/* AI事業部ページ用スタイル（既存サイトのカラースキームに統一） */
/* 既存サイト（chizai-biz.com）のダークネイビー基調 + ピンク/赤アクセント */

:root {
  --brand-dark: #1a2332; /* ダークネイビー（既存サイトメイン） */
  --brand-accent: #e91e63; /* ピンク/赤系アクセント */
  --brand-contrast: #ffffff;
  --text-muted: #6b7280;
  --bg-light: #f9fafb;
  --border-light: #e5e7eb;
}

header.site-header {
  background: var(--brand-dark);
  border-bottom: none;
  padding: 1.25rem 0;
}

header.site-header .brand {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-weight: 700;
  color: var(--brand-contrast);
  text-decoration: none;
  font-size: 1.1rem;
}

header.site-header nav ul {
  gap: 1rem;
}

header.site-header nav ul li a {
  color: rgba(255, 255, 255, 0.95);
  font-weight: 500;
  padding: 0.5rem 0.75rem;
  display: inline-block;
}

header.site-header nav ul li a:hover,
header.site-header nav ul li a[aria-current] {
  color: var(--brand-contrast);
  font-weight: 600;
}

nav.site-nav a[role="button"],
nav.site-nav a.button {
  background: var(--brand-accent);
  color: var(--brand-contrast);
  border: none;
}

.site-container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 3rem 1.5rem;
}

.hero {
  background: linear-gradient(135deg, var(--brand-dark) 0%, #2c3e50 100%);
  color: var(--brand-contrast);
  border: none;
  border-radius: 0;
  padding: 4rem 2rem;
  margin-bottom: 3rem;
  text-align: center;
}

.hero h1 {
  margin-bottom: 1rem;
  font-size: 2.5rem;
  font-weight: 700;
}

.hero p.lead {
  color: rgba(255, 255, 255, 0.9);
  margin-bottom: 0;
  font-size: 1.15rem;
}

.card {
  border: 1px solid var(--border-light);
  border-radius: 8px;
  padding: 1.5rem;
  background: #fff;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.05);
  transition: box-shadow 0.2s;
}

.card:hover {
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
}

.card h3 {
  color: var(--brand-dark);
  margin-bottom: 0.75rem;
  font-size: 1.25rem;
}

.card p {
  line-height: 1.7;
}

.card small {
  color: var(--text-muted);
  font-size: 0.875rem;
}

footer.site-footer {
  background: var(--brand-dark);
  color: rgba(255, 255, 255, 0.85);
  font-size: 0.9rem;
  padding: 2rem 1rem;
  text-align: center;
  border-top: none;
}

footer.site-footer small {
  color: rgba(255, 255, 255, 0.85);
}

/* 細かい可読性向上 */
ul.tight > li { 
  margin-bottom: 0.5rem;
  line-height: 1.6;
}
ul.relaxed > li { 
  margin-bottom: 0.75rem;
  line-height: 1.7;
}

/* リストの視認性向上 */
section > p,
.card > p {
  line-height: 1.7;
  margin-bottom: 1rem;
}

section > p:last-child,
.card > p:last-child {
  margin-bottom: 0;
}

/* セクション見出し */
section {
  margin-bottom: 3rem;
}

section h2 {
  color: var(--brand-dark);
  border-left: 4px solid var(--brand-accent);
  padding-left: 1rem;
  margin-top: 4rem;
  margin-bottom: 1.5rem;
  font-size: 1.75rem;
}

section:first-of-type h2 {
  margin-top: 0;
}

/* detailsの見栄え微調整 */
details {
  border: 1px solid var(--border-light);
  border-radius: 8px;
  padding: 1rem 1.25rem;
  margin-bottom: 0.75rem;
  background: var(--bg-light);
  transition: all 0.2s;
}
details summary {
  cursor: pointer;
  font-weight: 600;
  color: var(--brand-dark);
  font-size: 1.05rem;
}
details summary strong {
  color: var(--brand-dark);
}
details[open] {
  background: #fff;
  border-color: var(--brand-accent);
}

details p,
details ul,
details ol {
  margin-top: 1rem;
  line-height: 1.7;
}

details small {
  color: var(--text-muted);
}

/* ボタンの見た目調整 */
a.button,
a[role="button"] {
  display: inline-block;
  padding: 0.875rem 2rem;
  background: var(--brand-accent);
  color: var(--brand-contrast);
  text-decoration: none;
  border-radius: 6px;
  font-weight: 600;
  transition: background 0.2s;
  font-size: 1rem;
}
a.button:hover,
a[role="button"]:hover {
  background: #c2185b;
  color: var(--brand-contrast);
}

/* グリッドレイアウトの調整 */
.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 2rem;
  margin-top: 2rem;
}

/* プロフィールセクション */
.profile-container {
  display: grid;
  grid-template-columns: 200px 1fr;
  gap: 3rem;
  margin-top: 2rem;
}

.profile-photo {
  position: relative;
}

.photo-placeholder {
  width: 200px;
  height: 200px;
  background: linear-gradient(135deg, var(--brand-dark) 0%, #2c3e50 100%);
  border-radius: 8px;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
}

.profile-content h3 {
  color: var(--text-muted);
  font-size: 0.95rem;
  font-weight: 500;
  margin-bottom: 0.5rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.profile-name {
  color: var(--brand-dark);
  font-size: 2rem;
  font-weight: 700;
  margin-bottom: 1.5rem;
  margin-top: 0;
}

.profile-roles {
  margin-bottom: 2rem;
  padding-bottom: 2rem;
  border-bottom: 1px solid var(--border-light);
}

.profile-roles ul {
  list-style: none;
  padding-left: 0;
}

.profile-roles ul li {
  color: var(--brand-dark);
  font-weight: 500;
  margin-bottom: 0.5rem;
}

.profile-description p {
  margin-bottom: 1rem;
  line-height: 1.8;
}

/* 実績セクション */
.achievements {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
  gap: 2rem;
  margin-top: 2rem;
}

.achievements .card h3 {
  color: var(--brand-dark);
  margin-bottom: 1rem;
  padding-bottom: 0.75rem;
  border-bottom: 2px solid var(--brand-accent);
}

.achievements .card ul {
  list-style: none;
  padding-left: 0;
}

.achievements .card ul li {
  padding-left: 1.5rem;
  position: relative;
  margin-bottom: 0.75rem;
  line-height: 1.7;
}

.achievements .card ul li::before {
  content: "▸";
  position: absolute;
  left: 0;
  color: var(--brand-accent);
  font-weight: bold;
}

/* レスポンシブ対応 */
@media (max-width: 768px) {
  .hero {
    padding: 3rem 1.5rem;
  }
  
  .hero h1 {
    font-size: 2rem;
  }
  
  .hero p.lead {
    font-size: 1rem;
  }
  
  section h2 {
    font-size: 1.5rem;
  }
  
  .grid {
    grid-template-columns: 1fr;
  }
  
  .profile-container {
    grid-template-columns: 1fr;
    gap: 2rem;
  }
  
  .photo-placeholder {
    width: 150px;
    height: 150px;
    margin: 0 auto;
  }
  
  .achievements {
    grid-template-columns: 1fr;
  }
}