:root{
  --black:#0f1113;
  --ink:#17191a;
  --muted:#545b5b;
  --line:#d4d7d8;
  --paper:#f2f1ee;
  --paper2:#e7e6e3;
  --green:#4b5551;
  --rust:#7a544a;
  --white:#fff;
  --max:1080px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  color:var(--ink);
  background:
    radial-gradient(circle at 12% 8%, rgba(0,0,0,.035), transparent 28%),
    linear-gradient(90deg, rgba(0,0,0,.025) 1px, transparent 1px),
    linear-gradient(0deg, rgba(0,0,0,.022) 1px, transparent 1px),
    var(--paper);
  background-size:auto, 34px 34px, 34px 34px, auto;
  font-family:"Noto Serif JP","Yu Mincho","Hiragino Mincho ProN",serif;
  line-height:1.9;
  letter-spacing:.03em;
}
a{color:inherit;text-decoration:none}
.site-header{
  position:sticky;top:0;z-index:20;
  background:rgba(15,17,19,.94);
  color:#f2f1ee;
  border-bottom:1px solid rgba(255,255,255,.08);
  backdrop-filter: blur(8px);
}
.header-inner{max-width:var(--max);margin:0 auto;display:flex;align-items:center;justify-content:space-between;height:56px;padding:0 22px}
.brand{font-size:18px;letter-spacing:.18em;white-space:nowrap}
.nav{display:flex;gap:24px;font-size:13px;letter-spacing:.12em}
.nav a{opacity:.86}.nav a:hover{opacity:1}
.menu-btn{display:none;background:none;color:inherit;border:0;font-size:24px}
.hero{min-height:72vh;display:grid;align-items:end;position:relative;background:#101315;overflow:hidden}
.hero:before{content:"";position:absolute;inset:0;background:url('../img/hero-homecenter-user-final.png') center center/cover no-repeat;filter:none;opacity:1;transform:none}
.hero:after{content:none}
.hero-content{position:relative;z-index:1;max-width:var(--max);width:100%;margin:0 auto;padding:0 22px 58px;color:#f4f2ee}
.hero-title{font-size:clamp(42px,7vw,88px);font-weight:400;letter-spacing:.14em;line-height:1.1;margin:0 0 14px;text-shadow:0 4px 18px rgba(0,0,0,.55)}
.hero-copy{margin:0 0 22px;font-size:clamp(15px,1.8vw,22px);letter-spacing:.05em;text-shadow:0 3px 14px rgba(0,0,0,.55)}
.hero-actions{display:flex;gap:14px;flex-wrap:wrap}
.button{display:inline-flex;align-items:center;gap:10px;border:1px solid currentColor;padding:11px 18px;font-size:13px;letter-spacing:.14em;background:rgba(15,17,19,.58)}
.button:hover{background:rgba(15,17,19,.74)}
.main{max-width:var(--max);margin:0 auto;padding:64px 22px 96px}
.section-title{font-size:22px;font-weight:400;letter-spacing:.16em;border-bottom:1px solid var(--line);padding-bottom:16px;margin:0 0 28px}
.note-grid{display:grid;grid-template-columns:1fr 1fr;gap:26px;margin-top:32px}
.panel{border:1px solid var(--line);background:rgba(255,255,255,.3);padding:24px}
.panel h3{font-size:16px;font-weight:400;margin:0 0 10px;letter-spacing:.12em}.panel p{font-size:14px;color:var(--muted);margin:0}
.chapter-list{border-top:1px solid var(--line);margin:24px 0 48px}
.chapter-item{display:grid;grid-template-columns:72px 1fr auto;gap:18px;align-items:center;border-bottom:1px solid var(--line);padding:18px 0}
.chapter-no{font-family:serif;background:var(--black);color:var(--paper);width:42px;height:42px;display:grid;place-items:center;font-size:16px}
.chapter-item strong{display:block;font-size:19px;font-weight:400;letter-spacing:.12em}.chapter-item span{font-size:13px;color:var(--muted)}
.arrow{font-size:22px;color:var(--muted)}
.page-hero{position:relative;min-height:360px;display:flex;align-items:flex-end;background:#111;color:var(--paper);overflow:hidden}
.page-hero img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;filter:grayscale(1) contrast(1.05);opacity:.58}
.page-hero:after{content:"";position:absolute;inset:0;background:linear-gradient(0deg,rgba(0,0,0,.72),rgba(0,0,0,.08))}
.page-hero-inner{position:relative;z-index:1;max-width:var(--max);width:100%;margin:0 auto;padding:48px 22px}
.kicker{font-size:13px;color:rgba(255,255,255,.72);letter-spacing:.18em;margin-bottom:12px}
.page-title{font-size:clamp(34px,5vw,64px);font-weight:400;line-height:1.2;margin:0;letter-spacing:.16em}
.prose{max-width:760px;margin:0 auto;font-size:17px;line-height:2.25}
.prose p{margin:0 0 1.65em}
.prose p:first-child::first-letter{font-size:2.6em;float:left;line-height:1;padding:.12em .12em 0 0;color:#242829}
.chapter-nav{max-width:760px;margin:56px auto 0;border-top:1px solid var(--line);display:grid;grid-template-columns:1fr 1fr 1fr;gap:12px;padding-top:20px}
.chapter-nav a,.chapter-nav span{border:1px solid var(--line);padding:13px 14px;text-align:center;font-size:13px;background:rgba(255,255,255,.2)}
.chapter-nav .disabled{color:#9a9d9d}.chapter-nav .center{background:var(--black);color:var(--paper)}
.site-footer{background:var(--black);color:var(--paper);padding:36px 22px}.footer-inner{max-width:var(--max);margin:0 auto;display:flex;justify-content:space-between;gap:24px;font-size:12px;color:rgba(255,255,255,.72)}
.small{font-size:12px;color:var(--muted);letter-spacing:.05em}
@media(max-width:760px){
  body{line-height:1.85;letter-spacing:.02em}.header-inner{height:52px;padding:0 16px}.brand{font-size:15px}.menu-btn{display:block}.nav{position:fixed;top:52px;left:0;right:0;background:rgba(15,17,19,.98);display:none;flex-direction:column;padding:18px 22px;border-bottom:1px solid rgba(255,255,255,.08)}.nav.is-open{display:flex}.hero{min-height:76vh}.hero-content{padding:0 18px 56px}.hero-title{font-size:48px;letter-spacing:.13em}.hero-copy{font-size:17px;line-height:1.8}.main{padding:44px 18px 72px}.note-grid{grid-template-columns:1fr}.chapter-item{grid-template-columns:52px 1fr auto;gap:12px}.chapter-no{width:36px;height:36px}.page-hero{min-height:300px}.page-hero-inner{padding:38px 18px}.prose{font-size:16px;line-height:2.05}.chapter-nav{grid-template-columns:1fr}.footer-inner{display:block}.footer-inner div+div{margin-top:12px}
}


.contents-lead{font-size:14px;color:var(--muted);margin:-10px 0 28px}
.contents-part{margin:42px 0 18px;font-size:15px;font-weight:400;letter-spacing:.16em;color:var(--muted);border-bottom:1px solid var(--line);padding-bottom:8px}
.chapter-item.is-fragment{background:rgba(15,17,19,.035);padding-left:12px;padding-right:12px}
.chapter-item.is-fragment .chapter-no{background:var(--green)}
.chapter-item.is-disabled{opacity:.55;pointer-events:none}
.chapter-item small{display:block;font-size:12px;color:var(--muted);letter-spacing:.08em;margin-top:4px}

.hero-textblock{display:inline-block;background:rgba(0,0,0,.18);padding:18px 24px 18px 0;backdrop-filter:none}
@media(max-width:760px){.hero-textblock{background:rgba(0,0,0,.12);padding:10px 10px 10px 0}}


/* v1.1 compact contents adjustments */
.main{
  padding-top:48px;
}
.section-title{
  font-size:24px;
  margin-bottom:18px;
  padding-bottom:12px;
}
.contents-lead{
  margin:0 0 18px;
}
.contents-part{
  margin:30px 0 8px;
  padding-bottom:6px;
  font-size:24px;
  line-height:1.45;
  letter-spacing:.12em;
  color:var(--ink);
}
.chapter-list{
  margin:14px 0 34px;
}
.chapter-item{
  grid-template-columns:52px 1fr auto;
  gap:18px;
  padding:11px 0;
  min-height:58px;
}
.chapter-item.is-fragment{
  padding-left:12px;
  padding-right:12px;
  min-height:52px;
}
.chapter-no{
  width:42px;
  height:42px;
}
.chapter-item strong{
  font-size:18px;
  line-height:1.45;
}
.chapter-item span span,
.chapter-item small{
  display:none !important;
}
.hero-actions{
  display:none !important;
}
@media(max-width:760px){
  .main{padding-top:34px}
  .section-title{font-size:22px;margin-bottom:14px}
  .contents-part{font-size:21px;margin:26px 0 6px}
  .chapter-item{grid-template-columns:44px 1fr auto;padding:10px 0;gap:14px;min-height:54px}
  .chapter-no{width:34px;height:34px}
  .chapter-item strong{font-size:16px}
}


/* v1.2 footer / publication date */
.site-dates{
  color:rgba(255,255,255,.62);
  letter-spacing:.08em;
}
@media(max-width:760px){
  .site-dates{
    margin-top:8px;
  }
}


/* v1.3 full text package */
.contents-part{
  font-size:26px;
  line-height:1.4;
  margin:34px 0 8px;
}
.chapter-list{
  margin-top:12px;
}
.chapter-item{
  grid-template-columns:56px 1fr auto;
  min-height:56px;
  padding:10px 0;
}
.chapter-item strong{
  font-size:18px;
  line-height:1.45;
}
.chapter-item span span,
.chapter-item small{
  display:none !important;
}
.chapter-item.is-fragment{
  min-height:48px;
  opacity:.78;
}
.chapter-item.is-fragment .chapter-no{
  font-size:11px;
}
.chapter-item.is-disabled{
  pointer-events:none;
}
.prose{
  max-width:780px;
}
.prose-subtitle{
  font-size:20px;
  font-weight:400;
  letter-spacing:.12em;
  margin:3em 0 1em;
}
.record-quote{
  margin:1.4em 0;
  padding:1em 1.2em;
  border-left:3px solid var(--green);
  background:rgba(15,17,19,.04);
  color:#293030;
  line-height:2.05;
}
.prose ul{
  margin:1.5em 0 1.8em 1.4em;
  padding:0;
}
.prose li{
  margin:.4em 0;
}
.chapter-nav{
  margin-top:64px;
}
.site-dates{
  color:rgba(255,255,255,.62);
  letter-spacing:.08em;
}
@media(max-width:760px){
  .contents-part{font-size:21px;margin:26px 0 6px}
  .chapter-item{grid-template-columns:44px 1fr auto;gap:14px;padding:9px 0;min-height:52px}
  .chapter-item strong{font-size:16px}
  .prose{font-size:16px;line-height:2.08}
  .record-quote{padding:.85em 1em;line-height:1.9}
}


/* v1.4 record fragment pages */
.chapter-item.is-fragment{
  background:rgba(15,17,19,.035);
  padding-left:12px;
  padding-right:12px;
}
.chapter-item.is-fragment .chapter-no{
  width:auto;
  min-width:56px;
  padding:0 8px;
  font-size:11px;
  background:var(--green);
}
.record-fragment{
  max-width:720px;
  border-top:1px solid var(--line);
  padding-top:34px;
}
.record-line{
  margin:0 0 .72em;
  line-height:1.9;
  letter-spacing:.04em;
}
.record-separator{
  border:0;
  border-top:1px solid var(--line);
  margin:1.7em 0;
}
.record-table{
  width:100%;
  border-collapse:collapse;
  margin:1.6em 0 2em;
  font-size:14px;
  line-height:1.7;
}
.record-table th,
.record-table td{
  border:1px solid var(--line);
  padding:.65em .75em;
  vertical-align:top;
}
.record-table th{
  font-weight:400;
  background:rgba(15,17,19,.06);
}
@media(max-width:760px){
  .chapter-item.is-fragment .chapter-no{
    min-width:48px;
    font-size:10px;
  }
  .record-fragment{
    padding-top:24px;
  }
  .record-table{
    font-size:13px;
    display:block;
    overflow-x:auto;
    white-space:nowrap;
  }
}