/* ========================================
   フジカンパニーブログ - メインスタイルシート
   ======================================== */

/* CSS Variables */
:root {
  --primary: #2c7be5;
  --primary-dark: #1a5fbf;
  --accent: #ff6b35;
  --text: #2d3748;
  --text-light: #718096;
  --bg: #ffffff;
  --bg-light: #f7fafc;
  --bg-dark: #1a202c;
  --border: #e2e8f0;
  --shadow: 0 2px 8px rgba(0,0,0,0.08);
  --shadow-hover: 0 4px 16px rgba(0,0,0,0.14);
  --radius: 8px;
  --max-width: 1100px;
  --content-width: 780px;
}

/* Reset & Base */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html { font-size: 16px; scroll-behavior: smooth; }

body {
  font-family: -apple-system, BlinkMacSystemFont, "Hiragino Sans", "Noto Sans JP", "メイリオ", sans-serif;
  color: var(--text);
  background: var(--bg);
  line-height: 1.8;
}

img { max-width: 100%; height: auto; display: block; }
a { color: var(--primary); text-decoration: none; }
a:hover { text-decoration: underline; }

/* Container */
.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 1.5rem;
}

/* ========================================
   Header
   ======================================== */
.site-header {
  background: var(--bg-dark);
  color: #fff;
  padding: 1.25rem 0;
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: 0 2px 10px rgba(0,0,0,0.3);
}

.site-title {
  font-size: 1.5rem;
  font-weight: 800;
  color: #fff;
  letter-spacing: -0.02em;
}
.site-title:hover { text-decoration: none; opacity: 0.9; }

.site-description {
  font-size: 0.8rem;
  color: rgba(255,255,255,0.6);
  margin: 0.15rem 0 0.75rem;
}

.site-nav { display: flex; gap: 1.5rem; flex-wrap: wrap; }
.site-nav a {
  color: rgba(255,255,255,0.85);
  font-size: 0.9rem;
  font-weight: 500;
  transition: color 0.2s;
}
.site-nav a:hover { color: #fff; text-decoration: none; }

/* ========================================
   Main Content
   ======================================== */
.main-content { padding: 2.5rem 0 4rem; }

/* ========================================
   Home Page
   ======================================== */
.home-hero {
  background: linear-gradient(135deg, var(--primary), #6c3de5);
  color: #fff;
  padding: 3rem 2rem;
  border-radius: var(--radius);
  margin-bottom: 3rem;
  text-align: center;
}
.home-hero h1 { font-size: 2rem; margin-bottom: 0.75rem; }
.home-hero p { font-size: 1.1rem; opacity: 0.9; }

/* Section Title */
.section-title {
  font-size: 1.4rem;
  font-weight: 800;
  margin-bottom: 1.5rem;
  padding-bottom: 0.5rem;
  border-bottom: 3px solid var(--primary);
}

/* ========================================
   Post Cards (Grid)
   ======================================== */
.posts-section { margin-bottom: 4rem; }

.posts-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 1.5rem;
}

.post-card {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow);
  transition: box-shadow 0.2s, transform 0.2s;
}
.post-card:hover {
  box-shadow: var(--shadow-hover);
  transform: translateY(-2px);
}

.post-card-image img {
  width: 100%;
  height: 180px;
  object-fit: cover;
}

.post-card-body { padding: 1.25rem; }

.post-card-categories { margin-bottom: 0.5rem; }

.post-card-title {
  font-size: 1.05rem;
  font-weight: 700;
  margin-bottom: 0.6rem;
  line-height: 1.5;
}
.post-card-title a { color: var(--text); }
.post-card-title a:hover { color: var(--primary); text-decoration: none; }

.post-card-excerpt {
  font-size: 0.88rem;
  color: var(--text-light);
  margin-bottom: 0.75rem;
  line-height: 1.6;
}

.post-card-meta {
  font-size: 0.8rem;
  color: var(--text-light);
}

/* Category Badge */
.category-badge {
  display: inline-block;
  background: var(--primary);
  color: #fff;
  font-size: 0.75rem;
  font-weight: 600;
  padding: 0.15rem 0.6rem;
  border-radius: 20px;
  margin-right: 0.4rem;
  margin-bottom: 0.4rem;
}
.category-badge:hover { background: var(--primary-dark); text-decoration: none; }

/* Load More */
.load-more { text-align: center; margin-top: 2rem; }
.btn-primary {
  display: inline-block;
  background: var(--primary);
  color: #fff;
  padding: 0.75rem 2rem;
  border-radius: 25px;
  font-weight: 600;
  transition: background 0.2s;
}
.btn-primary:hover { background: var(--primary-dark); text-decoration: none; }

/* ========================================
   Categories Section
   ======================================== */
.categories-section { margin-bottom: 4rem; }
.categories-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 1.25rem;
}
.category-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 2rem 1.5rem;
  background: var(--bg-light);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  text-align: center;
  transition: box-shadow 0.2s, transform 0.2s;
}
.category-card:hover {
  box-shadow: var(--shadow-hover);
  transform: translateY(-2px);
  text-decoration: none;
}
.category-icon { font-size: 2.5rem; margin-bottom: 0.6rem; }
.category-name { font-size: 1.1rem; font-weight: 700; color: var(--text); margin-bottom: 0.4rem; }
.category-desc { font-size: 0.85rem; color: var(--text-light); }

/* ========================================
   Article / Post
   ======================================== */
.post-header { margin-bottom: 2rem; }

.post-categories { margin-bottom: 1rem; }

.post-title {
  font-size: 2rem;
  font-weight: 800;
  line-height: 1.4;
  margin-bottom: 1rem;
}

.post-meta {
  display: flex;
  align-items: center;
  gap: 1rem;
  font-size: 0.875rem;
  color: var(--text-light);
  margin-bottom: 1rem;
}

.post-description {
  font-size: 1.1rem;
  color: var(--text-light);
  line-height: 1.7;
  padding: 1rem;
  background: var(--bg-light);
  border-left: 4px solid var(--primary);
  border-radius: 0 var(--radius) var(--radius) 0;
}

/* Table of Contents */
.toc-box {
  background: var(--bg-light);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.25rem 1.5rem;
  margin: 2rem 0;
}
.toc-title {
  font-weight: 700;
  margin-bottom: 0.75rem;
  font-size: 0.95rem;
  color: var(--text-light);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}
#toc ul { padding-left: 1.2rem; }
#toc li { margin: 0.3rem 0; font-size: 0.95rem; }
#toc a { color: var(--primary); }

/* Affiliate Notice */
.affiliate-notice {
  background: #fffbeb;
  border: 1px solid #f6ad55;
  border-radius: var(--radius);
  padding: 0.75rem 1rem;
  margin: 1.5rem 0;
  font-size: 0.85rem;
  color: #744210;
}

/* Post Content Typography */
.post-content {
  max-width: var(--content-width);
}
.post-content h2 {
  font-size: 1.6rem;
  font-weight: 800;
  margin: 2.5rem 0 1rem;
  padding-bottom: 0.5rem;
  border-bottom: 2px solid var(--border);
}
.post-content h3 {
  font-size: 1.3rem;
  font-weight: 700;
  margin: 2rem 0 0.75rem;
  color: var(--primary-dark);
}
.post-content h4 {
  font-size: 1.1rem;
  font-weight: 700;
  margin: 1.5rem 0 0.5rem;
}
.post-content p { margin: 1rem 0; }
.post-content ul, .post-content ol {
  margin: 1rem 0;
  padding-left: 2rem;
}
.post-content li { margin: 0.4rem 0; }
.post-content blockquote {
  border-left: 4px solid var(--primary);
  padding: 0.75rem 1.25rem;
  margin: 1.5rem 0;
  background: var(--bg-light);
  color: var(--text-light);
  font-style: italic;
  border-radius: 0 var(--radius) var(--radius) 0;
}
.post-content pre {
  background: var(--bg-dark);
  color: #e2e8f0;
  padding: 1.25rem;
  border-radius: var(--radius);
  overflow-x: auto;
  margin: 1.5rem 0;
  font-size: 0.9rem;
}
.post-content code {
  background: #edf2f7;
  padding: 0.15rem 0.4rem;
  border-radius: 4px;
  font-size: 0.9em;
  font-family: "Fira Code", "Source Code Pro", monospace;
}
.post-content pre code {
  background: none;
  padding: 0;
  font-size: inherit;
}
.post-content table {
  width: 100%;
  border-collapse: collapse;
  margin: 1.5rem 0;
  font-size: 0.95rem;
}
.post-content th, .post-content td {
  border: 1px solid var(--border);
  padding: 0.6rem 0.9rem;
  text-align: left;
}
.post-content th { background: var(--bg-light); font-weight: 700; }
.post-content tr:nth-child(even) td { background: #f9fafb; }

/* Affiliate Link Style */
.post-content a.affiliate-link,
.amazon-link {
  display: inline-block;
  background: #ff9900;
  color: #111;
  padding: 0.5rem 1.2rem;
  border-radius: 4px;
  font-weight: 700;
  font-size: 0.95rem;
  margin: 0.5rem 0;
  transition: background 0.2s;
}
.amazon-link:hover { background: #e68a00; text-decoration: none; }

/* Amazon Product Box */
.amazon-product-box {
  border: 2px solid #ff9900;
  border-radius: var(--radius);
  padding: 1.25rem;
  margin: 2rem 0;
  display: flex;
  gap: 1.25rem;
  align-items: flex-start;
  background: #fffdf5;
}
.amazon-product-image { flex-shrink: 0; width: 100px; }
.amazon-product-info { flex: 1; }
.amazon-product-title { font-weight: 700; margin-bottom: 0.5rem; }
.amazon-product-price { color: #b12704; font-weight: 700; margin-bottom: 0.75rem; }

/* Post Footer */
.post-footer { margin-top: 3rem; padding-top: 2rem; border-top: 1px solid var(--border); }

.post-tags { margin-bottom: 1.5rem; }
.tag {
  display: inline-block;
  background: var(--bg-light);
  border: 1px solid var(--border);
  color: var(--text);
  font-size: 0.8rem;
  padding: 0.2rem 0.7rem;
  border-radius: 20px;
  margin-right: 0.4rem;
  margin-bottom: 0.4rem;
}
.tag:hover { background: var(--primary); color: #fff; border-color: var(--primary); text-decoration: none; }

/* Share Buttons */
.share-buttons { margin-bottom: 2rem; }
.share-label { font-weight: 600; margin-bottom: 0.75rem; font-size: 0.9rem; }
.share-btn {
  display: inline-block;
  padding: 0.5rem 1.2rem;
  border-radius: 4px;
  font-size: 0.875rem;
  font-weight: 600;
  color: #fff;
  margin-right: 0.6rem;
  margin-bottom: 0.4rem;
  transition: opacity 0.2s;
}
.share-btn:hover { opacity: 0.85; text-decoration: none; }
.share-twitter { background: #1da1f2; }
.share-facebook { background: #1877f2; }
.share-hatena { background: #008fde; }

/* Related Posts */
.related-posts h3 { font-size: 1.2rem; margin-bottom: 1rem; }
.related-posts ul { list-style: none; padding: 0; }
.related-posts li { padding: 0.5rem 0; border-bottom: 1px solid var(--border); }
.related-posts li:last-child { border-bottom: none; }

/* ========================================
   Affiliate Section (homepage)
   ======================================== */
.affiliate-section { margin-bottom: 3rem; }
.affiliate-banner {
  background: var(--bg-light);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.5rem;
}
.affiliate-label {
  font-weight: 700;
  font-size: 0.85rem;
  color: var(--text-light);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 1rem;
}

/* ========================================
   Footer
   ======================================== */
.site-footer {
  background: var(--bg-dark);
  color: rgba(255,255,255,0.7);
  padding: 2rem 0;
  text-align: center;
  font-size: 0.875rem;
}
.footer-links { margin-bottom: 0.75rem; }
.footer-links a { color: rgba(255,255,255,0.7); margin: 0 0.5rem; }
.footer-links a:hover { color: #fff; }
.affiliate-disclosure {
  margin-bottom: 0.75rem;
  font-size: 0.8rem;
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
  color: rgba(255,255,255,0.5);
}
.copyright { color: rgba(255,255,255,0.4); }

/* ========================================
   Responsive
   ======================================== */
@media (max-width: 768px) {
  .home-hero h1 { font-size: 1.5rem; }
  .post-title { font-size: 1.5rem; }
  .posts-grid { grid-template-columns: 1fr; }
  .categories-grid { grid-template-columns: 1fr; }
  .site-nav { gap: 1rem; }
  .amazon-product-box { flex-direction: column; }
  .amazon-product-image { width: 120px; }
}