/* Notion Design System - soundproofing-construction blog */
:root {
  --blog-font-sans: 'Inter', 'Noto Sans JP', system-ui, -apple-system, BlinkMacSystemFont, sans-serif;
  --notion-bg: #f7f8fb;
  --notion-surface: #ffffff;
  --notion-surface-soft: #f1f5f9;
  --notion-text: #1f2937;
  --notion-muted: #64748b;
  --notion-border: rgba(15, 23, 42, 0.10);
  --notion-accent: var(--cyan-accent, #00c2e0);
  --notion-accent-dark: #087c94;
  --notion-radius: 8px;
  --notion-shadow: 0 12px 32px rgba(10, 22, 40, 0.08);
}

body { font-family: var(--blog-font-sans); background: var(--notion-bg); }
.skip-link { position: absolute; top: -48px; left: 16px; z-index: 2000; padding: 10px 14px; border-radius: var(--notion-radius); background: var(--notion-accent); color: #001018; font-weight: 700; }
.skip-link:focus { top: 16px; }
.breadcrumb { max-width: var(--max-width, 1200px); margin: 0 auto; padding: 18px 20px 0; color: var(--notion-muted); font-size: 0.92rem; }
.breadcrumb a { color: var(--notion-accent-dark); }
.blog-main { padding: 32px 20px 72px; background: radial-gradient(circle at 18% 0%, rgba(0, 194, 224, 0.14), transparent 28%), linear-gradient(180deg, #ffffff 0%, var(--notion-bg) 42%); }
.blog-hero { max-width: var(--max-width, 1200px); margin: 0 auto 28px; padding: 34px; border: 1px solid var(--notion-border); border-radius: 16px; background: rgba(255, 255, 255, 0.86); box-shadow: var(--notion-shadow); }
.eyebrow { margin: 0 0 10px; color: var(--notion-accent-dark); font-size: 0.78rem; font-weight: 800; letter-spacing: 0.12em; text-transform: uppercase; }
.blog-hero h1, .article-header-block h1 { margin: 0 0 14px; border: 0; padding: 0; color: var(--notion-text); font-family: var(--blog-font-sans); font-size: clamp(2rem, 4vw, 3.3rem); line-height: 1.14; letter-spacing: -0.04em; }
.blog-hero p:last-child { max-width: 760px; margin: 0; color: var(--notion-muted); font-size: 1.02rem; }
.blog-layout { display: grid; grid-template-columns: minmax(0, 1fr) 300px; gap: 28px; align-items: start; max-width: var(--max-width, 1200px); margin: 0 auto; }
.blog-content-column, .article-shell, .sidebar-card { border: 1px solid var(--notion-border); border-radius: var(--notion-radius); background: var(--notion-surface); box-shadow: 0 2px 10px rgba(15, 23, 42, 0.04); }
.blog-content-column { padding: 24px; }
.section-heading { display: flex; align-items: end; justify-content: space-between; gap: 16px; margin-bottom: 20px; border-bottom: 1px solid var(--notion-border); padding-bottom: 16px; }
.section-heading span { color: var(--notion-muted); font-size: 0.86rem; font-weight: 700; }
.section-heading h2 { margin: 0; border: 0; padding: 0; color: var(--notion-text); font-size: 1.5rem; }
.blog-grid { display: grid; gap: 16px; }
.blog-card { display: grid; grid-template-columns: 220px minmax(0, 1fr); overflow: hidden; border: 1px solid var(--notion-border); border-radius: var(--notion-radius); background: #fff; transition: transform 0.18s ease, border-color 0.18s ease, box-shadow 0.18s ease; }
.blog-card:hover { transform: translateY(-2px); border-color: rgba(0, 194, 224, 0.45); box-shadow: 0 14px 30px rgba(10, 22, 40, 0.10); }
.blog-card__media { display: block; min-height: 160px; background: var(--notion-surface-soft); }
.blog-card__media img { width: 100%; height: 100%; min-height: 160px; object-fit: cover; display: block; }
.blog-card__body { padding: 18px; }
.blog-card time, .article-meta { color: var(--notion-muted); font-size: 0.84rem; font-weight: 600; }
.blog-card h2 { margin: 8px 0 10px; border: 0; padding: 0; font-size: 1.18rem; line-height: 1.45; }
.blog-card h2 a, .sidebar-list a { color: var(--notion-text); }
.blog-card p { margin: 0 0 14px; color: var(--notion-muted); font-size: 0.94rem; line-height: 1.75; }
.read-more { display: inline-flex; align-items: center; color: var(--notion-accent-dark); font-weight: 800; font-size: 0.9rem; }
.blog-sidebar { display: grid; gap: 16px; position: sticky; top: calc(var(--header-height, 64px) + 16px); }
.sidebar-card { padding: 18px; }
.sidebar-card h3 { margin: 0 0 12px; color: var(--notion-text); font-size: 1rem; }
.sidebar-list { list-style: none; margin: 0; padding: 0; display: grid; gap: 10px; }
.sidebar-list li { margin: 0; padding-bottom: 10px; border-bottom: 1px solid var(--notion-border); font-size: 0.92rem; line-height: 1.55; }
.sidebar-list li:last-child { border-bottom: 0; padding-bottom: 0; }
.ad-card--amazon { background: linear-gradient(135deg, #0a1628, #123a58); color: #fff; border-color: rgba(0, 194, 224, 0.25); }
.ad-card--amazon p { color: rgba(255, 255, 255, 0.78); margin-bottom: 0; }
.ad-label { display: inline-flex; margin-bottom: 10px; padding: 3px 8px; border-radius: 9999px; background: rgba(255, 255, 255, 0.14); font-size: 0.72rem; font-weight: 800; }
.nav-ad { background: var(--notion-surface-soft); text-align: center; }
.nav-ad p { margin: 0 0 8px; color: var(--notion-muted); font-size: 0.78rem; font-family: ui-monospace, SFMono-Regular, Menlo, monospace; }
.article-shell { padding: 30px; }
.article-header-block { margin-bottom: 28px; border-bottom: 1px solid var(--notion-border); padding-bottom: 24px; }
.article-meta { display: flex; flex-wrap: wrap; gap: 8px 14px; margin-bottom: 20px; }
.article-hero-image { width: 100%; max-height: 430px; object-fit: cover; border-radius: var(--notion-radius); border: 1px solid var(--notion-border); }
.article-body { color: var(--notion-text); font-size: 1rem; line-height: 1.9; }
.article-body h2 { margin-top: 2.4rem; border-left: 4px solid var(--notion-accent); padding-left: 0.85rem; }
.article-body h3 { margin-top: 1.8rem; }
.article-body p { margin-bottom: 1.25rem; }
.share-buttons { margin-top: 36px; border-top: 1px solid var(--notion-border); padding-top: 20px; }
.share-buttons a { display: inline-flex; margin: 0 8px 8px 0; padding: 9px 13px; border: 1px solid var(--notion-border); border-radius: var(--notion-radius); background: var(--notion-surface-soft); color: var(--notion-text); font-weight: 700; }
@media (max-width: 768px) {
  .blog-main { padding: 20px 14px 48px; }
  .blog-hero { padding: 24px; }
  .blog-layout { grid-template-columns: 1fr; }
  .blog-sidebar { position: static; }
  .blog-card { grid-template-columns: 1fr; }
  .blog-card__media, .blog-card__media img { min-height: 210px; }
  .blog-content-column, .article-shell { padding: 18px; }
  .section-heading { display: block; }
}

/* === batch20 blog index cards === */
.blog-index-main { padding: 40px 0 72px; }
.blog-index-main .blog-hero { margin-bottom: 16px; }
.blog-index-main .blog-toolbar { margin: 8px 0 22px; }
.blog-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(268px, 1fr)); gap: 22px; align-items: stretch; }
.blog-card { overflow: hidden; }
.blog-card > a { padding: 0; display: flex; flex-direction: column; height: 100%; }
.card-thumb { aspect-ratio: 16 / 9; overflow: hidden; background: rgba(0,0,0,.05); }
.card-thumb img { width: 100%; height: 100%; object-fit: cover; display: block; transition: transform .35s ease; }
.blog-card:hover .card-thumb img { transform: scale(1.05); }
.card-body { padding: 16px 18px; }
.card-body time { display: block; font-size: .78rem; opacity: .65; margin-bottom: 6px; letter-spacing: .02em; }
.card-body h3 { margin: 0 0 6px; font-size: 1.05rem; line-height: 1.45; }
.card-body p { margin: 0; font-size: .85rem; line-height: 1.6; opacity: .82; }
.blog-card.no-thumb > a { padding: 18px; }
@media (max-width: 600px) { .blog-grid { grid-template-columns: 1fr; } }
/* === end batch20 === */