:root {
  --bg: #f5f5f7; --text: #1d1d1f; --text2: #5a5a5f; --text3: #6e6e73;
  --line: rgba(0,0,0,.08); --card: #ffffff; --accent: #0066cc;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; background: var(--bg); color: var(--text); font-family: -apple-system, BlinkMacSystemFont, "SF Pro Text", "Segoe UI", Roboto, "Noto Sans", "Helvetica Neue", Arial, sans-serif; -webkit-font-smoothing: antialiased; font-optical-sizing: auto; font-synthesis: none; }
::selection { background: rgba(0,102,204,.18); }
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }
.nav { position: sticky; top: 0; z-index: 20; backdrop-filter: saturate(160%) blur(18px); background: rgba(245,245,247,.88); border-bottom: 1px solid var(--line); }
.nav-in { max-width: 1100px; margin: 0 auto; padding: 0 24px; height: 52px; display: flex; align-items: center; gap: 24px; }
.brand { display: flex; align-items: center; gap: 9px; color: var(--text); font-size: 14px; font-weight: 600; letter-spacing: -.01em; text-decoration: none; }
.brand img { width: 22px; height: 22px; border-radius: 6px; }
.nav-links { margin-left: auto; display: flex; align-items: center; gap: 22px; font-size: 13px; color: var(--text2); }
.nav-links a { color: inherit; }
.nav-links a:hover { color: var(--text); text-decoration: none; }
.nav-cta { background: var(--text); color: #fff !important; padding: 7px 13px; border-radius: 980px; font-weight: 500; }
.doc { max-width: 820px; margin: 0 auto; padding: 84px 24px 100px; }
.doc h1 { margin: 0 0 18px; font-size: clamp(38px, 5vw, 62px); line-height: 1.02; letter-spacing: -.04em; font-weight: 600; }
.doc .lede { max-width: 700px; margin: 0 0 38px; color: var(--text2); font-size: 18px; line-height: 1.6; }
.doc h2 { margin: 38px 0 10px; font-size: 22px; line-height: 1.25; letter-spacing: -.02em; font-weight: 600; }
.doc p, .doc li { color: var(--text2); font-size: 16px; line-height: 1.7; }
.doc p { margin: 0 0 14px; }
.doc ul { margin: 0 0 18px; padding-left: 22px; }
.doc li { margin: 6px 0; }
.doc .meta { margin-top: 34px; color: var(--text3); font-size: 12px; }
.doc .card { background: var(--card); border: 1px solid var(--line); border-radius: 18px; padding: 28px; margin: 24px 0; }
.doc .btn { display: inline-flex; align-items: center; justify-content: center; gap: 8px; border-radius: 980px; padding: 12px 21px; font-size: 14px; font-weight: 500; text-decoration: none; }
.doc .btn-primary { background: var(--text); color: #fff; }
.doc .btn-secondary { background: rgba(0,0,0,.055); color: var(--text); }
.doc .actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 22px; }
.foot { border-top: 1px solid var(--line); padding: 26px 24px 34px; text-align: center; font-size: 12px; color: var(--text3); }
.foot p { margin: 6px 0; }
.foot a { color: var(--text2); margin: 0 8px; }
.foot-note { color: var(--text3); }
code.key { display: block; margin: 12px 0 4px; padding: 14px 16px; border-radius: 10px; border: 1px solid var(--line); background: #f5f5f7; color: var(--text); font-family: "SF Mono", ui-monospace, Menlo, monospace; font-size: 13px; overflow-wrap: anywhere; }
.copy { border: 0; background: none; color: var(--accent); font: inherit; font-size: 13px; font-weight: 600; cursor: pointer; padding: 0; }
@media (max-width: 640px) {
  .nav-links a:not(.nav-cta) { display: none; }
  .doc { padding-top: 56px; }
}