/* PC2Sonos — "one beat" identity.
   Layout: dark stage, huge condensed headlines paired with italic serif words,
   a hot signal gradient (amber > magenta > violet) used only on those words and the waveforms. */
:root {
  color-scheme: dark;
  --ink: #08070c;          /* page ground, violet-biased black */
  --ink-2: #110f18;        /* raised surfaces */
  --ink-3: #1b1824;        /* lines on raised surfaces */
  --bone: #f4efe7;         /* headline + body text */
  --dim: #a39fae;          /* secondary text */
  --faint: #6c6878;        /* labels, meta */
  --line: #25222f;
  --amber: #ffb23f;
  --magenta: #ff3d7f;
  --violet: #7b5cff;
  --signal: linear-gradient(100deg, var(--amber) 0%, var(--magenta) 52%, var(--violet) 100%);
  --on-amber: #1a1206;

  --f-display: "Anton", "Impact", "Haettenschweiler", "Arial Narrow Bold", sans-serif;
  --f-serif: "Instrument Serif", "Iowan Old Style", "Palatino", Georgia, serif;
  --f-body: "Manrope", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  --f-mono: "JetBrains Mono", ui-monospace, "SFMono-Regular", Consolas, monospace;

  --gutter: clamp(16px, 4vw, 64px);
  --max: 1320px;
  --read: 720px;
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; overflow-x: clip; }
body {
  margin: 0;
  background: var(--ink);
  color: var(--bone);
  font: 400 17px/1.65 var(--f-body);
  overflow-x: clip;
}
/* film grain over everything */
body::before {
  content: ""; position: fixed; inset: -50%; z-index: 100; pointer-events: none; opacity: .07;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='160' height='160'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.9' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
  animation: grain 1.2s steps(6) infinite;
}
@keyframes grain { 0%{transform:translate(0,0)} 20%{transform:translate(-3%,2%)} 40%{transform:translate(2%,-3%)} 60%{transform:translate(-2%,-1%)} 80%{transform:translate(3%,3%)} 100%{transform:translate(0,0)} }

a { color: var(--bone); text-decoration-color: var(--magenta); text-underline-offset: 3px; }
a:hover { color: var(--amber); }
:focus-visible { outline: 2px solid var(--amber); outline-offset: 3px; border-radius: 4px; }
::selection { background: var(--magenta); color: #fff; }

.wrap { max-width: var(--max); margin: 0 auto; padding-inline: var(--gutter); }

/* ---------- type ---------- */
h1, h2, .display {
  font-family: var(--f-display); font-weight: 400; text-transform: uppercase;
  letter-spacing: -0.005em; line-height: .92; text-wrap: balance; margin: 0;
}
h1 { font-size: clamp(44px, 8vw, 112px); }
h2 { font-size: clamp(36px, 5.6vw, 80px); margin: 96px 0 20px; }
h3 { font: 700 20px/1.3 var(--f-body); margin: 36px 0 8px; letter-spacing: -0.01em; text-wrap: balance; }
em.s, .s {
  font-family: var(--f-serif); font-style: italic; font-weight: 400; text-transform: none;
  letter-spacing: -0.01em; background: var(--signal); -webkit-background-clip: text; background-clip: text;
  color: transparent; padding-right: .08em;
}
.eyebrow {
  display: inline-flex; align-items: center; gap: 12px;
  font: 600 12px/1 var(--f-mono); letter-spacing: .22em; text-transform: uppercase; color: var(--amber);
}
.eyebrow::before { content: ""; width: 28px; height: 1px; background: currentColor; }
p.lead { font-size: clamp(18px, 1.6vw, 21px); color: var(--dim); margin: 24px 0 32px; max-width: 40em; }
p.lead strong { color: var(--bone); }
code { font: 500 .88em var(--f-mono); background: var(--ink-3); color: var(--amber); padding: 2px 6px; border-radius: 4px; }
strong { color: var(--bone); font-weight: 700; }

/* ---------- buttons ---------- */
.buttons { display: flex; gap: 12px; flex-wrap: wrap; align-items: center; margin: 20px 0; }
.btn {
  position: relative; display: inline-flex; align-items: center; gap: 10px;
  background: var(--amber); color: var(--on-amber); border: 1px solid var(--amber);
  padding: 15px 26px; border-radius: 999px; font: 700 15px/1 var(--f-body);
  text-decoration: none; transition: transform .2s, box-shadow .3s, background .2s;
}
.btn:hover { color: var(--on-amber); transform: translateY(-2px); box-shadow: 0 10px 40px -8px rgba(255,120,80,.6); background: #ffc266; }
.btn.secondary { background: transparent; color: var(--bone); border-color: #3a3645; }
.btn.secondary:hover { border-color: var(--bone); box-shadow: none; }
.btn.sm { padding: 11px 18px; font-size: 14px; }
.btn .arr { transition: transform .2s; }
.btn:hover .arr { transform: translateX(4px); }
.note { color: var(--faint); font-size: 14px; margin-top: 8px; }
.note a { color: var(--dim); }

/* ---------- header ---------- */
header.site {
  position: sticky; top: env(safe-area-inset-top, 0px); z-index: 50;
  background: rgba(8,7,12,.72); backdrop-filter: blur(14px) saturate(1.4); -webkit-backdrop-filter: blur(14px) saturate(1.4);
  border-bottom: 1px solid rgba(255,255,255,.06);
}
header.site .wrap { display: flex; align-items: center; gap: 24px; padding-block: 14px; }
.brand {
  display: inline-flex; align-items: center; gap: 10px; flex-shrink: 0;
  font: 400 24px/1 var(--f-display); letter-spacing: .01em; text-transform: uppercase; color: var(--bone); text-decoration: none;
}
.brand:hover { color: var(--bone); }
.brand-mark { display: inline-flex; align-items: flex-end; gap: 2px; height: 20px; }
.brand-mark i { width: 3px; border-radius: 2px; background: var(--signal); background-size: 200% 100%; animation: eq 1s ease-in-out infinite alternate; }
.brand-mark i:nth-child(1) { height: 40%; animation-delay: -.2s; }
.brand-mark i:nth-child(2) { height: 100%; animation-delay: -.6s; }
.brand-mark i:nth-child(3) { height: 65%; animation-delay: -.4s; }
.brand-mark i:nth-child(4) { height: 85%; animation-delay: -.8s; }
@keyframes eq { from { transform: scaleY(.35); } to { transform: scaleY(1); } }
.brand-mark i { transform-origin: bottom; }
nav { display: flex; gap: 4px 26px; flex-wrap: wrap; margin-left: auto; }
nav a { color: var(--dim); text-decoration: none; font: 600 14px/1 var(--f-body); padding-block: 6px; position: relative; }
nav a::after { content: ""; position: absolute; left: 0; right: 0; bottom: 0; height: 2px; background: var(--signal); transform: scaleX(0); transform-origin: left; transition: transform .25s; }
nav a:hover, nav a[aria-current] { color: var(--bone); }
nav a:hover::after, nav a[aria-current]::after { transform: scaleX(1); }
@media (max-width: 860px) {
  header.site .wrap { flex-wrap: wrap; gap: 10px 16px; }
  header.site .btn { margin-left: auto; }
  nav { order: 3; width: 100%; margin-left: 0; flex-wrap: nowrap; overflow-x: auto; gap: 22px; scrollbar-width: none; }
  nav::-webkit-scrollbar { display: none; }
  nav a { white-space: nowrap; }
}

/* ---------- inner pages ---------- */
main { padding-block: 56px 40px; }
.page-head { padding-block: 40px 8px; position: relative; }
.page-head h1 { max-width: 16ch; }
.page-head::after {
  content: ""; position: absolute; right: -10%; top: -120px; width: 620px; height: 620px; max-width: 80vw; z-index: -1;
  background: radial-gradient(closest-side, rgba(255,61,127,.22), rgba(123,92,255,.08) 55%, transparent); filter: blur(10px);
}
.article { max-width: var(--read); }
.article h2 { font-size: clamp(32px, 4.4vw, 56px); margin-top: 72px; }
.article p, .article li { color: #cfcad6; }
.article > p { max-width: 65ch; }
.crumbs { font: 500 12px/1.4 var(--f-mono); letter-spacing: .14em; text-transform: uppercase; color: var(--faint); margin: 0 0 24px; }
.crumbs a { color: var(--dim); text-decoration: none; }
.crumbs a:hover { color: var(--amber); }

ol.steps { list-style: none; counter-reset: s; padding: 0; margin: 24px 0; display: grid; gap: 14px; }
ol.steps li { counter-increment: s; position: relative; padding: 18px 20px 18px 72px; background: var(--ink-2); border: 1px solid var(--line); border-radius: 14px; }
ol.steps li::before {
  content: counter(s, decimal-leading-zero); position: absolute; left: 20px; top: 14px;
  font: 400 30px/1 var(--f-display); background: var(--signal); -webkit-background-clip: text; background-clip: text; color: transparent;
}

.grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(min(100%, 300px), 1fr)); gap: 14px; margin-top: 28px; }
.card { position: relative; background: var(--ink-2); border: 1px solid var(--line); border-radius: 18px; padding: 24px; min-width: 0; overflow: hidden; }
.card h3 { margin: 0 0 8px; font-size: 19px; }
.card p { margin: 0; color: var(--dim); font-size: 15px; }
a.card.link { display: block; text-decoration: none; color: var(--bone); transition: transform .25s, border-color .25s; }
a.card.link::after { content: "\2197"; position: absolute; top: 20px; right: 22px; font-size: 20px; color: var(--faint); transition: color .2s, transform .25s; }
a.card.link h3 { padding-right: 28px; }
a.card.link:hover { transform: translateY(-4px); border-color: var(--magenta); }
a.card.link:hover::after { color: var(--amber); transform: translate(3px,-3px); }

details { border-bottom: 1px solid var(--line); padding: 22px 0; }
details summary { cursor: pointer; list-style: none; display: flex; justify-content: space-between; gap: 20px; font: 700 clamp(17px, 1.6vw, 20px)/1.35 var(--f-body); }
details summary::-webkit-details-marker { display: none; }
details summary::after { content: "+"; font: 400 30px/.8 var(--f-display); color: var(--amber); transition: transform .3s; flex-shrink: 0; }
details[open] summary::after { transform: rotate(45deg); color: var(--magenta); }
details p { margin: 12px 0 0; color: var(--dim); max-width: 62ch; }

.table { overflow-x: auto; margin: 24px 0; border: 1px solid var(--line); border-radius: 14px; }
table { border-collapse: collapse; width: 100%; font-size: 15px; min-width: 560px; }
th, td { text-align: left; padding: 14px 16px; border-bottom: 1px solid var(--line); vertical-align: top; }
tr:last-child td { border-bottom: 0; }
th { font: 600 12px/1.3 var(--f-mono); letter-spacing: .12em; text-transform: uppercase; color: var(--amber); background: var(--ink-2); }
td { color: #cfcad6; }

/* ---------- footer ---------- */
footer.site { margin-top: 120px; border-top: 1px solid var(--line); overflow: hidden; }
.foot-cta { padding-block: 80px 40px; display: grid; gap: 28px; }
.foot-cta .display { font-size: clamp(56px, 12vw, 190px); }
.foot-links { display: flex; flex-wrap: wrap; gap: 10px 28px; padding-block: 28px; border-top: 1px solid var(--line); font-size: 14px; }
.foot-links a { color: var(--dim); text-decoration: none; }
.foot-links a:hover { color: var(--amber); }
.foot-legal { color: var(--faint); font-size: 13px; padding-bottom: 36px; }
.foot-word {
  font: 400 clamp(80px, 24vw, 380px)/.78 var(--f-display); text-transform: uppercase; letter-spacing: -.02em;
  color: transparent; -webkit-text-stroke: 1px #2c2837; white-space: nowrap; text-align: center; margin-bottom: -.12em; user-select: none;
}

/* ================= HOME ================= */
.hero { position: relative; min-height: min(880px, 100svh); display: flex; flex-direction: column; justify-content: flex-end; padding-block: 110px 0; isolation: isolate; }
.hero-bg { position: absolute; inset: 0; z-index: -1; overflow: hidden; }
.hero-bg canvas { width: 100%; height: 100%; display: block; }
.hero-bg::after { content: ""; position: absolute; inset: 0; background: linear-gradient(180deg, rgba(8,7,12,.2) 0%, rgba(8,7,12,.35) 45%, var(--ink) 100%); }
.glow { position: absolute; border-radius: 50%; filter: blur(80px); opacity: .5; pointer-events: none; }
.glow.a { width: 520px; height: 520px; background: var(--magenta); left: -140px; top: 10%; opacity: .28; }
.glow.b { width: 620px; height: 620px; background: var(--violet); right: -200px; top: -120px; opacity: .3; }
.glow.c { width: 380px; height: 380px; background: var(--amber); right: 20%; bottom: 10%; opacity: .16; }

.hero h1 { font-size: clamp(60px, 13.4vw, 216px); line-height: .84; }
.hero h1 .row { display: flex; flex-wrap: wrap; align-items: baseline; column-gap: .22em; }
.hero h1 .s { font-size: .9em; line-height: .9; }
.hero-foot { display: grid; grid-template-columns: minmax(0, 1fr) auto; gap: 28px 40px; align-items: end; margin-top: 36px; }
.hero-foot p.lead { margin: 0; max-width: 34em; }
.hero-cta { display: flex; flex-direction: column; align-items: flex-end; gap: 10px; }
.hero-cta .note { margin: 0; text-align: right; }
@media (max-width: 820px) { .hero-foot { grid-template-columns: 1fr; } .hero-cta { align-items: flex-start; } .hero-cta .note { text-align: left; } }

.seal { position: absolute; right: var(--gutter); top: 120px; width: 150px; height: 150px; }
.seal svg { width: 100%; height: 100%; animation: spin 18s linear infinite; }
.seal text { font: 700 10.5px var(--f-mono); letter-spacing: .28em; fill: var(--bone); }
.seal .core { position: absolute; inset: 34px; border-radius: 50%; background: var(--signal); display: grid; place-items: center; text-align: center; color: #fff; box-shadow: 0 0 60px -6px rgba(255,61,127,.7); }
.seal .core b { display: block; font: 400 36px/.9 var(--f-display); }
.seal .core small { font: 700 9px/1 var(--f-mono); letter-spacing: .18em; }
@keyframes spin { to { transform: rotate(360deg); } }
@media (max-width: 720px) { .seal { width: 108px; height: 108px; top: 96px; } .seal .core { inset: 25px; } .seal .core b { font-size: 26px; } .seal text { font-size: 13px; } }

.hero-meta { display: flex; justify-content: space-between; gap: 16px; flex-wrap: wrap; padding-block: 22px; margin-top: 40px; border-top: 1px solid rgba(255,255,255,.08); font: 600 11px/1 var(--f-mono); letter-spacing: .24em; text-transform: uppercase; color: var(--faint); }

.sound {
  display: inline-flex; align-items: center; gap: 10px; cursor: pointer;
  background: rgba(255,255,255,.04); color: var(--bone); border: 1px solid #3a3645; border-radius: 999px;
  padding: 10px 16px; font: 700 12px/1 var(--f-mono); letter-spacing: .18em; text-transform: uppercase;
}
.sound:hover { border-color: var(--bone); }
.sound .bars { display: inline-flex; gap: 2px; align-items: flex-end; height: 12px; }
.sound .bars i { width: 2px; height: 3px; background: var(--amber); border-radius: 1px; transition: height .2s; }
.sound[aria-pressed="true"] .bars i { animation: eq .5s ease-in-out infinite alternate; height: 12px; transform-origin: bottom; }
.sound[aria-pressed="true"] .bars i:nth-child(2) { animation-delay: -.2s; }
.sound[aria-pressed="true"] .bars i:nth-child(3) { animation-delay: -.35s; }
.sound[aria-pressed="true"] .bars i:nth-child(4) { animation-delay: -.1s; }

/* marquee */
.marquee { border-block: 1px solid var(--line); overflow: hidden; padding-block: 18px; background: var(--ink-2); transform: rotate(-1.4deg); margin: 40px -20px 0; }
.marquee .track { display: flex; width: max-content; animation: slide 28s linear infinite; }
.marquee span { font: 400 clamp(28px, 4vw, 52px)/1 var(--f-display); text-transform: uppercase; white-space: nowrap; padding-right: 40px; display: inline-flex; align-items: center; gap: 40px; }
.marquee span .s { font-size: 1.05em; }
.marquee span::after { content: "\2726"; color: var(--magenta); font-size: .6em; }
@keyframes slide { to { transform: translateX(-50%); } }

/* scroll-lit statement */
.statement { padding-block: 140px 60px; }
.statement p { font: 400 clamp(30px, 4.6vw, 68px)/1.08 var(--f-display); text-transform: uppercase; margin: 0; max-width: 20ch; text-wrap: balance; }
.statement p .w { opacity: .22; transition: opacity .35s; }
.statement p .w.on { opacity: 1; }
.statement p .s { text-transform: none; }

/* echo lab */
.lab { position: relative; margin-top: 60px; border: 1px solid var(--line); border-radius: 28px; background: radial-gradient(120% 90% at 100% 0%, rgba(123,92,255,.16), transparent 60%), var(--ink-2); padding: clamp(22px, 4vw, 48px); overflow: hidden; }
.lab-head { display: grid; grid-template-columns: minmax(0, 1fr) auto; gap: 24px; align-items: end; }
.lab-head h2 { margin: 12px 0 0; }
.lab-head p { color: var(--dim); max-width: 44ch; margin: 16px 0 0; }
@media (max-width: 820px) { .lab-head { grid-template-columns: 1fr; } }
.readout { text-align: right; font-family: var(--f-mono); }
.readout .num { font: 400 clamp(56px, 8vw, 110px)/.9 var(--f-display); font-variant-numeric: tabular-nums; display: block; transition: color .4s; }
.readout .unit { font-size: 12px; letter-spacing: .2em; color: var(--faint); text-transform: uppercase; }
.lab.synced .readout .num { background: var(--signal); -webkit-background-clip: text; background-clip: text; color: transparent; }
@media (max-width: 820px) { .readout { text-align: left; } }
.lanes { margin-top: 36px; display: grid; gap: 10px; }
.lane { display: grid; grid-template-columns: 110px minmax(0, 1fr); gap: 16px; align-items: center; }
.lane label { font: 700 11px/1.3 var(--f-mono); letter-spacing: .18em; text-transform: uppercase; color: var(--dim); }
.lane canvas { width: 100%; height: 86px; display: block; border-radius: 12px; background: rgba(0,0,0,.35); border: 1px solid var(--line); }
@media (max-width: 560px) { .lane { grid-template-columns: 1fr; gap: 6px; } .lane canvas { height: 64px; } }
.lab-controls { display: flex; flex-wrap: wrap; gap: 14px; align-items: center; margin-top: 28px; }
.switch { display: inline-flex; align-items: center; gap: 14px; cursor: pointer; background: none; border: 0; color: var(--bone); padding: 0; font: 700 15px var(--f-body); }
.switch .knob { width: 74px; height: 40px; border-radius: 99px; background: #2a2635; position: relative; transition: background .35s; border: 1px solid #3a3645; }
.switch .knob::after { content: ""; position: absolute; left: 4px; top: 4px; width: 30px; height: 30px; border-radius: 50%; background: var(--bone); transition: transform .35s cubic-bezier(.5,1.6,.4,1); }
.switch[aria-checked="true"] .knob { background: var(--signal); border-color: transparent; }
.switch[aria-checked="true"] .knob::after { transform: translateX(34px); }
.lab .fine { color: var(--faint); font-size: 13px; margin: 18px 0 0; }

/* features */
.features { margin-top: 20px; border-top: 1px solid var(--line); }
.feat { position: relative; display: grid; grid-template-columns: 150px minmax(0, 1.1fr) minmax(0, 1fr); gap: 12px 32px; align-items: baseline; padding-block: 30px; border-bottom: 1px solid var(--line); isolation: isolate; }
.feat::before { content: ""; position: absolute; inset: 0 calc(-1 * var(--gutter)); z-index: -1; background: linear-gradient(90deg, rgba(255,178,63,.10), rgba(255,61,127,.10), rgba(123,92,255,.06)); opacity: 0; transition: opacity .35s; }
.feat:hover::before { opacity: 1; }
.feat .tag { font: 600 11px/1.4 var(--f-mono); letter-spacing: .2em; text-transform: uppercase; color: var(--amber); }
.feat h3 { margin: 0; font: 400 clamp(32px, 4vw, 58px)/.95 var(--f-display); text-transform: uppercase; transition: transform .35s; }
.feat:hover h3 { transform: translateX(10px); }
.feat p { margin: 0; color: var(--dim); }
@media (max-width: 820px) { .feat { grid-template-columns: 1fr; } }

/* stats */
.stats { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); margin-top: 100px; border-block: 1px solid var(--line); }
.stat { padding: 34px 24px 30px; border-left: 1px solid var(--line); min-width: 0; }
.stat:first-child { border-left: 0; padding-left: 0; }
.stat b { display: block; font: 400 clamp(56px, 7vw, 108px)/.88 var(--f-display); font-variant-numeric: tabular-nums; }
.stat b .s { font-size: .6em; }
.stat span { display: block; margin-top: 12px; font: 600 11px/1.5 var(--f-mono); letter-spacing: .16em; text-transform: uppercase; color: var(--faint); }
@media (max-width: 820px) { .stats { grid-template-columns: repeat(2, minmax(0, 1fr)); } .stat:nth-child(3) { border-left: 0; padding-left: 0; } .stat:nth-child(n+3) { border-top: 1px solid var(--line); } }

/* how it works */
.how { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 14px; margin-top: 28px; }
.how li { list-style: none; background: var(--ink-2); border: 1px solid var(--line); border-radius: 22px; padding: 28px; min-width: 0; }
.how { padding: 0; }
.how .n { font: 400 88px/.8 var(--f-display); background: var(--signal); -webkit-background-clip: text; background-clip: text; color: transparent; display: block; margin-bottom: 26px; }
.how h3 { margin: 0 0 8px; font-size: 21px; }
.how p { margin: 0; color: var(--dim); font-size: 15px; }
@media (max-width: 820px) { .how { grid-template-columns: 1fr; } }

.split { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1.4fr); gap: 48px; align-items: start; }
.split h2 { margin-top: 0; }
@media (max-width: 900px) { .split { grid-template-columns: 1fr; gap: 12px; } }
section.block { padding-top: 110px; }
section.block > .wrap > h2:first-child, section.block h2.top { margin-top: 12px; }

.reveal { transition: transform .9s cubic-bezier(.2,.7,.2,1), opacity .9s; }
.js .reveal.pre { transform: translateY(28px); opacity: .001; }

/* inner-page atmosphere */
main { position: relative; isolation: isolate; }
main::before {
  content: ""; position: absolute; right: -8%; top: -160px; width: 680px; height: 680px; max-width: 90vw; z-index: -1; pointer-events: none;
  background: radial-gradient(closest-side, rgba(255,61,127,.20), rgba(123,92,255,.09) 55%, transparent);
}
.article h1 { font-size: clamp(44px, 6.4vw, 92px); max-width: 15ch; }
.article h1 + p.lead { margin-top: 28px; }

/* hero sync toggle */
.hero-mix { grid-column: 1 / -1; display: flex; flex-wrap: wrap; align-items: center; gap: 12px 20px; }
.hero-mix .hint { color: var(--dim); font-size: 14px; }
.hero-mix .hint.gone { display: none; }
.switch .sync-lbl { min-width: 7.5em; text-align: left; }
.switch[aria-checked="false"] .sync-lbl { color: var(--magenta); }
section.block.steps-top { padding-top: 48px; }
.steps-top .how { margin-top: 20px; }