:root {
  --bg: #fbf6ee;
  --bg-2: #fbf6ee;
  --surface: #ffffff;
  --surface-2: #f1eadf;
  --text: #1d2040;
  --muted: #5e5a75;
  --sep: #e6ddcf;
  --accent: #ffb547;
  --accent-text: #9a5b00;
  --on-accent: #2a1a00;
  --z1: #1a64bf;
  --z2: #2f7a17;
  --z3: #b88700;
  --z4: #c42e36;
  --z5: #6b3fa0;
  --card: #ffffff;
  --card-border: #e6ddcf;
  --shadow: 0 18px 50px rgba(29, 32, 64, 0.12);
  --radius: 18px;
  --max-w: 920px;
  --text-w: 760px;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0e1024;
    --bg-2: #1d2040;
    --surface: #262a52;
    --surface-2: #22243a;
    --text: #f3efe6;
    --muted: #a3a1b8;
    --sep: #33375f;
    --accent: #ffb547;
    --accent-text: #ffb547;
    --on-accent: #2a1a00;
    --z1: #5cb4ff;
    --z2: #7be34f;
    --z3: #ffb547;
    --z4: #ff5a5f;
    --z5: #c77dff;
    --card: rgba(255, 255, 255, 0.05);
    --card-border: rgba(255, 255, 255, 0.09);
    --shadow: 0 18px 50px rgba(0, 0, 0, 0.35);
  }
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: radial-gradient(ellipse at top, var(--bg-2), var(--bg) 62%);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  line-height: 1.62;
  min-height: 100vh;
}

.wrap {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 24px;
}

.skip {
  position: absolute;
  left: -9999px;
  top: 0;
  background: var(--accent);
  color: var(--on-accent);
  padding: 10px 16px;
  border-radius: 0 0 10px 0;
  font-weight: 700;
}
.skip:focus { left: 0; z-index: 20; }

header.site {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 22px 24px;
  max-width: var(--max-w);
  margin: 0 auto;
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  font-size: 1.15rem;
  letter-spacing: 0.02em;
  text-decoration: none;
  color: var(--text);
}

.logo-mark {
  width: 36px;
  height: 21px;
  flex: none;
}

.logo-mark .seg { stroke-width: 3.4; stroke-linecap: butt; }
.logo-mark .s1 { stroke: var(--z1); }
.logo-mark .s2 { stroke: var(--z2); }
.logo-mark .s3 { stroke: var(--z3); }
.logo-mark .s4 { stroke: var(--z4); }
.logo-mark .s5 { stroke: var(--z5); }

.lang-menu { position: relative; }
.lang-menu summary {
  list-style: none;
  cursor: pointer;
  display: inline-block;
  background: var(--accent);
  color: var(--on-accent);
  font-size: 0.85rem;
  font-weight: 700;
  padding: 7px 15px;
  border-radius: 999px;
}
.lang-menu summary::-webkit-details-marker { display: none; }
.lang-menu ul {
  position: absolute;
  z-index: 10;
  right: 0;
  top: calc(100% + 8px);
  margin: 0;
  min-width: 170px;
  padding: 6px;
  list-style: none;
  background: var(--surface);
  border: 1px solid var(--card-border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}
.lang-menu a {
  display: block;
  padding: 7px 12px;
  color: var(--muted);
  text-decoration: none;
  border-radius: 9px;
  font-size: 0.9rem;
}
.lang-menu a:hover, .lang-menu a.active { background: var(--surface-2); color: var(--accent-text); }

main {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 10px 24px 72px;
}

h1 {
  font-size: clamp(2rem, 5vw, 3rem);
  line-height: 1.12;
  letter-spacing: -0.015em;
  margin: 0.1em 0 0.35em;
}

h2 {
  font-size: clamp(1.35rem, 3vw, 1.6rem);
  line-height: 1.25;
  margin: 2.6em 0 0.6em;
}

h3 { font-size: 1.05rem; margin: 0 0 8px; }

p { color: var(--muted); }
main > p, .lead { font-size: 1.05rem; }

a { color: var(--accent-text); }

.eyebrow {
  text-transform: uppercase;
  letter-spacing: 0.14em;
  font-size: 0.75rem;
  color: var(--accent-text);
  font-weight: 700;
}

.hero {
  position: relative;
  overflow: hidden;
  border-radius: 26px;
  margin: 8px 0 56px;
  min-height: 530px;
  display: flex;
  align-items: center;
  background: #0e1024;
  box-shadow: var(--shadow);
}

.hero-art {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
}

.hero .content {
  position: relative;
  z-index: 1;
  padding: 48px 46px;
  max-width: 700px;
}

.hero .eyebrow { color: #ffd19e; }

.hero h1 { color: #f3efe6; }

.hero p.lead {
  color: rgba(243, 239, 230, 0.82);
  max-width: 58ch;
  margin-bottom: 26px;
}

.badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 9px 18px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.14);
  color: #f3efe6;
  font-size: 0.9rem;
}

.hero .arc-track { fill: none; stroke: #33375f; stroke-width: 64; }
.hero .arc-seg { fill: none; stroke-width: 64; stroke-linecap: butt; }
.hero .a1 { stroke: #5cb4ff; }
.hero .a2 { stroke: #7be34f; }
.hero .a3 { stroke: #ffb547; }
.hero .a4 { stroke: #ff5a5f; }
.hero .a5 { stroke: #c77dff; }

.steps { display: grid; gap: 14px; margin-top: 1em; }

.step {
  display: flex;
  gap: 16px;
  align-items: flex-start;
  background: var(--card);
  border: 1px solid var(--card-border);
  border-radius: var(--radius);
  padding: 18px 22px;
}

.step .num {
  flex: none;
  width: 34px;
  height: 34px;
  border-radius: 50%;
  background: var(--accent);
  color: var(--on-accent);
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
}

.step p { margin: 0; color: var(--muted); }
.step strong { color: var(--text); }

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(235px, 1fr));
  gap: 16px;
  margin-top: 1em;
}

.card {
  background: var(--card);
  border: 1px solid var(--card-border);
  border-radius: var(--radius);
  padding: 22px;
}

.card p { margin: 0; font-size: 0.95rem; }

.sensor { border-top: 3px solid var(--sep); }
.sensor.ok { border-top-color: var(--z2); }
.sensor.broadcast { border-top-color: var(--accent); }
.sensor.no { border-top-color: var(--z4); }
.sensor .tag {
  display: inline-block;
  font-size: 0.74rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin-bottom: 8px;
}
.sensor.ok .tag { color: var(--z2); }
.sensor.broadcast .tag { color: var(--accent-text); }
.sensor.no .tag { color: var(--z4); }

.note {
  font-size: 0.9rem;
  color: var(--muted);
  border-left: 3px solid var(--sep);
  padding-left: 14px;
  margin-top: 18px;
}

.callout {
  margin-top: 2.8em;
  border-radius: var(--radius);
  padding: 28px;
  background: linear-gradient(135deg, rgba(255, 181, 71, 0.14), rgba(255, 181, 71, 0.03));
  border: 1px solid rgba(255, 181, 71, 0.28);
}
.callout h2 { margin-top: 0; }
.callout p { margin-bottom: 0; }

.disclaimer {
  margin-top: 2.6em;
  padding-top: 18px;
  border-top: 1px solid var(--sep);
  font-size: 0.86rem;
  color: var(--muted);
}

footer.site {
  border-top: 1px solid var(--sep);
  margin-top: 64px;
  padding: 28px 24px 42px;
}

footer.site .wrap:first-child {
  display: flex;
  flex-wrap: wrap;
  gap: 18px;
  justify-content: space-between;
  align-items: center;
  font-size: 0.85rem;
  color: var(--muted);
}

footer.site a {
  color: var(--muted);
  text-decoration: none;
  margin-right: 18px;
}
footer.site a:hover { color: var(--accent-text); }

footer.site .disclaimer {
  border-top: 0;
  padding-top: 0;
  margin: 6px 0 0;
}


.legal-doc { max-width: var(--text-w); }
.legal-doc h1 { font-size: 1.95rem; }
.legal-doc h2 { font-size: 1.18rem; margin-top: 1.9em; color: var(--text); }
.legal-doc h3 { font-size: 1rem; color: var(--text); margin-bottom: 0.3em; }
.legal-doc p, .legal-doc li { color: var(--muted); font-size: 0.97rem; }
.legal-doc strong { color: var(--text); }
.legal-doc .updated { font-size: 0.85rem; margin-top: -0.6em; }

a.back {
  display: inline-block;
  margin-bottom: 1.6em;
  color: var(--accent-text);
  text-decoration: none;
  font-size: 0.9rem;
}
a.back:hover { text-decoration: underline; }

.faq-list { display: grid; gap: 10px; margin-top: 1em; }

.faq-list details {
  background: var(--card);
  border: 1px solid var(--card-border);
  border-radius: var(--radius);
  padding: 4px 22px;
}

.faq-list summary {
  list-style: none;
  cursor: pointer;
  font-weight: 600;
  color: var(--text);
  padding: 14px 28px 14px 0;
  position: relative;
}
.faq-list summary::-webkit-details-marker { display: none; }
.faq-list summary::after {
  content: "+";
  position: absolute;
  right: 0;
  top: 11px;
  font-size: 1.35rem;
  font-weight: 400;
  line-height: 1;
  color: var(--accent-text);
}
.faq-list details[open] summary::after { content: "–"; }
.faq-list details[open] summary { color: var(--accent-text); }
.faq-list p { margin: 0 0 14px; font-size: 0.96rem; }

dl.faq {
  margin: 1.2em 0 0;
  border-top: 1px solid var(--sep);
}

dl.faq dt {
  font-weight: 600;
  color: var(--text);
  padding-top: 18px;
}

dl.faq dd {
  margin: 4px 0 0;
  padding-bottom: 18px;
  border-bottom: 1px solid var(--sep);
  color: var(--muted);
  font-size: 0.96rem;
}


@media (max-width: 700px) {
  .hero { min-height: 560px; align-items: flex-start; }
  .hero .content { padding: 34px 24px 28px; }
  .hero-art { opacity: 0.55; }
  header.site { flex-wrap: wrap; gap: 12px; padding: 18px 20px; }
  main { padding: 8px 20px 56px; }
  footer.site { padding: 24px 20px 36px; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
}