:root {
  --space-0: #020410;
  --space-1: #050a1c;
  --space-2: #0a1129;
  --space-3: #121b3a;
  --navy: #1e3c72;
  --royal: #2a5298;
  --gold: #ffd700;
  --gold-soft: #ffc233;
  --green: #27ae60;
  --green-glow: #6ee2a0;
  --text: #f1f4fa;
  --muted: rgba(241, 244, 250, 0.74);
  --soft: rgba(241, 244, 250, 0.52);
  --line: rgba(255, 255, 255, 0.12);
  --line-soft: rgba(255, 255, 255, 0.08);
  --white: #fff;
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --max-w: 1180px;
  --radius: 10px;
  --shadow: 0 1px 2px rgba(0, 0, 0, 0.4), 0 12px 30px rgba(0, 0, 0, 0.28);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  color: var(--text);
  background: var(--space-0);
  font: 18px/1.65 var(--font-sans);
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
a { color: inherit; }
img { max-width: 100%; display: block; }

.galaxy-bg {
  position: fixed;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  background:
    radial-gradient(ellipse 80% 50% at 20% 0%, rgba(42, 82, 152, 0.35) 0%, transparent 50%),
    radial-gradient(ellipse 60% 40% at 80% 30%, rgba(255, 215, 0, 0.08) 0%, transparent 55%),
    radial-gradient(ellipse 70% 50% at 50% 80%, rgba(94, 53, 177, 0.2) 0%, transparent 60%),
    linear-gradient(180deg, #020410 0%, #04081c 40%, #020410 100%);
}
.galaxy-bg::before {
  content: "";
  position: absolute;
  inset: 0;
  opacity: 0.85;
  background-repeat: repeat;
  background-size: 900px 900px;
  background-image:
    radial-gradient(1px 1px at 13% 22%, rgba(255,255,255,.9), transparent 60%),
    radial-gradient(1px 1px at 27% 58%, rgba(255,255,255,.7), transparent 60%),
    radial-gradient(1.2px 1.2px at 41% 11%, rgba(255,255,255,.9), transparent 60%),
    radial-gradient(1px 1px at 55% 77%, rgba(200,220,255,.7), transparent 60%),
    radial-gradient(1.5px 1.5px at 68% 33%, rgba(255,255,255,1), transparent 60%),
    radial-gradient(1px 1px at 79% 88%, rgba(255,255,255,.6), transparent 60%),
    radial-gradient(1.2px 1.2px at 92% 14%, rgba(220,235,255,.85), transparent 60%),
    radial-gradient(1px 1px at 8% 92%, rgba(255,255,255,.75), transparent 60%);
}

.container { width: 100%; max-width: var(--max-w); margin: 0 auto; padding: 0 24px; }
.skip {
  position: absolute;
  left: -9999px;
  top: 0;
  z-index: 100;
  padding: 12px 20px;
  color: var(--space-0);
  background: var(--white);
  border-radius: 0 0 var(--radius) 0;
  font-weight: 700;
}
.skip:focus { left: 0; }

.navbar {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(8, 12, 30, 0.78);
  border-bottom: 1px solid var(--line-soft);
  backdrop-filter: saturate(180%) blur(14px);
  -webkit-backdrop-filter: saturate(180%) blur(14px);
}
.nav-inner { min-height: 68px; display: flex; align-items: center; justify-content: space-between; gap: 18px; }
.brand { display: flex; align-items: center; gap: 12px; text-decoration: none; }
.brand-mark { width: 38px; height: 38px; flex: 0 0 auto; }
.brand-wordmark { display: flex; flex-direction: column; gap: 2px; line-height: 1; }
.brand-wordmark .wm-1 { color: var(--white); font-size: 1.12rem; font-weight: 800; }
.brand-wordmark .wm-2 { color: var(--green-glow); font-size: .66rem; font-weight: 600; letter-spacing: .16em; text-transform: uppercase; }
.nav-back { color: var(--muted); font-size: .94rem; font-weight: 600; text-decoration: none; }
.nav-back:hover, .nav-back:focus-visible { color: var(--white); }

.page-main { padding: 64px 0 96px; }
.breadcrumbs { margin: 0 0 28px; color: var(--soft); font-size: .86rem; }
.breadcrumbs a { color: var(--green-glow); text-decoration: underline; text-underline-offset: 3px; }
.page-intro { max-width: 850px; margin-bottom: 44px; }
.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 18px;
  padding: 6px 12px;
  color: rgba(255,255,255,.92);
  background: rgba(255,255,255,.08);
  border: 1px solid rgba(255,255,255,.18);
  border-radius: 999px;
  font-size: .8rem;
  font-weight: 700;
  letter-spacing: .04em;
  text-transform: uppercase;
}
.eyebrow::before { content: ""; width: 7px; height: 7px; background: var(--gold); border-radius: 50%; box-shadow: 0 0 0 3px rgba(255,215,0,.22); }
h1, h2, h3 { color: var(--white); line-height: 1.15; text-wrap: balance; }
h1 { max-width: 860px; margin: 0 0 20px; font-size: clamp(2.35rem, 5vw, 4rem); letter-spacing: -.035em; }
h2 { margin: 48px 0 14px; font-size: clamp(1.65rem, 3vw, 2.35rem); letter-spacing: -.025em; }
h3 { margin: 0 0 8px; font-size: 1.18rem; }
.lede { max-width: 760px; margin: 0; color: var(--muted); font-size: 1.2rem; }
.updated { margin: 20px 0 0; color: var(--soft); font-size: .92rem; }

.content-layout { display: grid; gap: 34px; align-items: start; }
@media (min-width: 900px) { .content-layout { grid-template-columns: 220px minmax(0, 1fr); } }
.toc { position: sticky; top: 94px; padding: 18px; background: rgba(10,17,41,.78); border: 1px solid var(--line); border-radius: var(--radius); }
.toc h2 { margin: 0 0 12px; color: var(--gold); font-size: .78rem; letter-spacing: .1em; text-transform: uppercase; }
.toc ul { display: grid; gap: 8px; margin: 0; padding: 0; list-style: none; }
.toc a { color: var(--muted); font-size: .9rem; text-decoration: none; }
.toc a:hover, .toc a:focus-visible { color: var(--white); }

.prose { min-width: 0; max-width: 820px; }
.prose p, .prose li { color: var(--muted); }
.prose p { margin: 0 0 18px; }
.prose h2 { scroll-margin-top: 96px; }
.prose ul, .prose ol { margin: 0 0 22px; padding-left: 1.35em; }
.prose li + li { margin-top: 8px; }
.prose strong { color: var(--text); }
.prose code { padding: 2px 6px; color: var(--green-glow); background: rgba(255,255,255,.07); border: 1px solid var(--line-soft); border-radius: 4px; font-size: .9em; }
.prose a, .content-card a { color: var(--green-glow); text-decoration: underline; text-underline-offset: 3px; }
.callout { margin: 0 0 34px; padding: 24px; background: linear-gradient(135deg, rgba(30,60,114,.8), rgba(10,17,41,.88)); border: 1px solid rgba(110,226,160,.28); border-radius: var(--radius); box-shadow: var(--shadow); }
.callout h2, .callout h3 { margin-top: 0; }
.callout p:last-child { margin-bottom: 0; }
.content-grid { display: grid; gap: 20px; }
@media (min-width: 700px) { .content-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); } }
@media (min-width: 1020px) { .content-grid.three { grid-template-columns: repeat(3, minmax(0, 1fr)); } }
.content-card { display: block; height: 100%; padding: 26px 24px; color: var(--text); background: rgba(10,17,41,.9); border: 1px solid var(--line); border-radius: var(--radius); box-shadow: var(--shadow); text-decoration: none; transition: transform .15s ease, border-color .15s ease; }
.content-card:hover, .content-card:focus-visible { transform: translateY(-2px); border-color: rgba(255,215,0,.42); }
.content-card .icon { display: block; margin-bottom: 14px; font-size: 1.8rem; line-height: 1; }
.content-card p { margin: 0; color: var(--muted); font-size: .98rem; }
.content-card .tag { display: inline-block; margin-bottom: 12px; color: var(--gold); font-size: .74rem; font-weight: 800; letter-spacing: .08em; text-transform: uppercase; }
.button-row { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 28px; }
.button { display: inline-flex; align-items: center; justify-content: center; min-height: 46px; padding: 11px 18px; color: var(--white); background: var(--green); border: 1px solid transparent; border-radius: 6px; font-size: .96rem; font-weight: 700; text-decoration: none; }
.button:hover, .button:focus-visible { background: #2ed372; }
.button.ghost { background: transparent; border-color: rgba(255,255,255,.38); }
.button.ghost:hover, .button.ghost:focus-visible { background: rgba(255,255,255,.08); border-color: rgba(255,255,255,.7); }
.share-box { margin-top: 38px; padding-top: 24px; border-top: 1px solid var(--line-soft); color: var(--soft); font-size: .94rem; }
.share-box a { color: var(--green-glow); }
.faq { display: grid; gap: 12px; margin-top: 18px; }
.faq details { padding: 16px 18px; background: rgba(10,17,41,.78); border: 1px solid var(--line); border-radius: 8px; }
.faq summary { cursor: pointer; color: var(--text); font-weight: 700; }
.faq p { margin: 12px 0 0; }

footer { padding: 46px 0 38px; border-top: 1px solid var(--line-soft); color: var(--soft); font-size: .92rem; }
.footer-links { display: flex; flex-wrap: wrap; gap: 10px 24px; margin: 0 0 26px; padding: 0; list-style: none; }
.footer-links a { color: var(--muted); text-decoration: none; }
.footer-links a:hover, .footer-links a:focus-visible { color: var(--white); }
.footer-bottom { display: flex; flex-direction: column; gap: 6px; padding-top: 22px; border-top: 1px solid var(--line-soft); }
@media (min-width: 760px) { .footer-bottom { flex-direction: row; justify-content: space-between; } }

.i18n-switcher { position: fixed; left: 16px; bottom: 16px; z-index: 9999; font: 500 14px/1.2 system-ui, -apple-system, "Segoe UI", sans-serif; }
.i18n-switcher > summary { cursor: pointer; padding: 9px 14px; color: var(--white); background: rgba(15,18,32,.92); border: 1px solid rgba(255,255,255,.18); border-radius: 999px; box-shadow: 0 4px 16px rgba(0,0,0,.28); }
.i18n-switcher > nav { position: absolute; bottom: calc(100% + 8px); left: 0; min-width: 140px; padding: 6px; background: rgba(15,18,32,.97); border: 1px solid rgba(255,255,255,.16); border-radius: 10px; box-shadow: 0 12px 30px rgba(0,0,0,.38); }
.i18n-switcher a { display: block; padding: 8px 10px; color: var(--green-glow); text-decoration: none; }
.i18n-switcher a:hover, .i18n-switcher a:focus-visible { color: var(--white); background: rgba(255,255,255,.08); border-radius: 6px; }

@media (max-width: 650px) {
  .page-main { padding-top: 44px; }
  .nav-inner { min-height: 60px; }
  .brand-wordmark .wm-2 { display: none; }
  .nav-back { font-size: .85rem; }
  .toc { position: static; }
}

@media print {
  .galaxy-bg, .navbar, .toc, .button-row, .share-box, .i18n-switcher { display: none; }
  body { color: #111; background: #fff; }
  h1, h2, h3, .prose p, .prose li { color: #111; }
  .page-main { padding: 0; }
}