/*
  コラムページ専用スタイル（追加ファイル・既存 assets/index-*.css は変更しない）
  トップページの配色・フォントに合わせた最小限の独自CSS。
  ビルド工程なしの静的サイトのため、Tailwindの生成CSSには依存しない。
*/

:root{
  --column-bg: oklch(98.5% .005 100);
  --column-fg: oklch(22% .02 60);
  --column-fg-soft: oklch(0.35 0.03 60);
  --column-primary: oklch(0.45 0.12 155);
  --column-primary-dark: oklch(0.40 0.12 155);
  --column-primary-deep: oklch(0.18 0.06 155);
  --column-accent: oklch(0.75 0.18 140);
  --column-card-border: oklch(0.92 0.02 145);
  --column-card-bg-soft: oklch(0.975 0.008 145);
}

*{ box-sizing: border-box; }

html{ scroll-behavior: smooth; }

body.column-page{
  margin: 0;
  background: var(--column-bg);
  color: var(--column-fg);
  font-family: "Noto Sans JP", sans-serif;
  line-height: 1.8;
}

.column-page h1,
.column-page h2,
.column-page h3{
  font-family: "Noto Serif JP", serif;
  color: var(--column-fg);
}

.column-container{
  width: 100%;
  max-width: 1024px;
  margin: 0 auto;
  padding: 0 1.25rem;
}

/* ---------- header ---------- */
.column-header{
  background: var(--column-primary-deep);
  position: sticky;
  top: 0;
  z-index: 50;
}
.column-header .column-container{
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 4.25rem;
}
.column-header .column-logo{
  display: flex;
  align-items: center;
  gap: 0.6rem;
  text-decoration: none;
}
.column-header .column-logo img{
  width: 2.25rem;
  height: 2.25rem;
}
.column-header .column-logo-text{
  display: flex;
  flex-direction: column;
  line-height: 1.2;
}
.column-header .column-logo-text span:first-child{
  font-family: "Noto Serif JP", serif;
  font-weight: 700;
  font-size: 0.85rem;
  color: #fff;
}
.column-header .column-logo-text span:last-child{
  font-size: 0.55rem;
  letter-spacing: 0.15em;
  color: rgba(255,255,255,0.55);
}
.column-header nav{
  display: flex;
  align-items: center;
  gap: 1.5rem;
}
.column-header nav a{
  color: rgba(255,255,255,0.85);
  text-decoration: none;
  font-size: 0.85rem;
  font-weight: 500;
  transition: color .2s ease;
}
.column-header nav a:hover{ color: var(--column-accent); }
.column-header nav a.is-current{ color: var(--column-accent); }
.column-header .column-tel{
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  background: var(--column-primary);
  color: #fff !important;
  padding: 0.5rem 1rem;
  border-radius: 0.75rem;
  font-weight: 600;
  font-size: 0.8rem;
}
.column-header .column-tel:hover{ background: var(--column-primary-dark); }
.column-header .column-nav-links{ display: flex; gap: 1.5rem; }
@media (max-width: 720px){
  .column-header .column-nav-links{ display: none; }
  .column-header .column-logo-text span:first-child{ font-size: 0.7rem; white-space: nowrap; }
  .column-header .column-logo-text span:last-child{ display: none; }
  .column-header .column-tel{ padding: 0.45rem 0.7rem; font-size: 0.72rem; white-space: nowrap; }
}

/* ---------- hero (column index) ---------- */
.column-hero{
  padding: 3.5rem 0 2.5rem;
  text-align: center;
  border-bottom: 1px solid var(--column-card-border);
}
.column-hero .eyebrow{
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  color: var(--column-primary);
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  margin-bottom: 0.75rem;
}
.column-hero .eyebrow .bar{ width: 2rem; height: 2px; background: var(--column-accent); }
.column-hero h1{
  font-size: clamp(1.6rem, 4vw, 2.4rem);
  font-weight: 700;
  margin: 0 0 0.75rem;
}
.column-hero p{
  color: var(--column-fg-soft);
  font-size: 0.95rem;
  max-width: 36rem;
  margin: 0 auto;
}

/* ---------- article list ---------- */
.column-list{
  padding: 2.5rem 0 5rem;
  display: grid;
  gap: 1.5rem;
  grid-template-columns: 1fr;
}
@media (min-width: 720px){
  .column-list{ grid-template-columns: repeat(2, 1fr); }
}
.column-card{
  display: block;
  background: #fff;
  border: 1px solid var(--column-card-border);
  border-radius: 1rem;
  padding: 1.5rem;
  text-decoration: none;
  color: inherit;
  box-shadow: 0 1px 2px rgba(0,0,0,0.03);
  transition: box-shadow .2s ease, transform .2s ease;
}
.column-card:hover{
  box-shadow: 0 8px 24px rgba(0,0,0,0.06);
  transform: translateY(-2px);
}
.column-card .date{
  font-size: 0.75rem;
  color: var(--column-primary);
  font-weight: 600;
  letter-spacing: 0.05em;
}
.column-card h2{
  font-size: 1.1rem;
  margin: 0.5rem 0 0.6rem;
  line-height: 1.5;
}
.column-card p{
  font-size: 0.85rem;
  color: var(--column-fg-soft);
  line-height: 1.7;
  margin: 0 0 0.9rem;
}
.column-card .tags{ display: flex; flex-wrap: wrap; gap: 0.4rem; }
.column-card .tag{
  font-size: 0.7rem;
  background: var(--column-card-bg-soft);
  color: var(--column-primary);
  padding: 0.15rem 0.6rem;
  border-radius: 999px;
}
.column-empty{
  padding: 4rem 0;
  text-align: center;
  color: var(--column-fg-soft);
}

/* ---------- article page ---------- */
.column-article{ padding: 3rem 0 5rem; }
.column-article .back-link{
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  color: var(--column-primary);
  text-decoration: none;
  font-size: 0.85rem;
  font-weight: 600;
  margin-bottom: 1.5rem;
}
.column-article .back-link:hover{ text-decoration: underline; }
.column-article .article-meta{
  font-size: 0.8rem;
  color: var(--column-fg-soft);
  margin-bottom: 0.5rem;
}
.column-article h1{
  font-size: clamp(1.5rem, 4vw, 2.1rem);
  line-height: 1.5;
  margin: 0.4rem 0 1rem;
}
.column-article .tags{ display: flex; flex-wrap: wrap; gap: 0.4rem; margin-bottom: 2rem; }
.column-article .tag{
  font-size: 0.7rem;
  background: var(--column-card-bg-soft);
  color: var(--column-primary);
  padding: 0.15rem 0.6rem;
  border-radius: 999px;
}
.column-article .notice{
  background: var(--column-card-bg-soft);
  border-left: 3px solid var(--column-accent);
  padding: 0.9rem 1.1rem;
  font-size: 0.85rem;
  color: var(--column-fg-soft);
  border-radius: 0 0.5rem 0.5rem 0;
  margin-bottom: 2rem;
}
.column-article .body{ font-size: 0.95rem; }
.column-article .body h2{
  font-size: 1.3rem;
  margin: 2.2rem 0 1rem;
  padding-top: 0.4rem;
  border-top: 1px solid var(--column-card-border);
}
.column-article .body h2:first-child{ border-top: none; padding-top: 0; margin-top: 0; }
.column-article .body h3{ font-size: 1.05rem; margin: 1.6rem 0 0.75rem; }
.column-article .body p{ margin: 0 0 1.2rem; }
.column-article .body ul{ margin: 0 0 1.2rem; padding-left: 1.3rem; }
.column-article .body li{ margin-bottom: 0.5rem; }
.column-article .body strong{ color: var(--column-fg); }
.column-article .body a{ color: var(--column-primary); }

.column-cta{
  margin-top: 3rem;
  background: var(--column-primary-deep);
  border-radius: 1rem;
  padding: 2rem;
  text-align: center;
  color: #fff;
}
.column-cta p{ color: rgba(255,255,255,0.75); font-size: 0.85rem; margin: 0 0 1rem; }
.column-cta .buttons{ display: flex; justify-content: center; gap: 0.75rem; flex-wrap: wrap; }
.column-cta a{
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.65rem 1.3rem;
  border-radius: 0.75rem;
  font-size: 0.85rem;
  font-weight: 600;
  text-decoration: none;
}
.column-cta .tel{ background: var(--column-primary); color: #fff; }
.column-cta .contact{ background: rgba(255,255,255,0.1); color: #fff; border: 1px solid rgba(255,255,255,0.3); }

/* ---------- footer (simplified, matches homepage tone) ---------- */
.column-footer{
  background: var(--column-primary-deep);
  color: rgba(255,255,255,0.5);
}
.column-footer .column-container{ padding: 2rem 1.25rem; text-align: center; }
.column-footer a{ color: rgba(255,255,255,0.6); text-decoration: none; font-size: 0.8rem; }
.column-footer a:hover{ color: var(--column-accent); }
.column-footer .footer-nav{ display: flex; justify-content: center; gap: 1.25rem; flex-wrap: wrap; margin-bottom: 1rem; }
.column-footer .copyright{ font-size: 0.7rem; color: rgba(255,255,255,0.3); margin-top: 1rem; }