/*
Theme Name: CX研究所
Theme URI:
Description: CX研究所 公式テーマ — W1 Classic Advisory。中小企業のCXを財務データで可視化するB2Bメディアサイト用。
Author: CX研究所
Version: 1.0.0
License: Private
Text Domain: cx-kenkyusho
*/

/* ═══════════════════════════════════════════════
   DESIGN TOKENS — W1 Classic Advisory
═══════════════════════════════════════════════ */
:root {
  --c-bg:       #FAF8F4;
  --c-bg2:      #F3EFE8;
  --c-bg3:      #E8E2D8;
  --c-text:     #1C1917;
  --c-text2:    #57534E;
  --c-text3:    #A8A29E;
  --c-acc:      #2B4C8A;
  --c-acc-dim:  #1A365D;
  --c-acc-l:    rgba(43,76,138,.09);
  --c-bdr:      #D6CFC4;
  --c-rule:     #C8B8A2;
  --f-serif:    'Libre Baskerville', Georgia, serif;
  --f-sans:     'Noto Sans JP', sans-serif;
  --max-w:      1080px;
  --ease:       cubic-bezier(.4,0,.2,1);
}

/* ── RESET ─────────────────────────────────── */
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;font-size:16px;scroll-padding-top:72px}
body{font-family:var(--f-sans);background:var(--c-bg);color:var(--c-text);line-height:1.7;-webkit-font-smoothing:antialiased}
img{max-width:100%;height:auto;display:block}
a{color:inherit;text-decoration:none}

/* ── SITE HEADER ───────────────────────────── */
.site-header{
  position:sticky;top:0;z-index:900;
  background:var(--c-bg);
  border-bottom:1px solid var(--c-rule);
}
.header-inner{
  max-width:var(--max-w);margin:0 auto;
  display:flex;align-items:center;justify-content:space-between;
  padding:0 40px;height:64px;
}
.site-logo{
  font-family:var(--f-serif);font-size:17px;font-weight:700;
  color:var(--c-text);letter-spacing:.04em;
}
.gnav{display:flex;gap:32px;list-style:none;align-items:center}
.gnav a{
  font-family:var(--f-sans);font-size:12px;font-weight:500;
  letter-spacing:.06em;color:var(--c-text2);
  transition:color .15s;
}
.gnav a:hover,.gnav a.current{color:var(--c-acc)}

/* ── BREADCRUMB ────────────────────────────── */
.breadcrumb{
  max-width:var(--max-w);margin:0 auto;
  padding:16px 40px;
  display:flex;gap:8px;align-items:center;
  font-family:var(--f-sans);font-size:11px;color:var(--c-text3);
  border-bottom:1px solid var(--c-bdr);
}
.breadcrumb a{color:var(--c-acc)}
.breadcrumb span{color:var(--c-text3)}

/* ── BUTTONS ───────────────────────────────── */
.btn{
  display:inline-block;font-family:var(--f-sans);font-size:12px;
  font-weight:600;letter-spacing:.08em;
  padding:13px 32px;border-radius:2px;
  transition:background .15s,opacity .15s;cursor:pointer;border:none;
}
.btn-primary{background:var(--c-acc);color:#fff}
.btn-primary:hover{background:var(--c-acc-dim)}
.btn-outline{background:transparent;border:1px solid var(--c-bdr);color:var(--c-text2)}
.btn-outline:hover{border-color:var(--c-acc);color:var(--c-acc)}

/* ── CATEGORY BADGE ────────────────────────── */
.badge{
  display:inline-block;font-family:var(--f-sans);font-size:10px;
  font-weight:600;letter-spacing:.1em;text-transform:uppercase;
  color:var(--c-acc);background:var(--c-acc-l);
  padding:3px 9px;border-radius:2px;
}

/* ══════════════════════════════════════════════
   PAGE 1: TOP
══════════════════════════════════════════════ */

/* ── HERO ───────────────────────────────────── */
.hero{
  background:var(--c-bg);
  border-bottom:1px solid var(--c-rule);
  padding:88px 40px 80px;
}
.hero-inner{max-width:var(--max-w);margin:0 auto}
.hero-eyebrow{
  font-family:var(--f-serif);font-style:italic;font-size:13px;
  color:var(--c-text3);margin-bottom:28px;
  display:flex;align-items:center;gap:12px;
}
.hero-eyebrow::before{
  content:'';width:32px;height:1px;background:var(--c-rule);display:block;flex-shrink:0;
}
.hero-h1{
  font-family:var(--f-serif);font-size:clamp(30px,4.5vw,54px);
  font-weight:700;line-height:1.3;color:var(--c-text);
  margin-bottom:24px;letter-spacing:-.01em;
}
.hero-desc{
  font-family:var(--f-sans);font-size:15px;font-weight:300;
  line-height:2;color:var(--c-text2);
  max-width:560px;margin-bottom:44px;
}
.hero-cta{display:flex;gap:16px;align-items:center;flex-wrap:wrap}
.hero-sub-link{
  font-family:var(--f-sans);font-size:12px;font-weight:500;
  color:var(--c-acc);letter-spacing:.04em;
}
.hero-sub-link:hover{text-decoration:underline}

/* ── FEATURES ───────────────────────────────── */
.features{
  padding:80px 40px;
  background:var(--c-bg2);
  border-bottom:1px solid var(--c-rule);
}
.features-inner{max-width:var(--max-w);margin:0 auto}
.section-eyebrow{
  font-family:var(--f-serif);font-style:italic;font-size:13px;
  color:var(--c-text3);margin-bottom:10px;
}
.section-title{
  font-family:var(--f-serif);font-size:clamp(22px,3vw,32px);
  font-weight:700;color:var(--c-text);margin-bottom:48px;
}
.feat-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:28px}
.feat-card{
  background:var(--c-bg);padding:32px 28px;
  border:1px solid var(--c-bdr);
  border-top:2px solid var(--c-acc);
}
.feat-num{
  font-family:var(--f-sans);font-size:10px;font-weight:600;
  letter-spacing:.16em;color:var(--c-acc);margin-bottom:16px;
}
.feat-title{
  font-family:var(--f-serif);font-size:17px;font-weight:700;
  color:var(--c-text);margin-bottom:12px;line-height:1.4;
}
.feat-text{
  font-family:var(--f-sans);font-size:13px;font-weight:300;
  line-height:1.9;color:var(--c-text2);
}
.feat-note{
  margin-top:22px;font-family:var(--f-sans);font-size:11px;
  color:var(--c-text3);line-height:1.7;
}

/* ── LATEST ARTICLES (TOP) ──────────────────── */
.latest-articles{padding:80px 40px;background:var(--c-bg)}
.latest-inner{max-width:var(--max-w);margin:0 auto}
.latest-head{
  display:flex;justify-content:space-between;align-items:flex-end;
  margin-bottom:36px;
}
.latest-more{
  font-family:var(--f-sans);font-size:12px;font-weight:500;
  color:var(--c-acc);letter-spacing:.04em;
}
.latest-more:hover{text-decoration:underline}
.card-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}

/* ── ARTICLE CARD ───────────────────────────── */
.art-card{
  background:var(--c-bg2);
  border:1px solid var(--c-bdr);
  overflow:hidden;
  transition:transform .2s var(--ease),box-shadow .2s var(--ease);
}
.art-card:hover{transform:translateY(-4px);box-shadow:0 8px 24px rgba(0,0,0,.07)}
.art-thumb{
  width:100%;aspect-ratio:16/9;background:var(--c-bg3);
  display:flex;align-items:center;justify-content:center;
  overflow:hidden;
  border-bottom:1px solid var(--c-bdr);
}
.art-thumb img{width:100%;height:100%;object-fit:cover}
.art-body{padding:20px 22px}
.art-meta{display:flex;align-items:center;gap:10px;margin-bottom:10px}
.art-date{font-family:var(--f-sans);font-size:10px;color:var(--c-text3);letter-spacing:.04em}
.art-title{
  font-family:var(--f-serif);font-size:14px;font-weight:700;
  color:var(--c-text);line-height:1.55;margin-bottom:8px;
}
.art-card:hover .art-title{color:var(--c-acc)}

/* ── SITE FOOTER ────────────────────────────── */
.site-footer{
  background:var(--c-bg2);border-top:1px solid var(--c-rule);
  padding:40px 40px;
}
.footer-inner{
  max-width:var(--max-w);margin:0 auto;
  display:flex;justify-content:space-between;align-items:center;
  flex-wrap:wrap;gap:16px;
}
.footer-logo{font-family:var(--f-serif);font-size:15px;font-weight:700;color:var(--c-text)}
.footer-links{display:flex;gap:24px;list-style:none}
.footer-links a{font-family:var(--f-sans);font-size:11px;color:var(--c-text3)}
.footer-links a:hover{color:var(--c-acc)}
.footer-copy{
  width:100%;margin-top:20px;padding-top:20px;
  border-top:1px solid var(--c-bdr);
  font-family:var(--f-sans);font-size:11px;color:var(--c-text3);
}

/* ══════════════════════════════════════════════
   PAGE 2: COLUMN LIST
══════════════════════════════════════════════ */
.page-head{
  background:var(--c-bg);
  border-bottom:1px solid var(--c-bdr);
  padding:40px 40px 36px;
}
.page-head-inner{max-width:var(--max-w);margin:0 auto}
.page-heading{
  font-family:var(--f-serif);font-size:clamp(24px,3.5vw,36px);
  font-weight:700;color:var(--c-text);margin-bottom:24px;
}
.cat-tabs{display:flex;gap:0;flex-wrap:wrap}
.cat-tab{
  font-family:var(--f-sans);font-size:12px;font-weight:500;
  letter-spacing:.04em;color:var(--c-text2);
  padding:8px 18px;border:1px solid var(--c-bdr);
  margin-right:-1px;cursor:pointer;background:var(--c-bg);
  transition:all .15s;text-decoration:none;display:inline-block;
}
.cat-tab:first-child{border-radius:2px 0 0 2px}
.cat-tab:last-child{border-radius:0 2px 2px 0;margin-right:0}
.cat-tab:hover{background:var(--c-bg2)}
.cat-tab.active,.cat-tab[aria-current="page"]{background:var(--c-acc);color:#fff;border-color:var(--c-acc)}

.col-layout{
  max-width:var(--max-w);margin:0 auto;
  display:grid;grid-template-columns:1fr 280px;gap:48px;
  padding:48px 40px;align-items:start;
}
.col-list-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:24px;margin-bottom:40px}

/* ── PAGINATION ─────────────────────────────── */
.pagination,
.navigation.pagination{
  display:flex;gap:0;justify-content:center;align-items:center;
}
/* WordPress が出力する .nav-links に対応 */
.navigation.pagination .nav-links{display:flex;gap:0}
.pagination a,.pagination span,
.navigation.pagination .page-numbers{
  display:flex;align-items:center;justify-content:center;
  width:36px;height:36px;
  font-family:var(--f-sans);font-size:12px;
  border:1px solid var(--c-bdr);margin-right:-1px;
  color:var(--c-text2);transition:all .15s;
}
.pagination a:hover,
.navigation.pagination a.page-numbers:hover{background:var(--c-bg2)}
.pagination .current,.pagination span.current,
.navigation.pagination .page-numbers.current{background:var(--c-acc);color:#fff;border-color:var(--c-acc)}
/* 前/次ページのドットドット */
.navigation.pagination .page-numbers.dots{border:none;width:auto;padding:0 4px}

/* ── SIDEBAR ─────────────────────────────────── */
.sidebar{position:sticky;top:calc(64px + 20px)}
.sidebar-widget{margin-bottom:32px}
.sidebar-title{
  font-family:var(--f-serif);font-size:14px;font-weight:700;
  color:var(--c-text);padding-bottom:10px;
  border-bottom:2px solid var(--c-acc);margin-bottom:16px;
}
.sidebar-cat-list{list-style:none}
.sidebar-cat-list li{border-bottom:1px solid var(--c-bdr)}
.sidebar-cat-list a{
  display:flex;justify-content:space-between;align-items:center;
  padding:10px 0;font-family:var(--f-sans);font-size:13px;
  color:var(--c-text2);transition:color .15s;
}
.sidebar-cat-list a:hover{color:var(--c-acc)}
.sidebar-cat-list .count{
  font-size:11px;color:var(--c-text3);
  background:var(--c-bg3);padding:1px 7px;border-radius:10px;
}
.sidebar-popular .pop-item{
  display:flex;gap:12px;padding:12px 0;
  border-bottom:1px solid var(--c-bdr);
}
.sidebar-popular .pop-num{
  font-family:var(--f-serif);font-size:18px;font-weight:700;
  color:var(--c-bg3);flex-shrink:0;min-width:24px;line-height:1.2;
}
.sidebar-popular .pop-title{
  font-family:var(--f-sans);font-size:12px;font-weight:500;
  color:var(--c-text2);line-height:1.6;
}
.sidebar-popular a:hover .pop-title{color:var(--c-acc)}

/* ══════════════════════════════════════════════
   PAGE 3: COLUMN DETAIL
══════════════════════════════════════════════ */
.article-layout{
  max-width:var(--max-w);margin:0 auto;
  display:grid;grid-template-columns:1fr 280px;gap:56px;
  padding:48px 40px;align-items:start;
}
.article-header{margin-bottom:32px}
.article-cat{margin-bottom:14px}
.article-title{
  font-family:var(--f-serif);font-size:clamp(22px,3.5vw,34px);
  font-weight:700;color:var(--c-text);line-height:1.4;
  margin-bottom:16px;
}
.article-meta{
  display:flex;gap:16px;align-items:center;
  font-family:var(--f-sans);font-size:11px;color:var(--c-text3);
  padding-bottom:16px;border-bottom:1px solid var(--c-bdr);
}
.article-hero-img{
  width:100%;aspect-ratio:16/9;background:var(--c-bg3);
  overflow:hidden;border:1px solid var(--c-bdr);
  margin-bottom:36px;
}
.article-hero-img img{width:100%;height:100%;object-fit:cover}

/* ── TOC ────────────────────────────────────── */
.toc{
  background:var(--c-bg2);border:1px solid var(--c-bdr);
  border-left:3px solid var(--c-acc);
  padding:24px 28px;margin-bottom:40px;
}
.toc-title{
  font-family:var(--f-serif);font-size:13px;font-weight:700;
  color:var(--c-text);margin-bottom:12px;
  display:flex;align-items:center;gap:8px;
}
.toc-title::before{content:'';width:16px;height:2px;background:var(--c-acc);display:block}
.toc ol{list-style:none;counter-reset:toc}
.toc ol li{
  counter-increment:toc;
  padding:5px 0;border-bottom:1px solid var(--c-bdr);
}
.toc ol li:last-child{border-bottom:none}
.toc ol li::before{
  content:counter(toc)'. ';
  font-family:var(--f-sans);font-size:11px;
  color:var(--c-acc);font-weight:600;
}
.toc a{font-family:var(--f-sans);font-size:12px;color:var(--c-text2)}
.toc a:hover{color:var(--c-acc)}
.toc .toc-sub{
  padding-left:20px;margin-top:4px;
  list-style:none;
}
.toc .toc-sub li{border-bottom:none;padding:3px 0}
.toc .toc-sub li::before{content:'— ';color:var(--c-text3)}

/* ── ARTICLE BODY ───────────────────────────── */
.article-body{font-family:var(--f-sans);font-size:15px;font-weight:300;line-height:2;color:var(--c-text2)}
.article-body h2{
  font-family:var(--f-serif);font-size:22px;font-weight:700;
  color:var(--c-text);margin:48px 0 18px;
  padding-bottom:10px;border-bottom:1px solid var(--c-bdr);
}
.article-body h3{
  font-family:var(--f-serif);font-size:17px;font-weight:700;
  color:var(--c-text);margin:32px 0 12px;
}
.article-body p{margin-bottom:20px}
.article-body strong{font-weight:700;color:var(--c-text)}
.article-body em{font-style:italic;color:var(--c-text)}
.article-body sup{font-size:10px;color:var(--c-acc);cursor:pointer}
.article-body .chart-wrap{
  margin:36px 0;padding:28px;
  background:var(--c-bg2);border:1px solid var(--c-bdr);
}
.article-body .chart-caption{
  font-family:var(--f-sans);font-size:11px;color:var(--c-text3);
  margin-top:12px;text-align:center;
}
.article-body .chart-wrap canvas{max-height:300px}
.article-body .footnotes{
  margin-top:40px;padding-top:20px;
  border-top:1px solid var(--c-bdr);
}
.article-body .footnotes p{
  font-family:var(--f-sans);font-size:11px;color:var(--c-text3);
  line-height:1.7;margin-bottom:6px;
}

/* ── SNS SHARE ──────────────────────────────── */
.share-section{
  margin-top:40px;padding:24px 0;
  border-top:1px solid var(--c-bdr);border-bottom:1px solid var(--c-bdr);
}
.share-label{
  font-family:var(--f-sans);font-size:11px;font-weight:600;
  letter-spacing:.12em;text-transform:uppercase;
  color:var(--c-text3);margin-bottom:14px;
}
.share-btns{display:flex;gap:12px}
.share-btn{
  display:inline-flex;align-items:center;gap:7px;
  font-family:var(--f-sans);font-size:12px;font-weight:500;
  padding:9px 20px;border:1px solid var(--c-bdr);border-radius:2px;
  color:var(--c-text2);transition:all .15s;
}
.share-btn:hover{border-color:var(--c-acc);color:var(--c-acc)}

/* ── RELATED ARTICLES ───────────────────────── */
.related{margin-top:40px}
.related-title{
  font-family:var(--f-serif);font-size:16px;font-weight:700;
  color:var(--c-text);margin-bottom:20px;padding-bottom:10px;
  border-bottom:2px solid var(--c-acc);
}
.related-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}

/* ── SIDEBAR TOC (article) ──────────────────── */
.sidebar-toc{
  position:sticky;top:calc(64px + 20px);
  background:var(--c-bg2);border:1px solid var(--c-bdr);
  border-top:2px solid var(--c-acc);padding:22px 20px;
}
.sidebar-toc-title{
  font-family:var(--f-serif);font-size:13px;font-weight:700;
  color:var(--c-text);margin-bottom:12px;
}
.sidebar-toc ol{list-style:none;counter-reset:stoc}
.sidebar-toc ol li{
  counter-increment:stoc;
  padding:6px 0;border-bottom:1px solid var(--c-bdr);font-size:12px;
}
.sidebar-toc ol li:last-child{border-bottom:none}
.sidebar-toc ol li::before{content:counter(stoc)'. ';color:var(--c-acc);font-size:11px;font-weight:600}
.sidebar-toc a{font-family:var(--f-sans);font-size:12px;color:var(--c-text2);line-height:1.5}
.sidebar-toc a:hover{color:var(--c-acc)}

/* ── SCROLL REVEAL ──────────────────────────── */
.reveal{opacity:0;transform:translateY(20px);transition:opacity .6s var(--ease),transform .6s var(--ease)}
.reveal.visible{opacity:1;transform:none}

/* ── RESPONSIVE ─────────────────────────────── */
@media(max-width:960px){
  .col-layout,.article-layout{grid-template-columns:1fr;padding:32px 24px}
  .col-list-grid{grid-template-columns:1fr}
  .card-grid,.feat-grid,.related-grid{grid-template-columns:1fr}
  .sidebar,.sidebar-toc{position:static}
  .header-inner{padding:0 24px}
  .hero{padding:64px 24px 56px}
  .features,.latest-articles,.site-footer{padding:56px 24px}
  .page-head{padding:28px 24px 24px}
  .breadcrumb{padding:12px 24px}
}
@media(max-width:640px){
  .gnav li:not(:last-child){display:none}
  .hero-h1{line-height:1.4}
  .feat-grid{grid-template-columns:1fr}
}