/* Reset and Base Styles */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: 'New Tegomin', 'Shippori Mincho', serif;
  line-height: 1.7;
  color: #1a1a1a;
  background-color: #fafafa;
  letter-spacing: 0.02em;
}

.container {
  max-width: 680px;
  margin: 0 auto;
  padding: 0 60px;
}

/* Header */
.site-header {
  background-color: transparent;
  padding: 60px 0 40px 0;
  border-bottom: 1px solid #e0e0e0;
}

.header-container {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.site-title {
  margin: 0;
  font-size: 1.6rem;
  font-weight: 400;
  letter-spacing: 0.05em;
  font-family: 'New Tegomin', 'Shippori Mincho', serif;
}

.site-title a {
  color: #000;
  text-decoration: none;
  transition: opacity 0.2s ease;
}

.site-title a:hover {
  opacity: 0.6;
}

.about-link {
  display: flex;
  align-items: center;
  gap: 8px;
  text-decoration: none;
  color: #666;
  font-size: 0.85rem;
  font-weight: 400;
  letter-spacing: 0.02em;
  transition: opacity 0.2s ease;
}

.about-link:hover {
  opacity: 0.6;
}

.about-icon {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  object-fit: cover;
  filter: grayscale(100%);
  transition: filter 0.3s ease;
}

.about-link:hover .about-icon {
  filter: grayscale(0%);
}

.site-nav {
  display: flex;
  gap: 32px;
  font-size: 0.95rem;
  font-weight: 500;
}

.site-nav a {
  color: #666;
  text-decoration: none;
  transition: color 0.2s ease;
  letter-spacing: 0.02em;
}

.site-nav a:hover {
  color: #000;
}

/* Main Content */
.site-content {
  min-height: calc(100vh - 200px);
  padding: 60px 0;
}

/* Post List */
.post-list {
  list-style: none;
}

.post-item {
  margin-bottom: 16px;
  padding-bottom: 0;
}

.post-item-header {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  margin-bottom: 12px;
  gap: 16px;
}

.post-item-title {
  margin: 0;
  font-size: 1.05rem;
  font-weight: 700;
  letter-spacing: 0.02em;
  flex: 1;
  line-height: 1.1;
}

.post-item-title a {
  color: #000;
  text-decoration: none;
  transition: opacity 0.2s ease;
}

.post-item-title a:hover {
  opacity: 0.6;
}

.post-item-meta {
  color: #999;
  font-size: 0.75rem;
  font-weight: 400;
  letter-spacing: 0.03em;
  text-transform: uppercase;
  white-space: nowrap;
  flex-shrink: 0;
}

.post-item-excerpt {
  color: #666;
  line-height: 1.8;
  font-size: 0.95rem;
}

/* Post Detail */
.post {
  max-width: 100%;
}

.post-header {
  margin-bottom: 48px;
}

.post-title {
  margin-bottom: 16px;
  font-size: 1.8rem;
  font-weight: 700;
  letter-spacing: 0.03em;
  line-height: 1.3;
}

.post-meta {
  color: #999;
  font-size: 0.85rem;
  font-weight: 500;
  letter-spacing: 0.03em;
  text-transform: uppercase;
}

.post-author {
  margin-left: 12px;
}

.post-content {
  font-size: 1.05rem;
  line-height: 1.8;
  color: #333;
}

.post-content h1,
.post-content h2,
.post-content h3,
.post-content h4,
.post-content h5,
.post-content h6 {
  margin-top: 48px;
  margin-bottom: 20px;
  line-height: 1.3;
  font-weight: 700;
  letter-spacing: 0.02em;
  color: #000;
}

.post-content h1 { font-size: 1.6rem; }
.post-content h2 { font-size: 1.4rem; }
.post-content h3 { font-size: 1.2rem; }

.post-content p {
  margin-bottom: 24px;
}

.post-content ul,
.post-content ol {
  margin-bottom: 24px;
  padding-left: 32px;
}

.post-content li {
  margin-bottom: 8px;
}

.post-content a {
  color: #000;
  text-decoration: none;
  border-bottom: 1px solid #000;
  transition: opacity 0.2s ease;
}

.post-content a:hover {
  opacity: 0.5;
}

.post-content code {
  background-color: #f0f0f0;
  padding: 3px 8px;
  border-radius: 4px;
  font-family: 'Courier Prime', 'Courier New', monospace;
  font-size: 0.9em;
  color: #d63384;
}

.post-content pre {
  background-color: #1a1a1a;
  padding: 24px;
  border-radius: 8px;
  overflow-x: auto;
  margin-bottom: 32px;
}

.post-content pre code {
  background-color: transparent;
  padding: 0;
  color: #f8f8f2;
}

.post-content img {
  max-width: 100%;
  height: auto;
  margin: 32px 0;
  border-radius: 8px;
  filter: grayscale(100%);
  transition: filter 0.3s ease;
}

.post-content img:hover {
  filter: grayscale(0%);
}

.post-categories,
.post-model {
  margin-top: 16px;
  text-align: right;
}

.post-categories:first-of-type {
  margin-top: 48px;
}

.post-categories strong,
.post-model strong {
  font-size: 0.7rem;
  font-weight: 400;
  letter-spacing: 0.03em;
  text-transform: uppercase;
  color: #999;
}

.category {
  display: inline-block;
  background-color: #f0f0f0;
  padding: 4px 10px;
  border-radius: 4px;
  margin-left: 6px;
  font-size: 0.7rem;
  font-weight: 400;
  letter-spacing: 0.02em;
  color: #666;
  text-decoration: none;
  transition: opacity 0.2s ease;
}

.category:hover {
  opacity: 0.6;
}

.model {
  display: inline-block;
  background-color: #f0f0f0;
  padding: 4px 10px;
  border-radius: 4px;
  margin-left: 6px;
  font-size: 0.7rem;
  font-weight: 400;
  letter-spacing: 0.02em;
  color: #666;
  text-decoration: none;
  transition: opacity 0.2s ease;
}

.model:hover {
  opacity: 0.6;
}

.post-navigation {
  margin-top: 60px;
  padding-top: 32px;
  border-top: 1px solid #e0e0e0;
  display: flex;
  justify-content: space-between;
  gap: 32px;
}

.prev-post,
.next-post {
  color: #000;
  text-decoration: none;
  transition: opacity 0.2s ease;
  font-weight: 500;
}

.prev-post:hover,
.next-post:hover {
  opacity: 0.5;
}

/* Category Header */
.category-header {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  margin-bottom: 40px;
  padding-bottom: 20px;
  border-bottom: 1px solid #e0e0e0;
}

.category-title {
  font-size: 1.2rem;
  font-weight: 700;
  letter-spacing: 0.03em;
  text-transform: capitalize;
  margin: 0;
}

.back-link {
  font-size: 0.85rem;
  color: #666;
  text-decoration: none;
  transition: opacity 0.2s ease;
}

.back-link:hover {
  opacity: 0.6;
}

/* Footer Tags */
.footer-tags {
  margin-top: 60px;
  text-align: left;
}

.footer-tag-section {
  margin-bottom: 12px;
  font-size: 0.85rem;
  line-height: 1.8;
}

.footer-tag-section strong {
  font-weight: 500;
  color: #000;
  margin-right: 8px;
}

.footer-tag-link {
  color: #000;
  text-decoration: none;
  transition: opacity 0.2s ease;
  margin: 0 2px;
}

.footer-tag-link:hover {
  opacity: 0.6;
}

/* About Page */
.about-page h2 {
  font-size: 1.4rem;
  font-weight: 700;
  margin-top: 80px;
  margin-bottom: 32px;
  padding-bottom: 12px;
  border-bottom: 2px solid #000;
  letter-spacing: 0.02em;
}

.about-page h2:first-of-type {
  margin-top: 0;
}

.about-page h3 {
  font-size: 1.1rem;
  font-weight: 600;
  margin-top: 48px;
  margin-bottom: 20px;
  letter-spacing: 0.02em;
}

.about-page p {
  line-height: 2.0;
  margin-bottom: 20px;
}

.about-page ul {
  list-style: none;
  padding-left: 0;
  margin-bottom: 20px;
}

.about-page ul li {
  padding-left: 24px;
  margin-bottom: 12px;
  position: relative;
  line-height: 2.0;
}

.about-page ul li::before {
  content: "▸";
  position: absolute;
  left: 0;
  color: #000;
  font-size: 0.85em;
}

.about-page strong {
  font-weight: 600;
  color: #000;
}

.about-page a {
  color: #000;
  text-decoration: none;
  border-bottom: 1px solid #000;
  transition: opacity 0.2s ease;
}

.about-page a:hover {
  opacity: 0.5;
}

.about-page hr {
  border: none;
  border-top: 1px solid #e0e0e0;
  margin: 60px 0;
}

/* Footer */
.site-footer {
  background-color: transparent;
  padding: 60px 0 40px 0;
  border-top: 1px solid #e0e0e0;
  margin-top: 100px;
  text-align: center;
  color: #999;
  font-size: 0.85rem;
  font-weight: 500;
  letter-spacing: 0.02em;
}

/* Responsive */
@media (max-width: 768px) {
  .container {
    padding: 0 32px;
  }

  .site-header {
    padding: 40px 0 30px 0;
  }

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

  .site-content {
    padding: 40px 0;
  }

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

  .post-content h1 { font-size: 1.4rem; }
  .post-content h2 { font-size: 1.2rem; }
  .post-content h3 { font-size: 1.1rem; }

  .post-navigation {
    flex-direction: column;
    gap: 16px;
  }

  .post-item-header {
    flex-direction: column;
    align-items: flex-start;
    gap: 8px;
  }
}