:root {
  --blue:         #005AAB;
  --blue-dark:    #368AD5;
  --blue-deeper:  #003F78;
  --blue-vivid:   #0A70E3;
  --blue-light:   #EBF4FC;
  --white:        #ffffff;
  --off-white:    #F9F9F8;
  --gray-100:     #D0D0D9;
  --gray-200:     #9EAAB1;
  --gray-400:     #656568;
  --gray-600:     #5F6368;
  --text:         #191A1C;
  --sans:         "Gen Interface JP", Helvetica, "Hiragino Sans", "Noto Sans JP", sans-serif;
  --sans-bold:    "Gen Interface JP-Bold", Helvetica, "Hiragino Sans", "Noto Sans JP", sans-serif;
  --transition:   0.18s ease;
}

@font-face { font-family: "Gen Interface JP"; src: url("/fonts/gen-interface-jp/GenInterfaceJP-Regular.woff2") format("woff2"), local("Gen Interface JP"); font-weight: 400; font-display: swap; }
@font-face { font-family: "Gen Interface JP-Bold"; src: url("/fonts/gen-interface-jp/GenInterfaceJP-Bold.woff2") format("woff2"), local("Gen Interface JP-Bold"); font-weight: 700; font-display: swap; }

*, *::before, *::after { box-sizing: border-box; }
body { font-family: var(--sans); font-size: 18px; line-height: 1.8; color: var(--text); background: var(--white); -webkit-font-smoothing: antialiased; -moz-osx-font-smoothing: grayscale; }
html, body { margin: 0; padding: 0; }
a { text-decoration: none; color: inherit; }

.breadcrumb { background: transparent; border-bottom: none; padding: 0; }
.breadcrumb__inner {
  max-width: 1200px; margin: 0 auto; padding: 12px 48px;
  display: flex; align-items: center; gap: 8px;
  font-size: 12px; color: var(--gray-600);
}
.breadcrumb a { color: var(--blue); text-decoration: underline; transition: color var(--transition); }
.breadcrumb a:hover { color: var(--blue-dark); }
.breadcrumb__sep { color: var(--gray-400); font-size: 11px; }
.breadcrumb__cur { color: var(--text); font-weight: 500; }

.column-detail-header { padding: 40px 0 32px; border-bottom: 1px solid var(--gray-100); }
.column-detail-header__inner { max-width: 1200px; margin: 0 auto; padding: 0 48px; }
.column-detail-meta { display: flex; align-items: center; gap: 14px; margin-bottom: 16px; }
.column-detail-date { color: var(--text); font-size: 12px; font-weight: 500; letter-spacing: 0.02em; font-family: var(--sans); }
.column-author { display: flex; align-items: center; gap: 12px; margin-top: 16px; font-size: 14px; }
.column-author__img { width: 72px; height: 72px; border-radius: 50%; object-fit: cover; display: block; }
.column-detail-title { font-size: 48px; font-weight: 800; color: var(--text); letter-spacing: -0.02em; line-height: 1.5; font-family: var(--sans-bold); }

.page-layout { max-width: 1200px; margin: 0 auto; padding: 56px 48px; }
.page-main { min-width: 0; }

.column-intro-body,
.column-h2-body,
.column-h3-body {
  font-size: 18px; color: var(--text); line-height: 1.9;
  word-break: keep-all; overflow-wrap: break-word; font-family: var(--sans);
}
.column-intro-body { padding: 32px 0 0; }
.column-intro-body p, .column-h2-body p, .column-h3-body p { margin-bottom: 24px; }
.column-intro-body a, .column-h2-body a, .column-h3-body a { color: var(--blue); text-decoration: underline; }
.column-intro-body a:hover, .column-h2-body a:hover, .column-h3-body a:hover { color: var(--blue-dark); }
.column-intro-body ul, .column-h2-body ul, .column-h3-body ul { margin: 0 0 24px; padding-left: 1.5em; }
.column-intro-body ul li, .column-h2-body ul li, .column-h3-body ul li { margin-bottom: 8px; }

.column-hero-media img { width: 100%; aspect-ratio: 2 / 1; object-fit: cover; border-radius: 8px; display: block; }

.column-toc { background: var(--off-white); border: 1px solid var(--gray-100); border-radius: 12px; padding: 24px 28px; margin: 40px 0; }
.column-toc__label { font-size: 16px; font-weight: 700; color: var(--text); font-family: var(--sans-bold); margin: 0 0 12px; }
.column-toc__list { list-style: none; counter-reset: toc; margin: 0; padding: 0; display: flex; flex-direction: column; gap: 8px; }
.column-toc__list li { counter-increment: toc; }
.column-toc__list li::before { content: counter(toc) ". "; color: var(--blue); font-weight: 700; }
.column-toc__list a { color: var(--blue); text-decoration: underline; font-size: 16px; }
.column-toc__list a:hover { color: var(--blue-dark); }

.column-h2-section { margin-top: 64px; scroll-margin-top: 24px; }
.column-h2-section:first-of-type { margin-top: 48px; }
.column-h2-section__title {
  font-size: 32px; font-weight: 700; color: var(--text); letter-spacing: -0.01em;
  padding-bottom: 14px; border-bottom: 2px solid var(--text);
  margin: 0 0 24px; font-family: var(--sans-bold);
}
.column-h2-media { width: 66%; margin: 0 auto 24px; }
.column-h2-media img { width: 100%; aspect-ratio: 3 / 2; object-fit: cover; border-radius: 8px; display: block; }
.column-h2-buttons, .column-h3-buttons { margin: 24px 0; display: flex; flex-wrap: wrap; justify-content: center; gap: 12px; }

.column-h3-section { margin-top: 40px; padding-top: 32px; border-top: 1px solid var(--gray-100); }
.column-h3-section__title { font-size: 22px; font-weight: 700; color: var(--text); font-family: var(--sans-bold); margin: 0 0 16px; }
.column-h3-media { width: 66%; margin: 0 auto 20px; }
.column-h3-media img { width: 100%; aspect-ratio: 3 / 2; object-fit: cover; border-radius: 8px; display: block; }

.column-table-wrap { overflow-x: auto; margin: 0 0 24px; }
.column-table { width: 100%; min-width: 560px; border-collapse: collapse; font-size: 16px; line-height: 1.6; }
.column-table th, .column-table td { border: 1px solid var(--gray-100); padding: 12px 14px; text-align: left; vertical-align: top; }
.column-table thead th { background: var(--blue-light); color: var(--text); font-family: var(--sans-bold); }
.column-table tbody th { font-family: var(--sans-bold); white-space: nowrap; }

.page-main .faq-list { padding: 0; margin: 0 0 24px; }
.page-main .faq-list li { margin-bottom: 0; }

.column-credit { font-size: 14px; text-align: right; margin: 40px 0 0; }

.column-related-contents { background: var(--blue-light); border-radius: 12px; padding: 20px 24px; margin: 24px 0; }
.column-related-contents__label { font-size: 14px; font-weight: 700; color: var(--blue); margin: 0 0 10px; }
.column-related-contents__list { list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; gap: 8px; }
.column-related-contents__list a { color: var(--blue); text-decoration: underline; font-size: 16px; }
.column-related-contents__list a:hover { color: var(--blue-dark); }

.column-related-topics { margin-top: 64px; padding-top: 32px; border-top: 1px solid var(--gray-100); }
.column-related-topics__label { font-size: 18px; font-weight: 700; color: var(--text); font-family: var(--sans-bold); margin: 0 0 16px; }
.column-related-topics__list { list-style: none; margin: 0; padding: 0; display: flex; flex-wrap: wrap; gap: 10px; }
.column-related-topics__tag {
  display: inline-block; padding: 8px 18px; border-radius: 100px;
  background: var(--blue-light); color: var(--blue); font-size: 14px; font-weight: 600;
  transition: background var(--transition), color var(--transition);
}
.column-related-topics__tag:hover { background: var(--blue); color: #fff; }

.column-detail-footer { padding: 32px 0 56px; text-align: center; border-top: 1px solid var(--gray-100); margin-top: 16px; }
.btn-primary {
  display: inline-flex; align-items: center; gap: 8px;
  background: var(--blue); color: #fff;
  padding: 12px 24px; font-size: 18px; font-weight: 600;
  border-radius: 100px; font-family: var(--sans);
  letter-spacing: 0.03em; transition: background var(--transition);
}
.btn-primary:hover { background: var(--blue-dark); }
.btn-primary:active { background: var(--blue-deeper); }

@media (max-width: 768px) {
  .breadcrumb__inner { padding: 10px 20px; font-size: 10px; flex-wrap: wrap; }
  .page-layout { max-width: 100%; margin: 0; padding: 32px 20px; }
  .column-detail-header { padding: 28px 0 24px; }
  .column-detail-header__inner { padding: 0 20px; }
  .column-detail-title { font-size: 28px; }
  .column-detail-date { font-size: 10px; }
  .column-intro-body { padding: 24px 0 0; font-size: 14px; }
  .column-h2-body, .column-h3-body { font-size: 14px; }
  .column-table { font-size: 13px; }
  .btn-primary { font-size: 16px; }
  .column-h2-media, .column-h3-media { width: 100%; }
  .column-h2-section__title { font-size: 22px; }
  .column-h3-section__title { font-size: 18px; }
  .column-toc { padding: 18px 20px; }
}