/*
 * casestudy.css — 事例紹介ページ用スタイル
 * template.css を前提に、事例一覧と個別記事の読み物体験を定義する。
 */

.casestudy-index-page,
.casestudy-detail-page {
  background: var(--surface);
}

.case-hero {
  position: relative;
  margin-top: var(--header-h);
  padding: 78px 0 64px;
  background: #f8f9fa;
  color: var(--text-primary);
  border-bottom: 1px solid var(--border);
  overflow: hidden;
}

.case-hero .container {
  position: relative;
  z-index: 1;
}

.casestudy-index-page .case-hero {
  background: linear-gradient(180deg, #f8f9fa 0%, #ffffff 100%);
}

.case-hero__layout {
  display: block;
}

.case-hero__copy {
  max-width: 820px;
}

.case-hero__eyebrow,
.case-eyebrow {
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0;
  text-transform: uppercase;
  color: var(--primary);
  margin-bottom: 10px;
}

.case-hero__eyebrow {
  color: var(--text-muted);
}

.case-hero h1 {
  max-width: 780px;
  font-size: 40px;
  line-height: 1.35;
  font-weight: 700;
  letter-spacing: 0;
  margin-bottom: 18px;
}

.case-hero__lead {
  max-width: 760px;
  color: var(--text-secondary);
  font-size: 18px;
  line-height: 1.95;
  margin-bottom: 28px;
}

.case-hero__actions,
.case-actions {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  align-items: center;
}

.case-button,
.case-button--ghost {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 42px;
  padding: 9px 18px;
  border-radius: 4px;
  font-size: 14px;
  font-weight: 700;
  text-decoration: none;
  transition: background 0.2s ease, border-color 0.2s ease, color 0.2s ease;
}

.case-button {
  background: var(--primary);
  color: var(--surface);
  border: 1px solid var(--primary);
}

.case-button:hover {
  background: var(--primary-hover);
  border-color: var(--primary-hover);
  color: var(--surface);
}

.case-button--ghost {
  border: 1px solid var(--border-strong);
  color: var(--primary);
  background: var(--surface);
}

.case-button--ghost:hover {
  background: var(--surface-muted);
  border-color: var(--primary);
}

.case-section {
  padding: 74px 0;
}

.casestudy-detail-page .case-section {
  padding: 64px 0 72px;
}

.case-section--muted {
  background: var(--surface-muted);
}

.case-section__head {
  max-width: 760px;
  margin-bottom: 38px;
}

.case-section__head--center {
  margin-left: auto;
  margin-right: auto;
  text-align: center;
}

.case-section__head h2,
.case-article h2 {
  font-size: 30px;
  line-height: 1.45;
  font-weight: 700;
  margin-bottom: 14px;
}

.case-section__head p,
.case-article > p {
  color: var(--text-secondary);
  line-height: 1.9;
  font-size: 16px;
}

.case-feature-card {
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(320px, 0.95fr);
  gap: 34px;
  align-items: stretch;
  padding: 34px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--surface);
}

.case-feature-card__body {
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.case-label-row,
.case-card__meta,
.case-article-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  align-items: center;
  margin-bottom: 14px;
}

.case-pill {
  display: inline-flex;
  align-items: center;
  padding: 4px 10px;
  border-radius: 999px;
  background: var(--surface-muted);
  color: var(--text-secondary);
  border: 1px solid var(--border);
  font-size: 12px;
  font-weight: 700;
  line-height: 1.35;
}

.case-pill--new,
.case-pill--primary {
  color: var(--primary);
  background: #ffffff;
  border-color: rgba(26,40,136,0.18);
}

.case-feature-card h3 {
  font-size: 27px;
  line-height: 1.45;
  margin-bottom: 16px;
}

.case-feature-card h3 a,
.case-card h3 a,
.case-link-list a {
  color: var(--text-primary);
  text-decoration: none;
}

.case-feature-card h3 a:hover,
.case-card h3 a:hover,
.case-link-list a:hover {
  color: var(--primary);
}

.case-feature-card p {
  color: var(--text-secondary);
  line-height: 1.85;
  margin-bottom: 24px;
}

.case-feature-card__visual {
  min-height: 300px;
  border-radius: 8px;
  background: #f1f5f9;
  color: var(--text-primary);
  padding: 28px;
  display: grid;
  align-content: space-between;
  overflow: hidden;
  border: 1px solid var(--border);
}

.case-feature-card__visual-title {
  font-size: 14px;
  letter-spacing: 0;
  text-transform: uppercase;
  color: var(--text-muted);
  font-weight: 700;
}

.case-feature-card__diagram {
  display: grid;
  gap: 12px;
}

.case-diagram-node {
  padding: 14px 16px;
  border-radius: 6px;
  background: #ffffff;
  border: 1px solid var(--border);
}

.case-diagram-node strong {
  display: block;
  font-size: 15px;
  margin-bottom: 3px;
}

.case-diagram-node span {
  color: var(--text-secondary);
  font-size: 13px;
}

.case-card-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 24px;
}

.case-card-grid--2 {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.case-card {
  display: flex;
  flex-direction: column;
  min-height: 100%;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 8px;
  overflow: hidden;
}

.case-card__image {
  aspect-ratio: 16 / 9;
  background: var(--surface-muted);
  border-bottom: 1px solid var(--border);
}

.case-card__image img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.case-card__body {
  display: flex;
  flex: 1;
  flex-direction: column;
  padding: 24px;
}

.case-card h3 {
  font-size: 20px;
  line-height: 1.5;
  margin-bottom: 10px;
}

.case-card p {
  color: var(--text-secondary);
  font-size: 15px;
  line-height: 1.82;
  margin-bottom: 18px;
}

.case-card__body .case-actions,
.case-card__body .case-link-list {
  margin-top: auto;
}

.case-text-card {
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 24px;
  background: var(--surface);
}

.case-text-card h3 {
  font-size: 19px;
  line-height: 1.55;
  margin-bottom: 12px;
}

.case-text-card p,
.case-text-card li {
  color: var(--text-secondary);
  line-height: 1.85;
}

.case-link-list {
  list-style: none;
  display: grid;
  gap: 10px;
}

.case-link-list a {
  display: inline-flex;
  gap: 8px;
  color: var(--primary);
  font-weight: 700;
  text-decoration: none;
}

.case-link-list a::after {
  content: '→';
}

.case-mini-list {
  list-style: none;
  display: grid;
  gap: 12px;
  margin-top: 16px;
}

.case-mini-list li {
  position: relative;
  padding-left: 20px;
}

.case-mini-list li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0.7em;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--primary);
}

.case-cta-band {
  padding: 66px 0;
  color: var(--text-primary);
  background: #f8f9fa;
  border-top: 1px solid var(--border);
}

.case-cta-band .case-section__head p {
  color: var(--text-secondary);
}

.case-cta-band .case-eyebrow {
  color: var(--primary);
}

.case-cta-band .case-button {
  background: var(--primary);
  color: var(--surface);
}

.case-cta-band .case-button:hover {
  background: var(--primary-hover);
  color: var(--surface);
}

.case-cta-band .case-button--ghost {
  background: var(--surface);
  color: var(--primary);
  border-color: var(--border-strong);
}

.case-cta-band .case-button--ghost:hover {
  background: var(--surface-muted);
  border-color: var(--primary);
}

/* Detail page */
.case-breadcrumb {
  margin-bottom: 24px;
  font-size: 13px;
  color: var(--text-muted);
}

.case-breadcrumb a {
  color: var(--text-secondary);
  text-decoration: none;
}

.case-breadcrumb a:hover {
  color: var(--primary);
}

.case-article-layout {
  display: grid;
  grid-template-columns: minmax(0, 740px) 280px;
  gap: 56px;
  align-items: start;
}

.case-article-main {
  min-width: 0;
}

.case-article {
  padding: 42px 0;
  border-bottom: 1px solid var(--border);
}

.case-article:first-child {
  padding-top: 0;
}

.case-article:last-child {
  border-bottom: 0;
}

.case-source-card {
  margin: 0 0 34px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--surface);
  overflow: hidden;
}

.case-source-card a {
  display: block;
  color: inherit;
  text-decoration: none;
}

.case-source-card img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 16 / 9;
  object-fit: cover;
}

.case-source-card figcaption {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  padding: 15px 18px;
  border-top: 1px solid var(--border);
  color: var(--text-secondary);
  font-size: 14px;
  line-height: 1.6;
}

.case-source-card strong {
  color: var(--text-primary);
  font-size: 16px;
}

.case-article h2 {
  scroll-margin-top: calc(var(--header-h) + 24px);
}

.case-article h3 {
  font-size: 20px;
  line-height: 1.55;
  margin: 28px 0 10px;
}

.case-article p + p {
  margin-top: 15px;
}

.case-article ul,
.case-article ol {
  margin: 18px 0 0 1.3em;
  color: var(--text-secondary);
  line-height: 1.85;
}

.case-article li + li {
  margin-top: 8px;
}

.case-article-lead {
  font-size: 18px !important;
  color: var(--text-primary) !important;
  line-height: 1.95 !important;
}

.case-info-grid {
  display: grid;
  grid-template-columns: 170px 1fr;
  border-top: 1px solid var(--border);
  margin-top: 26px;
  font-size: 15px;
}

.case-info-grid dt,
.case-info-grid dd {
  padding: 14px 16px;
  border-bottom: 1px solid var(--border);
}

.case-info-grid dt {
  background: var(--surface-muted);
  color: var(--primary);
  font-weight: 700;
}

.case-info-grid dd {
  color: var(--text-primary);
}

.case-compare {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
  margin-top: 28px;
}

.case-compare__item {
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 22px;
  background: var(--surface);
}

.case-compare__item--safe {
  border-color: rgba(21,128,61,0.22);
  background: #f7fdf9;
}

.case-compare__item--risk {
  border-color: rgba(220,38,38,0.18);
  background: #fffafa;
}

.case-compare__item h3 {
  margin-top: 0;
}

.case-process {
  display: grid;
  gap: 0;
  margin-top: 28px;
  border-top: 1px solid var(--border);
}

.case-process__step {
  display: grid;
  grid-template-columns: 52px 1fr;
  gap: 18px;
  align-items: start;
  padding: 20px 0;
  border-bottom: 1px solid var(--border);
  background: transparent;
}

.case-process__num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 34px;
  height: 34px;
  border-radius: 50%;
  background: var(--surface-muted);
  color: var(--primary);
  border: 1px solid var(--border);
  font-weight: 700;
  font-size: 13px;
}

.case-process__step h3 {
  margin: 0 0 4px;
  font-size: 18px;
}

.case-process__step p {
  color: var(--text-secondary);
  margin: 0;
}

.case-table-wrap {
  overflow-x: auto;
  margin-top: 24px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--surface);
}

.case-table {
  width: 100%;
  border-collapse: collapse;
  min-width: 680px;
}

.case-table th,
.case-table td {
  padding: 15px 16px;
  border-bottom: 1px solid var(--border);
  text-align: left;
  vertical-align: top;
}

.case-table th {
  background: var(--surface-muted);
  color: var(--primary);
  font-size: 14px;
}

.case-table tr:last-child td {
  border-bottom: 0;
}

.case-highlight {
  margin: 26px 0;
  padding: 22px 24px;
  border-radius: 8px;
  background: #fbfcff;
  border: 1px solid var(--border);
}

.case-highlight h3 {
  margin-top: 0;
}

.case-sidebar {
  position: sticky;
  top: calc(var(--header-h) + 24px);
  display: grid;
  gap: 18px;
}

.case-sidebar__panel {
  padding: 20px;
  background: #fbfcff;
  border: 1px solid var(--border);
  border-radius: 8px;
}

.case-sidebar__panel h2 {
  font-size: 16px;
  line-height: 1.5;
  margin-bottom: 12px;
}

.case-sidebar__panel p {
  color: var(--text-secondary);
  font-size: 14px;
  line-height: 1.75;
}

.case-sidebar__panel ul {
  list-style: none;
  display: grid;
  gap: 8px;
}

.case-sidebar__panel li,
.case-sidebar__panel a {
  color: var(--text-secondary);
  font-size: 14px;
  line-height: 1.6;
}

.case-sidebar__panel a {
  color: var(--primary);
  text-decoration: none;
  font-weight: 700;
}

.case-note {
  font-size: 13px;
  color: var(--text-muted);
  line-height: 1.7;
  margin-top: 18px;
}

/* Editorial treatment for individual case studies. */
.casestudy-detail-page .case-hero {
  padding: 66px 0 58px;
  background: linear-gradient(135deg, #ffffff 0%, #f8faff 54%, #eef4ff 100%);
}

.casestudy-detail-page .case-hero::before {
  content: '';
  position: absolute;
  right: max(24px, calc((100vw - var(--container-max)) / 2 + 24px));
  top: 56px;
  width: 252px;
  height: 168px;
  border: 1px solid rgba(26,40,136,0.14);
  border-radius: 12px;
  background:
    linear-gradient(rgba(26,40,136,0.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(26,40,136,0.05) 1px, transparent 1px),
    rgba(255,255,255,0.72);
  background-size: 24px 24px;
  box-shadow: 0 18px 48px rgba(15,23,42,0.08);
}

.casestudy-detail-page .case-hero::after {
  content: 'SERVER LOGS  →  LOCAL LLM  →  STAFF REVIEW';
  position: absolute;
  right: max(42px, calc((100vw - var(--container-max)) / 2 + 42px));
  top: 96px;
  width: 216px;
  padding: 16px 18px;
  border-radius: 8px;
  background: rgba(255,255,255,0.9);
  border: 1px solid rgba(26,40,136,0.12);
  color: var(--primary);
  font-size: 11px;
  font-weight: 700;
  line-height: 1.8;
  letter-spacing: 0;
  box-shadow: 0 10px 30px rgba(15,23,42,0.06);
}

.casestudy-detail-page .case-hero__copy {
  position: relative;
  max-width: 800px;
  padding-left: 24px;
  border-left: 4px solid rgba(26,40,136,0.18);
}

.casestudy-detail-page .case-hero h1 {
  font-size: 39px;
  line-height: 1.42;
  margin-bottom: 16px;
}

.casestudy-detail-page .case-hero__lead {
  max-width: 780px;
  margin-bottom: 22px;
}

.casestudy-detail-page .case-hero__actions {
  margin-top: 4px;
}

.casestudy-detail-page .case-hero__actions .case-button,
.casestudy-detail-page .case-hero__actions .case-button--ghost {
  min-height: auto;
  padding: 0;
  border: 0;
  border-radius: 0;
  background: transparent;
  color: var(--primary);
  font-size: 14px;
  text-decoration: underline;
  text-underline-offset: 5px;
  box-shadow: none;
}

.casestudy-detail-page .case-hero__actions .case-button::after,
.casestudy-detail-page .case-hero__actions .case-button--ghost::after {
  content: '↓';
  margin-left: 6px;
  text-decoration: none;
}

.casestudy-detail-page .case-hero__actions .case-button:hover,
.casestudy-detail-page .case-hero__actions .case-button--ghost:hover {
  background: transparent;
  color: var(--primary-hover);
  border: 0;
}

.casestudy-detail-page .case-article-main {
  background: var(--surface);
}

.casestudy-detail-page .case-article h2 {
  font-size: 28px;
  padding-top: 2px;
}

.casestudy-detail-page .case-article h2::before {
  content: '';
  display: block;
  width: 48px;
  height: 3px;
  margin-bottom: 14px;
  border-radius: 999px;
  background: var(--border-strong);
}

.casestudy-detail-page #overview h2::before {
  display: none;
}

.casestudy-detail-page .case-text-card,
.casestudy-detail-page .case-compare__item,
.casestudy-detail-page .case-highlight,
.casestudy-detail-page .case-table-wrap,
.casestudy-detail-page .case-source-card {
  box-shadow: none;
}

.casestudy-detail-page .case-text-card:hover,
.casestudy-detail-page .case-card:hover {
  transform: none;
}

.casestudy-detail-page .case-cta-band .case-section__head {
  max-width: 780px;
}

@media (max-width: 920px) {
  .case-feature-card,
  .case-article-layout {
    grid-template-columns: 1fr;
  }

  .case-sidebar {
    position: static;
  }

  .case-card-grid,
  .case-card-grid--2,
  .case-compare {
    grid-template-columns: 1fr;
  }

  .casestudy-detail-page .case-hero::before,
  .casestudy-detail-page .case-hero::after {
    display: none;
  }
}

@media (max-width: 640px) {
  .case-hero,
  .casestudy-detail-page .case-hero {
    padding: 44px 0 38px;
  }

  .case-hero h1,
  .casestudy-detail-page .case-hero h1 {
    font-size: 29px;
  }

  .case-hero__lead,
  .casestudy-detail-page .case-hero__lead {
    font-size: 16px;
  }

  .casestudy-detail-page .case-hero__copy {
    padding-left: 18px;
  }

  .case-feature-card,
  .case-text-card,
  .case-sidebar__panel {
    padding: 22px;
  }

  .case-info-grid {
    grid-template-columns: 1fr;
  }

  .case-source-card figcaption {
    align-items: flex-start;
    flex-direction: column;
    gap: 4px;
  }

  .case-info-grid dt {
    padding-bottom: 4px;
    border-bottom: 0;
  }

  .case-section,
  .case-article,
  .casestudy-detail-page .case-section {
    padding: 52px 0;
  }

  .case-section__head h2,
  .case-article h2,
  .casestudy-detail-page .case-article h2 {
    font-size: 24px;
  }

  .case-process__step {
    grid-template-columns: 1fr;
  }
}