/* Single light look: white pages, one blue, soft shadows. Faint fretboard and CAGED chord drawings sit behind the content as the only decoration. */
:root{
  --bg:#FFFFFF; --soft:#F5F8FD; --ink:#0B1730; --muted:#5B6980; --line:#E3E9F3;
  --blue:#1F5FD6; --blue-deep:#16409A; --blue-soft:#EAF1FD; --blue-line:#C9DAF7; --white:#FFFFFF;
  --shadow:0 1px 2px rgba(15,40,90,.05),0 8px 24px rgba(15,40,90,.07);
  --font:"Plus Jakarta Sans","Helvetica Neue",Arial,sans-serif;
  color-scheme:light;
}
*{box-sizing:border-box}
body{background:var(--bg);color:var(--ink);font:16px/1.65 var(--font);
  padding-left:max(16px,env(safe-area-inset-left,0px));padding-right:max(16px,env(safe-area-inset-right,0px));padding-block:0 48px}
body::before{content:"";position:fixed;inset:0;z-index:-1;pointer-events:none;background:repeating-linear-gradient(135deg,rgba(242,125,40,.18) 0 2px,transparent 2px 38px)}
h1,h2,h3,p{margin:0}
h1{font-size:clamp(2rem,5vw,2.75rem);font-weight:800;line-height:1.1;letter-spacing:-.02em;text-wrap:balance}
h2{font-size:1.125rem;font-weight:700;line-height:1.3}
a{color:var(--blue)}
button,input{font:inherit}
:focus-visible{outline:3px solid var(--blue);outline-offset:2px}
.wrap{max-width:1040px;margin:0 auto;position:relative}
.muted{color:var(--muted)}
.small{font-size:.875rem}

.demo{background:var(--soft);border-bottom:1px solid var(--line);margin-inline:calc(-1*max(16px,env(safe-area-inset-left,0px)));padding:8px max(16px,env(safe-area-inset-left,0px))}
.demo .wrap{display:flex;gap:6px 10px;flex-wrap:wrap;align-items:center;font-size:.8125rem;color:var(--muted)}
.demo button{background:var(--white);border:1px solid var(--line);color:var(--ink);border-radius:999px;padding:3px 12px;cursor:pointer}
.demo button[aria-pressed="true"]{background:var(--blue);border-color:var(--blue);color:#fff}

.top{display:flex;justify-content:space-between;align-items:center;gap:12px;padding:22px 0}
.brand{font-weight:800;color:var(--ink);text-decoration:none;letter-spacing:-.01em;display:flex;align-items:center;gap:10px}
.brand i{width:12px;height:12px;border-radius:50%;background:var(--blue);box-shadow:0 0 0 4px var(--blue-soft)}
.nav{display:flex;gap:20px;align-items:center}
.nav a{color:var(--muted);text-decoration:none}
.linkbtn{background:none;border:0;color:var(--muted);cursor:pointer;padding:4px 0}
.linkbtn:hover,.nav a:hover{color:var(--ink)}

.btn{display:inline-flex;align-items:center;justify-content:center;background:var(--blue);color:#fff;border:1px solid var(--blue);border-radius:10px;padding:11px 20px;font-weight:600;cursor:pointer;text-decoration:none;box-shadow:0 1px 2px rgba(31,95,214,.3)}
.btn:hover{background:var(--blue-deep);border-color:var(--blue-deep)}
.btn.ghost{background:var(--white);color:var(--blue);border-color:var(--blue-line);box-shadow:none}
.btn.ghost:hover{background:var(--blue-soft)}
.btn[disabled]{opacity:.4;cursor:default}
label{font-weight:600;font-size:.9375rem}
input[type=email]{width:100%;padding:12px 14px;border:1px solid var(--line);border-radius:10px;background:var(--white);color:var(--ink)}
.field{display:flex;flex-direction:column;gap:8px}
.screen[hidden]{display:none!important}
.stack{display:flex;flex-direction:column;gap:16px}
.card{background:var(--white);border:1px solid var(--line);border-radius:16px;box-shadow:var(--shadow);padding:28px}
.note{background:var(--blue-soft);border-radius:12px;padding:14px 16px}

/* backdrop drawings */
.art{position:absolute;pointer-events:none;z-index:0}
.art svg{display:block;max-width:100%;height:auto}
.fadeL{-webkit-mask-image:linear-gradient(to right,transparent,#000 40%);mask-image:linear-gradient(to right,transparent,#000 40%)}
.up{position:relative;z-index:1}
.hero{position:relative;padding:56px 0 8px}
.hero .art{right:-40px;top:-10px;width:min(620px,70%)}
@media(max-width:700px){.hero .art{opacity:.45;width:100%;right:-20%}}
.eyebrow{display:inline-block;font-size:.8125rem;font-weight:600;color:var(--blue);background:var(--blue-soft);padding:4px 12px;border-radius:999px;margin-bottom:16px}

/* login + thanks */
.banner{grid-column:1/-1;position:relative;z-index:1;height:clamp(160px,28vw,300px);border-radius:18px;background:#05060d url(/assets/banner.jpg) center/cover no-repeat;box-shadow:var(--shadow)}
.banner video{position:absolute;inset:0;width:100%;height:100%;object-fit:cover}
.banner .scrim{position:absolute;inset:0;background:linear-gradient(to bottom,rgba(6,12,28,.35),rgba(6,12,28,.6))}
.banner .bt{position:relative;display:flex;flex-direction:column;gap:6px;padding:0 16px;padding-bottom:36px}
.banner .bt span{font-size:.8125rem;font-weight:600;letter-spacing:.28em;text-transform:uppercase;color:#BBD0F7}
.banner .bt b{font-size:clamp(1.5rem,5vw,2.75rem);font-weight:800;letter-spacing:-.01em;line-height:1.1}
.staff{position:absolute;pointer-events:none;z-index:0}
.staff svg{display:block;width:100%;height:auto}
.staff svg+svg{margin-top:22px}
.staff.l{left:-60px;top:250px;width:min(340px,30%);transform:rotate(-5deg)}
.staff.r{right:-60px;top:330px;width:min(340px,30%);transform:rotate(4deg)}
@media(max-width:900px){.staff{opacity:.5}.staff.l{left:-90px}.staff.r{right:-90px}}
.center{position:relative;padding:8px 0 48px;display:grid;grid-template-columns:minmax(0,420px) minmax(0,1fr);gap:24px;align-items:start}
.center .card{width:100%;position:relative;z-index:2}
.vbox{position:relative;z-index:2;background:var(--white);border:1px solid var(--line);border-radius:16px;box-shadow:var(--shadow);padding:10px}
.vbox video{display:block;width:100%;aspect-ratio:16/9;object-fit:cover;border-radius:10px;background:#0A1220}
.vbox p{padding:10px 4px 2px}
@media(max-width:860px){.center{grid-template-columns:minmax(0,1fr)}.vbox{max-width:none}}
.pagebg{position:fixed;inset:0;width:100%;height:100%;object-fit:cover;opacity:.4;z-index:-1;pointer-events:none}
.banner .bl{position:absolute;left:50%;top:34.5%;transform:translate(-50%,-50%);font-size:clamp(.6rem,1.6vw,.95rem);font-weight:600;letter-spacing:.38em;text-transform:uppercase;color:#8FB0E8;white-space:nowrap;padding-left:.38em}
body.plain::before{display:none}
.vbox{position:relative}
.vbox .snd{position:absolute;left:22px;bottom:58px;background:rgba(10,18,32,.78);color:#fff;border:0;border-radius:999px;padding:8px 14px;font-weight:600;font-size:.875rem;cursor:pointer}
.vbox .snd:hover{background:rgba(10,18,32,.95)}

/* course cards */
.cards{display:grid;grid-template-columns:repeat(auto-fit,minmax(300px,1fr));gap:20px;margin-top:32px;position:relative;z-index:1}
.cc{display:flex;flex-direction:column;background:var(--white);border:1px solid var(--line);border-radius:18px;box-shadow:var(--shadow);overflow:hidden;text-decoration:none;color:var(--ink);min-width:0}
.cc:hover{border-color:var(--blue-line)}
.cc .cover{background:#EAF1FD url(/assets/cover.jpg) center/cover no-repeat;border-bottom:1px solid var(--line);aspect-ratio:16/9}
.cc .cover.off{background:var(--soft)}
.cc .info{padding:20px 22px 22px;display:flex;flex-direction:column;gap:6px}
.cc h2{font-size:1.25rem;font-weight:700}
.tag{align-self:flex-start;font-size:.8125rem;font-weight:600;padding:3px 12px;border-radius:999px;background:var(--blue-soft);color:var(--blue)}
.tag.off{background:var(--line);color:var(--muted)}
.cc.off{box-shadow:none}

/* viewer */
.vh{display:flex;gap:12px;align-items:center;justify-content:space-between;flex-wrap:wrap;padding:6px 0 18px}
.vh a{text-decoration:none;font-weight:600}
.viewer{display:grid;grid-template-columns:330px minmax(0,1fr);gap:0 32px;align-items:start}
@media(max-width:860px){.viewer{grid-template-columns:minmax(0,1fr)}.side{order:2;margin-top:32px}}
.side{background:var(--soft);border:1px solid var(--line);border-radius:18px;padding:16px}
.sec+.sec{margin-top:16px}
.sec h3{font-size:.8125rem;font-weight:700;color:var(--muted);margin:0 0 6px 6px}
.les{display:flex;gap:12px;align-items:center;width:100%;text-align:left;background:transparent;border:1px solid transparent;border-radius:12px;padding:8px;color:var(--ink);cursor:pointer}
.les:hover{background:var(--white)}
.les[aria-current="true"]{background:var(--white);border-color:var(--blue-line);box-shadow:var(--shadow)}
.thumb{flex:none;width:68px;aspect-ratio:16/9;border-radius:8px;background:linear-gradient(135deg,#DCE8FC,#F1F6FE);border:1px solid var(--blue-line);display:grid;place-items:center}
.thumb::after{content:"";border-left:9px solid var(--blue);border-top:6px solid transparent;border-bottom:6px solid transparent;margin-left:2px}
.les .t{min-width:0;display:flex;flex-direction:column;line-height:1.3}
.les .t b{font-weight:600;font-size:.9375rem}
.les .t span{font-size:.8125rem;color:var(--muted)}
.player{aspect-ratio:16/9;max-width:100%;border-radius:18px;border:1px solid var(--blue-line);background:#EAF1FD url(/assets/cover.jpg) center/cover no-repeat;display:grid;place-items:center;text-align:center;padding:16px;position:relative;overflow:hidden;box-shadow:var(--shadow)}
.player .art{inset:0;opacity:.7}
.player .art svg{width:100%;height:100%}
.player:not(.yt)>div{position:relative;z-index:1}
.playbtn{width:72px;height:72px;border-radius:50%;background:var(--blue);display:grid;place-items:center;margin:0 auto 12px;box-shadow:0 10px 24px rgba(31,95,214,.35)}
.playbtn::after{content:"";border-left:20px solid #fff;border-top:12px solid transparent;border-bottom:12px solid transparent;margin-left:6px}
.lt{font-size:clamp(1.5rem,4vw,2rem);font-weight:800;letter-spacing:-.015em;line-height:1.15;margin:4px 0 16px}
.boxes{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:14px;margin-top:20px}
.box{background:var(--white);border:1px solid var(--line);border-radius:14px;padding:18px 20px;box-shadow:var(--shadow);min-width:0}
.box h3{font-size:.9375rem;font-weight:700;margin-bottom:8px;color:var(--blue-deep)}
.box p,.box li{font-size:.9375rem;color:var(--ink)}
.box ul,.box ol{margin:0;padding-left:20px;display:flex;flex-direction:column;gap:6px}
.box.wide{grid-column:1/-1}
.box.pdf{display:flex;gap:14px;align-items:center;text-decoration:none;color:var(--ink)}
.box.pdf:hover{border-color:var(--blue)}
.pdfico{flex:none;width:44px;height:54px;border-radius:6px;background:var(--blue-soft);border:1px solid var(--blue-line);display:grid;place-items:end center;padding-bottom:6px;font-size:.6875rem;font-weight:800;color:var(--blue)}
.box.pdf b{display:block;font-weight:700;overflow-wrap:anywhere}
.box.pdf small{color:var(--muted)}
.kc p+p,.kc p+ul,.kc ul+p{margin-top:10px}
.ctl{position:absolute;left:0;right:0;bottom:0;display:flex;align-items:center;gap:12px;padding:28px 16px 12px;background:linear-gradient(to top,rgba(8,16,34,.8),rgba(8,16,34,0));color:#fff;font-size:.8125rem}
.ctl .trk{flex:1;height:4px;border-radius:2px;background:rgba(255,255,255,.35);position:relative}
.ctl .trk i{position:absolute;left:0;top:0;bottom:0;width:0;border-radius:2px;background:#fff}
.ctl .ci{font-size:1rem;line-height:1}
.kc ul,.kc ol{margin:8px 0 0;padding-left:20px;display:flex;flex-direction:column;gap:6px}
.pn{display:flex;justify-content:space-between;gap:12px;margin-top:28px}

/* sales page */
.s-hero{display:grid;grid-template-columns:minmax(0,1.5fr) minmax(0,1fr);gap:28px;align-items:start;padding-top:12px}
@media(max-width:860px){.s-hero{grid-template-columns:minmax(0,1fr)}}
.s-video{display:block;width:100%;aspect-ratio:16/9;border-radius:18px;background:#0A1220;box-shadow:var(--shadow);object-fit:cover}
.s-title{font-size:clamp(2rem,5vw,2.75rem);margin:6px 0 8px}
.stars{color:#E8A317;letter-spacing:2px;font-size:1.0625rem}
.price{display:flex;align-items:baseline;gap:12px;flex-wrap:wrap;margin:8px 0 4px}
.price s{color:var(--muted);font-size:1.25rem}
.price b{font-size:2.5rem;font-weight:800;letter-spacing:-.02em;line-height:1}
.save{background:var(--blue-soft);color:var(--blue);font-weight:700;font-size:.8125rem;padding:3px 10px;border-radius:999px}
.btn.big{width:100%;padding:15px 20px;font-size:1.0625rem;margin-top:14px}
.buybox{position:sticky;top:16px}
.sec-h{font-size:1.5rem;font-weight:800;letter-spacing:-.01em;margin:56px 0 16px}
.prose{max-width:68ch}
.prose p+p{margin-top:14px}
.insgrid{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:14px}
.insgrid .box h3{margin-bottom:6px}
.faq details{border:1px solid var(--line);border-radius:14px;background:var(--white);box-shadow:var(--shadow);padding:0 20px}
.faq details+details{margin-top:10px}
.faq summary{cursor:pointer;font-weight:700;padding:16px 0;list-style:none;display:flex;justify-content:space-between;gap:12px}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";color:var(--blue);font-size:1.25rem;line-height:1}
.faq details[open] summary::after{content:"\2212"}
.faq details p{padding:0 0 18px;max-width:64ch}
.revs{display:grid;grid-template-columns:repeat(auto-fit,minmax(300px,1fr));gap:14px}
.rev{background:var(--white);border:1px solid var(--line);border-radius:14px;box-shadow:var(--shadow);padding:20px;display:flex;flex-direction:column;gap:10px;min-width:0}
.rev p{white-space:pre-line}
.rev .who{font-weight:700}
.cta2{margin-top:56px;display:flex;flex-direction:column;align-items:flex-start;gap:6px;background:var(--soft);border:1px solid var(--line);border-radius:18px;padding:28px}
.cta2 .btn{margin-top:10px}

.hero{overflow:hidden}
.stickybuy{display:none}
@media(max-width:700px){
  .nav a{display:none}
  .brand{font-size:.9375rem;white-space:nowrap}
  .linkbtn{white-space:nowrap}
  .vh>span{display:none}
  .top{padding:16px 0}
  .stickybuy{display:flex;position:fixed;left:0;right:0;bottom:0;z-index:20;align-items:center;justify-content:space-between;gap:12px;background:rgba(255,255,255,.96);border-top:1px solid var(--line);box-shadow:0 -6px 20px rgba(15,40,90,.08);padding:10px max(16px,env(safe-area-inset-right,0px)) calc(10px + env(safe-area-inset-bottom,0px)) max(16px,env(safe-area-inset-left,0px))}
  .stickybuy .btn{flex:1;max-width:220px}
  .stickybuy .p{display:flex;flex-direction:column;line-height:1.1}
  .stickybuy .p s{color:var(--muted);font-size:.8125rem}
  .stickybuy .p b{font-size:1.375rem;font-weight:800}
  #s-sales{padding-bottom:72px}
  .cc .cover.off{aspect-ratio:16/6}
  .btn{min-height:46px}
  .les{padding:10px 8px}
  .center{padding-bottom:24px}
}
footer{margin-top:64px;padding-top:20px;border-top:1px solid var(--line);color:var(--muted);font-size:.875rem}

/* lesson player */
a.les{text-decoration:none}
.player.yt{display:block;position:relative;background:#000;padding:0;overflow:hidden}
.player.yt>#ytplayer,.player.yt iframe{position:absolute;inset:0;width:100%;height:100%;border:0}
.player.yt:fullscreen{aspect-ratio:auto;border-radius:0}
.player.yt>.poster{position:absolute;inset:0;z-index:3;background:#EAF1FD url(/assets/cover.jpg) center/cover no-repeat;display:grid;place-items:center;cursor:pointer;transition:opacity .2s}
.poster.gone{opacity:0;pointer-events:none}
.poster .playbtn{margin:0}
.player.yt>.shield{position:absolute;inset:0 0 48px 0;z-index:2;cursor:pointer}
.player.yt>.pc{position:absolute;left:0;right:0;bottom:0;z-index:4;display:flex;align-items:center;gap:10px;padding:8px 12px;background:linear-gradient(to top,rgba(8,16,34,.88),rgba(8,16,34,.55));color:#fff;font-size:.8125rem;font-variant-numeric:tabular-nums}
.pc button{background:none;border:0;color:#fff;cursor:pointer;font-size:1rem;min-width:34px;min-height:34px;border-radius:6px}
.pc button:hover{background:rgba(255,255,255,.16)}
.pc input[type=range]{flex:1;min-width:0;accent-color:#fff;height:20px}
@media(max-width:520px){.pc{gap:6px;padding:6px 8px}.pc .tm{font-size:.75rem}}
.player.yt.pfs{position:fixed;inset:0;z-index:9999;width:100%;height:100%;max-width:none;aspect-ratio:auto;border-radius:0;border:0}body.pfs-lock{overflow:hidden}.player.yt.pfs .pc{padding-bottom:max(8px,env(safe-area-inset-bottom,0px))};