.article-wrapper {
  display: grid;
  grid-template-columns: 1fr 320px;
  gap: 80px;
  align-items: start;
  padding-top: 40px;
}
/* 記事本文の読み幅を制限→文字が大きく見える */
.article-main { 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-img-caption {
  font-size: 15px; color: var(--mid-gray); text-align: center;
  margin-top: -20px; margin-bottom: 32px;
}
.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: 6px 0; border-bottom: 1px solid var(--border);
  transition: color 0.2s; line-height: 1.5;
}
.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); }
.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; }
}