*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
img{max-width:100%;display:block}
a{text-decoration:none;color:inherit}
ul,ol{list-style:none}
body{-webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility}
@media (prefers-reduced-motion: reduce){*{animation:none!important;transition:none!important;scroll-behavior:auto!important}}
:focus-visible{outline:3px solid var(--accent);outline-offset:2px}

:root{
  --bg:#faf6f0;--ink:#2b2621;--accent:#c0632a;--accent2:#9a4d1f;--soft:#f1e8dc;
  --line:#e3d7c6;--muted:#7a6f61;--foot-bg:#241f1a;--foot-fg:#efe6d8;
  --ff-disp:'Zen Old Mincho','Noto Serif JP',serif;--ff-body:'Noto Sans JP',sans-serif;
  --maxw:960px;--radius:6px;
}

body{font-family:var(--ff-body);background:var(--bg);color:var(--ink);line-height:1.9;font-size:16px}
.shell{position:relative;padding-top:66px}

/* ---- top nav bar ---- */
.topbar{position:fixed;top:0;left:0;right:0;height:66px;display:flex;align-items:center;justify-content:space-between;padding:0 28px;background:rgba(250,246,240,.94);backdrop-filter:blur(8px);border-bottom:1px solid var(--line);z-index:80}
.topbar .logo{font-family:var(--ff-disp);font-weight:700;font-size:20px;color:var(--ink);letter-spacing:.02em}
.topbar .logo b{color:var(--accent)}
.mainnav ul{display:flex;gap:6px}
.mainnav a{display:block;padding:9px 15px;font-size:14px;font-weight:500;color:var(--muted);border-radius:4px;transition:.2s}
.mainnav a:hover{color:var(--accent);background:var(--soft)}
.mainnav a.is-active{color:var(--accent);font-weight:700}
.navtoggle{display:none;width:40px;height:40px;background:none;border:none;cursor:pointer;flex-direction:column;justify-content:center;gap:5px;padding:8px}
.navtoggle span{display:block;height:2px;background:var(--ink);transition:.3s}
.navtoggle[aria-expanded="true"] span:nth-child(1){transform:translateY(7px) rotate(45deg)}
.navtoggle[aria-expanded="true"] span:nth-child(2){opacity:0}
.navtoggle[aria-expanded="true"] span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}
@media(max-width:760px){
  .navtoggle{display:flex}
  .mainnav{position:fixed;top:66px;left:0;right:0;background:var(--bg);border-bottom:1px solid var(--line);max-height:0;overflow:hidden;transition:max-height .35s ease}
  .mainnav.open{max-height:420px}
  .mainnav ul{flex-direction:column;gap:0;padding:8px 16px 18px}
  .mainnav a{padding:13px 8px;border-bottom:1px solid var(--line);border-radius:0}
}

/* ---- hero (home) ---- */
.hero{background:linear-gradient(160deg,var(--soft),var(--bg))}
.hero-in{max-width:var(--maxw);margin:0 auto;padding:86px 28px 70px;display:grid;grid-template-columns:1.15fr .85fr;gap:48px;align-items:center}
.hero .k{font-family:var(--ff-disp);letter-spacing:.28em;font-size:12px;color:var(--accent);margin-bottom:18px}
.hero h1{font-family:var(--ff-disp);font-weight:700;font-size:clamp(30px,5.2vw,50px);line-height:1.32;margin-bottom:22px}
.hero h1 span{color:var(--accent)}
.hero .lead{color:var(--muted);font-size:16px;max-width:44ch;margin-bottom:28px}
.hero-fig{position:relative}
.hero-fig img{border-radius:var(--radius);aspect-ratio:4/3.4;object-fit:cover;box-shadow:0 24px 50px -28px rgba(43,38,33,.5)}
.hero-fig::before{content:"";position:absolute;inset:14px -14px -14px 14px;border:2px solid var(--accent);border-radius:var(--radius);z-index:-1}
.btn{display:inline-block;font-family:var(--ff-disp);font-weight:700;background:var(--accent);color:#fff;padding:13px 30px;border-radius:40px;font-size:15px;transition:.25s;box-shadow:0 12px 26px -14px var(--accent)}
.btn:hover{background:var(--accent2);transform:translateY(-2px)}
@media(max-width:760px){.hero-in{grid-template-columns:1fr;gap:34px}.hero-fig::before{inset:10px -10px -10px 10px}}

/* ---- conclusion band ---- */
.concl{background:var(--ink);color:var(--foot-fg)}
.concl-in{max-width:760px;margin:0 auto;padding:52px 28px;text-align:center}
.concl .lbl{font-family:var(--ff-disp);letter-spacing:.2em;font-size:12px;color:var(--accent);margin-bottom:14px}
.concl p{font-family:var(--ff-disp);font-size:clamp(17px,2.6vw,22px);line-height:1.8}

/* ---- home guide list ---- */
.guides{max-width:var(--maxw);margin:0 auto;padding:76px 28px}
.guides-head{text-align:center;margin-bottom:44px}
.guides-head .eyebrow{font-family:var(--ff-disp);letter-spacing:.24em;font-size:12px;color:var(--accent);margin-bottom:12px}
.guides-head h2{font-family:var(--ff-disp);font-weight:700;font-size:clamp(24px,4vw,34px)}
.guide-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:20px}
.guide-card{display:block;background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:30px 28px;transition:.25s;position:relative;overflow:hidden}
.guide-card::before{content:"";position:absolute;left:0;top:0;bottom:0;width:4px;background:var(--accent);transform:scaleY(0);transform-origin:top;transition:.3s}
.guide-card:hover{transform:translateY(-4px);box-shadow:0 20px 40px -26px rgba(43,38,33,.4);border-color:var(--accent)}
.guide-card:hover::before{transform:scaleY(1)}
.guide-card .no{font-family:var(--ff-disp);font-size:13px;letter-spacing:.15em;color:var(--accent);margin-bottom:10px}
.guide-card h3{font-family:var(--ff-disp);font-weight:700;font-size:19px;margin-bottom:10px}
.guide-card p{color:var(--muted);font-size:14px;line-height:1.8}
.guide-card .arrow{margin-top:16px;font-size:13px;font-weight:700;color:var(--accent)}
@media(max-width:640px){.guide-grid{grid-template-columns:1fr}}

/* ---- article page ---- */
.page-main{max-width:800px;margin:0 auto;padding:66px 28px 84px}
.crumbs{font-size:12.5px;color:var(--muted);margin-bottom:26px}
.crumbs a:hover{color:var(--accent)}
.crumbs span{margin:0 6px;opacity:.5}
.page-head{border-bottom:2px solid var(--accent);padding-bottom:26px;margin-bottom:40px}
.eyebrow{font-family:var(--ff-disp);letter-spacing:.24em;font-size:12px;color:var(--accent);text-transform:uppercase;margin-bottom:14px}
.page-head h1{font-family:var(--ff-disp);font-weight:700;font-size:clamp(26px,4.6vw,40px);line-height:1.35}
.lead{color:var(--muted);font-size:16px;margin-top:18px}
.block{margin:0 0 46px}
.block h2{font-family:var(--ff-disp);font-weight:700;font-size:clamp(20px,3.2vw,27px);margin-bottom:18px;padding-left:16px;border-left:5px solid var(--accent)}
.block p{margin-bottom:16px}
.block.has-img{display:grid;grid-template-columns:1fr .82fr;gap:34px;align-items:center}
.block.has-img h2{margin-bottom:14px}
.block-fig img{border-radius:var(--radius);width:100%;aspect-ratio:4/3;object-fit:cover;box-shadow:0 16px 34px -22px rgba(43,38,33,.45)}
@media(max-width:720px){.block.has-img{grid-template-columns:1fr;gap:20px}}
.callout{background:var(--soft);border-radius:var(--radius);padding:24px 26px;margin:0 0 46px;border-left:5px solid var(--accent)}
.callout p{margin:0;font-family:var(--ff-disp);font-size:16px}

/* ---- prev/next nav ---- */
.pager{display:flex;justify-content:space-between;gap:16px;margin-top:56px;padding-top:32px;border-top:1px solid var(--line);flex-wrap:wrap}
.pager a{flex:1;min-width:200px;background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:16px 20px;transition:.2s}
.pager a:hover{border-color:var(--accent);transform:translateY(-2px)}
.pager .dir{font-size:12px;color:var(--accent);font-weight:700;margin-bottom:5px;font-family:var(--ff-disp)}
.pager .ttl{font-size:14px;font-weight:700}
.pager .next{text-align:right}

/* ---- sitemap (list) ---- */
.sitemap-list{border-top:1px solid var(--line)}
.sitemap-list li{border-bottom:1px solid var(--line)}
.sitemap-list a{display:grid;grid-template-columns:auto 1fr;gap:4px 20px;padding:24px 6px;align-items:start;transition:.2s}
.sitemap-list a:hover{background:var(--soft);padding-left:16px}
.sitemap-list .st-ttl{grid-column:2;font-family:var(--ff-disp);font-weight:700;font-size:18px;color:var(--ink)}
.sitemap-list a:hover .st-ttl{color:var(--accent)}
.sitemap-list .st-no{grid-row:1 / span 2;font-family:var(--ff-disp);color:var(--accent);font-size:15px;font-weight:700;padding-top:2px}
.sitemap-list .st-desc{grid-column:2;color:var(--muted);font-size:14px;line-height:1.8}
.sitemap-list .st-file{grid-column:2;font-size:12px;color:var(--muted);opacity:.7;margin-top:4px;font-family:var(--ff-disp)}

/* ---- footer ---- */
.site-footer{background:var(--foot-bg);color:var(--foot-fg);margin-top:0}
.site-footer .ft-in{max-width:var(--maxw);margin:0 auto;padding:56px 28px 26px;display:grid;grid-template-columns:1.5fr 1fr;gap:34px}
.site-footer .ft-name{font-family:var(--ff-disp);font-weight:700;font-size:21px;margin-bottom:12px}
.site-footer .ft-name b{color:var(--accent)}
.site-footer .ft-tag{opacity:.7;font-size:14px;max-width:36ch}
.site-footer .ft-nav ul{display:flex;flex-direction:column;gap:11px;font-size:14px}
.site-footer .ft-nav a{opacity:.85;transition:.2s}
.site-footer .ft-nav a:hover{opacity:1;color:var(--accent)}
.site-footer .ft-copy{text-align:center;padding:18px;font-size:12px;opacity:.55;border-top:1px solid rgba(255,255,255,.1)}
@media(max-width:640px){.site-footer .ft-in{grid-template-columns:1fr;gap:24px}}

.to-top{position:fixed;right:20px;bottom:20px;width:46px;height:46px;border-radius:50%;background:var(--accent);color:#fff;display:flex;align-items:center;justify-content:center;font-size:20px;opacity:0;pointer-events:none;transform:translateY(12px);transition:.3s;z-index:60;box-shadow:0 8px 20px -8px rgba(0,0,0,.5)}
.to-top.show{opacity:1;pointer-events:auto;transform:none}
.reveal{opacity:0;transform:translateY(24px);transition:opacity .7s ease,transform .7s ease}
.reveal.in{opacity:1;transform:none}

/* ---- article body (no subheadings) ---- */
.article-body{font-size:16px}
.article-body p{margin-bottom:22px}
.article-body .plain-fig{margin:34px 0}
.article-body .plain-fig img{border-radius:var(--radius);width:100%;max-height:420px;object-fit:cover;box-shadow:0 16px 34px -22px rgba(43,38,33,.45)}