/* Syntheremin Instrument — a pocket theremin. Deep-space instrument panel: near-black
   navy, one cyan→violet glow (the icon's rod and loop), luminous type. */

@font-face {
  font-family: "Switzer";
  src: url("/fonts/switzer-variable.woff2") format("woff2");
  font-weight: 100 900;
  font-display: swap;
}
@font-face {
  font-family: "Geist Mono";
  src: url("/fonts/geist-mono-variable.woff2") format("woff2");
  font-weight: 100 900;
  font-display: swap;
}

:root {
  --bg: #06070f;
  --panel: #0b0d1c;
  --panel-2: #10132a;
  --ink: #eef0ff;
  --ink-dim: rgba(238, 240, 255, 0.62);
  --line: rgba(238, 240, 255, 0.14);
  --cyan: #6ee7ff;
  --violet: #b18cff;
  --glow: 0 0 24px rgba(110, 231, 255, 0.35), 0 0 64px rgba(177, 140, 255, 0.18);
  --sans: "Switzer", -apple-system, BlinkMacSystemFont, sans-serif;
  --mono: "Geist Mono", ui-monospace, SFMono-Regular, monospace;
  --shell: min(1120px, calc(100vw - 48px));
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background:
    radial-gradient(1100px 520px at 78% -8%, rgba(177, 140, 255, 0.14), transparent 62%),
    radial-gradient(900px 480px at 12% 4%, rgba(110, 231, 255, 0.1), transparent 58%),
    var(--bg);
  color: var(--ink);
  font: 400 16px/1.65 var(--sans);
  -webkit-font-smoothing: antialiased;
}

/* faint tuning-grid over the whole page */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  background:
    linear-gradient(var(--line) 1px, transparent 1px) 0 0 / 100% 96px,
    linear-gradient(90deg, var(--line) 1px, transparent 1px) 0 0 / 96px 100%;
  opacity: 0.16;
  pointer-events: none;
}

.skip-link {
  position: absolute;
  left: -999px;
}
.skip-link:focus {
  left: 16px;
  top: 12px;
  z-index: 10;
  background: var(--cyan);
  color: #04121a;
  padding: 8px 14px;
}

a { color: inherit; }

.section-shell {
  width: var(--shell);
  margin-inline: auto;
  position: relative;
}

/* ------------------------------------------------------------- header */
.site-header {
  width: var(--shell);
  margin: 0 auto;
  padding: 22px 0;
  display: flex;
  align-items: center;
  gap: 28px;
}
.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
  font-weight: 640;
  letter-spacing: 0.01em;
}
.brand img { border-radius: 10px; display: block; }
.site-header nav {
  display: flex;
  gap: 22px;
  margin-left: auto;
}
.site-header nav a {
  text-decoration: none;
  color: var(--ink-dim);
  font-size: 0.92rem;
}
.site-header nav a:hover { color: var(--cyan); }

.button {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  text-decoration: none;
  font-weight: 600;
  border: 1px solid var(--line);
  padding: 10px 18px;
  border-radius: 999px;
  transition: box-shadow 0.25s, border-color 0.25s, transform 0.25s;
}
.button-primary {
  border-color: rgba(110, 231, 255, 0.5);
  color: var(--cyan);
}
.button-primary:hover {
  box-shadow: var(--glow);
  transform: translateY(-1px);
}
.button-small { padding: 8px 14px; font-size: 0.88rem; }

/* --------------------------------------------------------------- hero */
.hero {
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
  align-items: center;
  gap: 48px;
  padding: 64px 0 84px;
}
.eyebrow {
  font-family: var(--mono);
  font-size: 0.68rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--cyan);
  margin: 0 0 14px;
}
.hero h1 {
  margin: 0 0 18px;
  font-size: clamp(2.8rem, 6vw, 4.6rem);
  line-height: 0.98;
  font-weight: 720;
  letter-spacing: -0.03em;
}
.hero h1 em {
  font-style: normal;
  background: linear-gradient(92deg, var(--cyan), var(--violet));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.lede {
  color: var(--ink-dim);
  font-size: 1.08rem;
  max-width: 46ch;
  margin: 0 0 26px;
}
.hero-actions { display: flex; align-items: center; gap: 22px; flex-wrap: wrap; }
.text-link {
  color: var(--ink-dim);
  text-decoration: none;
  border-bottom: 1px solid var(--line);
  padding-bottom: 2px;
}
.text-link:hover { color: var(--cyan); border-color: var(--cyan); }
.trust-list {
  list-style: none;
  display: flex;
  gap: 20px;
  flex-wrap: wrap;
  padding: 0;
  margin: 30px 0 0;
  font-family: var(--mono);
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--ink-dim);
}
.trust-list li::before { content: "◦ "; color: var(--violet); }

/* hero art: the icon's antenna + loop, drawn live */
.hero-art {
  position: relative;
  aspect-ratio: 1 / 1;
  max-width: 480px;
  justify-self: end;
  width: 100%;
}
.rod {
  position: absolute;
  left: 50%;
  top: 4%;
  bottom: 4%;
  width: 4px;
  transform: translateX(-50%);
  border-radius: 4px;
  background: linear-gradient(180deg, transparent, var(--cyan) 18%, #fff 50%, var(--violet) 82%, transparent);
  box-shadow: var(--glow);
  animation: hum 5s ease-in-out infinite;
}
.loop {
  position: absolute;
  left: 6%;
  right: 6%;
  top: 50%;
  aspect-ratio: 2.4 / 1;
  transform: translateY(-50%) rotate(-14deg);
  border: 3px solid transparent;
  border-radius: 50%;
  background:
    linear-gradient(var(--bg), var(--bg)) padding-box,
    linear-gradient(110deg, var(--violet), var(--cyan), var(--violet)) border-box;
  box-shadow: var(--glow);
  animation: orbit 9s ease-in-out infinite;
}
.loop::after {
  content: "";
  position: absolute;
  inset: -3px;
  border-radius: 50%;
  box-shadow: inset 0 0 32px rgba(110, 231, 255, 0.12);
}
.hero-note {
  position: absolute;
  font-family: var(--mono);
  font-size: 0.66rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--ink-dim);
}
.hero-note-pitch { top: 6%; left: 56%; }
.hero-note-volume { bottom: 10%; left: 2%; }

@keyframes hum {
  0%, 100% { opacity: 0.85; }
  50% { opacity: 1; filter: brightness(1.25); }
}
@keyframes orbit {
  0%, 100% { transform: translateY(-50%) rotate(-14deg) scale(1); }
  50% { transform: translateY(-52%) rotate(-11deg) scale(1.03); }
}

/* animated sine divider */
.wave {
  display: block;
  width: 100%;
  height: 72px;
  overflow: hidden;
}
.wave path {
  fill: none;
  stroke: url(#waveGrad);
  stroke-width: 2;
  stroke-dasharray: 6 8;
  animation: flow 3.2s linear infinite;
}
@keyframes flow { to { stroke-dashoffset: -140; } }

/* ------------------------------------------------------------ sections */
.section-heading { max-width: 60ch; }
.section-heading h2 {
  margin: 0 0 14px;
  font-size: clamp(1.9rem, 3.6vw, 2.8rem);
  line-height: 1.05;
  letter-spacing: -0.02em;
  font-weight: 680;
}
.section-intro { color: var(--ink-dim); max-width: 58ch; margin: 0; }

.gesture-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
  margin-top: 44px;
}
.gesture-card {
  background: linear-gradient(180deg, var(--panel-2), var(--panel));
  border: 1px solid var(--line);
  border-radius: 18px;
  padding: 26px 24px 30px;
  position: relative;
  overflow: hidden;
}
.gesture-card::after {
  content: "";
  position: absolute;
  inset: auto -30% -55% -30%;
  height: 70%;
  background: radial-gradient(closest-side, rgba(110, 231, 255, 0.14), transparent);
  pointer-events: none;
}
.gesture-card.violet::after {
  background: radial-gradient(closest-side, rgba(177, 140, 255, 0.16), transparent);
}
.gesture-num {
  font-family: var(--mono);
  font-size: 0.68rem;
  letter-spacing: 0.12em;
  color: var(--violet);
}
.gesture-card h3 { margin: 12px 0 8px; font-size: 1.16rem; letter-spacing: -0.01em; }
.gesture-card p { margin: 0; color: var(--ink-dim); font-size: 0.95rem; }

.gesture-sign {
  font-family: var(--mono);
  font-size: 1.5rem;
  color: var(--cyan);
  display: block;
  margin-top: 6px;
}

.section-pad { padding: 84px 0; }

.feature {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: 56px;
  align-items: center;
  padding: 64px 0;
}
.feature-copy h2 {
  margin: 0 0 14px;
  font-size: clamp(1.7rem, 3vw, 2.4rem);
  line-height: 1.08;
  letter-spacing: -0.02em;
}
.feature-copy p { color: var(--ink-dim); max-width: 50ch; }
.check-list { list-style: none; margin: 22px 0 0; padding: 0; display: grid; gap: 10px; }
.check-list li { padding-left: 26px; position: relative; color: var(--ink-dim); }
.check-list li::before {
  content: "~";
  position: absolute;
  left: 0;
  color: var(--cyan);
  font-family: var(--mono);
}

/* voice visual: glowing glide trace */
.voice-panel {
  background: linear-gradient(180deg, var(--panel-2), var(--panel));
  border: 1px solid var(--line);
  border-radius: 20px;
  padding: 30px;
  position: relative;
  overflow: hidden;
}
.voice-panel svg { display: block; width: 100%; height: auto; }
.voice-panel .trace {
  fill: none;
  stroke: url(#traceGrad);
  stroke-width: 2.5;
  stroke-linecap: round;
  filter: drop-shadow(0 0 8px rgba(110, 231, 255, 0.6));
  stroke-dasharray: 640;
  stroke-dashoffset: 640;
  animation: draw 6s ease-in-out infinite;
}
@keyframes draw {
  0% { stroke-dashoffset: 640; }
  55%, 78% { stroke-dashoffset: 0; }
  100% { stroke-dashoffset: -640; }
}
.voice-meta {
  display: flex;
  justify-content: space-between;
  font-family: var(--mono);
  font-size: 0.64rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--ink-dim);
  margin-top: 14px;
}

/* privacy block */
.privacy-block {
  border: 1px solid var(--line);
  border-radius: 22px;
  background:
    radial-gradient(720px 300px at 88% 0%, rgba(177, 140, 255, 0.12), transparent 60%),
    linear-gradient(180deg, var(--panel-2), var(--panel));
  padding: clamp(30px, 5vw, 56px);
  display: grid;
  grid-template-columns: minmax(0, 1.4fr) minmax(0, 1fr);
  gap: 40px;
  align-items: center;
}
.privacy-block h2 { margin: 0 0 12px; font-size: clamp(1.7rem, 3vw, 2.3rem); letter-spacing: -0.02em; }
.privacy-block p { color: var(--ink-dim); max-width: 52ch; }
.privacy-facts { margin: 0; display: grid; gap: 14px; }
.privacy-facts > div {
  display: flex;
  justify-content: space-between;
  gap: 18px;
  border-bottom: 1px solid var(--line);
  padding-bottom: 12px;
}
.privacy-facts dt { color: var(--ink-dim); }
.privacy-facts dd { margin: 0; font-family: var(--mono); font-size: 0.85rem; color: var(--cyan); }

/* faq */
.faq-list { margin-top: 36px; display: grid; gap: 10px; }
.faq-list details {
  border: 1px solid var(--line);
  border-radius: 14px;
  background: var(--panel);
  padding: 0 20px;
}
.faq-list summary {
  cursor: pointer;
  list-style: none;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  padding: 16px 0;
  font-weight: 600;
}
.faq-list summary::-webkit-details-marker { display: none; }
.faq-list summary span { color: var(--violet); font-family: var(--mono); }
.faq-list p { margin: 0 0 18px; color: var(--ink-dim); }

/* final cta */
.final-cta {
  text-align: center;
  padding: 90px 0 100px;
}
.final-cta h2 {
  font-size: clamp(2rem, 4.4vw, 3.2rem);
  margin: 0 0 18px;
  letter-spacing: -0.025em;
}
.final-cta p { color: var(--ink-dim); margin: 0 auto 28px; max-width: 46ch; }

/* footer */
.site-footer {
  border-top: 1px solid var(--line);
  padding: 36px 0 48px;
}
.site-footer .section-shell {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 18px 30px;
}
.site-footer small { color: var(--ink-dim); margin-left: auto; }
.footer-links { display: flex; gap: 20px; flex-wrap: wrap; }
.footer-links a { color: var(--ink-dim); text-decoration: none; font-size: 0.9rem; }
.footer-links a:hover { color: var(--cyan); }

/* legal / prose pages */
.page-hero { padding: 70px 0 30px; }
.page-hero h1 { font-size: clamp(2.2rem, 5vw, 3.4rem); letter-spacing: -0.025em; line-height: 1; margin: 0 0 16px; }
.content-layout { display: grid; grid-template-columns: 200px minmax(0, 1fr); gap: 48px; padding: 30px 0 90px; }
.content-nav { position: sticky; top: 24px; align-self: start; display: grid; gap: 10px; }
.content-nav a { color: var(--ink-dim); text-decoration: none; font-size: 0.9rem; }
.content-nav a:hover { color: var(--cyan); }
.prose h2 { margin: 34px 0 10px; font-size: 1.3rem; letter-spacing: -0.01em; }
.prose p, .prose li { color: var(--ink-dim); }
.prose a { color: var(--cyan); }
.callout {
  border: 1px solid rgba(110, 231, 255, 0.35);
  border-radius: 14px;
  padding: 16px 20px;
  background: rgba(110, 231, 255, 0.06);
}

@media (max-width: 900px) {
  .hero, .feature, .privacy-block { grid-template-columns: 1fr; }
  .hero-art { justify-self: center; max-width: 360px; }
  .gesture-grid { grid-template-columns: 1fr; }
  .content-layout { grid-template-columns: 1fr; }
  .content-nav { position: static; display: flex; flex-wrap: wrap; gap: 14px; }
  .site-header nav { display: none; }
}

@media (prefers-reduced-motion: reduce) {
  .rod, .loop, .wave path, .voice-panel .trace { animation: none; }
}