*{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:#fbf7f0;--ink:#2b2620;--accent:#c65d21;--accent2:#a24616;--soft:#f3ebdd;
  --line:#e6dccb;--muted:#7a6f5f;--foot-bg:#2b2620;--foot-fg:#f3ebdd;
  --ff-disp:'Shippori Mincho',serif;--ff-body:'Zen Kaku Gothic New',sans-serif;
  --maxw:940px;--radius:4px;
}

body{font-family:var(--ff-body);background:var(--bg);color:var(--ink);line-height:1.9;font-size:16px}
.shell{position:relative;padding-top:64px}

/* header */
.hd{position:fixed;top:0;left:0;right:0;height:64px;display:flex;align-items:center;gap:18px;padding:0 26px;background:var(--bg);border-bottom:2px solid var(--ink);z-index:80}
.hd .logo{font-family:var(--ff-disp);font-weight:700;font-size:20px;color:var(--ink);letter-spacing:.04em}
.hd .logo b{color:var(--accent)}
.hd-nav{margin-left:auto;overflow-x:auto}
.hd-nav ul{display:flex;align-items:center;gap:4px}
.hd-nav a{display:inline-block;font-size:14px;font-weight:500;color:var(--muted);padding:8px 13px;border-radius:var(--radius);white-space:nowrap;transition:.2s}
.hd-nav a:hover{color:var(--accent)}
.hd-nav a.is-active{color:#fff;background:var(--accent)}
.burger{display:none;margin-left:auto;width:42px;height:42px;background:none;border:none;cursor:pointer;flex-direction:column;justify-content:center;gap:5px;padding:8px}
.burger span{display:block;height:2px;background:var(--ink);transition:.3s}
.burger[aria-expanded="true"] span:nth-child(1){transform:translateY(7px) rotate(45deg)}
.burger[aria-expanded="true"] span:nth-child(2){opacity:0}
.burger[aria-expanded="true"] span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}
.drawer{display:none;position:fixed;top:64px;left:0;right:0;background:var(--bg);border-bottom:2px solid var(--ink);z-index:79}
.drawer ul{padding:8px 0}
.drawer a{display:block;padding:13px 26px;font-size:15px;font-weight:500;color:var(--ink);border-top:1px solid var(--line)}
.drawer a.is-active{color:var(--accent)}
.drawer.open{display:block}

/* hero (index) */
.hero{background:linear-gradient(160deg,var(--soft),var(--bg))}
.hero .in{max-width:var(--maxw);margin:0 auto;padding:70px 26px 56px}
.hero .k{font-family:var(--ff-disp);color:var(--accent);letter-spacing:.14em;font-size:13px;margin-bottom:18px}
.hero h1{font-family:var(--ff-disp);font-weight:700;font-size:clamp(28px,5vw,44px);line-height:1.5;margin-bottom:20px;letter-spacing:.02em}
.hero p.desc{color:var(--muted);max-width:60ch;font-size:16.5px}

/* index nav cards */
.guide{max-width:var(--maxw);margin:0 auto;padding:64px 26px}
.guide h2{font-family:var(--ff-disp);font-weight:700;font-size:26px;margin-bottom:6px;position:relative;padding-left:18px}
.guide h2::before{content:"";position:absolute;left:0;top:6px;bottom:6px;width:5px;background:var(--accent);border-radius:3px}
.guide .sub{color:var(--muted);font-size:14.5px;margin-bottom:32px;padding-left:18px}
.cards{display:grid;grid-template-columns:repeat(auto-fill,minmax(260px,1fr));gap:18px}
.card{display:block;background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:26px 24px;transition:.25s;position:relative;overflow:hidden}
.card::after{content:"";position:absolute;left:0;top:0;bottom:0;width:5px;background:var(--accent);transform:scaleY(0);transform-origin:top;transition:.3s}
.card:hover{transform:translateY(-4px);border-color:var(--accent);box-shadow:0 18px 34px -22px rgba(43,38,32,.5)}
.card:hover::after{transform:scaleY(1)}
.card .no{font-family:var(--ff-disp);font-size:13px;color:var(--accent);letter-spacing:.1em;margin-bottom:10px}
.card h3{font-family:var(--ff-disp);font-weight:700;font-size:18px;margin-bottom:8px}
.card p{color:var(--muted);font-size:14px}

/* article pages */
.page-main{max-width:var(--maxw);margin:0 auto;padding:64px 26px 80px}
.crumb{font-size:12.5px;color:var(--muted);margin-bottom:26px}
.crumb a:hover{color:var(--accent)}
.crumb span{color:var(--accent)}
.page-head{margin-bottom:42px;padding-bottom:26px;border-bottom:2px solid var(--ink)}
.eyebrow{font-family:var(--ff-disp);letter-spacing:.16em;font-size:12px;color:var(--accent);margin-bottom:12px}
.page-head h1{font-family:var(--ff-disp);font-weight:700;font-size:clamp(26px,4.6vw,38px);line-height:1.5;margin-bottom:14px;letter-spacing:.02em}
.lead{color:var(--muted);font-size:16px;max-width:60ch}
.block{margin:0 0 46px}
.block h2{font-family:var(--ff-disp);font-weight:700;font-size:clamp(20px,3.2vw,27px);margin-bottom:16px;padding-left:16px;position:relative}
.block h2::before{content:"";position:absolute;left:0;top:4px;bottom:4px;width:5px;background:var(--accent);border-radius:3px}
.block p{margin-bottom:15px}
.block.has-img{display:grid;grid-template-columns:1.2fr .85fr;gap:34px;align-items:center}
.block-fig img{border-radius:var(--radius);width:100%;aspect-ratio:4/3;object-fit:cover;box-shadow:0 16px 36px -22px rgba(43,38,32,.5)}
@media(max-width:760px){.block.has-img{grid-template-columns:1fr;gap:20px}}

/* prev/next */
.pager{display:flex;justify-content:space-between;gap:14px;margin-top:56px;padding-top:28px;border-top:1px solid var(--line)}
.pager a{flex:1;background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:16px 20px;transition:.25s;max-width:48%}
.pager a:hover{border-color:var(--accent);transform:translateY(-3px)}
.pager .dir{font-family:var(--ff-disp);font-size:12px;color:var(--accent);letter-spacing:.08em;margin-bottom:5px}
.pager .ttl{font-weight:700;font-size:14.5px}
.pager .next{text-align:right;margin-left:auto}
.pager .spacer{flex:1;max-width:48%}

/* sitemap list */
.sitemap-page .page-head{border-bottom:none;padding-bottom:0}
.sitemap-list{border-top:2px solid var(--ink)}
.sitemap-list li{border-bottom:1px solid var(--line)}
.sitemap-list a{display:block;padding:22px 8px;transition:.2s;position:relative}
.sitemap-list a:hover{background:var(--soft);padding-left:20px}
.sitemap-list .nm{font-family:var(--ff-disp);font-weight:700;font-size:17px;margin-bottom:5px;display:flex;align-items:center;gap:12px}
.sitemap-list .nm::before{content:"›";color:var(--accent);font-size:20px}
.sitemap-list .dsc{color:var(--muted);font-size:14px;padding-left:32px}

/* footer */
.site-footer{background:var(--foot-bg);color:var(--foot-fg);margin-top:80px}
.ft-top ul{max-width:var(--maxw);margin:0 auto;padding:26px 26px;display:flex;flex-wrap:wrap;justify-content:center;gap:10px 26px;font-size:14px;border-bottom:1px solid rgba(255,255,255,.14)}
.ft-top a{opacity:.82;transition:.2s}
.ft-top a:hover{opacity:1;color:var(--accent)}
.ft-in{max-width:var(--maxw);margin:0 auto;padding:26px;display:flex;align-items:center;justify-content:space-between;gap:18px;flex-wrap:wrap}
.ft-name{font-family:var(--ff-disp);font-weight:700;font-size:19px}
.ft-tag{opacity:.7;font-size:13.5px;margin-top:4px}
.ft-copy{font-size:12px;opacity:.55}

.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(43,38,32,.6)}
.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}

@media(max-width:720px){
  .hd-nav{display:none}
  .burger{display:flex}
}