/* Piano Lab — Variant C · "music data observatory" (Ventriloc reference) */
@font-face{font-family:"PL Display";src:url(../fonts/intertight-400.woff2) format("woff2");font-weight:400;font-style:normal;font-display:swap}
@font-face{font-family:"Inter";src:url(../fonts/inter-var.woff2) format("woff2");font-weight:100 900;font-style:normal;font-display:swap}
:root{
  --graphite:#202020;--white:#fff;--ash:#efefef;--fog:#f5f5f5;--ivory:#ebe6dd;--steel:#4d4d4d;
  --slate:#828282;--muted:#696969;/* darkened Slate for small text (AA 5.4:1 on white, 4.8:1 on Ash) */
  --mist:#e8e8e8;--ember:#ff682c;--brass:#816729;
  --f-display:"PL Display","Inter Tight","Inter",ui-sans-serif,system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
  --f-body:"Inter",ui-sans-serif,system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
  --track:-0.02em;--wrap:1200px;--gap:20px;--section:80px;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;scroll-padding-top:90px}
body{margin:0;background:var(--white);color:var(--graphite);font:400 16px/1.5 var(--f-body);-webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility}
img,svg{display:block;max-width:100%}
img{height:auto}
a{color:inherit}
:focus-visible{outline:2px solid var(--graphite);outline-offset:3px}
.wrap{max-width:var(--wrap);margin:0 auto;padding:0 20px}
@media(min-width:760px){.wrap{padding:0 40px}}
.skip{position:absolute;left:-999px;top:8px;background:var(--graphite);color:#fff;padding:10px 16px;z-index:100}
.skip:focus{left:8px}
.muted{color:var(--muted)}

/* ---------- type ---------- */
.display,.h2,.h3,.btn,.nav__pill a,.lang,.caption,.kicker,.price,.wordmark,.dcard__t,.dcard__big b,.ring__num,.timesig,.tag{font-family:var(--f-display);font-weight:400;letter-spacing:var(--track)}
.display{font-size:clamp(42px,9.6vw,66px);line-height:.95;margin:0 0 24px;text-wrap:balance}
.display span,.h2 span{display:block}
.h2{font-size:clamp(32px,6vw,40px);line-height:1.12;margin:0 0 16px;text-wrap:balance}
.h3{font-size:20px;line-height:1.25;margin:0 0 8px}
.kicker{font-size:13px;line-height:1.3;color:var(--brass);margin:0 0 18px;display:flex;align-items:center;gap:10px;flex-wrap:wrap}
.kicker::before{content:"";width:18px;height:1px;background:var(--ember)}
.lead{font-size:18px;line-height:1.45;color:var(--steel);margin:0 0 28px;max-width:34em}
p{margin:0 0 12px}
.ul{text-decoration:underline;text-decoration-color:var(--ember);text-decoration-thickness:1px;text-underline-offset:3px}
.ul:hover{text-decoration-thickness:2px}

/* ---------- buttons ---------- */
.btn{display:inline-flex;align-items:center;gap:10px;font-size:16px;line-height:1;padding:14px 22px;border-radius:0;text-decoration:none;border:1px solid var(--graphite);transition:background .2s,color .2s;white-space:nowrap}
.btn--primary{background:var(--graphite);color:#fff}
.btn--primary:hover{background:#000}
.btn--ghost{background:transparent;color:var(--graphite)}
.btn--ghost:hover{background:var(--graphite);color:#fff}
.btn--sm{padding:10px 18px;font-size:15px}
.arrow{transition:transform .2s}
.btn:hover .arrow{transform:translateX(3px)}
.cta{display:flex;gap:12px;flex-wrap:wrap}

/* ---------- nav ---------- */
.nav{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.92);-webkit-backdrop-filter:saturate(1.2) blur(10px);backdrop-filter:saturate(1.2) blur(10px)}
.nav__bar{display:flex;align-items:center;justify-content:space-between;gap:16px;height:72px}
.nav__logo img{width:78px;height:auto}
.nav__pill{display:none;background:var(--ash);border-radius:200px;padding:8px 22px}
.nav__pill ul{list-style:none;margin:0;padding:0;display:flex;gap:22px}
.nav__pill a{font-size:15px;text-decoration:none;padding:2px 0;border-bottom:1px solid transparent}
.nav__pill a:hover{border-bottom-color:var(--ember)}
.nav__right{display:flex;align-items:center;gap:16px}
.lang{display:flex;gap:10px;font-size:15px}
.lang a{color:var(--muted);text-decoration:none}
.lang a:hover{color:var(--graphite)}
.lang [aria-current]{color:var(--graphite);border-bottom:1px solid var(--ember)}
@media(min-width:1040px){.nav__pill{display:block}.nav__logo img{width:86px}}

/* ---------- hero ---------- */
.hero{padding:36px 0 56px}
.hero__grid{display:grid;gap:44px}
.meta{display:flex;align-items:center;gap:10px;font-size:14px;color:var(--muted);margin:22px 0 0}
.dot{width:7px;height:7px;border-radius:50%;background:var(--ember);flex:none}
@media(min-width:1000px){
  .hero{padding:64px 0 90px}
  .hero__grid{grid-template-columns:minmax(0,1fr) minmax(0,550px);align-items:center;gap:48px}
}

/* cluster of 3 music data cards */
.hero__viz{position:relative}
.cluster{position:relative;display:grid;gap:12px;padding:18px;background:var(--ivory);border-radius:6px 0 0 0}
.dcard{background:#fff;border-radius:20px;border:1px solid var(--mist);padding:18px 20px;position:relative;min-width:0}
.dcard__head{display:flex;justify-content:space-between;align-items:baseline;gap:10px}
.dcard__t{font-size:16px;line-height:1.2}
.dcard__t--sm{font-size:14px}
.dcard__m{font-size:12px;color:var(--muted);font-variant-numeric:tabular-nums;white-space:nowrap}
.dcard__big{margin:8px 0 4px;font-size:12px;color:var(--muted);display:flex;align-items:baseline;gap:8px}
.dcard__big b{font-size:28px;color:var(--graphite);min-width:1.6em}
.dcard__hz{font-variant-numeric:tabular-nums;color:var(--brass)}
.wave{width:100%;height:96px;overflow:visible}
.wave .axis{stroke:var(--mist);stroke-width:1;vector-effect:non-scaling-stroke}
.wave .w1{fill:none;stroke:var(--ember);stroke-width:2;stroke-linejoin:round;vector-effect:non-scaling-stroke}
.wave .w2{fill:none;stroke:var(--brass);stroke-width:1;opacity:.75;vector-effect:non-scaling-stroke}
.spec{width:100%;height:30px;margin-top:8px}
.spec .bar{fill:#d8d2c6}
.spec .bar.hot{fill:var(--ember)}
.ring{width:132px;height:132px;margin:6px auto 4px}
.ring__track{fill:none;stroke:var(--ash);stroke-width:6}
.ring__arc{fill:none;stroke:var(--ember);stroke-width:6;stroke-linecap:butt}
.ring__dot{fill:var(--graphite)}
.tick{fill:#fff;stroke:var(--graphite);stroke-width:1.2}
.tick.on{fill:var(--graphite)}
.ring__num{font-size:30px;fill:var(--graphite)}
.ring__unit{font:500 10px var(--f-body);fill:var(--muted);letter-spacing:.04em}
.dyn{border-top:1px solid var(--mist);padding-top:10px;margin-top:4px}
.dyn svg{width:100%;height:26px;margin:6px 0 2px}
.hairpin{fill:none;stroke:var(--brass);stroke-width:1}
.dyn__dot{fill:var(--ember)}
.dyn__scale{display:flex;justify-content:space-between;font:italic 600 11px Georgia,"Times New Roman",serif;color:var(--muted)}
#dyn-mark{font:italic 600 13px Georgia,"Times New Roman",serif;color:var(--graphite)}
.staff{width:100%;height:auto;overflow:visible}
.staff__lines line{stroke:#cfcfcf;stroke-width:1}
.timesig{font-size:30px;fill:var(--graphite)}
.playhead{stroke:var(--ember);stroke-width:1;stroke-dasharray:3 4}
.trail{fill:none;stroke:var(--ember);stroke-width:1.6;stroke-linejoin:round}
.contour{fill:none;stroke:var(--brass);stroke-width:1;opacity:.8}
.note ellipse{fill:var(--graphite)}
.note line{stroke:var(--graphite);stroke-width:1.4}
.note .ledger{stroke:#9a9a9a;stroke-width:1}
.note.played ellipse{fill:var(--ember)}
.note.played line.stem{stroke:var(--ember)}

@media(min-width:560px){
  .cluster{grid-template-columns:1fr 200px;padding:22px}
  .dcard--wave{grid-column:1/2}
  .dcard--metro{grid-column:2/3;grid-row:1/3}
  .dcard--staff{grid-column:1/2}
}
@media(min-width:1000px){
  /* overlapping editorial cluster */
  .cluster{display:block;height:560px;padding:0;background:none}
  .cluster::before{content:"";position:absolute;inset:40px 0 30px 40px;background:var(--ivory);border-radius:6px 0 0 0}
  .dcard{position:absolute}
  .dcard--wave{left:0;top:0;width:372px}
  .dcard--metro{right:0;top:130px;width:212px;z-index:2}
  .dcard--staff{left:36px;bottom:0;width:462px;z-index:1}
}

/* ---------- recognition strip ---------- */
.strip{padding:8px 0 64px}
.strip__in{display:flex;flex-direction:column;gap:20px;border-top:1px solid var(--mist);padding-top:28px}
.caption{font-size:13px;color:var(--brass);margin:0}
.strip__logos{list-style:none;margin:0;padding:0;display:flex;flex-wrap:wrap;gap:28px 56px;align-items:center}
.strip__logos li{display:flex;align-items:center;gap:16px}
.strip__logos img{width:128px}
.wordmark{font-size:34px;line-height:1;color:var(--graphite);letter-spacing:.02em}
.strip__txt{font-size:14px;line-height:1.35;color:var(--steel)}
@media(min-width:900px){.strip__in{flex-direction:row;align-items:center;justify-content:space-between}}

/* ---------- sections ---------- */
.section{padding:var(--section) 0}
.band{background:var(--ash)}
.head{margin-bottom:40px}
.head--split{display:grid;gap:8px}
@media(min-width:900px){.head--split{grid-template-columns:1fr 1fr;align-items:end;gap:40px}.head--split .lead{margin-bottom:16px}}
@media(min-width:1000px){.section{padding:110px 0}}
.grid3{display:grid;gap:var(--gap)}
@media(min-width:800px){.grid3{grid-template-columns:repeat(3,1fr)}}
.fcard{background:#fff;border-radius:6px 0 0 0;padding:36px 28px 32px}
.fcard p{color:var(--steel);margin:0}
.fcard .icon svg{width:40px;height:40px;fill:none;stroke:var(--graphite);stroke-width:1.2;margin-bottom:44px}
.icon .ac,.row__i .ac{stroke:var(--ember)}
@media(min-width:1000px){.fcard{padding:56px 40px 44px}}

/* lessons */
.lessons{display:grid;gap:40px}
@media(min-width:960px){.lessons{grid-template-columns:400px 1fr;gap:80px}.lessons__side{position:sticky;top:110px;align-self:start}}
.photo-card{margin:8px 0 0;border-radius:20px;overflow:hidden;position:relative;background:var(--ivory)}
.photo-card img{width:100%;aspect-ratio:4/4.4;object-fit:cover;filter:saturate(.8)}
.photo-card figcaption{position:absolute;left:12px;bottom:12px;right:12px;background:#fff;padding:10px 14px;font-size:13px;color:var(--steel);border-radius:6px 0 0 0;border-left:2px solid var(--ember)}
.rows{list-style:none;margin:0;padding:0;border-top:1px solid var(--graphite)}
.row{display:grid;grid-template-columns:34px 1fr;gap:6px 14px;padding:26px 0;border-bottom:1px solid var(--mist)}
.row__n{font:500 12px var(--f-body);color:var(--muted);padding-top:5px;font-variant-numeric:tabular-nums}
.row__i{display:none}
.row__b p{color:var(--steel);margin:0;max-width:34em}
.row .tag{grid-column:2;justify-self:start}
@media(min-width:640px){
  .row{grid-template-columns:44px 40px 1fr auto;gap:20px;align-items:start}
  .row__i{display:block;width:36px;height:36px;fill:none;stroke:var(--graphite);stroke-width:1.2}
  .row .tag{grid-column:auto}
}
.tag{display:inline-block;font-size:13px;line-height:1;color:var(--brass);border:1px solid #d4c6a6;border-radius:20px;padding:7px 12px;white-space:nowrap}
.tag--soon{color:var(--brass);background:#fff}
.note{font-size:14px;color:var(--muted);margin:22px 0 0;max-width:40em}
.note a{color:var(--graphite)}

/* trial */
.trial{display:grid;gap:28px;background:var(--ivory);border-radius:6px 0 0 0;padding:44px 24px}
.trial .lead{color:#3f3f3f}
.trial .kicker{color:#6e5822}
.pcard{background:#fff;border-radius:20px;padding:28px 28px 26px}
.price{font-size:clamp(54px,12vw,76px);line-height:.9;margin:18px 0 6px}
.price__dur{font-size:15px;color:var(--steel);margin:0}
.notes-line{width:200px;height:54px;overflow:visible}
.notes-line line{stroke:var(--graphite);stroke-width:1.2}
.notes-line > line{stroke:var(--mist)}
.notes-line ellipse{fill:var(--graphite)}
.notes-line .n{animation:hop 2.4s cubic-bezier(.3,.7,.3,1) infinite;transform-box:fill-box;transform-origin:center}
.notes-line .n2{animation-delay:.3s}.notes-line .n3{animation-delay:.6s}.notes-line .n4{animation-delay:.9s}
@keyframes hop{0%,40%,100%{transform:translateY(0)}12%{transform:translateY(-7px)}}
.notes-line .n ellipse{animation:glow 2.4s infinite}
.notes-line .n2 ellipse{animation-delay:.3s}.notes-line .n3 ellipse{animation-delay:.6s}.notes-line .n4 ellipse{animation-delay:.9s}
@keyframes glow{0%,30%,100%{fill:var(--graphite)}10%{fill:var(--ember)}}
@media(min-width:900px){.trial{grid-template-columns:1fr 360px;align-items:center;gap:60px;padding:70px 60px}}

/* exams */
.exam{display:grid;gap:40px;align-items:center}
@media(min-width:900px){.exam{grid-template-columns:1fr 480px;gap:80px}}
.vcard{background:#fff;border:1px solid var(--mist);border-radius:20px;padding:28px}
.journey{list-style:none;margin:30px 0 34px;padding:0;display:flex;justify-content:space-between;position:relative}
.journey::before{content:"";position:absolute;left:8px;right:8px;top:7px;height:1px;background:linear-gradient(90deg,var(--ember),var(--brass))}
.journey li{position:relative;display:flex;flex-direction:column;align-items:center;gap:10px;font-size:12px;color:var(--muted);font-variant-numeric:tabular-nums}
.journey li::before{content:"";width:15px;height:15px;border-radius:50%;background:#fff;border:1px solid var(--graphite);position:relative}
.journey li.on::before{background:var(--graphite)}
.journey li:first-child span{position:relative;left:10px}
.vcard__logo{width:200px;border-top:1px solid var(--mist);padding-top:22px;width:100%;max-width:220px;box-sizing:content-box}

/* visit */
.fcard--w address{font-style:normal;color:var(--steel);margin-bottom:20px;line-height:1.6}
.hours{width:100%;border-collapse:collapse;font-size:15px}
.hours th,.hours td{padding:10px 0;border-bottom:1px solid var(--mist);text-align:left;font-weight:400;color:var(--steel)}
.hours td{text-align:right;color:var(--graphite);font-variant-numeric:tabular-nums;white-space:nowrap}
.contact{list-style:none;margin:0;padding:0;display:grid;gap:16px}
.contact li{display:grid;gap:2px;font-size:15px}
.contact .muted{font-size:13px}
.contact a{text-decoration:underline;text-decoration-color:var(--ember);text-underline-offset:3px}

/* gift */
.gift{display:grid;gap:40px;align-items:center}
.gift__img{margin:0;border-radius:20px;overflow:hidden}
.gift__img img{width:100%;aspect-ratio:3/2;object-fit:cover}
@media(min-width:960px){.gift{grid-template-columns:580px 1fr;gap:80px}}

/* faq */
.faqwrap{display:grid;gap:10px}
@media(min-width:960px){.faqwrap{grid-template-columns:360px 1fr;gap:80px}}
.faq{border-top:1px solid var(--graphite)}
.faq details{border-bottom:1px solid #dcdcdc}
.faq summary{list-style:none;cursor:pointer;padding:22px 40px 22px 0;position:relative;font:400 18px/1.35 var(--f-display);letter-spacing:var(--track)}
.faq summary::-webkit-details-marker{display:none}
.plus{position:absolute;right:4px;top:50%;width:14px;height:14px;margin-top:-7px}
.plus::before,.plus::after{content:"";position:absolute;left:0;top:6.5px;width:14px;height:1px;background:var(--graphite);transition:transform .25s}
.plus::after{transform:rotate(90deg)}
details[open] .plus::after{transform:rotate(0);background:var(--ember)}
.faq p{color:var(--steel);padding:0 40px 22px 0;margin:0;max-width:44em}

/* footer */
.footer{padding:40px 0 30px;font-size:15px}
.footer__wave{width:100%;height:24px;margin-bottom:40px}
.footer__wave path{fill:none;stroke:var(--brass);stroke-width:1;vector-effect:non-scaling-stroke}
.footer__grid{display:grid;gap:32px;grid-template-columns:1fr 1fr}
.footer__grid > div:first-child{grid-column:1/-1}
@media(min-width:900px){.footer__grid{grid-template-columns:1.2fr 1.4fr 1fr 1fr}.footer__grid > div:first-child{grid-column:auto}}
.footer h3{font:500 13px var(--f-body);color:var(--muted);margin:0 0 14px}
.footer ul{list-style:none;margin:0;padding:0;display:grid;gap:8px}
.footer a{text-decoration:none}
.footer a:hover{text-decoration:underline;text-decoration-color:var(--ember);text-underline-offset:3px}
.footer address{font-style:normal;color:var(--steel);line-height:1.6}
.footer__logo{width:120px}
.footer__bottom{display:flex;flex-wrap:wrap;justify-content:space-between;gap:12px;margin-top:48px;padding-top:20px;border-top:1px solid var(--mist);font-size:13px;color:var(--muted)}
.preview-flag{color:var(--brass)}

@media(max-width:420px){.nav__right .btn--sm{padding:9px 12px;font-size:14px}.lang{gap:8px;font-size:14px}}
@media(prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  .notes-line .n,.notes-line .n ellipse{animation:none}
  *{transition:none!important}
}
@media(max-width:559px){
  .cluster{padding:14px;gap:10px}
  .dcard{padding:16px}
  .dcard--metro{display:grid;grid-template-columns:104px 1fr;gap:4px 16px;align-items:center}
  .dcard--metro > .dcard__head{grid-column:1/-1}
  .dcard--metro .ring{width:104px;height:104px;margin:4px 0 0}
  .dcard--metro .dyn{border-top:0;border-left:1px solid var(--mist);padding:0 0 0 14px;margin:0}
  .wave{height:80px}
}
html[lang=ru] .display{font-size:clamp(38px,8.6vw,54px)}
html[lang=ru] .h2{font-size:clamp(30px,5.6vw,38px)}