/*
 * Sagebase - Editorial Monochrome Design System
 * 政治的中立性を保つため、完全モノクローム配色を採用
 */

/* ============================================
   1. Design Tokens
   ============================================ */

:root {
  /* Monochrome Palette */
  --color-black: #000000;
  --color-gray-950: #0a0a0a;
  --color-gray-900: #171717;
  --color-gray-800: #262626;
  --color-gray-700: #404040;
  --color-gray-600: #525252;
  --color-gray-500: #737373;
  --color-gray-400: #a3a3a3;
  --color-gray-300: #d4d4d4;
  --color-gray-200: #e5e5e5;
  --color-gray-100: #f5f5f5;
  --color-gray-50: #fafafa;
  --color-white: #ffffff;

  /* Semantic Colors */
  --color-text: var(--color-gray-900);
  --color-text-secondary: var(--color-gray-600);
  --color-text-muted: var(--color-gray-500);
  --color-bg: var(--color-white);
  --color-bg-alt: var(--color-gray-50);
  --color-bg-dark: var(--color-gray-900);
  --color-border: var(--color-gray-200);
  --color-border-strong: var(--color-gray-900);

  /* Typography */
  --font-display: 'Noto Sans JP', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-body: 'Noto Serif JP', Georgia, serif;
  --font-mono: 'SF Mono', Monaco, monospace;

  /* Font Sizes - Fluid Typography */
  --text-xs: clamp(0.75rem, 0.7rem + 0.25vw, 0.875rem);
  --text-sm: clamp(0.875rem, 0.8rem + 0.375vw, 1rem);
  --text-base: clamp(1rem, 0.9rem + 0.5vw, 1.125rem);
  --text-lg: clamp(1.125rem, 1rem + 0.625vw, 1.25rem);
  --text-xl: clamp(1.25rem, 1.1rem + 0.75vw, 1.5rem);
  --text-2xl: clamp(1.5rem, 1.25rem + 1.25vw, 2rem);
  --text-3xl: clamp(2rem, 1.5rem + 2.5vw, 3rem);
  --text-4xl: clamp(2.5rem, 1.75rem + 3.75vw, 4rem);
  --text-5xl: clamp(3rem, 2rem + 5vw, 5rem);

  /* Spacing */
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.25rem;
  --space-6: 1.5rem;
  --space-8: 2rem;
  --space-10: 2.5rem;
  --space-12: 3rem;
  --space-16: 4rem;
  --space-20: 5rem;
  --space-24: 6rem;
  --space-32: 8rem;

  /* Layout */
  --container-max: 1200px;
  --container-narrow: 720px;

  /* Animation */
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
  --ease-in-out: cubic-bezier(0.65, 0, 0.35, 1);
  --duration-fast: 150ms;
  --duration-base: 300ms;
  --duration-slow: 500ms;
}

/* Dark Mode */
@media (prefers-color-scheme: dark) {
  :root {
    --color-text: var(--color-gray-100);
    --color-text-secondary: var(--color-gray-400);
    --color-text-muted: var(--color-gray-500);
    --color-bg: var(--color-gray-950);
    --color-bg-alt: var(--color-gray-900);
    --color-bg-dark: var(--color-gray-100);
    --color-border: var(--color-gray-800);
    --color-border-strong: var(--color-gray-100);
  }
}

/* ============================================
   2. Reset & Base
   ============================================ */

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-body);
  font-size: var(--text-base);
  line-height: 1.7;
  color: var(--color-text);
  background-color: var(--color-bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* ============================================
   3. Typography
   ============================================ */

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-display);
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: -0.02em;
}

p {
  margin-bottom: var(--space-6);
}

a {
  color: inherit;
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 2px;
  transition: opacity var(--duration-fast) var(--ease-out);
}

a:hover {
  opacity: 0.6;
}

strong {
  font-weight: 700;
}

.lead-text {
  font-size: var(--text-xl);
  line-height: 1.6;
}

/* ============================================
   4. Layout
   ============================================ */

.container {
  width: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--space-6);
}

.container-narrow {
  max-width: var(--container-narrow);
}

.section {
  padding: var(--space-24) 0;
}

@media (max-width: 768px) {
  .section {
    padding: var(--space-16) 0;
  }
}

/* ============================================
   5. Header
   ============================================ */

.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  background: var(--color-bg);
  border-bottom: 1px solid var(--color-border);
}

.nav-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: var(--space-4) var(--space-6);
}

.logo {
  font-family: var(--font-display);
  font-size: var(--text-xl);
  font-weight: 900;
  text-decoration: none;
  letter-spacing: -0.03em;
}

.logo:hover {
  opacity: 1;
}

.nav-links {
  display: flex;
  gap: var(--space-8);
}

.nav-link {
  font-family: var(--font-display);
  font-size: var(--text-sm);
  font-weight: 500;
  text-decoration: none;
  color: var(--color-text-secondary);
  transition: color var(--duration-fast) var(--ease-out);
}

.nav-link:hover,
.nav-link.active {
  color: var(--color-text);
  opacity: 1;
}

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: var(--space-2);
}

.nav-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--color-text);
  transition: all var(--duration-base) var(--ease-out);
}

@media (max-width: 768px) {
  .nav-toggle {
    display: flex;
  }

  .nav-links {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    flex-direction: column;
    gap: 0;
    background: var(--color-bg);
    border-bottom: 1px solid var(--color-border);
    transform: translateY(-100%);
    opacity: 0;
    visibility: hidden;
    transition: all var(--duration-base) var(--ease-out);
  }

  .nav-links.active {
    transform: translateY(0);
    opacity: 1;
    visibility: visible;
  }

  .nav-link {
    display: block;
    padding: var(--space-4) var(--space-6);
    border-top: 1px solid var(--color-border);
  }

  .nav-toggle.active span:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
  }

  .nav-toggle.active span:nth-child(2) {
    opacity: 0;
  }

  .nav-toggle.active span:nth-child(3) {
    transform: rotate(-45deg) translate(5px, -5px);
  }
}

/* ============================================
   6. Hero Section
   ============================================ */

.hero {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: var(--space-32) var(--space-6) var(--space-16);
  border-bottom: 1px solid var(--color-border);
}

.hero-content {
  max-width: var(--container-max);
  margin: 0 auto;
  text-align: center;
}

.hero-badge {
  display: inline-block;
  font-family: var(--font-display);
  font-size: var(--text-xs);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--color-text-secondary);
  padding: var(--space-2) var(--space-4);
  border: 1px solid var(--color-border);
  margin-bottom: var(--space-8);
}

.hero-title {
  font-size: var(--text-5xl);
  font-weight: 900;
  line-height: 1.1;
  margin-bottom: var(--space-8);
}

.hero-title-line {
  display: block;
}

.hero-title-emphasis {
  position: relative;
}

.hero-title-emphasis::after {
  content: '';
  position: absolute;
  left: 0;
  bottom: 0.1em;
  width: 100%;
  height: 0.15em;
  background: var(--color-text);
  opacity: 0.15;
}

.hero-description {
  font-size: var(--text-lg);
  color: var(--color-text-secondary);
  max-width: 640px;
  margin: 0 auto var(--space-10);
  line-height: 1.8;
}

.hide-mobile {
  display: inline;
}

@media (max-width: 768px) {
  .hide-mobile {
    display: none;
  }
}

.hero-cta {
  display: flex;
  gap: var(--space-4);
  justify-content: center;
  flex-wrap: wrap;
}

.hero-visual {
  max-width: var(--container-max);
  margin: var(--space-16) auto 0;
}

.hero-stats-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-8);
  padding: var(--space-8) 0;
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
}

@media (max-width: 640px) {
  .hero-stats-grid {
    grid-template-columns: 1fr;
    gap: var(--space-6);
  }
}

.hero-stat {
  text-align: center;
}

.hero-stat-number {
  display: block;
  font-family: var(--font-display);
  font-size: var(--text-4xl);
  font-weight: 900;
  line-height: 1;
  margin-bottom: var(--space-2);
}

.hero-stat-label {
  font-family: var(--font-display);
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

/* ============================================
   7. Section Styles
   ============================================ */

.section-header {
  margin-bottom: var(--space-12);
}

.section-number {
  display: block;
  font-family: var(--font-display);
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--color-text-muted);
  margin-bottom: var(--space-4);
}

.section-title {
  font-size: var(--text-3xl);
  position: relative;
  display: inline-block;
}

.section-title::after {
  content: '';
  position: absolute;
  left: 0;
  bottom: -0.25em;
  width: 2em;
  height: 3px;
  background: var(--color-text);
}

/* Section Lead Text */
.section-lead {
  font-size: var(--text-lg);
  color: var(--color-text-secondary);
  max-width: 720px;
  margin-bottom: var(--space-10);
}

/* Solution Summary */
.solution-summary {
  margin-top: var(--space-10);
  padding: var(--space-8);
  background: var(--color-bg-alt);
  border-left: 3px solid var(--color-border-strong);
}

.solution-summary p {
  font-size: var(--text-lg);
  margin-bottom: 0;
}

/* Challenges Section */
.section-challenges {
  border-bottom: 1px solid var(--color-border);
}

/* Overview Section */
.section-overview {
  background: var(--color-bg-alt);
}

.overview-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-16);
  align-items: center;
}

@media (max-width: 768px) {
  .overview-content {
    grid-template-columns: 1fr;
    gap: var(--space-8);
  }
}

.data-flow {
  display: flex;
  justify-content: center;
  gap: var(--space-2);
}

.data-flow-item {
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.data-flow-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 80px;
  height: 80px;
  font-family: var(--font-display);
  font-size: var(--text-sm);
  font-weight: 600;
  border: 2px solid var(--color-border-strong);
}

.data-flow-arrow {
  width: 24px;
  height: 2px;
  background: var(--color-text);
  position: relative;
}

.data-flow-arrow::after {
  content: '';
  position: absolute;
  right: 0;
  top: 50%;
  transform: translateY(-50%) rotate(45deg);
  width: 8px;
  height: 8px;
  border-top: 2px solid var(--color-text);
  border-right: 2px solid var(--color-text);
}

@media (max-width: 640px) {
  .data-flow {
    flex-direction: column;
    align-items: center;
  }

  .data-flow-item {
    flex-direction: column;
  }

  .data-flow-arrow {
    width: 2px;
    height: 24px;
  }

  .data-flow-arrow::after {
    top: auto;
    bottom: 0;
    right: 50%;
    transform: translateX(50%) rotate(135deg);
  }
}

/* Features Section */
.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-8);
}

@media (max-width: 1024px) {
  .features-grid {
    grid-template-columns: 1fr;
    gap: var(--space-6);
  }
}

.feature-card {
  padding: var(--space-8);
  border: 1px solid var(--color-border);
  transition: border-color var(--duration-base) var(--ease-out);
}

.feature-card:hover {
  border-color: var(--color-border-strong);
}

.feature-number {
  font-family: var(--font-display);
  font-size: var(--text-xs);
  font-weight: 700;
  color: var(--color-text-muted);
  margin-bottom: var(--space-4);
}

.feature-title {
  font-size: var(--text-xl);
  margin-bottom: var(--space-4);
}

.feature-description {
  color: var(--color-text-secondary);
  margin-bottom: var(--space-6);
}

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

.feature-list li {
  position: relative;
  padding-left: var(--space-5);
  margin-bottom: var(--space-2);
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
}

.feature-list li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0.6em;
  width: 8px;
  height: 1px;
  background: var(--color-text);
}

/* Data Section */
.section-data {
  background: var(--color-bg-alt);
}

.data-cards {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-8);
}

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

.data-card {
  padding: var(--space-8);
  border: 1px solid var(--color-border);
  background: var(--color-bg);
}

.data-card-header {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  margin-bottom: var(--space-6);
}

.data-card-status {
  font-family: var(--font-display);
  font-size: var(--text-xs);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  padding: var(--space-1) var(--space-3);
  background: #4a4a4a;
  color: var(--color-bg);
}

.data-card-status.status-partial {
  background: #8a8a8a;
}

.data-card-status.status-upcoming {
  background: #b8b8b8;
}

.data-card-title {
  font-size: var(--text-2xl);
}

.data-card-description {
  color: var(--color-text-secondary);
  margin-bottom: var(--space-6);
}

.data-card-details {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  padding-top: var(--space-6);
  border-top: 1px solid var(--color-border);
}

.data-detail {
  display: flex;
  justify-content: space-between;
  font-size: var(--text-sm);
}

.data-detail-label {
  color: var(--color-text-secondary);
}

.data-detail-value {
  font-weight: 500;
}

/* Usecases Section */
.usecase-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-6);
}

@media (max-width: 1024px) {
  .usecase-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 640px) {
  .usecase-grid {
    grid-template-columns: 1fr;
  }
}

.usecase-item {
  padding: var(--space-6);
  border-top: 2px solid var(--color-border-strong);
}

.usecase-title {
  font-family: var(--font-display);
  font-size: var(--text-lg);
  font-weight: 700;
  margin-bottom: var(--space-3);
}

.usecase-item p {
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
  margin-bottom: 0;
}

/* CTA Section */
.section-cta {
  background: var(--color-bg-dark);
  color: var(--color-bg);
}

.section-cta .cta-content {
  text-align: center;
  max-width: 640px;
  margin: 0 auto;
}

.cta-title {
  font-size: var(--text-3xl);
  margin-bottom: var(--space-4);
}

.cta-description {
  font-size: var(--text-lg);
  opacity: 0.8;
  margin-bottom: var(--space-8);
}

.cta-buttons {
  display: flex;
  gap: var(--space-4);
  justify-content: center;
  flex-wrap: wrap;
}

/* ============================================
   8. Buttons
   ============================================ */

.btn {
  display: inline-block;
  font-family: var(--font-display);
  font-size: var(--text-sm);
  font-weight: 600;
  text-decoration: none;
  padding: var(--space-4) var(--space-6);
  transition: all var(--duration-base) var(--ease-out);
  cursor: pointer;
  border: none;
}

.btn-primary {
  background: var(--color-text);
  color: var(--color-bg);
}

.btn-primary:hover {
  opacity: 0.8;
}

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

.btn-secondary:hover {
  background: var(--color-text);
  color: var(--color-bg);
  opacity: 1;
}

.btn-tertiary {
  background: transparent;
  color: var(--color-bg);
  border: 1px solid currentColor;
}

.btn-tertiary:hover {
  background: var(--color-bg);
  color: var(--color-bg-dark);
  opacity: 1;
}

.section-cta .btn-primary {
  background: var(--color-bg);
  color: var(--color-bg-dark);
}

.section-cta .btn-secondary {
  color: var(--color-bg);
  border-color: var(--color-bg);
}

.section-cta .btn-secondary:hover {
  background: var(--color-bg);
  color: var(--color-bg-dark);
}

/* ============================================
   9. Footer
   ============================================ */

.site-footer {
  background: var(--color-bg-alt);
  border-top: 1px solid var(--color-border);
  padding: var(--space-16) 0 var(--space-8);
}

.footer-container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--space-6);
}

.footer-brand {
  margin-bottom: var(--space-8);
}

.footer-logo {
  font-family: var(--font-display);
  font-size: var(--text-2xl);
  font-weight: 900;
  letter-spacing: -0.03em;
  margin-bottom: var(--space-2);
}

.footer-tagline {
  color: var(--color-text-secondary);
  font-size: var(--text-sm);
  margin-bottom: 0;
}

.footer-links {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: var(--space-8);
  margin-bottom: var(--space-12);
  padding-bottom: var(--space-8);
  border-bottom: 1px solid var(--color-border);
}

.footer-section h4 {
  font-family: var(--font-display);
  font-size: var(--text-sm);
  font-weight: 600;
  margin-bottom: var(--space-4);
}

.footer-section a {
  display: block;
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
  text-decoration: none;
  margin-bottom: var(--space-2);
}

.footer-section a:hover {
  color: var(--color-text);
  opacity: 1;
}

.footer-bottom {
  text-align: center;
}

.footer-bottom p {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  margin-bottom: 0;
}

/* ============================================
   10. Page Styles
   ============================================ */

.page {
  padding-top: calc(60px + var(--space-16));
}

.page-header {
  padding: var(--space-16) 0;
  border-bottom: 1px solid var(--color-border);
  margin-bottom: var(--space-12);
}

.page-title {
  font-size: var(--text-4xl);
  margin-bottom: var(--space-4);
}

.page-description {
  font-size: var(--text-lg);
  color: var(--color-text-secondary);
  margin-bottom: 0;
}

.page-content h2 {
  font-size: var(--text-2xl);
  margin-top: var(--space-12);
  margin-bottom: var(--space-6);
  padding-top: var(--space-8);
  border-top: 1px solid var(--color-border);
}

.page-content h3 {
  font-size: var(--text-xl);
  margin-top: var(--space-8);
  margin-bottom: var(--space-4);
}

.page-content h4 {
  font-size: var(--text-lg);
  margin-top: var(--space-6);
  margin-bottom: var(--space-3);
}

.page-content ul, .page-content ol {
  margin-bottom: var(--space-6);
  padding-left: var(--space-6);
}

.page-content li {
  margin-bottom: var(--space-2);
}

.page-content blockquote {
  border-left: 3px solid var(--color-border-strong);
  padding-left: var(--space-6);
  margin: var(--space-8) 0;
  font-style: italic;
  color: var(--color-text-secondary);
}

.page-content code {
  font-family: var(--font-mono);
  font-size: 0.9em;
  background: var(--color-bg-alt);
  padding: 0.15em 0.4em;
  border-radius: 2px;
}

.page-content pre {
  background: var(--color-bg-alt);
  padding: var(--space-6);
  overflow-x: auto;
  margin-bottom: var(--space-6);
}

.page-content pre code {
  background: none;
  padding: 0;
}

/* ============================================
   11. Animations
   ============================================ */


/* ============================================
   12. Accessibility
   ============================================ */

.skip-link {
  position: absolute;
  top: -100%;
  left: 50%;
  transform: translateX(-50%);
  background: var(--color-text);
  color: var(--color-bg);
  padding: var(--space-3) var(--space-6);
  font-family: var(--font-display);
  font-size: var(--text-sm);
  text-decoration: none;
  z-index: 1000;
  transition: top var(--duration-fast) var(--ease-out);
}

.skip-link:focus {
  top: var(--space-4);
}

*:focus {
  outline: 2px solid var(--color-text);
  outline-offset: 2px;
}


/* ============================================
   12.5. Navigation Cards (全ページ共通)
   ============================================ */

.nav-cards {
  margin: 0 0 var(--space-8);
}

.nav-cards-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: var(--space-4);
}

.nav-card {
  display: block;
  padding: var(--space-4) var(--space-5);
  border: 1px solid var(--color-border);
  text-align: left;
  text-decoration: none;
  transition: border-color var(--duration-base) var(--ease-out);
}

.nav-card:hover {
  border-color: var(--color-border-strong);
  opacity: 1;
}

.nav-card-number {
  display: block;
  font-family: var(--font-display);
  font-size: 0.7rem;
  font-weight: 700;
  color: var(--color-text-muted);
  margin-bottom: var(--space-2);
}

.nav-card-title {
  font-family: var(--font-display);
  font-size: var(--text-sm);
  font-weight: 700;
  margin-bottom: var(--space-1);
}

.nav-card-desc {
  font-size: 0.75rem;
  color: var(--color-text-secondary);
  margin-bottom: 0;
  line-height: 1.4;
}

.nav-card:nth-child(2) { transition-delay: 50ms; }
.nav-card:nth-child(3) { transition-delay: 100ms; }
.nav-card:nth-child(4) { transition-delay: 150ms; }
.nav-card:nth-child(5) { transition-delay: 200ms; }

@media (max-width: 1024px) {
  .nav-cards-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

@media (max-width: 640px) {
  .nav-cards-grid {
    grid-template-columns: 1fr 1fr;
  }
}

/* ============================================
   13. Data Structure Page
   ============================================ */

/* Hero */
.ds-hero {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: var(--space-32) var(--space-6) var(--space-16);
  border-bottom: 1px solid var(--color-border);
}

.ds-hero-content {
  max-width: var(--container-max);
  margin: 0 auto;
  text-align: center;
}

.ds-hero-cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-4);
  max-width: var(--container-max);
  margin: var(--space-8) auto 0;
}

.ds-hero-card {
  padding: var(--space-4) var(--space-5);
  border: 1px solid var(--color-border);
  text-align: left;
  transition: border-color var(--duration-base) var(--ease-out);
}

.ds-hero-card:hover {
  border-color: var(--color-border-strong);
}

.ds-hero-card:nth-child(2) { transition-delay: 100ms; }
.ds-hero-card:nth-child(3) { transition-delay: 200ms; }

.ds-hero-card-number {
  display: block;
  font-family: var(--font-display);
  font-size: 0.7rem;
  font-weight: 700;
  color: var(--color-text-muted);
  margin-bottom: var(--space-2);
}

.ds-hero-card-title {
  font-family: var(--font-display);
  font-size: var(--text-sm);
  font-weight: 700;
  margin-bottom: var(--space-1);
}

.ds-hero-card-desc {
  font-size: 0.75rem;
  color: var(--color-text-secondary);
  margin-bottom: var(--space-2);
  line-height: 1.4;
}

.ds-hero-card-link {
  font-family: var(--font-display);
  font-size: var(--text-sm);
  font-weight: 600;
  text-decoration: none;
  border-bottom: 1px solid var(--color-text);
}

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

/* Section Variants */
.ds-section-alt {
  background: var(--color-bg-alt);
}

/* Hierarchy Diagram (Section 02) */
.ds-hierarchy {
  max-width: 800px;
}

.ds-hierarchy-level {
  position: relative;
}

.ds-level-2 { padding-left: var(--space-8); }
.ds-level-3 { padding-left: var(--space-8); }
.ds-level-4 { padding-left: var(--space-8); }

.ds-hierarchy-node {
  border: 1px solid var(--color-border);
  background: var(--color-bg);
  margin-bottom: 0;
}

.ds-node-header {
  font-family: var(--font-display);
  font-size: var(--text-sm);
  font-weight: 700;
  padding: var(--space-3) var(--space-6);
  background: var(--color-text);
  color: var(--color-bg);
}

.ds-node-body {
  padding: var(--space-4) var(--space-6);
}

.ds-node-example {
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
  margin-bottom: var(--space-3);
  font-style: italic;
}

.ds-node-fields {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
}

.ds-field {
  font-family: var(--font-display);
  font-size: var(--text-xs);
  font-weight: 500;
  padding: var(--space-1) var(--space-3);
  border: 1px solid var(--color-border);
  background: var(--color-bg-alt);
}

.ds-hierarchy-connector {
  width: 1px;
  height: var(--space-6);
  background: var(--color-text);
  margin-left: var(--space-8);
  position: relative;
}

.ds-hierarchy-connector::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: -3px;
  width: 7px;
  height: 7px;
  border-right: 1px solid var(--color-text);
  border-bottom: 1px solid var(--color-text);
  transform: rotate(45deg);
  background: var(--color-bg);
}

.ds-section-alt .ds-hierarchy-connector::after {
  background: var(--color-bg-alt);
}

.ds-summary {
  margin-top: var(--space-10);
  padding: var(--space-8);
  background: var(--color-bg-alt);
  border-left: 3px solid var(--color-border-strong);
}

.ds-summary p {
  font-size: var(--text-lg);
  margin-bottom: 0;
}

/* Relation Grid (Section 03 - Politician) */
.ds-relation-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-10);
}

.ds-entity-card {
  padding: var(--space-6);
  border: 1px solid var(--color-border);
  background: var(--color-bg);
}

.ds-entity-card.ds-entity-primary {
  border-width: 2px;
  border-color: var(--color-border-strong);
}

.ds-entity-label {
  font-family: var(--font-display);
  font-size: var(--text-xs);
  font-weight: 600;
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: var(--space-3);
}

.ds-entity-title {
  font-family: var(--font-display);
  font-size: var(--text-2xl);
  font-weight: 700;
  margin-bottom: var(--space-6);
}

.ds-entity-title-sm {
  font-family: var(--font-display);
  font-size: var(--text-lg);
  font-weight: 700;
  margin-bottom: var(--space-3);
}

.ds-entity-desc {
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
  margin-bottom: var(--space-4);
}

.ds-entity-fields {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.ds-entity-field {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: var(--text-sm);
  padding: var(--space-2) 0;
  border-bottom: 1px solid var(--color-border);
}

.ds-entity-field:last-child {
  border-bottom: none;
}

.ds-field-name {
  font-family: var(--font-display);
  font-weight: 600;
}

.ds-field-example {
  color: var(--color-text-secondary);
}

.ds-entity-fields-compact {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  margin-bottom: var(--space-4);
}

.ds-entity-example-box {
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
  padding: var(--space-3) var(--space-4);
  background: var(--color-bg-alt);
  border-left: 2px solid var(--color-border);
}

.ds-example-label {
  font-family: var(--font-display);
  font-size: var(--text-xs);
  font-weight: 700;
  margin-right: var(--space-2);
}

/* Relation Arrows */
.ds-relation-items {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-6);
}

@media (max-width: 768px) {
  .ds-relation-items {
    grid-template-columns: 1fr;
  }
}

.ds-relation-arrow {
  display: flex;
  align-items: center;
  margin-bottom: var(--space-3);
}

.ds-arrow-label {
  font-family: var(--font-display);
  font-size: var(--text-xs);
  font-weight: 700;
  padding: var(--space-1) var(--space-3);
  background: var(--color-text);
  color: var(--color-bg);
}

/* Proposal Diagram (Section 04) */
.ds-proposal-diagram {
  display: flex;
  flex-direction: column;
  gap: var(--space-8);
}

.ds-proposal-branches {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-8);
}

@media (max-width: 768px) {
  .ds-proposal-branches {
    grid-template-columns: 1fr;
  }
}

.ds-branch-header {
  margin-bottom: var(--space-4);
}

.ds-branch-arrow {
  font-family: var(--font-display);
  font-size: var(--text-xs);
  font-weight: 700;
  padding: var(--space-1) var(--space-3);
  background: var(--color-text);
  color: var(--color-bg);
}

.ds-vote-cards {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}

.ds-vote-options {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  margin-top: var(--space-3);
}

.ds-vote {
  font-family: var(--font-display);
  font-size: var(--text-xs);
  font-weight: 600;
  padding: var(--space-1) var(--space-3);
  border: 1px solid var(--color-border);
}

.ds-vote-approve { border-color: var(--color-gray-700); background: var(--color-gray-100); }
.ds-vote-oppose { border-color: var(--color-gray-500); }
.ds-vote-abstain { border-color: var(--color-gray-300); color: var(--color-text-muted); }
.ds-vote-absent { border-color: var(--color-gray-200); color: var(--color-text-muted); }

@media (prefers-color-scheme: dark) {
  .ds-vote-approve { background: var(--color-gray-800); border-color: var(--color-gray-400); }
}

/* Connection Diagram (Section 05) */
.ds-connection-nodes {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0;
  padding: var(--space-8) 0;
}

.ds-connection-node {
  text-align: center;
  padding: var(--space-6) var(--space-8);
  border: 2px solid var(--color-border-strong);
  min-width: 180px;
}

.ds-connection-icon {
  margin-bottom: var(--space-3);
}

.ds-connection-label-num {
  font-family: var(--font-display);
  font-size: var(--text-3xl);
  font-weight: 900;
  line-height: 1;
  opacity: 0.15;
}

.ds-connection-title {
  font-family: var(--font-display);
  font-size: var(--text-lg);
  font-weight: 700;
  margin-bottom: var(--space-2);
}

.ds-connection-desc {
  font-size: var(--text-xs);
  color: var(--color-text-secondary);
  margin-bottom: 0;
}

.ds-connection-line {
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  width: 80px;
  min-width: 60px;
}

.ds-connection-line::before {
  content: '';
  position: absolute;
  top: 50%;
  left: 0;
  right: 0;
  height: 1px;
  background: var(--color-text);
}

.ds-connection-line::after {
  content: '';
  position: absolute;
  top: 50%;
  right: 0;
  width: 6px;
  height: 6px;
  border-top: 1px solid var(--color-text);
  border-right: 1px solid var(--color-text);
  transform: translateY(-50%) rotate(45deg);
}

.ds-connection-line-label {
  position: relative;
  z-index: 1;
  font-family: var(--font-display);
  font-size: 0.65rem;
  font-weight: 600;
  background: var(--color-bg-alt);
  padding: var(--space-1) var(--space-2);
  white-space: nowrap;
}

@media (max-width: 768px) {
  .ds-connection-nodes {
    flex-direction: column;
  }

  .ds-connection-node {
    min-width: auto;
    width: 100%;
    max-width: 280px;
  }

  .ds-connection-line {
    width: auto;
    height: 40px;
    min-width: auto;
  }

  .ds-connection-line::before {
    top: 0;
    bottom: 0;
    left: 50%;
    right: auto;
    width: 1px;
    height: 100%;
  }

  .ds-connection-line::after {
    top: auto;
    bottom: 0;
    right: auto;
    left: 50%;
    transform: translateX(-50%) rotate(135deg);
  }
}

/* Example Scenario (Section 05) */
.ds-example-scenario {
  margin-top: var(--space-12);
  padding: var(--space-8);
  border: 1px solid var(--color-border);
  background: var(--color-bg);
}

.ds-example-title {
  font-family: var(--font-display);
  font-size: var(--text-xl);
  font-weight: 700;
  margin-bottom: var(--space-8);
}

.ds-example-steps {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-6);
}

@media (max-width: 768px) {
  .ds-example-steps {
    grid-template-columns: 1fr;
  }
}

.ds-example-step {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.ds-step-num {
  font-family: var(--font-display);
  font-size: var(--text-3xl);
  font-weight: 900;
  line-height: 1;
  opacity: 0.15;
}

.ds-step-content strong {
  font-family: var(--font-display);
  display: block;
  margin-bottom: var(--space-2);
}

.ds-step-content p {
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
  margin-bottom: 0;
}

/* Responsive hierarchy on mobile */
@media (max-width: 640px) {
  .ds-level-2,
  .ds-level-3,
  .ds-level-4 {
    padding-left: var(--space-4);
  }

  .ds-hierarchy-connector {
    margin-left: var(--space-4);
  }
}

/* ============================================
   14. Print Styles
   ============================================ */

@media print {
  .site-header,
  .site-footer,
  .hero-cta,
  .section-cta {
    display: none;
  }

  body {
    font-size: 12pt;
    line-height: 1.5;
  }

  a[href]:after {
    content: " (" attr(href) ")";
  }
}

/* ============================================
   14. Coverage Page
   ============================================ */

/* Hero */
.coverage-hero {
  min-height: 70vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: calc(var(--space-32) + 60px) var(--space-6) var(--space-24);
}

.coverage-hero-content {
  max-width: 800px;
}

.coverage-hero-badge {
  display: inline-block;
  font-family: var(--font-display);
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-text-secondary);
  border: 1px solid var(--color-border);
  padding: var(--space-2) var(--space-4);
  margin-bottom: var(--space-8);
}

.coverage-hero-title {
  font-family: var(--font-display);
  font-size: var(--text-4xl);
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: -0.02em;
  margin-bottom: var(--space-6);
}

.coverage-hero-description {
  font-size: var(--text-lg);
  color: var(--color-text-secondary);
  line-height: 1.8;
  margin-bottom: var(--space-12);
}

.coverage-hero-timestamp {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  margin-top: var(--space-4);
  padding: var(--space-2) var(--space-4);
  border: 1px dashed var(--color-border);
}

/* Split Hero: 国会/地方2カラム */
.split-hero {
  display: grid;
  grid-template-columns: 1fr 1px 1fr;
  gap: 0;
  max-width: 1000px;
  margin: 0 auto;
}

.split-hero-divider {
  background: var(--color-border);
  width: 1px;
}

.split-hero-column {
  padding: var(--space-8);
}

.split-hero-label {
  display: inline-block;
  font-family: var(--font-display);
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-text-muted);
  margin-bottom: var(--space-6);
}

.split-hero-headline {
  font-family: var(--font-display);
  font-size: var(--text-2xl);
  font-weight: 700;
  line-height: 1.3;
  letter-spacing: -0.02em;
  margin-bottom: var(--space-8);
}

.split-hero-status {
  display: inline-block;
  font-family: var(--font-display);
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.05em;
  padding: var(--space-1) var(--space-3);
  margin-bottom: var(--space-4);
}

.status-complete {
  border: 1px solid var(--color-border-strong);
  color: var(--color-text);
}

.status-expanding {
  border: 1px solid var(--color-gray-400);
  color: var(--color-text-secondary);
}

.split-metrics {
  display: flex;
  flex-direction: column;
  gap: var(--space-6);
}

.split-metric {
  padding-bottom: var(--space-4);
  border-bottom: 1px solid var(--color-gray-100);
}

.split-metric:last-child {
  border-bottom: none;
  padding-bottom: 0;
}

.split-metric-number {
  display: block;
  font-family: var(--font-display);
  font-size: var(--text-3xl);
  font-weight: 900;
  line-height: 1;
  letter-spacing: -0.03em;
  margin-bottom: var(--space-1);
}

.split-metric-unit {
  font-size: var(--text-xl);
  font-weight: 500;
}

.split-metric-label {
  display: block;
  font-family: var(--font-display);
  font-size: var(--text-sm);
  color: var(--color-text-muted);
}

@media (prefers-color-scheme: dark) {
  .split-metric {
    border-bottom-color: var(--color-gray-800);
  }
}

@media (max-width: 768px) {
  .split-hero {
    grid-template-columns: 1fr;
  }

  .split-hero-divider {
    width: 100%;
    height: 1px;
  }
}

/* Coverage Map Section */
.section-coverage-map {
  background: var(--color-bg-alt);
}

/* タブ */
/* 地図レイアウト */
.map-layout {
  display: grid;
  grid-template-columns: 1fr 380px;
  gap: var(--space-8);
  align-items: start;
}

.map-container {
  aspect-ratio: 3 / 4;
  max-height: 560px;
  border: 1px solid var(--color-border);
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
  background: var(--color-bg);
}

#japan-map-d3 {
  width: 100%;
  height: 100%;
}

.map-tooltip {
  position: absolute;
  pointer-events: none;
  font-family: var(--font-display);
  font-size: var(--text-xs);
  background: var(--color-text);
  color: var(--color-bg);
  padding: var(--space-1) var(--space-3);
  border-radius: 4px;
  white-space: nowrap;
  opacity: 0;
  transition: opacity var(--duration-fast);
  z-index: 10;
}

.map-tooltip.visible {
  opacity: 1;
}

@media (prefers-color-scheme: dark) {
  #japan-map-d3 path[fill="#555"] { fill: #bbb; }
  #japan-map-d3 path[fill="#ddd"] { fill: #444; }
  #japan-map-d3 path { stroke: #222; }
}

.map-legend {
  display: flex;
  gap: var(--space-6);
  margin-top: var(--space-4);
  font-family: var(--font-display);
  font-size: var(--text-xs);
  color: var(--color-text-muted);
}

.legend-item {
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.legend-swatch {
  width: 12px;
  height: 12px;
  border-radius: 2px;
}

.legend-swatch-full { background: var(--color-gray-700); }
.legend-swatch-none { background: var(--color-gray-200); border: 1px solid var(--color-gray-300); }

@media (prefers-color-scheme: dark) {
  .legend-swatch-full { background: var(--color-gray-300); }
  .legend-swatch-none { background: var(--color-gray-700); border-color: var(--color-gray-600); }
}

/* ランキングパネル */
.ranking-panel-title {
  font-family: var(--font-display);
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--color-text-secondary);
  letter-spacing: 0.05em;
  margin-bottom: var(--space-6);
}

.ranking-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}

.ranking-item {
  display: flex;
  align-items: center;
  gap: var(--space-4);
}

.ranking-label {
  font-family: var(--font-display);
  font-size: var(--text-sm);
  font-weight: 500;
  min-width: 100px;
  flex-shrink: 0;
}

.ranking-bar-track {
  flex: 1;
  height: 8px;
  background: var(--color-gray-100);
  border-radius: 4px;
  overflow: hidden;
}

.ranking-bar-fill {
  height: 100%;
  background: var(--color-gray-900);
  border-radius: 4px;
  transition: width var(--duration-slow) var(--ease-out);
}

.ranking-value {
  font-family: var(--font-display);
  font-size: var(--text-sm);
  font-weight: 600;
  min-width: 48px;
  text-align: right;
}

@media (prefers-color-scheme: dark) {
  .ranking-bar-track { background: var(--color-gray-800); }
  .ranking-bar-fill { background: var(--color-gray-200); }
}

/* Bottom Stats */
.bottom-stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-4);
  margin-top: var(--space-12);
  padding-top: var(--space-8);
  border-top: 1px solid var(--color-border);
}

.bottom-stat {
  text-align: center;
}

.bottom-stat-number {
  display: block;
  font-family: var(--font-display);
  font-size: var(--text-2xl);
  font-weight: 700;
  line-height: 1.2;
}

.bottom-stat-label {
  font-family: var(--font-display);
  font-size: var(--text-xs);
  color: var(--color-text-muted);
}

/* タイムライン（ガントチャート） */
.timeline-chart {
  display: flex;
  flex-direction: column;
  gap: var(--space-5);
  margin-top: var(--space-8);
}

.timeline-section-label {
  font-family: var(--font-display);
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--color-text);
  letter-spacing: 0.05em;
  margin-top: var(--space-8);
  margin-bottom: var(--space-4);
  padding-bottom: var(--space-2);
  border-bottom: 1px solid var(--color-border);
}

.timeline-section-label:first-of-type {
  margin-top: 0;
}

.timeline-row {
  display: grid;
  grid-template-columns: 120px 1fr;
  gap: var(--space-4);
  align-items: center;
}

.timeline-label {
  font-family: var(--font-display);
  font-size: var(--text-sm);
  font-weight: 500;
  text-align: right;
}

.timeline-track {
  height: 24px;
  background: var(--color-gray-100);
  border-radius: 2px;
  position: relative;
  overflow: hidden;
}

.timeline-bar {
  position: absolute;
  top: 0;
  height: 100%;
  background: var(--color-gray-900);
  border-radius: 2px;
  display: flex;
  align-items: center;
  justify-content: flex-end;
  padding-right: var(--space-2);
}

.timeline-bar-label {
  font-family: var(--font-display);
  font-size: 10px;
  font-weight: 600;
  color: var(--color-white);
  white-space: nowrap;
}

.timeline-bar.intensity-high { opacity: 1; }
.timeline-bar.intensity-mid { opacity: 0.6; }
.timeline-bar.intensity-low { opacity: 0.35; }

@media (prefers-color-scheme: dark) {
  .timeline-track { background: var(--color-gray-800); }
  .timeline-bar { background: var(--color-gray-300); }
  .timeline-bar-label { color: var(--color-gray-900); }
}

.timeline-axis {
  display: grid;
  grid-template-columns: 120px 1fr;
  gap: var(--space-4);
  margin-top: var(--space-2);
}

.timeline-axis-labels {
  display: flex;
  justify-content: space-between;
  font-family: var(--font-display);
  font-size: var(--text-xs);
  color: var(--color-text-muted);
}

/* データ品質セクション */
.section-coverage-quality {
  background: var(--color-bg-alt);
}

.quality-cards {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-6);
  margin-top: var(--space-8);
}

.quality-card {
  border: 1px solid var(--color-border);
  padding: var(--space-8);
  background: var(--color-bg);
}

.quality-card-header {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  margin-bottom: var(--space-6);
}

.quality-card-title {
  font-family: var(--font-display);
  font-size: var(--text-lg);
  font-weight: 600;
}

.quality-card-value {
  font-family: var(--font-display);
  font-size: var(--text-3xl);
  font-weight: 900;
  letter-spacing: -0.03em;
}

.progress-bar-track {
  width: 100%;
  height: 12px;
  background: var(--color-gray-100);
  border-radius: 6px;
  overflow: hidden;
  margin-bottom: var(--space-6);
}

.progress-bar-fill {
  height: 100%;
  background: var(--color-gray-900);
  border-radius: 6px;
  transition: width 1s var(--ease-out);
}

@media (prefers-color-scheme: dark) {
  .progress-bar-track { background: var(--color-gray-800); }
  .progress-bar-fill { background: var(--color-gray-200); }
}

.quality-detail {
  font-family: var(--font-display);
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
  line-height: 1.8;
}

.quality-detail-row {
  display: flex;
  justify-content: space-between;
  padding: var(--space-2) 0;
  border-bottom: 1px solid var(--color-gray-100);
}

.quality-detail-label {
  color: var(--color-text-muted);
}

.quality-detail-value {
  font-weight: 600;
  color: var(--color-text);
}

@media (prefers-color-scheme: dark) {
  .quality-detail-row { border-bottom-color: var(--color-gray-800); }
}

.enables-list {
  list-style: none;
  margin-top: var(--space-4);
}

.enables-list li {
  font-family: var(--font-display);
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
  padding: var(--space-2) 0;
}

.enables-list li::before {
  content: '\2014\00a0';
  color: var(--color-text-muted);
}

.quality-commitment {
  margin-top: var(--space-8);
  padding: var(--space-6);
  border: 1px solid var(--color-border);
  background: var(--color-bg-alt);
}

.quality-commitment-title {
  font-family: var(--font-display);
  font-size: var(--text-base);
  font-weight: 600;
  margin-bottom: var(--space-3);
}

.quality-commitment p {
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
  margin-bottom: 0;
}

/* CTA メタ */
.cta-meta {
  margin-top: var(--space-8);
  font-family: var(--font-display);
  font-size: var(--text-xs);
  color: var(--color-gray-500);
}

.section-cta .cta-meta {
  color: var(--color-gray-400);
}

/* Coverage レスポンシブ */
@media (max-width: 1024px) {
  .map-layout { grid-template-columns: 1fr; }
  .quality-cards { grid-template-columns: 1fr; }
}

@media (max-width: 768px) {
  .timeline-row {
    grid-template-columns: 80px 1fr;
  }

  .timeline-label {
    font-size: var(--text-xs);
  }

  .bottom-stats {
    grid-template-columns: repeat(2, 1fr);
  }
}

/* ============================================
   15. Data Structure Page — D3.js + Mermaid
   ============================================ */

/* セクション */
.dsv-section {
  padding: var(--space-16) var(--space-6);
}

.dsv-section-alt {
  background: var(--color-bg-alt);
}

/* Mermaid.js図表コンテナ */
.dsv-diagram {
  margin-top: var(--space-8);
  padding: var(--space-6);
  border: 1px solid var(--color-border);
  background: var(--color-bg);
  overflow-x: auto;
}

.dsv-diagram .mermaid {
  display: flex;
  justify-content: center;
}

.dsv-diagram .mermaid svg {
  max-width: 100%;
  height: auto;
}

.dsv-section-alt .dsv-diagram {
  background: var(--color-bg);
}

/* D3.jsコンテナ */
.dsv-d3-container {
  position: relative;
  margin-top: var(--space-8);
}

.dsv-d3-graph {
  width: 100%;
  min-height: 500px;
  border: 1px solid var(--color-border);
  background: var(--color-bg);
  overflow: hidden;
}

/* ER図サブタイトル */
.dsv-er-subtitle {
  font-family: var(--font-display);
  font-size: var(--text-sm);
  font-weight: 700;
  margin-bottom: var(--space-3);
  padding-left: var(--space-3);
  border-left: 3px solid var(--color-border-strong);
}

/* ER図3列グリッド */
.dsv-er-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-6);
  margin-top: var(--space-8);
}

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

.dsv-er-column {
  min-width: 0;
}

.dsv-diagram-compact {
  padding: var(--space-3);
}

.dsv-diagram-compact .mermaid svg {
  max-width: 100%;
  height: auto;
}

.dsv-d3-graph svg {
  display: block;
}

/* D3.js詳細パネル */
.dsv-d3-panel {
  position: absolute;
  top: var(--space-4);
  right: var(--space-4);
  width: 280px;
  padding: var(--space-6);
  background: var(--color-bg);
  border: 2px solid var(--color-border-strong);
  box-shadow: 0 4px 24px rgba(0, 0, 0, 0.1);
  z-index: 10;
}

.dsv-d3-panel-close {
  position: absolute;
  top: var(--space-2);
  right: var(--space-3);
  background: none;
  border: none;
  font-size: var(--text-xl);
  cursor: pointer;
  color: var(--color-text-muted);
  line-height: 1;
}

.dsv-d3-panel-close:hover {
  color: var(--color-text);
}

.dsv-d3-panel-title {
  font-family: var(--font-display);
  font-size: var(--text-xl);
  font-weight: 700;
  margin-bottom: var(--space-2);
}

.dsv-d3-panel-group {
  font-family: var(--font-display);
  font-size: var(--text-xs);
  font-weight: 600;
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: var(--space-3);
}

.dsv-d3-panel-desc {
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
  margin-bottom: var(--space-4);
}

.dsv-d3-panel-fields {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
}

.dsv-d3-panel-field {
  font-family: var(--font-display);
  font-size: var(--text-xs);
  font-weight: 500;
  padding: var(--space-1) var(--space-3);
  border: 1px solid var(--color-border);
  background: var(--color-bg-alt);
}

/* D3.js凡例 */
.dsv-d3-legend {
  display: flex;
  justify-content: center;
  gap: var(--space-6);
  margin-top: var(--space-4);
}

.dsv-d3-legend-item {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-family: var(--font-display);
  font-size: var(--text-xs);
  font-weight: 500;
  color: var(--color-text-secondary);
}

/* レスポンシブ */
@media (max-width: 640px) {
  .dsv-d3-panel {
    position: fixed;
    top: auto;
    bottom: 0;
    left: 0;
    right: 0;
    width: 100%;
    border: none;
    border-top: 2px solid var(--color-border-strong);
  }

  .dsv-d3-legend {
    flex-wrap: wrap;
    gap: var(--space-3);
  }
}

/* ============================================
   BQクエリツールチップ
   ============================================ */
.bq-queryable {
  cursor: pointer;
  position: relative;
  transition: background-color 0.15s ease;
}

.bq-queryable::after {
  content: 'BQ';
  position: absolute;
  top: 4px;
  right: 4px;
  font-family: var(--font-mono);
  font-size: 9px;
  font-weight: 700;
  letter-spacing: 0.05em;
  color: var(--color-gray-400);
  background: var(--color-gray-100);
  border: 1px solid var(--color-gray-200);
  padding: 1px 4px;
  line-height: 1.2;
  opacity: 0;
  transition: opacity 0.15s ease;
  pointer-events: none;
}

.bq-queryable:hover::after,
.bq-queryable.bq-active::after {
  opacity: 1;
}

.bq-queryable:hover,
.bq-queryable.bq-active {
  background-color: var(--color-gray-50);
}

/* quality-cardは既に背景があるため区別 */
.quality-card.bq-queryable:hover,
.quality-card.bq-queryable.bq-active {
  border-color: var(--color-gray-400);
}

.bq-tooltip {
  position: absolute;
  z-index: 9999;
  max-width: 520px;
  min-width: 320px;
  background: var(--color-gray-900);
  border: 1px solid var(--color-gray-700);
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
  opacity: 0;
  visibility: hidden;
  transform: translateY(4px);
  transition: opacity 0.15s ease, visibility 0.15s ease, transform 0.15s ease;
  pointer-events: none;
}

.bq-tooltip.visible {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
  pointer-events: auto;
}

.bq-tooltip-header {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px 12px;
  border-bottom: 1px solid var(--color-gray-700);
}

.bq-tooltip-icon {
  font-family: var(--font-mono);
  font-size: 10px;
  font-weight: 700;
  color: var(--color-gray-900);
  background: var(--color-gray-300);
  padding: 2px 5px;
  letter-spacing: 0.05em;
}

.bq-tooltip-title {
  font-family: var(--font-display);
  font-size: 11px;
  font-weight: 500;
  color: var(--color-gray-400);
  flex: 1;
}

.bq-tooltip-copy {
  font-family: var(--font-display);
  font-size: 11px;
  font-weight: 500;
  color: var(--color-gray-400);
  background: transparent;
  border: 1px solid var(--color-gray-600);
  padding: 2px 10px;
  cursor: pointer;
  transition: all 0.15s ease;
}

.bq-tooltip-copy:hover {
  color: var(--color-white);
  border-color: var(--color-gray-400);
}

.bq-tooltip-copy.copied {
  color: var(--color-white);
  background: var(--color-gray-700);
  border-color: var(--color-gray-500);
}

.bq-tooltip-query {
  margin: 0;
  padding: 12px 16px;
  overflow-x: auto;
}

.bq-tooltip-query code {
  font-family: var(--font-mono);
  font-size: 12px;
  line-height: 1.6;
  color: var(--color-gray-200);
  white-space: pre;
  tab-size: 2;
}

/* SQLキーワード風の色付けはCSSのみでは困難なため、
   モノクロームトーンの明暗差で視認性を確保 */

@media (max-width: 768px) {
  .bq-tooltip {
    max-width: calc(100vw - 24px);
    min-width: 280px;
  }

  .bq-tooltip-query code {
    font-size: 11px;
  }

  .bq-queryable::after {
    opacity: 0.6;
  }
}

/* ============================================
   Data Lineage Page (データの作られ方)
   ============================================ */

/* Hero */
.dl-hero {
  padding: var(--space-16) 0 var(--space-10);
  background: var(--color-bg-alt);
  border-bottom: 1px solid var(--color-border);
}
.dl-hero .container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--space-6);
}
.dl-hero-title {
  font-family: var(--font-display);
  font-size: var(--text-4xl);
  margin: var(--space-4) 0 var(--space-5);
  letter-spacing: -0.02em;
}
.dl-hero-lead {
  font-family: var(--font-body);
  font-size: var(--text-lg);
  max-width: 720px;
  color: var(--color-text-secondary);
  line-height: 1.7;
}

/* Legend */
.dl-legend {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  margin-top: var(--space-6);
}
.dl-legend-compact {
  margin-top: var(--space-4);
  font-size: var(--text-xs);
}
.dl-badge {
  display: inline-block;
  padding: 3px 10px;
  border-radius: 4px;
  font-family: var(--font-display);
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.03em;
  background: transparent;
  color: var(--color-text);
  border: 1px solid var(--color-border-strong);
}
.dl-badge-source {
  border: 2px solid var(--color-border-strong);
  font-weight: 700;
}
.dl-badge-process {
  border: 1px solid var(--color-text-muted);
  color: var(--color-text-secondary);
}
.dl-badge-table {
  border: 1.5px dashed var(--color-border-strong);
}
.dl-badge-public {
  background: var(--color-border-strong);
  color: var(--color-bg);
  border: 2px solid var(--color-border-strong);
  font-weight: 700;
}

/* Section container */
.dl-section { padding: var(--space-16) 0; }
.dl-section .container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--space-6);
}

/* Card grid (Level 1) */
.dl-cards {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: var(--space-5);
}
.dl-card {
  display: block;
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: 12px;
  padding: var(--space-6);
  text-decoration: none;
  color: inherit;
  transition: all var(--duration-base) var(--ease-out);
}
.dl-card:hover {
  transform: translateY(-2px);
  border-color: var(--color-border-strong);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.06);
  opacity: 1;
}
.dl-card-disabled {
  opacity: 0.55;
  cursor: not-allowed;
  pointer-events: none;
}
.dl-card-icon {
  font-size: 2.25rem;
  margin-bottom: var(--space-3);
  line-height: 1;
}
.dl-card-title {
  font-family: var(--font-display);
  font-size: var(--text-xl);
  margin-bottom: var(--space-2);
}
.dl-card-desc {
  font-family: var(--font-body);
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
  line-height: 1.65;
  margin-bottom: var(--space-4);
}
.dl-card-meta {
  padding-top: var(--space-3);
  border-top: 1px solid var(--color-border);
  font-family: var(--font-display);
  font-size: var(--text-xs);
  color: var(--color-text-muted);
}
.dl-coming-soon {
  display: inline-block;
  margin-top: var(--space-2);
  padding: 2px 10px;
  background: var(--color-gray-100);
  color: var(--color-text-muted);
  font-family: var(--font-display);
  font-size: var(--text-xs);
  border-radius: 12px;
  letter-spacing: 0.03em;
}
@media (prefers-color-scheme: dark) {
  .dl-coming-soon { background: var(--color-gray-800); }
}

/* Detail page */
.dl-detail { padding: var(--space-12) 0 var(--space-16); }
.dl-detail-container {
  max-width: 960px;
  margin: 0 auto;
  padding: 0 var(--space-6);
}
.dl-breadcrumb {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-family: var(--font-display);
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  margin-bottom: var(--space-6);
}
.dl-breadcrumb a { text-decoration: none; color: var(--color-text-secondary); }
.dl-breadcrumb a:hover { color: var(--color-text); }

.dl-detail-header { margin-bottom: var(--space-10); }
.dl-detail-icon {
  font-size: 3rem;
  line-height: 1;
  margin-bottom: var(--space-3);
}
.dl-detail-title {
  font-family: var(--font-display);
  font-size: var(--text-4xl);
  letter-spacing: -0.02em;
  margin-bottom: var(--space-3);
}
.dl-detail-scope {
  font-family: var(--font-display);
  font-size: var(--text-sm);
  color: var(--color-text-muted);
}

/* Summary box */
.dl-summary-box {
  background: var(--color-bg-alt);
  border: 1px solid var(--color-border);
  border-left: 4px solid var(--color-border-strong);
  border-radius: 10px;
  padding: var(--space-6);
  margin-bottom: var(--space-10);
}
.dl-summary-title {
  font-family: var(--font-display);
  font-size: var(--text-lg);
  margin-bottom: var(--space-3);
}
.dl-summary-body {
  font-family: var(--font-body);
  font-size: var(--text-base);
  line-height: 1.8;
  white-space: pre-line;
  margin: 0;
}

/* Flow section */
.dl-flow-section { margin-bottom: var(--space-10); }
.dl-section-title {
  font-family: var(--font-display);
  font-size: var(--text-2xl);
  margin-bottom: var(--space-5);
  padding-bottom: var(--space-3);
  border-bottom: 1px solid var(--color-border);
}
.dl-mermaid-wrap {
  background: var(--color-bg-alt);
  border: 1px solid var(--color-border);
  border-radius: 10px;
  padding: var(--space-6);
  overflow-x: auto;
  text-align: center;
}
.dl-mermaid-wrap pre.mermaid {
  margin: 0;
  background: transparent;
  display: inline-block;
  min-width: 100%;
}

/* Technical details (collapsible) */
.dl-tech {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: 10px;
  margin-bottom: var(--space-8);
  overflow: hidden;
}
.dl-tech-summary {
  padding: var(--space-5) var(--space-6);
  cursor: pointer;
  list-style: none;
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: var(--text-base);
  color: var(--color-text);
  background: var(--color-bg-alt);
  transition: background var(--duration-fast) var(--ease-out);
}
.dl-tech-summary::-webkit-details-marker { display: none; }
.dl-tech-summary:hover { background: var(--color-gray-100); }
@media (prefers-color-scheme: dark) {
  .dl-tech-summary:hover { background: var(--color-gray-800); }
}
.dl-tech-toggle {
  font-size: var(--text-xs);
  transition: transform var(--duration-fast) var(--ease-out);
}
.dl-tech[open] .dl-tech-toggle { transform: rotate(180deg); }
.dl-tech-body {
  padding: var(--space-5) var(--space-6) var(--space-6);
  border-top: 1px solid var(--color-border);
}
.dl-tech-heading {
  font-family: var(--font-display);
  font-size: var(--text-base);
  font-weight: 600;
  margin: var(--space-6) 0 var(--space-3);
}
.dl-tech-heading:first-of-type { margin-top: 0; }
.dl-tech-note {
  font-family: var(--font-body);
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
  line-height: 1.7;
  margin: 0 0 var(--space-3);
}

.dl-table-wrap {
  overflow-x: auto;
  border: 1px solid var(--color-border);
  border-radius: 6px;
}
.dl-tech-table {
  width: 100%;
  border-collapse: collapse;
  font-family: var(--font-display);
  font-size: var(--text-sm);
}
.dl-tech-table th,
.dl-tech-table td {
  padding: var(--space-3) var(--space-4);
  text-align: left;
  border-bottom: 1px solid var(--color-border);
  vertical-align: top;
}
.dl-tech-table tbody tr:last-child td { border-bottom: none; }
.dl-tech-table th {
  background: var(--color-bg-alt);
  color: var(--color-text-muted);
  font-weight: 600;
  font-size: var(--text-xs);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}
.dl-tech-table code {
  background: var(--color-bg-alt);
  padding: 2px 8px;
  border-radius: 4px;
  font-family: var(--font-mono);
  font-size: 0.85em;
  word-break: break-word;
}
.dl-ext-link {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  word-break: break-all;
}

.dl-back-nav { margin-top: var(--space-8); }

.dl-empty {
  font-family: var(--font-body);
  color: var(--color-text-muted);
  padding: var(--space-8) 0;
}

@media (max-width: 640px) {
  .dl-hero-title { font-size: var(--text-3xl); }
  .dl-detail-title { font-size: var(--text-3xl); }
  .dl-tech-summary { padding: var(--space-4); }
  .dl-tech-body { padding: var(--space-4); }
}

/* Data Lineage - Acknowledgments */
.dl-acknowledgments-section {
  padding: var(--space-12) 0 var(--space-8);
}
.dl-acknowledgments {
  max-width: 820px;
  margin: 0 auto;
  padding: var(--space-8);
  border: 1px solid var(--color-border);
  border-left: 4px solid var(--color-border-strong);
  border-radius: 10px;
  background: var(--color-bg-alt);
}
.dl-acknowledgments-title {
  font-family: var(--font-display);
  font-size: var(--text-xl);
  font-weight: 700;
  margin-bottom: var(--space-4);
  letter-spacing: -0.01em;
}
.dl-acknowledgments-lead {
  font-family: var(--font-body);
  font-size: var(--text-base);
  color: var(--color-text);
  line-height: 1.85;
  margin-bottom: var(--space-6);
}
.dl-acknowledgments-list {
  list-style: none;
  padding: 0;
  margin: 0 0 var(--space-6);
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}
.dl-acknowledgments-list li {
  padding: var(--space-3) var(--space-4);
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: 6px;
  font-family: var(--font-display);
  font-size: var(--text-sm);
  line-height: 1.6;
}
.dl-acknowledgments-list a {
  color: var(--color-text);
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
  font-weight: 600;
}
.dl-acknowledgments-url {
  display: block;
  margin-top: 2px;
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  word-break: break-all;
}
.dl-acknowledgments-note {
  font-family: var(--font-body);
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
  line-height: 1.8;
  margin: 0;
}

/* Home - Hero Nav Grid（スマホ対応の主要ページリンク） */
.hero-nav-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: var(--space-3);
  margin-top: var(--space-8);
  width: 100%;
  max-width: 960px;
}
.hero-nav-card {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3);
  padding: var(--space-4) var(--space-5);
  background: var(--color-bg);
  border: 1px solid var(--color-border-strong);
  border-radius: 6px;
  color: var(--color-text);
  font-family: var(--font-display);
  font-size: var(--text-base);
  font-weight: 600;
  text-decoration: none;
  letter-spacing: 0.01em;
  transition: all var(--duration-base) var(--ease-out);
  min-height: 56px;
}
.hero-nav-card:hover,
.hero-nav-card:focus-visible {
  background: var(--color-border-strong);
  color: var(--color-bg);
  opacity: 1;
  transform: translateY(-1px);
}
.hero-nav-card-label {
  flex: 1;
  text-align: left;
}
.hero-nav-card-arrow {
  font-size: var(--text-sm);
  transition: transform var(--duration-fast) var(--ease-out);
}
.hero-nav-card:hover .hero-nav-card-arrow,
.hero-nav-card:focus-visible .hero-nav-card-arrow {
  transform: translateX(3px);
}

@media (max-width: 640px) {
  .hero-nav-grid {
    grid-template-columns: 1fr 1fr;
    gap: var(--space-2);
    margin-top: var(--space-6);
  }
  .hero-nav-card {
    padding: var(--space-3) var(--space-4);
    font-size: var(--text-sm);
    min-height: 52px;
  }
}