/* REDDESK JOURNAL - Global Styles */

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

html {
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Helvetica Neue', 'Hiragino Kaku Gothic ProN', 'Yu Gothic', Meiryo, sans-serif;
  line-height: 1.7;
  color: #333333;
  background-color: #ffffff;
  overflow-x: hidden;
}

a {
  color: #0066cc;
  text-decoration: none;
  transition: color 0.3s ease;
}

a:hover {
  color: #0052a3;
  text-decoration: underline;
}

/* ===== HEADER ===== */

.site-header {
  background-color: #ffffff;
  border-bottom: 1px solid #eeeeee;
  position: static;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.04);
}

.header-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 1rem 2rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.site-logo {
  font-size: 1.5rem;
  font-weight: 600;
  color: #333333;
  text-decoration: none;
  letter-spacing: -0.5px;
}

.site-logo:hover {
  color: #0066cc;
  text-decoration: none;
}

.site-nav {
  display: flex;
  gap: 2rem;
  align-items: center;
  list-style: none;
}

.nav-item a {
  font-size: 0.95rem;
  font-weight: 500;
  color: #333333;
}

.nav-item a:hover {
  color: #0066cc;
}

.nav-item.external a {
  color: #0066cc;
  font-weight: 600;
}

/* Mobile menu */
.mobile-nav-toggle {
  display: none;
  background: none;
  border: none;
  font-size: 1.5rem;
  cursor: pointer;
  color: #333333;
}

/* ===== HERO / FIRST VIEW ===== */

.hero {
  background-color: #ffffff;
  padding: 5rem 2rem;
  text-align: center;
  border-bottom: 1px solid #eeeeee;
}

.hero-inner {
  max-width: 1000px;
  margin: 0 auto;
}

.hero h1 {
  font-size: 3rem;
  font-weight: 700;
  line-height: 1.2;
  color: #333333;
  margin-bottom: 1.5rem;
  letter-spacing: -1.5px;
  word-spacing: 0.1em;
}

.hero .tagline {
  font-size: 1.3rem;
  line-height: 1.7;
  color: #555555;
  margin-bottom: 1.5rem;
  font-weight: 500;
  letter-spacing: 0.02em;
}

.hero .description {
  font-size: 1rem;
  line-height: 1.9;
  color: #666666;
  margin-bottom: 0;
  max-width: 800px;
  margin-left: auto;
  margin-right: auto;
  letter-spacing: 0.01em;
}

/* ===== CONTAINER & LAYOUT ===== */

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 2rem;
}

.main {
  /* <main class="container main"> は同一要素に .container と .main の
     両方が付く。ここを margin: 3rem 0; にすると、後に定義されている
     この規則が .container の margin: 0 auto; を上書きし、左右中央配置が
     効かなくなる（PCワイド画面でコンテンツが左に寄る原因）。
     縦方向の余白だけを指定し、左右は auto のままにして中央配置を維持する。 */
  margin: 3rem auto;
}

/* ===== SECTIONS ===== */

.section {
  margin: 3rem 0;
  padding: 0;
}

.section-title {
  font-size: 1.75rem;
  font-weight: 700;
  color: #333333;
  margin-bottom: 2.5rem;
  text-align: center;
  border-bottom: 2px solid #eeeeee;
  padding-bottom: 1.5rem;
  letter-spacing: -0.5px;
}

/* ===== CATEGORIES ===== */

.categories {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 3rem 2.5rem;
  margin: 3rem 0;
}

.category-card {
  background: transparent;
  border: none;
  border-top: 2px solid #eeeeee;
  padding: 2rem 0;
  transition: all 0.3s ease;
}

.category-card:hover {
  border-top-color: #cccccc;
}

.category-card h3 {
  font-size: 1.25rem;
  font-weight: 700;
  color: #333333;
  margin-bottom: 1.2rem;
  letter-spacing: -0.5px;
}

.category-card p {
  font-size: 0.95rem;
  line-height: 1.8;
  color: #666666;
  margin-bottom: 1.5rem;
  letter-spacing: 0.01em;
}

.category-card .link {
  display: inline-block;
  color: #0066cc;
  font-weight: 500;
  text-decoration: none;
  font-size: 0.9rem;
  border-bottom: 1px solid #cce5ff;
  padding-bottom: 2px;
}

.category-card .link:hover {
  border-bottom-color: #0066cc;
  text-decoration: none;
}

/* ===== ARTICLES / NEWS ===== */

.articles-list {
  list-style: none;
}

.article-item {
  border-bottom: 1px solid #eeeeee;
  padding: 2rem 0;
}

.article-item:last-child {
  border-bottom: none;
}

.article-meta {
  display: flex;
  gap: 1rem;
  align-items: center;
  flex-wrap: wrap;
  margin-bottom: 0.8rem;
  font-size: 0.85rem;
}

.article-meta .date {
  color: #999999;
}

.article-meta .category-tag a {
  display: inline-block;
  background-color: #f0f0f0;
  color: #0066cc;
  padding: 0.3rem 0.75rem;
  border-radius: 3px;
  font-size: 0.8rem;
  font-weight: 500;
  text-decoration: none;
}

.article-meta .category-tag a:hover {
  background-color: #e8e8e8;
  text-decoration: none;
}

.article-item h3 {
  font-size: 1.2rem;
  font-weight: 700;
  color: #333333;
  margin-bottom: 0.7rem;
  line-height: 1.4;
  letter-spacing: -0.3px;
}

.article-item a {
  color: #0066cc;
}

.article-item a:hover {
  color: #0052a3;
}

.article-excerpt {
  font-size: 0.95rem;
  color: #666666;
  line-height: 1.7;
  margin-top: 0.7rem;
  letter-spacing: 0.01em;
}

/* ===== ABOUT SECTION ===== */

.about-section {
  background-color: #fafafa;
  padding: 3rem 2rem;
  border-radius: 4px;
  margin: 2rem 0;
}

.about-section h2 {
  font-size: 1.5rem;
  font-weight: 700;
  color: #333333;
  margin-bottom: 1rem;
}

.about-section p {
  font-size: 0.95rem;
  line-height: 1.8;
  color: #666666;
  margin-bottom: 1rem;
}

/* ===== SERVICE CTA ===== */

.service-cta {
  background-color: #fafafa;
  border-top: 1px solid #eeeeee;
  border-bottom: 1px solid #eeeeee;
  padding: 3rem 2rem;
  text-align: center;
  margin: 3rem 0;
}

.service-cta h3 {
  font-size: 1.25rem;
  font-weight: 700;
  color: #333333;
  margin-bottom: 1.5rem;
  letter-spacing: -0.5px;
}

.service-cta p {
  font-size: 0.95rem;
  line-height: 1.8;
  color: #666666;
  margin-bottom: 1.2rem;
  letter-spacing: 0.01em;
}

.service-cta .price {
  font-size: 1.15rem;
  font-weight: 700;
  color: #333333;
  margin-bottom: 2rem;
}

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

.btn {
  display: inline-block;
  padding: 0.75rem 1.5rem;
  border: 1px solid #0066cc;
  background-color: #0066cc;
  color: #ffffff;
  text-decoration: none;
  border-radius: 4px;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.3s ease;
  font-size: 0.95rem;
}

.btn:hover {
  background-color: #0052a3;
  border-color: #0052a3;
  text-decoration: none;
}

.btn-secondary {
  background-color: transparent;
  border: 1px solid #0066cc;
  color: #0066cc;
}

.btn-secondary:hover {
  background-color: #0066cc;
  color: #ffffff;
}

/* ===== FOOTER ===== */

.site-footer {
  background-color: #fafafa;
  border-top: 1px solid #eeeeee;
  padding: 3rem 2rem;
  margin-top: 3rem;
}

.footer-inner {
  max-width: 1200px;
  margin: 0 auto;
}

.footer-content {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 2rem;
  margin-bottom: 2rem;
  font-size: 0.9rem;
}

.footer-section h4 {
  font-weight: 700;
  color: #333333;
  margin-bottom: 1rem;
}

.footer-section ul {
  list-style: none;
}

.footer-section li {
  margin-bottom: 0.5rem;
}

.footer-section a {
  color: #0066cc;
  font-size: 0.9rem;
}

.footer-bottom {
  border-top: 1px solid #eeeeee;
  padding-top: 2rem;
  text-align: center;
  color: #999999;
  font-size: 0.85rem;
}

/* ===== ARTICLE PAGE ===== */

.article-header {
  padding: 2rem 0;
  border-bottom: 1px solid #eeeeee;
  margin-bottom: 2rem;
}

.article-title {
  font-size: 2rem;
  font-weight: 700;
  color: #333333;
  margin-bottom: 1rem;
  line-height: 1.3;
}

.article-meta-info {
  display: flex;
  gap: 1.5rem;
  flex-wrap: wrap;
  font-size: 0.9rem;
  color: #666666;
}

.article-meta-info .date {
  display: flex;
  align-items: center;
  gap: 1rem;
  flex-wrap: wrap;
}

.article-meta-info .category {
  display: inline-block;
  background-color: #f0f0f0;
  padding: 0.25rem 0.75rem;
  border-radius: 3px;
  font-size: 0.85rem;
}

.article-body {
  font-size: 1rem;
  line-height: 1.95;
  color: #333333;
  max-width: 680px;
  margin: 0 auto;
  letter-spacing: 0.01em;
}

.article-body h2 {
  font-size: 1.6rem;
  font-weight: 700;
  color: #333333;
  margin: 2.5rem 0 1.2rem;
  border-bottom: 2px solid #eeeeee;
  padding-bottom: 0.8rem;
  letter-spacing: -0.5px;
}

.article-body h3 {
  font-size: 1.25rem;
  font-weight: 700;
  color: #333333;
  margin: 2rem 0 1rem;
  letter-spacing: -0.3px;
}

.article-body p {
  margin-bottom: 1.3rem;
}

.article-body ul,
.article-body ol {
  margin-bottom: 1.3rem;
  margin-left: 1.8rem;
  line-height: 2;
}

.article-body li {
  margin-bottom: 0.8rem;
}

/* Table of Contents */
.toc {
  background-color: #fafafa;
  border: 1px solid #dddddd;
  padding: 1.5rem;
  border-radius: 4px;
  margin: 2rem 0;
  font-size: 0.95rem;
}

.toc-title {
  font-weight: 700;
  margin-bottom: 1rem;
  color: #333333;
}

.toc ul {
  list-style: none;
  margin-left: 0;
}

.toc li {
  margin: 0.5rem 0;
  margin-left: 1rem;
}

.toc a {
  color: #0066cc;
}

/* Breadcrumb */
.breadcrumb {
  font-size: 0.85rem;
  color: #666666;
  margin-bottom: 1.5rem;
}

.breadcrumb a {
  color: #0066cc;
}

.breadcrumb .separator {
  margin: 0 0.5rem;
  color: #999999;
}

/* Related Articles */
.related-articles {
  background-color: #fafafa;
  padding: 2rem;
  border-radius: 4px;
  margin: 2rem 0;
}

.related-articles h3 {
  font-size: 1.3rem;
  font-weight: 700;
  color: #333333;
  margin-bottom: 1.5rem;
}

.related-list {
  list-style: none;
}

.related-item {
  margin-bottom: 1rem;
}

.related-item a {
  color: #0066cc;
  font-weight: 500;
}

/* ===== RESPONSIVE ===== */

@media (max-width: 768px) {
  /* スマホではナビを隠し、ハンバーガーで開閉する */
  .site-nav {
    display: none;
  }

  /* 開いたときは縦並びにする。
     PC用の横並び(flex-direction: row + gap: 2rem)のまま表示すると
     項目が画面幅に収まらず、ページ全体に横スクロールが発生するため。 */
  .site-nav.is-open {
    display: flex;
    flex-direction: column;
    align-items: stretch;
    gap: 0;

    /* ヘッダーの下に全幅で開く */
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background-color: #ffffff;
    border-bottom: 1px solid #eeeeee;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.04);
    padding: 0.5rem 0;
    z-index: 100;
  }

  .site-nav.is-open .nav-item a {
    display: block;
    padding: 0.9rem 1rem;
    border-bottom: 1px solid #f5f5f5;
  }

  .site-nav.is-open .nav-item:last-child a {
    border-bottom: none;
  }

  /* 開いたナビの位置の基準にする */
  .header-inner {
    position: relative;
  }

  .mobile-nav-toggle {
    display: block;
  }

  .hero h1 {
    font-size: 1.8rem;
  }

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

  .categories {
    grid-template-columns: 1fr;
    gap: 1.5rem;
  }

  .article-title {
    font-size: 1.5rem;
  }

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

  .btn {
    width: 100%;
    text-align: center;
  }

  .footer-content {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 480px) {
  .header-inner {
    padding: 1rem;
  }

  .container {
    padding: 0 1rem;
  }

  .hero h1 {
    font-size: 1.5rem;
  }

  .hero {
    padding: 2rem 1rem;
  }

  .section {
    padding: 1rem;
  }

  .service-cta {
    padding: 1.5rem;
  }

  .article-title {
    font-size: 1.3rem;
  }
}

/* ===== 記事内の表・図・引用（2026-11-04追加） ===== */
.article-body .table-wrap {
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  margin: 0 0 1.5rem;
}

.article-body table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.95rem;
  line-height: 1.7;
  margin: 0 0 1.5rem;
}

.article-body .table-wrap table {
  margin: 0;
  min-width: 480px;
}

.article-body th,
.article-body td {
  border: 1px solid #dddddd;
  padding: 0.6rem 0.8rem;
  text-align: left;
  vertical-align: top;
}

.article-body th {
  background-color: #fafafa;
  font-weight: 700;
}

.article-body td.num {
  text-align: right;
  white-space: nowrap;
}

.article-body .article-figure {
  margin: 2rem 0;
}

.article-body .article-figure img {
  display: block;
  width: 100%;
  height: auto;
  border-radius: 4px;
}

.article-body .article-figure figcaption {
  font-size: 0.8rem;
  color: #999999;
  text-align: right;
  margin-top: 0.4rem;
}

.article-body blockquote {
  margin: 0 0 1.5rem;
  padding: 1rem 1.25rem;
  border-left: 4px solid #dddddd;
  background-color: #fafafa;
  color: #555555;
}

.article-body blockquote p {
  margin: 0;
}