/* ==== Sea Beauty Post Headings (確実に当てる版) ==== */
:root{
  --sb-teal:#2f6f78;
  --sb-line:#e7ecef;
  --sb-text:#1c2b2d;
}

/* 投稿ページの本文領域に確実に当てる（entry-content不要） */
body.single-post main h2,
body.single main h2{
  margin: 2.2em 0 1em !important;
  padding: .55em 0 .55em 1.05em !important;
  border-left: 6px solid var(--sb-teal) !important;
  border-bottom: 1px solid var(--sb-line) !important;
  background: linear-gradient(90deg, rgba(47,111,120,.10), rgba(47,111,120,0)) !important;
  border-radius: 10px !important;
  color: var(--sb-text) !important;
  font-size: 1.35em !important;
  font-weight: 700 !important;
  line-height: 1.35 !important;
}

body.single-post main h3,
body.single main h3{
  margin: 1.8em 0 .8em !important;
  padding-bottom: .35em !important;
  border-bottom: 1px solid var(--sb-line) !important;
  font-size: 1.18em !important;
  font-weight: 700 !important;
  color: #243c3f !important;
}

body.single-post main h4,
body.single main h4{
  margin: 1.5em 0 .6em !important;
  font-size: 1.05em !important;
  font-weight: 700 !important;
  color: var(--sb-teal) !important;
}