/* ============================================================
   ブログ（/blog/）専用スタイル — 読みやすさ最優先（本文17px・行間1.9）
============================================================ */
.blog-page { background: #FAFAF6; }
.blog-hero { padding-bottom: 80px; }
.blog-hero--cyan { background: #7FE0EE; }
.blog-hero--lime { background: #BEF06A; }
.blog-hero--pink { background: #F7A8C8; }
.blog-title {
  font-size: clamp(26px, 3.2vw, 42px);
  font-weight: 900;
  line-height: 1.35;
  letter-spacing: 0.02em;
  max-width: 900px;
  text-wrap: balance;
  margin-bottom: 18px;
}
.blog-meta {
  display: flex; flex-wrap: wrap; gap: 8px 22px;
  font-size: 13.5px; font-weight: 700; color: rgba(0, 0, 0, 0.72);
}
.blog-meta > span > span { font-weight: 500; opacity: 0.7; margin-right: 2px; }
.sp-only { display: none; }
/* 欧文・中文は見出し・コピーの<br>をそのまま改行として使う（語間が詰まらないように） */
html:not([lang="ja"]) .sp-only,
html:not([lang="ja"]) .blog-hero .ph-hero__copy br { display: inline; }

.blog-main { max-width: 760px; margin: 0 auto; padding: 56px 6vw 90px; }
.blog-main--index { max-width: 1100px; }
.blog-article { background: #fff; border: 3px solid var(--black); border-radius: 12px; box-shadow: 10px 10px 0 rgba(0, 0, 0, 0.12); padding: clamp(26px, 4vw, 52px); }
/* アイキャッチ（記事上部）と一覧カードのサムネ：高さを固定してガタつき（CLS）を防ぐ */
.blog-eyecatch { margin: -8px 0 26px; }
.blog-eyecatch__img { width: 100%; height: auto; aspect-ratio: 16 / 9; border-radius: 10px; border: 2px solid var(--black); display: block; }
.blog-card__thumb { display: block; margin: 4px -22px 4px; }
.blog-card__img { width: 100%; height: auto; aspect-ratio: 16 / 9; display: block; border-bottom: 2px solid var(--black); }
.blog-card__thumb + .blog-card__pillar { margin-top: 8px; }
.blog-lead { font-size: 17px; line-height: 1.9; font-weight: 500; color: #333; padding: 18px 22px; background: #FFFBD6; border-left: 6px solid var(--yellow); border-radius: 6px; margin-bottom: 30px; }

.blog-toc { border: 2px dashed rgba(0, 0, 0, 0.35); border-radius: 10px; padding: 18px 22px 16px; margin-bottom: 36px; background: #FAFAF6; }
.blog-toc__title { font-family: var(--font-en); font-style: italic; font-size: 13px; letter-spacing: 0.2em; margin-bottom: 8px; }
.blog-toc ol { list-style: decimal; padding-left: 26px; }
.blog-toc li { font-size: 15px; font-weight: 700; line-height: 1.7; padding: 3px 0; }
.blog-toc a { text-decoration: none; border-bottom: 2px solid var(--yellow); }

.blog-body { font-size: 17px; line-height: 1.95; }
.blog-body p { margin: 0 0 1.4em; }
.blog-body h2 { font-size: 24px; font-weight: 900; line-height: 1.45; margin: 2.2em 0 0.9em; padding-left: 16px; border-left: 8px solid var(--yellow); text-wrap: balance; }
.blog-body h3 { font-size: 19px; font-weight: 900; margin: 1.8em 0 0.7em; }
.blog-body h3::before { content: "■ "; color: var(--yellow-deep); }
.blog-body ul, .blog-body ol { margin: 0 0 1.5em; padding-left: 1.6em; }
.blog-body ul { list-style: disc; }
.blog-body ol { list-style: decimal; }
.blog-body li { margin: 0.35em 0; }
.blog-body strong { background: linear-gradient(transparent 60%, rgba(255, 237, 0, 0.75) 60%); padding: 0 2px; }
.blog-body blockquote { margin: 1.6em 0; padding: 16px 22px; background: #FAFAF6; border-left: 5px solid rgba(0, 0, 0, 0.25); font-weight: 500; }
.blog-body blockquote p { margin: 0; }
.blog-body hr { border: 0; border-top: 2px dashed rgba(0, 0, 0, 0.25); margin: 2.2em 0; }
.blog-body a { text-decoration: underline; text-decoration-color: var(--yellow-deep); text-decoration-thickness: 2px; }
.blog-body code { font-family: ui-monospace, Menlo, monospace; background: #F1F1EC; padding: 1px 6px; border-radius: 4px; font-size: 0.92em; }
.tbl { overflow-x: auto; margin: 0 0 1.6em; }
.blog-body table { border-collapse: collapse; width: 100%; font-size: 15px; line-height: 1.6; }
.blog-body th, .blog-body td { border: 1.5px solid rgba(0, 0, 0, 0.35); padding: 10px 12px; text-align: left; vertical-align: top; }
.blog-body th { background: var(--yellow); font-weight: 900; white-space: nowrap; }

.blog-faq { margin-top: 3em; }
.blog-faq h2 { font-size: 22px; font-weight: 900; margin-bottom: 14px; padding-left: 16px; border-left: 8px solid var(--yellow); }
.blog-faq__item { border: 2px solid var(--black); border-radius: 10px; margin-bottom: 10px; background: #fff; }
.blog-faq__item summary { cursor: pointer; font-weight: 900; font-size: 16px; line-height: 1.6; padding: 14px 18px 14px 44px; position: relative; list-style: none; }
.blog-faq__item summary::-webkit-details-marker { display: none; }
.blog-faq__item summary::before { content: "Q"; position: absolute; left: 14px; top: 13px; width: 22px; height: 22px; border-radius: 50%; background: var(--black); color: var(--yellow); font-family: var(--font-en); font-size: 12px; display: grid; place-items: center; }
.blog-faq__item p { padding: 0 18px 16px 44px; font-size: 15.5px; line-height: 1.85; }

.blog-author { display: flex; gap: 18px; align-items: flex-start; margin-top: 3em; padding: 22px; background: #FAFAF6; border-radius: 12px; border: 2px dashed rgba(0, 0, 0, 0.3); }
.blog-author__avatar { flex-shrink: 0; width: 56px; height: 56px; border-radius: 50%; background: var(--black); color: var(--yellow); font-weight: 900; font-size: 24px; display: grid; place-items: center; }
.blog-author__name { font-weight: 900; font-size: 16px; margin-bottom: 4px; }
.blog-author__desc { font-size: 14px; line-height: 1.8; color: #333; }
.blog-author__links { margin-top: 8px; font-size: 13.5px; font-weight: 700; }
.blog-author__links a { border-bottom: 2px solid var(--yellow); text-decoration: none; }

.blog-cta { margin-top: 2.4em; text-align: center; background: var(--black); color: #fff; border-radius: 14px; padding: 30px 22px 32px; box-shadow: 6px 8px 0 var(--yellow); }
.blog-cta__title { font-size: 20px; font-weight: 900; letter-spacing: 0.04em; }
.blog-cta__sub { font-size: 14px; opacity: 0.8; margin: 6px 0 18px; }
.blog-cta__btn { display: inline-block; background: var(--yellow); color: var(--black); font-weight: 900; text-decoration: none; padding: 14px 32px; border-radius: 999px; font-size: 16px; }
.blog-cta__btn:hover { transform: translateY(-2px); }

.blog-related { max-width: 1100px; margin: 60px auto 0; }
.blog-related h2 { font-size: 22px; font-weight: 900; margin-bottom: 18px; padding-left: 16px; border-left: 8px solid var(--yellow); }
.blog-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); gap: 22px; }
.blog-card { display: flex; flex-direction: column; gap: 10px; background: #fff; border: 2.5px solid var(--black); border-radius: 12px; padding: 8px 22px 20px; text-decoration: none; box-shadow: 6px 6px 0 rgba(0, 0, 0, 0.12); transition: transform 0.2s ease, box-shadow 0.2s ease; position: relative; overflow: hidden; }
.blog-card::before { content: ""; position: absolute; top: 0; left: 0; right: 0; height: 8px; background: var(--yellow); z-index: 1; }
.blog-card--cyan::before { background: #7FE0EE; }
.blog-card--lime::before { background: #BEF06A; }
.blog-card--pink::before { background: #F7A8C8; }
.blog-card:hover { transform: translateY(-4px); box-shadow: 8px 10px 0 rgba(0, 0, 0, 0.16); }
.blog-card__pillar { font-size: 11.5px; font-weight: 900; letter-spacing: 0.14em; color: rgba(0, 0, 0, 0.6); margin-top: 6px; }
.blog-card__title { font-size: 18px; font-weight: 900; line-height: 1.5; text-wrap: balance; }
.blog-card__desc { font-size: 14px; line-height: 1.75; color: #444; display: -webkit-box; -webkit-line-clamp: 3; -webkit-box-orient: vertical; overflow: hidden; }
.blog-card__meta { margin-top: auto; font-size: 12.5px; font-weight: 700; color: rgba(0, 0, 0, 0.55); }
.blog-card--draft { border-style: dashed; }

.blog-filter { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 26px; }
.blog-filter button { font-family: inherit; font-weight: 900; font-size: 13px; letter-spacing: 0.06em; padding: 8px 16px; border-radius: 999px; border: 2px solid var(--black); background: #fff; cursor: pointer; }
.blog-filter button.is-on { background: var(--black); color: var(--yellow); }
.blog-index__note { margin-top: 32px; font-size: 13.5px; color: #555; text-align: center; }
.blog-index__note a { font-weight: 700; }
.blog-back { margin-top: 40px; text-align: center; font-weight: 900; }
.blog-back a { text-decoration: none; border-bottom: 2px solid var(--yellow); }
.site-nav a.is-active { background: var(--black); color: var(--yellow); }

@media (max-width: 768px) {
  .sp-only { display: inline; }
  .blog-hero { padding-top: 292px; }
  .blog-hero .ph-label { font-size: 11px; letter-spacing: 0.12em; }
  .blog-title { font-size: clamp(22px, 6.2vw, 28px); }
  .blog-meta { font-size: 12.5px; gap: 6px 14px; }
  .blog-main { padding: 34px 5vw 70px; }
  .blog-article { padding: 22px 18px 26px; border-radius: 10px; box-shadow: 6px 6px 0 rgba(0, 0, 0, 0.12); }
  .blog-eyecatch { margin: -4px 0 20px; }
  .blog-card__thumb { margin: 4px -22px 2px; }
  .blog-lead { font-size: 15.5px; padding: 14px 16px; }
  .blog-body { font-size: 16px; line-height: 1.9; }
  .blog-body h2 { font-size: 20px; margin-top: 1.9em; }
  .blog-body h3 { font-size: 17px; }
  .blog-body table { font-size: 13.5px; }
  .blog-body th, .blog-body td { padding: 8px 10px; }
  .blog-author { flex-direction: column; gap: 12px; }
  .blog-cta__title { font-size: 18px; }
  .blog-grid { grid-template-columns: 1fr; gap: 16px; }
}