/*
Theme Name: ITOU Theme
Theme URI: 
Author: AI Agent
Author URI: 
Description: 伊藤商事コーポレートサイト用オリジナルテーマ (prototype.html準拠)
Version: 1.0.0
Text Domain: itou-theme
*/

/* ==========================================================================
   ベースCSS（prototype.htmlより完全準拠）
   ========================================================================== */
:root {
  --c-ink: #111827;
  --c-ink-light: #4B5563;
  --c-bg: #FFFFFF;
  --c-bg-alt: #F9FAFB;
  --c-border: #E5E7EB;
  --c-accent: #000000;
  --font-base: "Helvetica Neue", Arial, "Hiragino Kaku Gothic ProN", "Hiragino Sans", Meiryo, sans-serif;
}
* { margin: 0; padding: 0; box-sizing: border-box; }
body {
  font-family: var(--font-base);
  color: var(--c-ink);
  background-color: var(--c-bg);
  line-height: 1.6;
  font-size: clamp(14px, 1.5vw, 16px);
  -webkit-font-smoothing: antialiased;
}
a { color: var(--c-ink); text-decoration: none; transition: opacity 0.2s; }
a:hover { opacity: 0.7; }
img { max-width: 100%; height: auto; display: block; }
ul { list-style: none; }

.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 clamp(16px, 4vw, 40px);
}

/* Header */
.site-header {
  padding: clamp(16px, 3vw, 24px) 0;
  border-bottom: 1px solid var(--c-border);
}
.header-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 16px;
}
.site-title {
  font-size: clamp(20px, 2.5vw, 24px);
  font-weight: 700;
  letter-spacing: 0.05em;
}
.site-nav {
  display: flex;
  gap: clamp(16px, 3vw, 32px);
  font-size: clamp(13px, 1.2vw, 15px);
}
.site-nav ul {
  display: flex;
  gap: clamp(16px, 3vw, 32px);
}
.lang-switcher {
  font-size: 13px;
  color: var(--c-ink-light);
}

/* Hero & Fact Table */
.hero-section {
  padding: clamp(32px, 6vw, 64px) 0;
}
.hero-image {
  width: 100%;
  aspect-ratio: 16 / 7;
  background-color: #E5E7EB;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #9CA3AF;
  margin-bottom: clamp(32px, 6vw, 64px);
}
.fact-table {
  width: 100%;
  max-width: 800px;
  margin: 0 auto;
  border-collapse: collapse;
  font-size: clamp(13px, 1.2vw, 15px);
}
.fact-table th, .fact-table td {
  padding: clamp(12px, 2vw, 20px) clamp(16px, 3vw, 24px);
  border-bottom: 1px solid var(--c-border);
  text-align: left;
}
.fact-table th {
  width: 30%;
  font-weight: normal;
  color: var(--c-ink-light);
  background-color: var(--c-bg-alt);
}

/* Greeting Section */
.greeting-section {
  background-color: var(--c-bg-alt);
  padding: clamp(48px, 10vw, 96px) 0;
}
.greeting-inner {
  display: flex;
  gap: clamp(32px, 6vw, 64px);
  align-items: flex-start;
  max-width: 800px;
  margin: 0 auto;
}
.greeting-photo {
  flex: 0 0 clamp(120px, 20vw, 200px);
  aspect-ratio: 1;
  background-color: #E5E7EB;
}
.greeting-text h2 {
  font-size: clamp(20px, 2.5vw, 24px);
  margin-bottom: 24px;
  font-weight: normal;
}
.greeting-text p {
  margin-bottom: 24px;
}
.signature {
  text-align: right;
  color: var(--c-ink-light);
}

/* Business Section */
.business-section {
  padding: clamp(48px, 10vw, 96px) 0;
}
.section-title {
  font-size: clamp(24px, 3vw, 28px);
  text-align: center;
  margin-bottom: clamp(40px, 8vw, 64px);
  font-weight: normal;
  letter-spacing: 0.1em;
}
.business-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: clamp(24px, 4vw, 40px);
}

/* トップページは強制3列で中央揃え（空きスペース防止） */
body.home .business-grid {
  grid-template-columns: repeat(3, 1fr);
}

@media (max-width: 768px) {
  .business-grid,
  body.home .business-grid {
    grid-template-columns: 1fr;
  }
}
.biz-card {
  padding: clamp(24px, 4vw, 40px);
  border: 1px solid var(--c-border);
  display: flex;
  flex-direction: column;
}
.biz-title {
  font-size: clamp(16px, 1.8vw, 18px);
  margin-bottom: 24px;
  border-bottom: 1px solid var(--c-border);
  padding-bottom: 16px;
}
.biz-desc {
  color: var(--c-ink-light);
}

/* Updates Section (2 Column Logic) */
.updates-section {
  padding: clamp(48px, 10vw, 96px) 0;
  background-color: var(--c-bg-alt);
}
.updates-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: clamp(40px, 8vw, 80px);
}
@media (max-width: 768px) {
  .updates-grid { grid-template-columns: 1fr; }
  .greeting-inner { flex-direction: column; }
}
.updates-col-title {
  font-size: clamp(18px, 2vw, 20px);
  margin-bottom: 24px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--c-accent);
}
.update-list li {
  display: flex;
  gap: 16px;
  padding: 16px 0;
  border-bottom: 1px solid var(--c-border);
}
.update-date {
  color: var(--c-ink-light);
  font-size: 0.9em;
  flex-shrink: 0;
  min-width: 80px;
}
.update-title {
  flex-grow: 1;
}
.widget-placeholder {
  margin-top: 32px;
  padding: 40px 24px;
  border: 1px solid var(--c-border);
  background: var(--c-bg);
  text-align: center;
  color: var(--c-ink-light);
}

/* Footer */
.site-footer {
  border-top: 1px solid var(--c-border);
  padding: clamp(40px, 8vw, 80px) 0;
  text-align: center;
  font-size: 13px;
  color: var(--c-ink-light);
}

/* ==========================================================================
   下層ページ不具合対策用CSS (Gutenberg補完・アーカイブ用)
   ========================================================================== */

/* 1. ページタイトル (パンくずリスト含む共通ヘッダー) */
.page-header {
  padding: clamp(40px, 8vw, 64px) 0;
  background-color: var(--c-bg-alt);
  text-align: center;
  border-bottom: 1px solid var(--c-border);
  margin-bottom: clamp(40px, 8vw, 80px);
}
.page-title {
  font-size: clamp(24px, 3vw, 28px);
  font-weight: normal;
  letter-spacing: 0.1em;
}
.breadcrumb {
  font-size: 13px;
  color: var(--c-ink-light);
  margin-top: 16px;
}

/* 2. エディタ汎用コンテンツ (余白消失対策) */
.entry-content {
  max-width: 800px;
  margin: 0 auto;
  padding-bottom: clamp(48px, 10vw, 96px);
}
.entry-content > * {
  margin-bottom: 1.8em;
}
.entry-content > *:last-child {
  margin-bottom: 0;
}
.entry-content h2 {
  font-size: clamp(20px, 2.5vw, 24px);
  margin-top: 2.5em;
  margin-bottom: 1.2em;
  padding-bottom: 0.5em;
  border-bottom: 1px solid var(--c-border);
  font-weight: normal;
}
.entry-content h3 {
  font-size: clamp(18px, 2vw, 20px);
  margin-top: 2em;
  margin-bottom: 1em;
  font-weight: bold;
}
.entry-content ul, 
.entry-content ol {
  padding-left: 1.5em;
}
.entry-content ul {
  list-style-type: disc;
}
.entry-content ol {
  list-style-type: decimal;
}
.entry-content li {
  margin-bottom: 0.5em;
}
.entry-content blockquote {
  padding: 1.5em 2em;
  border-left: 4px solid var(--c-ink-light);
  background-color: var(--c-bg-alt);
  color: var(--c-ink-light);
}
.entry-content img {
  margin-top: 2em;
  margin-bottom: 2em;
  border-radius: 4px;
}

/* Gutenberg alignment */
.aligncenter { text-align: center; margin: 0 auto; }
.alignright { float: right; margin-left: 1.5em; }
.alignleft { float: left; margin-right: 1.5em; }
.wp-block-columns { display: flex; gap: 24px; margin-bottom: 1.8em; flex-wrap: wrap; }
.wp-block-column { flex: 1; min-width: 250px; }

/* 3. アーカイブ・一覧ページのレイアウト補完 */
.archive-list {
  max-width: 800px;
  margin: 0 auto;
  padding-bottom: clamp(48px, 10vw, 96px);
}
.archive-list .update-list li {
  display: flex;
  gap: 24px;
  padding: 24px 0;
  border-bottom: 1px solid var(--c-border);
  align-items: baseline;
}
@media (max-width: 600px) {
  .archive-list .update-list li {
    flex-direction: column;
    gap: 8px;
  }
}
.archive-list .update-date {
  color: var(--c-ink-light);
  font-size: 0.9em;
  flex-shrink: 0;
  min-width: 100px;
}
.archive-list .update-title {
  font-size: 1.1em;
  font-weight: bold;
}
.archive-list .update-excerpt {
  margin-top: 8px;
  font-size: 0.9em;
  color: var(--c-ink-light);
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

/* ページネーション */
.pagination {
  display: flex;
  justify-content: center;
  gap: 16px;
  margin-top: 48px;
}
.pagination a, .pagination span {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 40px;
  height: 40px;
  border: 1px solid var(--c-border);
  font-size: 14px;
}
.pagination .current {
  background-color: var(--c-ink);
  color: var(--c-bg);
  border-color: var(--c-ink);
}