/*
  article.css
  読み物ページ共通CSS。
  /about/ のような固定ページのコラム表示と、将来の投稿記事・活動レポートで共用する想定。
*/

.article-main {
  background:
    linear-gradient(180deg, #ffffff 0%, #ffffff 72%, #fafafa 100%);
}

.article-page {
  max-width: 920px;
  margin: 0 auto;
  padding: 72px 24px 0;
}

.article-header {
  max-width: 820px;
  margin: 0 auto 42px;
  text-align: left;
}

.article-eyebrow {
  margin: 0 0 18px;
  color: var(--red);
  font-size: 13px;
  font-weight: 900;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.article-header h1 {
  margin: 0;
  color: var(--black);
  font-size: clamp(34px, 5vw, 56px);
  line-height: 1.25;
  letter-spacing: 0.04em;
}

.article-subtitle {
  margin: 18px 0 0;
  color: var(--black);
  font-size: clamp(20px, 2.4vw, 28px);
  line-height: 1.6;
  font-weight: 700;
}

.article-lead {
  margin: 26px 0 0;
  color: #333;
  font-size: 17px;
  line-height: 2.05;
}

.article-body {
  max-width: 760px;
  margin: 0 auto;
}

.article-body section {
  margin: 64px 0;
}

.article-body h2 {
  position: relative;
  margin: 0 0 24px;
  padding-top: 18px;
  color: var(--black);
  font-size: clamp(24px, 3vw, 34px);
  line-height: 1.55;
  letter-spacing: 0.04em;
}

.article-body h2::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  width: 54px;
  height: 3px;
  background: var(--red);
}

.article-body p {
  margin: 0;
  color: #333;
  font-size: 16px;
  line-height: 2.05;
}

.article-body p + p {
  margin-top: 18px;
}

.article-figure {
  margin: 46px auto;
}

.article-figure img {
  display: block;
  width: 100%;
}

.article-figure-logo {
  max-width: 520px;
  padding: 42px 52px;
  background:
    linear-gradient(135deg, rgba(227, 6, 19, 0.035), rgba(0, 0, 0, 0.025)),
    #ffffff;
  border: 1px solid var(--line);
  box-shadow: var(--shadow);
}

.article-figure-wide {
  max-width: 760px;
  padding: 28px;
  background: #ffffff;
  border: 1px solid var(--line);
  box-shadow: var(--shadow);
}

.article-figure-wide img {
  border-radius: 6px;
}

.article-figure figcaption {
  margin-top: 14px;
  color: var(--muted);
  font-size: 13px;
  text-align: center;
}

.article-callout {
  position: relative;
  margin: 56px auto;
  padding: 34px 38px;
  background:
    linear-gradient(135deg, rgba(227, 6, 19, 0.06), rgba(0, 0, 0, 0.025)),
    #fff;
  border-left: 5px solid var(--red);
  box-shadow: var(--shadow);
}

.article-callout p {
  margin: 0;
  color: var(--black);
  font-size: clamp(18px, 2.5vw, 24px);
  font-weight: 700;
  line-height: 1.85;
}

.article-related-section {
  padding-bottom: 8px;
}

.article-related-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 18px;
  margin-top: 26px;
}

.article-related-card {
  display: block;
  padding: 26px;
  background: #fff;
  border: 1px solid var(--line);
  box-shadow: var(--shadow);
  transition: transform 0.2s ease, border-color 0.2s ease;
}

.article-related-card:hover {
  transform: translateY(-3px);
  border-color: rgba(227, 6, 19, 0.35);
}

.article-related-card span {
  display: block;
  margin-bottom: 10px;
  color: var(--red);
  font-size: 12px;
  font-weight: 900;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.article-related-card strong {
  display: block;
  color: var(--black);
  font-size: 19px;
  line-height: 1.55;
}

.article-related-card p {
  margin: 12px 0 0;
  color: var(--muted);
  font-size: 14px;
  line-height: 1.85;
}

.article-cta {
  margin-top: 72px;
  padding: 72px 24px;
  background: var(--bg-soft);
}

.article-cta-inner {
  max-width: 760px;
  margin: 0 auto;
  padding: 44px;
  text-align: center;
  background: #fff;
  border: 1px solid var(--line);
  box-shadow: var(--shadow);
}

.article-cta-inner h2 {
  margin: 0;
  font-size: clamp(26px, 3vw, 36px);
  line-height: 1.55;
  letter-spacing: 0.04em;
}

.article-cta-inner p:not(.section-label) {
  margin: 18px auto 30px;
  color: var(--muted);
  line-height: 1.9;
}

@media (max-width: 760px) {
  .article-page {
    padding: 48px 20px 0;
  }

  .article-header {
    margin-bottom: 34px;
  }

  .article-lead,
  .article-body p {
    font-size: 15px;
    line-height: 1.95;
  }

  .article-body section {
    margin: 48px 0;
  }

  .article-figure-logo,
  .article-figure-wide,
  .article-callout,
  .article-cta-inner {
    padding: 24px;
  }

  .article-related-grid {
    grid-template-columns: 1fr;
  }
}