:root { --paper:#f7f1e8; --ink:#322b27; --brown:#5a4032; --line:#cdbfb2; }
    * { box-sizing:border-box; }
    html { scroll-behavior:smooth; }
    body { margin:0; color:var(--ink); background:var(--paper); font-family:"Yu Mincho","Hiragino Mincho ProN","Noto Serif CJK JP",serif; }
    .wrap { width:min(1200px, calc(100% - 96px)); margin:auto; }
    header { height:78px; position:absolute; top:0; left:0; right:0; z-index:10; background:transparent; }
    header .wrap { height:100%; display:flex; align-items:center; justify-content:flex-end; position:relative; z-index:1; }
    nav { display:flex; gap:38px; font-family:Georgia,serif; font-size:13px; letter-spacing:.1em; color:var(--ink); }
    a { color:inherit; text-decoration:none; }
    .menu { display:none; width:32px; height:32px; padding:0; border:0; background:transparent; cursor:pointer; position:relative; }
    .menu:before,.menu:after,.menu span { content:""; position:absolute; left:2px; width:28px; border-top:2px solid var(--brown); transition:transform .25s,top .25s,opacity .25s; }
    .menu:before { top:7px; }
    .menu span { top:15px; }
    .menu:after { top:23px; }
    .menu[aria-expanded="true"]:before { top:15px; transform:rotate(45deg); }
    .menu[aria-expanded="true"] span { opacity:0; }
    .menu[aria-expanded="true"]:after { top:15px; transform:rotate(-45deg); }
    .hero { height:540px; position:relative; background:#f7f1e8 url('assets/hero-pc.webp') center 45%/cover no-repeat; color:#fff9f0; }
    .hero:before { content:""; position:absolute; inset:0; background:linear-gradient(180deg,rgba(47,31,25,0) 0%,rgba(47,31,25,.05) 44%,rgba(47,31,25,.72) 100%); }
    .hero .wrap { position:relative; height:100%; display:flex; flex-direction:column; justify-content:flex-end; align-items:flex-end; padding-bottom:55px; }
    .hero-name { text-align:right; text-shadow:0 2px 12px rgba(36,22,18,.22); }
    .hero-name .roman { font:400 48px/1.12 Georgia,serif; letter-spacing:.13em; margin:0 0 15px; }
    .hero-name .roman span { display:block; }
    .hero-name .ja { font-size:24px; font-weight:400; letter-spacing:.12em; line-height:1.5; margin:0; }
    main { background:var(--paper); }
    section { padding:82px 0 0; }
    section:last-child { padding-bottom:94px; }
    h2 { margin:0 0 14px; font:400 38px Georgia,serif; letter-spacing:.045em; }
    .section-sub { display:flex; gap:14px; align-items:center; font-size:13px; letter-spacing:.08em; margin:0 0 27px; }
    .section-sub:before { content:""; display:block; width:42px; border-top:1px solid #a69282; }
    .profile-grid { display:grid; grid-template-columns:440px 1fr; gap:68px; align-items:center; }
    .profile-grid img { width:100%; height:auto; aspect-ratio:4/5; object-fit:cover; object-position:center top; display:block; }
    .profile-copy h3 { font-size:26px; font-weight:400; letter-spacing:.14em; margin:0 0 3px; }
    .profile-copy .roman { font:13px Georgia,serif; letter-spacing:.24em; margin:0 0 32px; }
    .profile-copy p { font-size:17px; line-height:2.05; letter-spacing:.05em; margin:0; }
    .concert-grid { display:grid; grid-template-columns:440px 1fr; gap:68px; align-items:start; }
    .flyer { width:100%; }
    .flyer img { display:block; width:100%; height:auto; }
    .flyer a { display:block; cursor:zoom-in; }
    .flyer a + a { margin-top:20px; }
    .concert-title { font-size:24px; font-weight:400; letter-spacing:.08em; margin:0 0 18px; }
    .concert-detail { border-top:1px solid var(--line); display:grid; grid-template-columns:116px 1fr; gap:20px; padding:17px 0; font-size:16px; line-height:1.75; }
    .concert-detail:last-child { border-bottom:1px solid var(--line); }
    .concert-detail b { font-weight:400; letter-spacing:.12em; }
    .past-concerts { margin-top:42px; }
    .past-concerts > h3 { margin:0 0 26px; font-size:23px; font-weight:400; letter-spacing:.08em; }
    .past-concert-content { display:flex; gap:26px; overflow-x:auto; scroll-snap-type:x mandatory; scrollbar-width:none; }
    .past-concert-content::-webkit-scrollbar { display:none; }
    .past-concert-content img { display:block; flex:0 0 calc((100% - 52px)/3); width:calc((100% - 52px)/3); height:auto; scroll-snap-align:start; }
    .past-concert-controls { display:flex; justify-content:center; gap:20px; margin-top:21px; }
    .past-concert-controls > button { width:40px; height:40px; border:1px solid var(--line); background:transparent; color:var(--brown); font:24px Georgia,serif; cursor:pointer; }
    .past-concert-controls > button:disabled { opacity:.35; cursor:default; }
    .past-dots { display:flex; gap:10px; align-items:center; }
    .past-dot { width:7px; height:7px; border:0; border-radius:50%; background:#c9b7a8; padding:0; cursor:pointer; }
    .past-dot[aria-current="true"] { background:var(--brown); transform:scale(1.25); }
    .lesson-panel { min-height:400px; display:flex; flex-direction:column; padding:36px 40px 43px; background:#ede1d4; }
    .lesson-panel h2 { font-size:48px; margin-bottom:8px; }
    .lesson-panel .section-sub { margin-bottom:28px; color:var(--brown); }
    .lesson-panel .section-sub:before { display:none; }
    .lesson-copy { border-top:1px solid #baa997; padding-top:25px; }
    .lesson-copy p { max-width:800px; margin:0; line-height:1.8; letter-spacing:.04em; }
    .lesson-intro { font-size:21px; }
    .lesson-copy .lesson-location { font-size:18px; margin-top:21px; }
    .lesson-school { width:340px; margin:auto 0 0 auto; padding:12px 22px; background:var(--brown); color:#fff9f0; }
    .lesson-school:hover,.lesson-school:focus-visible { background:#735544; }
    .lesson-school-name,.lesson-school-action { display:block; }
    .lesson-school-name { font-size:17px; letter-spacing:.08em; }
    .lesson-school-action { margin-top:5px; font-size:14px; letter-spacing:.05em; }
    footer { background:#3d3029; color:#fff6ed; text-align:center; padding:27px 12px; font:12px Georgia,serif; letter-spacing:.08em; }
    @media (max-width:700px) {
      .wrap { width:calc(100% - 38px); }
      header { height:64px; }
      nav { display:none; position:absolute; top:100%; left:0; right:0; background:rgba(250,245,238,.97); padding:16px 20px 23px; box-shadow:0 12px 20px rgba(49,35,27,.13); flex-direction:column; gap:0; }
      nav.is-open { display:flex; }
      nav a { display:block; padding:13px 2px; border-bottom:1px solid var(--line); font-size:15px; }
      .menu { display:block; }
      .hero { height:450px; background-image:url('assets/hero-sp.webp'); background-position:center bottom; background-size:max(100%, 600px) auto; }
      .hero:before { display:none; }
      .hero .wrap { padding-bottom:32px; }
      .hero-name .roman { font-size:27px; letter-spacing:.09em; margin-bottom:9px; }
      .hero-name .ja { font-size:16px; letter-spacing:.06em; }
      section { padding-top:55px; }
      section:last-child { padding-bottom:63px; }
      h2 { font-size:30px; margin-bottom:2px; }
      .section-sub { font-size:11px; margin-bottom:22px; }
      .section-sub:before { width:29px; }
      .profile-grid,.concert-grid { display:block; }
      .profile-copy { padding-top:23px; }
      .profile-copy h3 { font-size:23px; text-align:center; }
      .profile-copy .roman { font-size:10px; text-align:center; margin-bottom:20px; }
      .profile-copy p { font-size:14px; line-height:1.95; }
      .concert-title { font-size:18px; margin:22px 0 11px; }
      .concert-detail { grid-template-columns:65px 1fr; gap:8px; padding:12px 0; font-size:12px; }
      .past-concerts { margin-top:30px; }
      .past-concerts > h3 { font-size:18px; margin-bottom:20px; }
      .past-concert-content { gap:16px; }
      .past-concert-content img { flex:0 0 74%; width:74%; scroll-snap-align:start; }
      .lesson-panel { min-height:0; padding:25px 23px 27px; }
      .lesson-panel h2 { font-size:36px; }
      .lesson-panel .section-sub { margin-bottom:23px; }
      .lesson-copy { padding-top:21px; }
      .lesson-intro { font-size:16px; }
      .lesson-copy .lesson-location { font-size:15px; margin-top:19px; }
      .lesson-school { width:100%; margin-top:29px; }
      footer { font-size:10px; padding:23px 10px; }
    }
    a:focus-visible, button:focus-visible, .past-concert-content:focus-visible {
      outline:3px solid #6b2d14;
      outline-offset:3px;
    }
    .past-dots { gap:4px; }
    .past-dot { width:24px; height:24px; background:transparent; position:relative; }
    .past-dot::after { content:""; position:absolute; width:7px; height:7px; border-radius:50%; background:#c9b7a8; top:50%; left:50%; transform:translate(-50%,-50%); }
    .past-dot[aria-current="true"] { background:transparent; transform:none; }
    .past-dot[aria-current="true"]::after { background:var(--brown); transform:translate(-50%,-50%) scale(1.25); }
    @media (prefers-reduced-motion:reduce) {
      html { scroll-behavior:auto; }
      .menu:before,.menu:after,.menu span { transition:none; }
    }
    .not-found { min-height:80vh; padding:80px 0; }