:root {
  --bg: #0a0e14;
  --panel: #10161f;
  --panel-2: #141c28;
  --panel-3: #182331;
  --border: #263344;
  --text: #e6edf3;
  --muted: #a1afbf;
  --muted-2: #76879a;
  --green: #34d399;
  --green-dark: #0c3a2c;
  --cyan: #22d3ee;
  --cyan-dark: #103b48;
  --yellow: #fbbf24;
  --radius: 14px;
  --shadow: 0 18px 50px rgba(0, 0, 0, 0.22);
}

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

html {
  scroll-behavior: smooth;
  background: var(--bg);
}

body {
  background: var(--bg);
  color: var(--text);
  font: 16px/1.65 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  -webkit-font-smoothing: antialiased;
}

code, kbd, .mono {
  font-family: ui-monospace, "Cascadia Code", Consolas, "SF Mono", Menlo, monospace;
}

a { color: var(--cyan); text-decoration: underline; text-underline-offset: 2px; }
a:hover { text-decoration: underline; }
.logo:hover, .nav-links a:hover, .btn:hover, .text-link:hover, .footer-links a:hover, .footer-bottom a:hover { text-decoration: none; }
.logo, .nav-links a, .btn, .text-link, .footer-links a, .footer-bottom a { text-decoration: none; }

:focus-visible {
  outline: 3px solid var(--cyan);
  outline-offset: 4px;
  border-radius: 4px;
}

.wrap { width: min(100% - 48px, 1080px); margin-inline: auto; }

.skip-link {
  position: fixed;
  z-index: 100;
  top: 12px;
  left: 16px;
  padding: 9px 14px;
  color: #06251c;
  background: var(--green);
  border-radius: 8px;
  font-weight: 700;
  transform: translateY(-180%);
  transition: transform 0.15s ease;
}
.skip-link:focus { transform: translateY(0); }

/* Header and navigation */
.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  background: rgba(10, 14, 20, 0.9);
  border-bottom: 1px solid var(--border);
  backdrop-filter: blur(12px);
}
.site-header .wrap {
  min-height: 64px;
  display: flex;
  align-items: center;
  gap: 20px;
}
.logo {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
  color: var(--text);
  font-size: 16px;
  font-weight: 750;
  letter-spacing: -0.01em;
}
.logo:hover { text-decoration: none; }
.logo svg { display: block; }
.edition-mark {
  display: inline-block;
  margin-left: 4px;
  padding: 2px 7px;
  color: var(--green);
  border: 1px solid var(--green-dark);
  border-radius: 999px;
  font: 700 10px/1.4 ui-monospace, "Cascadia Code", Consolas, monospace;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  vertical-align: 2px;
}
.nav-links {
  display: flex;
  align-items: center;
  gap: 18px;
  margin-left: auto;
  color: var(--muted);
  font-size: 14px;
}
.nav-links a { color: var(--muted); }
.nav-links a:hover { color: var(--text); text-decoration: none; }
.nav-source { flex-shrink: 0; }

/* Shared controls */
.btn {
  display: inline-flex;
  min-height: 44px;
  align-items: center;
  justify-content: center;
  gap: 7px;
  padding: 10px 18px;
  border: 1px solid transparent;
  border-radius: 10px;
  color: var(--text);
  font-size: 15px;
  font-weight: 700;
  line-height: 1.25;
  text-align: center;
  transition: transform 0.12s ease, filter 0.15s ease, border-color 0.15s ease;
}
.btn:hover { transform: translateY(-1px); filter: brightness(1.08); text-decoration: none; }
.btn-primary { color: #06251c; background: var(--green); }
.btn-secondary { color: var(--text); background: var(--panel-2); border-color: var(--border); }
.btn-small { min-height: 36px; padding: 7px 12px; font-size: 13px; }
.btn:disabled,
.download-action[aria-disabled="true"] { cursor: not-allowed; opacity: 0.52; filter: none; transform: none; }
.text-link { color: var(--cyan); font-size: 14px; font-weight: 700; white-space: nowrap; }
.text-link:hover { text-decoration: underline; }

/* Hero */
.hero { padding: 88px 0 60px; text-align: center; }
.eyebrow {
  display: inline-block;
  color: var(--green);
  font: 700 12px/1.5 ui-monospace, "Cascadia Code", Consolas, monospace;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}
.hero h1 {
  max-width: 850px;
  margin: 20px auto 18px;
  color: var(--text);
  font-size: clamp(36px, 6vw, 62px);
  font-weight: 800;
  letter-spacing: -0.045em;
  line-height: 1.08;
}
.grad {
  color: var(--green);
  text-shadow: 0 0 22px rgba(34, 211, 238, 0.2);
}
.lead { max-width: 700px; margin: 0 auto 28px; color: var(--muted); font-size: 19px; line-height: 1.6; }
.actions { display: flex; justify-content: center; flex-wrap: wrap; gap: 12px; }
.hero-note { max-width: 660px; margin: 18px auto 0; color: var(--muted-2); font-size: 13px; }
.quick-facts {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
  max-width: 800px;
  margin: 38px auto 0;
  text-align: left;
}
.fact {
  display: flex;
  align-items: flex-start;
  gap: 11px;
  padding: 14px;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 12px;
}
.fact-icon { position: relative; flex: 0 0 20px; width: 20px; height: 20px; }
.fact-icon::before { position: absolute; inset: 3px; border: 2px solid var(--green); border-radius: 50%; content: ""; }
.fact:nth-child(2) .fact-icon::before { border-radius: 4px; transform: rotate(45deg); }
.fact strong, .fact small { display: block; }
.fact strong { font-size: 14px; }
.fact small { margin-top: 3px; color: var(--muted); font-size: 12px; line-height: 1.4; }
.key-row {
  display: flex;
  align-items: center;
  justify-content: center;
  flex-wrap: wrap;
  gap: 5px;
  margin-top: 30px;
  color: var(--muted);
  font-size: 13px;
}
kbd {
  display: inline-block;
  min-width: 25px;
  padding: 3px 8px;
  color: var(--text);
  background: var(--panel-2);
  border: 1px solid var(--border);
  border-bottom-width: 3px;
  border-radius: 6px;
  font-size: 12px;
  line-height: 1.25;
  text-align: center;
}
.key-row > span:not(.key-separator) { color: var(--muted-2); }
.key-separator { margin: 0 7px; color: var(--muted-2); }

/* Notices and section headings */
.notice-section { padding: 0 0 22px; }
.notice-card {
  display: flex;
  gap: 14px;
  padding: 19px 22px;
  background: #12211f;
  border: 1px solid #245245;
  border-radius: var(--radius);
}
.notice-mark {
  display: grid;
  flex: 0 0 26px;
  width: 26px;
  height: 26px;
  place-items: center;
  color: #06251c;
  background: var(--green);
  border-radius: 50%;
  font-weight: 900;
}
.notice-card h2 { margin: 0 0 4px; font-size: 17px; text-align: left; letter-spacing: 0; }
.notice-card p { color: var(--muted); font-size: 14px; }
section { padding: 72px 0; }
section.alt { background: var(--panel); border-top: 1px solid var(--border); border-bottom: 1px solid var(--border); }
h2 { color: var(--text); font-size: clamp(27px, 4vw, 38px); line-height: 1.15; letter-spacing: -0.025em; text-align: center; }
.sub { max-width: 720px; margin: 12px auto 36px; color: var(--muted); font-size: 16px; text-align: center; }
.section-heading { display: flex; align-items: end; justify-content: space-between; gap: 20px; }
.section-heading h2 { text-align: left; }
.section-heading .eyebrow { margin-bottom: 7px; }

/* Feature cards */
.feature-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; }
.card, .requirement-card {
  padding: 22px;
  background: var(--panel-2);
  border: 1px solid var(--border);
  border-radius: var(--radius);
}
.card { min-height: 168px; }
.card-icon { position: relative; width: 22px; height: 22px; margin-bottom: 9px; }
.card-icon::before { position: absolute; inset: 3px; border: 2px solid var(--cyan); border-radius: 4px; content: ""; transform: rotate(45deg); }
.card:nth-child(3) .card-icon::before { border-radius: 50%; transform: none; }
.card:nth-child(4) .card-icon::before { border-radius: 50%; box-shadow: 5px 0 0 -3px var(--cyan); transform: none; }
.card:nth-child(5) .card-icon::before { border-radius: 50%; border-style: dashed; transform: none; }
.card:nth-child(6) .card-icon::before { border-radius: 50% 0; transform: rotate(45deg); }
.card h3, .requirement-card h3 { margin-bottom: 8px; font-size: 17px; }
.card p, .requirement-card p { color: var(--muted); font-size: 14px; }

/* Download cards */
.release-status {
  width: fit-content;
  max-width: 100%;
  margin: 0 auto 22px;
  padding: 9px 15px;
  border: 1px solid var(--border);
  border-radius: 999px;
  color: var(--muted);
  background: var(--bg);
  font-size: 13px;
  text-align: center;
}
.status-placeholder { color: var(--yellow); border-color: rgba(251, 191, 36, 0.35); }
.status-published { color: var(--green); border-color: rgba(52, 211, 153, 0.4); }
.release-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.release-card {
  padding: 25px;
  background: var(--panel-2);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}
.release-card-header { display: flex; align-items: center; gap: 13px; }
.os-mark {
  position: relative;
  flex: 0 0 44px;
  width: 44px;
  height: 44px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 12px;
}
.os-mark::before { position: absolute; inset: 12px; border: 2px solid var(--green); border-radius: 4px; content: ""; }
[data-platform-card="macos-apple-silicon"] .os-mark::before { border-radius: 50%; }
.platform-kicker { color: var(--muted-2); font: 11px/1.3 ui-monospace, "Cascadia Code", Consolas, monospace; letter-spacing: 0.05em; text-transform: uppercase; }
.release-card h3 { margin-top: 2px; font-size: 20px; }
.platform-requirements { min-height: 52px; margin: 17px 0 14px; color: var(--muted); font-size: 14px; }
.download-list { display: grid; gap: 10px; }
.download-row { display: flex; align-items: center; justify-content: space-between; gap: 14px; padding: 13px; background: var(--bg); border: 1px solid var(--border); border-radius: 11px; }
.download-row h4 { margin-bottom: 3px; font-size: 15px; }
.download-row p { max-width: 350px; color: var(--muted); font-size: 12.5px; line-height: 1.45; }
.download-action { flex: 0 0 auto; }
.artifact-note { margin-top: 14px; color: var(--muted-2); font-size: 12px; }
.source-callout {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  margin-top: 22px;
  padding: 20px 23px;
  background: rgba(34, 211, 238, 0.07);
  border: 1px solid var(--cyan-dark);
  border-radius: var(--radius);
}
.source-callout h3 { margin-bottom: 3px; font-size: 17px; }
.source-callout p { max-width: 700px; color: var(--muted); font-size: 14px; }

/* First-run steps */
.split-heading { display: grid; grid-template-columns: 1fr 1fr; align-items: end; gap: 30px; }
.split-heading h2 { text-align: left; }
.split-heading > p { max-width: 500px; color: var(--muted); font-size: 15px; }
.steps { display: grid; grid-template-columns: repeat(4, 1fr); gap: 14px; counter-reset: step; }
.step { position: relative; padding: 23px 18px 20px; background: var(--panel); border: 1px solid var(--border); border-radius: var(--radius); }
.step-number { display: grid; width: 35px; height: 35px; place-items: center; margin-bottom: 14px; color: #06251c; background: var(--green); border-radius: 50%; font-weight: 850; }
.step h3 { margin-bottom: 6px; font-size: 16px; }
.step p { color: var(--muted); font-size: 14px; }

/* Model cards */
.model-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.model-card { padding: 24px; background: var(--panel-2); border: 1px solid var(--border); border-radius: var(--radius); }
.model-card-top { display: flex; align-items: center; justify-content: space-between; gap: 12px; }
.language-chip { padding: 3px 9px; color: var(--green); background: var(--green-dark); border-radius: 999px; font: 800 12px/1.4 ui-monospace, "Cascadia Code", Consolas, monospace; }
.model-size { color: var(--muted-2); font-size: 12px; }
.model-card h3 { margin: 14px 0 5px; font-size: 19px; }
.model-id { overflow-wrap: anywhere; color: var(--cyan); font-size: 12px; }
.model-card > p:not(.model-id) { margin-top: 12px; color: var(--muted); font-size: 14px; }
.link-stack { display: grid; gap: 7px; margin-top: 18px; font-size: 14px; }
.inline-note { margin-top: 18px; padding: 16px 19px; color: var(--muted); background: var(--bg); border: 1px solid var(--border); border-left: 3px solid var(--yellow); border-radius: 10px; font-size: 14px; }
.inline-note strong { color: var(--text); }

/* Requirements */
.requirements-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; }
.requirement-card { min-height: 235px; }
.check-list { display: grid; gap: 8px; padding: 0; list-style: none; }
.check-list li { position: relative; padding-left: 24px; color: var(--muted); font-size: 14px; }
.check-list li::before { position: absolute; left: 0; color: var(--green); content: "✓"; font-weight: 800; }

/* Checksums */
.checksum-panel { overflow: hidden; background: var(--panel-2); border: 1px solid var(--border); border-radius: var(--radius); }
.empty-state { padding: 22px; color: var(--muted); font-size: 14px; text-align: center; }
.checksum-row { display: grid; grid-template-columns: 1.1fr 1fr auto; align-items: center; gap: 15px; padding: 14px 18px; border-bottom: 1px solid var(--border); }
.checksum-row:last-child { border-bottom: 0; }
.checksum-file { overflow-wrap: anywhere; color: var(--text); font-size: 13px; }
.checksum-hash { overflow-wrap: anywhere; color: var(--cyan); font-size: 12px; }
.checksum-kind { color: var(--muted-2); font-size: 11px; text-align: right; }
.checksum-help { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; margin-top: 16px; }
.checksum-help > div { padding: 15px 17px; background: var(--panel); border: 1px solid var(--border); border-radius: 10px; }
.checksum-help h3 { margin-bottom: 7px; font-size: 14px; }
.checksum-help code { display: block; overflow-wrap: anywhere; color: var(--cyan); font-size: 12px; }
.small-note { margin-top: 15px; color: var(--muted-2); font-size: 13px; text-align: center; }

/* FAQ and source */
.faq-list { max-width: 820px; margin: 0 auto; }
details { margin-bottom: 10px; padding: 16px 20px; background: var(--panel-2); border: 1px solid var(--border); border-radius: 12px; }
summary { cursor: pointer; color: var(--text); font-size: 15px; font-weight: 700; }
details p { margin-top: 10px; color: var(--muted); font-size: 14px; }
.source-panel { display: flex; align-items: center; justify-content: space-between; gap: 30px; }
.source-panel h2 { text-align: left; }
.source-panel > div:first-child { max-width: 650px; }
.source-panel > div:first-child p:not(.eyebrow) { margin-top: 13px; color: var(--muted); font-size: 15px; }
.source-links { display: grid; flex: 0 0 270px; gap: 9px; }
.source-links .btn { width: 100%; }

/* Footer */
footer { padding: 38px 0 24px; color: var(--muted); border-top: 1px solid var(--border); font-size: 13px; }
.footer-inner, .footer-bottom { display: flex; align-items: flex-start; justify-content: space-between; gap: 25px; }
.footer-inner strong { color: var(--text); font-size: 14px; }
.footer-inner p { margin-top: 3px; }
.footer-links { display: flex; flex-wrap: wrap; justify-content: flex-end; gap: 14px; }
.footer-links a, .footer-bottom a { color: var(--muted); }
.footer-links a:hover, .footer-bottom a:hover { color: var(--text); }
.footer-bottom { margin-top: 28px; padding-top: 17px; border-top: 1px solid var(--border); color: var(--muted-2); font-size: 12px; }

/* Legal pages */
.legal { max-width: 800px; margin: 0 auto; padding: 68px 24px 78px; }
.legal h1 { margin-bottom: 8px; color: var(--text); font-size: clamp(30px, 5vw, 44px); line-height: 1.15; letter-spacing: -0.03em; }
.legal .updated { margin-bottom: 34px; color: var(--muted-2); font-size: 13px; }
.legal h2 { margin: 30px 0 8px; color: var(--text); font-size: 20px; line-height: 1.3; text-align: left; }
.legal p, .legal li { color: var(--muted); font-size: 15px; }
.legal p { margin-bottom: 12px; }
.legal ul { margin: 8px 0 15px 22px; }
.legal li { margin-bottom: 7px; }
.legal strong { color: var(--text); }
.legal .callout { margin: 20px 0; padding: 16px 18px; background: var(--panel); border: 1px solid var(--border); border-left: 3px solid var(--green); border-radius: 10px; }
.model-license-card { margin: 16px 0; padding: 18px 20px; background: var(--panel); border: 1px solid var(--border); border-radius: 12px; }
.model-license-card h3 { display: flex; align-items: center; flex-wrap: wrap; gap: 9px; margin-bottom: 10px; color: var(--text); font: 700 15px/1.45 ui-monospace, "Cascadia Code", Consolas, monospace; overflow-wrap: anywhere; }
.model-license-card p { margin-bottom: 8px; }
.model-license-card p:last-child { margin-bottom: 0; }

@media (max-width: 900px) {
  .nav-links { gap: 12px; }
  .feature-grid, .requirements-grid { grid-template-columns: repeat(2, 1fr); }
  .steps { grid-template-columns: repeat(2, 1fr); }
  .source-panel { align-items: flex-start; flex-direction: column; }
  .source-links { width: 100%; max-width: 360px; flex-basis: auto; }
}

@media (max-width: 700px) {
  .wrap { width: min(100% - 32px, 1080px); }
  .site-header .wrap { min-height: 58px; flex-wrap: wrap; gap: 8px 14px; padding-top: 8px; padding-bottom: 8px; }
  .nav-links { order: 3; width: 100%; margin: 0; overflow-x: auto; padding-bottom: 1px; font-size: 13px; }
  .nav-source { margin-left: auto; }
  .hero { padding-top: 58px; }
  .hero h1 { font-size: clamp(34px, 11vw, 50px); }
  .lead { font-size: 17px; }
  .quick-facts, .release-grid, .model-grid, .requirements-grid, .steps, .feature-grid { grid-template-columns: 1fr; }
  .quick-facts { max-width: 460px; }
  .key-separator { display: none; }
  section { padding: 56px 0; }
  .section-heading, .source-callout, .split-heading { display: block; }
  .section-heading .text-link { display: inline-block; margin-top: 12px; }
  .section-heading h2, .split-heading h2, .source-panel h2 { text-align: left; }
  .split-heading > p { margin-top: 14px; }
  .source-callout .btn { margin-top: 15px; }
  .download-row { align-items: flex-start; flex-direction: column; }
  .download-action { width: 100%; }
  .checksum-row { grid-template-columns: 1fr; gap: 5px; }
  .checksum-kind { text-align: left; }
  .checksum-help { grid-template-columns: 1fr; }
  .footer-inner, .footer-bottom { align-items: flex-start; flex-direction: column; }
  .footer-links { justify-content: flex-start; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { transition-duration: 0.01ms !important; animation-duration: 0.01ms !important; }
}

@media print {
  .site-header, footer, .actions, .skip-link { display: none; }
  body { color: #111; background: #fff; }
  a { color: #0645ad; }
  section.alt, .card, .release-card, .model-card, .requirement-card { color: #111; background: #fff; border-color: #bbb; }
}