: 1.55;
}

.course-completion {
  margin-top: 21px;
  padding: 18px;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  background: var(--surface-secondary);
}

.course-completion h3 {
  margin: 0 0 7px;
  font-size: 15px;
}

.course-completion p {
  margin: 0;
  color: var(--ink-secondary);
  font-size: 12px;
  line-height: 1.6;
}

.restart-button {
  margin-top: 13px;
  padding: 0 0 2px;
  border: 0;
  border-bottom: 1px solid var(--ink);
  background: transparent;
  font-size: 12px;
  font-weight: 500;
}

.sandbox-pill {
  background: var(--surface-secondary);
  white-space: nowrap;
}

.workspace-repo {
  display: inline-flex;
  flex: 0 0 auto;
  align-items: center;
  gap: 5px;
  color: var(--ink-secondary);
  font-size: 11px;
}

.workspace-repo svg {
  width: 14px;
  height: 14px;
}

.mode-toggle {
  display: inline-flex;
  height: 38px;
  flex: 0 0 auto;
  align-items: center;
  gap: 4px;
  padding: 0 8px;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius-md);
  background: var(--white);
  color: var(--ink-secondary);
  font-size: 11px;
}

.mode-toggle svg {
  width: 14px;
  height: 14px;
}

.mode-toggle.active {
  border-color: rgb(116 65 196 / 24%);
  background: var(--purple-soft);
  color: var(--purple);
}

.composer-validation {
  margin: 0;
  padding: 0 12px 10px;
  background: var(--white);
  color: var(--red);
  font-size: 10px;
  line-height: 1.5;
}

.artifact-intro {
  padding: 24px 17px 8px;
}

.artifact-eyebrow {
  color: var(--ink-tertiary);
  font-size: 10px;
  font-weight: 500;
}

.artifact-intro h2 {
  margin: 7px 0 5px;
  font-size: 22px;
  font-weight: 500;
  line-height: 1.13;
  letter-spacing: -0.045em;
}

.artifact-intro p {
  margin: 0;
  color: var(--ink-secondary);
  font-size: 12px;
  line-height: 1.55;
}

.integration-card {
  margin: 13px 15px 15px;
  padding: 15px;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  box-shadow: 0 3px 8px rgb(0 0 0 / 3%);
}

.integration-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  margin-bottom: 13px;
}

.integration-logo {
  display: grid;
  width: 35px;
  height: 35px;
  place-items: center;
  border-radius: var(--radius-sm);
  background: #eaf1ff;
  color: #1868db;
  font-size: 19px;
  font-weight: 600;
}

.integration-card h3 {
  margin: 0 0 4px;
  font-size: 14px;
  font-weight: 600;
}

.integration-card > p {
  margin: 0;
  color: var(--ink-secondary);
  font-size: 11px;
}

.integration-scope {
  display: flex;
  align-items: center;
  gap: 5px;
  margin: 12px 0 13px;
  color: var(--ink-secondary);
  font-size: 10px;
}

.integration-scope svg,
.integration-connected svg {
  width: 13px;
  height: 13px;
}

.integration-connected {
  display: flex;
  align-items: center;
  gap: 5px;
  color: var(--green);
  font-size: 11px;
  font-weight: 500;
}

.integration-issue {
  margin-top: 0;
}

.artifact-disclaimer {
  display: flex;
  align-items: flex-start;
  gap: 6px;
  margin: 17px 16px;
  color: var(--ink-tertiary);
  font-size: 10px;
  line-height: 1.55;
}

.artifact-disclaimer svg {
  width: 13px;
  height: 13px;
  margin-top: 1px;
}

.issue-breadcrumb {
  display: flex;
  align-items: center;
  gap: 5px;
  padding: 16px 16px 0;
  color: var(--ink-secondary);
  font-size: 10px;
}

.issue-breadcrumb svg {
  width: 12px;
  height: 12px;
}

.issue-details {
  padding: 15px;
}

.issue-topline {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  margin-bottom: 9px;
}

.issue-topline .linear-key {
  margin-bottom: 0;
}

.issue-details > h3 {
  font-size: 16px;
  line-height: 1.35;
}

.issue-section {
  margin-top: 17px;
}

.issue-section h4 {
  margin: 0 0 6px;
  font-size: 11px;
  font-weight: 600;
}

.issue-criteria {
  margin: 7px 0 0;
  padding-left: 17px;
  color: var(--ink-secondary);
  font-size: 11px;
  line-height: 1.6;
}

.issue-criteria li + li {
  margin-top: 6px;
}

.issue-labels {
  display: flex;
  flex-wrap: wrap;
  gap: 5px;
  margin-top: 14px;
}

.issue-labels .tag {
  margin: 0;
}

.file-modified-badge {
  margin-left: auto;
  color: var(--amber);
  font-family: var(--font-sans);
  font-size: 10px;
}

.plan-topline {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 7px;
  margin-bottom: 12px;
}

.plan-issue {
  color: #1769c2;
  font-family: var(--font-mono);
  font-size: 10px;
}

.plan-files {
  display: grid;
  gap: 7px;
  margin-top: 17px;
  padding-top: 12px;
  border-top: 1px solid var(--line);
}

.plan-files h4 {
  margin: 0 0 2px;
  font-size: 11px;
  font-weight: 600;
}

.plan-files > span {
  display: flex;
  align-items: center;
  gap: 6px;
  color: var(--ink-secondary);
  font-family: var(--font-mono);
  font-size: 10px;
}

.plan-files > span svg {
  width: 12px;
  height: 12px;
}

.plan-approval {
  display: flex;
  align-items: center;
  gap: 6px;
  margin-top: 16px;
  color: var(--green);
  font-size: 10px;
  font-weight: 500;
}

.plan-approval svg {
  width: 14px;
  height: 14px;
}

.plan-empty .pill {
  width: fit-content;
  margin: 11px auto 0;
}

.preview-topbar > span {
  display: inline-flex;
  align-items: center;
  gap: 5px;
}

.preview-topbar > span svg {
  width: 12px;
  height: 12px;
}

.account-eyebrow {
  display: inline-flex;
  margin-bottom: 10px;
  color: var(--ink-tertiary);
  font-size: 10px;
}

.account-preview h3 {
  margin-bottom: 2px;
}

.account-preview .account-balance-amount {
  margin: 8px 0 0;
}

.balance-track {
  height: 8px;
  margin: 14px 0 5px;
  overflow: hidden;
  border-radius: 999px;
  background: var(--surface-active);
}

.balance-fill {
  display: block;
  height: 100%;
  border-radius: inherit;
  background: #1769c2;
  transition: width 180ms ease, background 180ms ease;
}

.balance-fill.warning {
  background: #bd821b;
}

.balance-fill.overdrawn {
  background: var(--red);
}

.alert-banner.overdrawn {
  border-color: rgb(206 53 49 / 15%);
  background: var(--red-soft);
  color: var(--red);
}

.transfer-link {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  margin-top: 15px;
  color: #1769c2;
  font-size: 11px;
  font-weight: 500;
}

.transfer-link svg {
  width: 13px;
  height: 13px;
}

.balance-control {
  padding: 4px 15px 15px;
}

.balance-control label {
  display: block;
  margin-bottom: 8px;
  color: var(--ink-secondary);
  font-size: 10px;
  font-weight: 500;
}

.balance-control input[type="range"] {
  width: 100%;
  height: 16px;
  margin: 0;
  accent-color: var(--button-dark);
}

.balance-markers {
  display: flex;
  justify-content: space-between;
  margin-top: 2px;
  color: var(--ink-tertiary);
  font-family: var(--font-mono);
  font-size: 9px;
}

.preview-note {
  display: flex;
  align-items: flex-start;
  gap: 6px;
  margin: 0 16px 17px;
  color: var(--ink-secondary);
  font-size: 10px;
  line-height: 1.55;
}

.preview-note svg {
  width: 13px;
  height: 13px;
  margin-top: 1px;
}

.diff-summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  padding: 15px 13px 12px;
  border-bottom: 1px solid var(--line);
}

.diff-summary > div {
  display: grid;
  gap: 4px;
}

.diff-summary strong {
  font-size: 12px;
  font-weight: 600;
}

.diff-summary > div > span {
  font-family: var(--font-mono);
  font-size: 10px;
}

.diff-summary b {
  color: var(--green);
  font-weight: 500;
}

.diff-summary i {
  color: var(--red);
  font-style: normal;
}

.diff-file-tabs {
  display: grid;
  gap: 2px;
  padding: 9px 8px;
  border-bottom: 1px solid var(--line);
}

.diff-file {
  display: flex;
  min-width: 0;
  min-height: 30px;
  align-items: center;
  gap: 6px;
  padding: 5px 6px;
  border: 0;
  border-radius: 6px;
  background: transparent;
  color: var(--ink-secondary);
  font-family: var(--font-mono);
  font-size: 10px;
  text-align: left;
}

.diff-file:hover,
.diff-file.active {
  background: var(--surface-tertiary);
  color: var(--ink);
}

.diff-file svg {
  width: 13px;
  height: 13px;
}

.diff-file > span:not(.diff-file-state) {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.diff-file-state {
  margin-left: auto;
  color: var(--amber);
  font-size: 9px;
}

.diff-hunk {
  padding: 4px 9px;
  background: #eef5ff;
  color: #46698e;
  font-size: 10px;
  white-space: pre;
}

.terminal-header {
  display: flex;
  min-height: 44px;
  align-items: center;
  gap: 7px;
  padding: 0 13px;
  border-bottom: 1px solid var(--line);
  font-size: 12px;
  font-weight: 500;
}

.terminal-header > svg {
  width: 15px;
  height: 15px;
}

.terminal-header .pill {
  margin-left: auto;
}

.terminal-screen {
  min-height: 140px;
  padding: 15px 12px;
  overflow-x: auto;
  background: #1d1e1e;
  color: #e7e7e7;
  font-family: var(--font-mono);
  font-size: 10px;
  line-height: 1.75;
}

.terminal-line {
  min-height: 17px;
  white-space: pre-wrap;
  overflow-wrap: anywhere;
}

.terminal-command {
  margin-top: 5px;
  color: #a6cbff;
}

.terminal-pass {
  color: #86d8a5;
}

.terminal-success {
  color: #9edbb1;
}

.terminal-muted {
  color: #a1a1a1;
}

.test-heading {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
}

.test-heading h3 {
  margin: 0;
}

.test-summary {
  display: grid;
  gap: 8px;
}

.test-summary > span,
.pr-preflight > span {
  display: flex;
  align-items: center;
  gap: 6px;
  color: var(--green);
  font-family: var(--font-sans);
  font-size: 11px;
}

.test-summary > span svg,
.pr-preflight > span svg {
  width: 14px;
  height: 14px;
}

.pr-empty > svg {
  color: var(--purple);
}

.pr-preflight {
  display: grid;
  gap: 7px;
  width: fit-content;
  margin: 17px auto 0;
  text-align: left;
}

.prepared-pr > .pill {
  margin-bottom: 11px;
}

.prepared-pr > h3 {
  font-size: 15px;
  line-height: 1.4;
}

.pr-section {
  margin-top: 15px;
  padding-top: 12px;
  border-top: 1px solid var(--line);
}

.pr-section h4 {
  margin: 0 0 5px;
  font-size: 11px;
  font-weight: 600;
}

.pr-approval {
  display: grid;
  gap: 10px;
  margin: 15px;
  padding: 15px;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius-lg);
  background: var(--surface-secondary);
}

.pr-approval h3,
.pr-approval h4 {
  margin: 0;
  color: var(--ink);
  font-size: 13px;
  font-weight: 600;
  line-height: 1.4;
}

.pr-approval > p {
  margin: 0;
  color: var(--ink-secondary);
  font-size: 11px;
  line-height: 1.6;
}

.publish-pr-button {
  display: inline-flex;
  min-width: 0;
  min-height: 39px;
  align-items: center;
  justify-content: center;
  gap: 7px;
  padding: 0 12px;
  border: 1px solid transparent;
  border-radius: 999px;
  background: var(--button-dark);
  color: var(--white);
  font-size: 11px;
  font-weight: 500;
  line-height: 1.35;
  text-align: center;
  white-space: normal;
  transition: background var(--transition-fast), transform var(--transition-fast);
}

.publish-pr-button:hover {
  background: #383838;
}

.publish-pr-button:active {
  transform: translateY(1px);
}

.publish-pr-button svg {
  width: 15px;
  height: 15px;
}

.approval-note {
  display: flex;
  min-width: 0;
  align-items: flex-start;
  gap: 6px;
  color: var(--ink-secondary);
  font-size: 10px;
  line-height: 1.55;
}

.approval-note svg {
  width: 13px;
  height: 13px;
  margin-top: 1px;
  color: var(--ink-tertiary);
}

.pr-opened {
  display: flex;
  align-items: flex-start;
  gap: 9px;
  margin: 15px;
  padding: 13px 14px;
  border: 1px solid rgb(0 143 69 / 17%);
  border-radius: var(--radius-lg);
  background: var(--green-soft);
  color: var(--green);
  font-size: 11px;
  line-height: 1.55;
}

.pr-opened > svg {
  width: 17px;
  height: 17px;
  margin-top: 1px;
}

.pr-opened h3,
.pr-opened strong {
  display: block;
  margin: 0;
  font-size: 12px;
  font-weight: 600;
}

.pr-opened p,
.pr-opened span {
  margin: 3px 0 0;
  font-size: 10px;
  line-height: 1.55;
}

.pr-opened a {
  color: inherit;
  text-decoration: underline;
  text-underline-offset: 2px;
}

.conversation-title {
  display: flex;
  min-width: 0;
  align-items: center;
  gap: 7px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--line);
  font-size: 12px;
  font-weight: 600;
}

.conversation-title > svg {
  width: 17px;
  height: 17px;
}

.conversation-badge {
  overflow: hidden;
  margin-left: auto;
  color: var(--ink-tertiary);
  font-size: 9px;
  font-weight: 400;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.thinking-event {
  border-color: rgb(116 65 196 / 12%);
  background: var(--purple-soft);
  color: var(--purple);
}

.thinking-dots {
  display: inline-block;
  margin-left: auto;
  animation: thinking-pulse 1s ease-in-out infinite;
  font-size: 15px;
  line-height: 1;
}

@keyframes thinking-pulse {
  0%,
  100% {
    opacity: 0.4;
  }

  50% {
    opacity: 1;
  }
}

@keyframes message-in {
  from {
    opacity: 0;
    transform: translateY(4px);
  }

  to {
    opacity: 1;
    transform: translateY(0);
  }
}

html[data-theme="dark"] :is(
  .lab-shell,
  .lab-header,
  .lesson-panel,
  .lesson-footer,
  .workspace-toolbar,
  .workspace-content,
  .codex-panel,
  .codex-composer,
  .composer-validation,
  .message-avatar,
  .mode-toggle,
  .top-nav.is-open,
  .top-nav.open,
  .mobile-switcher
) {
  background-color: var(--surface);
}

html[data-theme="dark"] :is(
  .product-demo,
  .track-card,
  .curriculum-card,
  .concept-card,
  .prompt-card,
  .alert-banner,
  .demo-conversation,
  .composer-input,
  .work-banner
) {
  border-color: var(--line);
  background-color: var(--surface-secondary);
}

html[data-theme="dark"] .demo-sidebar {
  background-color: var(--surface);
}

html[data-theme="dark"] :is(.track-card.featured, .track-card.active) {
  border-color: var(--line-strong);
  background-color: var(--surface-tertiary);
}

html[data-theme="dark"] .instruction-card {
  border-color: rgb(51 156 255 / 20%);
  background-color: rgb(51 156 255 / 8%);
}

html[data-theme="dark"] :is(.tag.info, .pill.info, .badge.info, .status-pill.info) {
  background-color: rgb(51 156 255 / 14%);
  color: #a6d4ff;
}

@media (max-width: 1180px) {
  .hero-grid {
    grid-template-columns: minmax(0, 0.88fr) minmax(0, 1.12fr);
    gap: 43px;
  }

  .lab-main {
    grid-template-columns: minmax(325px, 0.79fr) minmax(480px, 1.21fr);
  }

  .lesson-scroll {
    padding-right: 35px;
    padding-left: 35px;
  }

  .workspace-body {
    grid-template-columns: minmax(220px, 0.95fr) minmax(255px, 1.05fr);
  }

  .codex-messages {
    padding-right: 13px;
    padding-left: 13px;
  }
}

@media (max-width: 920px) {
  .header-inner {
    grid-template-columns: 1fr auto;
    padding: 0 20px;
  }

  .top-nav {
    display: none;
  }

  .menu-toggle {
    display: inline-grid;
  }

  .top-nav.is-open,
  .top-nav.open {
    position: absolute;
    top: calc(var(--header-height) - 1px);
    right: 0;
    left: 0;
    display: grid;
    gap: 5px;
    padding: 12px 20px 15px;
    border-bottom: 1px solid var(--line);
    background: var(--surface);
  }

  .top-nav.is-open a,
  .top-nav.open a {
    padding: 9px 10px;
  }

  .hero,
  .tracks-section,
  .course-section,
  .work-banner,
  .site-footer {
    width: min(720px, calc(100% - 60px));
  }

  .hero {
    padding-top: 79px;
    padding-bottom: 82px;
  }

  .hero-grid {
    min-height: 0;
    grid-template-columns: 1fr;
    gap: 45px;
  }

  .hero-title {
    max-width: 610px;
    font-size: clamp(60px, 10vw, 83px);
  }

  .product-demo {
    max-width: 650px;
  }

  .track-grid,
  .curriculum-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .lab-header {
    grid-template-columns: minmax(0, 1fr) auto;
  }

  .lab-progress {
    display: none;
  }

  .lab-main {
    grid-template-columns: minmax(290px, 0.75fr) minmax(385px, 1.25fr);
  }

  .lesson-scroll {
    padding: 32px 25px;
  }

  .lesson-title {
    font-size: 35px;
  }

  .workspace-body {
    display: flex;
    min-width: 0;
    flex-direction: column;
  }

  .workspace-content {
    min-height: 32%;
    flex: 0 1 42%;
    border-bottom: 1px solid var(--line);
  }

  .codex-panel {
    min-height: 52%;
    flex: 1 1 58%;
    border-left: 0;
  }
}

@media (max-width: 690px) {
  .header-inner {
    padding: 0 15px;
  }

  .brand-label {
    font-size: 13px;
  }

  .header-search {
    display: none;
  }

  .header-actions {
    gap: 6px;
  }

  .header-theme {
    width: 34px;
    height: 34px;
    flex-basis: 34px;
  }

  .header-actions .primary-button,
  .header-actions .secondary-button {
    min-height: 34px;
    padding: 0 12px;
    font-size: 12px;
  }

  .hero,
  .tracks-section,
  .course-section,
  .work-banner,
  .site-footer {
    width: calc(100% - 38px);
  }

  .hero {
    padding-top: 65px;
    padding-bottom: 69px;
  }

  .hero-title {
    font-size: clamp(53px, 11.7vw, 70px);
  }

  .hero-description {
    font-size: 17px;
  }

  .hero-grid {
    gap: 34px;
  }

  .demo-body {
    min-height: 335px;
    grid-template-columns: minmax(106px, 28%) minmax(0, 1fr);
  }

  .demo-sidebar {
    padding-right: 8px;
    padding-left: 8px;
  }

  .demo-conversation {
    padding: 19px 12px 13px;
  }

  .demo-message {
    font-size: 11px;
  }

  .tracks-section,
  .course-section {
    padding: 59px 0 64px;
  }

  .track-grid,
  .curriculum-grid {
    grid-template-columns: 1fr;
    gap: 12px;
  }

  .curriculum-card {
    min-height: 0;
  }

  .work-banner {
    min-height: 0;
    flex-direction: column;
    align-items: flex-start;
    gap: 17px;
    margin-bottom: 56px;
    padding: 26px;
  }

  .site-footer {
    min-height: 95px;
    align-items: flex-start;
    flex-direction: column;
    justify-content: center;
    gap: 10px;
  }

  .lab-shell {
    grid-template-rows: 55px 44px minmax(0, 1fr);
  }

  .lab-header {
    grid-template-columns: minmax(0, 1fr) auto;
    gap: 8px;
    padding: 0 12px;
  }

  .lab-brand {
    gap: 7px;
    font-size: 12px;
  }

  .lab-brand svg,
  .lab-brand img {
    width: 21px;
    height: 21px;
  }

  .lab-header .primary-button,
  .lab-header .secondary-button,
  .lab-header .ghost-button {
    min-height: 32px;
    padding: 0 10px;
    font-size: 12px;
  }

  .mobile-switcher {
    display: flex;
    grid-row: 2;
    align-items: stretch;
    justify-content: center;
    gap: 22px;
    border-bottom: 1px solid var(--line);
    background: var(--white);
  }

  .mobile-switcher button {
    position: relative;
    padding: 0 11px;
    border: 0;
    background: transparent;
    color: var(--ink-secondary);
    font-size: 13px;
  }

  .mobile-switcher button.active,
  .mobile-switcher button[aria-selected="true"] {
    color: var(--ink);
  }

  .mobile-switcher button.active::after,
  .mobile-switcher button[aria-selected="true"]::after {
    position: absolute;
    right: 6px;
    bottom: 0;
    left: 6px;
    height: 2px;
    background: var(--button-dark);
    content: "";
  }

  .lab-main {
    grid-row: 3;
    grid-template-columns: 1fr;
  }

  .lesson-panel,
  .workspace-panel {
    grid-column: 1;
    grid-row: 1;
  }

  .lesson-panel {
    border-right: 0;
  }

  .lab-main:not([data-mobile-view="workspace"]) .workspace-panel,
  .lab-main[data-mobile-view="lesson"] .workspace-panel,
  .lab-shell[data-mobile-view="lesson"] .workspace-panel {
    display: none;
  }

  .lab-main[data-mobile-view="workspace"] .lesson-panel,
  .lab-shell[data-mobile-view="workspace"] .lesson-panel {
    display: none;
  }

  .lab-shell[data-mobile-view="workspace"] .workspace-panel,
  .lab-main[data-mobile-view="workspace"] .workspace-panel {
    display: grid;
  }

  .lesson-scroll {
    padding: 31px 24px 26px;
  }

  .lesson-title {
    font-size: 42px;
  }

  .workspace-body {
    display: grid;
    grid-template-columns: minmax(170px, 0.92fr) minmax(185px, 1.08fr);
  }

  .workspace-content {
    min-height: 0;
    border-bottom: 0;
  }

  .codex-panel {
    min-height: 0;
    border-left: 1px solid var(--line);
  }

  .codex-messages {
    gap: 14px;
    padding: 17px 10px;
  }

  .message {
    gap: 7px;
  }

  .message-avatar {
    width: 22px;
    height: 22px;
  }
}

@media (max-width: 440px) {
  .demo-sidebar {
    font-size: 10px;
  }

  .demo-sidebar-item,
  .demo-sidebar a,
  .demo-sidebar button {
    gap: 5px;
    padding-right: 3px;
    padding-left: 3px;
    font-size: 10px;
  }

  .course-stats {
    gap: 12px;
    font-size: 12px;
  }

  .workspace-body {
    display: flex;
    flex-direction: column;
  }

  .workspace-content {
    min-height: 31%;
    flex: 0 1 42%;
    border-bottom: 1px solid var(--line);
  }

  .codex-panel {
    min-height: 52%;
    flex: 1 1 58%;
    border-left: 0;
  }

  .lesson-title {
    font-size: 36px;
  }
}

@media (max-width: 360px) {
  .landing .hero-title {
    font-size: 46px;
    line-height: 1.04;
    letter-spacing: -0.055em;
  }
}

body.hosted-preview-open {
  overflow: hidden;
}

.hosted-preview-overlay[hidden],
.hosted-preview-launcher[hidden] {
  display: none !important;
}

.hosted-preview-launcher {
  position: fixed;
  z-index: 50;
  right: 108px;
  bottom: 20px;
  display: inline-flex;
  min-width: 112px;
  height: 44px;
  align-items: center;
  justify-content: center;
  gap: 7px;
  padding: 0 15px;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius-full);
  background: var(--surface);
  box-shadow: 0 16px 48px -18px rgb(15 23 42 / 34%);
  color: var(--ink);
  font-size: 14px;
  font-weight: 500;
  line-height: 20px;
}

.hosted-preview-launcher:hover {
  background: var(--surface-active);
}

.hosted-preview-launcher:focus-visible,
.hosted-preview-dialog :is(button, [tabindex="0"]):focus-visible {
  outline: 2px solid var(--blue);
  outline-offset: 2px;
}

.hosted-preview-launcher svg {
  width: 17px;
  height: 17px;
  flex: 0 0 17px;
}

body.lab-open .hosted-preview-launcher {
  bottom: calc(88px + env(safe-area-inset-bottom, 0px));
}

.hosted-preview-overlay {
  position: fixed;
  z-index: 120;
  inset: 0;
  display: grid;
  align-items: center;
  justify-items: center;
  padding: max(20px, env(safe-area-inset-top, 0px)) 20px max(20px, env(safe-area-inset-bottom, 0px));
  isolation: isolate;
}

.hosted-preview-backdrop {
  position: absolute;
  z-index: -1;
  inset: 0;
  background: rgb(0 0 0 / 46%);
  backdrop-filter: blur(5px);
}

html[data-theme="dark"] .hosted-preview-backdrop {
  background: rgb(0 0 0 / 74%);
}

.hosted-preview-dialog {
  display: grid;
  width: min(680px, 100%);
  max-height: min(780px, calc(100dvh - 40px));
  grid-template-rows: auto minmax(0, 1fr) auto;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 24px;
  background: var(--surface);
  box-shadow: 0 28px 80px -24px rgb(15 23 42 / 48%);
  color: var(--ink);
}

html[data-theme="dark"] .hosted-preview-dialog {
  background: var(--surface-tertiary);
  box-shadow: 0 28px 80px -24px rgb(0 0 0 / 78%);
}

.hosted-preview-header {
  display: flex;
  min-width: 0;
  align-items: flex-start;
  justify-content: space-between;
  gap: 20px;
  padding: 24px 24px 18px;
  border-bottom: 1px solid var(--line);
}

.hosted-preview-header > div {
  min-width: 0;
}

.hosted-preview-eyebrow {
  margin: 0 0 4px;
  color: var(--ink-secondary);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.04em;
  line-height: 18px;
  text-transform: uppercase;
}

.hosted-preview-header h2 {
  margin: 0;
  color: var(--ink);
  font-size: clamp(22px, 3vw, 28px);
  font-weight: 600;
  line-height: 1.2;
}

.hosted-preview-close {
  display: inline-grid;
  width: 36px;
  height: 36px;
  min-width: 36px;
  flex: 0 0 36px;
  place-items: center;
  border: 0;
  border-radius: var(--radius-md);
  background: transparent;
  color: var(--ink-secondary);
}

.hosted-preview-close:hover {
  background: var(--surface-active);
  color: var(--ink);
}

.hosted-preview-close svg {
  width: 18px;
  height: 18px;
}

.hosted-preview-body {
  min-height: 0;
  overflow-y: auto;
  padding: 22px 24px;
  overscroll-behavior: contain;
}

.hosted-preview-body > p {
  max-width: 62ch;
  margin: 0;
  color: var(--ink-secondary);
  font-size: 15px;
  line-height: 1.6;
}

.hosted-preview-body > p + p {
  margin-top: 10px;
}

.hosted-preview-body .hosted-preview-summary {
  color: var(--ink);
  font-size: 16px;
}

.hosted-preview-repository a {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  color: var(--ink);
  font-weight: 500;
  text-decoration: underline;
  text-decoration-color: var(--line-strong);
  text-underline-offset: 3px;
}

.hosted-preview-repository a:hover {
  text-decoration-color: currentColor;
}

.hosted-preview-repository svg {
  width: 15px;
  height: 15px;
}

.hosted-preview-command-panel {
  margin: 20px 0;
  overflow: hidden;
  border: 1px solid rgb(255 255 255 / 12%);
  border-radius: 14px;
  background: #171717;
  color: #f5f5f5;
}

.hosted-preview-command-header {
  display: flex;
  min-height: 44px;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 0 10px 0 16px;
  border-bottom: 1px solid rgb(255 255 255 / 10%);
  color: #a3a3a3;
  font-size: 12px;
  font-weight: 500;
}

.hosted-preview-copy {
  display: inline-flex;
  min-height: 32px;
  align-items: center;
  gap: 6px;
  padding: 0 9px;
  border: 0;
  border-radius: 8px;
  background: transparent;
  color: #e5e5e5;
  font: inherit;
}

.hosted-preview-copy:hover {
  background: rgb(255 255 255 / 9%);
}

.hosted-preview-copy svg {
  width: 15px;
  height: 15px;
}

.hosted-preview-commands {
  max-width: 100%;
  margin: 0;
  padding: 17px 18px 9px;
  overflow-wrap: anywhere;
  color: #f5f5f5;
  font: 500 13px/1.75 ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", monospace;
  white-space: pre-wrap;
  word-break: normal;
}

.hosted-preview-copy-status {
  min-height: 27px;
  margin: 0;
  padding: 0 18px 9px;
  color: #a3a3a3;
  font-size: 12px;
  line-height: 18px;
}

.hosted-preview-prerequisites strong {
  color: var(--ink);
  font-weight: 600;
}

.hosted-preview-actions {
  display: flex;
  justify-content: flex-end;
  padding: 16px 24px;
  border-top: 1px solid var(--line);
}

.hosted-preview-continue {
  min-width: 148px;
  min-height: 42px;
}

@media (max-width: 766px) {
  body.lab-open .hosted-preview-launcher {
    bottom: calc(78px + env(safe-area-inset-bottom, 0px));
  }
}

@media (max-width: 440px) {
  .hosted-preview-launcher {
    right: 106px;
  }

  .hosted-preview-overlay {
    align-items: end;
    padding: max(8px, env(safe-area-inset-top, 0px)) 0 0;
  }

  .hosted-preview-dialog {
    width: 100%;
    max-height: calc(100dvh - max(8px, env(safe-area-inset-top, 0px)));
    border-right: 0;
    border-bottom: 0;
    border-left: 0;
    border-radius: 20px 20px 0 0;
  }

  .hosted-preview-header {
    padding: 19px 16px 15px;
  }

  .hosted-preview-header h2 {
    font-size: 22px;
  }

  .hosted-preview-body {
    padding: 18px 16px;
  }

  .hosted-preview-command-panel {
    margin: 16px 0;
  }

  .hosted-preview-commands {
    padding-right: 14px;
    padding-left: 14px;
    font-size: 12px;
  }

  .hosted-preview-copy-status {
    padding-right: 14px;
    padding-left: 14px;
  }

  .hosted-preview-actions {
    padding: 12px 16px max(12px, env(safe-area-inset-bottom, 0px));
  }

  .hosted-preview-continue {
    width: 100%;
  }
}

@media (max-width: 340px) {
  .hosted-preview-launcher {
    right: 102px;
    min-width: 104px;
    padding-right: 12px;
    padding-left: 12px;
    font-size: 13px;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    scroll-behavior: auto !important;
    transition-duration: 0.01ms !important;
  }
}

/* Shared Learn navigation, documentation search, and the genuine Docs agent. */

.site-header {
  z-index: 50;
}

.site-header .header-search {
  display: inline-flex;
  width: 208px;
  min-width: 208px;
  height: 38px;
  min-height: 38px;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 0 16px;
  border: 1px solid var(--line);
  border-radius: var(--radius-full);
  background: var(--surface);
  color: var(--ink-secondary);
  font-size: 14px;
  font-weight: 400;
  line-height: 20px;
}

.header-search-label {
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.site-header .header-search svg,
.header-search-icon {
  width: 16px;
  height: 16px;
  flex: 0 0 16px;
}

.site-header .header-search:hover {
  border-color: var(--line-strong);
  background: var(--surface-secondary);
  color: var(--ink);
}

html[data-theme="dark"] .site-header .header-search {
  background: var(--surface-tertiary);
}

html[data-theme="dark"] .site-header .header-search:hover {
  background: var(--surface-active);
}

.site-header .header-cta {
  display: inline-flex;
  width: 136px;
  height: 36px;
  min-height: 36px;
  align-items: center;
  justify-content: center;
  gap: 7px;
  padding: 0 14px;
  font-size: 14px;
  font-weight: 500;
}

.site-header .header-cta svg {
  width: 14px;
  height: 14px;
  flex: 0 0 14px;
}

.header-cta-label {
  white-space: nowrap;
}

.mobile-nav-search {
  display: none;
}

body.learn-search-open {
  overflow: hidden;
}

.learn-search-overlay {
  position: fixed;
  z-index: 60;
  inset: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  align-content: start;
  justify-items: center;
  padding: 96px 24px 24px;
  isolation: isolate;
}

.learn-search-backdrop {
  position: absolute;
  z-index: -1;
  inset: 0;
  border: 0;
  background: rgb(0 0 0 / 35%);
  backdrop-filter: blur(4px);
}

html[data-theme="dark"] .learn-search-backdrop {
  background: rgb(0 0 0 / 70%);
}

.learn-search-dialog {
  position: relative;
  display: grid;
  width: min(896px, 100%);
  max-height: min(720px, calc(100dvh - 120px));
  grid-template-rows: auto minmax(0, 1fr);
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 28px;
  background: var(--surface);
  box-shadow: 0 28px 72px -24px rgb(15 23 42 / 34%);
  color: var(--ink);
}

html[data-theme="dark"] .learn-search-dialog {
  background: var(--surface-tertiary);
  box-shadow: 0 28px 72px -24px rgb(0 0 0 / 68%);
}

.learn-search-field {
  display: flex;
  min-width: 0;
  min-height: 72px;
  align-items: center;
  gap: 12px;
  padding: 0 20px 0 24px;
  border-bottom: 1px solid var(--line);
}

.learn-search-field > svg {
  width: 20px;
  height: 20px;
  flex: 0 0 20px;
  color: var(--ink-secondary);
}

.learn-search-input {
  width: 100%;
  min-width: 0;
  height: 46px;
  flex: 1 1 auto;
  padding: 0;
  border: 0;
  outline: 0;
  background: transparent;
  color: var(--ink);
  font-size: 18px;
  line-height: 28px;
}

.learn-search-input::placeholder,
.ask-ai-input::placeholder {
  color: var(--ink-tertiary);
}

.ask-ai-input::placeholder {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.learn-search-close,
.ask-ai-close,
.ask-ai-new {
  display: inline-grid;
  width: 32px;
  height: 32px;
  flex: 0 0 32px;
  place-items: center;
  border: 0;
  border-radius: var(--radius-md);
  background: transparent;
  color: var(--ink-secondary);
}

.learn-search-close:hover,
.ask-ai-close:hover,
.ask-ai-new:hover {
  background: var(--surface-active);
  color: var(--ink);
}

.learn-search-close svg,
.ask-ai-close svg,
.ask-ai-new svg {
  width: 18px;
  height: 18px;
}

.learn-search-results {
  display: grid;
  min-width: 0;
  min-height: 0;
  align-content: start;
  gap: 8px;
  overflow: auto;
  padding: 18px 20px 20px;
  overscroll-behavior: contain;
}

.learn-search-results > :is(h2, h3, p) {
  margin: 0 0 4px;
  color: var(--ink-secondary);
  font-size: 14px;
  font-weight: 500;
  line-height: 20px;
}

.learn-search-suggestions {
  display: grid;
  min-width: 0;
  gap: 10px;
}

.learn-search-label {
  margin: 0;
  color: var(--ink-secondary);
  font-size: 14px;
  font-weight: 500;
  line-height: 20px;
}

.learn-search-chips {
  display: flex;
  min-width: 0;
  flex-wrap: wrap;
  gap: 8px;
}

.learn-search-chip {
  display: inline-flex;
  width: fit-content;
  max-width: 100%;
  min-height: 34px;
  align-items: center;
  gap: 7px;
  padding: 0 11px;
  border: 1px solid var(--line);
  border-radius: var(--radius-full);
  background: transparent;
  color: var(--ink);
  font-size: 14px;
}

.learn-search-chip:hover {
  background: var(--surface-active);
}

.learn-search-chip svg {
  width: 15px;
  height: 15px;
}

.learn-search-list {
  display: grid;
  min-width: 0;
  gap: 2px;
}

.learn-search-result {
  display: grid;
  min-width: 0;
  gap: 4px;
  padding: 10px 12px;
  border-radius: var(--radius-md);
  color: var(--ink);
  font-size: 14px;
  line-height: 21px;
  overflow-wrap: anywhere;
}

.learn-search-result:hover,
.learn-search-result:focus-visible {
  background: var(--surface-active);
}

.learn-search-result :is(small, p, span) {
  margin: 0;
  color: var(--ink-secondary);
  font-size: 12px;
  line-height: 18px;
}

.learn-search-result .learn-search-result-title {
  color: var(--ink);
  font-size: 14px;
  font-weight: 500;
  line-height: 21px;
}

.learn-search-result .learn-search-result-description {
  color: var(--ink-secondary);
  font-size: 13px;
  line-height: 20px;
}

.learn-search-result .learn-search-result-category {
  color: var(--ink-tertiary);
  font-size: 12px;
  line-height: 18px;
}

.learn-search-empty {
  margin: 0;
  color: var(--ink-secondary);
  font-size: 14px;
  line-height: 22px;
}

.ask-ai-launcher {
  position: fixed;
  z-index: 50;
  right: 20px;
  bottom: 20px;
  display: inline-flex;
  min-width: 74px;
  height: 44px;
  align-items: center;
  justify-content: center;
  padding: 0 16px;
  border: 0;
  border-radius: var(--radius-full);
  background: var(--button-dark);
  box-shadow: 0 16px 48px -18px rgb(15 23 42 / 45%);
  color: var(--button-foreground);
  font-size: 14px;
  font-weight: 500;
  line-height: 20px;
}

.ask-ai-launcher:hover {
  background: var(--button-dark-hover);
}

body.lab-open .ask-ai-launcher {
  bottom: calc(88px + env(safe-area-inset-bottom, 0px));
}

.ask-ai-drawer {
  position: fixed;
  z-index: 80;
  inset: 0 0 0 auto;
  display: flex;
  width: min(440px, 100vw);
  min-width: 0;
  min-height: 0;
  flex-direction: column;
  overflow: hidden;
  border-left: 1px solid var(--line);
  background: var(--surface);
  color: var(--ink);
}

html[data-theme="dark"] .ask-ai-drawer {
  background: var(--surface-tertiary);
}

.ask-ai-header {
  display: flex;
  height: 64px;
  min-height: 64px;
  flex: 0 0 64px;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 0 16px;
  border-bottom: 1px solid var(--line);
}

.ask-ai-header :is(h2, h3) {
  min-width: 0;
  margin: 0;
  overflow: hidden;
  color: var(--ink);
  font-size: 16px;
  font-weight: 600;
  line-height: 24px;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.ask-ai-header-actions {
  display: flex;
  flex: 0 0 auto;
  align-items: center;
  gap: 4px;
}

.ask-ai-body {
  display: flex;
  min-width: 0;
  min-height: 0;
  flex: 1 1 auto;
  flex-direction: column;
  justify-content: flex-end;
  gap: 16px;
  overflow: auto;
  padding: 24px 24px 16px;
  overscroll-behavior: contain;
}

.ask-ai-greeting {
  margin: 0;
  color: var(--ink);
  font-size: 24px;
  font-weight: 600;
  letter-spacing: -0.025em;
  line-height: 32px;
}

.ask-ai-scope {
  margin: 0;
  color: var(--ink-secondary);
  font-size: 14px;
  line-height: 22px;
}

.ask-ai-messages {
  display: grid;
  min-width: 0;
  align-content: end;
  gap: 14px;
}

.ask-ai-message {
  max-width: 100%;
  margin: 0;
  color: var(--ink);
  font-size: 14px;
  line-height: 22px;
  overflow-wrap: anywhere;
}

.ask-ai-message > p {
  margin: 0;
}

.ask-ai-message[data-role="user"] {
  align-self: flex-end;
  padding: 9px 12px;
  border-radius: 16px;
  background: var(--surface-active);
}

.ask-ai-message-user {
  width: fit-content;
  max-width: 90%;
  justify-self: end;
  padding: 9px 12px;
  border-radius: 16px;
  background: var(--surface-active);
}

.ask-ai-message-assistant {
  width: 100%;
  justify-self: start;
}

.ask-ai-loading {
  margin: 0;
  color: var(--ink-secondary);
  font-size: 13px;
  line-height: 20px;
}

.ask-ai-suggestions {
  display: grid;
  min-width: 0;
  gap: 4px;
}

.ask-ai-suggestion {
  display: flex;
  width: 100%;
  min-width: 0;
  min-height: 44px;
  align-items: center;
  justify-content: flex-start;
  gap: 12px;
  padding: 0 10px;
  border: 0;
  border-radius: var(--radius-md);
  background: transparent;
  color: var(--ink);
  font-size: 14px;
  line-height: 20px;
  text-align: left;
}

.ask-ai-suggestion:hover {
  background: var(--surface-active);
}

.ask-ai-suggestion svg {
  width: 16px;
  height: 16px;
  flex: 0 0 16px;
  color: var(--ink-secondary);
}

.ask-ai-composer {
  display: flex;
  min-width: 0;
  min-height: 48px;
  flex: 0 0 auto;
  align-items: center;
  gap: 8px;
  margin: 0 16px 20px;
  padding: 5px 5px 5px 15px;
  border: 1px solid var(--line);
  border-radius: 24px;
  background: var(--surface);
}

html[data-theme="dark"] .ask-ai-composer {
  background: #2b2b2b;
}

.ask-ai-input {
  width: 100%;
  min-width: 0;
  height: 34px;
  flex: 1 1 auto;
  padding: 0;
  border: 0;
  outline: 0;
  background: transparent;
  color: var(--ink);
  font-size: 14px;
  line-height: 20px;
  resize: none;
}

.ask-ai-send {
  display: inline-grid;
  width: 34px;
  height: 34px;
  flex: 0 0 34px;
  place-items: center;
  border: 0;
  border-radius: var(--radius-full);
  background: var(--button-dark);
  color: var(--button-foreground);
}

.ask-ai-send:hover:not(:disabled) {
  background: var(--button-dark-hover);
}

.ask-ai-send svg {
  width: 16px;
  height: 16px;
}

.ask-ai-error {
  margin: 0;
  color: var(--red);
  font-size: 13px;
  line-height: 20px;
}

@media (min-width: 1024px) {
  body.ask-ai-open #app {
    padding-right: 440px;
  }

  body.ask-ai-open #app > .lab-shell.phase-brief,
  body.ask-ai-open #app > .lab-shell.phase-practice {
    width: calc(100% - 440px);
    max-width: calc(100% - 440px);
  }

  body.ask-ai-open #app > .lab-shell.phase-brief .journey-header,
  body.ask-ai-open #app > .lab-shell.phase-practice .journey-header {
    grid-template-columns: minmax(0, 1fr) auto;
    gap: 16px;
    padding-right: 24px;
    padding-left: 24px;
  }

  body.ask-ai-open #app > .lab-shell.phase-brief .journey-stage-nav,
  body.ask-ai-open #app > .lab-shell.phase-practice .journey-stage-nav {
    display: none;
  }

  body.ask-ai-open #app > .lab-shell.phase-practice .practice-screen {
    grid-template-areas:
      "workspace"
      "guidance";
    grid-template-columns: minmax(0, 1fr);
    grid-template-rows: minmax(0, 1fr) auto;
    column-gap: 0;
    row-gap: 8px;
    padding: 13px 14px 11px;
  }

  body.ask-ai-open #app > .lab-shell.phase-practice .practice-codex-frame {
    width: 100%;
    height: 100%;
    max-height: 100%;
    min-height: 0;
    align-self: stretch;
  }

  body.ask-ai-open #app > .lab-shell.phase-practice .practice-guidance-stack {
    max-height: min(405px, 47dvh);
    grid-area: guidance;
    gap: 8px;
  }

  body.ask-ai-open #app > .lab-shell.phase-practice .practice-task-card {
    position: relative;
    inset: auto;
    width: 100%;
    max-width: 100%;
    max-height: min(265px, 34dvh);
    grid-area: auto;
    align-self: stretch;
  }

  body.ask-ai-open #app > .lab-shell.phase-practice .hint-dock {
    position: relative;
    inset: auto;
    max-width: 100%;
    grid-area: auto;
    transform: none;
  }

  body.ask-ai-open .site-header .header-search {
    display: none;
  }
}

@media (max-width: 1279px) {
  .site-header .header-search {
    width: 38px;
    min-width: 38px;
    justify-content: center;
    padding: 0;
  }

  .site-header .header-search-label {
    display: none;
  }
}

@media (max-width: 1023px) {
  .header-inner {
    grid-template-columns: minmax(0, 1fr) auto;
  }

  .top-nav {
    display: none;
  }

  .menu-toggle {
    display: inline-grid;
  }

  .top-nav.is-open,
  .top-nav.open {
    position: absolute;
    top: calc(var(--header-height) - 1px);
    right: 0;
    left: 0;
    display: grid;
    gap: 5px;
    padding: 12px 20px 15px;
    border-bottom: 1px solid var(--line);
    background: var(--surface);
  }

  .top-nav.is-open .mobile-nav-search,
  .top-nav.open .mobile-nav-search {
    display: inline-flex;
    min-height: 38px;
    align-items: center;
    gap: 9px;
    color: var(--ink-secondary);
    text-align: left;
  }

  .mobile-nav-search svg {
    width: 16px;
    height: 16px;
  }
}

@media (max-width: 767px) {
  .ask-ai-drawer {
    top: auto;
    right: 0;
    bottom: 0;
    left: 0;
    width: 100%;
    height: min(78dvh, 640px);
    min-height: 0;
    border: 1px solid var(--line);
    border-bottom: 0;
    border-radius: 16px 16px 0 0;
  }

  .ask-ai-body {
    padding-right: 20px;
    padding-left: 20px;
  }

  .ask-ai-composer {
    margin-bottom: max(16px, env(safe-area-inset-bottom, 0px));
  }

  body.lab-open .ask-ai-launcher {
    bottom: calc(78px + env(safe-area-inset-bottom, 0px));
  }
}

@media (max-width: 690px) {
  .site-header .header-search {
    display: inline-flex;
    width: 34px;
    min-width: 34px;
    height: 34px;
    min-height: 34px;
  }

  .site-header .header-cta {
    width: auto;
    height: 34px;
    min-height: 34px;
    gap: 4px;
    padding: 0 10px;
    font-size: 12px;
  }

  .site-header .header-cta svg {
    width: 12px;
    height: 12px;
    flex-basis: 12px;
  }

  .learn-search-overlay {
    display: block;
    padding: 0;
  }

  .learn-search-dialog {
    width: 100%;
    height: 100dvh;
    max-height: 100dvh;
    border: 0;
    border-radius: 0;
  }

  .learn-search-field {
    min-height: 80px;
    gap: 9px;
    padding: 0 16px;
  }

  .learn-search-results {
    padding: 16px;
  }
}

@media (max-width: 440px) {
  .header-inner {
    padding-right: 10px;
    padding-left: 10px;
  }

  .brand {
    gap: 8px;
  }

  .header-actions {
    gap: 4px;
  }

  .site-header .header-search,
  .site-header .header-theme,
  .site-header .menu-toggle {
    width: 32px;
    min-width: 32px;
    height: 32px;
    min-height: 32px;
    flex-basis: 32px;
  }

  .site-header .header-cta {
    padding: 0 8px;
    font-size: 11px;
  }

  .ask-ai-body {
    padding-right: 16px;
    padding-left: 16px;
  }

  .ask-ai-composer {
    margin-right: 12px;
    margin-left: 12px;
  }
}

@media (max-width: 360px) {
  .header-inner {
    padding-right: 8px;
    padding-left: 8px;
  }

  .brand {
    gap: 6px;
  }

  .header-actions {
    gap: 3px;
  }

  .site-header .header-search,
  .site-header .header-theme,
  .site-header .menu-toggle {
    width: 30px;
    min-width: 30px;
    height: 30px;
    min-height: 30px;
    flex-basis: 30px;
  }

  .site-header .header-cta {
    gap: 0;
    padding: 0 7px;
  }

  .site-header .header-cta svg {
    display: none;
  }
}