/* ===================================================================
   Graph Sensei コラム — 記事レイアウト / 一覧グリッド / TOC
   =================================================================== */

/* ===== コラム一覧ページ ===== */
.column-page {
  padding: 56px 0 96px;
  background: linear-gradient(180deg, #ffffff 0%, #f6f8fb 60%, #ffffff 100%);
  min-height: calc(100vh - var(--header-h) - 320px);
}
.column-page-head {
  text-align: center;
  margin-bottom: 56px;
}
.column-page-head .eyebrow {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.12em;
  color: var(--primary);
  text-transform: uppercase;
  margin-bottom: 14px;
}
.column-page-head h1 {
  font-size: clamp(32px, 5vw, 52px);
  letter-spacing: -0.025em;
  margin-bottom: 16px;
}
.column-page-head p {
  font-size: 17px;
  color: var(--text-muted);
  max-width: 640px;
  margin: 0 auto;
  line-height: 1.8;
}

.column-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 28px;
  margin-top: 16px;
}
.column-card {
  display: flex;
  flex-direction: column;
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  text-decoration: none;
  color: var(--text);
  overflow: hidden;
  transition: transform 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease;
}
.column-card:hover {
  border-color: var(--primary);
  transform: translateY(-3px);
  box-shadow: var(--shadow-md);
  text-decoration: none;
}
.column-card-image {
  position: relative;
  width: 100%;
  aspect-ratio: 16 / 9;
  background: linear-gradient(135deg, #e7efff 0%, #def7ee 100%);
  overflow: hidden;
}
.column-card-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}
.column-card-image-fallback {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  color: rgba(10, 92, 255, 0.25);
  font-family: var(--font-mono);
  font-size: 28px;
  font-weight: 700;
  letter-spacing: 0.08em;
  background: linear-gradient(135deg, #e7efff 0%, #def7ee 100%);
}
.column-card-body {
  padding: 24px;
  display: flex;
  flex-direction: column;
  flex: 1;
}
.column-card-meta {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 12px;
  font-size: 12px;
  color: var(--text-soft);
}
.column-card-tag {
  display: inline-block;
  padding: 3px 10px;
  background: var(--primary-soft);
  color: var(--primary);
  border-radius: 999px;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.04em;
}
.column-card h2 {
  font-size: 19px;
  line-height: 1.5;
  margin: 0 0 12px;
  letter-spacing: -0.005em;
}
.column-card-excerpt {
  flex: 1;
  font-size: 14px;
  color: var(--text-muted);
  line-height: 1.7;
  margin-bottom: 16px;
}
.column-card-cta {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 13px;
  font-weight: 600;
  color: var(--primary);
}
.column-card:hover .column-card-cta svg { transform: translateX(3px); }
.column-card-cta svg { transition: transform 0.2s ease; }

/* ===== 記事ページ ===== */
.column-article {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 240px;
  gap: 64px;
  max-width: 1120px;
  margin: 0 auto;
  padding: 56px 24px 56px;
}
@media (max-width: 960px) {
  .column-article { grid-template-columns: 1fr; gap: 32px; }
}

.column-content { min-width: 0; }
.column-hero {
  margin-bottom: 36px;
}
.column-hero-meta {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-bottom: 18px;
  font-size: 13px;
  color: var(--text-soft);
}
.column-hero-meta time { font-family: var(--font-mono); }
.column-tag {
  display: inline-block;
  padding: 4px 12px;
  background: var(--primary-soft);
  color: var(--primary);
  border-radius: 999px;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.04em;
}
.column-hero h1 {
  font-size: clamp(28px, 4.5vw, 44px);
  line-height: 1.35;
  letter-spacing: -0.02em;
  margin-bottom: 18px;
}
.column-lead {
  font-size: 17px;
  color: var(--text-muted);
  line-height: 1.85;
  border-left: 3px solid var(--primary);
  padding: 6px 0 6px 18px;
  margin-bottom: 32px;
}
.column-eyecatch {
  width: 100%;
  aspect-ratio: 16 / 9;
  border-radius: var(--radius-lg);
  background: linear-gradient(135deg, #e7efff 0%, #def7ee 100%);
  overflow: hidden;
  margin: 0 0 40px;
  position: relative;
}
.column-eyecatch img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}
.column-eyecatch-fallback {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  color: rgba(10, 92, 255, 0.3);
  font-family: var(--font-mono);
  font-size: clamp(24px, 4vw, 40px);
  font-weight: 700;
  letter-spacing: 0.08em;
}

/* ===== 本文タイポグラフィ ===== */
.column-body {
  font-size: 16.5px;
  line-height: 2.05;
  color: var(--text);
  max-width: 720px;
}
.column-body p {
  margin: 0 0 1.4em;
}
.column-body p strong {
  font-weight: 700;
  color: var(--text);
  background: linear-gradient(180deg, transparent 62%, rgba(16, 185, 129, 0.18) 62%);
  padding: 0 2px;
}
.column-body h2 {
  font-size: 26px;
  line-height: 1.5;
  letter-spacing: -0.01em;
  margin: 56px 0 20px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--border);
}
.column-body h3 {
  font-size: 19px;
  line-height: 1.55;
  margin: 36px 0 14px;
  color: var(--text);
}
.column-body blockquote {
  margin: 24px 0;
  padding: 16px 20px;
  background: var(--bg-soft);
  border-left: 3px solid var(--text-soft);
  border-radius: 0 var(--radius) var(--radius) 0;
  color: var(--text-muted);
  font-style: normal;
  font-size: 15.5px;
  line-height: 1.85;
}
.column-body ul,
.column-body ol {
  margin: 0 0 1.4em;
  padding-left: 1.8em;
  line-height: 1.95;
}
.column-body li { margin-bottom: 0.4em; }
.column-body code {
  font-family: var(--font-mono);
  font-size: 0.92em;
  background: var(--bg-muted);
  padding: 2px 6px;
  border-radius: 4px;
}
.column-body a {
  color: var(--primary);
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
}
.column-body a:hover { color: var(--primary-dark); }

/* ===== 本文中のグラフ事例 ===== */
.column-graph {
  margin: 32px 0 40px;
  padding: 28px 24px 20px;
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
}
.column-graph-canvas-wrap {
  position: relative;
  width: 100%;
  aspect-ratio: 16 / 10;
  margin-bottom: 12px;
}
.column-graph-canvas-wrap canvas {
  max-width: 100%;
  max-height: 100%;
}
.column-graph figcaption {
  font-size: 13px;
  color: var(--text-muted);
  text-align: center;
  line-height: 1.6;
}
.column-graph figcaption strong {
  color: var(--text);
  font-weight: 700;
  margin-right: 6px;
}

/* ===== Pull-quote ===== */
.column-pullquote {
  margin: 40px 0;
  padding: 0 0 0 24px;
  border-left: 4px solid var(--primary);
  font-size: 21px;
  font-weight: 600;
  line-height: 1.65;
  color: var(--text);
  letter-spacing: -0.01em;
}

/* ===== 著者・編集部バイライン ===== */
.column-byline {
  margin-top: 48px;
  padding: 24px 0 0;
  border-top: 1px solid var(--border);
}
.column-byline-inner {
  display: flex;
  flex-direction: column;
  gap: 4px;
}
.column-byline-name {
  font-family: "Nova Round", var(--font-sans);
  font-size: 16px;
  font-weight: 400;
  color: var(--text);
  letter-spacing: 0.01em;
}
.column-byline-desc {
  font-size: 13px;
  line-height: 1.85;
  color: var(--text-muted);
  /* 句読点が詰まらないように、palt を解除して自然な字間にする */
  font-feature-settings: normal;
}
.column-byline-desc a {
  color: var(--primary);
  text-decoration: underline;
  text-underline-offset: 3px;
}
.column-byline-desc a:hover { color: var(--primary-dark); }

/* ===== 記事末尾の関連 ===== */
.column-related {
  margin-top: 40px;
  padding-top: 36px;
  border-top: 1px solid var(--border);
}
.column-related h2 {
  font-size: 22px;
  margin-bottom: 20px;
}
.column-related-list {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 16px;
  list-style: none;
  margin: 0;
  padding: 0;
}
.column-related-item a {
  display: block;
  padding: 16px 18px;
  background: var(--bg-soft);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  color: var(--text);
  text-decoration: none;
  transition: all 0.2s;
}
.column-related-item a:hover {
  background: #fff;
  border-color: var(--primary);
  transform: translateY(-2px);
  text-decoration: none;
}
.column-related-item-tag {
  font-size: 11px;
  color: var(--primary);
  font-weight: 700;
  letter-spacing: 0.04em;
  margin-bottom: 6px;
  display: block;
}
.column-related-item-title {
  font-size: 14px;
  font-weight: 600;
  line-height: 1.45;
}

/* ===== 右カラム TOC ===== */
.column-toc {
  position: sticky;
  top: calc(var(--header-h) + 24px);
  align-self: start;
  font-size: 13px;
  color: var(--text-muted);
  max-height: calc(100vh - var(--header-h) - 48px);
  overflow-y: auto;
}
.column-toc-title {
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.1em;
  color: var(--text-soft);
  text-transform: uppercase;
  margin-bottom: 14px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--border);
}
.column-toc ul {
  list-style: none;
  padding: 0;
  margin: 0;
}
.column-toc li {
  margin: 0;
  line-height: 1.6;
}
.column-toc a {
  display: block;
  padding: 6px 10px 6px 14px;
  color: var(--text-muted);
  text-decoration: none;
  border-left: 2px solid transparent;
  transition: all 0.15s;
  font-size: 13px;
  line-height: 1.55;
}
.column-toc a:hover {
  color: var(--text);
  border-left-color: var(--border);
  background: var(--bg-soft);
  text-decoration: none;
}
.column-toc a.is-active {
  color: var(--primary);
  border-left-color: var(--primary);
  font-weight: 600;
}
@media (max-width: 960px) {
  .column-toc { display: none; }
}

/* ===== トップページのコラムピックアップ ===== */
.home-columns-section {
  padding: 80px 0;
  background: var(--bg-soft);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}
.home-columns-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 20px;
  margin-top: 40px;
}
.home-columns-cta-wrap {
  text-align: center;
  margin-top: 36px;
}