:root {
  --color-bg: #f7f9f5;
  --color-surface: #ffffff;
  --color-primary: #5a8f6e;
  --color-primary-light: #8fbf9f;
  --color-accent: #7eb8c9;
  --color-text: #2c3e35;
  --color-text-muted: #5f7268;
  --color-border: #dde8df;
  --color-highlight: #eef5f0;
  --shadow-sm: 0 1px 3px rgba(44, 62, 53, 0.08);
  --shadow-md: 0 4px 16px rgba(44, 62, 53, 0.1);
  --radius: 8px;
  --font-sans: "Hiragino Kaku Gothic ProN", "Hiragino Sans", "Yu Gothic", "Meiryo", sans-serif;
  --font-serif: "Hiragino Mincho ProN", "Yu Mincho", "MS PMincho", serif;
  --max-width: 1280px;
}

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

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

body {
  font-family: var(--font-sans);
  background: var(--color-bg);
  color: var(--color-text);
  line-height: 1.7;
  min-height: 100vh;
}

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

a {
  color: var(--color-primary);
  text-decoration: none;
  transition: color 0.2s ease;
}

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

.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 20px;
}

.site-header {
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: var(--shadow-sm);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 0;
  gap: 24px;
}

.site-logo {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 2px;
  font-family: var(--font-serif);
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--color-primary);
  white-space: nowrap;
}

.site-logo span {
  color: var(--color-text-muted);
  font-size: 0.75rem;
  font-family: var(--font-sans);
  font-weight: 400;
  display: block;
  letter-spacing: 0.05em;
}

.main-nav ul {
  display: flex;
  flex-wrap: wrap;
  list-style: none;
  gap: 4px 20px;
}

.main-nav a {
  color: var(--color-text);
  font-size: 0.9rem;
  font-weight: 500;
  padding: 4px 0;
  border-bottom: 2px solid transparent;
}

.main-nav a:hover,
.main-nav a.active {
  color: var(--color-primary);
  border-bottom-color: var(--color-primary-light);
}

.hero {
  background: var(--color-surface);
  margin-bottom: 24px;
}

.hero-feature {
  position: relative;
  overflow: hidden;
  border-radius: 0 0 var(--radius) var(--radius);
}

.hero-feature img {
  width: 100%;
  height: 420px;
  object-fit: cover;
}

.hero-overlay {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  padding: 40px;
  background: linear-gradient(transparent, rgba(44, 62, 53, 0.75));
  color: #fff;
}

.hero-tag {
  display: inline-block;
  background: var(--color-primary);
  color: #fff;
  font-size: 0.75rem;
  padding: 4px 12px;
  border-radius: 20px;
  margin-bottom: 12px;
  letter-spacing: 0.08em;
}

.hero-overlay h1 {
  font-family: var(--font-serif);
  font-size: 2rem;
  line-height: 1.4;
  margin-bottom: 8px;
}

.hero-overlay p {
  font-size: 0.95rem;
  opacity: 0.92;
  max-width: 640px;
}

.layout-grid {
  display: grid;
  grid-template-columns: 240px 1fr 280px;
  gap: 24px;
  align-items: start;
  padding-bottom: 48px;
}

.sidebar-left,
.sidebar-right,
.main-content {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.panel {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
}

.panel-header {
  background: var(--color-highlight);
  padding: 12px 16px;
  border-bottom: 1px solid var(--color-border);
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--color-primary);
  letter-spacing: 0.06em;
}

.panel-body {
  padding: 16px;
}

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

.popular-list li {
  border-bottom: 1px solid var(--color-border);
  padding: 12px 0;
}

.popular-list li:last-child {
  border-bottom: none;
  padding-bottom: 0;
}

.popular-list li:first-child {
  padding-top: 0;
}

.popular-list a {
  display: flex;
  gap: 12px;
  align-items: flex-start;
  color: var(--color-text);
}

.popular-list a:hover {
  color: var(--color-primary);
}

.popular-thumb {
  width: 64px;
  height: 48px;
  object-fit: cover;
  border-radius: 4px;
  flex-shrink: 0;
}

.popular-list span {
  font-size: 0.85rem;
  line-height: 1.5;
  font-weight: 500;
}

.article-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  margin-bottom: 20px;
}

.article-card:last-child {
  margin-bottom: 0;
}

.article-card img {
  width: 100%;
  height: 280px;
  object-fit: cover;
}

.article-card-body {
  padding: 24px;
}

.article-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 16px;
  font-size: 0.8rem;
  color: var(--color-text-muted);
  margin-bottom: 12px;
}

.article-category {
  color: var(--color-primary);
  font-weight: 600;
}

.article-card h2 {
  font-family: var(--font-serif);
  font-size: 1.35rem;
  line-height: 1.5;
  margin-bottom: 12px;
  color: var(--color-text);
}

.article-card h2 a {
  color: inherit;
}

.article-card h2 a:hover {
  color: var(--color-primary);
}

.article-excerpt {
  color: var(--color-text-muted);
  font-size: 0.95rem;
  margin-bottom: 16px;
}

.read-more {
  display: inline-block;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--color-primary);
  border-bottom: 1px solid var(--color-primary-light);
  padding-bottom: 2px;
}

.content-section {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 32px;
  margin-bottom: 20px;
  box-shadow: var(--shadow-sm);
}

.content-section:last-child {
  margin-bottom: 0;
}

.section-title {
  font-family: var(--font-serif);
  font-size: 1.5rem;
  color: var(--color-primary);
  margin-bottom: 20px;
  padding-bottom: 12px;
  border-bottom: 2px solid var(--color-highlight);
}

.content-section h3 {
  font-size: 1.05rem;
  color: var(--color-text);
  margin: 20px 0 10px;
}

.content-section p,
.content-section li {
  color: var(--color-text-muted);
  font-size: 0.95rem;
  margin-bottom: 12px;
}

.content-section ul,
.content-section ol {
  padding-left: 24px;
  margin-bottom: 16px;
}

.ad-slot {
  background: var(--color-highlight);
  border: 1px dashed var(--color-border);
  border-radius: var(--radius);
  padding: 20px;
  text-align: center;
  min-height: 250px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 8px;
}

.ad-label {
  font-size: 0.7rem;
  color: var(--color-text-muted);
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.ad-slot p {
  font-size: 0.85rem;
  color: var(--color-text-muted);
}

.recommend-card {
  display: flex;
  gap: 12px;
  padding: 12px 0;
  border-bottom: 1px solid var(--color-border);
}

.recommend-card:last-child {
  border-bottom: none;
}

.recommend-card img {
  width: 80px;
  height: 60px;
  object-fit: cover;
  border-radius: 4px;
  flex-shrink: 0;
}

.recommend-card h4 {
  font-size: 0.85rem;
  line-height: 1.5;
  font-weight: 500;
}

.recommend-card h4 a {
  color: var(--color-text);
}

.recommend-card h4 a:hover {
  color: var(--color-primary);
}

.detail-gallery {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
  margin: 20px 0;
}

.detail-gallery img {
  width: 100%;
  height: 200px;
  object-fit: cover;
  border-radius: var(--radius);
}

.contact-box {
  background: var(--color-highlight);
  border-radius: var(--radius);
  padding: 20px;
  margin-top: 16px;
}

.contact-box p {
  margin-bottom: 8px;
}

.contact-email {
  font-weight: 600;
  color: var(--color-primary);
  word-break: break-all;
}

.site-footer {
  background: var(--color-text);
  color: rgba(255, 255, 255, 0.85);
  padding: 40px 0 24px;
  margin-top: 24px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: 32px;
  margin-bottom: 32px;
}

.footer-brand {
  font-family: var(--font-serif);
  font-size: 1.25rem;
  color: #fff;
  margin-bottom: 12px;
}

.site-footer p,
.site-footer li {
  font-size: 0.85rem;
  line-height: 1.8;
  color: rgba(255, 255, 255, 0.7);
}

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

.site-footer a {
  color: rgba(255, 255, 255, 0.85);
}

.site-footer a:hover {
  color: var(--color-primary-light);
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.15);
  padding-top: 20px;
  text-align: center;
  font-size: 0.8rem;
  color: rgba(255, 255, 255, 0.5);
}

.cookie-banner {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  background: var(--color-surface);
  border-top: 1px solid var(--color-border);
  padding: 16px 20px;
  box-shadow: 0 -4px 20px rgba(44, 62, 53, 0.12);
  z-index: 200;
  display: none;
}

.cookie-banner.visible {
  display: block;
}

.cookie-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.cookie-inner p {
  flex: 1;
  font-size: 0.85rem;
  color: var(--color-text-muted);
  min-width: 280px;
}

.cookie-actions {
  display: flex;
  gap: 10px;
}

.btn {
  display: inline-block;
  padding: 10px 20px;
  border-radius: var(--radius);
  font-size: 0.85rem;
  font-weight: 600;
  cursor: pointer;
  border: none;
  transition: background 0.2s ease, transform 0.1s ease;
}

.btn-primary {
  background: var(--color-primary);
  color: #fff;
}

.btn-primary:hover {
  background: #4a7a5c;
}

.btn-outline {
  background: transparent;
  border: 1px solid var(--color-border);
  color: var(--color-text-muted);
}

.btn-outline:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
}

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

  .sidebar-left {
    order: 2;
  }

  .main-content {
    order: 1;
  }

  .sidebar-right {
    order: 3;
  }

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

@media (max-width: 768px) {
  .header-inner {
    flex-direction: column;
    align-items: flex-start;
  }

  .main-nav ul {
    gap: 8px 16px;
  }

  .hero-feature img {
    height: 260px;
  }

  .hero-overlay {
    padding: 24px;
  }

  .hero-overlay h1 {
    font-size: 1.4rem;
  }

  .detail-gallery {
    grid-template-columns: 1fr;
  }

  .content-section {
    padding: 20px;
  }
}