:root {
  color-scheme: light;
  --bg: #f6f7f9;
  --surface: #fff;
  --surface-2: #eef2f7;
  --ink: #18202c;
  --muted: #5b6677;
  --line: #dde3ec;
  --blue: #2b5ce6;
  --blue-deep: #1746bd;
  --blue-soft: #edf2ff;
  --blue-line: #cfdcff;
  --green: #1f8f5f;
  --green-soft: #e8f6ef;
  --green-line: #c7ebda;
  --red: #c7423f;
  --amber: #a56b18;
  --amber-soft: #fdf3e2;
  --accent-contrast: #fff;
  --header-bg: rgb(246 247 249 / 88%);
  --shadow: 0 24px 70px rgb(23 35 61 / 8%);
  --radius: 18px;
  font-family:
    -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei",
    sans-serif;
}

@media (prefers-color-scheme: dark) {
  :root {
    color-scheme: dark;
    --bg: #0d1117;
    --surface: #141a23;
    --surface-2: #1a222e;
    --ink: #e6eaf1;
    --muted: #9aa6b8;
    --line: #293241;
    --blue: #7aa2ff;
    --blue-deep: #9cbaff;
    --blue-soft: #1a2540;
    --blue-line: #2f4270;
    --green: #5cc99a;
    --green-soft: #15291f;
    --green-line: #244634;
    --red: #ff8a80;
    --amber: #e0b25a;
    --amber-soft: #2b2214;
    --accent-contrast: #0d1117;
    --header-bg: rgb(13 17 23 / 88%);
    --shadow: 0 24px 70px rgb(0 0 0 / 35%);
  }
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: 100px;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-size: 15px;
  line-height: 1.8;
  -webkit-font-smoothing: antialiased;
}

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

a:hover {
  color: var(--blue);
}

a:focus-visible,
summary:focus-visible {
  outline: 3px solid var(--blue);
  outline-offset: 5px;
  border-radius: 4px;
}

h1,
h2,
h3,
p {
  margin: 0;
}

h1,
h2,
h3 {
  line-height: 1.35;
}

code,
kbd,
pre {
  font-family: "SFMono-Regular", "SF Mono", Consolas, "Liberation Mono", monospace;
}

.container {
  width: min(1120px, calc(100% - 64px));
  margin-inline: auto;
}

.skip-link {
  position: fixed;
  top: -100px;
  left: 20px;
  padding: 8px 16px;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 6px;
  z-index: 30;
}

.skip-link:focus {
  top: 12px;
}

.header {
  position: sticky;
  top: 0;
  z-index: 10;
  background: var(--header-bg);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(12px);
}

.nav {
  min-height: 76px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: 23px;
  font-weight: 750;
  letter-spacing: -1px;
  white-space: nowrap;
}

.brand-mark {
  width: 32px;
  height: 32px;
  display: grid;
  place-items: center;
  border-radius: 9px;
  background: var(--ink);
  color: var(--bg);
  font-size: 22px;
  font-weight: 750;
  line-height: 1;
}

.brand-caption {
  margin-left: 12px;
  padding-left: 20px;
  border-left: 1px solid var(--line);
  color: var(--muted);
  font-size: 13px;
  font-weight: 400;
  letter-spacing: 0;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 28px;
  font-size: 14px;
}

.nav-github {
  padding: 7px 16px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--surface);
}

.hero {
  padding-block: 96px 76px;
  display: grid;
  grid-template-columns: 1.02fr 1fr;
  align-items: center;
  gap: 52px;
}

.eyebrow {
  display: flex;
  align-items: center;
  gap: 9px;
  color: var(--muted);
  font-family: "SFMono-Regular", "SF Mono", Consolas, monospace;
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 1.6px;
  line-height: 1.5;
}

.eyebrow.light {
  color: #94a5bf;
}

.status-dot {
  display: inline-block;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: #2ba36f;
  flex: 0 0 auto;
}

h1 {
  margin-top: 22px;
  font-size: clamp(44px, 5vw, 66px);
  font-weight: 760;
  letter-spacing: -0.035em;
  line-height: 1.2;
}

.accent {
  color: var(--blue);
}

.hero-lead {
  margin-top: 24px;
  font-size: 20px;
  font-weight: 550;
  line-height: 1.7;
}

.hero-description {
  max-width: 540px;
  margin-top: 14px;
  color: var(--muted);
  font-size: 15px;
}

.actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 30px;
}

.button {
  min-height: 46px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 22px;
  padding: 10px 21px;
  border-radius: 8px;
  font-size: 14px;
  font-weight: 600;
  transition:
    background 150ms ease,
    border-color 150ms ease;
}

.primary {
  background: var(--blue);
  color: var(--accent-contrast);
}

.primary:hover {
  background: var(--blue-deep);
  color: var(--accent-contrast);
}

.secondary {
  background: var(--surface);
  border: 1px solid var(--line);
}

.secondary:hover {
  border-color: var(--blue-line);
}

.hero-note {
  margin-top: 18px;
  color: var(--muted);
  font-size: 12px;
}

.mobile-break {
  display: none;
}

.app-window {
  margin: 0;
  border: 1px solid var(--line);
  border-radius: 20px;
  background: var(--surface);
  box-shadow: var(--shadow);
  overflow: hidden;
}

.window-bar {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 13px 16px;
  background: var(--surface-2);
  border-bottom: 1px solid var(--line);
}

.window-dots {
  display: flex;
  gap: 5px;
}

.window-dots i {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: #c7cedb;
}

.window-title {
  overflow: hidden;
  color: var(--muted);
  font-size: 12px;
  font-weight: 550;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.model-chip {
  margin-left: auto;
  padding: 3px 9px;
  border: 1px solid var(--blue-line);
  border-radius: 999px;
  background: var(--blue-soft);
  color: var(--blue);
  font-family: "SFMono-Regular", "SF Mono", Consolas, monospace;
  font-size: 10px;
  white-space: nowrap;
}

.app-grid {
  display: grid;
  grid-template-columns: 1.32fr 0.82fr;
  min-height: 432px;
}

.chat-pane {
  display: flex;
  flex-direction: column;
  gap: 12px;
  min-width: 0;
  padding: 16px;
  border-right: 1px solid var(--line);
}

.message {
  font-size: 12px;
  line-height: 1.75;
}

.user-message {
  align-self: flex-end;
  max-width: 92%;
  padding: 9px 12px;
  border-radius: 13px 13px 4px 13px;
  background: var(--blue);
  color: var(--accent-contrast);
}

.assistant-message {
  color: var(--ink);
}

.assistant-head {
  display: flex;
  align-items: center;
  gap: 7px;
  font-size: 11px;
  font-weight: 650;
}

.avatar {
  width: 18px;
  height: 18px;
  display: grid;
  place-items: center;
  border-radius: 5px;
  background: var(--ink);
  color: var(--bg);
  font-size: 11px;
  font-weight: 750;
}

.working {
  margin-left: 2px;
  color: var(--green);
  font-family: "SFMono-Regular", "SF Mono", Consolas, monospace;
  font-size: 9px;
  font-weight: 500;
}

.assistant-text {
  margin-top: 8px;
  color: var(--muted);
}

.tool-row {
  display: grid;
  grid-template-columns: 48px minmax(0, 1fr) auto;
  align-items: center;
  gap: 8px;
  margin-top: 7px;
  padding: 6px 9px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--surface-2);
  font-family: "SFMono-Regular", "SF Mono", Consolas, monospace;
  font-size: 10px;
}

.tool-row code {
  color: var(--blue);
}

.tool-path {
  overflow: hidden;
  color: var(--muted);
  text-overflow: ellipsis;
  white-space: nowrap;
}

.tool-state {
  font-size: 9px;
  white-space: nowrap;
}

.tool-state.ok {
  color: var(--green);
}

.tool-state.running {
  color: var(--amber);
}

.diff-preview {
  margin-top: 10px;
  padding: 9px 10px;
  border-radius: 9px;
  background: #0f1724;
  color: #dbe4f0;
  font-size: 10px;
  overflow-x: auto;
}

.diff-file {
  display: block;
  margin-bottom: 4px;
  color: #93a4bd;
  font-family: "SFMono-Regular", "SF Mono", Consolas, monospace;
}

.diff-line {
  display: block;
  white-space: pre;
}

.diff-line.del {
  color: #ff9d9a;
}

.diff-line.add {
  color: #7ee2b0;
}

.assistant-tail {
  margin-top: 9px;
  color: var(--muted);
  font-size: 11px;
}

.composer {
  display: flex;
  align-items: center;
  gap: 6px;
  margin-top: auto;
  padding: 8px 10px;
  border: 1px solid var(--line);
  border-radius: 8px;
  color: var(--muted);
  font-size: 11px;
}

.composer-placeholder {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.composer kbd {
  margin-left: auto;
  padding: 1px 5px;
  border: 1px solid var(--line);
  border-radius: 4px;
  background: var(--surface-2);
  font-size: 9px;
}

.composer-hint {
  font-size: 9px;
  white-space: nowrap;
}

.panel-pane {
  display: flex;
  flex-direction: column;
  min-width: 0;
  padding: 14px;
}

.panel-tabs {
  display: flex;
  gap: 12px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--line);
  font-size: 10px;
  color: var(--muted);
  white-space: nowrap;
}

.panel-tabs .active {
  color: var(--blue);
  font-weight: 650;
}

.review-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  margin-top: 12px;
  font-size: 10px;
  color: var(--muted);
}

.review-count {
  font-family: "SFMono-Regular", "SF Mono", Consolas, monospace;
  font-size: 9px;
}

.review-files {
  list-style: none;
  margin: 8px 0 0;
  padding: 0;
}

.review-files li {
  display: grid;
  grid-template-columns: 26px minmax(0, 1fr) auto;
  align-items: center;
  gap: 7px;
  padding: 7px 0;
  border-bottom: 1px solid var(--line);
  font-size: 10px;
}

.file-badge {
  display: inline-grid;
  place-items: center;
  height: 18px;
  border-radius: 4px;
  background: var(--blue-soft);
  color: var(--blue);
  font-family: "SFMono-Regular", "SF Mono", Consolas, monospace;
  font-size: 7px;
  font-weight: 650;
}

.file-name {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.file-stat {
  display: flex;
  gap: 5px;
  font-family: "SFMono-Regular", "SF Mono", Consolas, monospace;
  font-size: 9px;
}

.file-stat b {
  color: var(--green);
  font-weight: 500;
}

.file-stat i {
  color: var(--red);
  font-style: normal;
}

.review-total {
  margin-top: 10px;
  padding: 8px 9px;
  border-radius: 7px;
  background: var(--surface-2);
  color: var(--muted);
  font-family: "SFMono-Regular", "SF Mono", Consolas, monospace;
  font-size: 9px;
}

.review-total b {
  color: var(--green);
  font-weight: 500;
}

.review-total i {
  color: var(--red);
  font-style: normal;
}

.panel-hint {
  margin-top: auto;
  color: var(--muted);
  font-size: 9px;
  line-height: 1.6;
}

.principle-strip {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  align-items: center;
  gap: 30px;
  padding: 22px 0;
  border-block: 1px solid var(--line);
  font-size: 13px;
  letter-spacing: 0.5px;
}

.strip-divider {
  color: var(--line);
  font-weight: 300;
}

.section {
  padding-block: 88px;
}

.section-heading {
  max-width: 740px;
  margin-bottom: 36px;
}

h2 {
  margin-top: 16px;
  font-size: clamp(28px, 3vw, 37px);
  font-weight: 700;
  letter-spacing: -0.03em;
}

.section-heading > p:last-child {
  margin-top: 16px;
  color: var(--muted);
}

h3 {
  font-size: 18px;
  font-weight: 650;
}

.philosophy-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.philosophy-card {
  padding: 27px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
}

.card-number {
  color: var(--blue);
  font-family: "SFMono-Regular", "SF Mono", Consolas, monospace;
  font-size: 12px;
}

.philosophy-card h3 {
  margin-top: 22px;
}

.philosophy-card > p {
  margin-top: 13px;
  color: var(--muted);
  font-size: 14px;
}

.inline-tools {
  display: flex;
  flex-wrap: wrap;
  gap: 7px;
  margin-top: 20px;
}

.inline-tools code {
  padding: 2px 7px;
  border: 1px solid var(--line);
  border-radius: 5px;
  background: var(--bg);
  font-size: 12px;
}

.small-note,
.philosophy-card > .small-note {
  color: var(--muted);
  font-size: 12px;
}

.clarification {
  display: flex;
  gap: 18px;
  margin-top: 24px;
  padding: 20px 24px;
  border-radius: 10px;
  background: var(--surface-2);
  color: var(--muted);
  font-size: 13px;
}

.clarification > span {
  color: var(--blue);
  font-size: 24px;
  line-height: 1;
}

.clarification strong {
  color: var(--ink);
  font-weight: 600;
}

.feature-section {
  border-block: 1px solid var(--line);
  background: var(--surface-2);
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
}

.feature-card {
  padding: 30px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
}

.featured {
  border-color: var(--blue-line);
  background: linear-gradient(120deg, var(--surface), var(--blue-soft));
}

.card-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.feature-symbol {
  color: var(--blue);
  font-family: "SFMono-Regular", "SF Mono", Consolas, monospace;
  font-size: 26px;
  line-height: 1;
}

.pill {
  padding: 3px 10px;
  border-radius: 20px;
  background: var(--bg);
  color: var(--muted);
  font-size: 11px;
}

.feature-card h3 {
  margin-top: 26px;
  font-size: 22px;
}

.feature-card > p {
  margin-top: 14px;
  color: var(--muted);
  font-size: 14px;
}

.feature-card > .small-note {
  margin-top: 20px;
  padding-top: 14px;
  border-top: 1px solid var(--line);
  font-size: 12px;
}

.protocol-list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 22px;
}

.protocol-list span {
  padding: 4px 9px;
  border-radius: 5px;
  background: var(--blue-soft);
  color: var(--blue);
  font-family: "SFMono-Regular", "SF Mono", Consolas, monospace;
  font-size: 11px;
}

.env-example {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 20px;
}

.env-example code {
  padding: 4px 8px;
  border-radius: 5px;
  background: var(--bg);
  font-size: 11px;
  overflow-wrap: anywhere;
}

.env-example > span {
  width: 100%;
  color: var(--muted);
  font-size: 11px;
}

.collaboration-section {
  display: grid;
  grid-template-columns: 1fr 1fr;
  align-items: center;
  gap: 72px;
}

.collaboration-copy > p:not(.eyebrow) {
  margin-top: 22px;
  color: var(--muted);
}

.collaboration-copy > p:nth-of-type(2) {
  color: var(--ink);
  font-size: 19px;
  line-height: 1.8;
}

.check-list {
  list-style: none;
  margin: 24px 0 0;
  padding: 0;
  font-size: 13px;
}

.check-list li {
  margin-top: 10px;
}

.check-list li::before {
  content: "✓";
  margin-right: 10px;
  color: var(--blue);
}

.check-list.light li {
  color: #b6c3d7;
}

.check-list.light li::before {
  color: #7ee2b0;
}

.collaboration-diagram {
  padding: 26px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
}

.diagram-label {
  margin-bottom: 18px;
  color: var(--muted);
  font-size: 11px;
}

.chat-block {
  padding: 18px;
  border: 1px solid var(--line);
  border-radius: 12px;
}

.chat-block h3 {
  margin-top: 12px;
}

.chat-label {
  display: flex;
  align-items: center;
  gap: 8px;
  color: var(--muted);
  font-size: 11px;
}

.chat-block p {
  margin-top: 8px;
  color: var(--muted);
  font-size: 11px;
}

.task-steps {
  display: flex;
  flex-wrap: wrap;
  gap: 7px;
  margin-top: 16px;
  font-size: 10px;
}

.task-steps span {
  padding: 3px 8px;
  border-radius: 4px;
  background: var(--surface-2);
}

.context-bridge {
  padding-block: 14px;
  color: var(--muted);
  font-size: 10px;
}

.context-bridge span {
  margin-right: 7px;
  color: var(--blue);
}

.branch-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
}

.auxiliary-chat {
  background: var(--blue-soft);
  border-color: var(--blue-line);
}

.subagent-chat {
  background: var(--green-soft);
  border-color: var(--green-line);
}

.question-block {
  margin-top: 14px;
  padding: 16px 18px;
  border: 1px dashed var(--blue-line);
  border-radius: 12px;
  background: var(--surface);
}

.question-block > p {
  margin-top: 7px;
  font-size: 12px;
  font-weight: 550;
}

.question-options {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-top: 10px;
  font-size: 10px;
}

.question-options span {
  padding: 3px 9px;
  border: 1px solid var(--blue-line);
  border-radius: 999px;
  color: var(--blue);
}

.question-options span:first-child {
  background: var(--blue);
  border-color: var(--blue);
  color: var(--accent-contrast);
}

.diagram-note {
  margin-top: 16px;
  color: var(--muted);
  font-size: 10px;
}

.workspace-section {
  border-top: 1px solid var(--line);
}

.workspace-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 42px 36px;
}

.workspace-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: 10px;
  background: var(--blue-soft);
  color: var(--blue);
  font-family: "SFMono-Regular", "SF Mono", Consolas, monospace;
  font-size: 22px;
}

.workspace-grid h3 {
  margin-top: 16px;
}

.workspace-grid p {
  margin-top: 11px;
  color: var(--muted);
  font-size: 13.5px;
}

.extension-section {
  border-block: 1px solid var(--line);
  background: var(--surface-2);
}

.extension-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
}

.extension-card {
  padding: 24px;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: var(--surface);
}

.extension-tag {
  color: var(--blue);
  font-family: "SFMono-Regular", "SF Mono", Consolas, monospace;
  font-size: 9px;
  letter-spacing: 1px;
}

.extension-card h3 {
  margin-top: 13px;
  font-size: 17px;
}

.extension-card > p {
  margin-top: 10px;
  color: var(--muted);
  font-size: 13px;
}

.extension-card > .small-note {
  margin-top: 12px;
  padding-top: 10px;
  border-top: 1px solid var(--line);
  font-size: 11px;
}

.developer-section {
  color: #e8edf5;
  background: #101826;
  border-block: 1px solid #1f2a3b;
}

.developer-section a:hover {
  color: #fff;
}

.developer-grid {
  display: grid;
  grid-template-columns: 0.92fr 1.08fr;
  align-items: center;
  gap: 54px;
}

.developer-copy h2 {
  color: #f4f7fb;
}

.developer-copy > p:not(.eyebrow):not(.developer-note) {
  margin-top: 18px;
  color: #aeb9cc;
  font-size: 14px;
}

.developer-actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 14px;
  margin-top: 26px;
}

.button.inverse {
  background: #fff;
  color: #101826;
}

.button.inverse:hover {
  background: #dce6ff;
  color: #101826;
}

.command-chip {
  padding: 9px 13px;
  border: 1px solid #2a3a55;
  border-radius: 7px;
  color: #b8c8e0;
  font-size: 11px;
}

.developer-note {
  margin-top: 22px;
  color: #8797b0;
  font-size: 11.5px;
}

.developer-note a {
  color: #9cbaff;
  text-decoration: underline;
  text-underline-offset: 3px;
}

.developer-note a:hover {
  color: #fff;
}

.developer-note code {
  color: #c8d6ea;
}

.code-card {
  border: 1px solid #223047;
  border-radius: 14px;
  background: #0a0f18;
  overflow: hidden;
}

.code-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 10px 16px;
  border-bottom: 1px solid #223047;
  background: #0d1521;
  color: #8797b0;
  font-family: "SFMono-Regular", "SF Mono", Consolas, monospace;
  font-size: 10px;
}

.code-card pre {
  margin: 0;
  padding: 18px 20px;
  overflow-x: auto;
  color: #c8d6ea;
  font-size: 11.5px;
  line-height: 1.75;
}

.code-card pre code {
  white-space: pre;
}

.package-strip {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  margin-top: 54px;
  border-top: 1px solid #1f2a3b;
}

.package-strip div {
  padding: 22px 18px 0;
  border-left: 1px solid #1f2a3b;
}

.package-strip div:first-child {
  padding-left: 0;
  border-left: 0;
}

.package-strip code {
  display: block;
  color: #f4f7fb;
  font-size: 12px;
}

.package-strip span {
  display: block;
  margin-top: 5px;
  color: #8797b0;
  font-size: 11px;
}

.local-first {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 30px;
  margin-top: 40px;
}

.local-first h3 {
  color: #f4f7fb;
  font-size: 15px;
}

.local-first p {
  margin-top: 9px;
  color: #98a8c2;
  font-size: 12.5px;
}

.getting-started {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  padding: 48px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
}

.getting-started > div > p:not(.eyebrow) {
  margin-top: 16px;
  color: var(--muted);
}

.getting-started .button {
  margin-top: 26px;
}

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

.start-steps li {
  display: flex;
  gap: 18px;
}

.start-steps li + li {
  margin-top: 26px;
}

.start-steps li > span {
  padding-top: 3px;
  color: var(--blue);
  font-family: "SFMono-Regular", "SF Mono", Consolas, monospace;
  font-size: 12px;
}

.start-steps h3 {
  font-size: 16px;
}

.start-steps p {
  margin-top: 5px;
  color: var(--muted);
  font-size: 13px;
}

.platform-note {
  margin-top: 20px;
  color: var(--muted);
  font-size: 12px;
  text-align: center;
}

.faq-section {
  padding-top: 0;
}

.faq-list {
  border-top: 1px solid var(--line);
}

.faq-list details {
  border-bottom: 1px solid var(--line);
}

.faq-list summary {
  padding: 21px 8px;
  cursor: pointer;
  font-size: 15px;
  font-weight: 550;
}

.faq-list summary::marker {
  color: var(--blue);
}

.faq-list details > p {
  max-width: 920px;
  padding: 0 8px 24px 24px;
  color: var(--muted);
  font-size: 14px;
}

.faq-list a {
  color: var(--blue);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.closing {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 38px 0 48px;
}

.closing > p {
  font-size: 26px;
  font-weight: 650;
  letter-spacing: -0.02em;
}

.closing a {
  color: var(--blue);
  font-size: 14px;
  font-weight: 600;
}

.footer {
  display: flex;
  align-items: center;
  gap: 30px;
  padding-block: 30px;
  border-top: 1px solid var(--line);
}

.footer .brand {
  font-size: 18px;
}

.footer .brand-mark {
  width: 25px;
  height: 25px;
  border-radius: 6px;
  font-size: 18px;
}

.footer p {
  color: var(--muted);
  font-size: 12px;
}

.footer > div {
  display: flex;
  gap: 24px;
  margin-left: auto;
  font-size: 12px;
}

@media (min-width: 1440px) {
  .hero {
    padding-block: 116px 92px;
  }
}

@media (max-width: 1000px) {
  .hero {
    gap: 32px;
    padding-block: 72px 60px;
  }

  .brand-caption {
    display: none;
  }

  .hero-lead {
    font-size: 18px;
  }

  .app-grid {
    grid-template-columns: 1.25fr 0.85fr;
  }

  .collaboration-section {
    gap: 36px;
  }

  .extension-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .developer-grid {
    gap: 32px;
  }

  .workspace-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 34px 26px;
  }
}

@media (max-width: 760px) {
  .container {
    width: calc(100% - 40px);
  }

  .nav {
    min-height: 66px;
    gap: 12px;
  }

  .nav-optional,
  .brand-caption {
    display: none;
  }

  .nav-links {
    gap: 16px;
    font-size: 12px;
  }

  .nav-github {
    padding: 5px 10px;
  }

  .hero {
    grid-template-columns: 1fr;
    gap: 38px;
    padding-block: 54px 42px;
  }

  h1 {
    font-size: 46px;
    letter-spacing: -1.6px;
  }

  .hero-lead {
    font-size: 19px;
  }

  .hero-description {
    font-size: 14px;
  }

  .mobile-break {
    display: block;
  }

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

  .chat-pane {
    border-right: 0;
    border-bottom: 1px solid var(--line);
  }

  .panel-pane {
    min-height: 230px;
  }

  .principle-strip {
    justify-content: flex-start;
    gap: 12px;
    padding-block: 18px;
    font-size: 11px;
    letter-spacing: 0;
  }

  .section {
    padding-block: 58px;
  }

  .section-heading {
    margin-bottom: 28px;
  }

  .section-heading > p:last-child {
    font-size: 14px;
  }

  .philosophy-grid,
  .feature-grid,
  .collaboration-section,
  .getting-started {
    grid-template-columns: 1fr;
  }

  .philosophy-card,
  .feature-card {
    padding: 25px;
  }

  .philosophy-card h3 {
    margin-top: 16px;
  }

  .clarification {
    gap: 12px;
    padding: 18px;
  }

  .collaboration-section {
    gap: 30px;
  }

  .collaboration-copy h2 br {
    display: none;
  }

  .workspace-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 32px 22px;
  }

  .workspace-grid h3 {
    font-size: 16px;
  }

  .workspace-grid p {
    font-size: 13px;
  }

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

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

  .package-strip {
    grid-template-columns: repeat(2, 1fr);
    border-top: 0;
    margin-top: 36px;
  }

  .package-strip div {
    padding: 14px 0;
    border-top: 1px solid #1f2a3b;
    border-left: 0;
  }

  .package-strip div:first-child {
    padding-left: 0;
  }

  .local-first {
    grid-template-columns: 1fr;
    gap: 20px;
    margin-top: 28px;
  }

  .getting-started {
    gap: 34px;
    padding: 28px;
  }

  .platform-note {
    text-align: left;
  }

  .faq-section {
    padding-top: 0;
  }

  .closing {
    align-items: flex-start;
    flex-direction: column;
    gap: 12px;
    padding-block: 12px 35px;
  }

  .closing > p {
    font-size: 23px;
  }

  .footer {
    flex-wrap: wrap;
    gap: 16px;
    padding-block: 24px;
  }

  .footer p {
    order: 3;
    width: 100%;
    font-size: 11px;
  }

  .footer > div {
    gap: 18px;
  }
}

@media (max-width: 520px) {
  h1 {
    font-size: 40px;
  }

  .actions .button {
    width: 100%;
  }

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

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

  .tool-row {
    grid-template-columns: 40px minmax(0, 1fr) auto;
  }

  .code-card pre {
    padding: 14px;
    font-size: 10.5px;
  }

  .panel-tabs {
    gap: 10px;
  }

  .footer > div {
    margin-left: 0;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  .button {
    transition: none;
  }
}

@media print {
  .header,
  .actions,
  .footer,
  .developer-actions {
    display: none;
  }

  body {
    background: #fff;
    color: #000;
  }

  .app-window,
  .feature-card,
  .philosophy-card,
  .chat-block,
  .extension-card,
  .getting-started {
    box-shadow: none;
  }
}