/* Direction C — shared design system (content pages) */
:root{
  /* type scale (harmonised; see _internal docs) */
  --fs-hero:50px;--fs-title:42px;--fs-title-sm:36px;--fs-head:30px;--fs-subhead:26px;--fs-card:24px;--fs-lead:20px;--fs-lg:18px;--fs-md:16px;--fs-base:15px;--fs-sm:14px;--fs-meta:13px;--fs-label:12px;--fs-mini:11px;--fs-micro:10px;--fs-map:9px;

  --bg:#F6F8FB;--bg2:#ECF1F6;--card:#FFF;--line:#DCE4ED;--line2:#C6D3E0;
  --navy:#1F3A5F;--navy2:#2C4F7C;--ink:#16202E;--text:#3A4658;--muted:#73808F;
  --clay:#C2683D;--clay-soft:#F0E0D6;--sea:#AEB9C7;
  --line-soft:#E7ECF2;
  --r1:#DCE7F2;--r2:#AEC4DE;--r3:#7B9CC4;--r4:#4A72A4;--r5:#1F3A5F;
  --maxw:960px;--shell:1240px;--card-sh:0 1px 3px rgba(0,0,0,.06);
}
/* tabular figures for any data/number — keep digits column-aligned */
.tnum{font-variant-numeric:tabular-nums}
/* section lead: mid-step between H2 and body (refinement #5) */
.intro{font-size:var(--fs-lead);line-height:1.6;color:var(--text);max-width:64ch;margin:0 0 14px}
*{box-sizing:border-box}html{scroll-behavior:smooth}
body{margin:0;background:var(--bg);color:var(--text);font-family:"Libre Franklin",system-ui,sans-serif;font-size:var(--fs-base);line-height:1.6;-webkit-font-smoothing:antialiased}
a{color:inherit}
.serif{font-family:"Newsreader",Georgia,serif}
.wrap{max-width:var(--maxw);margin:0 auto;padding:0 32px}
.kick{font-size:var(--fs-mini);letter-spacing:.14em;text-transform:uppercase;color:var(--clay);font-weight:600}
.ph{color:var(--muted);font-style:italic}
:focus{outline:none}:focus-visible{outline:2px solid var(--clay);outline-offset:2px;border-radius:3px}
@media (prefers-reduced-motion: reduce){*{transition-duration:.001ms!important;animation-duration:.001ms!important}}

/* nav */
header.top{background:rgba(246,248,251,.92);backdrop-filter:blur(8px);border-bottom:1px solid var(--line);position:sticky;top:0;z-index:30}
.topin{display:flex;align-items:center;gap:28px;height:64px;max-width:var(--shell);margin:0 auto;padding:0 32px}
.brand{display:flex;align-items:center;gap:10px;font-weight:600;color:var(--navy);font-size:var(--fs-base);text-decoration:none}
.mark{width:30px;height:30px;flex-shrink:0}
nav.main{margin-left:auto;display:flex;gap:22px;font-size:var(--fs-meta);font-weight:500;align-items:center}
nav.main a{text-decoration:none;padding:5px 0;border-bottom:2px solid transparent;color:var(--text)}
nav.main a.active{color:var(--navy);border-color:var(--clay)}nav.main a:hover{color:var(--navy)}
.lang{font-size:var(--fs-label);color:var(--muted);padding-left:14px;border-left:1px solid var(--line2)}.lang b{color:var(--navy)}
.navtoggle{display:none;flex-direction:column;justify-content:center;gap:5px;width:42px;height:42px;padding:9px;background:none;border:0;cursor:pointer}
.navtoggle span{display:block;width:22px;height:2px;background:var(--navy);border-radius:2px;transition:transform .2s,opacity .2s}
.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)}

/* page header */
.pagehead{padding:48px 0 10px}
.pagehead h1{font-family:"Newsreader",Georgia,serif;font-size:var(--fs-title);font-weight:500;color:var(--ink);letter-spacing:-.01em;margin:8px 0 8px;line-height:1.1}
.pagehead .lead{font-size:var(--fs-lg);max-width:64ch;margin:0}

/* sections + generic */
.sec{padding:32px 0;border-bottom:1px solid var(--line)}
.sec:last-of-type{border-bottom:0}
.sec h2{font-family:"Newsreader",Georgia,serif;font-size:var(--fs-subhead);font-weight:500;color:var(--ink);margin:0 0 14px}
.prose p{margin:0 0 12px;max-width:78ch}
.grid-2{display:grid;grid-template-columns:1fr 1fr;gap:24px}
.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.card{background:var(--card);border:1px solid var(--line-soft);border-radius:12px;padding:24px;box-shadow:var(--card-sh)}
.btn{display:inline-block;font-size:var(--fs-sm);font-weight:600;text-decoration:none;padding:12px 22px;border-radius:9px;cursor:pointer;transition:background .16s}
.btn.solid{background:var(--navy);color:#fff}.btn.solid:hover{background:var(--navy2)}
.btn.ghost{color:var(--navy);border:1px solid var(--line2);background:var(--card)}.btn.ghost:hover{background:var(--bg2)}
.btn:focus-visible{outline:2px solid var(--clay);outline-offset:2px}
.btn:disabled,.btn[aria-disabled="true"]{opacity:.5;cursor:not-allowed;pointer-events:none}
.tags{display:flex;flex-wrap:wrap;gap:6px}
.tag{font-size:var(--fs-label);border:1px solid var(--line2);border-radius:13px;padding:4px 11px;color:var(--text)}
.list-clean{list-style:none;padding:0;margin:0}
.list-clean li{padding:10px 0;border-bottom:1px solid var(--line);max-width:78ch}

/* themes (about) — single-column numbered list (5 themes, no orphan column) */
.themelist{display:flex;flex-direction:column;gap:14px}
.themecard{display:flex;gap:22px;align-items:flex-start}
.themenum{font-family:"Newsreader",Georgia,serif;font-size:var(--fs-head);font-weight:500;line-height:1;color:var(--r4);flex-shrink:0;width:42px;font-variant-numeric:tabular-nums}
.themecard h3{font-size:var(--fs-lg);color:var(--ink);margin:0 0 8px}
.themecard .tbody{flex:1}
.themecard p{font-size:var(--fs-sm);color:var(--muted);margin:0;max-width:78ch}
@media(max-width:560px){.themecard{gap:14px}.themenum{font-size:var(--fs-card);width:32px}}

/* team */
.profile{display:grid;grid-template-columns:130px 1fr;gap:24px;align-items:start}
.avatar{width:130px;height:130px;border-radius:14px;background:linear-gradient(135deg,var(--bg2),var(--line));display:flex;align-items:center;justify-content:center;color:var(--muted);font-size:var(--fs-label);text-align:center;object-fit:cover;flex-shrink:0}
.profile h3{font-family:"Newsreader",Georgia,serif;font-size:var(--fs-card);color:var(--ink);margin:0 0 2px;font-weight:500}
.profile .role{color:var(--clay);font-weight:600;font-size:var(--fs-meta);margin-bottom:10px}
.profile .pbio{font-size:var(--fs-sm);margin:0}

/* publications */
.pub{padding:18px 0;border-bottom:1px solid var(--line)}
.pub .yr{font-family:"Newsreader",Georgia,serif;font-size:var(--fs-lg);color:var(--navy);font-weight:600;float:left;width:64px;font-variant-numeric:tabular-nums}
.pub .body{margin-left:80px}
.pub .title{font-size:var(--fs-md);color:var(--ink);font-weight:600;margin:2px 0 4px}
.pub .venue{font-size:var(--fs-meta);color:var(--muted)}
.feat h2{margin-bottom:6px}
.feat-sub{font-family:"Newsreader",Georgia,serif;font-size:var(--fs-lg);line-height:1.35;color:var(--muted);font-weight:400;margin:0 0 14px}
.pubfeature{margin-top:14px}
.pubfeature .tags{margin-bottom:14px}
.pubfeature-title{font-family:"Newsreader",Georgia,serif;font-size:var(--fs-card);line-height:1.3;color:var(--ink);font-weight:500;margin:0 0 6px}
.pubfeature-subtitle{font-family:"Newsreader",Georgia,serif;font-size:var(--fs-lg);line-height:1.35;color:var(--muted);font-weight:400;margin:0 0 12px;max-width:62ch}
.pubfeature-meta{font-size:var(--fs-sm);color:var(--navy);font-weight:500;margin:0 0 2px}
.pubfeature-affil{font-size:var(--fs-sm);color:var(--muted);font-weight:500;margin:0 0 14px}
.pubfeature-abstract{font-size:var(--fs-base);line-height:1.65;color:var(--text);margin:0 0 16px;max-width:62ch}
.pubfeature-abstract:last-of-type{margin-bottom:20px}

/* news */
.post{background:var(--card);border:1px solid var(--line-soft);border-radius:12px;padding:22px;box-shadow:var(--card-sh)}
.post .ptag{font-size:var(--fs-micro);letter-spacing:.08em;text-transform:uppercase;color:var(--clay);font-weight:600}
.post h3{font-size:var(--fs-lg);color:var(--ink);margin:8px 0 6px;line-height:1.3}
.post p{font-size:var(--fs-meta);color:var(--muted);margin:0}
.post .date{font-size:var(--fs-label);color:var(--muted);margin-top:12px}

/* resources */
.resource{display:flex;align-items:center;gap:16px;padding:18px;border:1px solid var(--line-soft);border-radius:12px;background:var(--card);margin-bottom:12px;box-shadow:var(--card-sh)}
.resource .ic{width:42px;height:42px;border-radius:10px;background:var(--bg2);display:flex;align-items:center;justify-content:center;flex-shrink:0;color:var(--navy);font-weight:700;font-size:var(--fs-label)}
.resource .meta{flex:1}.resource .meta .t{font-weight:600;color:var(--ink)}.resource .meta .d{font-size:var(--fs-meta);color:var(--muted)}

/* contact form */
.form{display:grid;gap:14px;max-width:520px}
.form label{font-size:var(--fs-label);font-weight:600;color:var(--navy);display:block;margin-bottom:5px}
.form input,.form textarea{width:100%;border:1px solid var(--line2);border-radius:9px;padding:11px 13px;font-size:var(--fs-sm);font-family:inherit;background:var(--card);color:var(--ink)}
.form textarea{min-height:120px;resize:vertical}

/* credits roll (About) */
.creditroll{text-align:center;padding:14px 0 4px;border-top:1px solid var(--line);margin-top:8px}
.creditroll .grp{margin:22px 0}
.creditroll .role{font-size:var(--fs-mini);letter-spacing:.14em;text-transform:uppercase;color:var(--clay);font-weight:600;margin-bottom:6px}
.creditroll .name{font-family:"Newsreader",Georgia,serif;font-size:var(--fs-lead);color:var(--ink)}
.creditroll .creditlogo{display:block;height:44px;width:auto;object-fit:contain;margin:8px auto 10px}
.creditroll a.grp{display:block;text-decoration:none;color:inherit;border-radius:10px;padding:10px 8px;transition:background .14s}
.creditroll a.grp:hover{background:var(--bg2)}
.creditroll a.grp:hover .name{color:var(--clay)}
.creditroll .sub{font-size:var(--fs-meta);color:var(--muted);margin-top:2px}

/* news — modest dated list (intentionally not a card feed: the site is static) */
.newslist{list-style:none;padding:0;margin:0}
.newslist li{display:grid;grid-template-columns:130px 1fr;gap:20px;padding:16px 0;border-bottom:1px solid var(--line);align-items:baseline}
.newslist .date{font-size:var(--fs-meta);color:var(--muted);font-variant-numeric:tabular-nums}
.newslist .ntag{font-size:var(--fs-micro);letter-spacing:.06em;text-transform:uppercase;color:var(--clay);font-weight:600;margin-right:10px}
.newslist .ntitle{font-weight:600;color:var(--ink)}
.newslist a.ntitle{text-decoration:none}
.newslist a.ntitle:hover{text-decoration:underline;text-underline-offset:2px}
.newslist .nmeta{color:var(--navy);font-size:var(--fs-meta);font-weight:500;margin-top:4px}
.newslist .nexc{color:var(--muted);font-size:var(--fs-sm);margin-top:3px}
@media(max-width:680px){.newslist li{grid-template-columns:1fr;gap:4px}}

/* footer */
footer{background:var(--bg2);border-top:1px solid var(--line);padding:44px 0 52px;color:var(--text);margin-top:40px}
.footgrid{display:grid;grid-template-columns:1.5fr 1fr 1fr;gap:40px;max-width:var(--shell);margin:0 auto;padding:0 32px}
.foot-h{font-size:var(--fs-mini);letter-spacing:.1em;text-transform:uppercase;color:var(--muted);margin-bottom:12px;font-weight:600}
footer a{display:block;text-decoration:none;color:var(--text);margin:7px 0;font-size:var(--fs-sm)}footer a:hover{color:var(--navy)}
.kakenhi{font-size:var(--fs-label);line-height:1.7;color:var(--muted);border-top:1px solid var(--line2);padding-top:18px;margin-top:32px;max-width:1180px;margin-left:auto;margin-right:auto;padding-left:32px;padding-right:32px}
.kakenhi a{display:inline;color:var(--navy);text-decoration:none}.kakenhi a:hover{text-decoration:underline}

@media(max-width:980px){.grid-2,.grid-3,.footgrid{grid-template-columns:1fr}.profile{grid-template-columns:1fr}.pagehead h1{font-size:var(--fs-head)}.navtoggle{display:flex;margin-left:auto}nav.main{position:absolute;top:100%;left:0;right:0;margin:0;flex-direction:column;align-items:stretch;gap:0;background:var(--card);border-bottom:1px solid var(--line);box-shadow:0 12px 26px rgba(15,23,42,.12);display:none;padding:4px 0}nav.main.open{display:flex}nav.main a{padding:14px 24px;border-bottom:1px solid var(--line)}nav.main a:last-child{border-bottom:0}nav.main .lang{padding:14px 24px;border-left:0;border-top:1px solid var(--line)}}