/* ==========================================================================
   Prod Keys — static site stylesheet (lightweight build)
   One file, no JavaScript, no images. Flat colours only: no gradients, no
   glows, no box-shadows, no filter effects. Palette is white, near-black and
   a single accent so the browser paints the page in one pass.
   ========================================================================== */

:root {
  --accent: #5B4BDB;
  --accent-hover: #4536C4;
  --accent-soft: #6E5FE0;
  --text: #111111;
  --text-light: #555555;
  --bg: #FFFFFF;
  --bg-alt: #F7F7F7;
  --border: #E3E3E3;
  --border-bold: #111111;
  --font: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen, Ubuntu, Cantarell, "Helvetica Neue", Arial, sans-serif;
  --font-mono: ui-monospace, "SF Mono", "Fira Code", "Roboto Mono", Menlo, Consolas, monospace;
  --max-w: 1120px;
  --narrow: 760px;
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html { font-size: 16px; -webkit-text-size-adjust: 100%; scroll-behavior: smooth; scroll-padding-top: 84px; }

body {
  font-family: var(--font);
  color: var(--text);
  background: var(--bg);
  line-height: 1.65;
  overflow-x: hidden;
}

a { color: var(--accent); text-decoration: none; }
a:hover { color: var(--accent-hover); text-decoration: underline; }
img, svg { max-width: 100%; }
code, kbd, samp { font-family: var(--font-mono); font-size: 0.875em; }

.container { max-width: var(--max-w); margin: 0 auto; padding: 0 20px; }
.skip { position: absolute; left: -9999px; top: 0; background: var(--bg); color: var(--text); padding: 12px 18px; z-index: 999; font-weight: 700; }
.skip:focus { left: 0; }

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  font-family: var(--font-mono); font-size: 0.75rem; text-transform: uppercase;
  letter-spacing: 0.08em; padding: 11px 22px;
  border: 2px solid var(--border-bold); background: var(--bg); color: var(--text);
}
.btn:hover { background: var(--text); color: var(--bg); text-decoration: none; }
.btn-accent { background: var(--accent); border-color: var(--accent); color: #fff; }
.btn-accent:hover { background: var(--accent-hover); border-color: var(--accent-hover); color: #fff; }
.btn-ghost { border-color: var(--border); color: var(--text-light); background: transparent; }
.btn-ghost:hover { border-color: var(--border-bold); color: var(--text); background: var(--bg); }
.btn-sm { padding: 7px 14px; font-size: 0.6875rem; }
.btn-lg { padding: 14px 30px; font-size: 0.8125rem; }
.btn-row { display: flex; flex-wrap: wrap; gap: 10px; margin: 22px 0 0; }
a:focus-visible, button:focus-visible, summary:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }

/* ---------- Header ---------- */
.site-header { border-bottom: 2px solid var(--border-bold); background: var(--bg); position: sticky; top: 0; z-index: 100; }
.header-inner {
  display: flex; align-items: center; justify-content: space-between;
  flex-wrap: wrap; gap: 8px 24px; padding: 14px 20px;
  max-width: var(--max-w); margin: 0 auto;
}
.site-logo {
  font-size: 1.25rem; font-weight: 800; text-transform: uppercase;
  letter-spacing: -0.03em; color: var(--text); display: inline-flex;
  align-items: center; gap: 8px;
}
.site-logo span { color: var(--accent); }
.site-logo:hover { text-decoration: none; color: var(--text); }
.main-nav ul { display: flex; flex-wrap: wrap; list-style: none; gap: 4px 22px; align-items: center; }
.main-nav a {
  font-family: var(--font-mono); font-size: 0.75rem; text-transform: uppercase;
  letter-spacing: 0.08em; color: var(--text-light); padding: 4px 0; display: block;
  border-bottom: 2px solid transparent;
}
.main-nav a:hover, .main-nav a[aria-current="page"] { color: var(--text); border-bottom-color: var(--accent); text-decoration: none; }

/* ---------- Hero ---------- */
.hero { background: #111111; color: #fff; text-align: center; padding: 64px 0 56px; }
.hero-inner { display: flex; flex-direction: column; align-items: center; }
.hero-kicker {
  display: inline-flex; align-items: center; gap: 9px; font-family: var(--font-mono);
  font-size: 0.6875rem; text-transform: uppercase; letter-spacing: 0.14em;
  color: #CFCFCF; border: 1px solid #3A3A3A; padding: 7px 16px; margin-bottom: 22px;
}
.hero-dot { width: 7px; height: 7px; border-radius: 50%; background: var(--accent-soft); }
.hero-title {
  font-size: clamp(2rem, 4.6vw, 3.25rem); font-weight: 900; line-height: 1.06;
  letter-spacing: -0.035em; color: #fff; max-width: 24ch; margin-bottom: 16px;
}
.hero-ver { display: block; margin-top: 6px; color: #A99BFF; }
.hero-lead { color: #C9C9C9; font-size: 1.0625rem; max-width: 660px; margin: 0 auto 26px; }
.hero-actions { display: flex; gap: 12px; flex-wrap: wrap; justify-content: center; }
.hero-btn { padding: 14px 26px; }
.hero-btn-primary { border-color: var(--accent); background: var(--accent); color: #fff; }
.hero-btn-primary:hover { background: var(--accent-hover); border-color: var(--accent-hover); color: #fff; }
.hero-btn-outline { background: transparent; border-color: #666; color: #fff; }
.hero-btn-outline:hover { background: #fff; border-color: #fff; color: #111; }
.hero-version {
  font-family: var(--font-mono); font-size: 0.75rem; color: #A5A5A5;
  margin-top: 20px; text-transform: uppercase; letter-spacing: 0.06em;
}
.hero-version strong { color: #fff; }
.hero-chips { list-style: none; display: flex; gap: 10px; flex-wrap: wrap; justify-content: center; margin: 24px 0 0; padding: 0; }
.hero-chips li {
  font-family: var(--font-mono); font-size: 0.6875rem; text-transform: uppercase;
  letter-spacing: 0.06em; color: #CFCFCF; border: 1px solid #3A3A3A; padding: 6px 13px;
}

/* ---------- Quick answer (information-extraction zone) ---------- */
.answer {
  background: #fff; border: 2px solid var(--border-bold); border-top: none;
  padding: 26px 28px; text-align: left;
}
.answer h2 {
  font-family: var(--font-mono); font-size: 0.6875rem; text-transform: uppercase;
  letter-spacing: 0.1em; color: var(--accent); margin-bottom: 10px;
}
.answer p { font-size: 1.0625rem; color: var(--text); max-width: 62ch; }
.answer p + p { margin-top: 10px; }
.answer-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(180px, 1fr)); gap: 14px 22px; margin-top: 18px; }
.answer-grid dt {
  font-family: var(--font-mono); font-size: 0.625rem; text-transform: uppercase;
  letter-spacing: 0.08em; color: var(--text-light); margin-bottom: 2px;
}
.answer-grid dd { font-weight: 700; font-size: 0.9375rem; }

.answer--inline {
  border: 2px solid var(--border); border-left: 4px solid var(--accent);
  background: var(--bg-alt); padding: 22px 24px; margin: 0 0 32px; text-align: left;
}
.answer--inline h2 { color: var(--text-light); }
.answer--inline p { font-size: 1.0625rem; }

/* ---------- Breadcrumbs ---------- */
.crumbs {
  font-family: var(--font-mono); font-size: 0.6875rem; text-transform: uppercase;
  letter-spacing: 0.07em; color: var(--text-light); padding: 16px 0 0;
}
.crumbs ol { list-style: none; display: flex; flex-wrap: wrap; gap: 6px; }
.crumbs li + li::before { content: "/"; margin-right: 6px; color: #999; }

/* ---------- Page header ---------- */
.page-head { padding: 34px 0 30px; border-bottom: 2px solid var(--border); }
.page-head .kicker {
  font-family: var(--font-mono); font-size: 0.6875rem; text-transform: uppercase;
  letter-spacing: 0.1em; color: var(--accent); margin-bottom: 10px;
}
.page-head h1 { font-size: clamp(1.65rem, 3.4vw, 2.35rem); font-weight: 800; letter-spacing: -0.03em; line-height: 1.15; max-width: 34ch; }
.page-head .standfirst { margin-top: 14px; font-size: 1.0625rem; color: var(--text-light); max-width: var(--narrow); }

/* ---------- Sections ---------- */
.section { padding: 60px 0; }
.section-alt { background: var(--bg-alt); }
.section-title { font-size: 1.75rem; font-weight: 800; letter-spacing: -0.02em; margin-bottom: 12px; }
.section-subtitle {
  font-family: var(--font-mono); font-size: 0.75rem; text-transform: uppercase;
  letter-spacing: 0.08em; color: var(--text-light); margin-bottom: 26px;
}
.section > .container > p.intro { font-size: 1.0625rem; color: var(--text-light); max-width: var(--narrow); margin-bottom: 6px; }

/* ---------- Prose ---------- */
.content { max-width: var(--narrow); }
.content p { margin-bottom: 16px; color: var(--text-light); font-size: 1.0625rem; }
.content h2 { font-size: 1.5rem; font-weight: 800; letter-spacing: -0.02em; margin: 40px 0 12px; }
.content h3 { font-size: 1.125rem; font-weight: 700; margin: 26px 0 8px; }
.content h2:first-child, .content h3:first-child { margin-top: 0; }
.content ul, .content ol { margin: 0 0 18px 22px; color: var(--text-light); }
.content li { margin-bottom: 7px; font-size: 1.0625rem; }
.content strong { color: var(--text); }
.content code { background: var(--bg-alt); border: 1px solid var(--border); padding: 2px 6px; }
.content table code { background: transparent; border: none; padding: 0; }
.content a { text-decoration: underline; text-decoration-thickness: 1px; text-underline-offset: 2px; }
.content > p:first-of-type { font-size: 1.125rem; }

/* Table of contents */
.toc { border: 2px solid var(--border); padding: 20px 24px; margin: 0 0 34px; max-width: var(--narrow); }
.toc h2 { font-family: var(--font-mono); font-size: 0.6875rem; text-transform: uppercase; letter-spacing: 0.1em; margin: 0 0 10px; }
.toc ol { margin: 0 0 0 18px; }
.toc li { margin-bottom: 4px; font-size: 0.9375rem; }

/* ---------- Download table ---------- */
.download-section { padding: 56px 0 60px; }
.table-wrap { overflow-x: auto; border: 2px solid var(--border-bold); -webkit-overflow-scrolling: touch; }
.table-wrap table { width: 100%; border-collapse: collapse; font-size: 0.9375rem; }
.table-wrap th {
  background: var(--text); color: var(--bg); font-family: var(--font-mono);
  font-size: 0.6875rem; text-transform: uppercase; letter-spacing: 0.08em;
  padding: 12px 16px; text-align: left; white-space: nowrap;
}
.table-wrap td { padding: 11px 16px; border-bottom: 1px solid var(--border); vertical-align: middle; }
.table-wrap tr:last-child td { border-bottom: none; }
.table-wrap tr:hover td { background: var(--bg-alt); }
.table-wrap .badge {
  display: inline-block; font-family: var(--font-mono); font-size: 0.625rem;
  text-transform: uppercase; letter-spacing: 0.05em; background: var(--accent);
  color: #fff; padding: 2px 8px; vertical-align: middle; margin-left: 6px;
}
.table-wrap .badge-latest { background: #111111; }
.table-wrap .dl-link { font-family: var(--font-mono); font-weight: 700; font-size: 0.8125rem; }
.table-wrap .muted { color: #999; }
.answer .table-wrap { margin-top: 20px; }

/* Install paths */
.install-paths { margin-top: 34px; }
.install-paths h3 {
  font-family: var(--font-mono); font-size: 0.8125rem; text-transform: uppercase;
  letter-spacing: 0.05em; margin-bottom: 14px; font-weight: 700;
}
.path-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(190px, 1fr)); gap: 12px; }
.path-card { border: 1px solid var(--border); padding: 14px 16px; }
.path-card .os { font-weight: 700; font-size: 0.8125rem; margin-bottom: 4px; }
.path-card .path { font-family: var(--font-mono); font-size: 0.75rem; color: var(--text-light); word-break: break-all; }

/* ---------- Cards & grids ---------- */
.guide-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(250px, 1fr)); gap: 16px; margin-top: 26px; }
.guide-card { display: block; border: 2px solid var(--border); padding: 20px; color: var(--text); }
.guide-card:hover { border-color: var(--border-bold); color: var(--text); text-decoration: none; }
.guide-card strong { font-size: 1rem; display: block; }
.guide-card p { margin-top: 6px; font-size: 0.875rem; color: var(--text-light); }
.guide-tag { display: inline-block; font-family: var(--font-mono); font-size: 0.625rem; text-transform: uppercase; letter-spacing: 0.08em; color: var(--accent); margin-bottom: 10px; }

.steps-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.step-card { border: 2px solid var(--border); padding: 22px 20px; }
.step-num { display: block; font-family: var(--font-mono); font-size: 1.5rem; font-weight: 700; color: var(--accent); margin-bottom: 6px; }
.step-card h3 { font-size: 1.0625rem; margin-bottom: 6px; }
.step-card p { font-size: 0.9375rem; color: var(--text-light); }

.rel-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(260px, 1fr)); gap: 14px; margin-top: 22px; }
.rel-card { border: 1px solid var(--border); border-left: 3px solid var(--accent); padding: 16px 18px; display: block; color: var(--text); background: var(--bg); }
.rel-card:hover { border-color: var(--border-bold); border-left-color: var(--accent); text-decoration: none; color: var(--text); }
.rel-card strong { display: block; font-size: 0.9375rem; }
.rel-card span { display: block; margin-top: 4px; font-size: 0.875rem; color: var(--text-light); }

/* ---------- Native FAQ (no JS) ---------- */
.faq { max-width: var(--narrow); }
.faq details { border-bottom: 1px solid var(--border); }
.faq details[open] { padding-bottom: 18px; }
.faq summary {
  cursor: pointer; font-weight: 700; font-size: 1.0625rem; padding: 18px 30px 18px 0;
  list-style: none; position: relative;
}
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: "+"; position: absolute; right: 4px; top: 16px; font-size: 1.25rem; font-weight: 400; color: var(--text-light); }
.faq details[open] summary::after { content: "\2212"; }
.faq .faq-a { color: var(--text-light); margin-top: 12px; max-width: 68ch; }

/* ---------- CTA band ---------- */
.cta-band { background: #111111; color: #fff; padding: 52px 0; }
.cta-inner { display: flex; align-items: center; justify-content: space-between; gap: 32px; flex-wrap: wrap; }
.cta-band h2 { font-size: 1.5rem; font-weight: 800; letter-spacing: -0.02em; }
.cta-band p { margin-top: 8px; color: #C9C9C9; max-width: 500px; }
.cta-actions { display: flex; gap: 12px; flex-wrap: wrap; }
.cta-band .btn { border-color: #fff; background: transparent; color: #fff; }
.cta-band .btn:hover { background: #fff; color: #111; }
.cta-band .btn-accent { background: var(--accent); border-color: var(--accent); color: #fff; }
.cta-band .btn-accent:hover { background: var(--accent-hover); border-color: var(--accent-hover); color: #fff; }

/* ---------- Footer ---------- */
.site-footer { border-top: 2px solid var(--border-bold); padding: 48px 0 28px; margin-top: 0; }
.footer-grid { display: grid; grid-template-columns: 1.6fr 1fr 1fr 1fr; gap: 30px; }
.footer-brand .site-logo { margin-bottom: 12px; }
.footer-brand p { font-size: 0.875rem; color: var(--text-light); max-width: 300px; }
.footer-col h2 { font-family: var(--font-mono); font-size: 0.6875rem; text-transform: uppercase; letter-spacing: 0.08em; margin-bottom: 14px; }
.footer-col ul { list-style: none; }
.footer-col li { margin-bottom: 7px; }
.footer-col a { font-size: 0.875rem; color: var(--text-light); }
.footer-col a:hover { color: var(--text); }
.footer-bottom {
  margin-top: 32px; padding-top: 16px; border-top: 1px solid var(--border);
  font-family: var(--font-mono); font-size: 0.75rem; color: var(--text-light);
  display: flex; justify-content: space-between; flex-wrap: wrap; gap: 10px;
}
.footer-bottom a { color: var(--text-light); text-decoration: underline; }

/* ---------- 404 ---------- */
.page-404 { text-align: center; padding: 90px 20px; }
.page-404 h1 { font-size: clamp(3.5rem, 12vw, 6rem); font-weight: 900; color: var(--border); line-height: 1; }
.page-404 p { font-size: 1.125rem; color: var(--text-light); margin: 14px 0 26px; }

/* ---------- Responsive ---------- */
@media (max-width: 900px) {
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .steps-grid { grid-template-columns: 1fr; }
}
@media (max-width: 768px) {
  .hero { padding: 52px 0 46px; }
  .hero-title { font-size: 1.9rem; }
  .hero-lead { font-size: 1rem; }
  .hero-actions, .hero-btn { width: 100%; }
  .header-inner { padding: 12px 20px 10px; }
  /* One scrollable row instead of a wrapped block, so the sticky header stays
     short on phones and never eats a third of the viewport. */
  .main-nav { order: 3; width: 100%; border-top: 1px solid var(--border); padding-top: 8px; }
  .main-nav ul { gap: 0 18px; flex-wrap: nowrap; overflow-x: auto; -webkit-overflow-scrolling: touch; scrollbar-width: none; }
  .main-nav ul::-webkit-scrollbar { display: none; }
  .main-nav a { font-size: 0.6875rem; white-space: nowrap; }
  .header-cta { order: 2; }
  .page-head h1 { font-size: 1.55rem; }
  .section-title { font-size: 1.375rem; }
  .answer { padding: 20px 18px; }
  .cta-inner { flex-direction: column; align-items: flex-start; }
  .table-wrap { font-size: 0.875rem; }
  .table-wrap th, .table-wrap td { padding: 9px 11px; }
  .crumbs { padding-top: 12px; }
}
@media (max-width: 480px) {
  html { scroll-padding-top: 150px; }
  .footer-grid { grid-template-columns: 1fr; }
  .section { padding: 40px 0; }
  .hero { padding: 40px 0 34px; }
  .btn { width: 100%; }
  .btn-row .btn { width: 100%; }
}