:root {
  color-scheme: light dark;
  --bg: #0f172a;
  --bg-alt: #111827;
  --text: #f8fafc;
  --muted: rgba(248, 250, 252, 0.72);
  --accent: #38bdf8;
  --accent-soft: rgba(56, 189, 248, 0.12);
  --shadow: 0 25px 60px rgba(15, 23, 42, 0.35);
  font-size: 16px;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: 'Noto Sans JP', 'Hiragino Kaku Gothic ProN', 'Yu Gothic', sans-serif;
  background: radial-gradient(circle at 20% -10%, rgba(56, 189, 248, 0.25), transparent 55%),
    radial-gradient(circle at 90% 10%, rgba(14, 165, 233, 0.18), transparent 50%), var(--bg);
  color: var(--text);
  line-height: 1.75;
  letter-spacing: 0.01em;
  -webkit-font-smoothing: antialiased;
}

a {
  color: inherit;
  text-decoration: none;
}

a:focus-visible {
  outline: 3px solid rgba(248, 250, 252, 0.7);
  outline-offset: 4px;
  border-radius: 999px;
}

.inner {
  width: min(92vw, 640px);
  margin: 0 auto;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  backdrop-filter: blur(18px);
  background: rgba(15, 23, 42, 0.7);
  border-bottom: 1px solid rgba(148, 163, 184, 0.2);
}

.site-header .inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1rem 0;
}

.breadcrumbs {
  padding: 1.25rem 0 0.5rem;
}

.breadcrumb-list {
  margin: 0;
  padding: 0;
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem;
  font-size: 0.78rem;
  color: var(--muted);
}

.breadcrumb-list li {
  display: flex;
  align-items: center;
  gap: 0.35rem;
}

.breadcrumb-list li + li::before {
  content: '›';
  color: var(--muted);
  opacity: 0.7;
}

.breadcrumb-list a {
  color: inherit;
  text-decoration: none;
  transition: color 0.2s ease;
}

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

.breadcrumb-list span[aria-current='page'] {
  color: var(--text);
  font-weight: 600;
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.brand-mark {
  width: 42px;
  height: 42px;
  display: grid;
  place-items: center;
  border-radius: 999px;
  background: linear-gradient(135deg, rgba(56, 189, 248, 0.35), rgba(14, 165, 233, 0.1));
  color: var(--accent);
  font-size: 1.4rem;
  font-weight: 700;
  box-shadow: inset 0 0 0 1px rgba(56, 189, 248, 0.25);
}

.brand-label {
  margin: 0;
  font-size: 0.7rem;
  color: var(--muted);
}

.brand-title {
  margin: 0;
  font-size: 1.05rem;
  font-weight: 700;
}

.header-cta {
  padding: 0.65rem 1.4rem;
  border-radius: 999px;
  background: rgba(56, 189, 248, 0.18);
  color: var(--text);
  font-weight: 600;
  letter-spacing: 0.12em;
  font-size: 0.75rem;
  transition: background 0.2s ease, transform 0.2s ease;
}

.header-cta:hover {
  background: rgba(56, 189, 248, 0.3);
  transform: translateY(-2px);
}

.hero {
  padding: 5.5rem 0 4.5rem;
}

.hero-kicker {
  margin: 0;
  text-transform: uppercase;
  font-size: 0.7rem;
  letter-spacing: 0.2em;
  color: var(--muted);
}

.hero h1 {
  margin: 1.5rem 0 1rem;
  font-size: clamp(2rem, 8vw, 3.25rem);
  line-height: 1.25;
  font-weight: 800;
}

.hero-copy {
  margin: 0 0 2rem;
  color: var(--muted);
  font-size: 0.95rem;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.cta,
.ghost {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.85rem 1.6rem;
  border-radius: 999px;
  font-weight: 700;
  letter-spacing: 0.12em;
  font-size: 0.78rem;
  text-transform: uppercase;
  transition: transform 0.2s ease, box-shadow 0.2s ease, background 0.2s ease;
}

.cta {
  background: var(--accent);
  color: #0f172a;
  box-shadow: var(--shadow);
}

.cta:hover {
  transform: translateY(-3px);
}

.ghost {
  background: var(--accent-soft);
  color: var(--text);
}

.ghost:hover {
  background: rgba(56, 189, 248, 0.2);
}

.vibes {
  padding: 3.5rem 0;
}

.vibes h2 {
  margin: 0 0 2rem;
  font-size: 1.6rem;
}

.vibe-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 2rem;
}

.vibe-list h3 {
  margin: 0 0 0.75rem;
  font-size: 1.1rem;
}

.vibe-list p {
  margin: 0;
  color: var(--muted);
  font-size: 0.95rem;
}

.note {
  padding: 4rem 0 5rem;
}

.note h2 {
  margin: 0 0 1.5rem;
  font-size: 1.9rem;
}

.note p {
  margin: 0 0 2rem;
  color: var(--muted);
  font-size: 0.95rem;
}

.site-footer {
  padding: 2.5rem 0;
  background: var(--bg-alt);
  border-top: 1px solid rgba(148, 163, 184, 0.18);
}

.site-footer small {
  color: rgba(226, 232, 240, 0.7);
  font-size: 0.75rem;
}

.page-main {
  padding: 5.5rem 0 5rem;
}

.page-main h1 {
  margin: 0 0 1.5rem;
  font-size: clamp(1.9rem, 6vw, 2.6rem);
  font-weight: 800;
}

.page-main p {
  margin: 0 0 1.5rem;
  color: var(--muted);
  font-size: 0.95rem;
}

.page-list,
.page-steps {
  margin: 0 0 2.5rem;
  padding: 0;
  display: grid;
  gap: 1.2rem;
  font-size: 0.95rem;
  color: var(--muted);
}

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

.page-steps {
  counter-reset: steps;
  list-style: decimal inside;
}

.page-list strong {
  color: var(--text);
  font-weight: 700;
}

.page-links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

@media (min-width: 720px) {
  .site-header .inner {
    padding: 1.4rem 0;
  }

  .hero {
    padding: 7rem 0 5.5rem;
  }

  .hero-copy {
    font-size: 1.05rem;
    max-width: 520px;
  }

  .vibe-list {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}
.header-actions {
  display: flex;
  align-items: center;
  gap: 1.2rem;
}

.site-nav-list {
  display: flex;
  align-items: center;
  gap: 1rem;
  list-style: none;
  margin: 0;
  padding: 0;
  font-size: 0.78rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--muted);
}

.site-nav-list a {
  padding: 0.4rem 0.6rem;
  border-radius: 999px;
  transition: background 0.2s ease;
}

.site-nav-list a:hover {
  background: rgba(56, 189, 248, 0.18);
  color: var(--text);
}

.site-map {
  padding: 3.5rem 0;
}

.site-map h2 {
  margin: 0 0 2rem;
  font-size: 1.6rem;
}

.map-grid {
  display: grid;
  gap: 1.8rem;
}

.map-block {
  padding: 1.6rem;
  border-radius: 18px;
  background: rgba(15, 23, 42, 0.6);
  border: 1px solid rgba(148, 163, 184, 0.18);
  box-shadow: inset 0 0 0 1px rgba(56, 189, 248, 0.08);
}

.map-block h3 {
  margin: 0 0 1rem;
  font-size: 1.1rem;
}

.map-block ul {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0.75rem;
}

.map-block a {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem;
  padding: 0.6rem 0.75rem;
  border-radius: 12px;
  background: rgba(56, 189, 248, 0.08);
  color: var(--text);
  font-size: 0.9rem;
  transition: background 0.2s ease, transform 0.2s ease;
}

.map-block a:hover {
  background: rgba(56, 189, 248, 0.18);
  transform: translateY(-2px);
}

.trend-table {
  padding: 3.5rem 0;
}

.trend-table h2 {
  margin: 0 0 1.5rem;
  font-size: 1.5rem;
}

.trend-cards {
  display: grid;
  gap: 1.5rem;
}

@media (min-width: 680px) {
  .trend-cards {
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  }
}

.trend-card {
  padding: 1.5rem;
  border-radius: 18px;
  border: 1px solid rgba(148, 163, 184, 0.18);
  background: rgba(15, 23, 42, 0.6);
  display: grid;
  gap: 1.1rem;
}

.trend-topic-label {
  margin: 0;
  font-size: 0.7rem;
  letter-spacing: 0.16em;
  color: var(--muted);
  text-transform: uppercase;
}

.trend-card h3 {
  margin: 0;
  font-size: 1.2rem;
  font-weight: 700;
}

.trend-card dl {
  margin: 0;
  display: grid;
  gap: 1rem;
}

.trend-field {
  display: grid;
  gap: 0.35rem;
}

.trend-field dt {
  font-size: 0.75rem;
  letter-spacing: 0.08em;
  color: var(--muted);
  text-transform: uppercase;
}

.trend-field dd {
  margin: 0;
  font-size: 0.95rem;
  color: var(--text);
}

.hashtags {
  font-family: 'Noto Sans JP', sans-serif;
  letter-spacing: 0.03em;
}

.topic-overview {
  padding: 3.5rem 0;
}

.topic-overview h2 {
  margin: 0 0 1.25rem;
  font-size: 1.6rem;
}

.overview-intro {
  margin: 0 0 2rem;
  color: var(--muted);
  font-size: 0.95rem;
}

.topic-grid {
  display: grid;
  gap: 1.5rem;
}

.topic-card {
  display: block;
  padding: 1.6rem;
  border-radius: 18px;
  background: rgba(15, 23, 42, 0.6);
  border: 1px solid rgba(148, 163, 184, 0.2);
  transition: transform 0.2s ease, border-color 0.2s ease;
}

.topic-card:hover {
  transform: translateY(-4px);
  border-color: rgba(56, 189, 248, 0.5);
}

.topic-card-category {
  margin: 0 0 0.5rem;
  font-size: 0.72rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--muted);
}

.topic-card h3 {
  margin: 0 0 0.8rem;
  font-size: 1.2rem;
}

.topic-card p {
  margin: 0;
  color: var(--muted);
  font-size: 0.95rem;
}

.cross-links {
  padding: 3.5rem 0 5rem;
}

.cross-links h2 {
  margin: 0 0 1.5rem;
  font-size: 1.5rem;
}

.cross-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 1rem;
  color: var(--muted);
  font-size: 0.95rem;
}

.topic-hero {
  padding: 5.5rem 0 3rem;
}

.topic-category {
  margin: 0 0 0.75rem;
  font-size: 0.75rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--muted);
}

.topic-summary {
  color: var(--muted);
  font-size: 0.95rem;
}

.topic-highlights {
  margin: 1.5rem 0 1.5rem;
  padding-left: 1.4rem;
  color: var(--muted);
  font-size: 0.95rem;
}

.topic-highlights li + li {
  margin-top: 0.5rem;
}

.topic-reason {
  margin: 0;
  color: rgba(248, 250, 252, 0.82);
  font-weight: 600;
}

.topic-sections {
  padding: 0 0 4rem;
}

.topic-section + .topic-section {
  margin-top: 2.5rem;
}

.topic-section h2 {
  margin: 0 0 1rem;
  font-size: 1.3rem;
}

.topic-list {
  margin: 0;
  padding-left: 1.4rem;
  color: var(--muted);
  font-size: 0.95rem;
  display: grid;
  gap: 0.85rem;
}

.topic-list.ordered {
  padding-left: 1.6rem;
}

.topic-list li {
  line-height: 1.6;
}

.item-title {
  display: block;
  font-weight: 700;
  color: var(--text);
}

.item-body {
  display: block;
  margin-top: 0.2rem;
}

.related-topics {
  padding: 0 0 5rem;
}

.related-grid {
  display: grid;
  gap: 1.5rem;
}

.related-card {
  display: block;
  padding: 1.4rem 1.6rem;
  border-radius: 16px;
  background: rgba(15, 23, 42, 0.6);
  border: 1px solid rgba(148, 163, 184, 0.2);
  transition: border-color 0.2s ease, transform 0.2s ease;
}

.related-card:hover {
  border-color: rgba(56, 189, 248, 0.5);
  transform: translateY(-3px);
}

.related-card p {
  margin: 0;
  color: var(--muted);
  font-size: 0.9rem;
}

.related-label {
  margin: 0 0 0.6rem;
  font-size: 0.8rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--text);
}

@media (min-width: 720px) {
  .map-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .topic-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .related-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (max-width: 640px) {
  .site-nav-list {
    display: none;
  }

  .header-actions {
    justify-content: flex-end;
  }

  .table-wrapper {
    border-radius: 12px;
  }
}