/* ===== PAGE HERO (single) ===== */
.page-hero {
  position: relative;
  background: linear-gradient(135deg, var(--color-card-blue-light) 0%, var(--color-bg) 60%, var(--color-card-cream-1) 100%);
  overflow: hidden;
  padding: 64px 32px 60px;
  text-align: center;
}
.page-hero__blob {
  position: absolute;
  top: -100px; right: -80px;
  width: 400px; height: 400px;
  border-radius: 50%;
  background: radial-gradient(circle at 40% 40%, rgba(126,192,214,.4), transparent 70%);
  filter: blur(8px);
  pointer-events: none;
}
.breadcrumb {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font: 400 12px 'Jost';
  color: var(--color-text-muted);
  margin-bottom: 20px;
  flex-wrap: wrap;
}
.breadcrumb a { color: var(--color-text-muted); text-decoration: none; }
.breadcrumb a:hover { color: var(--color-blue-2); }
.breadcrumb__sep { font-size: 14px; }
.single-hero-meta {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 14px;
  margin-bottom: 18px;
}
.single-hero-date {
  font: 400 13px 'Jost';
  color: var(--color-text-muted);
  letter-spacing: .06em;
}
.page-hero__title {
  margin: 0 auto;
  font: 900 36px/1.4 'Zen Kaku Gothic New';
  color: var(--color-heading);
  letter-spacing: .02em;
  max-width: 800px;
}

/* ===== SINGLE LAYOUT ===== */
.single-layout {
  max-width: 1100px;
  margin: 0 auto;
  padding: 64px 32px 100px;
  display: grid;
  grid-template-columns: 1fr 300px;
  gap: 60px;
  align-items: start;
}

.single-main-col { min-width: 0; }

/* ===== EYE CATCH ===== */
.single-eyecatch {
  width: 100%;
  aspect-ratio: 16 / 7;
  border-radius: 14px;
  background: linear-gradient(135deg, var(--color-card-blue-light) 0%, var(--color-blue-3) 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 44px;
  overflow: hidden;
}
.single-eyecatch img {
  width: 100%; height: 100%;
  object-fit: cover;
  display: block;
}
.single-eyecatch-placeholder {
  font: 600 12px 'Jost';
  color: var(--color-text-muted);
  letter-spacing: .12em;
}

/* ===== ARTICLE ===== */
.single-article {
  font: 400 16px/2.0 'Noto Sans JP';
  color: var(--color-text);
}
.single-article h2 {
  font: 700 22px/1.5 'Zen Kaku Gothic New';
  color: var(--color-heading);
  margin: 48px 0 18px;
  padding-left: 16px;
  border-left: 4px solid var(--color-blue-2);
}
.single-article h3 {
  font: 700 18px/1.5 'Zen Kaku Gothic New';
  color: var(--color-heading);
  margin: 36px 0 14px;
}
.single-article p {
  margin: 0 0 22px;
}
.single-article ul,
.single-article ol {
  padding-left: 24px;
  margin: 0 0 22px;
}
.single-article li {
  margin-bottom: 8px;
}
.single-article strong {
  color: var(--color-heading);
  font-weight: 700;
}
.single-article a {
  color: var(--color-blue-2);
  text-decoration: underline;
}
.single-article a:hover { opacity: .75; }

/* インフォボックス */
.info-box {
  background: var(--color-card-blue-light);
  border: 1px solid var(--color-blue-3);
  border-radius: 12px;
  padding: 24px 28px;
  margin: 28px 0;
}
.info-box-title {
  font: 700 13px 'Jost';
  letter-spacing: .15em;
  color: var(--color-blue-2);
  margin-bottom: 12px;
}
.info-box table {
  width: 100%;
  border-collapse: collapse;
  font-size: 15px;
}
.info-box table tr { border-bottom: 1px solid rgba(91,175,201,.15); }
.info-box table tr:last-child { border-bottom: none; }
.info-box table th {
  width: 120px;
  padding: 10px 16px 10px 0;
  font: 700 14px 'Zen Kaku Gothic New';
  color: var(--color-blue-2);
  vertical-align: top;
  white-space: nowrap;
}
.info-box table td {
  padding: 10px 0;
  color: var(--color-text);
  line-height: 1.6;
}

/* ===== SHARE / TAG ===== */
.single-footer {
  margin-top: 56px;
  padding-top: 32px;
  border-top: 1px solid var(--color-border-cream);
  display: flex;
  flex-direction: column;
  gap: 20px;
}
.single-tags {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
}
.single-tags-label {
  font: 600 11px 'Jost';
  letter-spacing: .15em;
  color: var(--color-text-muted);
}
.single-tag {
  display: inline-block;
  padding: 4px 14px;
  border-radius: 999px;
  border: 1px solid var(--color-border-cream);
  font: 400 12px 'Zen Kaku Gothic New';
  color: var(--color-text-sub);
  text-decoration: none;
  transition: all .2s;
}
.single-tag:hover { border-color: var(--color-blue-2); color: var(--color-blue-2); }
.single-share {
  display: flex;
  align-items: center;
  gap: 12px;
}
.single-share-label {
  font: 600 11px 'Jost';
  letter-spacing: .15em;
  color: var(--color-text-muted);
}
.share-btn {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding: 8px 18px;
  border-radius: 999px;
  font: 700 12px 'Zen Kaku Gothic New';
  text-decoration: none;
  transition: opacity .2s;
}
.share-btn:hover { opacity: .8; }
.share-btn-x { background: #000; color: #fff; }
.share-btn-line { background: #06C755; color: #fff; }

/* ===== PREV / NEXT ===== */
.post-nav {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  margin-top: 20px;
}
.post-nav-link {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 20px 22px;
  border-radius: 12px;
  background: var(--color-card-cream-1);
  border: 1px solid var(--color-border-cream);
  text-decoration: none;
  color: inherit;
  transition: border-color .2s, background .2s;
}
.post-nav-link:hover { border-color: var(--color-blue-2); background: var(--color-card-blue-light); }
.post-nav-link.is-next { text-align: right; }
.post-nav-dir {
  font: 600 10px 'Jost';
  letter-spacing: .2em;
  color: var(--color-blue-2);
}
.post-nav-title {
  font: 700 13px/1.5 'Zen Kaku Gothic New';
  color: var(--color-heading);
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

/* ===== BACK BUTTON ===== */
.back-to-list {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin-top: 20px;
  padding: 12px 26px;
  border-radius: 999px;
  border: 1.5px solid var(--color-border-cream);
  font: 700 13px 'Zen Kaku Gothic New';
  color: var(--color-text-sub);
  text-decoration: none;
  transition: all .2s;
}
.back-to-list:hover { border-color: var(--color-blue-2); color: var(--color-blue-2); }

/* ===== SIDEBAR ===== */
.blog-sidebar {
  position: sticky;
  top: 100px;
  display: flex;
  flex-direction: column;
  gap: 32px;
}
.sidebar-widget {
  background: var(--color-card-cream-1);
  border-radius: 14px;
  padding: 26px 24px;
  border: 1px solid var(--color-border-cream);
}
.sidebar-widget-title {
  font: 700 12px 'Jost';
  letter-spacing: .2em;
  color: var(--color-blue-2);
  margin: 0 0 18px;
  padding-bottom: 12px;
  border-bottom: 1.5px solid var(--color-card-blue-light);
}
.sidebar-recent-list {
  list-style: none;
  margin: 0; padding: 0;
  display: flex;
  flex-direction: column;
  gap: 14px;
}
.sidebar-recent-list li a {
  display: flex;
  gap: 12px;
  text-decoration: none;
  color: inherit;
  align-items: flex-start;
}
.sidebar-recent-thumb {
  width: 60px; height: 44px;
  border-radius: 6px;
  background: var(--color-card-blue-light);
  flex-shrink: 0;
}
.sidebar-recent-date {
  font: 400 11px 'Jost';
  color: var(--color-text-muted);
  letter-spacing: .06em;
  display: block;
  margin-bottom: 4px;
}
.sidebar-recent-title {
  font: 500 13px/1.5 'Zen Kaku Gothic New';
  color: var(--color-heading);
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.sidebar-recent-list li a:hover .sidebar-recent-title { color: var(--color-blue-2); }
.sidebar-tag-cloud {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}
.sidebar-tag {
  display: inline-block;
  padding: 5px 14px;
  border-radius: 999px;
  border: 1px solid var(--color-border-cream);
  font: 400 12px 'Zen Kaku Gothic New';
  color: var(--color-text-sub);
  text-decoration: none;
  transition: all .2s;
}
.sidebar-tag:hover { border-color: var(--color-blue-2); color: var(--color-blue-2); }

/* ===== CTA BANNER ===== */
.sidebar-cta {
  background: var(--color-coral);
  border-radius: 14px;
  padding: 28px 22px;
  text-align: center;
}
.sidebar-cta-label {
  font: 600 10px 'Jost';
  letter-spacing: .2em;
  color: #FFEEE4;
  margin-bottom: 10px;
}
.sidebar-cta-title {
  font: 700 16px/1.5 'Zen Kaku Gothic New';
  color: #fff;
  margin-bottom: 14px;
}
.sidebar-cta-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: #fff;
  color: var(--color-coral-2);
  font: 700 13px 'Zen Kaku Gothic New';
  padding: 11px 22px;
  border-radius: 999px;
  text-decoration: none;
  transition: background .2s;
}
.sidebar-cta-btn:hover { background: var(--color-card-cream-1); }

/* ========================================
   TABLET  ( 768px ~ 1023px )
======================================== */
@media (min-width: 768px) and (max-width: 1023px) {
  .single-layout {
    grid-template-columns: 1fr 240px;
    gap: 40px;
    padding: 56px 24px 80px;
  }
  .page-hero__title { font-size: 28px; }
  .post-nav { gap: 12px; }
}

/* ========================================
   MOBILE  ( ~ 767px )
======================================== */
@media (max-width: 767px) {
  .single-layout {
    grid-template-columns: 1fr;
    padding: 36px 16px 64px;
    gap: 48px;
  }
  .page-hero { padding: 48px 16px 40px; }
  .page-hero__title {
    font-size: 22px;
    line-height: 1.45;
  }
  .single-eyecatch {
    aspect-ratio: 16 / 9;
    border-radius: 10px;
    margin-bottom: 32px;
  }
  .single-article { font-size: 15px; line-height: 1.9; }
  .single-article h2 { font-size: 18px; margin: 36px 0 14px; }
  .single-article h3 { font-size: 16px; margin: 28px 0 12px; }
  .info-box { padding: 20px 18px; }
  .info-box table th { width: 90px; font-size: 13px; padding: 9px 12px 9px 0; }
  .info-box table td { font-size: 13px; padding: 9px 0; }
  .post-nav { grid-template-columns: 1fr; gap: 10px; }
  .post-nav-link.is-next { text-align: left; }
  .single-share { flex-wrap: wrap; gap: 8px; }
  .blog-sidebar { position: static; }
}