/* Layout: 舞台袖の暗がりに、譜面のスティッキング(R L R R)を一本の拍として通す。左に言葉、右に写真。 */
:root{
  --ink:#0f1413;        /* 照明の落ちたステージ */
  --shell:#17221f;      /* シェルのグリーン(写真のドラム) */
  --line:#2a3632;
  --paper:#ebe5d6;      /* 本文 */
  --mute:#929a91;
  --bronze:#c49a52;     /* シンバルのブロンズ */
  --bronze-dim:#7d6436;
  --f-display:"Shippori Mincho B1","Hiragino Mincho ProN","Yu Mincho",serif;
  --f-body:"Zen Kaku Gothic New","Hiragino Sans","Yu Gothic",system-ui,sans-serif;
  --f-mono:"JetBrains Mono",ui-monospace,"SFMono-Regular",Menlo,monospace;
  --wrap:1120px;
  color-scheme:dark;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{background:var(--ink);color:var(--paper);font-family:var(--f-body);font-size:16px;line-height:1.85;letter-spacing:.02em;-webkit-font-smoothing:antialiased}
body::before{content:"";position:fixed;inset:0 0 auto;height:env(safe-area-inset-top,0px);z-index:10;background:var(--ink)}
a{color:inherit}
a:focus-visible,button:focus-visible{outline:2px solid var(--bronze);outline-offset:3px}
.wrap{max-width:var(--wrap);margin:0 auto;padding-left:max(20px,env(safe-area-inset-left,0px));padding-right:max(20px,env(safe-area-inset-right,0px))}
.mono{font-family:var(--f-mono)}
.draft{display:inline-block;font-family:var(--f-mono);font-size:11px;letter-spacing:.08em;color:var(--ink);background:var(--bronze);padding:0 6px;border-radius:2px;vertical-align:middle;margin-left:6px;line-height:1.7}

/* header */
header.top{position:sticky;top:env(safe-area-inset-top,0px);z-index:9;background:color-mix(in srgb,var(--ink) 88%,transparent);backdrop-filter:blur(8px);border-bottom:1px solid var(--line)}
header.top .wrap{display:flex;align-items:center;justify-content:space-between;gap:16px;padding-block:14px}
.logo{display:flex;align-items:baseline;gap:10px;text-decoration:none}
.logo b{font-family:var(--f-display);font-weight:800;font-size:22px;letter-spacing:.12em}
.logo span{font-family:var(--f-mono);font-size:11px;color:var(--mute);letter-spacing:.14em}
nav.gnav{display:flex;gap:22px;font-size:13px;letter-spacing:.12em}
nav.gnav a{text-decoration:none;color:var(--mute)}
nav.gnav a:hover{color:var(--paper)}
.btn{display:inline-flex;align-items:center;gap:10px;text-decoration:none;font-weight:700;font-size:14px;letter-spacing:.1em;padding:12px 22px;border:1px solid var(--bronze);color:var(--ink);background:var(--bronze);transition:background .2s,color .2s}
.btn:hover{background:transparent;color:var(--bronze)}
.btn.ghost{background:transparent;color:var(--paper);border-color:var(--line)}
.btn.ghost:hover{border-color:var(--bronze);color:var(--bronze)}
header.top .btn{padding:8px 16px;font-size:13px}
@media (max-width:860px){nav.gnav{display:none}}

/* hero */
.hero .wrap{display:grid;grid-template-columns:1.05fr .95fr;gap:56px;align-items:end;padding-block:72px 40px}
.eyebrow{font-family:var(--f-mono);font-size:12px;letter-spacing:.2em;color:var(--bronze);text-transform:uppercase}
.name{margin:18px 0 0;font-family:var(--f-display);font-weight:800;line-height:1.05;letter-spacing:.06em}
.name .nick{display:block;font-size:clamp(20px,2.4vw,26px);font-weight:500;color:var(--bronze);letter-spacing:.3em;margin-bottom:10px}
.name .full{display:block;font-size:clamp(64px,10vw,124px)}
.name .roman{display:block;font-family:var(--f-mono);font-weight:400;font-size:13px;letter-spacing:.32em;color:var(--mute);margin-top:18px}
.lead{margin:32px 0 0;font-size:clamp(17px,1.8vw,20px);line-height:1.9;max-width:30em;text-wrap:balance}
.facts{list-style:none;padding:0;margin:36px 0 0;display:grid;grid-template-columns:repeat(3,minmax(0,1fr));border-top:1px solid var(--line)}
.facts li{padding:16px 16px 0 0;min-width:0}
.facts li+li{padding-left:16px;border-left:1px solid var(--line)}
.facts .y{font-family:var(--f-mono);font-size:22px;font-weight:600;color:var(--paper);font-variant-numeric:tabular-nums;display:block}
.facts .t{font-size:13px;color:var(--mute);line-height:1.6;display:block;margin-top:4px}
.cta-row{display:flex;flex-wrap:wrap;gap:12px;margin-top:36px}
.hero figure{margin:0;position:relative}
.hero figure img{display:block;width:100%;aspect-ratio:4/5;object-fit:cover;object-position:42% 30%;filter:saturate(.85) contrast(1.05)}
.hero figure::after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,transparent 55%,var(--ink));pointer-events:none}

/* sticking line */
.sticking{border-block:1px solid var(--line);background:var(--shell);overflow:hidden}
.sticking .wrap{display:flex;align-items:center;gap:28px;padding-block:18px}
.sticking .label{font-family:var(--f-mono);font-size:11px;letter-spacing:.18em;color:var(--mute);white-space:nowrap}
.sticking ol{list-style:none;margin:0;padding:0;display:flex;gap:clamp(10px,2.4vw,30px);font-family:var(--f-mono);font-weight:600;font-size:clamp(16px,2.2vw,22px);flex-wrap:wrap}
.sticking li{color:var(--bronze-dim);transition:color .08s}
.sticking li.acc{text-decoration:underline;text-underline-offset:6px;text-decoration-thickness:2px}
.sticking li.on{color:var(--bronze)}
@media (prefers-reduced-motion:no-preference){.sticking li.hit{color:var(--paper)}}

/* sections */
section.block{padding-block:96px}
section.block+section.block{border-top:1px solid var(--line)}
.sec-head{display:grid;grid-template-columns:220px 1fr;gap:40px;margin-bottom:48px}
.sec-head h2{margin:0;font-family:var(--f-display);font-weight:700;font-size:clamp(30px,4vw,44px);line-height:1.25;letter-spacing:.08em;text-wrap:balance}
.sec-head p{margin:0;color:var(--mute);max-width:36em;align-self:end}
.sec-body{display:grid;grid-template-columns:220px 1fr;gap:40px}
.sec-body>*{min-width:0}
@media (max-width:860px){
  .hero .wrap{grid-template-columns:1fr;gap:32px;padding-block:40px 32px}
  .hero figure{order:-1}
  .hero figure img{aspect-ratio:4/3}
  .sec-head,.sec-body{grid-template-columns:1fr;gap:16px}
  section.block{padding-block:64px}
}
@media (max-width:520px){
  .facts{grid-template-columns:1fr}
  .facts li+li{padding-left:0;border-left:0;border-top:1px solid var(--line);margin-top:14px}
}

/* profile */
.bio p{margin:0 0 1.2em;max-width:38em}
.timeline{list-style:none;margin:40px 0 0;padding:0;border-top:1px solid var(--line)}
.timeline li{display:grid;grid-template-columns:96px 1fr;gap:20px;padding:14px 0;border-bottom:1px solid var(--line)}
.timeline .yr{font-family:var(--f-mono);color:var(--bronze);font-variant-numeric:tabular-nums}

/* lessons */
.who{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:1px;background:var(--line);border:1px solid var(--line);margin-bottom:56px}
.who div{background:var(--ink);padding:24px}
.who h3{margin:0 0 8px;font-size:17px;font-weight:700}
.who p{margin:0;font-size:14px;color:var(--mute);line-height:1.75}
.private{border:1px solid var(--bronze-dim);padding:36px;display:grid;grid-template-columns:1fr auto;gap:28px 48px;align-items:start;margin-bottom:56px;background:linear-gradient(135deg,var(--shell),var(--ink) 70%)}
.private h3{margin:0;font-family:var(--f-display);font-size:26px;letter-spacing:.06em}
.private .price{font-family:var(--f-mono);text-align:right;white-space:nowrap}
.private .price b{display:block;font-size:34px;color:var(--bronze);font-weight:600}
.private .price span{font-size:12px;color:var(--mute)}
.private ul{margin:0;padding-left:1.1em;grid-column:1/-1;columns:2;column-gap:48px}
.private li{margin-bottom:6px;break-inside:avoid}
.steps{grid-column:1/-1;list-style:none;margin:0;padding:0;display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px;counter-reset:s}
.steps li{border-top:1px solid var(--line);padding-top:12px;font-size:14px;counter-increment:s}
.steps li::before{content:"0" counter(s);font-family:var(--f-mono);color:var(--bronze);display:block;font-size:12px;letter-spacing:.1em}
.note{grid-column:1/-1;font-size:13px;color:var(--mute);margin:0}
.venues{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px}
.venue{border-top:2px solid var(--line);padding-top:18px;min-width:0}
.venue .area{font-family:var(--f-mono);font-size:11px;letter-spacing:.16em;color:var(--bronze)}
.venue h4{margin:6px 0 10px;font-size:17px}
.venue dl{margin:0;font-size:14px;display:grid;grid-template-columns:4.5em 1fr;gap:4px 10px}
.venue dt{color:var(--mute)}
.venue dd{margin:0;min-width:0;overflow-wrap:anywhere}
.venue a{font-size:13px;color:var(--bronze)}
@media (max-width:860px){
  .who,.venues,.steps{grid-template-columns:1fr}
  .private{grid-template-columns:1fr;padding:24px}
  .private .price{text-align:left}
  .private ul{columns:1}
}

/* pupils */
.pupil{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:24px}
.pupil article{border:1px solid var(--line);padding:28px}
.pupil h3{margin:0;font-size:20px;font-family:var(--f-display)}
.pupil .role{font-size:13px;color:var(--mute);margin:4px 0 14px}
.pupil blockquote{margin:0;padding-left:14px;border-left:2px solid var(--bronze);font-size:14px}
.pupil cite{display:block;margin-top:12px;font-style:normal;font-size:12px;color:var(--mute)}
.pupil article.slot{border-style:dashed;color:var(--mute);display:flex;align-items:center;justify-content:center;text-align:center;font-size:14px}
@media (max-width:860px){.pupil{grid-template-columns:1fr}}

/* books */
.books{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:24px}
.book{display:grid;grid-template-columns:120px 1fr;gap:24px;border:1px solid var(--line);padding:24px;min-width:0}
.cover{aspect-ratio:210/297;background:var(--paper);color:var(--ink);padding:12px 10px;display:flex;flex-direction:column;justify-content:space-between}
.cover .s{font-family:var(--f-mono);font-size:8px;letter-spacing:.12em}
.cover .t{font-family:var(--f-display);font-weight:800;font-size:15px;line-height:1.3}
.cover .r{font-family:var(--f-mono);font-size:9px;letter-spacing:.06em;border-top:1px solid var(--ink);padding-top:4px}
.book h3{margin:0 0 4px;font-size:18px}
.book .meta{font-family:var(--f-mono);font-size:12px;color:var(--mute);margin:0 0 12px}
.book p{margin:0 0 12px;font-size:14px}
.book a{font-size:13px;color:var(--bronze)}
@media (max-width:860px){.books{grid-template-columns:1fr}}
@media (max-width:420px){.book{grid-template-columns:1fr}.cover{max-width:140px}}

/* stage band */
.band{position:relative;border-block:1px solid var(--line)}
.band img{display:block;width:100%;height:clamp(200px,28vw,320px);object-fit:cover;object-position:60% 40%;filter:saturate(.8)}
.band::after{content:"";position:absolute;inset:0;background:linear-gradient(90deg,var(--ink) 0%,transparent 45%)}
.band .cap{position:absolute;left:0;right:0;bottom:24px;z-index:1}
.band .cap p{margin:0;font-family:var(--f-display);font-size:clamp(20px,3vw,32px);font-weight:700;letter-spacing:.08em;max-width:16em}

/* works */
.works{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:56px}
.works h3{margin:0 0 14px;font-size:13px;letter-spacing:.18em;color:var(--bronze);font-family:var(--f-mono);font-weight:400}
.list{list-style:none;margin:0;padding:0;border-top:1px solid var(--line)}
.list li{border-bottom:1px solid var(--line);padding:12px 0;display:flex;justify-content:space-between;gap:16px;font-size:15px}
.list li span{color:var(--mute);font-size:13px;text-align:right}
.list a{text-decoration:none}
.list a:hover{color:var(--bronze)}
.schedule{margin-top:56px;border:1px dashed var(--line);padding:28px;display:flex;justify-content:space-between;gap:24px;flex-wrap:wrap;align-items:center}
.schedule p{margin:0;color:var(--mute);font-size:14px}
@media (max-width:860px){.works{grid-template-columns:1fr;gap:40px}}

/* faq */
.faq details{border-bottom:1px solid var(--line)}
.faq details:first-child{border-top:1px solid var(--line)}
.faq summary{cursor:pointer;list-style:none;padding:20px 32px 20px 0;font-weight:700;position:relative}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";position:absolute;right:4px;top:18px;font-family:var(--f-mono);color:var(--bronze);font-size:20px}
.faq details[open] summary::after{content:"−"}
.faq details p{margin:0 0 20px;color:var(--mute);max-width:40em}

/* contact */
.contact{background:var(--shell)}
.contact .box{border:1px solid var(--bronze-dim);padding:40px;display:grid;grid-template-columns:1fr auto;gap:24px 40px;align-items:center}
.addr{font-family:var(--f-mono);font-size:clamp(18px,2.6vw,28px);color:var(--paper);overflow-wrap:anywhere;user-select:all}
.copy{font:inherit;font-size:13px;letter-spacing:.1em;cursor:pointer}
.tpl{grid-column:1/-1;margin:0;font-size:14px;color:var(--mute)}
.tpl code{font-family:var(--f-mono);color:var(--paper);font-size:13px}
.sns{display:flex;gap:24px;margin-top:32px;font-size:14px;flex-wrap:wrap}
.sns a{color:var(--mute);text-decoration:none;border-bottom:1px solid var(--line)}
.sns a:hover{color:var(--bronze)}
@media (max-width:860px){.contact .box{grid-template-columns:1fr;padding:24px}}

.private .school{grid-column:1/-1;margin:0;font-size:14px;display:grid;grid-template-columns:5em 1fr;gap:4px 12px;border-top:1px solid var(--line);padding-top:16px}
.private .school dt{color:var(--mute)}
.private .school dd{margin:0;min-width:0}
h3.sub{margin:0 0 20px;font-size:13px;letter-spacing:.18em;color:var(--mute);font-weight:400}
.book .buy{display:flex;flex-wrap:wrap;gap:8px 20px}
.contact .box.trial{border-color:var(--bronze);background:var(--ink)}
.trial-lead{margin:8px 0 6px;font-family:var(--f-display);font-weight:700;font-size:clamp(20px,2.6vw,26px);letter-spacing:.06em}
footer{padding-block:40px;font-size:12px;color:var(--mute)}
footer .wrap{display:flex;justify-content:space-between;flex-wrap:wrap;gap:12px}
footer a{color:var(--mute)}

/* video (production) */
.vids{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px}
.yt{all:unset;cursor:pointer;display:block;position:relative;background:var(--shell);border:1px solid var(--line);min-width:0}
.yt img{display:block;width:100%;aspect-ratio:16/9;object-fit:cover;filter:saturate(.8) brightness(.85)}
.yt::after{content:"";position:absolute;left:14px;top:14px;width:0;height:0;border-style:solid;border-width:9px 0 9px 15px;border-color:transparent transparent transparent var(--bronze)}
.yt:hover img{filter:none}
.yt:focus-visible{outline:2px solid var(--bronze);outline-offset:3px}
.yt-t{display:block;padding:10px 12px;font-size:13px;line-height:1.5}
.yt-t small{display:block;color:var(--mute);font-size:11px}
.yt iframe{display:block;width:100%;aspect-ratio:16/9;border:0}
.chan{margin:16px 0 0;font-size:14px}.chan a{color:var(--bronze)}
@media (max-width:520px){.vids{grid-template-columns:1fr}}
.bio h3{margin:2em 0 .4em;font-size:16px;color:var(--bronze);letter-spacing:.08em}
.logo b,header.top .btn{white-space:nowrap}
@media (max-width:860px){.sec-head>div:empty,.sec-body>div:empty{display:none}}
@media (max-width:520px){.logo span{display:none}header.top .btn{padding:8px 12px;font-size:12px;letter-spacing:.04em}}
.hero figure img,.yt img{height:auto}

.book ul.feat{margin:0 0 12px;padding-left:1.1em;font-size:14px}
.book ul.feat li{margin-bottom:4px}
.order-steps{list-style:none;margin:0;padding:0;counter-reset:o;border-top:1px solid var(--line)}
.order-steps li{counter-increment:o;display:grid;grid-template-columns:3em 1fr;gap:0 12px;padding:16px 0;border-bottom:1px solid var(--line)}
.order-steps li::before{content:counter(o,decimal-leading-zero);font-family:var(--f-mono);color:var(--bronze);grid-row:span 2}
.order-steps b{font-weight:700}
.order-steps span{color:var(--mute);font-size:14px}
.book img.cover-img{display:block;width:100%;height:auto;aspect-ratio:320/452;box-shadow:0 8px 24px rgba(0,0,0,.45)}

.summary{margin:0 0 40px;padding:24px 28px;border:1px solid var(--line);background:var(--shell)}
.summary .def{margin:0 0 16px;max-width:none}
.facts-table{margin:0;display:grid;grid-template-columns:5em 1fr;gap:8px 16px;font-size:14px}
.facts-table dt{color:var(--bronze);font-family:var(--f-mono);font-size:12px;letter-spacing:.1em;padding-top:2px}
.facts-table dd{margin:0;min-width:0}
@media (max-width:520px){.summary{padding:20px}.facts-table{grid-template-columns:1fr;gap:0}.facts-table dd{margin-bottom:10px}}
.pupil .plink{margin:14px 0 0;font-size:13px}.pupil .plink a{color:var(--bronze)}