:root{
  --paper:#f5eee2;
  --paper-2:#fbf8f1;
  --white:#fffdf9;
  --ink:#2f2b27;
  --muted:#72695f;
  --red:#c85c4b;
  --red-dark:#9e4438;
  --green:#667663;
  --green-pale:#e8ece1;
  --peach:#ead6c6;
  --tan:#d9c7ad;
  --line:#d6c8b7;
  --shadow:0 12px 32px rgba(58,42,26,.09);
  --shadow-paper:0 7px 18px rgba(65,47,27,.10);
  --serif-ja:"Yu Mincho","Hiragino Mincho ProN","Hiragino Mincho Pro","Noto Serif JP",serif;
  --sans-ja:-apple-system,BlinkMacSystemFont,"Hiragino Kaku Gothic ProN","Yu Gothic","Noto Sans JP",sans-serif;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:var(--paper-2);color:var(--ink);font-family:var(--sans-ja);font-size:16px;line-height:1.85;-webkit-font-smoothing:antialiased}
a{color:inherit;text-underline-offset:.18em}
img{max-width:100%;display:block}
.wrap{width:min(1180px,calc(100% - 40px));margin-inline:auto}
.narrow{max-width:780px}
.skip-link{position:absolute;left:-9999px}
.skip-link:focus{left:12px;top:12px;z-index:999;background:#fff;padding:9px 12px;border:1px solid var(--line)}

.site-header{position:sticky;top:0;z-index:50;background:rgba(251,248,241,.96);backdrop-filter:blur(12px);border-bottom:1px solid rgba(159,137,110,.24)}
.header-row{min-height:84px;display:flex;align-items:center;justify-content:space-between;gap:32px}
.brand{display:flex;align-items:center;gap:12px;text-decoration:none}
.brand-mark,.footer-mark{width:36px;height:36px;border-radius:50% 47% 52% 45%;background:var(--red);color:#fff;display:grid;place-items:center;font-family:var(--serif-ja);font-weight:800;transform:rotate(-5deg);box-shadow:inset 0 0 0 2px rgba(255,255,255,.28)}
.brand-type{display:block}
.brand-ja{display:block;font-family:var(--serif-ja);font-weight:700;font-size:1.08rem;letter-spacing:.04em}
.brand-en{display:block;margin-top:1px;font-size:.62rem;letter-spacing:.13em;color:#7b7167}
.primary-nav ul{display:flex;align-items:center;gap:27px;list-style:none;padding:0;margin:0}
.primary-nav a{font-size:.86rem;text-decoration:none;position:relative;padding:30px 0 27px}
.primary-nav a:after{content:"";position:absolute;left:0;right:100%;bottom:21px;height:2px;background:var(--red);transition:.18s ease}
.primary-nav a:hover:after{right:0}
.nav-toggle{display:none}

.home-hero{position:relative;background:
  radial-gradient(circle at 8% 18%,rgba(200,92,75,.08) 0 2px,transparent 3px),
  radial-gradient(circle at 14% 70%,rgba(200,92,75,.06) 0 3px,transparent 4px),
  linear-gradient(180deg,#f7f0e5,#f1e6d7);
padding:52px 0 88px;overflow:hidden;border-bottom:1px solid var(--line)}
.hero-sheet{position:relative;display:grid;grid-template-columns:minmax(0,1fr) minmax(420px,.92fr);min-height:460px;align-items:center}
.hero-copy{position:relative;z-index:3;padding:38px 8% 90px 20px}
.eyebrow,.section-kicker,.mode-label,.article-mode,.post-mode,.sac-kicker{font-size:.7rem;letter-spacing:.14em;font-weight:800;color:var(--green);text-transform:uppercase}
.hero-overline{font-family:var(--serif-ja);font-size:1rem;letter-spacing:.08em;margin:13px 0 0}
.home-hero h1{font-family:var(--serif-ja);font-size:clamp(3rem,5.1vw,5.3rem);font-weight:600;letter-spacing:.025em;line-height:1.18;margin:.12em 0 .28em}
.home-hero h1 em{font-style:normal;color:var(--red);position:relative}
.home-hero h1 em:after{content:"";position:absolute;left:-.03em;right:-.08em;bottom:-.08em;height:7px;background:linear-gradient(90deg,transparent 0,var(--red) 7%,var(--red) 87%,transparent 100%);opacity:.25;transform:rotate(-1deg)}
.hero-lead{font-family:var(--serif-ja);font-size:1.11rem;line-height:1.95;color:#4f4840}
.hero-note{display:inline-block;margin:20px 0 0;padding:7px 11px;border:1px dashed #c9aa8c;color:#7c5f4b;font-size:.78rem;transform:rotate(-.6deg);background:rgba(255,251,243,.66)}
.hero-visual{position:relative;height:100%;min-height:420px}
.hero-photo{position:absolute;inset:22px -2vw 22px 0;border:9px solid rgba(255,253,249,.9);box-shadow:0 18px 50px rgba(62,41,19,.18);transform:rotate(1.2deg);overflow:hidden;background:#8a6847}
.hero-photo:after{content:"";position:absolute;inset:0;box-shadow:inset 0 0 70px rgba(36,21,10,.16);pointer-events:none}
.hero-photo img{width:100%;height:100%;object-fit:cover}
.hero-sticky{position:absolute;z-index:4;right:4%;bottom:34px;width:min(290px,68%);padding:16px 18px 17px;background:#f4e2b4;box-shadow:0 8px 18px rgba(55,39,18,.16);transform:rotate(-3deg);font-family:var(--serif-ja)}
.hero-sticky:before{content:"";position:absolute;width:78px;height:18px;left:50%;top:-10px;transform:translateX(-50%) rotate(2deg);background:rgba(216,177,130,.63)}
.hero-sticky span{display:block;font-size:.68rem;letter-spacing:.08em;color:#8c6c4e;margin-bottom:5px}
.hero-sticky strong{font-weight:600;font-size:.95rem}

.home-actions{position:absolute;z-index:7;left:20px;right:20px;bottom:-44px;display:grid;grid-template-columns:repeat(4,1fr);gap:14px}
.action-card{position:relative;min-height:126px;padding:21px 20px 18px;background:var(--white);border:1px solid var(--line);box-shadow:var(--shadow-paper);text-decoration:none;transition:transform .18s ease,box-shadow .18s ease}
.action-card:nth-child(2){transform:rotate(.35deg)}
.action-card:nth-child(3){transform:rotate(-.4deg)}
.action-card:hover{transform:translateY(-5px) rotate(0);box-shadow:0 15px 28px rgba(58,42,26,.14)}
.action-no{display:block;color:var(--red);font-family:Georgia,serif;font-style:italic;font-size:.82rem;margin-bottom:8px}
.action-card strong{display:block;font-family:var(--serif-ja);font-size:1.04rem;line-height:1.45}
.action-card>span:last-child{display:block;margin-top:8px;font-size:.75rem;line-height:1.6;color:var(--muted)}
.action-card:after{content:"";position:absolute;right:14px;bottom:13px;width:26px;height:26px;border-radius:50%;background:var(--red);opacity:.92}
.action-card:before{content:"→";position:absolute;z-index:2;right:20px;bottom:14px;color:#fff;font-size:.85rem}

.home-trust{padding:108px 0 56px;background:#fffdf8;border-bottom:1px solid var(--line)}
.trust-inner{display:grid;grid-template-columns:.9fr 2fr;gap:70px;align-items:start}
.trust-heading h2,.section-head h2,.home-about h2{font-family:var(--serif-ja);font-size:clamp(1.65rem,2.5vw,2.35rem);line-height:1.45;font-weight:600;margin:.25em 0}
.trust-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:28px}
.trust-grid article{border-top:1px solid #bfae99;padding-top:13px}
.trust-num{font-family:Georgia,serif;color:var(--red);font-size:.72rem;margin-right:7px}
.trust-grid strong{font-family:var(--serif-ja)}
.trust-grid p{font-size:.82rem;color:var(--muted);line-height:1.75}

.sac-event-module{padding:42px 0;background:var(--green-pale);border-top:1px solid #d5dbc9;border-bottom:1px solid #d5dbc9;position:relative}
.sac-event-module:before{content:"BASHO";position:absolute;right:7vw;top:19px;font-family:Georgia,serif;font-size:4.4rem;letter-spacing:.08em;color:rgba(77,96,74,.06);font-weight:700}
.sac-event-module h2{font-family:var(--serif-ja);font-size:1.7rem;margin:.2em 0 .1em}
.sac-event-module p{max-width:680px}
.event-links{display:flex;flex-wrap:wrap;gap:9px;margin-top:19px}
.event-links a{background:rgba(255,255,255,.8);border:1px solid #bdc7b4;border-radius:999px;padding:8px 14px;text-decoration:none;font-size:.8rem}

.home-two-modes{padding:78px 0 72px;background:linear-gradient(180deg,#f7f0e5,#f8f2e9)}
.home-two-modes .wrap{display:grid;grid-template-columns:1fr 1fr;gap:30px}
.mode-card{position:relative;padding:38px 38px 34px;border:1px solid var(--line);min-height:290px;box-shadow:var(--shadow-paper)}
.mode-card h2{font-family:var(--serif-ja);font-size:1.85rem;line-height:1.45;font-weight:600;margin:.5em 0}
.mode-card p{max-width:540px}
.mode-card>a{display:inline-block;margin-top:11px;font-weight:700;color:var(--red-dark)}
.mode-card.utility{background:#fff}
.mode-card.research{background:
  repeating-linear-gradient(0deg,transparent 0 30px,rgba(108,92,71,.065) 31px),
  #f5ecd9;transform:rotate(.35deg)}
.file-tab{position:absolute;top:-17px;left:27px;background:var(--green);color:#fff;padding:6px 13px;font-size:.7rem;letter-spacing:.12em}
.paper-tape{position:absolute;width:100px;height:24px;left:50%;top:-13px;transform:translateX(-50%) rotate(-2deg);background:rgba(206,178,143,.58)}

.home-latest{padding:75px 0 90px;background:#fffdf9}
.section-head{display:flex;justify-content:space-between;align-items:end;gap:30px;margin-bottom:32px;border-bottom:1px solid var(--line);padding-bottom:18px}
.section-more{font-size:.8rem;color:var(--red-dark)}
.post-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.post-card{position:relative;min-height:265px;padding:26px 25px 45px;background:#fff;border:1px solid #dfd3c4;box-shadow:var(--shadow-paper)}
.post-card:nth-child(2n){transform:rotate(.28deg)}
.post-card:nth-child(3n){transform:rotate(-.24deg)}
.post-card.mode-research{background:#fcf5e9}
.post-card.mode-hybrid{background:#f7f6ed}
.post-pin{position:absolute;left:50%;top:-8px;width:58px;height:16px;transform:translateX(-50%) rotate(1deg);background:rgba(220,188,151,.62)}
.post-meta-row{display:flex;justify-content:space-between;gap:12px;align-items:center}
.post-index{font-family:Georgia,serif;font-style:italic;color:var(--red);font-size:.86rem}
.post-mode{font-size:.6rem}
.post-card h3{font-family:var(--serif-ja);font-size:1.13rem;line-height:1.6;margin:.85em 0 .5em}
.post-card h3 a{text-decoration-thickness:1px;text-decoration-color:rgba(46,43,39,.28)}
.post-card p{font-size:.8rem;color:var(--muted)}
.card-arrow{position:absolute;left:24px;bottom:18px;width:30px;height:30px;border-radius:50%;display:grid;place-items:center;background:var(--red);color:#fff;text-decoration:none}

.home-about{padding:64px 0 84px;background:#eee7db}
.about-sheet{display:grid;grid-template-columns:1fr 1.15fr;gap:70px;align-items:center;padding:42px 50px;background:#f9f3e9;border:1px solid #d8c8b5;box-shadow:var(--shadow-paper);position:relative}
.about-sheet:before{content:"";position:absolute;top:-10px;left:15%;width:90px;height:21px;background:rgba(211,178,139,.56);transform:rotate(-2deg)}
.about-sheet>p{font-family:var(--serif-ja);font-size:1rem;line-height:2}

.article-shell{padding:62px 0 90px;background:#fffdf9}
.article-header{position:relative;padding-top:18px}
.article-header h1{font-family:var(--serif-ja);font-size:clamp(2.35rem,4.8vw,4rem);font-weight:600;line-height:1.35;letter-spacing:.02em;margin:.25em 0 .55em}
.article-mode{display:inline-block;border-bottom:1px solid var(--red);padding-bottom:4px}
.sac-verify{display:flex;flex-direction:column;gap:3px;background:#edf0e8;border-left:4px solid var(--green);padding:13px 15px;margin:24px 0;font-size:.83rem}
.sac-answer{position:relative;background:#fff;border:1px solid #cfd6c7;padding:22px 25px;margin:28px 0;box-shadow:var(--shadow-paper)}
.sac-answer:before{content:"";position:absolute;left:20px;right:20px;top:-5px;height:1px;background:#9faa96}
.article-content{font-size:1.03rem;line-height:2}
.article-content h2{font-family:var(--serif-ja);font-size:1.75rem;font-weight:600;line-height:1.55;margin-top:2.8em;border-bottom:1px solid #d9ccbc;padding-bottom:.35em}
.article-content h3{font-family:var(--serif-ja);font-size:1.28rem;margin-top:2em}
.article-content strong{background:linear-gradient(transparent 70%,rgba(200,92,75,.13) 70%)}
.sac-visual{margin:2.5rem 0;padding:.85rem;background:#fff;border:1px solid #d9ccbc;box-shadow:var(--shadow-paper)}
.sac-visual img{display:block;width:100%;height:auto;background:#f7f1e7}
.sac-visual figcaption{margin:.85rem .2rem .3rem;font-size:.9rem;font-weight:700;line-height:1.7;color:var(--ink)}
.sac-visual-description{margin:.65rem .2rem 0;padding-top:.55rem;border-top:1px solid #ded3c5}
.sac-visual-description summary{display:flex;align-items:center;min-height:44px;cursor:pointer;color:var(--red-dark);font-size:.86rem;font-weight:700}
.sac-visual-description summary:focus-visible{outline:3px solid #1769aa;outline-offset:3px}
.sac-visual-description p{margin:.25rem 0 .6rem;font-size:.86rem;line-height:1.8;color:var(--muted)}
.sac-visual-credit{margin:.55rem .2rem .15rem;font-size:.75rem;line-height:1.65;color:var(--muted)}
.sac-visual-credit a{font-weight:700}
.sac-source-list{margin-top:3.5rem;padding:1.2rem 1.35rem;background:#f7f3ea;border:1px solid var(--line)}
.sac-source-list h2{font-family:var(--serif-ja);font-size:1.35rem;margin:.1rem 0 .7rem}
.sac-source-list p{font-size:.82rem;line-height:1.7;color:var(--muted)}
.sac-source-list ul{padding-left:1.25rem}
.sac-source-list li{margin:.65rem 0;line-height:1.55;overflow-wrap:anywhere}
.sac-source-list small{display:block;color:var(--muted);font-size:.68rem;letter-spacing:.04em}
.sac-mode-research .article-shell,.article-research{background:
  radial-gradient(circle at 12% 8%,rgba(193,145,92,.05) 0 1px,transparent 2px),
  #fbf6ed}
.sac-mode-research .article-content{font-family:var(--serif-ja);font-size:1.04rem}
.sac-mode-research .article-header:before{content:"RESEARCH NOTE";position:absolute;right:0;top:0;color:#9d8164;font:italic .72rem Georgia,serif;letter-spacing:.13em;transform:rotate(1deg)}
.sac-next-links{display:grid;grid-template-columns:1fr 1fr;gap:12px;margin-top:58px;padding-top:24px;border-top:1px solid var(--line)}
.sac-next{display:block;padding:17px;border:1px solid var(--line);text-decoration:none;background:#fff}
.archive-shell{padding:58px 0}
.archive-item{padding:24px 0;border-bottom:1px solid var(--line)}
.zero-state{margin:40px 0;background:#fff;padding:30px;border:1px solid var(--line);box-shadow:var(--shadow-paper)}
.zero-links{display:flex;flex-wrap:wrap;gap:10px}
.zero-links a{border:1px solid var(--line);padding:9px 13px;border-radius:999px;text-decoration:none}
.small{font-size:.82rem;color:#777}

.site-footer{padding:48px 0;background:#efe7da;border-top:1px solid var(--line);font-size:.83rem}
.footer-grid{display:grid;grid-template-columns:1fr 1.25fr 1fr;gap:35px;align-items:start}
.footer-identity{display:flex;gap:11px;align-items:center}
.footer-identity strong,.footer-identity small{display:block}
.footer-identity small{font-size:.58rem;letter-spacing:.12em;color:var(--muted)}
.footer-nav ul{list-style:none;margin:0;padding:0;columns:2}
.footer-nav li{margin-bottom:4px}

@media(max-width:900px){
  .hero-sheet{grid-template-columns:1fr;min-height:auto}
  .hero-copy{padding:32px 0 38px}
  .hero-visual{min-height:310px}
  .hero-photo{inset:0 0 0 0;transform:rotate(.5deg)}
  .home-actions{position:relative;left:auto;right:auto;bottom:auto;margin-top:22px;grid-template-columns:1fr 1fr}
  .home-hero{padding-bottom:44px}
  .home-trust{padding-top:58px}
  .trust-inner{grid-template-columns:1fr;gap:25px}
  .trust-grid{gap:16px}
  .post-grid{grid-template-columns:1fr 1fr}
  .about-sheet{grid-template-columns:1fr;gap:20px}
}
@media(max-width:720px){
  .wrap{width:min(100% - 28px,1180px)}
  .header-row{min-height:70px}
  .brand-ja{font-size:.95rem}
  .brand-en{font-size:.55rem}
  .primary-nav{display:none}
  .primary-nav.is-open{display:block;position:absolute;top:70px;left:0;right:0;background:#fbf8f1;padding:16px 20px;border-bottom:1px solid var(--line)}
  .primary-nav ul{display:block}
  .primary-nav li{padding:6px 0}
  .primary-nav a{padding:4px 0}
  .nav-toggle{display:block;background:transparent;border:1px solid var(--line);padding:7px 10px}
  .home-hero h1{font-size:clamp(2.65rem,13vw,4.2rem)}
  .hero-overline{font-size:.9rem}
  .hero-visual{min-height:260px}
  .hero-sticky{width:67%;right:3%;bottom:18px}
  .home-actions{grid-template-columns:1fr}
  .action-card{min-height:auto}
  .trust-grid,.home-two-modes .wrap,.post-grid,.footer-grid{grid-template-columns:1fr}
  .trust-grid article{padding-bottom:10px}
  .mode-card{min-height:auto;padding:32px 25px}
  .section-head{align-items:start;flex-direction:column}
  .post-card:nth-child(n){transform:none}
  .about-sheet{padding:34px 25px}
  .sac-next-links{grid-template-columns:1fr}
  .sac-visual{margin:2rem -.2rem;padding:.55rem}
  .sac-visual figcaption{font-size:.85rem}
  .sac-visual--explanatory-scale-diagram,
  .sac-visual--data-comparison-chart,
  .sac-visual--document-reading-schematic{overflow-x:auto;overscroll-behavior-inline:contain}
  .sac-visual--explanatory-scale-diagram img,
  .sac-visual--data-comparison-chart img,
  .sac-visual--document-reading-schematic img{width:720px;max-width:none}
}

@media print{
  .sac-visual{break-inside:avoid;box-shadow:none}
  .sac-visual-description{display:block}
}

/* RC4: WordPress pages must render full content instead of falling back to archive-like index.php. */
.page-shell .article-content > h1:first-child{display:none}
.page-shell .article-content > p:first-child{margin-top:0}
.page-shell .sac-link-grid{margin-top:2rem}