/* ========== ARTICLE PAGE STYLES ========== */
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
:root{
  --color-bg:#FAFBFE;
  --color-surface:#FFFFFF;
  --color-surface-alt:#F3F5FA;
  --color-primary:#2563EB;
  --color-primary-light:#DBEAFE;
  --color-primary-dark:#1D4ED8;
  --color-accent:#F59E0B;
  --color-text:#0F172A;
  --color-text-secondary:#475569;
  --color-text-tertiary:#94A3B8;
  --color-border:#E2E8F0;
  --radius-sm:8px;
  --radius-md:12px;
  --radius-lg:16px;
  --font-sans:'Noto Sans JP','Plus Jakarta Sans',system-ui,sans-serif;
  --font-display:'Plus Jakarta Sans','Noto Sans JP',sans-serif;
  --shadow-md:0 4px 12px rgba(0,0,0,0.06);
  --shadow-lg:0 12px 40px rgba(0,0,0,0.08);
  --transition-fast:0.2s cubic-bezier(0.4,0,0.2,1);
  --max-w:760px;
}
html{scroll-behavior:smooth}
body{font-family:var(--font-sans);background:var(--color-bg);color:var(--color-text);line-height:1.8;-webkit-font-smoothing:antialiased}

/* NAV */
.nav{position:fixed;top:0;left:0;right:0;z-index:100;background:rgba(250,251,254,0.9);backdrop-filter:blur(20px);border-bottom:1px solid var(--color-border);height:60px}
.nav-inner{max-width:1120px;margin:0 auto;padding:0 24px;display:flex;align-items:center;justify-content:space-between;height:100%}
.nav-logo{font-family:var(--font-display);font-weight:800;font-size:18px;color:var(--color-text);display:flex;align-items:center;gap:6px;text-decoration:none}
.nav-logo .dot{width:7px;height:7px;border-radius:50%;background:var(--color-primary)}
.nav-logo span{color:var(--color-primary)}
.nav-links{display:flex;gap:8px;align-items:center}
.nav-links a{font-size:13px;font-weight:500;color:var(--color-text-secondary);padding:6px 12px;border-radius:var(--radius-sm);transition:all var(--transition-fast);text-decoration:none}
.nav-links a:hover{color:var(--color-primary);background:var(--color-primary-light)}
.nav-cta{font-size:12px!important;font-weight:600!important;color:#fff!important;background:var(--color-primary)!important;padding:6px 16px!important}
.nav-cta:hover{background:var(--color-primary-dark)!important}

/* ARTICLE MAIN */
.article-main{max-width:var(--max-w);margin:0 auto;padding:100px 24px 60px}

/* BREADCRUMB */
.breadcrumb{font-size:13px;color:var(--color-text-tertiary);margin-bottom:24px;display:flex;align-items:center;gap:6px;flex-wrap:wrap}
.breadcrumb a{color:var(--color-text-tertiary);text-decoration:none;transition:color var(--transition-fast)}
.breadcrumb a:hover{color:var(--color-primary)}
.breadcrumb .current{color:var(--color-text-secondary)}
.breadcrumb span{font-size:11px}

/* HEADER */
.article-header{margin-bottom:40px}
.article-meta-top{display:flex;align-items:center;gap:12px;margin-bottom:16px}
.article-cat-badge{font-size:12px;font-weight:700;color:var(--color-primary);background:var(--color-primary-light);padding:4px 12px;border-radius:100px}
.article-meta-top time{font-size:13px;color:var(--color-text-tertiary)}
.article-header h1{font-family:var(--font-display);font-size:clamp(24px,4vw,36px);font-weight:800;letter-spacing:-0.02em;line-height:1.4;margin-bottom:16px}
.article-tags{display:flex;gap:6px;flex-wrap:wrap}
.article-tag{font-size:12px;color:var(--color-text-tertiary);background:var(--color-surface-alt);padding:4px 10px;border-radius:100px}

/* TOC */
.article-toc{background:var(--color-surface);border:1.5px solid var(--color-border);border-radius:var(--radius-md);padding:20px 24px;margin-bottom:40px}
.article-toc:empty{display:none}
.toc-title{font-size:14px;font-weight:700;margin-bottom:12px;color:var(--color-text)}
.toc-list{padding-left:20px;display:flex;flex-direction:column;gap:6px}
.toc-list li{font-size:14px}
.toc-list li a{color:var(--color-text-secondary);text-decoration:none;transition:color var(--transition-fast)}
.toc-list li a:hover{color:var(--color-primary)}
.toc-sub{padding-left:16px;font-size:13px}

/* CONTENT */
.article-content{line-height:1.9}
.article-content article{display:contents}
.article-content h2{font-family:var(--font-display);font-size:22px;font-weight:800;margin:48px 0 16px;padding-bottom:8px;border-bottom:2px solid var(--color-primary-light);color:var(--color-text)}
.article-content h3{font-size:18px;font-weight:700;margin:32px 0 12px;padding-left:12px;border-left:3px solid var(--color-primary);color:var(--color-text)}
.article-content p{margin-bottom:20px;color:var(--color-text-secondary);font-size:15px}
.article-content ul,.article-content ol{margin:16px 0 24px 20px;color:var(--color-text-secondary)}
.article-content li{margin-bottom:8px;font-size:15px}
.article-content strong{color:var(--color-text);font-weight:600}
.article-content blockquote{border-left:3px solid var(--color-primary);background:var(--color-primary-light);padding:16px 20px;margin:24px 0;border-radius:0 var(--radius-sm) var(--radius-sm) 0;font-size:14px;color:var(--color-text-secondary)}

/* AFFILIATE LINK */
.aff-link{color:var(--color-primary);font-weight:600;text-decoration:none;border-bottom:1px dashed var(--color-primary);transition:all var(--transition-fast)}
.aff-link:hover{color:var(--color-primary-dark);border-bottom-style:solid}

/* CTA BOX */
.article-cta-box{background:linear-gradient(135deg,#EFF6FF,#F3E8FF);border:1.5px solid var(--color-primary-light);border-radius:var(--radius-lg);padding:32px;margin:48px 0;text-align:center}
.article-cta-box h3{font-size:18px;font-weight:700;margin-bottom:8px}
.article-cta-box p{font-size:14px;color:var(--color-text-secondary);margin-bottom:20px}
.cta-links{display:flex;flex-direction:column;gap:10px;max-width:360px;margin:0 auto}
.cta-link-btn{display:block;font-size:14px;font-weight:600;color:#fff;background:var(--color-primary);padding:12px 24px;border-radius:var(--radius-sm);text-decoration:none;transition:all var(--transition-fast)}
.cta-link-btn:hover{background:var(--color-primary-dark);transform:translateY(-1px);box-shadow:0 4px 12px rgba(37,99,235,0.3)}

/* SHARE */
.article-share{text-align:center;padding:32px 0;border-top:1px solid var(--color-border);margin-top:48px}
.article-share p{font-size:14px;font-weight:600;margin-bottom:12px}
.share-buttons{display:flex;gap:10px;justify-content:center}
.share-btn{font-size:13px;font-weight:600;padding:8px 20px;border-radius:var(--radius-sm);text-decoration:none;transition:all var(--transition-fast)}
.share-x{color:#fff;background:#0F1419}
.share-x:hover{background:#1D9BF0}
.share-fb{color:#fff;background:#1877F2}
.share-fb:hover{background:#0D6EFD}
.share-hatena{color:#fff;background:#00A4DE}
.share-hatena:hover{background:#0090C4}

/* FOOTER */
.footer{background:var(--color-text);color:rgba(255,255,255,0.6);padding:40px 24px}
.footer-inner-simple{max-width:var(--max-w);margin:0 auto;text-align:center}
.footer-logo{font-family:var(--font-display);font-size:18px;font-weight:800;color:#fff;margin-bottom:12px}
.footer-logo span{color:var(--color-primary)}
.footer-inner-simple p{font-size:12px;margin-bottom:4px}
.disclaimer{font-size:11px;color:rgba(255,255,255,0.4);margin-top:8px}

/* RESPONSIVE */
@media(max-width:768px){
  .article-main{padding:80px 16px 40px}
  .article-header h1{font-size:22px}
  .nav-links{display:none}
  .share-buttons{flex-direction:column;align-items:center}
  .cta-links{max-width:100%}
}