:root{--ink:#111111;--paper:#F7F7F5;--grey:#6E6E6E;--line:#DEDEDA;--navy:#1F3864;
 --gold:#A98336;--gutter:clamp(1.25rem,5vw,4.5rem)}
*{box-sizing:border-box}
body{margin:0;background:var(--paper);color:var(--ink);
 font-family:"Public Sans",-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,sans-serif;
 font-size:17px;line-height:1.65;font-weight:380;-webkit-font-smoothing:antialiased}
img{max-width:100%;height:auto;display:block}
h1,h2,h3{font-family:"Archivo",sans-serif;font-weight:700;letter-spacing:-.025em;margin:0}
h1{font-size:clamp(2.2rem,6.2vw,4.1rem);line-height:1.03}
h2{font-size:clamp(1.5rem,3.5vw,2.3rem);line-height:1.13}
h3{font-size:1.1rem;line-height:1.3}
p{margin:0 0 1.1em}
.lede{font-size:clamp(1.06rem,2.1vw,1.3rem);line-height:1.55}
.measure{max-width:34rem}
.label{font-family:"IBM Plex Mono",ui-monospace,monospace;font-size:.68rem;letter-spacing:.19em;
 text-transform:uppercase;color:var(--grey);display:block}

header.top{border-bottom:1px solid var(--line);position:sticky;top:0;background:var(--paper);z-index:40}
.top-in{max-width:76rem;margin:0 auto;padding:.8rem var(--gutter);display:flex;align-items:center;gap:1.3rem}
.brand{display:flex;align-items:center;gap:.6rem;text-decoration:none;margin-right:auto}
.brand img{width:26px}
.brand span{font-family:"Archivo";font-weight:700;letter-spacing:.1em;font-size:.82rem;color:var(--navy)}
.nav{display:flex;gap:1.25rem;align-items:center}
.nav a{text-decoration:none;font-size:.92rem;color:var(--ink);padding-bottom:2px;
 border-bottom:2px solid transparent}
.nav a:hover{border-bottom-color:var(--line)}
.nav a[aria-current="page"]{border-bottom-color:var(--gold)}
.burger{display:none;background:none;border:0;font:inherit;cursor:pointer;padding:.3rem}

main{max-width:76rem;margin:0 auto;padding:0 var(--gutter)}
section{padding:clamp(2.8rem,6.5vw,5rem) 0;border-bottom:1px solid var(--line)}
section:last-of-type{border-bottom:0}
.head{margin-bottom:2rem}
.head .label{margin-bottom:.75rem}
.hero{padding-top:clamp(2.5rem,7vw,5rem)}
.hero h1{max-width:20ch;margin-bottom:1.3rem}
.hero .lede{max-width:44ch}

.cta{display:inline-block;text-decoration:none;background:var(--ink);color:var(--paper);
 border:1px solid var(--ink);padding:.9rem 1.5rem;font-family:"IBM Plex Mono",monospace;
 font-size:.78rem;letter-spacing:.13em;text-transform:uppercase}
.cta:hover{background:var(--navy);border-color:var(--navy)}
.cta.ghost{background:none;color:var(--ink)}
.cta.ghost:hover{background:var(--ink);color:var(--paper)}
.after{font-size:.85rem;color:var(--grey);margin-top:.8rem}

.lines{margin-top:2.6rem;border-top:1px solid var(--ink)}
.line{display:grid;grid-template-columns:1fr auto;gap:.35rem 1.5rem;align-items:start;
 padding:1.1rem 0;border:0;border-bottom:1px solid var(--line);width:100%;text-align:left;
 background:none;font:inherit;color:inherit;cursor:pointer}
.line:hover .line-pt,.line:focus-visible .line-en{color:var(--navy)}
.line:focus-visible{outline:2px solid var(--navy);outline-offset:3px}
.line-en{font-family:"Archivo";font-weight:600;font-size:clamp(1.15rem,2.6vw,1.5rem);
 letter-spacing:-.015em;grid-column:1}
.line-ipa{font-family:"IBM Plex Mono",monospace;font-size:.76rem;color:var(--grey);grid-column:1;grid-row:2}
.line-do{grid-column:2;grid-row:1 / span 2;text-align:right;max-width:16rem;font-size:.85rem;
 color:var(--grey);line-height:1.4}
.line-do b{display:block;color:var(--ink);font-weight:600}
.line.speaking .line-en{color:var(--navy)}
.hint{font-family:"IBM Plex Mono",monospace;font-size:.72rem;letter-spacing:.12em;color:var(--grey);
 margin:0 0 .8rem;text-transform:uppercase}
.hint b{color:var(--ink);font-weight:600}

.two{display:grid;grid-template-columns:repeat(2,1fr);gap:clamp(1.5rem,4vw,3.5rem)}
.three{display:grid;grid-template-columns:repeat(3,1fr);gap:clamp(1.5rem,3.5vw,3rem)}
.item{border-top:2px solid var(--ink);padding-top:1rem}
.item .label{margin-bottom:.5rem}
.item h3{margin-bottom:.5rem}
.item p{font-size:.95rem;color:var(--grey);margin-bottom:0}
.item p strong{color:var(--ink);font-weight:600}

.offer{display:grid;grid-template-columns:1fr auto;gap:1.3rem 2.5rem;align-items:end;
 border-top:2px solid var(--ink);padding:1.5rem 0 2.2rem}
.offer h3{font-size:clamp(1.3rem,3vw,1.85rem);margin-bottom:.5rem}
.offer .who{font-size:.95rem;color:var(--grey);max-width:48ch;margin-bottom:0}

.steps{counter-reset:s;display:grid;gap:1.7rem;max-width:46rem}
.step{display:grid;grid-template-columns:2.4rem 1fr;gap:1.1rem;align-items:start}
.step::before{counter-increment:s;content:counter(s,decimal-leading-zero);
 font-family:"IBM Plex Mono",monospace;font-size:.82rem;color:var(--navy);padding-top:.3rem}
.step h3{margin-bottom:.35rem}
.step p{margin:0;color:var(--grey);font-size:.96rem}

.units{list-style:none;padding:0;margin:0;display:grid;grid-template-columns:repeat(2,1fr);
 gap:0 2.5rem}
.units li{border-top:1px solid var(--line);padding:.75rem 0;font-size:.97rem;display:flex;gap:.9rem}
.units li span{font-family:"IBM Plex Mono",monospace;font-size:.72rem;color:var(--navy);
 padding-top:.28rem}

.fit{border-top:2px solid var(--ink);padding-top:1rem}
.fit ul{list-style:none;padding:0;margin:.7rem 0 0}
.fit li{padding:.45rem 0 .45rem 1.5rem;position:relative;font-size:.95rem;color:var(--grey)}
.fit li::before{position:absolute;left:0;font-family:"IBM Plex Mono",monospace;font-size:.78rem}
.fit.yes li::before{content:"✓";color:var(--navy)}
.fit.no li::before{content:"✕";color:var(--grey)}

.bio{display:grid;grid-template-columns:14rem 1fr;gap:clamp(1.4rem,4vw,3.2rem);align-items:start}
.bio img{border:1px solid var(--line)}
.creds{list-style:none;padding:0;margin:1.2rem 0 0;display:grid;gap:.5rem}
.creds li{font-size:.92rem;color:var(--grey);border-top:1px solid var(--line);padding-top:.5rem}

.legalbody h2{margin-top:2rem}
.legalbody p{max-width:38rem;font-size:.97rem}

footer{border-top:1px solid var(--ink)}
.foot-in{max-width:76rem;margin:0 auto;padding:2.4rem var(--gutter);display:grid;
 grid-template-columns:2fr 1fr 1fr;gap:2rem}
.foot-in p{font-size:.88rem;color:var(--grey);max-width:32ch}
.foot-in ul{list-style:none;padding:0;margin:.7rem 0 0}
.foot-in li{margin-bottom:.45rem}
.foot-in a{font-size:.9rem;text-decoration:none;color:var(--ink)}
.foot-in a:hover{color:var(--navy)}
.legal{border-top:1px solid var(--line);font-family:"IBM Plex Mono",monospace;font-size:.68rem;
 letter-spacing:.08em;color:var(--grey);padding:1rem var(--gutter);max-width:76rem;margin:0 auto;
 text-transform:uppercase}


.mailbox{display:inline-flex;align-items:center;gap:.75rem;flex-wrap:wrap;
 border:1px solid var(--ink);padding:.7rem 1rem}
.mailbox .label{margin:0}
.mailbox b{font-family:"Archivo";font-weight:600;font-size:1.02rem;letter-spacing:-.01em}
.copy{font:inherit;font-family:"IBM Plex Mono",monospace;font-size:.68rem;letter-spacing:.12em;
 text-transform:uppercase;background:none;border:1px solid var(--line);padding:.3rem .6rem;
 cursor:pointer;color:var(--grey)}
.copy:hover{border-color:var(--ink);color:var(--ink)}
.copy.done{border-color:var(--navy);color:var(--navy)}

@media (max-width:860px){
  .two,.three,.units,.foot-in{grid-template-columns:1fr}
  .offer{grid-template-columns:1fr;align-items:start}
  .bio{grid-template-columns:1fr}
  .bio img{max-width:13rem}
  .line{grid-template-columns:1fr}
  .line-do{grid-column:1;grid-row:auto;text-align:left;max-width:none;margin-top:.3rem}
  .nav{display:none;position:absolute;top:100%;left:0;right:0;background:var(--paper);
   border-bottom:1px solid var(--line);flex-direction:column;align-items:flex-start;gap:0;
   padding:.5rem var(--gutter) 1rem}
  .nav.open{display:flex}
  .nav a{padding:.6rem 0;width:100%}
  .burger{display:block}
}
.author{display:grid;grid-template-columns:8.5rem 1fr;gap:1.4rem;align-items:start;
 border-top:1px solid var(--line);padding-top:1.5rem;margin-top:2.6rem;max-width:40rem}
.author img{border:1px solid var(--line);width:100%;height:auto}
.author p{margin:0;font-size:.93rem;color:var(--grey);padding-top:.15rem}
.author b{display:block;color:var(--ink);font-family:"Archivo";font-weight:600;font-size:1.05rem;
 letter-spacing:-.01em;margin-bottom:.3rem}
.vid{margin-top:2.4rem;border-top:2px solid var(--ink);padding-top:1.2rem}
.vid .frame{position:relative;padding-bottom:56.25%;height:0;overflow:hidden;background:#000}
.vid iframe{position:absolute;inset:0;width:100%;height:100%;border:0}
@media (max-width:600px){.author{grid-template-columns:6rem 1fr}}
.spk{width:19px;height:19px;flex:0 0 auto;stroke:var(--ink);stroke-width:2;
 stroke-linecap:round;stroke-linejoin:round;fill:none;margin-top:.22rem}
.spk path:first-child{fill:var(--ink)}
.line:hover .spk,.line:focus-visible .spk{stroke:var(--navy)}
.line:hover .spk path:first-child,.line:focus-visible .spk path:first-child{fill:var(--navy)}
.line.speaking .spk{stroke:var(--navy)}
.line.speaking .spk path:first-child{fill:var(--navy)}
.line.speaking .spk path:first-child{fill:var(--navy)}
.line.speaking .spk .w1{animation:onda .9s ease-in-out infinite}
.line.speaking .spk .w2{animation:onda .9s ease-in-out .15s infinite}
@keyframes onda{0%,100%{opacity:.25}50%{opacity:1}}
.line-alvo{display:flex;gap:.6rem;align-items:flex-start;grid-column:1}
@media (prefers-reduced-motion:reduce){*{transition:none!important;animation:none!important}}





.wrong{font-family:"Archivo";font-weight:600;color:var(--grey);text-decoration:line-through}
.demo{border:1px solid var(--ink);padding:clamp(1.3rem,3.5vw,2.4rem);background:#fff}
.demo h3{font-size:clamp(1.25rem,3vw,1.7rem);margin-bottom:1.4rem}
.layer{border-top:1px solid var(--line);padding:1.1rem 0}
.layer:first-of-type{border-top:2px solid var(--ink)}
.layer .label{margin-bottom:.45rem}
.layer p{margin:0;font-size:.97rem}
.keys{list-style:none;padding:0;margin:.6rem 0 0;counter-reset:k}
.keys li{counter-increment:k;padding:.4rem 0 .4rem 2rem;position:relative;
 font-family:"Archivo";font-weight:600;font-size:1.05rem}
.keys li::before{content:counter(k);position:absolute;left:0;font-family:"IBM Plex Mono",monospace;
 font-size:.78rem;color:var(--navy);top:.62rem}





.wrong{font-family:"Archivo";font-weight:600;color:var(--grey);text-decoration:line-through}
.demo{border:1px solid var(--ink);padding:clamp(1.3rem,3.5vw,2.4rem);background:#fff}
.demo h3{font-size:clamp(1.25rem,3vw,1.7rem);margin-bottom:1.4rem}
.layer{border-top:1px solid var(--line);padding:1.1rem 0}
.layer:first-of-type{border-top:2px solid var(--ink)}
.layer .label{margin-bottom:.45rem}
.layer p{margin:0;font-size:.97rem}
.keys{list-style:none;padding:0;margin:.6rem 0 0;counter-reset:k}
.keys li{counter-increment:k;padding:.4rem 0 .4rem 2rem;position:relative;
 font-family:"Archivo";font-weight:600;font-size:1.05rem}
.keys li::before{content:counter(k);position:absolute;left:0;font-family:"IBM Plex Mono",monospace;
 font-size:.78rem;color:var(--navy);top:.62rem}