:root{--bg:#000;--fg:#f5f5f7;--sec:rgba(245,245,247,.72);--dim:rgba(245,245,247,.5);--line:rgba(255,255,255,.14);--red:#ff5a6e;--w:min(100% - 2.5rem,980px);--hh:52px}
*{box-sizing:border-box;margin:0;padding:0}
html{background:#000;overflow-x:hidden;scroll-behavior:smooth}
body{background:#000;color:var(--fg);font-family:-apple-system,BlinkMacSystemFont,"SF Pro Text","Helvetica Neue",Inter,"Segoe UI",Roboto,Arial,sans-serif;font-size:15px;line-height:1.55;-webkit-font-smoothing:antialiased;overflow-x:hidden}
@media(min-width:760px){body{font-size:16px}}
a{color:var(--fg)}a:focus-visible,button:focus-visible,summary:focus-visible{outline:2px solid var(--fg);outline-offset:3px}
.skip{position:absolute;left:-999px;z-index:100}.skip:focus{left:1rem;top:.4rem;min-height:44px;display:inline-flex;align-items:center;padding:0 1rem;background:#fff;color:#000}
/* background: thin grid + one red playhead */
.grid{position:fixed;inset:0;z-index:0;pointer-events:none;background-image:linear-gradient(rgba(255,255,255,.045) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.045) 1px,transparent 1px);background-size:48px 48px;overflow:hidden}
@keyframes sweep{from{transform:translateX(-2px)}to{transform:translateX(100vw)}}
main,.ftr,.hdr{position:relative;z-index:1}
/* header */
.hdr{position:sticky;top:0;z-index:20;background:#000;border-bottom:1px solid var(--line)}
.hin{width:var(--w);margin:0 auto;height:var(--hh);display:flex;align-items:center;justify-content:space-between}
.brand{display:inline-flex;align-items:center;gap:.5rem;min-height:44px;font-weight:600;font-size:1rem;letter-spacing:-.01em;text-decoration:none}
.mark{width:22px;height:14px}.mark rect,.logo rect{fill:var(--fg)}
.menu{width:44px;height:44px;display:inline-flex;flex-direction:column;justify-content:center;gap:6px;padding:0 11px;margin-right:-11px;background:none;border:0;cursor:pointer}
.menu span{height:1px;background:var(--fg);transition:transform .2s}
.menu[aria-expanded=true] span:first-child{transform:translateY(3.5px) rotate(45deg)}.menu[aria-expanded=true] span:last-child{transform:translateY(-3.5px) rotate(-45deg)}
#nav{display:none;position:fixed;top:var(--hh);left:0;right:0;bottom:0;background:#000;flex-direction:column;padding:1rem 1.25rem}
#nav.open{display:flex}
#nav a{display:flex;align-items:center;min-height:52px;border-bottom:1px solid var(--line);text-decoration:none;font-size:1.25rem;font-weight:400;color:var(--fg)}
@media(min-width:820px){.menu{display:none}#nav{display:flex;position:static;flex-direction:row;padding:0;background:none;gap:.25rem}
 #nav a{min-height:44px;border:0;padding:0 .8rem;font-size:.8rem;font-weight:300;color:var(--sec)}#nav a:hover,#nav a[aria-current]{color:var(--fg)}}
body.nav-open{overflow:hidden}
/* layout */
.w{width:var(--w);margin:0 auto}
.hero{min-height:calc(100svh - var(--hh));display:flex;align-items:center;text-align:center;padding:3rem 0}
.hero .w{display:flex;flex-direction:column;align-items:center}
.logo{width:64px;height:auto;margin-bottom:1.5rem}
h1{font-size:clamp(2.2rem,6.5vw,3.8rem);font-weight:600;letter-spacing:-.03em;line-height:1.08}
.lead{font-size:clamp(1.1rem,2.6vw,1.5rem);font-weight:500;margin-top:.5rem}
.sub{color:var(--sec);max-width:34rem;margin-top:.75rem;font-size:clamp(.95rem,1.6vw,1.06rem)}
.hero .sub{margin-left:auto;margin-right:auto}
.soon{margin-top:2rem;color:var(--sec);font-size:.9rem;display:flex;align-items:center;gap:.6rem;flex-wrap:wrap;justify-content:center}
.tag{font-size:.65rem;font-weight:600;letter-spacing:.08em;text-transform:uppercase;color:var(--fg);border:1px solid var(--line);padding:.15rem .45rem;border-radius:3px}
.phead{padding:clamp(3.5rem,10vw,6.5rem) 0 2rem}
.sec{padding:clamp(3rem,8vw,5rem) 0;border-top:1px solid var(--line)}
.phead+.sec{border-top:0;padding-top:1rem}
.label{font-size:.72rem;font-weight:500;letter-spacing:.1em;text-transform:uppercase;color:var(--dim);margin-bottom:.75rem}
h2{font-size:clamp(1.5rem,3.6vw,2.2rem);font-weight:600;letter-spacing:-.02em;line-height:1.15}
h3{font-size:1rem;font-weight:600}
.intro{color:var(--sec);max-width:40rem;margin-top:1rem;font-size:clamp(.95rem,1.6vw,1.06rem)}
.lnk{display:inline-flex;align-items:center;min-height:44px;margin-top:.5rem;text-decoration:none;color:var(--fg);border-bottom:1px solid var(--line)}.lnk::after{content:" →";white-space:pre}.lnk:hover{border-color:var(--fg)}
/* rows */
.rows{margin-top:2rem;border-top:1px solid var(--line)}
.rows>div{display:grid;grid-template-columns:1fr;gap:.2rem;padding:1rem 0;border-bottom:1px solid var(--line)}
.rows dt{font-weight:500;font-size:.92rem}.rows dd{color:var(--sec)}
@media(min-width:680px){.rows>div{grid-template-columns:13rem 1fr;gap:2rem}}
/* steps */
.steps{list-style:none;counter-reset:s;margin-top:2rem;border-top:1px solid var(--line)}
.steps li{counter-increment:s;display:grid;grid-template-columns:2.5rem 1fr;column-gap:1rem;padding:1.1rem 0;border-bottom:1px solid var(--line)}
.steps li::before{content:counter(s);grid-row:span 2;font-weight:300;font-size:1.6rem;line-height:1.1;color:var(--dim);font-variant-numeric:tabular-nums}
.steps p{color:var(--sec);margin-top:.2rem}
@media(min-width:900px){.steps li{grid-template-columns:3.5rem 15rem 1fr}.steps li::before{grid-row:auto}.steps p{margin:0}}
/* prose */
.prose{max-width:40rem}.prose p{color:var(--sec);font-size:clamp(1rem,1.7vw,1.12rem);line-height:1.7}.prose p+p{margin-top:1.15rem}
.prose .note{margin-top:2.5rem;padding-top:1rem;border-top:1px solid var(--line);font-size:.85rem;color:var(--dim)}
/* faq */
.faq{margin-top:2rem;border-top:1px solid var(--line)}.faq details{border-bottom:1px solid var(--line)}
.faq summary{cursor:pointer;list-style:none;min-height:52px;display:flex;align-items:center;justify-content:space-between;gap:1rem;font-weight:500}
.faq summary::-webkit-details-marker{display:none}.faq summary::after{content:"+";font-weight:300;font-size:1.2rem;color:var(--dim)}.faq details[open] summary::after{content:"−"}
.faq p{color:var(--sec);padding:0 0 1.1rem;max-width:42rem}
/* legal */
.doc{padding:0 0 4rem;max-width:44rem}.doc section{border-top:1px solid var(--line);padding:1.5rem 0 .5rem}
.doc h2{font-size:1.1rem;margin-bottom:.6rem}.doc p,.doc li{color:var(--sec);margin-bottom:.7rem}.doc ul{padding-left:1.2rem}
.toc ol{padding-left:1.2rem;margin-bottom:2rem;color:var(--dim)}.toc a{display:inline-flex;align-items:center;min-height:44px;color:var(--sec);font-size:.92rem}
/* footer */
.ftr{border-top:1px solid var(--line);background:#000;padding:3rem 0 calc(2rem + env(safe-area-inset-bottom));font-size:.82rem}
.cols{width:var(--w);margin:0 auto;display:grid;grid-template-columns:1fr 1fr;gap:2rem 1.5rem}
@media(min-width:700px){.cols{grid-template-columns:repeat(3,1fr)}}
.cols h2{font-size:.75rem;font-weight:600;letter-spacing:.06em;text-transform:uppercase;color:var(--fg);margin-bottom:.4rem}
.cols a{display:flex;align-items:center;min-height:44px;color:var(--sec);text-decoration:none;overflow-wrap:anywhere}.cols a:hover{color:var(--fg)}
.base{width:var(--w);margin:2.5rem auto 0;padding-top:1.25rem;border-top:1px solid var(--line);color:var(--dim)}.base p+p{margin-top:.4rem}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}.menu span{transition:none}}
/* ===== v3 additions: audio-reactive background, beat demo, badge, compare ===== */
:root{--lo:#ff5a6e;--mid:#52dd8c;--hi:#5aa6ff}
.fx{position:absolute;inset:0;width:100%;height:100%;display:block}
/* App Store badge (no link until live) */
.badge{display:inline-block;margin-top:2rem;line-height:0}
.badge svg{width:168px;height:auto;display:block}
.badge+.soonline{margin-top:.7rem;color:var(--dim);font-size:.82rem}
/* beat demo */
.stage{margin-top:2.25rem;display:grid;gap:1.25rem}
@media(min-width:900px){.stage{grid-template-columns:minmax(220px,300px) 1fr;align-items:end;gap:2rem}}
.monitor{position:relative;width:min(62vw,300px);aspect-ratio:9/16;margin:0 auto;border:1px solid var(--line);border-radius:22px;overflow:hidden;background:#000}
.monitor canvas{position:absolute;inset:0;width:100%;height:100%;display:block}
.hud{position:absolute;left:0;right:0;top:0;display:flex;justify-content:space-between;padding:.7rem .85rem;font-size:.68rem;letter-spacing:.06em;text-transform:uppercase;color:rgba(255,255,255,.85);font-variant-numeric:tabular-nums;pointer-events:none;text-shadow:0 1px 2px rgba(0,0,0,.6)}
.lanewrap{min-width:0}
.lane{position:relative;height:150px;border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.lane canvas{position:absolute;inset:0;width:100%;height:100%;display:block}
.ctl{display:flex;flex-wrap:wrap;align-items:center;gap:.25rem 1.25rem;margin-top:.6rem}
.ctl .grp{display:flex;align-items:center;gap:.1rem}
.ctl .k{font-size:.72rem;font-weight:500;letter-spacing:.1em;text-transform:uppercase;color:var(--dim);margin-right:.5rem}
.tb{min-height:44px;min-width:44px;padding:0 .5rem;background:none;border:0;border-bottom:1px solid transparent;color:var(--sec);font:inherit;font-size:.9rem;cursor:pointer;font-variant-numeric:tabular-nums}
.tb:hover{color:var(--fg)}.tb[aria-pressed=true],.tb[aria-checked=true]{color:var(--fg);border-bottom-color:var(--red)}
.fine{margin-top:.5rem;font-size:.8rem;color:var(--dim)}
.legend{display:flex;flex-wrap:wrap;gap:.25rem 1.1rem;margin-top:.75rem;font-size:.8rem;color:var(--dim)}
.legend i{display:inline-block;width:8px;height:8px;border-radius:50%;margin-right:.4rem;vertical-align:middle}
/* tech rows with band marker */
.tech>div dt::before{content:"";display:inline-block;width:6px;height:6px;border-radius:50%;margin-right:.6rem;vertical-align:middle;background:var(--c,var(--fg))}
/* comparison table */
.cmpwrap{margin-top:2rem;overflow-x:auto;-webkit-overflow-scrolling:touch;border-top:1px solid var(--line)}
.cmp{width:100%;min-width:760px;border-collapse:collapse;font-size:.88rem}
.cmp th,.cmp td{text-align:left;vertical-align:top;padding:.85rem .9rem .85rem 0;border-bottom:1px solid var(--line)}
.cmp thead th{font-size:.72rem;font-weight:600;letter-spacing:.08em;text-transform:uppercase;color:var(--dim);padding-top:1rem}
.cmp thead th.fc{color:var(--fg)}
.cmp tbody th{font-weight:500;width:17%;color:var(--fg)}
.cmp td{color:var(--sec);width:20.75%}
.cmp td.fc{color:var(--fg);box-shadow:inset 1px 0 0 rgba(255,90,110,.45);padding-left:.9rem}
.cmp thead th.fc{box-shadow:inset 1px 0 0 rgba(255,90,110,.45);padding-left:.9rem}
.cmp tbody th{position:sticky;left:0;background:#000;z-index:1}
.note2{margin-top:1rem;font-size:.8rem;color:var(--dim);max-width:46rem}
.note2+.note2{margin-top:.5rem}
@media(prefers-reduced-motion:reduce){.fx{display:none}}
.vh{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap}
.hero .calm{color:var(--fg);margin-top:.9rem}
/* ===== coming-soon page ===== */
body.soonpage{min-height:100svh;display:flex;flex-direction:column}
body.soonpage main{flex:1;display:flex}
body.soonpage .hero{flex:1;min-height:0;padding:clamp(3rem,10vh,6rem) 0}
.ftr.mini{padding:1.5rem 0 calc(1.5rem + env(safe-area-inset-bottom))}
.mini .row{width:var(--w);margin:0 auto;display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:.25rem 1.5rem;color:var(--dim)}
.mini nav{display:flex;flex-wrap:wrap;gap:0 1.25rem}
.mini nav a{display:inline-flex;align-items:center;min-height:44px;color:var(--sec);text-decoration:none;overflow-wrap:anywhere}.mini nav a:hover{color:var(--fg)}
.mini .tm{width:var(--w);margin:.4rem auto 0;color:var(--dim);font-size:.75rem}
/* ===== v4: FreqCut app theme (from Theme.swift, SyncutLockup, SpectrumBin) ===== */
:root{--fg:#fff;--sec:rgba(255,255,255,.78);--dim:rgba(255,255,255,.45);--line:rgba(255,255,255,.12);--surface:#1a1a1a;--surface2:#242424;--elevated:#2e2e2e;--red:#ff2e2e;--playhead:#ff2e2e;--lo:#ff0000;--mid:#00ff00;--hi:#0000ff;--r-btn:10px;--r-card:12px;--r-tile:14px;--r-group:16px}
body{color:#fff}
.word{font-weight:800;letter-spacing:-.055em;background:linear-gradient(180deg,#fff 0,#fff 30%,rgba(255,255,255,.62) 100%);-webkit-background-clip:text;background-clip:text;color:transparent;-webkit-text-fill-color:transparent}
.brand{gap:.55rem;font-size:1.05rem}
.brand .word{font-weight:800}
.mark{width:28px;height:18px}
.mark rect,.logo rect{fill:#fff}
.lockup{display:inline-flex;flex-direction:column;align-items:center;gap:10px;margin-bottom:.6rem}
.lockup .logo{height:72px;width:auto;margin:0 auto;overflow:visible}
.lockup h1.word{font-size:2.6rem;line-height:1;padding:0 .04em .06em 0}
.logo .b{transform-box:fill-box;transform-origin:center;animation:fcLift var(--t) ease-in-out var(--d) infinite alternate,fcWave 2.7s linear calc(var(--cw) + .6s) infinite}
@keyframes fcLift{from{transform:scaleY(.62)}to{transform:scaleY(1)}}
@keyframes fcWave{0%{fill:#fff}5.6%{fill:var(--wc)}11.3%{fill:#fff}100%{fill:#fff}}
.logo .b:nth-child(1){--wc:#8f00ff}.logo .b:nth-child(2){--wc:#5c1fe6}.logo .b:nth-child(3){--wc:#1a59ff}.logo .b:nth-child(4){--wc:#0dd147}.logo .b:nth-child(5){--wc:#ffe60d}.logo .b:nth-child(6){--wc:#ff7a00}.logo .b:nth-child(7){--wc:#ff1f29}
.hero{position:relative;overflow:hidden;padding-bottom:clamp(9rem,22vh,12rem)}
.hero .w{position:relative;z-index:1}
.spec{position:absolute;left:0;right:0;bottom:0;width:100%;height:clamp(110px,18vh,170px);display:block;z-index:0;pointer-events:none}
.badge svg rect:first-child{rx:10px}
.tb[aria-pressed=true],.tb[aria-checked=true]{border-bottom-color:var(--playhead)}
.cmp td.fc,.cmp thead th.fc{box-shadow:inset 1px 0 0 rgba(255,46,46,.5)}
.monitor{border-radius:var(--r-group)}
.tag{border-radius:6px}
.lane{border-radius:var(--r-btn);background:var(--surface);border:0;overflow:hidden}
@media(prefers-reduced-motion:reduce){.logo .b{animation:none}}
.hero{padding-bottom:calc(clamp(110px,18vh,170px) + 2.5rem)}
body.soonpage .hero{padding-bottom:calc(clamp(110px,18vh,170px) + 2.5rem)}

@media(max-width:640px){.lockup .logo{height:56px}.lockup h1.word{font-size:2.1rem}}

/* ===== social links (footer) ===== */
.soc{width:var(--w);margin:0 auto;display:flex;flex-wrap:wrap;align-items:center;gap:0 .25rem}
.soc a{display:inline-flex;align-items:center;justify-content:center;min-width:44px;min-height:44px;color:var(--sec);text-decoration:none;transition:color .15s}
.soc a:first-child{margin-left:-13px}
.soc a:hover,.soc a:focus-visible{color:var(--fg)}
.soc svg{display:block;width:18px;height:18px}
.ftr .soc{margin-top:2rem}
.ftr.mini .soc{margin-top:.25rem;gap:0 .25rem}
@media(prefers-reduced-motion:reduce){.soc a{transition:none}}