:root {
  --bg: #07090d;
  --bg-deep: #030508;
  --surface: rgba(255, 255, 255, 0.045);
  --surface-strong: rgba(255, 255, 255, 0.085);
  --text: #f5f7fb;
  --muted: rgba(245, 247, 251, 0.7);
  --faint: rgba(245, 247, 251, 0.52);
  --line: rgba(255, 255, 255, 0.11);
  --blue: #8bc7ff;
  --blue-strong: #2b8dff;
  --radius: 24px;
  --content: 1120px;
  --shadow: 0 30px 90px rgba(0, 0, 0, 0.42);
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  min-width: 320px;
  margin: 0;
  color: var(--text);
  background:
    radial-gradient(circle at 50% -16%, rgba(78, 135, 211, 0.28), transparent 35rem),
    radial-gradient(circle at 0% 28%, rgba(92, 61, 194, 0.13), transparent 28rem),
    linear-gradient(180deg, #0a0d12 0%, var(--bg) 46%, var(--bg-deep) 100%);
  font-family: "Space Grotesk", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  -webkit-font-smoothing: antialiased;
}

body::before {
  position: fixed;
  z-index: -1;
  inset: 0;
  pointer-events: none;
  content: "";
  background: linear-gradient(118deg, rgba(255, 255, 255, 0.04), transparent 17%);
}

a { color: inherit; text-decoration: none; }

.shell { width: min(100% - 40px, var(--content)); margin: 0 auto; }

.site-header { position: relative; z-index: 3; }

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  min-height: 76px;
  border-bottom: 1px solid var(--line);
}

.wordmark { display: inline-flex; align-items: center; gap: 10px; font-size: 1.04rem; font-weight: 700; letter-spacing: -0.02em; }

.wordmark-mark {
  width: 21px;
  height: 21px;
  border: 1px solid rgba(255,255,255,.72);
  border-radius: 50%;
  background: radial-gradient(circle at 34% 34%, #e9f5ff 0 6%, #6caeea 7% 19%, #1a4268 20% 49%, #07111e 50%);
  box-shadow: 0 0 22px rgba(104, 184, 255, 0.32);
}

.nav-links { display: flex; align-items: center; flex-wrap: wrap; justify-content: flex-end; gap: 7px 20px; color: var(--muted); font-size: .93rem; }
.nav-links a { transition: color .2s ease; }
.nav-links a:hover, .nav-links a:focus-visible, .nav-links a[aria-current="page"] { color: var(--text); }
.nav-links .nav-product { color: var(--text); font-weight: 500; }

.eyebrow { display: inline-flex; align-items: center; gap: 8px; margin: 0; color: var(--blue); font-size: .79rem; font-weight: 700; letter-spacing: .12em; text-transform: uppercase; }
.eyebrow::before { width: 6px; height: 6px; border-radius: 50%; content: ""; background: currentColor; box-shadow: 0 0 13px currentColor; }

.hero { position: relative; padding: 112px 0 72px; text-align: center; overflow: hidden; }
.hero--home { padding-bottom: 38px; }

.hero h1 { max-width: 920px; margin: 20px auto 20px; font-size: clamp(3.7rem, 9vw, 7.3rem); font-weight: 700; letter-spacing: -.07em; line-height: .91; }
.hero h1.product-name { max-width: 860px; }

.hero-lede { max-width: 750px; margin: 0 auto; color: var(--muted); font-size: clamp(1.12rem, 2.1vw, 1.5rem); line-height: 1.48; }
.hero-lede strong { color: var(--text); font-weight: 500; }

.hero-actions { display: flex; flex-wrap: wrap; justify-content: center; gap: 12px; margin-top: 31px; }

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 12px 19px;
  border: 1px solid transparent;
  border-radius: 980px;
  font-size: .98rem;
  font-weight: 600;
  transition: transform .2s ease, background .2s ease, border-color .2s ease;
}
.button:hover, .button:focus-visible { transform: translateY(-1px); }
.button--light { color: #080a0f; background: #fff; box-shadow: 0 10px 35px rgba(255,255,255,.12); }
.button--light:hover, .button--light:focus-visible { background: #e5f2ff; }
.button--quiet { border-color: var(--line); background: rgba(255,255,255,.035); }
.button--quiet:hover, .button--quiet:focus-visible { border-color: rgba(255,255,255,.28); background: var(--surface-strong); }
.button small { display: block; margin-left: 8px; opacity: .64; font-size: .72rem; font-weight: 500; }

.product-visual {
  position: relative;
  isolation: isolate;
  width: min(100%, 1050px);
  min-height: 400px;
  margin: 50px auto 0;
  overflow: hidden;
  border: 1px solid rgba(255,255,255,.13);
  border-radius: 34px;
  background:
    linear-gradient(180deg, rgba(4, 9, 18, .08), rgba(4, 10, 20, .68)),
    url("https://i.ytimg.com/vi/yIUrudPfMCk/hqdefault.jpg") center / cover,
    linear-gradient(135deg, #31669d, #132944 50%, #071019);
  box-shadow: var(--shadow);
}
.product-visual::before {
  position: absolute;
  z-index: -1;
  inset: 0;
  content: "";
  background: linear-gradient(180deg, transparent 43%, rgba(4, 8, 14, .82));
}
.product-visual-note { position: absolute; right: 24px; bottom: 20px; left: 24px; display: flex; align-items: flex-end; justify-content: space-between; gap: 20px; text-align: left; }
.product-visual-note p { max-width: 420px; margin: 0; color: rgba(255,255,255,.82); font-size: .92rem; line-height: 1.5; }
.product-visual-note span { color: rgba(255,255,255,.68); font-size: .8rem; white-space: nowrap; }

.announcement {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: center;
  gap: 30px;
  margin: 24px 0 56px;
  padding: 24px 28px;
  border: 1px solid var(--line);
  border-radius: 20px;
  background: linear-gradient(120deg, rgba(112, 184, 255, .11), rgba(255,255,255,.035));
}
.announcement h2 { margin: 0 0 6px; font-size: clamp(1.35rem, 2vw, 1.75rem); letter-spacing: -.04em; }
.announcement p { margin: 0; color: var(--muted); line-height: 1.55; }
.text-link { color: var(--blue); font-weight: 600; white-space: nowrap; }
.text-link::after { margin-left: 6px; content: "→"; }

.section { padding: 76px 0; }
.section--tight { padding: 48px 0 76px; }
.section--divider { border-top: 1px solid var(--line); }
.section-heading { max-width: 720px; margin: 0 auto 42px; text-align: center; }
.section-heading h2 { margin: 12px 0 12px; font-size: clamp(2.15rem, 4vw, 3.45rem); letter-spacing: -.06em; line-height: 1.02; }
.section-heading p { margin: 0; color: var(--muted); font-size: 1.1rem; line-height: 1.65; }

.feature-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 15px; }
.feature-card { min-height: 210px; padding: 25px; border: 1px solid rgba(255,255,255,.09); border-radius: 22px; background: var(--surface); }
.feature-kicker { display: block; margin-bottom: 38px; color: var(--blue); font-size: .78rem; font-weight: 700; letter-spacing: .1em; text-transform: uppercase; }
.feature-card h3 { margin: 0 0 10px; font-size: 1.17rem; letter-spacing: -.025em; }
.feature-card p { margin: 0; color: var(--muted); font-size: .96rem; line-height: 1.62; }

.screen-grid { display: grid; grid-template-columns: 1.28fr .86fr .86fr; gap: 16px; }
.screen-card { position: relative; min-height: 305px; overflow: hidden; border: 1px solid rgba(255,255,255,.11); border-radius: 24px; background: var(--surface); }
.screen-card--live { background: linear-gradient(160deg, rgba(21,45,70,.12), rgba(8,13,20,.9)), url("https://i.ytimg.com/vi/yIUrudPfMCk/hqdefault.jpg") center / cover; }
.screen-card--map { background: radial-gradient(circle at 68% 30%, rgba(150,210,255,.48) 0 1%, transparent 2%), radial-gradient(ellipse at 70% 35%, #286c9a 0 13%, #133855 14% 27%, #0c1e32 28% 39%, transparent 40%), linear-gradient(143deg, #102c42 0%, #1f4963 47%, #09121e 48%, #04060a); }
.screen-card--audio { background: radial-gradient(circle at 50% 45%, rgba(135,200,255,.42), transparent 2%), repeating-radial-gradient(ellipse at 50% 45%, rgba(131,195,255,.38) 0 1px, transparent 2px 23px), linear-gradient(155deg, #0f1c30, #04070d); }
.screen-card::after { position: absolute; inset: 0; content: ""; background: linear-gradient(180deg, transparent 45%, rgba(3,5,8,.85)); }
.screen-label { position: absolute; z-index: 1; right: 20px; bottom: 18px; left: 20px; }
.screen-label strong { display: block; font-size: 1.08rem; }
.screen-label span { display: block; margin-top: 5px; color: rgba(255,255,255,.74); font-size: .86rem; line-height: 1.45; }

.system-panel { display: grid; grid-template-columns: .9fr 1.1fr; overflow: hidden; border: 1px solid var(--line); border-radius: 28px; background: var(--surface); }
.system-art { position: relative; min-height: 390px; overflow: hidden; background: radial-gradient(circle at 54% 50%, #4f97ca 0 4%, #1d6090 5% 17%, #0e2e4d 18% 30%, transparent 31%), radial-gradient(circle at 54% 50%, transparent 0 25%, rgba(159,215,255,.15) 26% 26.5%, transparent 27% 37%, rgba(159,215,255,.1) 38% 38.5%, transparent 39%), linear-gradient(140deg, #0c1f34, #07101c 58%, #030508); }
.system-art::before { position: absolute; top: 15%; right: 12%; width: 92px; height: 150px; border: 6px solid rgba(246,250,255,.9); border-radius: 16px; content: ""; box-shadow: inset 0 0 0 4px rgba(73,154,220,.4), 0 20px 40px rgba(0,0,0,.35); transform: rotate(9deg); }
.system-art::after { position: absolute; bottom: 9%; left: 12%; width: 65%; height: 34%; border: 8px solid rgba(246,250,255,.87); border-radius: 8px 8px 0 0; content: ""; box-shadow: inset 0 0 0 4px rgba(73,154,220,.22), 0 24px 46px rgba(0,0,0,.35); }
.system-copy { display: flex; flex-direction: column; justify-content: center; padding: 48px; }
.system-copy h2 { margin: 12px 0 16px; font-size: clamp(2rem, 3.4vw, 3rem); letter-spacing: -.06em; line-height: 1.04; }
.system-copy p { margin: 0 0 18px; color: var(--muted); font-size: 1.04rem; line-height: 1.7; }
.checklist { display: grid; gap: 12px; margin: 10px 0 0; padding: 0; list-style: none; }
.checklist li { position: relative; padding-left: 28px; color: var(--muted); line-height: 1.55; }
.checklist li::before { position: absolute; top: .32em; left: 0; width: 15px; height: 8px; border-bottom: 2px solid var(--blue); border-left: 2px solid var(--blue); content: ""; transform: rotate(-45deg); }

.cta-band { margin: 0 0 58px; padding: 48px 28px; border: 1px solid rgba(164,214,255,.22); border-radius: 28px; background: radial-gradient(circle at 50% 0%, rgba(85,157,221,.28), transparent 60%), rgba(255,255,255,.04); text-align: center; }
.cta-band h2 { max-width: 720px; margin: 12px auto; font-size: clamp(2rem, 4vw, 3.4rem); letter-spacing: -.06em; line-height: 1.03; }
.cta-band p { max-width: 600px; margin: 0 auto; color: var(--muted); line-height: 1.65; }
.cta-band .hero-actions { margin-top: 27px; }

.prose-hero { padding: 88px 0 34px; text-align: center; }
.prose-hero h1 { margin: 17px 0 11px; font-size: clamp(3rem, 7vw, 5.3rem); letter-spacing: -.07em; line-height: .94; }
.prose-hero p { max-width: 590px; margin: 0 auto; color: var(--muted); font-size: 1.12rem; line-height: 1.58; }
.prose { width: min(100%, 820px); margin: 0 auto; padding: 34px 0 76px; }
.prose section { padding: 31px 0; border-top: 1px solid var(--line); }
.prose h2 { margin: 0 0 14px; font-size: clamp(1.48rem, 3vw, 2rem); letter-spacing: -.045em; }
.prose h3 { margin: 26px 0 8px; font-size: 1.1rem; letter-spacing: -.02em; }
.prose p, .prose li { color: var(--muted); line-height: 1.72; }
.prose p { margin: 0 0 14px; }
.prose ul { margin: 0; padding-left: 1.3rem; }
.prose li + li { margin-top: 7px; }
.prose a { color: var(--blue); text-decoration: underline; text-underline-offset: 3px; }
.faq-list { display: grid; gap: 12px; }
.faq { padding: 0 20px; border: 1px solid rgba(255,255,255,.09); border-radius: 16px; background: var(--surface); }
.faq summary { padding: 19px 26px 19px 0; cursor: pointer; font-weight: 600; list-style: none; }
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { float: right; content: "+"; color: var(--blue); font-size: 1.25rem; font-weight: 400; }
.faq[open] summary::after { content: "−"; }
.faq p { padding-bottom: 18px; }
.contact-card { padding: 28px; border: 1px solid rgba(141,204,255,.24); border-radius: 20px; background: linear-gradient(135deg, rgba(82,145,211,.15), rgba(255,255,255,.035)); }
.contact-card p:last-child { margin-bottom: 0; }
.contact-email { color: var(--text) !important; font-size: clamp(1.2rem, 3vw, 1.65rem); font-weight: 600; letter-spacing: -.035em; }
.notice { padding: 16px 18px; border-left: 2px solid var(--blue); border-radius: 0 12px 12px 0; background: rgba(120,188,247,.08); }

.support-prose { width: min(100%, 1020px); }
.support-prose strong { color: var(--text); font-weight: 600; }
.guide-toc { display: flex; flex-wrap: wrap; gap: 9px; margin-top: 24px; }
.guide-toc a { padding: 9px 13px; border: 1px solid var(--line); border-radius: 999px; color: var(--muted); background: rgba(255,255,255,.035); font-size: .85rem; font-weight: 600; text-decoration: none; }
.guide-toc a:hover, .guide-toc a:focus-visible { border-color: rgba(139,199,255,.52); color: var(--text); background: rgba(139,199,255,.09); }
.support-prose .guide-step { display: grid; grid-template-columns: minmax(260px,.72fr) minmax(0,1.28fr); align-items: center; gap: 34px; padding: 52px 0; scroll-margin-top: 24px; }
.support-prose .guide-step--stack { display: block; }
.guide-copy { min-width: 0; }
.guide-copy ol { margin: 18px 0 0; padding-left: 1.25rem; }
.guide-copy li + li { margin-top: 9px; }
.step-label { margin: 0 0 7px !important; color: var(--blue) !important; font-size: .78rem; font-weight: 700; letter-spacing: .12em; text-transform: uppercase; }
.privacy-note { margin-top: 18px !important; padding: 13px 15px; border-left: 2px solid var(--blue); border-radius: 0 12px 12px 0; background: rgba(120,188,247,.08); font-size: .9rem; }
.support-figure { min-width: 0; margin: 0; overflow: hidden; border: 1px solid rgba(255,255,255,.12); border-radius: 20px; background: #05070a; box-shadow: 0 20px 52px rgba(0,0,0,.28); }
.support-figure img { display: block; width: 100%; height: auto; }
.support-figure figcaption { padding: 12px 15px 14px; border-top: 1px solid rgba(255,255,255,.08); color: var(--faint); font-size: .82rem; line-height: 1.5; }
.support-gallery { display: grid; gap: 16px; margin-top: 28px; }
.support-gallery--phones { grid-template-columns: repeat(4,minmax(0,1fr)); align-items: start; }
.support-gallery--phones .support-figure img { aspect-ratio: 1170 / 2532; object-fit: cover; object-position: top; }
.guide-step--stack > .support-figure--wide { margin-top: 18px; }

.home-demo { margin: 30px auto 0; padding: 18px; border: 1px solid rgba(255,255,255,.08); border-radius: 30px; background: linear-gradient(180deg, rgba(255,255,255,.08), rgba(255,255,255,.02)), rgba(255,255,255,.03); box-shadow: var(--shadow); }
.video-frame { position: relative; width: 100%; overflow: hidden; border-radius: var(--radius); aspect-ratio: 16 / 9; background: #000; }
.video-frame iframe { width: 100%; height: 100%; border: 0; }
.music-credit { margin: 8px 4px 0; color: rgba(245,247,251,.42); font-size: .8rem; line-height: 1.65; text-align: right; }
.music-credit a { color: rgba(245,247,251,.72); text-decoration: underline; text-underline-offset: 3px; }
.original-copy { max-width: 840px; margin: 0 auto; color: var(--muted); font-size: 1rem; line-height: 1.8; text-align: center; }
.applications { max-width: 840px; margin: 26px auto 0; padding: 22px 24px; border: 1px solid rgba(255,255,255,.06); border-radius: 20px; background: rgba(255,255,255,.025); text-align: center; }
.applications h2 { margin: 0 0 14px; color: rgba(245,247,251,.72); font-size: .9rem; font-weight: 500; letter-spacing: .06em; text-transform: uppercase; }
.applications ul { display: grid; grid-template-columns: repeat(2,minmax(0,1fr)); gap: 10px 18px; margin: 0; padding: 0; list-style: none; }
.applications li { color: var(--muted); font-size: .95rem; line-height: 1.7; }

.site-footer { padding: 28px 0 44px; border-top: 1px solid var(--line); color: var(--faint); font-size: .89rem; line-height: 1.65; }
.footer-row { display: flex; align-items: flex-start; justify-content: space-between; gap: 24px; }
.footer-row p { max-width: 550px; margin: 0; }
.footer-links { display: flex; flex-wrap: wrap; justify-content: flex-end; gap: 14px; color: var(--muted); }
.footer-links a:hover, .footer-links a:focus-visible { color: var(--text); }

@media (max-width: 820px) {
  .shell { width: min(100% - 30px, var(--content)); }
  .nav { min-height: 80px; align-items: flex-start; flex-direction: column; gap: 7px; padding: 17px 0; }
  .nav-links { justify-content: flex-start; gap: 6px 16px; }
  .hero { padding-top: 78px; }
  .product-visual { min-height: 310px; margin-top: 38px; }
  .feature-grid, .screen-grid { grid-template-columns: 1fr; }
  .screen-card { min-height: 240px; }
  .system-panel { grid-template-columns: 1fr; }
  .system-art { min-height: 280px; }
  .system-copy { padding: 34px 28px; }
  .announcement { grid-template-columns: 1fr; gap: 17px; }
  .footer-row { flex-direction: column; }
  .footer-links { justify-content: flex-start; }
  .support-prose .guide-step { grid-template-columns: 1fr; gap: 25px; }
  .support-gallery--phones { grid-template-columns: repeat(2,minmax(0,1fr)); }
}

@media (max-width: 520px) {
  .hero h1 { font-size: clamp(3.05rem, 17vw, 4.7rem); }
  .hero-actions { flex-direction: column; align-items: stretch; }
  .button { width: 100%; }
  .product-visual { min-height: 250px; border-radius: 24px; }
  .product-visual-note { right: 17px; bottom: 15px; left: 17px; align-items: flex-start; flex-direction: column; gap: 6px; }
  .section { padding: 58px 0; }
  .applications ul { grid-template-columns: 1fr; }
  .home-demo { padding: 10px; border-radius: 22px; }
  .cta-band { padding: 38px 20px; }
  .guide-toc { align-items: stretch; flex-direction: column; }
  .guide-toc a { text-align: center; }
  .support-gallery--phones { grid-template-columns: 1fr; }
  .support-gallery--phones .support-figure img { max-height: 640px; object-fit: contain; }
}