/* ========================================
   グリーンインフラ技術集 - スタイルシート
   ======================================== */

/* CSS変数 */
:root {
  --primary-green: #2d5a27;
  --secondary-green: #4a7c42;
  --light-green: #7cb342;
  --pale-green: #c5e1a5;
  --very-pale-green: #e8f5e9;
  --accent-blue: #0288d1;
  --accent-brown: #795548;
  --text-dark: #263238;
  --text-gray: #546e7a;
  --bg-light: #fafafa;
  --white: #ffffff;
  --shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
  --shadow-hover: 0 4px 16px rgba(0, 0, 0, 0.15);
  --border-radius: 8px;
  --transition: all 0.3s ease;

  /* カテゴリ別カラー */
  --cat-planning: #C62828;
  --cat-planning-light: #FFEBEE;
  --cat-planning-pale: #FFCDD2;
  --cat-technology: #1565C0;
  --cat-technology-light: #E3F2FD;
  --cat-technology-pale: #BBDEFB;
  --cat-evaluation: #E67A3A;
  --cat-evaluation-light: #FFF3E0;
  --cat-evaluation-pale: #FFE0B2;
  --cat-funding: #26C6C6;
  --cat-funding-light: #E0F7FA;
  --cat-funding-pale: #B2EBF2;
}

/* リセット */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: 'Noto Sans JP', 'Hiragino Kaku Gothic ProN', 'Hiragino Sans', Meiryo, sans-serif;
  line-height: 1.8;
  color: var(--text-dark);
  background-color: var(--bg-light);
}

a {
  color: var(--primary-green);
  text-decoration: none;
  transition: var(--transition);
}

a:hover {
  color: var(--light-green);
}

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

/* ========================================
   ヘッダー
   ======================================== */
.header {
  background: linear-gradient(135deg, var(--primary-green) 0%, var(--secondary-green) 100%);
  color: var(--white);
  padding: 0;
  position: sticky;
  top: 0;
  z-index: 1000;
  box-shadow: var(--shadow);
}

.header-inner {
  max-width: 1400px;
  margin: 0 auto;
  padding: 1rem 2rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.logo {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.logo-icon {
  font-size: 2rem;
}

.logo-img {
  height: 40px;
  width: auto;
}

.logo-text {
  font-size: 1.25rem;
  font-weight: 700;
  letter-spacing: 0.05em;
}

.logo-text a {
  color: var(--white);
}

.logo-text a:hover {
  color: var(--pale-green);
}

.nav-menu {
  display: flex;
  list-style: none;
  gap: 0.5rem;
}

.nav-menu a {
  color: var(--white);
  padding: 0.5rem 1rem;
  border-radius: var(--border-radius);
  font-size: 0.95rem;
  font-weight: 500;
  transition: var(--transition);
}

.nav-menu a:hover,
.nav-menu a.active {
  background-color: rgba(255, 255, 255, 0.2);
  color: var(--white);
}

/* モバイルメニュー */
.mobile-menu-btn {
  display: none;
  background: none;
  border: none;
  color: var(--white);
  font-size: 1.5rem;
  cursor: pointer;
}

/* ========================================
   ヒーローセクション
   ======================================== */
.hero {
  background: linear-gradient(135deg, #5a9a52 0%, #6db365 50%, #8bc879 100%);
  color: var(--white);
  padding: 5rem 2rem;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 100 100'%3E%3Cpath d='M50 10 C30 30, 20 50, 50 70 C80 50, 70 30, 50 10' fill='rgba(255,255,255,0.05)'/%3E%3C/svg%3E") repeat;
  background-size: 100px;
  opacity: 0.3;
}

.hero-content {
  position: relative;
  max-width: 900px;
  margin: 0 auto;
}

.hero-title {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.75rem;
  font-size: 2.5rem;
  font-weight: 700;
  margin-bottom: 1rem;
  text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.2);
}

.hero-logo {
  width: 60px;
  height: auto;
}

.hero h1 {
  font-size: 2.5rem;
  font-weight: 700;
  margin-bottom: 1rem;
  text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.2);
}

.hero-subtitle {
  font-size: 1.25rem;
  margin-bottom: 2rem;
  opacity: 0.95;
}

.hero-description {
  font-size: 1rem;
  max-width: 700px;
  margin: 0 auto 2rem;
  opacity: 0.9;
  line-height: 2;
}

.hero-badge {
  display: inline-block;
  background-color: rgba(255, 255, 255, 0.2);
  padding: 0.5rem 1.5rem;
  border-radius: 50px;
  font-size: 0.9rem;
  margin-top: 1rem;
}

/* ========================================
   セクション共通
   ======================================== */
.section {
  padding: 4rem 2rem;
  max-width: 1400px;
  margin: 0 auto;
}

.section-title {
  font-size: 1.75rem;
  font-weight: 700;
  color: var(--primary-green);
  margin-bottom: 2rem;
  text-align: center;
  position: relative;
  padding-bottom: 1rem;
}

.section-title::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 60px;
  height: 3px;
  background: linear-gradient(90deg, var(--light-green), var(--primary-green));
  border-radius: 2px;
}

/* ========================================
   カテゴリカード
   ======================================== */
.category-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 2rem;
  margin-top: 2rem;
}

.category-card {
  background: var(--white);
  border-radius: var(--border-radius);
  padding: 2rem;
  box-shadow: var(--shadow);
  transition: var(--transition);
  border-left: 4px solid var(--light-green);
  display: flex;
  flex-direction: column;
}

.category-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-hover);
}

.category-icon {
  font-size: 2.5rem;
  margin-bottom: 1rem;
}

.category-card h3 {
  font-size: 1.9rem;
  color: var(--primary-green);
  margin-bottom: 0.75rem;
  font-weight: 700;
}

.category-card p {
  color: var(--text-gray);
  font-size: 0.95rem;
  flex-grow: 1;
  margin-bottom: 1rem;
}

.category-meta {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: 1rem;
  border-top: 1px solid var(--very-pale-green);
}

.category-pages {
  font-size: 0.85rem;
  color: var(--text-gray);
}

.category-link {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  color: var(--primary-green);
  font-weight: 500;
  font-size: 0.95rem;
}

.category-link:hover {
  color: var(--light-green);
}

/* カテゴリカード塗りつぶしスタイル */
.category-card.cat-planning {
  background: var(--cat-planning);
  border-left: none;
  border-radius: 16px;
}
.category-card.cat-planning h3,
.category-card.cat-planning p,
.category-card.cat-planning .category-pages,
.category-card.cat-planning .category-link {
  color: var(--white);
}
.category-card.cat-planning .category-meta {
  border-top-color: rgba(255,255,255,0.3);
}
.category-card.cat-planning .category-link:hover {
  opacity: 0.8;
}

.category-card.cat-technology {
  background: var(--cat-technology);
  border-left: none;
  border-radius: 16px;
}
.category-card.cat-technology h3,
.category-card.cat-technology p,
.category-card.cat-technology .category-pages,
.category-card.cat-technology .category-link {
  color: var(--white);
}
.category-card.cat-technology .category-meta {
  border-top-color: rgba(255,255,255,0.3);
}
.category-card.cat-technology .category-link:hover {
  opacity: 0.8;
}

.category-card.cat-evaluation {
  background: var(--cat-evaluation);
  border-left: none;
  border-radius: 16px;
}
.category-card.cat-evaluation h3,
.category-card.cat-evaluation p,
.category-card.cat-evaluation .category-pages,
.category-card.cat-evaluation .category-link {
  color: var(--white);
}
.category-card.cat-evaluation .category-meta {
  border-top-color: rgba(255,255,255,0.3);
}
.category-card.cat-evaluation .category-link:hover {
  opacity: 0.8;
}

.category-card.cat-funding {
  background: var(--cat-funding);
  border-left: none;
  border-radius: 16px;
}
.category-card.cat-funding h3,
.category-card.cat-funding p,
.category-card.cat-funding .category-pages,
.category-card.cat-funding .category-link {
  color: var(--white);
}
.category-card.cat-funding .category-meta {
  border-top-color: rgba(255,255,255,0.3);
}
.category-card.cat-funding .category-link:hover {
  opacity: 0.8;
}

/* ========================================
   カテゴリページ
   ======================================== */
.page-header {
  background: linear-gradient(135deg, var(--primary-green) 0%, var(--secondary-green) 100%);
  color: var(--white);
  padding: 1rem 2rem;
}

.page-header-inner {
  max-width: 1600px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  gap: 2rem;
}

.page-header h1 {
  font-size: 1.5rem;
  margin: 0;
  white-space: nowrap;
}

.page-header p {
  opacity: 0.9;
  margin: 0;
  font-size: 0.9rem;
  line-height: 1.6;
}

.category-content {
  display: grid;
  grid-template-columns: 350px 1fr;
  gap: 2rem;
  max-width: 1600px;
  margin: 0 auto;
  padding: 2rem;
  min-height: calc(100vh - 200px);
}

/* 技術一覧サイドバー */
.tech-list-panel {
  background: var(--white);
  border-radius: var(--border-radius);
  box-shadow: var(--shadow);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  max-height: calc(100vh - 250px);
  position: sticky;
  top: 100px;
}

.tech-list-header {
  background: var(--very-pale-green);
  padding: 1rem 1.25rem;
  border-bottom: 1px solid var(--pale-green);
}

.tech-list-header h2 {
  font-size: 1rem;
  color: var(--primary-green);
  margin-bottom: 0.5rem;
}

.tech-search {
  width: 100%;
  padding: 0.5rem 0.75rem;
  border: 1px solid var(--pale-green);
  border-radius: 4px;
  font-size: 0.9rem;
}

.tech-search:focus {
  outline: none;
  border-color: var(--light-green);
  box-shadow: 0 0 0 2px rgba(124, 179, 66, 0.2);
}

/* フィルタセクション */
.filter-section {
  padding: 0.75rem 1rem;
  border-bottom: 1px solid var(--pale-green);
  background: var(--very-pale-green);
}

.filter-group {
  margin-bottom: 0.75rem;
}

.filter-group:last-of-type {
  margin-bottom: 0.5rem;
}

.filter-group-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  cursor: pointer;
  padding: 0.25rem 0;
}

.filter-group-title {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--primary-green);
  margin: 0;
}

.filter-toggle {
  background: none;
  border: none;
  cursor: pointer;
  font-size: 0.75rem;
  color: var(--text-gray);
  padding: 0.25rem;
  transition: var(--transition);
}

.filter-toggle:hover {
  color: var(--primary-green);
}

.filter-options {
  display: flex;
  flex-wrap: wrap;
  gap: 0.25rem 0.5rem;
  padding: 0.5rem 0 0.25rem;
}

.filter-options.collapsed {
  display: none;
}

.filter-options label {
  display: flex;
  align-items: center;
  gap: 0.25rem;
  font-size: 0.8rem;
  color: var(--text-dark);
  cursor: pointer;
  padding: 0.15rem 0.35rem;
  border-radius: 3px;
  transition: var(--transition);
  white-space: nowrap;
}

.filter-options label:hover {
  background-color: var(--very-pale-green);
}

.filter-options input[type="checkbox"] {
  width: 14px;
  height: 14px;
  accent-color: var(--primary-green);
  cursor: pointer;
}

.filter-clear-btn {
  display: block;
  width: 100%;
  padding: 0.4rem;
  margin-top: 0.5rem;
  background: var(--very-pale-green);
  border: 1px solid var(--pale-green);
  border-radius: 4px;
  font-size: 0.8rem;
  color: var(--text-gray);
  cursor: pointer;
  transition: var(--transition);
}

.filter-clear-btn:hover {
  background: var(--pale-green);
  color: var(--primary-green);
}

.filter-count {
  font-size: 0.75rem;
  color: var(--text-gray);
  margin-top: 0.5rem;
  text-align: center;
}

.tech-list {
  list-style: none;
  overflow-y: auto;
  flex-grow: 1;
}

.tech-list-item {
  border-bottom: 1px solid var(--very-pale-green);
}

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

.tech-list-btn {
  display: block;
  width: 100%;
  padding: 0.875rem 1.25rem;
  background: none;
  border: none;
  text-align: left;
  cursor: pointer;
  transition: var(--transition);
  font-size: 0.9rem;
  color: var(--text-dark);
}

.tech-list-btn:hover {
  background-color: var(--very-pale-green);
}

.tech-list-btn.active {
  background-color: var(--pale-green);
  color: var(--primary-green);
  font-weight: 600;
}

.tech-list-btn .page-num {
  display: inline-block;
  min-width: 2.5rem;
  color: var(--text-gray);
  font-size: 0.8rem;
}

/* PDF表示エリア */
.pdf-viewer-panel {
  background: var(--white);
  border-radius: var(--border-radius);
  box-shadow: var(--shadow);
  overflow: hidden;
  display: flex;
  flex-direction: column;
}

.pdf-viewer-header {
  background: var(--very-pale-green);
  padding: 1rem 1.5rem;
  border-bottom: 1px solid var(--pale-green);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.pdf-viewer-header h3 {
  font-size: 1rem;
  color: var(--primary-green);
}

.pdf-controls {
  display: flex;
  gap: 0.5rem;
}

.pdf-controls button {
  background: var(--white);
  border: 1px solid var(--pale-green);
  padding: 0.4rem 0.75rem;
  border-radius: 4px;
  cursor: pointer;
  font-size: 0.85rem;
  transition: var(--transition);
}

.pdf-controls button:hover {
  background: var(--primary-green);
  color: var(--white);
  border-color: var(--primary-green);
}

.pdf-container {
  flex-grow: 1;
  min-height: 600px;
}

.pdf-container iframe {
  width: 100%;
  height: 100%;
  min-height: 600px;
  border: none;
}

.pdf-placeholder {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  height: 100%;
  min-height: 600px;
  color: var(--text-gray);
  text-align: center;
  padding: 2rem;
}

.pdf-placeholder-icon {
  font-size: 4rem;
  margin-bottom: 1rem;
  opacity: 0.5;
}

/* ========================================
   概要セクション
   ======================================== */
.about-content {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 2rem;
}

.about-card {
  background: var(--white);
  padding: 2rem;
  border-radius: var(--border-radius);
  box-shadow: var(--shadow);
}

.about-card h3 {
  color: var(--primary-green);
  margin-bottom: 1rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.about-card p {
  color: var(--text-gray);
  font-size: 0.95rem;
}

/* ========================================
   フッター
   ======================================== */
.footer {
  background: var(--text-dark);
  color: var(--white);
  padding: 3rem 2rem 1.5rem;
  margin-top: 4rem;
}

.footer-content {
  max-width: 1400px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 2rem;
}

.footer-section h4 {
  font-size: 1rem;
  margin-bottom: 1rem;
  color: var(--pale-green);
}

.footer-section p,
.footer-section a {
  font-size: 0.9rem;
  color: rgba(255, 255, 255, 0.8);
  line-height: 2;
}

.footer-section a:hover {
  color: var(--pale-green);
}

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

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

.footer-bottom {
  max-width: 1400px;
  margin: 2rem auto 0;
  padding-top: 1.5rem;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  text-align: center;
  font-size: 0.85rem;
  color: rgba(255, 255, 255, 0.6);
}

/* ========================================
   レスポンシブ
   ======================================== */
@media (max-width: 1024px) {
  .category-content {
    grid-template-columns: 1fr;
  }

  .tech-list-panel {
    max-height: none;
    position: static;
  }
}

@media (max-width: 768px) {
  .header-inner {
    padding: 0.75rem 1rem;
  }

  .nav-menu {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--primary-green);
    flex-direction: column;
    padding: 1rem;
    gap: 0;
  }

  .nav-menu.active {
    display: flex;
  }

  .nav-menu a {
    padding: 0.75rem 1rem;
    border-radius: 0;
  }

  .mobile-menu-btn {
    display: block;
  }

  .hero {
    padding: 3rem 1.5rem;
  }

  .hero h1 {
    font-size: 1.75rem;
  }

  .hero-subtitle {
    font-size: 1rem;
  }

  .section {
    padding: 2.5rem 1rem;
  }

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

  .category-grid {
    gap: 1rem;
  }

  .category-card {
    padding: 1.5rem;
  }

  .pdf-container {
    min-height: 400px;
  }

  .pdf-container iframe {
    min-height: 400px;
  }
}

/* ========================================
   ユーティリティ
   ======================================== */
.text-center {
  text-align: center;
}

.mt-1 { margin-top: 0.5rem; }
.mt-2 { margin-top: 1rem; }
.mt-3 { margin-top: 1.5rem; }
.mt-4 { margin-top: 2rem; }

.mb-1 { margin-bottom: 0.5rem; }
.mb-2 { margin-bottom: 1rem; }
.mb-3 { margin-bottom: 1.5rem; }
.mb-4 { margin-bottom: 2rem; }

/* ========================================
   案3: 上部フィルタバー + 下部2カラム
   ======================================== */

/* フィルタバー */
.filter-bar {
  background: var(--white);
  border-bottom: 1px solid var(--pale-green);
  padding: 0.75rem 2rem;
  position: sticky;
  top: 60px;
  z-index: 100;
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.05);
}

.filter-bar-inner {
  max-width: 1600px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  gap: 1rem;
  flex-wrap: wrap;
}

.filter-search {
  flex: 0 0 350px;
}

.filter-bar .tech-search {
  width: 100%;
  padding: 0.5rem 0.75rem;
  border: 1px solid var(--pale-green);
  border-radius: 4px;
  font-size: 0.9rem;
}

.filter-bar .tech-search:focus {
  outline: none;
  border-color: var(--light-green);
  box-shadow: 0 0 0 2px rgba(124, 179, 66, 0.2);
}

.filter-dropdowns {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  flex: 1;
}

/* ドロップダウンフィルタ */
.filter-dropdown {
  position: relative;
}

.filter-dropdown-btn {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.5rem 1rem;
  background: var(--very-pale-green);
  border: 1px solid var(--pale-green);
  border-radius: 4px;
  cursor: pointer;
  font-size: 0.9rem;
  color: var(--text-dark);
  transition: var(--transition);
  white-space: nowrap;
  min-width: 120px;
}

.filter-dropdown-btn:hover {
  background: var(--pale-green);
  border-color: var(--light-green);
}

.filter-dropdown.active .filter-dropdown-btn {
  background: var(--pale-green);
  border-color: var(--primary-green);
}

.filter-dropdown-label {
  font-weight: 500;
}

.filter-dropdown-count {
  display: none;
  background: var(--primary-green);
  color: var(--white);
  font-size: 0.7rem;
  padding: 0.1rem 0.4rem;
  border-radius: 10px;
  min-width: 1.2rem;
  text-align: center;
}

.filter-dropdown-count.show {
  display: inline-block;
}

.filter-dropdown-arrow {
  font-size: 0.7rem;
  color: var(--text-gray);
  transition: transform 0.2s ease;
}

.filter-dropdown.open .filter-dropdown-arrow {
  transform: rotate(180deg);
}

.filter-dropdown-menu {
  position: absolute;
  top: 100%;
  left: 0;
  margin-top: 0.25rem;
  background: var(--white);
  border: 1px solid var(--pale-green);
  border-radius: 4px;
  box-shadow: var(--shadow-hover);
  padding: 0.5rem;
  min-width: 180px;
  max-height: 300px;
  overflow-y: auto;
  z-index: 200;
  display: none;
}

.filter-dropdown.open .filter-dropdown-menu {
  display: block;
}

.filter-dropdown-menu label {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.4rem 0.5rem;
  font-size: 0.85rem;
  color: var(--text-dark);
  cursor: pointer;
  border-radius: 3px;
  transition: var(--transition);
}

.filter-dropdown-menu label:hover {
  background-color: var(--very-pale-green);
}

.filter-dropdown-menu input[type="checkbox"] {
  width: 16px;
  height: 16px;
  accent-color: var(--primary-green);
  cursor: pointer;
}

.filter-bar .filter-clear-btn {
  padding: 0.3rem 0.4rem;
  background: transparent;
  border: 1px solid var(--text-gray);
  border-radius: 3px;
  font-size: 0.75rem;
  color: var(--text-gray);
  cursor: pointer;
  transition: var(--transition);
}

.filter-bar .filter-clear-btn:hover {
  background: var(--text-gray);
  color: var(--white);
}

.filter-result-count {
  margin-left: auto;
  font-size: 0.9rem;
  color: var(--text-gray);
}

.filter-result-count span {
  font-weight: 600;
  color: var(--primary-green);
}

/* 案3用のメインコンテンツ */
.category-content-v3 {
  display: grid;
  grid-template-columns: 320px 1fr;
  gap: 1.5rem;
  max-width: 1600px;
  margin: 0 auto;
  padding: 1.5rem 2rem;
  min-height: calc(100vh - 250px);
}

/* 案3用の技術一覧パネル */
.tech-list-panel-v3 {
  background: var(--white);
  border-radius: var(--border-radius);
  box-shadow: var(--shadow);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  height: calc(100vh - 220px);
  position: sticky;
  top: 130px;
}

.tech-list-header-v3 {
  background: var(--very-pale-green);
  padding: 0.75rem 1rem;
  border-bottom: 1px solid var(--pale-green);
}

.tech-list-header-v3 h2 {
  font-size: 0.95rem;
  color: var(--primary-green);
  margin: 0;
}

.tech-list-panel-v3 .tech-list {
  list-style: none;
  overflow-y: auto;
  flex-grow: 1;
  margin: 0;
  padding: 0;
}

/* 案3用のPDF表示エリア */
.pdf-viewer-panel-v3 {
  background: var(--white);
  border-radius: var(--border-radius);
  box-shadow: var(--shadow);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  height: calc(100vh - 220px);
}

.pdf-viewer-header-v3 {
  background: var(--very-pale-green);
  padding: 0.75rem 1rem;
  border-bottom: 1px solid var(--pale-green);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.pdf-viewer-header-v3 h3 {
  font-size: 0.95rem;
  color: var(--primary-green);
  margin: 0;
}

.pdf-container-v3 {
  flex-grow: 1;
  height: calc(100vh - 280px);
}

.pdf-container-v3 iframe {
  width: 100%;
  height: 100%;
  border: none;
}

.pdf-container-v3 .pdf-placeholder {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  height: 100%;
  color: var(--text-gray);
  text-align: center;
  padding: 2rem;
}

/* レスポンシブ対応 */
@media (max-width: 1024px) {
  .filter-bar {
    padding: 0.75rem 1rem;
  }

  .filter-bar-inner {
    flex-direction: column;
    align-items: stretch;
    gap: 0.75rem;
  }

  .filter-search {
    flex: 1 1 100%;
  }

  .filter-dropdowns {
    flex-wrap: wrap;
  }

  .filter-result-count {
    margin-left: 0;
    text-align: center;
  }

  .category-content-v3 {
    grid-template-columns: 1fr;
    padding: 1rem;
  }

  .tech-list-panel-v3,
  .pdf-viewer-panel-v3 {
    height: auto;
    max-height: 500px;
    position: static;
  }

  .pdf-container-v3 {
    height: 500px;
  }
}

@media (max-width: 768px) {
  .filter-bar {
    top: 50px;
  }

  .filter-dropdown-menu {
    position: fixed;
    left: 1rem;
    right: 1rem;
    top: auto;
    bottom: 0;
    max-height: 50vh;
    border-radius: 8px 8px 0 0;
  }
}

/* ========================================
   カテゴリページ別配色
   ======================================== */

/* 推進・計画設計 - 赤系統 */
.page-planning .page-header {
  background: var(--cat-planning);
}
.page-planning .tech-list-header-v3 {
  background: var(--cat-planning-light);
  border-bottom-color: var(--cat-planning-pale);
}
.page-planning .tech-list-header-v3 h2 {
  color: var(--cat-planning);
}
.page-planning .tech-list-btn.active {
  background-color: var(--cat-planning-pale);
  color: var(--cat-planning);
}
.page-planning .tech-list-btn:hover {
  background-color: var(--cat-planning-light);
}
.page-planning .pdf-viewer-header-v3 {
  background: var(--cat-planning-light);
  border-bottom-color: var(--cat-planning-pale);
}
.page-planning .pdf-viewer-header-v3 h3 {
  color: var(--cat-planning);
}
.page-planning .filter-bar {
  background: var(--cat-planning-light);
  border-bottom-color: var(--cat-planning-pale);
}
.page-planning .tech-search:focus {
  border-color: var(--cat-planning);
  box-shadow: 0 0 0 2px rgba(198, 40, 40, 0.2);
}
.page-planning .filter-dropdown-btn {
  background: var(--white);
  border-color: var(--cat-planning-pale);
}
.page-planning .filter-dropdown-btn:hover {
  background: var(--cat-planning-light);
  border-color: var(--cat-planning);
}
.page-planning .filter-dropdown.active .filter-dropdown-btn {
  background: var(--cat-planning-pale);
  border-color: var(--cat-planning);
}
.page-planning .filter-dropdown-count {
  background: var(--cat-planning);
}
.page-planning .filter-dropdown-menu input[type="checkbox"] {
  accent-color: var(--cat-planning);
}
.page-planning .filter-result-count span {
  color: var(--cat-planning);
}

/* 要素技術 - 青系統 */
.page-technology .page-header {
  background: var(--cat-technology);
}
.page-technology .tech-list-header-v3 {
  background: var(--cat-technology-light);
  border-bottom-color: var(--cat-technology-pale);
}
.page-technology .tech-list-header-v3 h2 {
  color: var(--cat-technology);
}
.page-technology .tech-list-btn.active {
  background-color: var(--cat-technology-pale);
  color: var(--cat-technology);
}
.page-technology .tech-list-btn:hover {
  background-color: var(--cat-technology-light);
}
.page-technology .pdf-viewer-header-v3 {
  background: var(--cat-technology-light);
  border-bottom-color: var(--cat-technology-pale);
}
.page-technology .pdf-viewer-header-v3 h3 {
  color: var(--cat-technology);
}
.page-technology .filter-bar {
  background: var(--cat-technology-light);
  border-bottom-color: var(--cat-technology-pale);
}
.page-technology .tech-search:focus {
  border-color: var(--cat-technology);
  box-shadow: 0 0 0 2px rgba(21, 101, 192, 0.2);
}
.page-technology .filter-dropdown-btn {
  background: var(--white);
  border-color: var(--cat-technology-pale);
}
.page-technology .filter-dropdown-btn:hover {
  background: var(--cat-technology-light);
  border-color: var(--cat-technology);
}
.page-technology .filter-dropdown.active .filter-dropdown-btn {
  background: var(--cat-technology-pale);
  border-color: var(--cat-technology);
}
.page-technology .filter-dropdown-count {
  background: var(--cat-technology);
}
.page-technology .filter-dropdown-menu input[type="checkbox"] {
  accent-color: var(--cat-technology);
}
.page-technology .filter-result-count span {
  color: var(--cat-technology);
}

/* 評価手法 - オレンジ系統 */
.page-evaluation .page-header {
  background: var(--cat-evaluation);
}
.page-evaluation .tech-list-header-v3 {
  background: var(--cat-evaluation-light);
  border-bottom-color: var(--cat-evaluation-pale);
}
.page-evaluation .tech-list-header-v3 h2 {
  color: var(--cat-evaluation);
}
.page-evaluation .tech-list-btn.active {
  background-color: var(--cat-evaluation-pale);
  color: var(--cat-evaluation);
}
.page-evaluation .tech-list-btn:hover {
  background-color: var(--cat-evaluation-light);
}
.page-evaluation .pdf-viewer-header-v3 {
  background: var(--cat-evaluation-light);
  border-bottom-color: var(--cat-evaluation-pale);
}
.page-evaluation .pdf-viewer-header-v3 h3 {
  color: var(--cat-evaluation);
}
.page-evaluation .filter-bar {
  background: var(--cat-evaluation-light);
  border-bottom-color: var(--cat-evaluation-pale);
}
.page-evaluation .tech-search:focus {
  border-color: var(--cat-evaluation);
  box-shadow: 0 0 0 2px rgba(230, 122, 58, 0.2);
}
.page-evaluation .filter-dropdown-btn {
  background: var(--white);
  border-color: var(--cat-evaluation-pale);
}
.page-evaluation .filter-dropdown-btn:hover {
  background: var(--cat-evaluation-light);
  border-color: var(--cat-evaluation);
}
.page-evaluation .filter-dropdown.active .filter-dropdown-btn {
  background: var(--cat-evaluation-pale);
  border-color: var(--cat-evaluation);
}
.page-evaluation .filter-dropdown-count {
  background: var(--cat-evaluation);
}
.page-evaluation .filter-dropdown-menu input[type="checkbox"] {
  accent-color: var(--cat-evaluation);
}
.page-evaluation .filter-result-count span {
  color: var(--cat-evaluation);
}

/* 資金調達 - シアン系統 */
.page-funding .page-header {
  background: var(--cat-funding);
}
.page-funding .tech-list-header-v3 {
  background: var(--cat-funding-light);
  border-bottom-color: var(--cat-funding-pale);
}
.page-funding .tech-list-header-v3 h2 {
  color: var(--cat-funding);
}
.page-funding .tech-list-btn.active {
  background-color: var(--cat-funding-pale);
  color: var(--cat-funding);
}
.page-funding .tech-list-btn:hover {
  background-color: var(--cat-funding-light);
}
.page-funding .pdf-viewer-header-v3 {
  background: var(--cat-funding-light);
  border-bottom-color: var(--cat-funding-pale);
}
.page-funding .pdf-viewer-header-v3 h3 {
  color: var(--cat-funding);
}
.page-funding .filter-bar {
  background: var(--cat-funding-light);
  border-bottom-color: var(--cat-funding-pale);
}
.page-funding .tech-search:focus {
  border-color: var(--cat-funding);
  box-shadow: 0 0 0 2px rgba(38, 198, 198, 0.2);
}
.page-funding .filter-dropdown-btn {
  background: var(--white);
  border-color: var(--cat-funding-pale);
}
.page-funding .filter-dropdown-btn:hover {
  background: var(--cat-funding-light);
  border-color: var(--cat-funding);
}
.page-funding .filter-dropdown.active .filter-dropdown-btn {
  background: var(--cat-funding-pale);
  border-color: var(--cat-funding);
}
.page-funding .filter-dropdown-count {
  background: var(--cat-funding);
}
.page-funding .filter-dropdown-menu input[type="checkbox"] {
  accent-color: var(--cat-funding);
}
.page-funding .filter-result-count span {
  color: var(--cat-funding);
}

/* ========================================
   グリーンインフラとは セクション
   ======================================== */
.gi-about-section {
  background: var(--white);
}

.section-subtitle {
  text-align: center;
  color: var(--text-gray);
  font-size: 1rem;
  margin-top: -1rem;
  margin-bottom: 2rem;
}

/* 3つのカテゴリカード（防災・減災、環境保全、地域振興） */
.gi-category-cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
  margin-bottom: 2.5rem;
}

.gi-category-card {
  background: var(--white);
  border: 1px solid #e0e0e0;
  border-radius: var(--border-radius);
  padding: 1.25rem;
  border-top: 4px solid;
}

.gi-category-card h3 {
  font-size: 1rem;
  font-weight: 700;
  margin-bottom: 0.5rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.gi-cat-icon {
  font-size: 1.2rem;
}

.gi-category-card p {
  font-size: 0.85rem;
  color: var(--text-gray);
  line-height: 1.6;
}

.gi-cat-disaster {
  border-top-color: #1565C0;
}

.gi-cat-disaster h3 {
  color: #1565C0;
}

.gi-cat-environment {
  border-top-color: #2E7D32;
}

.gi-cat-environment h3 {
  color: #2E7D32;
}

.gi-cat-regional {
  border-top-color: #C62828;
}

.gi-cat-regional h3 {
  color: #C62828;
}

/* 8つの説明カード */
.gi-description-cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
}

.gi-desc-card {
  background: var(--white);
  border: 1px solid #e0e0e0;
  border-radius: var(--border-radius);
  padding: 1.25rem;
}

.gi-desc-card h4 {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--primary-green);
  margin-bottom: 0.5rem;
  border-bottom: 2px solid var(--pale-green);
  padding-bottom: 0.5rem;
}

.gi-desc-card p {
  font-size: 0.85rem;
  color: var(--text-gray);
  line-height: 1.6;
}

/* レスポンシブ対応 */
@media (max-width: 1024px) {
  .gi-category-cards {
    grid-template-columns: repeat(3, 1fr);
  }
  .gi-description-cards {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 768px) {
  .gi-category-cards {
    grid-template-columns: 1fr;
  }
  .gi-description-cards {
    grid-template-columns: 1fr;
  }
}