:root {
  color-scheme: dark;
  --bg: #080a0d;
  --bg-soft: #0e1116;
  --surface: rgba(255, 255, 255, 0.045);
  --surface-strong: #141820;
  --text: #f5f7f9;
  --muted: #9ba3af;
  --line: rgba(255, 255, 255, 0.11);
  --accent: #b7ff4a;
  --accent-text: #101706;
  --shadow: 0 30px 90px rgba(0, 0, 0, 0.35);
  --radius: 24px;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background: var(--bg);
  color: var(--text);
  scroll-behavior: smooth;
}

:root[data-theme="light"] {
  color-scheme: light;
  --bg: #f1f3ee;
  --bg-soft: #e7eae3;
  --surface: rgba(0, 0, 0, 0.035);
  --surface-strong: #fff;
  --text: #0b0d10;
  --muted: #626a75;
  --line: rgba(0, 0, 0, 0.12);
  --accent: #75b91e;
  --accent-text: #fff;
  --shadow: 0 30px 90px rgba(35, 42, 30, 0.12);
}

* { box-sizing: border-box; }
html { background: var(--bg); }
body { margin: 0; min-width: 320px; background: var(--bg); color: var(--text); }
body, button, a { -webkit-font-smoothing: antialiased; }
a { color: inherit; text-decoration: none; }
button { font: inherit; }
svg { fill: none; stroke: currentColor; stroke-width: 1.8; stroke-linecap: round; stroke-linejoin: round; }
.shell { width: min(1180px, calc(100% - 40px)); margin-inline: auto; }
.skip-link { position: fixed; top: 8px; left: 8px; z-index: 999; padding: 10px 14px; border-radius: 10px; background: var(--text); color: var(--bg); transform: translateY(-150%); }
.skip-link:focus { transform: none; }

.site-header { position: sticky; top: 0; z-index: 50; border-bottom: 1px solid transparent; background: color-mix(in srgb, var(--bg) 82%, transparent); backdrop-filter: blur(18px); -webkit-backdrop-filter: blur(18px); }
.header-inner { width: min(1180px, calc(100% - 40px)); min-height: 72px; margin: auto; display: flex; align-items: center; gap: 28px; }
.brand { display: inline-flex; align-items: center; gap: 10px; font-size: 1.05rem; font-weight: 800; letter-spacing: -.02em; }
.brand img { border-radius: 10px; box-shadow: 0 0 0 1px var(--line); }
.brand-by { color: var(--muted); font-size: .76rem; font-weight: 600; }
.header-nav { display: flex; align-items: center; gap: 28px; margin-left: auto; }
.header-nav a, .site-footer a { color: var(--muted); font-size: .9rem; transition: color .2s ease; }
.header-nav a:hover, .site-footer a:hover { color: var(--text); }
.header-actions { display: flex; gap: 8px; }
.icon-button, .language-button { width: 40px; height: 40px; display: grid; place-items: center; border: 1px solid var(--line); border-radius: 50%; background: var(--surface); color: var(--text); cursor: pointer; }
.icon-button svg { width: 19px; }
.language-button { font-size: .75rem; font-weight: 800; }

.hero { min-height: 690px; display: grid; grid-template-columns: 1.06fr .94fr; align-items: center; gap: 72px; padding-block: 92px 70px; }
.hero-copy { max-width: 680px; }
.eyebrow { margin: 0 0 18px; display: flex; align-items: center; gap: 10px; color: var(--muted); font-size: .76rem; font-weight: 800; letter-spacing: .12em; text-transform: uppercase; }
.status-dot { width: 7px; height: 7px; border-radius: 50%; background: var(--accent); box-shadow: 0 0 18px var(--accent); }
h1, h2, h3, p { margin-top: 0; }
h1 { margin-bottom: 24px; font-size: clamp(3.2rem, 6.4vw, 6rem); line-height: .94; letter-spacing: -.075em; font-weight: 850; }
.hero-lead { max-width: 590px; margin-bottom: 34px; color: var(--muted); font-size: clamp(1.06rem, 1.7vw, 1.28rem); line-height: 1.6; }
.hero-actions, .inline-actions { display: flex; flex-wrap: wrap; gap: 12px; }
.button { min-height: 52px; padding: 0 21px; display: inline-flex; align-items: center; justify-content: center; gap: 8px; border: 1px solid var(--line); border-radius: 14px; font-size: .93rem; font-weight: 750; transition: transform .2s ease, border-color .2s ease, background .2s ease; }
.button:hover { transform: translateY(-2px); border-color: color-mix(in srgb, var(--text) 35%, transparent); }
.button svg { width: 18px; }
.button.primary { background: var(--accent); border-color: var(--accent); color: var(--accent-text); }
.button.secondary { background: var(--surface); }
.button.light { background: #fff; border-color: #fff; color: #080a0d; }
.device-note { margin: 17px 0 0; color: var(--muted); font-size: .8rem; }

.hero-visual { position: relative; min-height: 440px; border: 1px solid var(--line); border-radius: 38px; background: radial-gradient(circle at 70% 22%, rgba(183,255,74,.16), transparent 28%), linear-gradient(145deg, var(--surface-strong), var(--bg-soft)); box-shadow: var(--shadow); overflow: hidden; }
.hero-visual::before { content: "N"; position: absolute; inset: 0; display: grid; place-items: center; color: color-mix(in srgb, var(--text) 4%, transparent); font-size: 25rem; font-weight: 900; transform: rotate(-10deg); }
.orb { position: absolute; border-radius: 50%; filter: blur(2px); }
.orb-a { width: 170px; height: 170px; right: -50px; top: -40px; background: rgba(183,255,74,.14); }
.orb-b { width: 240px; height: 240px; left: -110px; bottom: -130px; background: rgba(111,90,255,.16); }
.message-card { position: absolute; left: 8%; right: 8%; min-height: 84px; padding: 17px; display: grid; grid-template-columns: 46px 1fr auto; gap: 14px; align-items: center; border: 1px solid rgba(255,255,255,.14); border-radius: 20px; background: rgba(16,19,24,.75); color: #fff; box-shadow: 0 20px 50px rgba(0,0,0,.25); backdrop-filter: blur(14px); }
.message-one { top: 19%; transform: rotate(-2deg); }
.message-two { top: 48%; left: 16%; right: 3%; transform: rotate(2deg); }
.avatar { width: 46px; height: 46px; display: grid; place-items: center; border-radius: 50%; background: var(--accent); color: #111; font-weight: 850; }
.avatar.light { background: #d9dcff; }
.message-card span:nth-child(2) { display: grid; gap: 5px; }
.message-card b { font-size: .88rem; }
.message-card i { color: #aeb4bd; font-size: .82rem; font-style: normal; }
.message-card em { color: #9ea5ae; font-size: .72rem; font-style: normal; }
.privacy-chip { position: absolute; bottom: 7%; left: 50%; transform: translateX(-50%); white-space: nowrap; display: flex; align-items: center; gap: 9px; padding: 10px 15px; border: 1px solid rgba(183,255,74,.25); border-radius: 999px; background: rgba(15,18,22,.88); color: #dce4d2; font-size: .76rem; }
.privacy-chip svg { width: 16px; color: var(--accent); }

.quick-path { min-height: 130px; padding: 28px 38px; display: grid; grid-template-columns: 1fr 60px 1fr 60px 1fr; align-items: center; gap: 15px; border: 1px solid var(--line); border-radius: var(--radius); background: var(--surface); }
.path-item { display: flex; gap: 15px; align-items: flex-start; }
.path-item > span { color: var(--accent); font-size: .73rem; font-weight: 850; }
.path-item b { display: block; margin-bottom: 6px; font-size: .92rem; }
.path-item p { margin: 0; color: var(--muted); font-size: .78rem; line-height: 1.45; }
.path-line { height: 1px; background: var(--line); }

.section { padding-block: 130px 20px; }
.section-heading { max-width: 720px; margin-bottom: 38px; }
.section-heading.compact { max-width: 850px; }
h2 { margin-bottom: 18px; font-size: clamp(2.25rem, 5vw, 4.5rem); line-height: 1.02; letter-spacing: -.055em; }
.section-heading > p:last-child, .security-copy > p:last-child { color: var(--muted); font-size: 1.04rem; line-height: 1.65; }
.connect-card { padding: 42px; display: grid; grid-template-columns: 230px 1fr; gap: 56px; align-items: center; border: 1px solid var(--line); border-radius: 30px; background: linear-gradient(135deg, var(--surface-strong), var(--bg-soft)); }
.qr-wrap { padding: 18px; display: grid; justify-items: center; gap: 13px; border-radius: 22px; background: #fff; color: #282c31; }
.qr-wrap img { display: block; width: 100%; height: auto; }
.qr-wrap span { font-size: .72rem; font-weight: 750; }
.pill, .recommend-badge { width: fit-content; display: inline-flex; padding: 6px 9px; border: 1px solid color-mix(in srgb, var(--accent) 35%, transparent); border-radius: 999px; color: var(--accent); font-size: .68rem; font-weight: 850; letter-spacing: .05em; text-transform: uppercase; }
.connect-copy h3 { margin: 18px 0 12px; font-size: clamp(1.7rem, 3vw, 2.5rem); letter-spacing: -.04em; }
.connect-copy > p { max-width: 660px; color: var(--muted); line-height: 1.6; }
.text-button { min-height: 52px; padding: 0 8px; border: 0; background: transparent; color: var(--text); text-decoration: underline; text-underline-offset: 5px; cursor: pointer; }
.clarification { margin: 16px 0 0; font-size: .76rem; }

.device-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 14px; }
.device-card { position: relative; min-height: 285px; padding: 28px; display: flex; flex-direction: column; align-items: flex-start; border: 1px solid var(--line); border-radius: 22px; background: var(--surface); }
.device-card.recommended { background: linear-gradient(160deg, color-mix(in srgb, var(--accent) 7%, var(--surface-strong)), var(--surface)); }
.recommend-badge { position: absolute; top: 22px; right: 22px; }
.device-icon { width: 46px; height: 46px; margin-bottom: 45px; display: grid; place-items: center; border: 1px solid var(--line); border-radius: 14px; }
.device-icon svg { width: 23px; }
.device-card h3 { margin-bottom: 10px; font-size: 1.08rem; }
.device-card > p { min-height: 58px; margin-bottom: 18px; color: var(--muted); font-size: .82rem; line-height: 1.5; }
.card-links { display: flex; flex-wrap: wrap; gap: 8px 14px; }
.card-link { color: var(--text); font-size: .78rem; font-weight: 780; border-bottom: 1px solid var(--text); padding-bottom: 3px; }
.card-link.muted { color: var(--muted); border-color: var(--muted); }

.security { margin-top: 110px; padding: 72px; display: grid; grid-template-columns: 1.05fr .95fr; gap: 80px; align-items: center; border-radius: 32px; background: var(--accent); color: var(--accent-text); }
.security .eyebrow, .security-copy > p:last-child { color: color-mix(in srgb, var(--accent-text) 70%, transparent); }
.security h2 { font-size: clamp(2.2rem, 4.2vw, 4rem); }
.security-list { display: grid; }
.security-list > div { padding: 21px 0; display: flex; gap: 14px; border-bottom: 1px solid color-mix(in srgb, var(--accent-text) 16%, transparent); }
.security-list > div:last-child { border: 0; }
.security-list > div > span { width: 28px; height: 28px; flex: 0 0 auto; display: grid; place-items: center; border: 1px solid currentColor; border-radius: 50%; font-size: .72rem; }
.security-list p { margin: 0; display: grid; gap: 5px; }
.security-list b { font-size: .92rem; }
.security-list small { opacity: .68; }

.faq-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
details { padding: 0 23px; border: 1px solid var(--line); border-radius: 17px; background: var(--surface); }
summary { min-height: 70px; display: flex; align-items: center; justify-content: space-between; gap: 20px; font-size: .93rem; font-weight: 750; cursor: pointer; list-style: none; }
summary::-webkit-details-marker { display: none; }
summary::after { content: "+"; color: var(--muted); font-size: 1.3rem; font-weight: 400; }
details[open] summary::after { content: "−"; }
details p { padding: 0 0 22px; margin: 0; color: var(--muted); font-size: .84rem; line-height: 1.6; }
code { padding: 2px 5px; border-radius: 5px; background: var(--surface); color: var(--text); }

.final-cta { margin-top: 130px; padding: 65px 70px; display: flex; justify-content: space-between; align-items: center; gap: 45px; border-radius: 30px; background: #171a21; color: #fff; }
.final-cta h2 { max-width: 720px; margin: 0; font-size: clamp(2rem, 4vw, 3.7rem); }
.final-cta .eyebrow { color: #aeb4bd; }
.final-cta .button { flex: 0 0 auto; }
.site-footer { min-height: 180px; padding-block: 60px; display: grid; grid-template-columns: auto 1fr auto; gap: 28px; align-items: center; }
.site-footer p { margin: 0; color: var(--muted); font-size: .82rem; }
.site-footer > div { display: flex; gap: 22px; }

@media (max-width: 980px) {
  .hero { grid-template-columns: 1fr; gap: 48px; padding-top: 75px; }
  .hero-copy { text-align: center; margin: auto; }
  .hero-copy .eyebrow, .hero-actions { justify-content: center; }
  .hero-visual { min-height: 390px; }
  .device-grid { grid-template-columns: 1fr 1fr; }
  .security { grid-template-columns: 1fr; gap: 30px; padding: 55px; }
}

@media (max-width: 720px) {
  .shell, .header-inner { width: min(100% - 28px, 1180px); }
  .header-inner { min-height: 64px; }
  .header-nav, .icon-button, .brand-by { display: none; }
  .header-actions { margin-left: auto; }
  .hero { min-height: 0; padding: 65px 0 45px; }
  h1 { font-size: clamp(3rem, 15vw, 4.5rem); }
  .hero-actions .button { width: 100%; }
  .hero-visual { min-height: 330px; border-radius: 27px; }
  .message-card { left: 5%; right: 5%; grid-template-columns: 40px 1fr auto; }
  .message-two { left: 10%; }
  .avatar { width: 40px; height: 40px; }
  .quick-path { grid-template-columns: 1fr; padding: 28px; }
  .path-line { width: 1px; height: 20px; margin-left: 12px; }
  .section { padding-top: 95px; }
  .connect-card { grid-template-columns: 1fr; padding: 25px; gap: 30px; }
  .qr-wrap { width: min(100%, 230px); margin: auto; }
  .device-grid, .faq-grid { grid-template-columns: 1fr; }
  .device-card { min-height: 235px; }
  .security { width: 100%; margin-top: 90px; padding: 55px 28px; border-radius: 0; }
  .final-cta { width: 100%; margin-top: 95px; padding: 55px 28px; flex-direction: column; align-items: flex-start; border-radius: 0; }
  .site-footer { grid-template-columns: 1fr; }
}

@media (prefers-reduced-motion: reduce) {
  :root { scroll-behavior: auto; }
  *, *::before, *::after { transition-duration: .01ms !important; }
}