:root{
    --ink:#2b2620;
    --paper:#f7f4ec;
    --paper-deep:#efe9da;
    --indigo:#2c4a5e;
    --indigo-deep:#1d3340;
    --clay:#b5562c;
    --clay-soft:#e8c9b4;
    --line:#d8cfb8;
    --max:920px;
  }

  *{box-sizing:border-box;}
  html{scroll-behavior:smooth;}

  body{
    margin:0;
    background:var(--paper);
    color:var(--ink);
    font-family:'Noto Sans JP',sans-serif;
    line-height:1.9;
    letter-spacing:.02em;
    -webkit-font-smoothing:antialiased;
  }

  h1,h2,h3,.eyebrow{
    font-family:'Shippori Mincho',serif;
  }

  a{color:var(--indigo);}

  /* ===== Header / Hero ===== */
  .hero{
    position:relative;
    padding:28px 24px 36px;
    border-bottom:1px solid var(--line);
    overflow:hidden;
    max-width: var(--max);
    margin: 0 auto;
  }
  .hero::before{
    content:"";
    position:absolute;
    right: 0px; top:-60px;
    width:280px; height:280px;
    border:3px solid var(--indigo);
    opacity: 0.05;
    border-radius:50%;
  }
  .hero::after{
    content:"";
    position:absolute;
    right:90px; top:40px;
    width:160px; height:160px;
    border:1px solid var(--clay);
    opacity: 0.1;
    border-radius:50%;
  }
  .hero-inner{
    max-width:var(--max);
    margin:0 auto;
    position:relative;
  }
  .hero h1{
    font-size:clamp(2.1rem, 5vw, 3rem);
    font-weight:700;
    line-height:1.5;
    margin:0 0 14px;
    color:var(--indigo-deep);
  }
  .hero p.lead{
    font-size:1.02rem;
    color:#5a5446;
    width:95%;
    margin:0 auto;
  }
  .hero .contact-strip{
    margin-top:32px;
    display:flex;
    flex-wrap:wrap;
    gap:10px 28px;
    font-size:.92rem;
    color:#5a5446;
  }
  .hero .contact-strip strong{color:var(--indigo-deep);font-weight:500;}

  /* ===== Nav (table of contents) ===== */
  .toc-wrap{
    position:sticky;
    top:0;
    z-index:50;
    background:rgba(247,244,236,.92);
    backdrop-filter:blur(6px);
    border-bottom:1px solid var(--line);
  }
  .toc{
    max-width:var(--max);
    margin:0 auto;
    padding:14px 24px;
    display:flex;
    gap:15px;
    overflow-x:auto;
    scrollbar-width:none;
  }
  .toc::-webkit-scrollbar{display:none;}
  .toc a{
    flex:0 0 auto;
    text-decoration:none;
    color:var(--indigo-deep);
    font-size:.86rem;
    padding:7px 24px;
    border:1px solid var(--line);
    border-radius:999px;
    white-space:nowrap;
    transition:background .15s ease, color .15s ease, border-color .15s ease;
  }
  .toc a:hover, .toc a:focus-visible{
    background:var(--indigo);
    color:#fff;
    border-color:var(--indigo);
  }

  /* ===== Main layout ===== */
  main{
    max-width:var(--max);
    margin:0 auto;
    padding:8px 24px 50px;
  }

  .container{
    max-width:var(--max);
    margin: 20px auto;
    border:#1d3340 1px solid;
    border-radius: 20px;
    background:var(--paper-deep);
    padding: 0 30px;
  }
  .container-head {
    font-family:'Shippori Mincho',serif;
    font-size:1.8rem;
    font-weight:700;
    color:var(--indigo-deep);
    padding-top: 20px;
    margin-bottom: -30px;
  }

  section{
    padding:40px 0 10px;
    border-top:1px solid var(--line);
    scroll-margin-top:78px;
  }
  section:first-of-type{border-top:none;}

  .section-head{
    display:flex;
    align-items:baseline;
    gap:18px;
    margin-bottom:28px;
  }
  .section-num{
    font-family:'Shippori Mincho',serif;
    font-size:1.05rem;
    font-weight:700;
    color:#fff;
    background:var(--indigo);
    width:30px;height:30px;
    flex:0 0 auto;
    border-radius:50%;
    display:flex;align-items:center;justify-content:center;
  }
  h2{
    font-size:1.2rem;
    font-weight:700;
    color:var(--indigo-deep);
    margin:0;
  }
  /* h2 .sub{
    display:block;
    font-family:'Noto Sans JP',sans-serif;
    font-size:.78rem;
    font-weight:500;
    letter-spacing:.18em;
    color:var(--clay);
    margin-bottom:4px;
  } */

  h3{
    font-size:1.04rem;
    font-weight:700;
    color:var(--indigo-deep);
    margin:34px 0 14px;
    padding-left:14px;
    border-left:4px solid var(--clay);
  }
  section > h3:first-of-type{margin-top:0;}

  /* info list */
  ul.plain{
    list-style:none;
    margin:0 0 8px;
    padding:0;
  }
  ul.plain > li{
    position:relative;
    padding:10px 0 10px 22px;
    border-bottom:1px dashed var(--line);
  }
  ul.plain > li:last-child{border-bottom:none;}
  ul.plain > li::before{
    content:"・";
    position:absolute;
    left:0;
    color:var(--clay);
  }
  ul.plain .label{
    display:inline-block;
    min-width:9em;
    font-weight:700;
    color:var(--indigo-deep);
  }
  .note{
    font-size:.88rem;
    color:var(--indigo-deep);
    margin-top:4px;
    margin-left: 2rem;
  }

  /* definition style rows (hours table) */
  .fact-table{
    width:100%;
    border-collapse:collapse;
    margin:6px 0 20px;
    font-size:.96rem;
  }
  .fact-table th, .fact-table td{
    text-align:left;
    padding:13px 4px;
    border-bottom:1px solid var(--line);
    vertical-align:top;
  }
  .fact-table th{
    width:9em;
    color:var(--indigo-deep);
    font-weight:700;
    white-space:nowrap;
  }

  /* callout box */
  .box{
    background:var(--paper-deep);
    border:1px solid var(--line);
    border-radius:10px;
    padding:20px 0 10px 20px;
    margin:18px 0 28px;
  }
  .box h4{
    margin:0;
    font-size:.92rem;
    color:var(--indigo-deep);
    font-weight:700;
    display:flex;
    align-items:center;
    gap:8px;
  }
  .box h4::before{
    content:"";
    width:7px;height:7px;
    border-radius:50%;
    background:var(--clay);
  }
  .box ul.plain{margin:0;}

  .box.warn{
    background:#f4e7df;
    border-color:var(--clay-soft);
  }
  .box.warn h4::before{background:var(--indigo);}

  /* steps (当日の受付・流れ) */
  .steps{
    counter-reset:step;
    list-style:none;
    margin:6px 0 24px;
    padding:0;
    display:grid;
    gap:14px;
  }
  .steps li{
    counter-increment:step;
    position:relative;
    padding:16px 18px 16px 58px;
    background:var(--paper);
    border:1px solid var(--line);
    border-radius:10px;
  }
  .steps li::before{
    content:counter(step);
    position:absolute;
    left:16px; top:18px;
    width:24px;height:24px;
    border-radius:50%;
    border:1px solid var(--indigo);
    color:var(--indigo);
    font-family:'Shippori Mincho',serif;
    font-size:.92rem;
    display:flex;align-items:center;justify-content:center;
  }

  /* checklist style for 入館にあたっての諸注意 */
  .check-grid{
    display:grid;
    grid-template-columns:repeat(2,1fr);
    gap:14px;
    margin:6px 0 24px;
  }
  .check-grid li{
    list-style:none;
    background:var(--paper);
    border:1px solid var(--line);
    border-left:4px solid var(--indigo);
    border-radius:6px;
    padding:14px 16px;
    font-size:.95rem;
  }
  @media (max-width:640px){
    .check-grid{grid-template-columns:1fr;}
  }

  /* footer / contact */
  footer{
    background:var(--paper-deep);
    color:var(--indigo-deep);
    padding:24px;
    margin-top:10px;
  }
  .footer-inner{
    max-width:var(--max);
    margin:0 auto;
  }
  footer h2{
    color:var(--indigo-deep);
    font-size:1.3rem;
  }
  /* footer .section-num{
    background:var(--clay);
  } */
  .footer-grid{
    margin: 26px 20px 0 20px;
    display:grid;
    grid-template-columns:1.8fr 1fr;
    gap:32px;
    font-size:.94rem;
  }
  @media (max-width:640px){
    .footer-grid{grid-template-columns:1fr;}
  }
  .footer-grid dt{
    color:var(--indigo-deep);
    font-size:.8rem;
    letter-spacing:.1em;margin-bottom:0;
}
  .footer-grid dd{
    margin-bottom:10px;
    color:var(--indigo-deep);
}
  .footer-grid a{
    color:var(--indigo-deep);text-decoration:underline;text-underline-offset:3px;
}

  /* focus visibility */
  a:focus-visible, button:focus-visible{
    outline:3px solid var(--clay);
    outline-offset:2px;
  }

  @media (prefers-reduced-motion: reduce){
    html{scroll-behavior:auto;}
  }

  @media print{
    .toc-wrap{display:none;}
    .hero::before,.hero::after{display:none;}
    section{break-inside:avoid;}
  }