/* ========================================
   ニュース専用CSS
   特殊運送・精密機器輸送業界
   ======================================== */

:root {
  --primary-color: #1a4d7a;
  --secondary-color: #2c7cb5;
  --accent-color: #ff8c42;
  --dark-bg: #0f2b45;
  --light-bg: #f4f7fa;
  --text-dark: #1a2a3a;
  --text-light: #4a5a6a;
  --text-white: #ffffff;
  --border-color: #d4dce5;
  --shadow: rgba(26, 77, 122, 0.15);
  --transition: all 0.3s ease;
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: 'Hiragino Kaku Gothic ProN', 'Hiragino Sans', 'Yu Gothic', 'Meiryo', sans-serif;
  font-size: 16px;
  line-height: 1.8;
  color: var(--text-dark);
  background-color: var(--light-bg);
  overflow-x: hidden;
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

a {
  text-decoration: none;
  color: var(--secondary-color);
  transition: var(--transition);
}

a:hover {
  color: var(--accent-color);
}

/* ========================================
   ヘッダー
   ======================================== */

.header {
  background: linear-gradient(135deg, var(--dark-bg) 0%, var(--primary-color) 100%);
  color: var(--text-white);
  padding: 1rem 0;
  position: sticky;
  top: 0;
  z-index: 1000;
  box-shadow: 0 4px 12px var(--shadow);
}

.nav {
  width: 100%;
}

.nav-container {
  max-width: 1400px;
  margin: 0 auto;
  padding: 0 2rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.logo-icon {
  width: 40px;
  height: 40px;
}

.logo-text {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text-white);
}

.nav-links {
  display: flex;
  gap: 2rem;
}

.nav-link {
  color: var(--text-white);
  font-weight: 500;
  padding: 0.5rem 1rem;
  border-radius: 4px;
  transition: var(--transition);
}

.nav-link:hover,
.nav-link.active {
  background-color: rgba(255, 255, 255, 0.1);
  color: var(--accent-color);
}

/* ========================================
   ニュースコンテナ
   ======================================== */

.news-container {
  max-width: 1400px;
  margin: 2rem auto;
  padding: 0 2rem;
  display: grid;
  grid-template-columns: 1fr 320px;
  gap: 2rem;
}

/* ========================================
   メインコンテンツ
   ======================================== */

.main-content {
  background: var(--text-white);
  border-radius: 12px;
  padding: 3rem;
  box-shadow: 0 4px 20px var(--shadow);
}

article {
  max-width: 100%;
}

/* 記事ヘッダー */
.article-header {
  margin-bottom: 2rem;
  padding-bottom: 1.5rem;
  border-bottom: 2px solid var(--border-color);
}

.article-title {
  font-size: 2rem;
  line-height: 1.4;
  color: var(--text-dark);
  margin-bottom: 1rem;
  font-weight: 700;
}

.article-meta {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  color: var(--text-light);
  font-size: 0.95rem;
}

.article-meta time {
  font-weight: 500;
}

/* アイキャッチ画像 */
.featured-image {
  width: 100%;
  max-height: 350px;
  object-fit: cover;
  border-radius: 8px;
  margin-bottom: 2rem;
  box-shadow: 0 4px 12px var(--shadow);
}

/* 記事本文 */
.article-content {
  font-size: 1.05rem;
  line-height: 1.9;
  color: var(--text-dark);
}

.article-content h2 {
  font-size: 1.6rem;
  margin: 2rem 0 1rem;
  color: var(--primary-color);
  font-weight: 700;
  padding-bottom: 0.5rem;
  border-bottom: 2px solid var(--accent-color);
}

.article-content h3 {
  font-size: 1.3rem;
  margin: 1.5rem 0 0.75rem;
  color: var(--primary-color);
  font-weight: 600;
}

.article-content p {
  margin-bottom: 1.5rem;
  text-align: justify;
}

.article-content a {
  color: var(--secondary-color);
  text-decoration: underline;
  font-weight: 500;
}

.article-content a:hover {
  color: var(--accent-color);
}

.article-content ul,
.article-content ol {
  margin: 1.5rem 0 1.5rem 2rem;
}

.article-content li {
  margin-bottom: 0.75rem;
}

.article-content blockquote {
  border-left: 4px solid var(--accent-color);
  padding: 1rem 1.5rem;
  margin: 1.5rem 0;
  background-color: var(--light-bg);
  border-radius: 4px;
  font-style: italic;
  color: var(--text-light);
}

/* ニュース提供元セクション */
.news-source-section {
  margin-top: 3rem;
  padding-top: 2rem;
  border-top: 2px solid var(--border-color);
}

.news-source-list {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 1rem;
  background-color: var(--light-bg);
  padding: 1.5rem;
  border-radius: 8px;
}

.news-source-list dt {
  font-weight: 700;
  color: var(--primary-color);
}

.news-source-list dd {
  color: var(--text-dark);
}

.news-source-list a {
  color: var(--secondary-color);
  font-weight: 500;
  text-decoration: underline;
}

.news-source-list a:hover {
  color: var(--accent-color);
}

/* シェアボタン */
.share-buttons {
  margin-top: 2rem;
  padding: 1.5rem;
  background-color: var(--light-bg);
  border-radius: 8px;
  text-align: center;
}

.share-buttons h3 {
  font-size: 1.1rem;
  margin-bottom: 1rem;
  color: var(--primary-color);
}

.share-button-group {
  display: flex;
  justify-content: center;
  gap: 1rem;
}

.share-button {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.75rem 1.5rem;
  border-radius: 6px;
  font-weight: 600;
  transition: var(--transition);
  color: var(--text-white);
}

.share-button.twitter {
  background-color: #1DA1F2;
}

.share-button.twitter:hover {
  background-color: #0d8bd9;
}

.share-button.facebook {
  background-color: #1877F2;
}

.share-button.facebook:hover {
  background-color: #0c63d4;
}

/* Amazon 広告 */
.amazon-banner {
  margin: 2rem 0;
  padding: 1.5rem;
  background: linear-gradient(135deg, #FF9900 0%, #FFB84D 100%);
  border-radius: 8px;
  text-align: center;
  box-shadow: 0 4px 12px rgba(255, 153, 0, 0.3);
  transition: var(--transition);
}

.amazon-banner:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 16px rgba(255, 153, 0, 0.4);
}

.amazon-banner a {
  color: var(--text-white);
  font-weight: 700;
  font-size: 1.1rem;
}

/* ========================================
   サイドバー
   ======================================== */

.sidebar {
  display: flex;
  flex-direction: column;
  gap: 2rem;
}

.sidebar-widget {
  background: var(--text-white);
  padding: 1.5rem;
  border-radius: 12px;
  box-shadow: 0 4px 12px var(--shadow);
}

.sidebar-widget h3 {
  font-size: 1.2rem;
  color: var(--primary-color);
  margin-bottom: 1rem;
  padding-bottom: 0.5rem;
  border-bottom: 2px solid var(--accent-color);
}

.sidebar-widget ul {
  list-style: none;
}

.sidebar-widget li {
  margin-bottom: 0.75rem;
}

.sidebar-widget a {
  color: var(--text-dark);
  display: block;
  padding: 0.5rem;
  border-radius: 4px;
  transition: var(--transition);
}

.sidebar-widget a:hover {
  background-color: var(--light-bg);
  color: var(--secondary-color);
}

/* 広告スペース */
.ad-space {
  background: linear-gradient(135deg, var(--light-bg) 0%, #e5eaf0 100%);
  padding: 2rem;
  border-radius: 8px;
  text-align: center;
  color: var(--text-light);
  min-height: 250px;
  display: flex;
  align-items: center;
  justify-content: center;
  border: 2px dashed var(--border-color);
}

/* ========================================
   ニュース一覧ページ
   ======================================== */

.news-list-container {
  max-width: 1400px;
  margin: 2rem auto;
  padding: 0 2rem;
}

.news-list-header {
  text-align: center;
  margin-bottom: 3rem;
}

.news-list-header h1 {
  font-size: 2.5rem;
  color: var(--primary-color);
  margin-bottom: 1rem;
}

.news-list-header p {
  color: var(--text-light);
  font-size: 1.1rem;
}

.news-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
  gap: 2rem;
  margin-bottom: 3rem;
}

.news-card {
  background: var(--text-white);
  border-radius: 12px;
  overflow: hidden;
  box-shadow: 0 4px 12px var(--shadow);
  transition: var(--transition);
}

.news-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 8px 24px var(--shadow);
}

.news-card-image {
  width: 100%;
  height: 200px;
  object-fit: cover;
}

.news-card-content {
  padding: 1.5rem;
}

.news-card-date {
  font-size: 0.9rem;
  color: var(--text-light);
  margin-bottom: 0.5rem;
}

.news-card-title {
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--text-dark);
  margin-bottom: 0.75rem;
  line-height: 1.4;
}

.news-card-excerpt {
  font-size: 0.95rem;
  color: var(--text-light);
  margin-bottom: 1rem;
  line-height: 1.6;
}

.news-card-link {
  display: inline-block;
  color: var(--secondary-color);
  font-weight: 600;
  padding: 0.5rem 1rem;
  border: 2px solid var(--secondary-color);
  border-radius: 6px;
  transition: var(--transition);
}

.news-card-link:hover {
  background-color: var(--secondary-color);
  color: var(--text-white);
}

/* ページネーション */
.pagination {
  display: flex;
  justify-content: center;
  gap: 0.5rem;
  margin: 3rem 0;
}

.pagination a,
.pagination span {
  padding: 0.75rem 1.25rem;
  border-radius: 6px;
  background: var(--text-white);
  color: var(--text-dark);
  font-weight: 600;
  transition: var(--transition);
  box-shadow: 0 2px 8px var(--shadow);
}

.pagination a:hover {
  background-color: var(--secondary-color);
  color: var(--text-white);
}

.pagination .current {
  background-color: var(--primary-color);
  color: var(--text-white);
}

/* ========================================
   フッター
   ======================================== */

.footer {
  background: linear-gradient(135deg, var(--dark-bg) 0%, var(--primary-color) 100%);
  color: var(--text-white);
  padding: 3rem 0 1rem;
  margin-top: 4rem;
}

.footer-container {
  max-width: 1400px;
  margin: 0 auto;
  padding: 0 2rem;
}

.footer-links {
  display: flex;
  justify-content: center;
  gap: 2rem;
  margin-bottom: 2rem;
  flex-wrap: wrap;
}

.footer-links a {
  color: var(--text-white);
  font-weight: 500;
  transition: var(--transition);
}

.footer-links a:hover {
  color: var(--accent-color);
}

.footer-copyright {
  text-align: center;
  padding-top: 1.5rem;
  border-top: 1px solid rgba(255, 255, 255, 0.2);
  color: rgba(255, 255, 255, 0.8);
}

/* ========================================
   レスポンシブ対応
   ======================================== */

@media (max-width: 1024px) {
  .news-container {
    grid-template-columns: 1fr;
  }

  .sidebar {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 1.5rem;
  }

  .news-grid {
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  }
}

@media (max-width: 768px) {
  .nav-container {
    flex-direction: column;
    gap: 1rem;
  }

  .nav-links {
    gap: 1rem;
  }

  .main-content {
    padding: 2rem 1.5rem;
  }

  .article-title {
    font-size: 1.6rem;
  }

  .news-list-header h1 {
    font-size: 2rem;
  }

  .news-grid {
    grid-template-columns: 1fr;
  }

  .share-button-group {
    flex-direction: column;
  }
}

@media (max-width: 480px) {
  body {
    font-size: 14px;
  }

  .news-container {
    padding: 0 1rem;
  }

  .main-content {
    padding: 1.5rem 1rem;
  }

  .article-title {
    font-size: 1.4rem;
  }

  .article-content {
    font-size: 1rem;
  }

  .footer-links {
    flex-direction: column;
    gap: 1rem;
    text-align: center;
  }
}