:root {
  --ink: #101114;
  --ink-2: #191b20;
  --ink-3: #22252b;
  --text: #fffaf0;
  --paper: #f4f1e8;
  --muted: #d0c9bb;
  --cyan: #67d8e3;
  --cyan-2: #9cebf2;
  --green: #8bd49b;
  --amber: #e3bc68;
  --rust: #e0906f;
  --line: rgba(244, 241, 232, .17);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background:
    radial-gradient(circle at 12% 0, rgba(103,216,227,.09), transparent 28rem),
    var(--ink);
  color: var(--text);
  font-family: ui-sans-serif, system-ui, -apple-system, "Segoe UI", sans-serif;
  font-size: 17px;
  line-height: 1.68;
  -webkit-font-smoothing: antialiased;
}
a { color: var(--cyan); }
a:hover { color: var(--cyan-2); }
img { max-width: 100%; }
.wrap { width: min(1120px, calc(100% - 40px)); margin: 0 auto; }
.skip-link {
  position: fixed; left: 16px; top: -80px; z-index: 1000;
  background: var(--cyan); color: #081014; padding: 10px 14px; font-weight: 750;
}
.skip-link:focus { top: 12px; }

.site-header {
  position: fixed; inset: 0 0 auto; z-index: 100;
  border-bottom: 1px solid var(--line);
  background: rgba(16,17,20,.9);
  backdrop-filter: blur(18px);
}
.site-nav { min-height: 68px; display: flex; align-items: center; justify-content: space-between; gap: 24px; }
.brand { display: inline-flex; align-items: center; gap: 11px; color: var(--text); text-decoration: none; font-weight: 760; }
.mark {
  width: 32px; height: 32px; display: grid; place-items: center;
  border: 1px solid rgba(103,216,227,.55); color: var(--cyan); background: #14191d;
}
.mark svg { width: 18px; height: 18px; }
.nav-links { display: flex; align-items: center; gap: 22px; font-size: 14px; }
.nav-links a { color: var(--muted); text-decoration: none; }
.nav-links a:hover, .nav-links a[aria-current="page"] { color: var(--text); }
.button {
  display: inline-flex; align-items: center; justify-content: center; min-height: 44px;
  padding: 0 18px; border: 1px solid var(--cyan); border-radius: 10px;
  background: var(--cyan); color: #081014 !important; text-decoration: none; font-weight: 760;
}
.button:hover { background: var(--cyan-2); border-color: var(--cyan-2); }
.nav-menu { display: none; position: relative; }
.nav-menu summary { cursor: pointer; color: var(--text); font-weight: 700; list-style: none; padding: 8px; }
.nav-menu summary::-webkit-details-marker { display: none; }
.nav-menu-panel {
  position: absolute; right: 0; top: 46px; width: 220px; padding: 10px;
  display: grid; gap: 4px; background: var(--ink-2); border: 1px solid var(--line); border-radius: 12px;
  box-shadow: 0 18px 50px rgba(0,0,0,.45);
}
.nav-menu-panel a { padding: 10px 12px; color: var(--text); text-decoration: none; border-radius: 7px; }
.nav-menu-panel a:hover { background: rgba(103,216,227,.09); }

main { padding-top: 68px; }
.guide-hero { padding: clamp(76px, 10vw, 128px) 0 58px; text-align: center; }
.guide-hero.article-hero { text-align: left; padding-bottom: 38px; }
.eyebrow {
  margin: 0 0 14px; color: var(--cyan); font-size: 14px; font-weight: 780;
  letter-spacing: .14em; text-transform: uppercase;
}
h1, h2, h3 { color: var(--text); text-wrap: balance; }
h1 {
  margin: 0 auto 20px; max-width: 21ch; font-family: ui-serif, Georgia, serif;
  font-size: clamp(38px, 6vw, 68px); font-weight: 560; line-height: 1.02;
}
.article-hero h1 { margin-left: 0; max-width: 18ch; font-size: clamp(37px, 5.2vw, 62px); }
.lede { max-width: 690px; margin: 0 auto; color: var(--paper); font-size: clamp(18px, 2vw, 22px); line-height: 1.58; }
.article-hero .lede { margin-left: 0; }
.breadcrumb { margin: 0 0 24px; color: var(--muted); font-size: 14px; }
.breadcrumb a { color: var(--muted); }
.byline { margin: 22px 0 0; color: var(--muted); font-size: 14px; }

.hub-intro {
  max-width: 760px; margin: 0 auto 38px; padding: 22px 24px;
  border-left: 3px solid var(--cyan); background: rgba(103,216,227,.055); color: var(--paper);
}
.guide-grid {
  display: grid; grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px; padding-bottom: 72px;
}
.guide-card {
  min-height: 290px; padding: 26px; display: flex; flex-direction: column;
  color: var(--text); text-decoration: none; background: var(--ink-2);
  border: 1px solid var(--line); border-top: 3px solid rgba(103,216,227,.65); border-radius: 14px;
  transition: transform .2s ease, border-color .2s ease, background .2s ease;
}
.guide-card:nth-child(3n+2) { border-top-color: rgba(139,212,155,.75); }
.guide-card:nth-child(3n) { border-top-color: rgba(227,188,104,.8); }
.guide-card:hover { transform: translateY(-4px); border-color: var(--cyan); background: var(--ink-3); color: var(--text); }
.card-number { color: var(--cyan); font: 750 14px/1 ui-monospace, SFMono-Regular, Menlo, monospace; }
.guide-card h2 { margin: 28px 0 12px; font: 560 25px/1.18 ui-serif, Georgia, serif; }
.guide-card p { margin: 0; color: var(--muted); font-size: 16px; }
.read-more { margin-top: auto; padding-top: 24px; color: var(--cyan); font-weight: 760; font-size: 14px; }
.more-guides { padding: 42px 0 72px; border-top: 1px solid var(--line); }
.more-guides h2 { margin: 0 0 18px; font: 560 30px/1.15 ui-serif, Georgia, serif; }
.more-links { display: flex; flex-wrap: wrap; gap: 10px; }
.more-links a { padding: 10px 14px; color: var(--paper); text-decoration: none; border: 1px solid var(--line); border-radius: 9px; }
.more-links a:hover { border-color: var(--cyan); }

.article { width: min(900px, calc(100% - 40px)); margin: 0 auto; padding-bottom: 80px; }
.article > section { padding: 34px 0; border-top: 1px solid var(--line); }
.article h2 { margin: 0 0 16px; font: 560 clamp(27px, 4vw, 38px)/1.13 ui-serif, Georgia, serif; }
.article h3 { margin: 26px 0 8px; font-size: 20px; }
.article p, .article li { color: var(--paper); }
.article li + li { margin-top: 8px; }
.answer-box {
  margin: 0 0 34px; padding: 22px 24px; border: 1px solid rgba(103,216,227,.45);
  border-left: 4px solid var(--cyan); border-radius: 10px; background: rgba(103,216,227,.06);
  color: var(--text); font-size: 19px;
}
.at-a-glance { display: grid; grid-template-columns: repeat(3, 1fr); gap: 10px; }
.glance-item { padding: 18px; background: var(--ink-2); border: 1px solid var(--line); border-radius: 10px; }
.glance-item strong { display: block; margin-bottom: 6px; color: var(--cyan); font-size: 15px; }
.steps { counter-reset: step; list-style: none; padding: 0; margin: 0; }
.steps > li { position: relative; padding: 0 0 26px 58px; min-height: 46px; }
.steps > li::before {
  counter-increment: step; content: counter(step); position: absolute; left: 0; top: 2px;
  width: 36px; height: 36px; display: grid; place-items: center; border: 1px solid var(--cyan);
  color: var(--cyan); font: 760 14px/1 ui-monospace, SFMono-Regular, Menlo, monospace;
}
.steps h3 { margin: 0 0 6px; }
.checklist { list-style: none; padding: 0; columns: 2; column-gap: 34px; }
.checklist li { break-inside: avoid; position: relative; padding-left: 28px; margin: 0 0 12px; }
.checklist li::before { content: "□"; position: absolute; left: 0; color: var(--cyan); font-weight: 800; }
.table-wrap { overflow-x: auto; border: 1px solid var(--line); border-radius: 11px; }
table { width: 100%; min-width: 650px; border-collapse: collapse; background: var(--ink-2); font-size: 15px; }
th, td { padding: 13px 15px; text-align: left; vertical-align: top; border-bottom: 1px solid var(--line); }
th { color: var(--cyan); background: #121418; }
td { color: var(--paper); }
tbody tr:last-child td { border-bottom: 0; }
.pill { display: inline-block; padding: 2px 9px; border-radius: 999px; font-size: 13px; font-weight: 760; }
.pill.supported { color: var(--green); background: rgba(139,212,155,.14); }
.pill.review { color: var(--amber); background: rgba(227,188,104,.14); }
.pill.unknown { color: var(--muted); background: rgba(208,201,187,.12); }
.example {
  padding: 22px 24px; border: 1px solid var(--line); border-radius: 12px;
  background: linear-gradient(145deg, rgba(103,216,227,.07), rgba(255,255,255,.02));
}
.example-label { margin: 0 0 12px !important; color: var(--cyan) !important; font: 760 13px/1.2 ui-monospace, SFMono-Regular, Menlo, monospace; text-transform: uppercase; letter-spacing: .08em; }
.mistakes { border-left: 3px solid var(--rust); padding-left: 22px; }
.faq { margin: 0; }
.faq dt { margin-top: 22px; color: var(--text); font-weight: 760; }
.faq dd { margin: 7px 0 0; color: var(--paper); }
.sources { font-size: 15px; }
.sources li { overflow-wrap: anywhere; }
.change-note { color: var(--muted) !important; font-size: 14px; }
.cta-band {
  margin-top: 28px; padding: 28px; display: flex; justify-content: space-between; align-items: center; gap: 22px;
  background: var(--ink-2); border: 1px solid rgba(103,216,227,.4); border-radius: 13px;
}
.cta-band h2 { margin-bottom: 7px; }
.cta-band p { margin: 0; color: var(--muted); }
.related-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 10px; }
.related-grid a { padding: 16px; color: var(--paper); text-decoration: none; border: 1px solid var(--line); border-radius: 9px; background: var(--ink-2); }
.related-grid a:hover { border-color: var(--cyan); color: var(--text); }

footer { padding: 28px 0; color: var(--muted); font-size: 14px; border-top: 1px solid var(--line); }
footer a { color: var(--muted); }
footer a:hover { color: var(--text); }
:focus-visible { outline: 3px solid var(--cyan); outline-offset: 3px; }

@media (max-width: 860px) {
  .nav-links { display: none; }
  .nav-menu { display: block; }
  .guide-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .at-a-glance, .related-grid { grid-template-columns: 1fr; }
}
@media (max-width: 768px) {
  body { font-size: 16px; overflow-x: hidden; }
  .wrap, .article { width: min(100% - 30px, 900px); }
  .guide-hero { padding-top: 68px; }
  .guide-grid { grid-template-columns: 1fr; }
  .guide-card { min-height: 0; }
  .checklist { columns: 1; }
  .cta-band { align-items: flex-start; flex-direction: column; }
  .cta-band .button { width: 100%; }
}
@media (max-width: 420px) {
  .site-nav { min-height: 62px; }
  main { padding-top: 62px; }
  h1, .article-hero h1 { font-size: 35px; }
  .article > section { padding: 28px 0; }
  .answer-box, .example, .cta-band { padding: 19px; }
  .steps > li { padding-left: 48px; }
  .more-links { display: grid; }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .guide-card { transition: none; }
}