/* Notion Design System - sdgs-ai blog */
:root {
  --notion-font-sans: 'Inter', system-ui, 'Noto Sans JP', -apple-system, BlinkMacSystemFont, sans-serif;
  --notion-bg: #0a0a0c;
  --notion-surface: rgba(18, 18, 22, 0.94);
  --notion-surface-soft: rgba(0, 255, 136, 0.08);
  --notion-text: #fafafa;
  --notion-muted: #a1a1aa;
  --notion-border: rgba(255, 255, 255, 0.12);
  --notion-primary: #00ff88;
  --notion-primary-dark: #00d4ff;
  --notion-accent: #ff0080;
  --notion-radius: 8px;
  --notion-shadow: 0 16px 38px rgba(0, 255, 136, 0.12);
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body.blog-page { margin: 0; font-family: var(--notion-font-sans); color: var(--notion-text); background: radial-gradient(circle at top left, rgba(0,255,136,.16), transparent 32rem), radial-gradient(circle at top right, rgba(255,0,128,.14), transparent 30rem), var(--notion-bg); line-height: 1.75; }
a { color: inherit; text-decoration: none; }
a:hover { color: var(--notion-primary); }
img { max-width: 100%; display: block; }
.skip-link { position: absolute; left: -9999px; top: 1rem; background: var(--notion-primary); color: #050506; padding: .75rem 1rem; z-index: 999; }
.skip-link:focus { left: 1rem; }
.blog-container { width: min(1120px, calc(100% - 32px)); margin: 0 auto; }
.blog-site-header { position: sticky; top: 0; z-index: 20; background: rgba(10,10,12,.86); backdrop-filter: blur(18px); border-bottom: 1px solid var(--notion-border); }
.header-inner { min-height: 72px; display: flex; align-items: center; justify-content: space-between; gap: 24px; }
.blog-logo { display: inline-flex; align-items: center; gap: 12px; font-weight: 900; letter-spacing: -.02em; }
.logo-mark { display: grid; place-items: center; width: 38px; height: 38px; border-radius: var(--notion-radius); background: linear-gradient(135deg, var(--notion-accent), var(--notion-primary), var(--notion-primary-dark)); color: #050506; box-shadow: 0 8px 22px rgba(0,255,136,.28); }
.blog-nav { display: flex; gap: 10px; flex-wrap: wrap; justify-content: flex-end; }
.blog-nav a { padding: 8px 12px; border-radius: var(--notion-radius); color: var(--notion-muted); font-weight: 700; }
.blog-nav a:hover, .blog-nav a[aria-current="page"] { background: var(--notion-surface-soft); color: var(--notion-primary); }
.blog-hero { padding: 76px 0 48px; border-bottom: 1px solid var(--notion-border); }
.blog-hero h1 { margin: 0; font-size: clamp(2.2rem, 6vw, 4.7rem); line-height: 1.05; letter-spacing: -.06em; }
.blog-hero p { max-width: 780px; color: var(--notion-muted); font-size: 1.08rem; }
.eyebrow { color: var(--notion-primary); font-weight: 900; text-transform: uppercase; letter-spacing: .12em; font-size: .78rem; margin-bottom: .75rem; }
.blog-layout { display: grid; grid-template-columns: minmax(0, 1fr) 300px; gap: 32px; align-items: start; padding: 40px 0 72px; }
.section-heading { margin-bottom: 20px; }
.section-heading span { color: var(--notion-primary); font-size: .78rem; font-weight: 900; letter-spacing: .1em; text-transform: uppercase; }
.section-heading h2 { margin: .25rem 0 0; font-size: 1.65rem; letter-spacing: -.03em; }
.blog-list { display: grid; gap: 18px; }
.blog-card, .sidebar-card, .article-main { background: var(--notion-surface); border: 1px solid var(--notion-border); border-radius: var(--notion-radius); box-shadow: 0 1px 2px rgba(0,0,0,.2); }
.blog-card { display: grid; grid-template-columns: 220px minmax(0, 1fr); overflow: hidden; transition: transform .18s ease, box-shadow .18s ease, border-color .18s ease; }
.blog-card:hover { transform: translateY(-3px); box-shadow: var(--notion-shadow); border-color: rgba(0,255,136,.35); }
.blog-card-media { min-height: 156px; background: var(--notion-surface-soft); }
.blog-card-media img { width: 100%; height: 100%; object-fit: cover; }
.blog-card-body { padding: 20px; }
.blog-card-meta { color: var(--notion-muted); font-size: .84rem; font-weight: 700; margin-bottom: 6px; }
.blog-card h2 { margin: 0 0 8px; font-size: 1.25rem; line-height: 1.45; letter-spacing: -.03em; }
.blog-card p { margin: 0 0 14px; color: var(--notion-muted); font-size: .95rem; }
.read-more { display: inline-flex; align-items: center; gap: 6px; color: var(--notion-primary); font-weight: 900; }
.blog-sidebar { position: sticky; top: 96px; display: grid; gap: 16px; }
.sidebar-card { padding: 18px; }
.sidebar-card h3 { margin: 0 0 12px; font-size: 1rem; }
.ad-card { min-height: 170px; display: grid; place-items: center; text-align: center; background: linear-gradient(145deg, rgba(0,255,136,.12), rgba(255,0,128,.08)); border-style: dashed; }
.ad-card-top { order: -1; }
.ad-label { display: inline-flex; padding: 3px 8px; border-radius: 999px; background: rgba(0,255,136,.16); color: var(--notion-primary); font-size: .72rem; font-weight: 900; }
.recent-list, .toc ul { list-style: none; padding: 0; margin: 0; display: grid; gap: 10px; }
.recent-list a, .toc a { color: var(--notion-muted); font-weight: 700; }
.tag-cloud { display: flex; flex-wrap: wrap; gap: 8px; }
.tag-cloud a { padding: 6px 10px; border: 1px solid var(--notion-border); border-radius: 999px; background: rgba(255,255,255,.04); color: var(--notion-muted); font-size: .85rem; }
.sitenavi-slot { background: rgba(255,255,255,.035); color: var(--notion-muted); font-size: .9rem; }
.article-main { overflow: hidden; }
.article-header { padding: 32px 32px 0; }
.article-header h1 { margin: 0 0 12px; font-size: clamp(2rem, 4vw, 3.5rem); line-height: 1.16; letter-spacing: -.05em; }
.article-meta { color: var(--notion-muted); font-weight: 800; }
.article-hero-image { width: 100%; max-height: 430px; object-fit: cover; border-radius: var(--notion-radius); margin-top: 20px; }
.article-content { padding: 32px; font-size: 1.02rem; }
.article-content h2 { margin-top: 2.2rem; padding-bottom: .45rem; border-bottom: 1px solid var(--notion-border); }
.article-content a { color: var(--notion-primary); text-decoration: underline; text-underline-offset: 3px; }
.blog-footer { border-top: 1px solid var(--notion-border); background: rgba(18,18,22,.9); padding: 28px 0; }
.footer-inner { display: flex; align-items: center; justify-content: space-between; gap: 18px; flex-wrap: wrap; color: var(--notion-muted); font-size: .92rem; }
.footer-inner nav { display: flex; gap: 14px; flex-wrap: wrap; }
@media (max-width: 768px) {
  .header-inner, .footer-inner { align-items: flex-start; flex-direction: column; }
  .blog-nav { justify-content: flex-start; }
  .blog-hero { padding: 52px 0 36px; }
  .blog-layout { grid-template-columns: 1fr; padding-top: 28px; }
  .blog-sidebar { position: static; }
  .blog-card { grid-template-columns: 1fr; }
  .blog-card-media { min-height: 210px; }
  .article-header, .article-content { padding: 24px; }
}