:root {
  color-scheme: dark;
  --bg: #07111f;
  --bg-deep: #040a12;
  --surface: #0d1b2c;
  --surface-raised: #12243a;
  --text: #f4f8fc;
  --muted: #aebed0;
  --cyan: #67d8ff;
  --blue: #2d8cff;
  --line: #233a53;
  --shadow: 0 24px 70px rgba(0, 0, 0, .35);
}

* { box-sizing: border-box; }

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

body {
  margin: 0;
  min-width: 0;
  color: var(--text);
  background:
    radial-gradient(circle at 78% 18%, rgba(45, 140, 255, .14), transparent 32rem),
    linear-gradient(180deg, var(--bg) 0%, var(--bg-deep) 100%);
  font-family: "Segoe UI", system-ui, -apple-system, BlinkMacSystemFont, sans-serif;
  font-size: 1rem;
  line-height: 1.65;
}

a { color: inherit; }
img { display: block; max-width: 100%; height: auto; }
.shell { width: min(100% - 2rem, 1080px); margin-inline: auto; }

.skip-link {
  position: fixed;
  z-index: 100;
  top: .75rem;
  left: .75rem;
  padding: .7rem 1rem;
  border-radius: .45rem;
  color: #00111d;
  background: var(--cyan);
  transform: translateY(-160%);
}
.skip-link:focus { transform: translateY(0); }

.site-header {
  border-bottom: 1px solid rgba(255, 255, 255, .08);
  background: rgba(4, 10, 18, .82);
  backdrop-filter: blur(12px);
}
.header-inner, .footer-inner { display: flex; align-items: center; justify-content: space-between; gap: 1.5rem; }
.header-inner { min-height: 4.75rem; }
.brand { display: block; flex: 0 1 auto; width: clamp(8.25rem, 15vw, 11rem); text-decoration: none; }
.brand img { width: 100%; height: auto; }
nav { display: flex; flex-wrap: wrap; gap: 1.25rem; }
nav a { color: var(--muted); font-weight: 600; text-decoration: none; }
nav a:hover { color: var(--text); }
nav a[aria-current="page"] { color: var(--text); }
a:focus-visible { outline: 3px solid var(--cyan); outline-offset: 4px; border-radius: .2rem; }

.home-hero { min-height: calc(100vh - 10rem); display: grid; align-items: center; padding: clamp(4rem, 10vw, 8rem) 0; }
.hero-grid { display: grid; grid-template-columns: minmax(0, 1.18fr) minmax(20rem, .82fr); gap: clamp(2.5rem, 7vw, 6.5rem); align-items: center; }
.eyebrow { margin: 0 0 .8rem; color: var(--cyan); font-size: .78rem; font-weight: 800; letter-spacing: .16em; text-transform: uppercase; }
h1, h2 { margin: 0; line-height: 1.08; letter-spacing: -.04em; }
h1 { max-width: 14ch; font-size: clamp(2.8rem, 7vw, 5.7rem); }
h2 { font-size: clamp(2rem, 4vw, 3rem); }
.lede { max-width: 40rem; margin: 1.6rem 0 2rem; color: var(--muted); font-size: clamp(1.08rem, 2vw, 1.28rem); }
.button { display: inline-flex; align-items: center; gap: .7rem; padding: .84rem 1.15rem; border: 1px solid #7be0ff; border-radius: .5rem; color: #02111c; background: linear-gradient(135deg, var(--cyan), #9ae8ff); box-shadow: 0 10px 30px rgba(31, 168, 255, .2); font-weight: 800; text-decoration: none; }
.button:hover { background: #a8efff; transform: translateY(-1px); }
.product-card { padding: clamp(1.5rem, 4vw, 2.4rem); border: 1px solid var(--line); border-radius: 1.2rem; background: linear-gradient(155deg, rgba(18, 36, 58, .95), rgba(8, 18, 31, .98)); box-shadow: var(--shadow); }
.product-card img { width: 8rem; margin-bottom: 1.8rem; border-radius: 1.3rem; box-shadow: 0 14px 35px rgba(0, 0, 0, .4); }
.product-card p:last-child { margin-bottom: 0; color: var(--muted); }
.product-subtitle { margin: .5rem 0 1rem; color: #dceafb; font-weight: 650; }

.site-footer { padding: 2rem 0; border-top: 1px solid var(--line); color: var(--muted); background: var(--bg-deep); }
.site-footer p { margin: 0; }
.site-footer nav { justify-content: flex-end; font-size: .92rem; }

.product-hero, .page-hero { padding: clamp(4rem, 8vw, 7rem) 0; }
.product-hero-grid { display: grid; grid-template-columns: .92fr 1.08fr; gap: clamp(2.5rem, 6vw, 5rem); align-items: center; }
.product-lockup { display: flex; align-items: center; gap: 1rem; margin-bottom: 2rem; }
.product-lockup img { width: 4.5rem; border-radius: 1rem; box-shadow: 0 12px 28px rgba(0, 0, 0, .36); }
.product-lockup .eyebrow { margin-bottom: .15rem; }
.product-name { margin: 0; font-size: 1.5rem; font-weight: 800; letter-spacing: -.03em; }
.product-hero h1 { max-width: 13ch; font-size: clamp(2.55rem, 5.4vw, 4.8rem); }
.platform-note { display: inline-flex; margin: 0; padding: .4rem .7rem; border: 1px solid var(--line); border-radius: 999px; color: #cee1f4; background: rgba(17, 35, 56, .72); font-size: .88rem; font-weight: 700; }
.hero-art { margin: 0; overflow: hidden; border: 1px solid var(--line); border-radius: 1.1rem; box-shadow: var(--shadow); transform: rotate(1deg); }
.hero-art img { width: 100%; }
.section { padding: clamp(4rem, 8vw, 7rem) 0; }
.section-muted { border-block: 1px solid var(--line); background: rgba(12, 27, 45, .68); }
.section-heading { max-width: 42rem; margin-bottom: 2.5rem; }
.section-heading h2, .clarification h2, .requirements h2, .prose h2 { font-size: clamp(2rem, 4.5vw, 3.35rem); }
.section-heading > p:last-child { color: var(--muted); }
.step-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1rem; }
.step-card { padding: 1.7rem; border: 1px solid var(--line); border-radius: .85rem; background: rgba(12, 27, 45, .72); }
.step-card h3 { margin: 1.25rem 0 .55rem; font-size: 1.2rem; }
.step-card p { margin: 0; color: var(--muted); }
.step-number { color: var(--cyan); font-size: .8rem; font-weight: 800; letter-spacing: .15em; }
.split-heading { display: grid; grid-template-columns: .85fr 1.15fr; gap: clamp(2rem, 7vw, 7rem); align-items: start; }
.feature-list { display: grid; grid-template-columns: 1fr 1fr; gap: 0; margin: 0; padding: 0; list-style: none; border-top: 1px solid var(--line); }
.feature-list li { position: relative; padding: 1rem 1rem 1rem 1.8rem; border-bottom: 1px solid var(--line); color: #dbe8f5; }
.feature-list li::before { content: ""; position: absolute; top: 1.65rem; left: .25rem; width: .48rem; height: .48rem; border-radius: 50%; background: var(--cyan); box-shadow: 0 0 0 4px rgba(103, 216, 255, .1); }
.clarification { display: grid; grid-template-columns: .85fr 1.15fr; gap: clamp(2rem, 7vw, 7rem); padding: clamp(2rem, 5vw, 3.5rem); border: 1px solid #276392; border-radius: 1rem; background: linear-gradient(135deg, rgba(16, 49, 80, .78), rgba(9, 25, 42, .88)); }
.clarification p:last-child { margin: 0; color: #d7e7f5; font-size: 1.16rem; }
.requirements { text-align: center; }
.narrow { max-width: 800px; }
.requirements p { color: var(--muted); font-size: 1.1rem; }
.support-prompt a, .prose a { color: var(--cyan); font-weight: 700; overflow-wrap: anywhere; text-underline-offset: .18em; }
.compact-hero { border-bottom: 1px solid var(--line); background: linear-gradient(180deg, rgba(18, 49, 80, .45), rgba(7, 17, 31, 0)); }
.compact-hero h1 { max-width: none; font-size: clamp(2.8rem, 7vw, 5rem); }
.compact-hero .lede { max-width: 47rem; }
.version-badge { display: inline-flex; gap: .4rem; margin: .5rem 0 0; padding: .45rem .7rem; border: 1px solid var(--line); border-radius: .45rem; color: var(--muted); background: rgba(10, 24, 40, .8); }
.content-layout { display: grid; grid-template-columns: 14rem minmax(0, 1fr); gap: clamp(2.5rem, 7vw, 6rem); padding-top: clamp(3rem, 6vw, 5rem); padding-bottom: clamp(4rem, 8vw, 7rem); align-items: start; }
.toc { position: sticky; top: 2rem; padding: 1rem 0; }
.toc > p { margin: 0 0 .8rem; color: var(--text); font-size: .8rem; font-weight: 800; letter-spacing: .12em; text-transform: uppercase; }
.toc nav { display: grid; gap: .6rem; }
.toc a { font-size: .92rem; font-weight: 600; }
.prose { color: #cad8e6; }
.prose > section { scroll-margin-top: 1rem; margin-top: clamp(3.5rem, 7vw, 5.5rem); }
.prose .intro { margin-top: 0; color: #e6f0f8; font-size: 1.2rem; }
.prose h2 { margin-bottom: 1.5rem; color: var(--text); }
.prose h3 { margin: 2rem 0 .55rem; color: #eef6fc; font-size: 1.2rem; }
.prose p { max-width: 74ch; }
.prose li + li { margin-top: .35rem; }
.prose strong { color: #f7fbff; }
.callout, .contact-panel { padding: clamp(1.5rem, 4vw, 2.5rem); border: 1px solid #285a82; border-radius: .9rem; background: rgba(15, 43, 70, .7); }
.callout h2, .contact-panel h2 { margin-top: 0; }
.faq-list { border-top: 1px solid var(--line); }
details { border-bottom: 1px solid var(--line); }
summary { cursor: pointer; padding: 1.15rem 2rem 1.15rem 0; color: var(--text); font-weight: 750; }
summary::marker { color: var(--cyan); }
details > p { margin: 0 0 1.35rem; padding-right: 2rem; }
.policy { padding-top: clamp(3rem, 6vw, 5rem); padding-bottom: clamp(4rem, 8vw, 7rem); }
.policy > section { padding-top: 1rem; border-top: 1px solid var(--line); }
.policy-meta { display: flex; flex-wrap: wrap; gap: .75rem; color: var(--muted); }
address { font-style: normal; }
.not-found { min-height: calc(100vh - 10rem); display: flex; flex-direction: column; justify-content: center; padding-block: 5rem; }
.not-found .button { align-self: flex-start; }

@media (max-width: 760px) {
  .header-inner { min-height: 4.25rem; }
  .hero-grid { grid-template-columns: 1fr; }
  .product-card { display: grid; grid-template-columns: 5.5rem 1fr; gap: 1.25rem; }
  .product-card img { width: 5.5rem; margin: 0; border-radius: .9rem; }
  .footer-inner { align-items: flex-start; flex-direction: column; }
  .site-footer nav { justify-content: flex-start; }
  .product-hero-grid, .split-heading, .clarification { grid-template-columns: 1fr; }
  .hero-art { transform: none; }
  .step-grid { grid-template-columns: 1fr; }
  .feature-list { grid-template-columns: 1fr; }
  .content-layout { grid-template-columns: 1fr; }
  .toc { position: static; padding: 1.25rem; border: 1px solid var(--line); border-radius: .75rem; background: rgba(10, 24, 40, .72); }
  .toc nav { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (max-width: 480px) {
  .header-inner { gap: .65rem; }
  .brand { width: clamp(7.8rem, 41vw, 8.7rem); }
  nav { gap: .7rem; }
  .header-inner nav { flex: 0 0 auto; gap: .55rem; font-size: .82rem; }
  .product-card { display: block; }
  .product-card img { margin-bottom: 1.25rem; }
  .toc nav { grid-template-columns: 1fr; }
  .product-lockup img { width: 3.8rem; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { scroll-behavior: auto !important; transition: none !important; }
}