:root {
  color-scheme: dark;
  --night: #07121b;
  --night-2: #0b1d29;
  --ink: #f4f7f2;
  --muted: #a8b8bd;
  --line: rgba(222, 245, 235, .16);
  --line-strong: rgba(222, 245, 235, .3);
  --mint: #9af3d0;
  --cyan: #70d7f3;
  --coral: #ff9b7d;
  --gold: #f3ca75;
  --electric: #b7f6ff;
  --blue: #5ea5ff;
  --panel: rgba(13, 34, 44, .78);
  --panel-strong: #102d39;
  --shadow: 0 24px 80px rgba(0, 0, 0, .34);
  font-family: Inter, ui-sans-serif, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  color: var(--ink);
  background: var(--night);
  line-height: 1.6;
  overflow-x: hidden;
}
body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  opacity: .22;
  background-image:
    linear-gradient(rgba(154, 243, 208, .05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(154, 243, 208, .05) 1px, transparent 1px);
  background-size: 48px 48px;
  mask-image: linear-gradient(to bottom, black, transparent 72%);
}
body::after {
  content: "";
  position: fixed;
  inset: 0;
  z-index: 60;
  pointer-events: none;
  opacity: .055;
  background: repeating-linear-gradient(to bottom, transparent 0, transparent 3px, rgba(183,246,255,.26) 4px);
  animation: scanline 12s linear infinite;
}
@keyframes scanline { from { transform: translateY(-8px); } to { transform: translateY(8px); } }

a { color: inherit; }
button, a { -webkit-tap-highlight-color: transparent; }
button { font: inherit; }
.site-progress { position: fixed; inset: 0 0 auto; z-index: 50; height: 3px; background: rgba(255,255,255,.06); }
.site-progress span { display: block; width: 0; height: 100%; background: var(--mint); transition: width 120ms linear; }

.site-nav, .site-header, .site-main, .site-footer { width: min(1240px, calc(100% - 40px)); margin: 0 auto; }
.site-nav {
  position: sticky;
  top: 3px;
  z-index: 40;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 22px 0;
  background: rgba(7, 18, 27, .78);
  backdrop-filter: blur(18px);
}
.site-nav::after { content: ""; position: absolute; right: 0; bottom: 0; left: 0; height: 1px; background: linear-gradient(90deg, transparent, var(--mint), transparent); opacity: .35; }
.brand-lockup { display: inline-flex; align-items: center; gap: 12px; text-decoration: none; }
.brand-mark { display: grid; place-items: center; width: 36px; height: 36px; border: 1px solid var(--mint); color: var(--mint); border-radius: 50%; font-weight: 850; font-size: 12px; }
.brand-name { font-weight: 850; letter-spacing: .01em; }
.brand-sub { display: block; color: var(--muted); font-size: 12px; }
.nav-actions { display: flex; align-items: center; gap: 8px; }
.nav-links { display: flex; align-items: center; gap: 4px; }
.nav-links a { padding: 8px 11px; color: var(--muted); text-decoration: none; border-radius: 6px; transition: color .2s ease, background .2s ease; }
.nav-links a:hover, .nav-links a[aria-current="page"] { color: var(--ink); background: rgba(154,243,208,.09); }
.nav-menu { display: none; border: 1px solid var(--line); color: var(--ink); background: transparent; border-radius: 6px; padding: 8px 10px; cursor: pointer; }
.language-switch { display: inline-flex; border: 1px solid var(--line); border-radius: 6px; overflow: hidden; }
.language-switch button { border: 0; border-left: 1px solid var(--line); min-height: 34px; padding: 5px 10px; background: transparent; color: var(--muted); cursor: pointer; }
.language-switch button:first-child { border-left: 0; }
.language-switch button.active { color: var(--night); background: var(--mint); }
.site-telemetry { display: flex; align-items: center; justify-content: space-between; gap: 12px; width: min(1240px, calc(100% - 40px)); margin: -6px auto 0; padding: 8px 0; color: var(--muted); font: 10px ui-monospace, SFMono-Regular, Menlo, monospace; letter-spacing: .12em; text-transform: uppercase; }
.site-telemetry > span { display: inline-flex; align-items: center; gap: 7px; }
.telemetry-dot { display: inline-block; width: 6px; height: 6px; border-radius: 50%; background: var(--mint); box-shadow: 0 0 12px var(--mint); animation: telemetry-pulse 1.8s ease-in-out infinite; }
.telemetry-status { color: var(--mint); }
.telemetry-clock { color: var(--electric); }
@keyframes telemetry-pulse { 50% { opacity: .35; transform: scale(.72); } }

.site-header { padding: 76px 0 82px; }
.hero-grid { display: grid; grid-template-columns: minmax(0, .9fr) minmax(420px, 1.1fr); gap: 52px; align-items: center; }
.eyebrow, .kicker { color: var(--mint); font-size: 12px; font-weight: 850; letter-spacing: .12em; text-transform: uppercase; }
h1, h2, h3, p { margin-top: 0; }
h1 { max-width: 720px; margin-bottom: 24px; font-size: 76px; line-height: 1.02; letter-spacing: -.02em; }
h1 span { color: var(--mint); }
.hero-copy h1 span:first-child { color: var(--ink); }
.page-hero h1 span:first-child { color: var(--ink); }
.hero-copy .lead { max-width: 660px; color: var(--muted); font-size: 20px; }
.actions { display: flex; flex-wrap: wrap; gap: 10px; align-items: center; margin: 28px 0; }
.button, .icon-button { display: inline-flex; align-items: center; justify-content: center; gap: 9px; min-height: 44px; border: 1px solid var(--line); border-radius: 6px; padding: 9px 15px; color: var(--ink); background: rgba(255,255,255,.04); text-decoration: none; font-weight: 800; cursor: pointer; transition: transform .2s ease, border-color .2s ease, background .2s ease; }
.button:hover, .icon-button:hover { transform: translateY(-2px); border-color: var(--line-strong); background: rgba(154,243,208,.1); }
.button.primary { color: var(--night); border-color: var(--mint); background: var(--mint); box-shadow: 0 12px 30px rgba(154,243,208,.16); }
.icon-button { width: 44px; padding: 9px; }
.micro-stats { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 18px; max-width: 620px; margin-top: 36px; }
.micro-stats strong { display: block; font-size: 25px; color: var(--ink); }
.micro-stats span { color: var(--muted); font-size: 13px; }

.hero-stage { position: relative; min-height: 500px; border: 1px solid var(--line); border-radius: 8px; overflow: hidden; background: #091922; box-shadow: var(--shadow); }
.hero-stage::before, .hero-stage::after { content: ""; position: absolute; z-index: 2; width: 18px; height: 18px; pointer-events: none; }
.hero-stage::before { top: 10px; left: 10px; border-top: 1px solid var(--electric); border-left: 1px solid var(--electric); }
.hero-stage::after { right: 10px; bottom: 10px; border-right: 1px solid var(--electric); border-bottom: 1px solid var(--electric); }
.stage-top { display: flex; justify-content: space-between; gap: 12px; padding: 16px 18px; border-bottom: 1px solid var(--line); color: var(--muted); font-size: 13px; }
.stage-live { color: var(--mint); }
.stage-hud { position: absolute; top: 78px; right: 18px; left: 18px; z-index: 3; display: flex; justify-content: space-between; color: rgba(183,246,255,.68); font: 10px ui-monospace, SFMono-Regular, Menlo, monospace; letter-spacing: .12em; pointer-events: none; }
.stage-metrics { display: flex; justify-content: space-between; gap: 10px; padding: 10px 14px; border-top: 1px solid var(--line); color: var(--muted); font: 10px ui-monospace, SFMono-Regular, Menlo, monospace; letter-spacing: .08em; text-transform: uppercase; }
.stage-metrics b { color: var(--electric); font-weight: 600; }
.stage-canvas { display: block; width: 100%; height: 380px; }
.voice-legend { display: grid; grid-template-columns: repeat(4, 1fr); gap: 8px; padding: 14px; }
.voice-chip { border: 1px solid var(--line); border-radius: 6px; padding: 10px; color: var(--muted); background: rgba(255,255,255,.03); cursor: pointer; text-align: left; transition: border-color .2s ease, color .2s ease, transform .2s ease; }
.voice-chip:hover, .voice-chip.active { color: var(--ink); border-color: var(--voice-color, var(--mint)); transform: translateY(-2px); }
.voice-chip b { display: block; color: var(--voice-color, var(--mint)); font-size: 18px; }
.voice-chip small { display: block; margin-top: 3px; font-size: 11px; }

.site-main { padding-bottom: 80px; }
.section { padding: 86px 0; border-top: 1px solid var(--line); }
.section-heading { display: flex; align-items: end; justify-content: space-between; gap: 24px; margin-bottom: 30px; }
.section-heading h2 { margin-bottom: 0; font-size: 42px; line-height: 1.1; }
.section-heading p { max-width: 560px; margin-bottom: 0; color: var(--muted); }
.feature-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 12px; }
.feature { min-height: 220px; padding: 22px; border: 1px solid var(--line); border-radius: 6px; background: rgba(255,255,255,.035); transition: transform .25s ease, background .25s ease, border-color .25s ease; }
.feature { position: relative; overflow: hidden; }
.feature::after { content: "↗"; position: absolute; top: 17px; right: 18px; color: var(--line-strong); font: 16px ui-monospace, SFMono-Regular, Menlo, monospace; transition: color .2s ease, transform .2s ease; }
.feature:hover { transform: translateY(-5px); border-color: var(--line-strong); background: rgba(154,243,208,.07); }
.feature:hover::after { color: var(--mint); transform: translate(2px, -2px); }
.feature-index { color: var(--coral); font-family: ui-monospace, SFMono-Regular, Menlo, monospace; font-size: 12px; }
.feature h3 { margin: 28px 0 9px; font-size: 22px; }
.feature p { margin-bottom: 0; color: var(--muted); }
.practice-loop { display: grid; grid-template-columns: .7fr 1.3fr; gap: 32px; align-items: start; }
.loop-nav { position: sticky; top: 96px; display: grid; gap: 8px; }
.loop-step { display: grid; grid-template-columns: 36px 1fr; gap: 12px; padding: 14px; color: var(--muted); text-align: left; border: 1px solid var(--line); border-radius: 6px; background: transparent; cursor: pointer; }
.loop-step strong { display: block; color: inherit; }
.loop-step span { display: block; font-size: 12px; }
.loop-step.active { color: var(--ink); border-color: var(--mint); background: rgba(154,243,208,.08); }
.loop-number { display: grid; place-items: center; width: 28px; height: 28px; border: 1px solid currentColor; border-radius: 50%; color: var(--mint); font-size: 12px; }
.loop-display { min-height: 340px; padding: 28px; border: 1px solid var(--line); border-radius: 8px; background: var(--panel); }
.loop-display h3 { margin-bottom: 10px; font-size: 30px; }
.loop-display p { color: var(--muted); max-width: 620px; }
.signal-bars { display: flex; align-items: end; gap: 6px; height: 120px; margin-top: 30px; }
.signal-bars i { display: block; flex: 1; min-width: 7px; height: 30%; border-radius: 3px 3px 0 0; background: var(--cyan); animation: signal 1.8s ease-in-out infinite alternate; }
.signal-bars i:nth-child(2n) { background: var(--mint); animation-delay: .25s; }
.signal-bars i:nth-child(3n) { background: var(--coral); animation-delay: .5s; }
@keyframes signal { to { height: 88%; } }
.quote-band { display: grid; grid-template-columns: 1.15fr .85fr; gap: 24px; align-items: center; padding: 32px; border: 1px solid var(--line); border-radius: 8px; background: #0d2935; }
.quote-band h2 { margin-bottom: 12px; font-size: 34px; }
.quote-band p { margin-bottom: 0; color: var(--muted); }
.about-grid { display: grid; grid-template-columns: 1.1fr .9fr; gap: 12px; }
.about-card, .contact-card { padding: 28px; border: 1px solid var(--line); border-radius: 6px; background: rgba(255,255,255,.035); }
.about-card p, .contact-card p { color: var(--muted); }
.contact-card a { color: var(--mint); }
.contact-list { display: grid; gap: 14px; margin-top: 22px; }
.contact-item { padding-top: 14px; border-top: 1px solid var(--line); }

.page-hero { padding: 64px 0 44px; }
.page-hero h1 { max-width: 900px; margin: 12px 0 18px; font-size: 64px; }
.page-hero .lead { max-width: 760px; color: var(--muted); font-size: 19px; }
.guide-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 12px; }
.guide-card { padding: 24px; border: 1px solid var(--line); border-radius: 6px; background: rgba(255,255,255,.035); }
.guide-card h2 { margin-bottom: 10px; font-size: 25px; }
.guide-card p, .guide-card li { color: var(--muted); }
.guide-card ul { margin: 12px 0 0; padding-left: 20px; }
.practice-console { display: grid; grid-template-columns: 1.2fr .8fr; gap: 12px; padding: 14px; border: 1px solid var(--line); border-radius: 8px; background: var(--panel); }
.console-screen { min-height: 280px; padding: 24px; border: 1px solid var(--line); border-radius: 6px; background: #081720; }
.console-screen h2 { margin-bottom: 8px; }
.console-screen p { color: var(--muted); }
.console-lines { display: grid; gap: 12px; margin-top: 30px; }
.console-lines i { display: block; height: 2px; background: rgba(244,247,242,.34); }
.console-controls { display: grid; align-content: start; gap: 10px; padding: 12px; }
.console-controls button { border: 1px solid var(--line); border-radius: 6px; padding: 12px; color: var(--muted); background: transparent; cursor: pointer; text-align: left; }
.console-controls button.active, .console-controls button:hover { color: var(--ink); border-color: var(--mint); background: rgba(154,243,208,.08); }
details { border-top: 1px solid var(--line); padding: 18px 0; }
summary { cursor: pointer; font-weight: 800; font-size: 19px; }
details p { max-width: 780px; margin: 10px 0 0; color: var(--muted); }
.timeline { position: relative; display: grid; gap: 12px; max-width: 980px; }
.timeline::before { content: ""; position: absolute; left: 20px; top: 16px; bottom: 16px; width: 1px; background: var(--line-strong); }
.timeline-entry { position: relative; display: grid; grid-template-columns: 42px 1fr; gap: 14px; }
.timeline-dot { position: relative; z-index: 1; display: grid; place-items: center; width: 40px; height: 40px; border: 1px solid var(--mint); border-radius: 50%; color: var(--mint); background: var(--night); font-family: ui-monospace, SFMono-Regular, Menlo, monospace; font-size: 11px; }
.timeline-card { padding: 22px; border: 1px solid var(--line); border-radius: 6px; background: rgba(255,255,255,.035); }
.timeline-card h2 { margin: 8px 0; font-size: 25px; }
.timeline-card ul { margin: 0; padding-left: 20px; color: var(--muted); }
.timeline-meta { display: flex; flex-wrap: wrap; gap: 10px; color: var(--muted); font-size: 13px; }
.tag { color: var(--coral); font-weight: 850; }
.filters { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 24px; }
.filter { border: 1px solid var(--line); border-radius: 6px; padding: 8px 13px; color: var(--muted); background: transparent; cursor: pointer; }
.filter.active, .filter:hover { color: var(--night); border-color: var(--mint); background: var(--mint); }
.demo-layout { display: grid; grid-template-columns: minmax(0, 1.3fr) minmax(280px, .7fr); gap: 12px; align-items: start; }
.demo-panel, .demo-card { border: 1px solid var(--line); border-radius: 8px; background: var(--panel); padding: 14px; }
.demo-toolbar { display: flex; flex-wrap: wrap; gap: 8px; padding-bottom: 14px; border-bottom: 1px solid var(--line); }
.demo-toolbar .button { min-height: 40px; }
.demo-stage { margin-top: 14px; padding: 14px; border: 1px solid var(--line); border-radius: 6px; overflow: hidden; background: #081720; }
.demo-stage svg { display: block; width: 100%; height: auto; color: var(--ink); }
.demo-stage .staff-line { stroke: rgba(244,247,242,.34); stroke-width: 2; }
.demo-stage .note-head { fill: var(--ink); transition: fill .16s ease, transform .16s ease; }
.demo-stage .note-head.active { fill: var(--mint); }
.demo-stage .note-head.good { fill: #6ee7a2; }
.demo-stage .note-head.bad { fill: var(--coral); }
.demo-stage .note-label { fill: var(--muted); font-size: 12px; }
.demo-stage .feedback-tag { opacity: 0; transition: opacity .18s ease; }
.demo-stage .feedback-tag.visible { opacity: 1; }
.demo-progress { display: grid; gap: 8px; margin-top: 14px; }
.demo-progress-bar { height: 8px; overflow: hidden; border-radius: 999px; background: rgba(255,255,255,.12); }
.demo-progress-bar span { display: block; width: 0; height: 100%; background: var(--mint); transition: width .2s ease; }
.demo-lyric { color: var(--mint); font-size: 22px; font-weight: 850; }
.demo-side { display: grid; gap: 12px; }
.demo-readout { display: grid; gap: 8px; }
.demo-metric { display: grid; grid-template-columns: 1fr auto; gap: 12px; align-items: center; padding: 13px; border: 1px solid var(--line); border-radius: 6px; background: rgba(255,255,255,.035); }
.demo-metric strong { display: block; font-size: 14px; }
.demo-metric-value { color: var(--mint); font-family: ui-monospace, SFMono-Regular, Menlo, monospace; font-size: 13px; text-align: right; }
.demo-meter { height: 6px; margin-top: 8px; overflow: hidden; border-radius: 999px; background: rgba(255,255,255,.12); }
.demo-meter span { display: block; width: 0; height: 100%; background: var(--cyan); transition: width .12s ease, background .12s ease; }
.demo-verdict { min-height: 72px; padding: 16px; border: 1px solid var(--line); border-radius: 6px; background: rgba(255,255,255,.045); font-weight: 800; }
.demo-verdict.good { color: #6ee7a2; border-color: rgba(110,231,162,.48); }
.demo-verdict.bad { color: var(--coral); border-color: rgba(255,155,125,.48); }
.demo-verdict.waiting { color: var(--muted); }
.demo-steps { display: grid; grid-template-columns: repeat(3, 1fr); gap: 10px; margin-top: 12px; }
.demo-step { padding: 16px; border: 1px solid var(--line); border-radius: 6px; background: rgba(255,255,255,.035); }
.demo-step b { display: grid; place-items: center; width: 28px; height: 28px; margin-bottom: 12px; border: 1px solid var(--mint); border-radius: 50%; color: var(--mint); font-size: 12px; }
.demo-step p { margin: 6px 0 0; color: var(--muted); font-size: 14px; }
.composer-grid { display: grid; grid-template-columns: minmax(0, 1.2fr) minmax(240px, .8fr); gap: 12px; }
.composer-chips { display: flex; flex-wrap: wrap; gap: 7px; min-height: 42px; padding: 10px 0; }
.composer-chip { padding: 6px 9px; border: 1px solid var(--line); border-radius: 5px; color: var(--mint); background: rgba(255,255,255,.04); font: 12px ui-monospace, SFMono-Regular, Menlo, monospace; }
.composer-grid textarea { width: 100%; min-height: 190px; padding: 12px; border: 1px solid var(--line); border-radius: 6px; color: var(--ink); background: #081720; resize: vertical; font: 12px/1.5 ui-monospace, SFMono-Regular, Menlo, monospace; }
.demo-note { color: var(--muted); font-size: 13px; }
.site-footer { padding: 26px 0 42px; border-top: 1px solid var(--line); color: var(--muted); font-size: 14px; }
.site-footer a { color: var(--mint); }
.reveal { opacity: 0; transform: translateY(18px); transition: opacity .7s ease, transform .7s ease; }
.reveal.is-visible { opacity: 1; transform: none; }

@media (max-width: 880px) {
  .site-nav, .site-header, .site-main, .site-footer { width: min(100% - 28px, 720px); }
  .site-telemetry { width: min(100% - 28px, 720px); }
  .nav-menu { display: inline-flex; }
  .nav-links { display: none; position: absolute; top: 76px; right: 0; left: 0; padding: 12px; border: 1px solid var(--line); background: #0a1b25; }
  .nav-links.is-open { display: grid; }
  .nav-links a { display: block; }
  .hero-grid, .practice-loop, .quote-band, .about-grid, .practice-console { grid-template-columns: 1fr; }
  .demo-layout, .composer-grid { grid-template-columns: 1fr; }
  h1 { font-size: 54px; }
  .hero-stage { min-height: 420px; }
  .stage-canvas { height: 300px; }
  .loop-nav { position: static; }
  .feature-grid, .guide-grid { grid-template-columns: 1fr; }
  .demo-steps { grid-template-columns: 1fr; }
  .section-heading { display: block; }
  .section-heading p { margin-top: 12px; }
}
@media (max-width: 560px) {
  .site-nav, .site-header, .site-main, .site-footer { width: min(100% - 22px, 520px); }
  .site-telemetry { width: min(100% - 22px, 520px); font-size: 8px; }
  .site-telemetry > span:nth-child(2) { display: none; }
  .site-nav { padding: 15px 0; }
  .brand-sub { display: none; }
  .nav-actions { gap: 5px; }
  .language-switch button { padding: 5px 8px; }
  .site-header { padding: 48px 0 56px; }
  h1, .page-hero h1 { font-size: 42px; }
  .hero-copy .lead, .page-hero .lead { font-size: 17px; }
  .micro-stats { gap: 8px; }
  .micro-stats strong { font-size: 20px; }
  .micro-stats span { font-size: 11px; }
  .section { padding: 60px 0; }
  .section-heading h2 { font-size: 32px; }
  .stage-canvas { height: 230px; }
  .voice-legend { grid-template-columns: repeat(2, 1fr); }
}
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { scroll-behavior: auto !important; animation-duration: .01ms !important; animation-iteration-count: 1 !important; transition-duration: .01ms !important; }
  .reveal { opacity: 1; transform: none; }
  body::after, .telemetry-dot { animation: none; }
}