:root {
  --workspace: #efeee9;
  --paper: #f8f7f3;
  --paper-strong: #ffffff;
  --ink: #1d2421;
  --muted: #66706b;
  --line: #cfd4cf;
  --line-dark: #aeb7b1;
  --green: #19734f;
  --green-soft: #dcece4;
  --blue: #2b64a2;
  --blue-soft: #e2ebf4;
  --amber: #ad6b18;
  --utility: "Cascadia Code", "SFMono-Regular", Consolas, "Liberation Mono", monospace;
  --body: "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  --display: "Arial Narrow", "Segoe UI", "Microsoft YaHei", sans-serif;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: 88px;
}

body {
  margin: 0;
  color: var(--ink);
  background: var(--workspace);
  font-family: var(--body);
  font-size: 16px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

a {
  color: inherit;
}

img {
  max-width: 100%;
}

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

:focus-visible {
  outline: 3px solid rgba(43, 100, 162, .34);
  outline-offset: 3px;
}

.tool-shell {
  width: min(1180px, calc(100% - 40px));
  margin-inline: auto;
}

.site-header {
  position: sticky;
  z-index: 20;
  top: 0;
  border-bottom: 1px solid var(--line-dark);
  background: rgba(248, 247, 243, .94);
  backdrop-filter: blur(14px);
}

.nav {
  min-height: 68px;
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 34px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--ink);
  font-family: var(--display);
  font-size: 20px;
  font-weight: 800;
  letter-spacing: -.02em;
  text-decoration: none;
}

.brand img {
  width: 30px;
  height: 30px;
  border-radius: 7px;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 5px;
}

.nav-links a {
  padding: 8px 11px;
  color: #4f5954;
  font-size: 14px;
  text-decoration: none;
}

.nav-links a:hover {
  color: var(--green);
  background: var(--green-soft);
}

.download-action {
  min-width: 104px;
  min-height: 40px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 8px 18px;
  border: 1px solid #12583d;
  color: #fff;
  background: var(--green);
  font-weight: 700;
  line-height: 1;
  text-decoration: none;
  white-space: nowrap;
  word-break: keep-all;
  writing-mode: horizontal-tb;
}

.download-action:hover {
  background: #125f41;
}

.tool-hero {
  padding: 72px 0 84px;
  border-bottom: 1px solid var(--line-dark);
}

.hero-intro {
  display: grid;
  grid-template-columns: minmax(0, 1.5fr) minmax(260px, .5fr);
  gap: 80px;
  align-items: end;
  margin-bottom: 34px;
}

.breadcrumb,
.section-path,
.file-label,
.workspace-bar,
.tree-title,
.platform-title,
.meta-key,
.support-code {
  font-family: var(--utility);
}

.breadcrumb {
  margin: 0 0 16px;
  color: var(--green);
  font-size: 13px;
  font-weight: 700;
}

.hero-intro h1 {
  max-width: 820px;
  margin: 0;
  font-family: var(--display);
  font-size: clamp(48px, 6vw, 82px);
  font-stretch: condensed;
  line-height: .98;
  letter-spacing: -.055em;
}

.hero-intro h1 span {
  color: var(--green);
}

.hero-summary {
  margin: 0;
  padding-left: 18px;
  border-left: 3px solid var(--blue);
  color: #4d5752;
  font-size: 17px;
}

.workbench {
  overflow: hidden;
  border: 1px solid var(--line-dark);
  background: var(--paper);
  box-shadow: 14px 14px 0 #d9d8d2;
}

.workspace-bar {
  min-height: 42px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  padding: 8px 14px;
  border-bottom: 1px solid var(--line-dark);
  background: #e5e5df;
  color: #58615c;
  font-size: 12px;
}

.window-marks {
  display: inline-flex;
  gap: 6px;
}

.window-marks i {
  width: 9px;
  height: 9px;
  display: block;
  border: 1px solid #88928c;
  border-radius: 50%;
}

.workspace-grid {
  display: grid;
  grid-template-columns: 210px minmax(0, 1fr) 240px;
  align-items: center;
  min-height: 560px;
}

.doc-tree,
.platform-manifest {
  height: 100%;
  min-height: 560px;
  align-self: stretch;
  padding: 25px 18px;
}

.doc-tree {
  border-right: 1px solid var(--line);
}

.platform-manifest {
  border-left: 1px solid var(--line);
}

.tree-title,
.platform-title {
  margin: 0 0 18px;
  color: var(--muted);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: .08em;
  text-transform: uppercase;
}

.tree-list,
.platform-list,
.settings-list,
.compat-list,
.file-index {
  margin: 0;
  padding: 0;
  list-style: none;
}

.tree-list li {
  position: relative;
  padding: 8px 6px 8px 27px;
  color: #5b655f;
  font-family: var(--utility);
  font-size: 12px;
}

.tree-list li::before {
  position: absolute;
  left: 5px;
  color: var(--blue);
  content: "└";
}

.tree-list .tree-root {
  color: var(--ink);
  background: var(--blue-soft);
  font-weight: 700;
}

.tree-list .tree-root::before {
  color: var(--green);
  content: "▾";
}

.preview-pane {
  align-self: center;
  padding: 34px 44px;
  text-align: center;
}

.preview-heading {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  margin-bottom: 20px;
  text-align: left;
}

.preview-heading strong {
  display: block;
  font-size: 18px;
}

.preview-heading span {
  color: var(--muted);
  font-family: var(--utility);
  font-size: 11px;
}

.preview-state {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  color: var(--green);
  font-family: var(--utility);
  font-size: 11px;
  font-style: normal;
}

.preview-state::before {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--green);
  content: "";
}

.hero-preview {
  margin: 0;
  align-self: center;
}

.hero-preview img {
  filter: saturate(.86) contrast(.98);
}

.platform-list li {
  display: grid;
  grid-template-columns: 16px 1fr;
  gap: 9px;
  align-items: start;
  padding: 12px 0;
  border-top: 1px solid var(--line);
}

.platform-list li::before {
  color: var(--green);
  font-family: var(--utility);
  font-weight: 800;
  content: "✓";
}

.platform-list strong,
.platform-list small {
  display: block;
}

.platform-list strong {
  font-family: var(--utility);
  font-size: 13px;
}

.platform-list small {
  margin-top: 2px;
  color: var(--muted);
  font-size: 12px;
}

.manifest-action {
  margin-top: 22px;
  width: 100%;
}

.tool-section {
  padding: 94px 0;
  border-bottom: 1px solid var(--line-dark);
}

.section-head {
  display: grid;
  grid-template-columns: 170px minmax(0, 1fr);
  gap: 34px;
  align-items: start;
  margin-bottom: 44px;
}

.section-path {
  margin: 8px 0 0;
  color: var(--blue);
  font-size: 12px;
}

.section-head h2,
.settings-copy h2,
.support-copy h2,
.final-copy h2 {
  margin: 0;
  font-family: var(--display);
  font-size: clamp(34px, 4vw, 54px);
  line-height: 1.08;
  letter-spacing: -.04em;
}

.section-head p:last-child {
  max-width: 700px;
  margin: 14px 0 0;
  color: var(--muted);
}

.connection-runbook {
  border-top: 2px solid var(--ink);
}

.runbook-row {
  display: grid;
  grid-template-columns: 90px 220px minmax(0, 1fr) 145px;
  gap: 24px;
  align-items: center;
  min-height: 116px;
  padding: 20px 10px;
  border-bottom: 1px solid var(--line);
}

.step-index {
  color: var(--green);
  font-family: var(--utility);
  font-size: 14px;
  font-weight: 800;
}

.runbook-row h3 {
  margin: 0;
  font-size: 19px;
}

.runbook-row p {
  margin: 0;
  color: var(--muted);
}

.step-result {
  justify-self: end;
  padding: 5px 9px;
  border: 1px solid var(--line-dark);
  color: #52605a;
  background: var(--paper);
  font-family: var(--utility);
  font-size: 11px;
  white-space: nowrap;
}

.settings-layout {
  display: grid;
  grid-template-columns: .8fr 1.2fr;
  gap: 80px;
  align-items: start;
}

.settings-copy {
  position: sticky;
  top: 112px;
}

.settings-copy > p {
  margin: 18px 0 24px;
  color: var(--muted);
}

.inline-link {
  color: var(--blue);
  font-weight: 700;
  text-underline-offset: 4px;
}

.settings-list {
  border-top: 2px solid var(--ink);
}

.settings-list li {
  display: grid;
  grid-template-columns: 150px 1fr;
  gap: 26px;
  padding: 23px 0;
  border-bottom: 1px solid var(--line);
}

.meta-key {
  color: var(--blue);
  font-size: 12px;
  font-weight: 700;
}

.settings-list strong {
  display: block;
  margin-bottom: 5px;
}

.settings-list p {
  margin: 0;
  color: var(--muted);
  font-size: 14px;
}

.compat-ledger {
  border: 1px solid var(--line-dark);
  background: var(--paper);
}

.compat-header,
.compat-list li {
  display: grid;
  grid-template-columns: 1fr 1.2fr 1.8fr;
  gap: 18px;
  padding: 15px 20px;
}

.compat-header {
  color: #59635e;
  background: #e5e5df;
  font-family: var(--utility);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: .05em;
}

.compat-list li {
  align-items: center;
  border-top: 1px solid var(--line);
}

.compat-list strong {
  font-family: var(--utility);
  font-size: 13px;
}

.compat-list span {
  color: var(--muted);
  font-size: 14px;
}

.status-tag {
  width: max-content;
  padding: 3px 8px;
  color: var(--green) !important;
  background: var(--green-soft);
  font-family: var(--utility);
  font-size: 11px !important;
}

.support-layout {
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(320px, .9fr);
  gap: 70px;
  align-items: center;
}

.support-visual {
  margin: 0;
  padding-right: 24px;
  border-right: 1px solid var(--line-dark);
  align-self: center;
}

.support-copy > p {
  margin: 18px 0 30px;
  color: var(--muted);
}

.support-routes {
  border-top: 2px solid var(--ink);
}

.support-routes a {
  display: grid;
  grid-template-columns: 74px 1fr auto;
  gap: 16px;
  align-items: center;
  padding: 17px 0;
  border-bottom: 1px solid var(--line);
  text-decoration: none;
}

.support-routes a:hover strong {
  color: var(--blue);
}

.support-code {
  color: var(--green);
  font-size: 11px;
}

.support-routes span:last-child {
  color: var(--blue);
}

.file-index {
  border-top: 2px solid var(--ink);
}

.file-index li {
  display: grid;
  grid-template-columns: 44px minmax(220px, .8fr) minmax(0, 1.2fr) 100px;
  gap: 22px;
  align-items: center;
  padding: 18px 10px;
  border-bottom: 1px solid var(--line);
}

.file-icon {
  color: var(--blue);
  font-family: var(--utility);
}

.file-index h3 {
  margin: 0;
  font-size: 16px;
}

.file-index p {
  margin: 0;
  color: var(--muted);
  font-size: 14px;
}

.file-index a {
  justify-self: end;
  color: var(--blue);
  font-family: var(--utility);
  font-size: 12px;
  font-weight: 700;
  text-underline-offset: 4px;
}

.final-strip {
  padding: 68px 0;
  color: #f4f5f1;
  background: var(--ink);
}

.final-layout {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 60px;
  align-items: center;
}

.final-copy h2 {
  max-width: 800px;
}

.final-copy p {
  margin: 12px 0 0;
  color: #b8c0bb;
}

.final-layout .download-action {
  border-color: #80bba0;
  background: #27835e;
}

.site-footer {
  padding: 56px 0 28px;
  color: #5a635e;
  background: #e2e1db;
}

.footer-grid {
  display: grid;
  grid-template-columns: minmax(260px, 2fr) 1fr 1fr;
  gap: 80px;
}

.footer-grid h2,
.footer-grid h3 {
  margin: 0 0 12px;
  color: var(--ink);
}

.footer-grid h2 {
  font-family: var(--display);
  font-size: 28px;
}

.footer-grid h3 {
  font-family: var(--utility);
  font-size: 12px;
  letter-spacing: .06em;
}

.footer-grid p {
  max-width: 430px;
  margin: 0;
}

.footer-grid a {
  width: max-content;
  display: block;
  margin: 8px 0;
  color: #555f59;
  text-decoration: none;
}

.footer-grid a:hover {
  color: var(--green);
}

.copyright {
  margin-top: 46px;
  padding-top: 18px;
  border-top: 1px solid var(--line-dark);
  font-family: var(--utility);
  font-size: 11px;
}

@media (max-width: 980px) {
  .workspace-grid {
    grid-template-columns: 180px minmax(0, 1fr);
  }

  .platform-manifest {
    grid-column: 1 / -1;
    min-height: auto;
    border-top: 1px solid var(--line);
    border-left: 0;
  }

  .platform-list {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: 12px;
  }

  .platform-list li {
    display: block;
  }

  .platform-list li::before {
    display: block;
    margin-bottom: 4px;
  }

  .manifest-action {
    width: max-content;
  }

  .runbook-row {
    grid-template-columns: 66px 180px minmax(0, 1fr);
  }

  .step-result {
    grid-column: 3;
    justify-self: start;
  }

  .settings-layout,
  .support-layout {
    gap: 44px;
  }
}

@media (max-width: 760px) {
  .tool-shell {
    width: min(100% - 28px, 1180px);
  }

  .nav {
    min-height: 62px;
    grid-template-columns: 1fr auto;
    gap: 14px;
  }

  .nav-links {
    grid-column: 1 / -1;
    order: 3;
    overflow-x: auto;
    padding-bottom: 8px;
  }

  .tool-hero {
    padding: 50px 0 62px;
  }

  .hero-intro,
  .section-head,
  .settings-layout,
  .support-layout,
  .final-layout {
    grid-template-columns: 1fr;
    gap: 26px;
  }

  .hero-intro h1 {
    font-size: clamp(42px, 14vw, 66px);
  }

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

  .doc-tree,
  .platform-manifest {
    min-height: auto;
    border: 0;
  }

  .doc-tree {
    border-bottom: 1px solid var(--line);
  }

  .platform-manifest {
    border-top: 1px solid var(--line);
  }

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

  .preview-pane {
    padding: 28px 20px;
  }

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

  .tool-section {
    padding: 68px 0;
  }

  .runbook-row {
    grid-template-columns: 50px 1fr;
    gap: 10px 16px;
    padding: 20px 0;
  }

  .runbook-row p,
  .step-result {
    grid-column: 2;
  }

  .settings-copy {
    position: static;
  }

  .compat-header {
    display: none;
  }

  .compat-list li {
    grid-template-columns: 1fr auto;
  }

  .compat-list li span:nth-child(2) {
    grid-column: 1 / -1;
    grid-row: 2;
  }

  .support-visual {
    padding: 0 0 24px;
    border-right: 0;
    border-bottom: 1px solid var(--line-dark);
  }

  .file-index li {
    grid-template-columns: 34px 1fr auto;
    gap: 12px;
  }

  .file-index p {
    grid-column: 2 / -1;
    grid-row: 2;
  }

  .file-index a {
    grid-column: 3;
    grid-row: 1;
  }

  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: 34px;
  }

  .footer-grid > div:first-child {
    grid-column: 1 / -1;
  }
}

@media (max-width: 480px) {
  .workspace-bar span:last-child {
    display: none;
  }

  .tree-list,
  .platform-list {
    grid-template-columns: 1fr;
  }

  .settings-list li {
    grid-template-columns: 1fr;
    gap: 8px;
  }

  .compat-list li {
    padding: 16px;
  }

  .support-routes a {
    grid-template-columns: 58px 1fr auto;
  }
}

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

/* Hero media invariants: natural ratio, centered, never stretched or cropped. */
.workbench .workspace-grid {
  align-items: center !important;
}

.workbench .preview-pane,
.workbench .hero-preview {
  align-self: center !important;
  height: auto !important;
  min-height: 0 !important;
  max-height: none !important;
  margin-top: 0 !important;
  margin-bottom: 0 !important;
  overflow: visible !important;
  transform: none !important;
  clip-path: none !important;
}

.workbench .hero-preview {
  padding: 0 !important;
}

.workbench .hero-preview img {
  display: block !important;
  width: 100% !important;
  height: auto !important;
  min-height: 0 !important;
  max-height: none !important;
  margin: 0 !important;
  padding: 0 !important;
  object-fit: contain !important;
  object-position: center !important;
  transform: none !important;
  clip-path: none !important;
}