:root {
  color-scheme: dark;
  --ink: #0a0d16;
  --panel: #101623;
  --surface: #0d121e;
  --border: #283246;
  --text: #f4f7ff;
  --muted: #aebbd0;
  --quiet: #899ab5;
  --cyan: #80e9f4;
  --lilac: #c5adfa;
  --salmon: #ff9c85;
  --mono: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  --gutter: clamp(18px, 4vw, 54px);
}
*, *::before, *::after { box-sizing: border-box; }
[hidden] { display: none !important; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--ink);
  color: var(--text);
  font: 16px/1.6 -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  -webkit-font-smoothing: antialiased;
}
img { display: block; max-width: 100%; }
a { color: inherit; }
button { font: inherit; }
:focus-visible { outline: 2px solid var(--cyan); outline-offset: 4px; }
p, h1, h2, h3, figure, dl, dd { margin: 0; }
h1, h2, h3 { line-height: 1.07; letter-spacing: -.035em; }
p { color: var(--muted); }
section[id] { scroll-margin-top: 20px; }
.shell { width: min(1240px, calc(100% - var(--gutter) * 2)); margin-inline: auto; }
.skip {
  position: fixed; top: 10px; left: 10px; transform: translateY(-160%);
  z-index: 3; color: var(--ink); background: var(--cyan); padding: 10px 16px; border-radius: 6px;
}
.skip:focus { transform: none; }

.site-header { border-bottom: 1px solid var(--border); background: #0c1019; }
.topbar { display: grid; grid-template-columns: 1fr auto 1fr; align-items: center; gap: 16px; min-height: 74px; }
.brand { display: inline-flex; align-items: center; gap: 9px; justify-self: start; color: var(--text); font-size: 21px; font-weight: 700; letter-spacing: -.045em; text-decoration: none; }
.brand img { flex: none; border-radius: 8px; }
.site-nav { display: flex; align-items: center; gap: clamp(10px, 2.7vw, 38px); }
.site-nav a, .back { color: var(--muted); font-size: 14px; font-weight: 600; text-decoration: none; padding: 10px 2px; }
.site-nav a:hover, .back:hover { color: var(--cyan); }
.languages {
  justify-self: end; display: flex; align-items: center; border: 1px solid var(--border);
  border-radius: 9px; padding: 3px; font: 650 12px/1 var(--mono);
}
.languages a { display: grid; place-items: center; min-width: 42px; min-height: 36px; border-radius: 6px; color: var(--muted); text-decoration: none; }
.languages a[aria-current] { background: #1e2c3d; color: var(--cyan); }
.languages a:hover { color: var(--cyan); }

.hero { display: grid; grid-template-columns: minmax(0, .94fr) minmax(0, 1.06fr); gap: clamp(24px, 5vw, 76px); align-items: center; padding-block: clamp(44px, 7vw, 108px) clamp(51px, 6vw, 88px); }
.eyebrow, figcaption {
  color: var(--cyan); font: 650 .72rem/1.4 var(--mono); letter-spacing: .15em;
}
.hero-copy .eyebrow { display: flex; align-items: center; gap: 10px; }
.beacon { display: inline-block; flex: 0 0 auto; width: 7px; height: 7px; border-radius: 50%; background: var(--cyan); box-shadow: 0 0 13px #80e9f480; }
.hero h1 { margin: 18px 0 20px; font-size: clamp(3.25rem, 6.25vw, 6.1rem); font-weight: 750; letter-spacing: -.061em; word-spacing: .035em; line-height: .96; }
.hero h1 em { display: block; color: var(--cyan); font-style: normal; }
@supports (background-clip: text) {
  .hero h1 em { background: linear-gradient(100deg, var(--cyan) 5%, #a5bafa 74%, var(--lilac)); background-clip: text; color: transparent; padding-bottom: .1em; margin-bottom: -.1em; }
}
.hero-intro { font-size: clamp(1.07rem, 1.6vw, 1.26rem); line-height: 1.54; max-width: 38ch; }
.actions { display: flex; gap: 10px; flex-wrap: wrap; margin-top: 28px; }
.button {
  display: inline-flex; justify-content: center; align-items: center; gap: 10px; min-height: 47px;
  border: 1px solid transparent; padding: 10px 15px; border-radius: 9px; font-size: .91rem;
  font-weight: 700; text-decoration: none; transition: background-color .18s, border-color .18s;
}
.primary { background: var(--cyan); color: #081621; }
.primary:hover { background: #b2f6fc; }
.secondary { border-color: var(--border); background: var(--surface); }
.secondary:hover { border-color: var(--cyan); }
.hero-meta { display: flex; flex-wrap: wrap; gap: 6px 17px; margin: 23px 0 0; padding: 0; list-style: none; color: var(--quiet); font: 500 .71rem/1.5 var(--mono); }
.hero-meta li::before { content: ""; display: inline-block; vertical-align: 2px; width: 4px; height: 4px; margin-right: 7px; background: var(--cyan); border-radius: 50%; }
.hero-art, .library-art { overflow: hidden; border-radius: 18px; border: 1px solid var(--border); background: #0f1521; }
.hero-art { box-shadow: 0 14px 65px #3c6b971f; }
.hero-art img, .library-art img { width: 100%; height: auto; aspect-ratio: 3 / 2; object-fit: cover; }
figcaption { display: flex; justify-content: space-between; gap: 10px; border-top: 1px solid var(--border); padding: 11px 15px; color: var(--quiet); font-size: .62rem; }
figcaption span:last-child { color: var(--cyan); white-space: nowrap; }

.block { border-top: 1px solid var(--border); padding-block: clamp(36px, 6vw, 80px); }
.section-head { display: grid; gap: 12px; margin-bottom: 26px; }
.section-head h2 { max-width: 24ch; font-size: clamp(2.15rem, 4.3vw, 3.85rem); line-height: 1.02; letter-spacing: -.052em; text-wrap: balance; }
.section-head p:not(.eyebrow) { max-width: 62ch; }
.steps { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 13px; }
.step { position: relative; border: 1px solid var(--border); background: linear-gradient(150deg, #141d2e, var(--surface) 70%); padding: clamp(17px, 2.4vw, 28px); border-radius: 15px; }
.step h3 { margin: 17px 0 10px; font-size: 1.27rem; }
.step p { font-size: .94rem; }
.step-icon { display: grid; place-items: center; width: 38px; height: 38px; color: var(--cyan); border-radius: 8px; background: #182c3a; }
.step-icon svg { width: 21px; height: 21px; }
.step:nth-child(2) .step-icon { color: var(--lilac); background: #27233e; }
.step:nth-child(3) .step-icon { color: var(--salmon); background: #31232d; }
.step-number { position: absolute; top: 23px; right: 20px; color: var(--quiet); font: 500 .72rem var(--mono); }

.listen-frame { display: grid; grid-template-columns: minmax(0, .73fr) minmax(0, 1.27fr); gap: clamp(22px, 5vw, 64px); align-items: center; }
.listen-frame .section-head { margin: 0; }
.demo { min-width: 0; border: 1px solid var(--border); border-radius: 15px; background: linear-gradient(155deg, #182139, #101522 66%); padding: clamp(12px, 2.3vw, 24px); }
.demo-header { display: flex; align-items: center; justify-content: space-between; gap: 8px; margin-bottom: 12px; }
.demo-name { display: flex; gap: 8px; align-items: center; color: var(--muted); font: 500 .73rem/1.4 var(--mono); }
.demo-badge { color: var(--lilac); white-space: nowrap; font: 650 .69rem var(--mono); }
.demo-visual { border: 1px solid var(--border); background: #0c1120; border-radius: 8px; padding: 8px 10px; }
.demo-visual img { width: 100%; height: auto; }
.demo-options { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 5px; margin-top: 12px; }
.demo-options button {
  padding: 7px 4px; min-height: 44px; color: var(--muted); background: var(--surface);
  border: 1px solid var(--border); border-radius: 7px; cursor: pointer; font-size: clamp(.72rem, 1.45vw, .88rem); font-weight: 650;
}
.demo-options button:hover { border-color: var(--cyan); }
.demo-options button[aria-pressed="true"] { background: var(--cyan); border-color: var(--cyan); color: #081621; }
.demo-options button[data-variant="raised"][aria-pressed="true"] { background: var(--lilac); border-color: var(--lilac); }
.demo-options button[data-variant="slower"][aria-pressed="true"] { background: var(--salmon); border-color: var(--salmon); }
.demo-status { margin: 12px 0 6px; color: var(--text); font: 500 .73rem/1.4 var(--mono); }
.demo audio { display: block; width: 100%; }
.demo-note, .no-script { margin-top: 10px; color: var(--quiet); font-size: .79rem; }
.no-script a { color: var(--cyan); }

.signal-board { background: var(--panel); border: 1px solid var(--border); padding: clamp(12px, 2.5vw, 24px); border-radius: 15px; }
.signal-head { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 6px 12px; margin-bottom: 14px; }
.signal-head h3 { font-size: 1.02rem; }
.signal-head span { padding: 4px 7px; border-radius: 4px; background: #30232c; color: var(--salmon); font: 650 .63rem var(--mono); letter-spacing: .09em; }
.signal-grid { display: grid; grid-template-columns: minmax(0, 1.1fr) minmax(0, 1fr); gap: 10px; }
.signal-chart { display: grid; place-items: center; border: 1px solid var(--border); border-radius: 8px; background: #0c111c; padding: 12px; }
.signal-chart img { width: 100%; height: auto; }
.readings { display: grid; grid-template-columns: repeat(6, minmax(0, 1fr)); gap: 6px; }
.reading { grid-column: span 2; display: grid; align-content: center; gap: 6px; border: 1px solid #242d40; border-radius: 7px; background: #0d1320; padding: 10px; }
.reading:nth-child(n+4) { grid-column: span 3; padding: 8px; }
.reading dt { font-size: .74rem; line-height: 1.2; color: var(--muted); }
.reading dd { font: 650 clamp(.92rem, 1.5vw, 1.3rem)/1.12 var(--mono); color: var(--text); }
.reading:nth-child(-n+3) dd { color: var(--cyan); }
.reading small { font-size: .64rem; font-weight: 500; white-space: nowrap; color: var(--muted); }
.meter-help { display: grid; grid-template-columns: 1fr 1fr; gap: 14px 32px; margin-top: 18px; }
.meter-help h3 { font-size: 1rem; margin-bottom: 6px; }
.meter-help p { font-size: .92rem; }

.library { display: grid; grid-template-columns: minmax(0, 1.05fr) minmax(0, .95fr); align-items: center; gap: clamp(23px, 5vw, 68px); }
.library-list { border-top: 1px solid var(--border); }
.library-list > div { position: relative; border-bottom: 1px solid var(--border); padding: 13px 0 13px 20px; }
.library-list > div::before { position: absolute; content: ""; top: 20px; left: 1px; width: 6px; height: 6px; border: 1px solid var(--cyan); border-radius: 2px; transform: rotate(45deg); }
.library-list dt { color: var(--text); font-weight: 700; }
.library-list dd { color: var(--muted); font-size: .92rem; }

.formats { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.formats > div { border: 1px solid var(--border); border-radius: 12px; padding: 16px; background: var(--surface); }
.formats h3 { font: 650 .77rem/1.5 var(--mono); letter-spacing: .05em; color: var(--quiet); }
.formats ul { display: flex; flex-wrap: wrap; gap: 6px; padding: 0; margin: 10px 0 0; list-style: none; }
.formats li { border: 1px solid #2f4f62; background: #172a3b; color: var(--cyan); border-radius: 5px; padding: 4px 8px; font: 650 .79rem/1.4 var(--mono); }
.formats > div:nth-child(2) li { border-color: #463a62; background: #24213a; color: var(--lilac); }
.formats small { font: inherit; opacity: .75; }
.format-note { margin-top: 16px; max-width: 73ch; font-size: .93rem; }

.faq { display: grid; grid-template-columns: minmax(0, .7fr) minmax(0, 1.3fr); gap: 16px 35px; }
.faq .section-head { align-content: start; margin-bottom: 0; }
.questions { border-top: 1px solid var(--border); }
.questions details { border-bottom: 1px solid var(--border); padding: 3px 0; }
.questions summary { display: flex; align-items: center; justify-content: space-between; gap: 12px; min-height: 45px; padding: 7px 0; cursor: pointer; font-weight: 650; list-style: none; }
.questions summary::-webkit-details-marker { display: none; }
.questions summary::after { content: ""; flex: none; width: 8px; height: 8px; border: solid var(--cyan); border-width: 0 1.5px 1.5px 0; transform: rotate(45deg); margin-right: 5px; }
.questions details[open] summary::after { transform: rotate(225deg); }
.questions p { padding: 2px 22px 13px 0; font-size: .93rem; }
.site-footer { border-top: 1px solid var(--border); background: #0c1019; }
.footer-inner { display: flex; align-items: center; justify-content: space-between; gap: 10px 20px; padding-block: 24px; }
.footer-inner p { margin-top: 5px; font-size: .83rem; }
.back { flex: none; }

@media (max-width: 900px) {
  .signal-grid { grid-template-columns: minmax(0, 1fr); }
  .signal-chart img { max-width: 560px; }
}
@media (max-width: 760px) {
  .hero { grid-template-columns: 1fr; gap: 25px; }
  .hero h1 { font-size: clamp(3.25rem, 9.3vw, 5rem); }
  .hero-intro { max-width: 49ch; }
  .steps { grid-template-columns: 1fr; }
  .listen-frame, .library, .faq { grid-template-columns: 1fr; }
  .library-art { max-width: 580px; }
}
@media (max-width: 510px) {
  .topbar { grid-template-columns: 1fr 1fr; gap: 0 10px; padding-top: 9px; }
  .site-nav { grid-column: 1 / -1; grid-row: 2; justify-content: space-between; gap: 10px; margin-top: 4px; }
  .site-nav a { padding-inline: 1px; min-height: 44px; }
  .languages { grid-column: 2; grid-row: 1; }
  .hero h1 { margin-top: 14px; }
  .hero-art, .library-art, .step, .demo, .signal-board { border-radius: 12px; }
  .meter-help, .formats { grid-template-columns: 1fr; }
  .reading { padding: 7px; }
  .reading small { display: inline-block; }
  .footer-inner { flex-wrap: wrap; }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { transition: none !important; }
}