:root {
  --surface-ink: #17202c;
  --surface-soft: #526173;
  --surface-faint: #758398;
  --surface-line: #d8e0e9;
  --surface-paper: #ffffff;
  --surface-bg: #f3f6f8;
  --surface-blue: #2458f5;
  --surface-blue-dark: #123bbd;
  --surface-green: #0f8a68;
  --surface-amber: #a76c00;
  --surface-coral: #cf5142;
  --surface-shell: min(1120px, calc(100% - 40px));
  color: var(--surface-ink);
  background: var(--surface-bg);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-synthesis: none;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; color: var(--surface-ink); background: var(--surface-bg); line-height: 1.55; }
a { color: inherit; }
button, input { font: inherit; }
a:focus-visible, button:focus-visible { outline: 3px solid color-mix(in srgb, var(--surface-blue) 45%, white); outline-offset: 3px; }
.surface-shell { width: var(--surface-shell); margin-inline: auto; }
.surface-skip { position: fixed; z-index: 30; top: 8px; left: 8px; padding: 8px 12px; transform: translateY(-200%); border-radius: 5px; background: #fff; font-weight: 750; }
.surface-skip:focus { transform: translateY(0); }

.surface-header { position: sticky; z-index: 20; top: 0; border-bottom: 1px solid rgba(216, 224, 233, .94); background: rgba(255, 255, 255, .94); backdrop-filter: blur(12px); }
.surface-header-inner { display: grid; grid-template-columns: auto 1fr auto; align-items: center; gap: 28px; min-height: 62px; }
.surface-brand { display: inline-flex; align-items: center; gap: 9px; font-size: 18px; font-weight: 800; text-decoration: none; }
.surface-brand b { display: grid; width: 40px; height: 32px; place-items: center; border-radius: 5px; background: var(--surface-blue); color: #fff; font-size: 13px; }
.surface-header nav { display: flex; justify-content: center; gap: 22px; }
.surface-header nav a { color: var(--surface-soft); font-size: 13px; font-weight: 700; text-decoration: none; }
.surface-header nav a:hover { color: var(--surface-blue-dark); }
.surface-language { min-width: 52px; padding: 7px 10px; border: 1px solid var(--surface-line); border-radius: 5px; background: #fff; font-size: 13px; font-weight: 750; text-align: center; text-decoration: none; }

main.surface-shell { padding: 28px 0 78px; }
.surface-breadcrumbs { display: flex; gap: 8px; align-items: center; overflow: hidden; margin: 0 0 28px; color: var(--surface-faint); font-size: 12px; white-space: nowrap; }
.surface-breadcrumbs a { color: var(--surface-blue-dark); text-decoration: none; }
.surface-breadcrumbs span:last-child { overflow: hidden; text-overflow: ellipsis; }
.surface-hero { display: grid; grid-template-columns: minmax(0, 1fr) 300px; gap: 56px; align-items: end; padding: 42px 0 40px; border-top: 4px solid var(--surface-ink); border-bottom: 1px solid var(--surface-line); }
.surface-eyebrow, .surface-kicker { margin: 0 0 10px; color: var(--surface-blue-dark); font-family: "Cascadia Code", Consolas, monospace; font-size: 12px; font-weight: 800; letter-spacing: 0; text-transform: uppercase; }
.surface-hero h1 { max-width: 790px; margin: 0; font-size: 52px; line-height: 1.04; letter-spacing: 0; }
.surface-lede { max-width: 820px; margin: 19px 0 0; color: var(--surface-soft); font-size: 19px; line-height: 1.62; }
.surface-actions { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 24px; }
.surface-actions a { display: inline-flex; min-height: 42px; align-items: center; justify-content: center; padding: 0 15px; border: 1px solid var(--surface-line); border-radius: 5px; background: #fff; color: var(--surface-ink); font-size: 13px; font-weight: 750; text-decoration: none; }
.surface-actions a.primary { border-color: var(--surface-blue); background: var(--surface-blue); color: #fff; }
.surface-actions a:hover { border-color: var(--surface-blue); color: var(--surface-blue-dark); }
.surface-actions a.primary:hover { background: var(--surface-blue-dark); color: #fff; }
.surface-status { padding: 18px 0 2px 20px; border-left: 4px solid var(--surface-amber); }
.surface-status.curated { border-left-color: var(--surface-green); }
.surface-status.changed { border-left-color: var(--surface-coral); }
.surface-status.guide { border-left-color: var(--surface-blue); }
.surface-status span { display: block; color: var(--surface-faint); font-size: 12px; font-weight: 700; text-transform: uppercase; }
.surface-status strong { display: block; margin-top: 5px; font-size: 23px; line-height: 1.2; }
.surface-status p { margin: 9px 0 0; color: var(--surface-soft); font-size: 13px; }

.surface-facts { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); margin: 0; border-bottom: 1px solid var(--surface-line); }
.surface-facts > div { min-height: 130px; padding: 24px 26px; border-left: 1px solid var(--surface-line); }
.surface-facts > div:first-child { border-left: 0; }
.surface-facts dt { color: var(--surface-faint); font-size: 12px; font-weight: 700; text-transform: uppercase; }
.surface-facts dd { margin: 5px 0 0; font-family: "Cascadia Code", Consolas, monospace; font-size: 27px; font-weight: 800; }
.surface-facts small { display: block; margin-top: 4px; color: var(--surface-soft); }

.surface-install { display: grid; grid-template-columns: minmax(0, 1fr) minmax(380px, .9fr); gap: 38px; align-items: center; margin: 42px 0 0; padding: 25px; border: 1px solid #a8bfff; border-left: 5px solid var(--surface-blue); border-radius: 6px; background: #f8faff; }
.surface-install h2 { margin: 0; font-size: 26px; letter-spacing: 0; }
.surface-install p:not(.surface-kicker) { margin: 8px 0 0; color: var(--surface-soft); }
.surface-install > div:last-child { display: grid; gap: 9px; }
.surface-install code, .surface-section pre { display: block; overflow-wrap: anywhere; white-space: pre-wrap; }
.surface-install code { padding: 14px; border-radius: 5px; background: #192335; color: #a4efd9; font-family: "Cascadia Code", Consolas, monospace; font-size: 12px; }
.surface-install button { min-height: 42px; border: 0; border-radius: 5px; background: var(--surface-blue); color: #fff; font-size: 13px; font-weight: 780; cursor: pointer; }
.surface-install button:hover { background: var(--surface-blue-dark); }

.surface-content { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); margin-top: 58px; border-top: 1px solid var(--surface-line); border-bottom: 1px solid var(--surface-line); }
.surface-content.guide-content { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.surface-section { padding: 29px 30px 34px; border-left: 1px solid var(--surface-line); background: var(--surface-paper); }
.surface-section:nth-child(3n+1) { border-left: 0; }
.guide-content .surface-section:nth-child(3n+1) { border-left: 1px solid var(--surface-line); }
.guide-content .surface-section:nth-child(2n+1) { border-left: 0; }
.surface-section h2 { margin: 0 0 14px; font-size: 23px; line-height: 1.22; letter-spacing: 0; }
.surface-section p { margin: 12px 0 0; color: var(--surface-soft); }
.surface-section ul { margin: 15px 0 0; padding-left: 20px; color: var(--surface-soft); }
.surface-section li + li { margin-top: 9px; }
.surface-section pre { margin: 18px 0 0; padding: 15px; border-radius: 5px; background: #192335; color: #a4efd9; font-family: "Cascadia Code", Consolas, monospace; font-size: 12px; }
.surface-warning { display: grid; grid-template-columns: 230px minmax(0, 1fr); gap: 30px; margin-top: 34px; padding: 24px 28px; border: 1px solid #ead08a; border-radius: 6px; background: #fff8e5; }
.surface-warning strong { color: #765200; font-size: 18px; }
.surface-warning p { margin: 0; color: #675934; }

.surface-related { margin-top: 64px; }
.surface-related header { margin-bottom: 18px; }
.surface-related h2 { margin: 0; font-size: 30px; letter-spacing: 0; }
.surface-related > div { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 12px; }
.surface-related a { display: block; min-height: 150px; padding: 20px; border: 1px solid var(--surface-line); border-top: 4px solid var(--surface-blue); border-radius: 6px; background: #fff; text-decoration: none; }
.surface-related a:nth-child(2) { border-top-color: var(--surface-green); }
.surface-related a:nth-child(3) { border-top-color: var(--surface-coral); }
.surface-related strong { display: block; font-size: 17px; line-height: 1.3; }
.surface-related span { display: block; margin-top: 9px; color: var(--surface-soft); font-size: 13px; }
.surface-related a:hover { border-color: var(--surface-blue); }

.surface-footer { border-top: 1px solid var(--surface-line); background: #fff; }
.surface-footer > div { display: flex; justify-content: space-between; gap: 18px; padding: 24px 0 34px; color: var(--surface-faint); font-size: 12px; }
.surface-footer a { text-decoration: none; }
.surface-footer a:hover { color: var(--surface-blue-dark); text-decoration: underline; }

@media (max-width: 900px) {
  .surface-header nav a:nth-child(2), .surface-header nav a:nth-child(4) { display: none; }
  .surface-hero { grid-template-columns: 1fr; gap: 28px; }
  .surface-status { max-width: 520px; }
  .surface-content, .surface-content.guide-content { grid-template-columns: 1fr; }
  .surface-section, .surface-section:nth-child(3n+1), .guide-content .surface-section:nth-child(3n+1), .guide-content .surface-section:nth-child(2n+1) { border-top: 1px solid var(--surface-line); border-left: 0; }
  .surface-section:first-child { border-top: 0; }
  .surface-install { grid-template-columns: 1fr; }
}

@media (max-width: 620px) {
  :root { --surface-shell: calc(100% - 28px); }
  .surface-header-inner { grid-template-columns: 1fr auto; gap: 14px; min-height: 56px; }
  .surface-header nav { display: none; }
  main.surface-shell { padding-top: 20px; }
  .surface-breadcrumbs { margin-bottom: 18px; }
  .surface-hero { padding: 30px 0; }
  .surface-hero h1 { font-size: 38px; }
  .surface-lede { font-size: 17px; }
  .surface-facts { grid-template-columns: 1fr; }
  .surface-facts > div, .surface-facts > div:first-child { min-height: auto; padding: 18px 0; border-top: 1px solid var(--surface-line); border-left: 0; }
  .surface-facts > div:first-child { border-top: 0; }
  .surface-install { padding: 20px; }
  .surface-content { margin-top: 44px; }
  .surface-section { padding: 24px 20px 28px; }
  .surface-warning { grid-template-columns: 1fr; gap: 9px; padding: 21px; }
  .surface-related { margin-top: 50px; }
  .surface-related > div { grid-template-columns: 1fr; }
  .surface-related a { min-height: 0; }
  .surface-footer > div { align-items: flex-start; flex-direction: column; }
}

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