/* ==========================================================================
   CSS Stylesheet: 小さなコミュニティの境界線ガイド
   Responsive, Modern & Clean Minimalist Design
   Max Width: 1000px
   ========================================================================== */

:root {
  --color-primary: #1e3a5f;
  --color-primary-light: #2b4c7e;
  --color-accent: #0f766e;
  --color-accent-light: #e6f4f2;
  --color-accent-warm: #d97706;
  --color-text-main: #334155;
  --color-text-muted: #64748b;
  --color-text-light: #94a3b8;
  --color-bg-base: #f8fafc;
  --color-bg-card: #ffffff;
  --color-bg-subtle: #f1f5f9;
  --color-border: #e2e8f0;
  --color-border-hover: #cbd5e1;
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.07), 0 2px 4px -2px rgba(0, 0, 0, 0.05);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.08), 0 4px 6px -4px rgba(0, 0, 0, 0.04);
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --font-base: -apple-system, BlinkMacSystemFont, "Segoe UI", "Hiragino Kaku Gothic ProN", "BIZ UDPGothic", Meiryo, sans-serif;
  --font-heading: -apple-system, BlinkMacSystemFont, "Segoe UI", "Hiragino Sans", "Hiragino Kaku Gothic ProN", sans-serif;
  --max-width: 1000px;
  --line-height: 1.8;
}

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

body {
  font-family: var(--font-base);
  color: var(--color-text-main);
  background-color: var(--color-bg-base);
  line-height: var(--line-height);
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

a:hover {
  color: var(--color-primary);
  text-decoration: underline;
}

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

/* Layout Container */
.container {
  max-width: var(--max-width);
  margin-left: auto;
  margin-right: auto;
  padding-left: 20px;
  padding-right: 20px;
}

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

.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 16px;
  padding-bottom: 16px;
}

.site-branding {
  display: flex;
  flex-direction: column;
}

.site-title {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--color-primary);
  line-height: 1.3;
}

.site-title a {
  color: var(--color-primary);
  text-decoration: none;
}

.site-tagline {
  font-size: 0.8rem;
  color: var(--color-text-muted);
  margin-top: 2px;
}

.main-nav {
  display: flex;
  gap: 20px;
  align-items: center;
}

.nav-links {
  display: flex;
  list-style: none;
  gap: 18px;
  flex-wrap: wrap;
}

.nav-links a {
  font-size: 0.925rem;
  font-weight: 500;
  color: var(--color-text-main);
  padding: 6px 10px;
  border-radius: var(--radius-sm);
  transition: all 0.2s ease;
}

.nav-links a:hover,
.nav-links a.active {
  color: var(--color-accent);
  background-color: var(--color-accent-light);
  text-decoration: none;
}

/* Breadcrumb */
.breadcrumb {
  margin: 16px 0;
  font-size: 0.85rem;
  color: var(--color-text-muted);
}

.breadcrumb ol {
  display: flex;
  flex-wrap: wrap;
  list-style: none;
  gap: 8px;
  align-items: center;
}

.breadcrumb li+li::before {
  content: "/";
  margin-right: 8px;
  color: var(--color-text-light);
}

.breadcrumb a {
  color: var(--color-text-muted);
}

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

/* Page Layout */
.site-main {
  padding-top: 24px;
  padding-bottom: 56px;
}

.layout-single {
  display: block;
}

/* Article & Content Styling */
.article-container {
  background-color: var(--color-bg-card);
  border-radius: var(--radius-lg);
  padding: 40px;
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--color-border);
}

.article-header {
  margin-bottom: 32px;
  border-bottom: 1px solid var(--color-border);
  padding-bottom: 24px;
}

.article-category {
  display: inline-block;
  background-color: var(--color-accent-light);
  color: var(--color-accent);
  font-size: 0.825rem;
  font-weight: 600;
  padding: 4px 12px;
  border-radius: 9999px;
  margin-bottom: 12px;
  letter-spacing: 0.02em;
}

.article-title {
  font-size: 1.85rem;
  line-height: 1.4;
  color: var(--color-primary);
  font-family: var(--font-heading);
  font-weight: 700;
  margin-bottom: 16px;
}

.article-lead {
  font-size: 1.05rem;
  line-height: 1.8;
  color: var(--color-text-muted);
  background-color: var(--color-bg-subtle);
  padding: 18px 24px;
  border-left: 4px solid var(--color-accent);
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  margin-top: 20px;
}

/* Eye Catch Image */
.eyecatch-wrapper {
  margin-bottom: 36px;
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-md);
  border: 1px solid var(--color-border);
  background-color: #ffffff;
}

.eyecatch-image {
  width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  display: block;
}

.eyecatch-caption {
  font-size: 0.8rem;
  color: var(--color-text-light);
  padding: 8px 16px;
  text-align: right;
  background-color: var(--color-bg-card);
  border-top: 1px solid var(--color-border);
}

/* Table of Contents */
.toc-box {
  background-color: var(--color-bg-subtle);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 24px;
  margin: 32px 0 40px;
}

.toc-title {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: 12px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.toc-title::before {
  content: "";
  display: inline-block;
  width: 4px;
  height: 18px;
  background-color: var(--color-accent);
  border-radius: 2px;
}

.toc-list {
  list-style: none;
  counter-reset: toc-counter;
}

.toc-list li {
  margin-bottom: 8px;
  counter-increment: toc-counter;
}

.toc-list li a {
  color: var(--color-text-main);
  font-size: 0.95rem;
  line-height: 1.5;
  display: inline-block;
}

.toc-list li a:hover {
  color: var(--color-accent);
}

.toc-list li a::before {
  content: counter(toc-counter) ". ";
  font-weight: 600;
  color: var(--color-accent);
  margin-right: 4px;
}

.toc-list ul {
  list-style: none;
  padding-left: 20px;
  margin-top: 6px;
}

.toc-list ul li {
  margin-bottom: 6px;
}

.toc-list ul li a {
  font-size: 0.9rem;
  color: var(--color-text-muted);
}

.toc-list ul li a::before {
  content: "・";
  color: var(--color-text-light);
}

/* Typography Inside Content */
.article-body h2 {
  font-size: 1.45rem;
  color: var(--color-primary);
  margin-top: 48px;
  margin-bottom: 20px;
  padding: 12px 18px;
  background: linear-gradient(90deg, var(--color-bg-subtle) 0%, rgba(241, 245, 249, 0) 100%);
  border-left: 5px solid var(--color-primary);
  border-radius: var(--radius-sm);
  line-height: 1.4;
}

.article-body h3 {
  font-size: 1.25rem;
  color: var(--color-primary-light);
  margin-top: 36px;
  margin-bottom: 16px;
  padding-bottom: 8px;
  border-bottom: 2px solid var(--color-border);
  line-height: 1.4;
}

.article-body h4 {
  font-size: 1.1rem;
  color: var(--color-text-main);
  margin-top: 24px;
  margin-bottom: 12px;
  font-weight: 600;
}

.article-body p {
  margin-bottom: 22px;
  font-size: 1rem;
  line-height: 1.85;
}

.article-body strong {
  font-weight: 700;
  color: var(--color-primary);
  background: linear-gradient(transparent 65%, #fef08a 65%);
}

.article-body ul, 
.article-body ol {
  margin: 20px 0 24px 24px;
}

.article-body li {
  margin-bottom: 8px;
  line-height: 1.75;
}

/* Special Content Boxes */
.card-box {
  background-color: var(--color-bg-base);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 24px;
  margin: 32px 0;
}

.highlight-box {
  background-color: var(--color-accent-light);
  border-left: 4px solid var(--color-accent);
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  padding: 20px 24px;
  margin: 28px 0;
}

.highlight-box-title {
  font-weight: 700;
  color: var(--color-accent);
  margin-bottom: 8px;
  font-size: 1.05rem;
}

/* Comparison Boxes (NG vs OK) */
.comparison-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
  margin: 32px 0;
}

.compare-col {
  padding: 20px;
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border);
}

.compare-col.ng {
  background-color: #fff5f5;
  border-color: #fed7d7;
}

.compare-col.ok {
  background-color: #f0fdf4;
  border-color: #bbf7d0;
}

.compare-label {
  font-size: 0.9rem;
  font-weight: 700;
  display: inline-block;
  padding: 4px 10px;
  border-radius: var(--radius-sm);
  margin-bottom: 12px;
}

.compare-col.ng .compare-label {
  background-color: #fee2e2;
  color: #991b1b;
}

.compare-col.ok .compare-label {
  background-color: #dcfce7;
  color: #166534;
}

/* Dialogue Phrase Box */
.phrase-card {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 20px 24px;
  margin: 20px 0;
  box-shadow: var(--shadow-sm);
}

.phrase-card .phrase-tag {
  font-size: 0.8rem;
  color: var(--color-accent);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 6px;
}

.phrase-card .phrase-quote {
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--color-primary);
  margin-bottom: 10px;
  padding-left: 12px;
  border-left: 3px solid var(--color-accent);
}

.phrase-card .phrase-desc {
  font-size: 0.925rem;
  color: var(--color-text-muted);
  line-height: 1.7;
  margin-bottom: 0;
}

/* Hero Section on Top Page */
.hero-section {
  background: linear-gradient(135deg, #1e3a5f 0%, #0f766e 100%);
  color: #ffffff;
  border-radius: var(--radius-lg);
  padding: 48px 40px;
  margin-bottom: 40px;
  box-shadow: var(--shadow-md);
  position: relative;
  overflow: hidden;
}

.hero-content {
  position: relative;
  z-index: 2;
  max-width: 680px;
}

.hero-subtitle {
  font-size: 0.95rem;
  font-weight: 600;
  color: #99f6e4;
  letter-spacing: 0.05em;
  margin-bottom: 12px;
}

.hero-title {
  font-size: 2.1rem;
  font-weight: 800;
  line-height: 1.35;
  margin-bottom: 18px;
  font-family: var(--font-heading);
}

.hero-desc {
  font-size: 1.05rem;
  line-height: 1.8;
  color: #e2e8f0;
  margin-bottom: 24px;
}

.hero-eyecatch {
  margin-top: 24px;
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
  border: 2px solid rgba(255, 255, 255, 0.2);
}

/* Article Card Grid */
.section-header {
  margin-bottom: 24px;
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
}

.section-title {
  font-size: 1.45rem;
  font-weight: 700;
  color: var(--color-primary);
  border-left: 4px solid var(--color-accent);
  padding-left: 12px;
}

.card-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
  margin-bottom: 48px;
}

.article-card {
  background-color: var(--color-bg-card);
  border-radius: var(--radius-md);
  overflow: hidden;
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow-sm);
  transition: transform 0.2s ease, box-shadow 0.2s ease;
  display: flex;
  flex-direction: column;
}

.article-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-md);
  border-color: var(--color-border-hover);
}

.card-image-box {
  width: 100%;
  aspect-ratio: 16 / 9;
  background-color: #f1f5f9;
  overflow: hidden;
}

.card-image-box img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.3s ease;
}

.article-card:hover .card-image-box img {
  transform: scale(1.03);
}

.card-body {
  padding: 24px;
  display: flex;
  flex-direction: column;
  flex-grow: 1;
}

.card-tag {
  font-size: 0.75rem;
  color: var(--color-accent);
  font-weight: 600;
  margin-bottom: 8px;
}

.card-title {
  font-size: 1.15rem;
  font-weight: 700;
  line-height: 1.45;
  margin-bottom: 12px;
  color: var(--color-primary);
}

.card-title a {
  color: inherit;
  text-decoration: none;
}

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

.card-text {
  font-size: 0.9rem;
  color: var(--color-text-muted);
  line-height: 1.65;
  margin-bottom: 16px;
  flex-grow: 1;
}

.card-footer {
  margin-top: auto;
  padding-top: 12px;
  border-top: 1px solid var(--color-border);
}

.read-more {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--color-accent);
  display: inline-flex;
  align-items: center;
  gap: 4px;
}

.read-more:hover {
  text-decoration: underline;
}

/* Call to Action & Sub Pages */
.contact-btn-wrapper {
  margin: 36px 0;
  text-align: center;
}

.btn-primary {
  display: inline-block;
  background: linear-gradient(135deg, var(--color-accent) 0%, var(--color-primary) 100%);
  color: #ffffff;
  font-weight: 700;
  font-size: 1.05rem;
  padding: 16px 36px;
  border-radius: var(--radius-md);
  text-decoration: none;
  box-shadow: var(--shadow-md);
  transition: transform 0.2s ease, box-shadow 0.2s ease, opacity 0.2s ease;
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
  opacity: 0.95;
  color: #ffffff;
  text-decoration: none;
}

/* About / Policy Table */
.info-table {
  width: 100%;
  border-collapse: collapse;
  margin: 24px 0;
}

.info-table th,
.info-table td {
  padding: 14px 18px;
  border: 1px solid var(--color-border);
  font-size: 0.95rem;
}

.info-table th {
  width: 25%;
  background-color: var(--color-bg-subtle);
  font-weight: 600;
  color: var(--color-primary);
  text-align: left;
}

.info-table td {
  background-color: var(--color-bg-card);
}

/* Site Footer */
.site-footer {
  background-color: var(--color-bg-card);
  border-top: 1px solid var(--color-border);
  padding: 48px 0 28px;
  margin-top: 60px;
}

.footer-content {
  display: grid;
  grid-template-columns: 2fr 1fr;
  gap: 40px;
  margin-bottom: 36px;
}

.footer-title {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: 8px;
}

.footer-desc {
  font-size: 0.85rem;
  color: var(--color-text-muted);
  line-height: 1.6;
}

.footer-nav-title {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--color-primary);
  margin-bottom: 12px;
}

.footer-nav-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.footer-nav-list a {
  font-size: 0.85rem;
  color: var(--color-text-muted);
  text-decoration: none;
}

.footer-nav-list a:hover {
  color: var(--color-accent);
}

.footer-disclaimer-box {
  background-color: var(--color-bg-subtle);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  padding: 12px 18px;
  font-size: 0.8rem;
  color: var(--color-text-muted);
  line-height: 1.6;
  margin-bottom: 24px;
}

.footer-copyright {
  text-align: center;
  font-size: 0.8rem;
  color: var(--color-text-light);
  padding-top: 16px;
  border-top: 1px solid var(--color-border);
}

/* Responsive Media Queries */
@media (max-width: 820px) {
  .site-header .container {
    flex-direction: column;
    align-items: flex-start;
    gap: 12px;
  }

  .main-nav {
    width: 100%;
    overflow-x: auto;
    padding-bottom: 4px;
  }

  .nav-links {
    gap: 8px;
  }

  .nav-links a {
    font-size: 0.85rem;
    padding: 6px 8px;
    white-space: nowrap;
  }

  .card-grid {
    grid-template-columns: 1fr;
    gap: 20px;
  }

  .comparison-grid {
    grid-template-columns: 1fr;
    gap: 16px;
  }

  .footer-content {
    grid-template-columns: 1fr;
    gap: 28px;
  }

  .article-container {
    padding: 24px 18px;
  }

  .hero-section {
    padding: 32px 20px;
  }

  .hero-title {
    font-size: 1.6rem;
  }

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

  .info-table th {
    width: 32%;
  }
}