:root {
  color-scheme: dark;
  --ink: #f5f7fb;
  --muted: #aab5c7;
  --subtle: #77859b;
  --surface: #182338;
  --surface-raised: #1d2b43;
  --line: rgba(196, 211, 239, .14);
  --accent: #8ca5ff;
  --accent-bright: #b9c8ff;
  --green: #73dfb0;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  min-width: 320px;
  color: var(--ink);
  background: radial-gradient(ellipse at 82% 5%, rgba(87, 111, 190, .19), transparent 34rem), #101827;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  line-height: 1.55;
}
a { color: inherit; }
.site-header, .site-footer {
  width: min(1120px, calc(100% - 48px));
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.site-header { min-height: 82px; border-bottom: 1px solid var(--line); }
.brand { display: inline-flex; align-items: center; gap: 11px; text-decoration: none; font-weight: 700; letter-spacing: -.02em; }
.brand-mark {
  width: 34px; height: 34px; display: grid; place-items: center; border-radius: 11px;
  color: #101827; background: linear-gradient(145deg, #d8e1ff, #809aff); font-size: 13px; font-weight: 900;
}
.header-link, .text-link { color: var(--accent-bright); text-decoration: none; font-size: 14px; font-weight: 600; }
.header-link:hover, .text-link:hover, .checksum-link a:hover { color: white; }
main { width: min(1120px, calc(100% - 48px)); margin: 0 auto; }
.hero { min-height: 440px; display: grid; grid-template-columns: 1.2fr .8fr; align-items: center; gap: 52px; padding: 64px 0 76px; }
.eyebrow { margin: 0 0 17px; color: var(--accent-bright); font-size: 11px; font-weight: 800; letter-spacing: .15em; }
.status-dot { display: inline-block; width: 7px; height: 7px; margin: 0 8px 1px 0; border-radius: 50%; background: var(--green); box-shadow: 0 0 13px rgba(115, 223, 176, .7); }
h1 { margin: 0; font-size: clamp(54px, 7vw, 82px); line-height: .99; letter-spacing: -.065em; }
h1 span { color: var(--accent); }
.hero-description { max-width: 580px; margin: 24px 0 22px; color: var(--muted); font-size: 18px; }
.release-facts { display: flex; flex-wrap: wrap; gap: 9px; }
.release-facts span { padding: 7px 11px; border: 1px solid var(--line); border-radius: 999px; color: #cbd5e5; font-size: 12px; }
.hero-panel { position: relative; min-height: 310px; overflow: hidden; display: grid; place-items: center; border: 1px solid var(--line); border-radius: 30px; background: linear-gradient(145deg, rgba(120, 148, 237, .13), rgba(29, 43, 67, .5)); }
.panel-orbit { position: absolute; border: 1px solid rgba(163, 184, 255, .25); border-radius: 50%; transform: rotate(-24deg); }
.orbit-a { width: 280px; height: 150px; }
.orbit-b { width: 225px; height: 245px; transform: rotate(52deg); }
.panel-core { width: 116px; height: 116px; display: grid; place-items: center; border: 1px solid rgba(225, 232, 255, .6); border-radius: 34px; color: #111b2c; background: linear-gradient(145deg, #eff2ff, #8da7ff); box-shadow: 0 22px 70px rgba(93, 122, 217, .25); transform: rotate(-8deg); }
.panel-core span { font-size: 40px; font-weight: 900; letter-spacing: -.08em; }
.panel-spark { position: absolute; color: var(--accent-bright); }
.spark-a { top: 70px; left: 23%; font-size: 28px; }
.spark-b { right: 19%; bottom: 81px; font-size: 36px; }
.panel-caption { position: absolute; right: 22px; bottom: 14px; color: #dce4f6; font-size: 12px; text-align: right; }
.download-section { padding: 32px 0 82px; }
.section-heading { max-width: 660px; margin-bottom: 30px; }
.section-heading h2, .help-strip h2 { margin: 0; font-size: clamp(30px, 4vw, 42px); line-height: 1.1; letter-spacing: -.045em; }
.section-heading > p:last-child, .help-strip p:last-child { color: var(--muted); }
.download-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 16px; align-items: stretch; }
.download-card { min-width: 0; display: flex; flex-direction: column; padding: 25px; border: 1px solid var(--line); border-radius: 21px; background: linear-gradient(155deg, rgba(29, 43, 67, .96), rgba(21, 32, 50, .96)); }
.download-card-featured { border-color: rgba(140, 165, 255, .55); box-shadow: 0 18px 58px rgba(65, 91, 164, .14); }
.bundle-kicker { margin: 0 0 15px; color: var(--accent-bright); font-size: 10px; font-weight: 800; letter-spacing: .13em; }
.download-card h3 { margin: 0 0 11px; font-size: 23px; letter-spacing: -.035em; }
.download-card > p:not(.bundle-kicker):not(.checksum-link) { min-height: 76px; margin: 0; color: var(--muted); font-size: 14px; }
.download-card ul { min-height: 142px; margin: 18px 0 24px; padding-left: 19px; color: #d5deec; font-size: 13px; }
.download-card li { margin: 7px 0; }
.button { min-height: 46px; display: inline-flex; justify-content: center; align-items: center; gap: 10px; padding: 11px 16px; border: 1px solid transparent; border-radius: 12px; text-align: center; text-decoration: none; font-size: 13px; font-weight: 750; transition: transform .15s ease, background .15s ease; }
.button:hover { transform: translateY(-2px); }
.button-primary { color: #111b2c; background: linear-gradient(115deg, #d3ddff, #91a9ff); }
.button-primary:hover { background: #e4eaff; }
.button-secondary { color: var(--ink); border-color: var(--line); background: rgba(255, 255, 255, .04); }
.checksum-link { margin: 12px 0 0; text-align: center; font-size: 12px; }
.checksum-link a { color: var(--subtle); text-decoration: underline; text-underline-offset: 3px; }
.help-strip { display: flex; align-items: center; justify-content: space-between; gap: 30px; margin: 0 0 72px; padding: 30px 34px; border: 1px solid var(--line); border-radius: 20px; background: rgba(255, 255, 255, .035); }
.help-strip .eyebrow { margin-bottom: 9px; }
.help-strip h2 { font-size: 25px; }
.help-strip p:last-child { margin-bottom: 0; }
.help-strip .button { flex-shrink: 0; }
.site-footer { min-height: 96px; border-top: 1px solid var(--line); color: var(--subtle); font-size: 12px; }
.site-footer p { margin: 0; }
.site-footer .brand { color: var(--ink); font-size: 14px; }
.site-footer .brand-mark { width: 28px; height: 28px; border-radius: 9px; font-size: 11px; }

@media (max-width: 820px) {
  .hero { grid-template-columns: 1fr; gap: 35px; padding-top: 52px; }
  .hero-panel { min-height: 250px; }
  .download-grid { grid-template-columns: 1fr; }
  .download-card > p:not(.bundle-kicker):not(.checksum-link), .download-card ul { min-height: 0; }
  .help-strip { align-items: flex-start; flex-direction: column; }
}
@media (max-width: 520px) {
  .site-header, .site-footer, main { width: min(100% - 32px, 1120px); }
  .site-header { min-height: 70px; }
  .brand { gap: 8px; font-size: 13px; }
  .header-link { font-size: 12px; }
  .hero { min-height: 0; padding: 48px 0 58px; }
  .hero-description { font-size: 16px; }
  .download-section { padding-bottom: 58px; }
  .download-card { padding: 22px; }
  .help-strip { margin-bottom: 52px; padding: 24px; }
  .site-footer { flex-wrap: wrap; gap: 8px 18px; padding: 22px 0; }
  .site-footer p { order: 3; width: 100%; }
}