/* ===============================
   CSS Variables
=============================== */
:root {
  --site-header-h: 0px; /* JSから上書きされる */
}

/* ===============================
   Single News Page Styles
=============================== */
.single-news-main {
  width: 100%;
  min-height: 100vh;
  padding-top: calc(var(--site-header-h) + 24px);
  padding-right: 20px;
  padding-left: 20px;
  padding-bottom: 80px;
  background-color: #fff;
}

@media (max-width: 768px) {
  .single-news-main {
    padding-right: 16px;
    padding-left: 16px;
    padding-bottom: 60px;
  }
}

@media (max-width: 480px) {
  .single-news-main {
    padding-right: 16px;
    padding-left: 16px;
    padding-bottom: 40px;
  }
}

.single-news-container {
  max-width: 800px;
  margin: 0 auto;
}

.single-news-article {
  width: 100%;
}

/* ===============================
   Header
=============================== */
.single-news-header {
  margin-bottom: 40px;
  padding-bottom: 24px;
  border-bottom: 1px solid #e0e0e0;
}

@media (max-width: 768px) {
  .single-news-header {
    margin-bottom: 32px;
    padding-bottom: 20px;
  }
}

@media (max-width: 480px) {
  .single-news-header {
    margin-bottom: 24px;
    padding-bottom: 16px;
  }
}

.single-news-category {
  display: inline-block;
  font-size: 0.85rem;
  font-weight: 600;
  color: #fff;
  white-space: nowrap;
  padding: 6px 14px;
  background: #22c468;
  border-radius: 4px;
  margin-bottom: 16px;
}

@media (max-width: 768px) {
  .single-news-category {
    font-size: 0.8rem;
    padding: 5px 12px;
    margin-bottom: 12px;
  }
}

@media (max-width: 480px) {
  .single-news-category {
    font-size: 0.75rem;
    padding: 4px 10px;
    margin-bottom: 10px;
  }
}

.single-news-title {
  font-size: 2rem;
  font-weight: 600;
  line-height: 1.5;
  color: #111;
  margin: 0 0 16px 0;
}

@media (max-width: 768px) {
  .single-news-title {
    font-size: 1.75rem;
    margin-bottom: 12px;
  }
}

@media (max-width: 480px) {
  .single-news-title {
    font-size: 1.5rem;
    margin-bottom: 10px;
  }
}

.single-news-date {
  display: block;
  font-size: 0.9rem;
  color: #666;
  margin-top: 8px;
}

@media (max-width: 768px) {
  .single-news-date {
    font-size: 0.85rem;
  }
}

@media (max-width: 480px) {
  .single-news-date {
    font-size: 0.8rem;
  }
}

/* ===============================
   Content
=============================== */
.single-news-content {
  font-size: 1rem;
  line-height: 1.8;
  color: #111;
  margin-bottom: 40px;
}

@media (max-width: 768px) {
  .single-news-content {
    font-size: 0.95rem;
    margin-bottom: 32px;
  }
}

@media (max-width: 480px) {
  .single-news-content {
    font-size: 0.9rem;
    margin-bottom: 24px;
  }
}

.single-news-content p {
  margin-bottom: 1.5em;
  text-align: left;
}

.single-news-content h2 {
  font-size: 1.5rem;
  font-weight: 600;
  margin: 2em 0 1em;
  color: #111;
  border-bottom: 2px solid #22c468;
  padding-bottom: 8px;
}

@media (max-width: 768px) {
  .single-news-content h2 {
    font-size: 1.35rem;
  }
}

@media (max-width: 480px) {
  .single-news-content h2 {
    font-size: 1.2rem;
  }
}

.single-news-content h3 {
  font-size: 1.25rem;
  font-weight: 600;
  margin: 1.5em 0 0.75em;
  color: #111;
}

@media (max-width: 768px) {
  .single-news-content h3 {
    font-size: 1.15rem;
  }
}

@media (max-width: 480px) {
  .single-news-content h3 {
    font-size: 1.1rem;
  }
}

.single-news-content img {
  max-width: 100%;
  height: auto;
  margin: 1.5em 0;
  border-radius: 4px;
}

.single-news-content a {
  color: #22c468;
  text-decoration: underline;
  transition: color 0.2s ease;
}

.single-news-content a:hover {
  color: #1aa855;
}

.single-news-content ul,
.single-news-content ol {
  margin: 1.5em 0;
  padding-left: 2em;
}

.single-news-content li {
  margin-bottom: 0.5em;
}

.single-news-content blockquote {
  border-left: 4px solid #22c468;
  padding-left: 1.5em;
  margin: 1.5em 0;
  color: #666;
  font-style: italic;
}

/* ===============================
   Footer (in-article)
=============================== */
.single-news-footer {
  margin-top: 60px;
  padding-top: 24px;
  border-top: 1px solid #e0e0e0;
}

@media (max-width: 768px) {
  .single-news-footer {
    margin-top: 40px;
    padding-top: 20px;
  }
}

@media (max-width: 480px) {
  .single-news-footer {
    margin-top: 32px;
    padding-top: 16px;
  }
}

.single-news-navigation {
  text-align: center;
}

.single-news-back-link {
  display: inline-block;
  padding: 12px 24px;
  background-color: #22c468;
  color: #fff;
  text-decoration: none;
  border-radius: 4px;
  font-size: 0.95rem;
  font-weight: 500;
  transition: background-color 0.3s ease, transform 0.2s ease;
}

.single-news-back-link:hover {
  background-color: #1aa855;
  color: #fff;
  transform: translateY(-2px);
}

.single-news-back-link:active {
  transform: translateY(0);
}

@media (max-width: 768px) {
  .single-news-back-link {
    padding: 10px 20px;
    font-size: 0.9rem;
  }
}

@media (max-width: 480px) {
  .single-news-back-link {
    padding: 8px 16px;
    font-size: 0.85rem;
  }
}

/* ===============================
   Empty
=============================== */
.single-news-empty {
  text-align: center;
  padding: 60px 20px;
  color: #666;
}

.single-news-empty p {
  font-size: 1rem;
  margin: 0;
}