/* ---- 記事共通スタイル ---- */
.article-wrapper {
  display: grid;
  grid-template-columns: 1fr 320px;
  gap: 80px;
  align-items: start;
  padding-top: 40px;
}
.article-main {
  /* 記事本文の読み幅を制限 → 1行の文字数が減り文字が大きく見える */
  max-width: 720px;
}
.article-header { margin-bottom: 48px; }
.article-tags { display: flex; gap: 8px; margin-bottom: 16px; }
.article-title {
  font-family: var(--font-ja-heading);
  font-size: clamp(26px,3vw,40px);
  font-weight: 400;
  color: var(--charcoal);
  line-height: 1.4;
  margin-bottom: 20px;
}
.article-meta {
  display: flex;
  align-items: center;
  gap: 16px;
  font-family: var(--font-ui);
  font-size: 15px;
  color: var(--mid-gray);
  padding-bottom: 24px;
  border-bottom: 1px solid var(--border);
}
.article-hero-img {
  width: 100%;
  border-radius: 4px;
  margin-bottom: 48px;
  max-height: 500px;
  object-fit: cover;
}
.article-body h2 {
  font-family: var(--font-ja-heading);
  font-size: 26px;
  font-weight: 500;
  color: var(--charcoal);
  margin: 48px 0 16px;
  padding-left: 16px;
  border-left: 3px solid var(--teal);
}
.article-body h3 {
  font-family: var(--font-ja-heading);
  font-size: 20px;
  font-weight: 500;
  color: var(--charcoal);
  margin: 32px 0 12px;
}
.article-body p {
  font-size: 17px;
  line-height: 1.85;
  color: var(--charcoal);
  margin-bottom: 20px;
}
.article-body blockquote {
  margin: 32px 0;
  padding: 24px 28px;
  background: rgba(134,202,182,0.08);
  border-left: 3px solid var(--teal);
  border-radius: 0 4px 4px 0;
  font-family: var(--font-ja-heading);
  font-size: 18px;
  color: var(--charcoal);
  line-height: 1.8;
}
.article-body .highlight-box {
  margin: 32px 0;
  padding: 28px 32px;
  background: var(--light-gray);
  border: 1px solid var(--border);
  border-radius: 4px;
}
.article-body .highlight-box p { margin-bottom: 8px; }
.article-body .highlight-box p:last-child { margin-bottom: 0; }
.article-body strong { color: var(--teal); font-weight: 600; }
.article-body .point-num {
  display: inline-block;
  background: var(--teal);
  color: var(--white);
  font-family: var(--font-ui);
  font-size: 15px;
  font-weight: 700;
  letter-spacing: 0.08em;
  padding: 2px 10px;
  border-radius: 2px;
  margin-right: 8px;
  vertical-align: middle;
}
.article-img {
  width: 100%;
  border-radius: 4px;
  margin: 32px 0;
}

.article-figure {
  margin: 0 0 48px;
}
.article-figure .article-hero-img {
  margin-bottom: 8px;
}

.article-img-caption {
  font-size: 15px;
  color: var(--mid-gray);
  text-align: center;
  margin-top: 0px;
  margin-bottom: 32px;
}

/* サイドバー */
.article-sidebar {
  position: sticky;
  top: 100px;
}
.sidebar-toc {
  background: var(--light-gray);
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 28px;
  margin-bottom: 24px;
}
.sidebar-toc-title {
  font-family: var(--font-ui);
  font-size: 15px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--teal);
  margin-bottom: 16px;
}
.sidebar-toc a {
  display: block;
  font-size: 15px;
  color: var(--mid-gray);
  padding: 7px 0;
  border-bottom: 1px solid var(--border);
  transition: color 0.2s;
  line-height: 1.6;
}
.sidebar-toc a:last-child { border-bottom: none; }
.sidebar-toc a:hover { color: var(--teal); }

.sidebar-cta {
  background: var(--teal);
  border-radius: 4px;
  padding: 28px;
  text-align: center;
}
.sidebar-cta p {
  font-family: var(--font-ja-heading);
  font-size: 15px;
  color: var(--white);
  margin-bottom: 16px;
  line-height: 1.6;
}
.sidebar-cta a {
  display: block;
  background: var(--white);
  color: var(--teal);
  font-family: var(--font-ui);
  font-size: 15px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  padding: 12px;
  border-radius: 4px;
  transition: background 0.2s;
}
.sidebar-cta a:hover { background: rgba(255,255,255,0.9); }

/* 前後ナビ */
.article-nav {
  margin-top: 64px;
  padding-top: 40px;
  border-top: 1px solid var(--border);
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 24px;
}
.article-nav a {
  font-family: var(--font-ui);
  font-size: 15px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--teal);
  display: flex;
  align-items: center;
  gap: 6px;
  transition: color 0.2s, gap 0.2s;
}
.article-nav a:hover { color: var(--deep-teal); gap: 10px; }
.article-nav a svg {
  width: 14px; height: 14px;
  stroke: currentColor;
  fill: none;
  stroke-width: 2;
  stroke-linecap: round;
  stroke-linejoin: round;
}

@media (max-width: 1024px) {
  .article-wrapper { grid-template-columns: 1fr; }
  .article-sidebar { position: static; }
}