:root {
  --bg: #f6f1e8;
  --bg-elevated: #fbf8f2;
  --surface: #fffdfc;
  --surface-strong: #f0e9dd;
  --border: #d8ccbc;
  --text: #1f1a17;
  --text-muted: #5f5750;
  --text-soft: #857a70;
  --accent-navy: #1d3557;
  --accent-olive: #5d6b3f;
  --accent-rust: #a6522b;
  --accent-gold: #b08a2e;
  --quote-bg: #f3eee5;
  --selection-bg: #e7eef5;
  --shadow-soft: 0 10px 30px rgba(31, 26, 23, 0.06);
  --shadow-hover: 0 16px 42px rgba(31, 26, 23, 0.1);
  --radius-card: 18px;
  --radius-panel: 24px;
  --radius-pill: 999px;
  --content-max: 1200px;
  --reading-max: 760px;
  --transition-soft: 180ms ease;
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--text);
  background:
    radial-gradient(circle at top, rgba(176, 138, 46, 0.08), transparent 35%),
    linear-gradient(180deg, var(--bg-elevated), var(--bg));
  font-family: "Noto Serif JP", "Hiragino Mincho ProN", serif;
  line-height: 1.7;
  min-height: 100vh;
}

a {
  color: var(--accent-navy);
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

button,
input {
  font: inherit;
}

button {
  cursor: pointer;
}

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

::selection {
  background: var(--selection-bg);
}

.container {
  width: min(calc(100% - 2rem), var(--content-max));
  margin: 0 auto;
}

.site-shell {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  backdrop-filter: blur(16px);
  background: rgba(251, 248, 242, 0.84);
  border-bottom: 1px solid rgba(216, 204, 188, 0.7);
}

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

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.9rem;
  color: var(--text);
}

.brand:hover {
  text-decoration: none;
}

.brand-mark {
  width: 3rem;
  height: 3rem;
  display: block;
  object-fit: contain;
  flex: 0 0 auto;
  transform: scale(1.28);
  transform-origin: center;
}

.brand-copy {
  display: flex;
  flex-direction: column;
  gap: 0.08rem;
}

.hero-brand {
  display: inline-flex;
  align-items: center;
  gap: 1rem;
  margin-bottom: 1rem;
}

.hero-mark {
  width: clamp(4.5rem, 9vw, 6.5rem);
  height: clamp(4.5rem, 9vw, 6.5rem);
  object-fit: contain;
  flex: 0 0 auto;
  transform: scale(1.22);
  transform-origin: center;
}

.brand-copy strong,
.brand-copy small,
.site-nav,
.nav-toggle,
.eyebrow,
.hero-kicker,
.route-card-label,
.chip,
.section-kicker,
.button,
.filter-label,
.stat-label,
.footer-title,
.footer-links,
.meta-label,
.detail-nav-link,
.notice,
.empty-state {
  font-family: "Noto Sans JP", "Hiragino Sans", sans-serif;
}

.brand-copy strong {
  font-family: "Noto Serif JP", "Hiragino Mincho ProN", serif;
  font-size: 1.28rem;
  font-weight: 700;
  line-height: 1.18;
  letter-spacing: 0.01em;
}

.brand-copy small {
  color: var(--text-soft);
  font-size: 0.78rem;
  line-height: 1.18;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 1.2rem;
  font-size: 0.92rem;
}

.site-nav a {
  position: relative;
  color: var(--text-muted);
}

.site-nav a.active,
.site-nav a:hover {
  color: var(--text);
  text-decoration: none;
}

.site-nav a.active::after,
.site-nav a:hover::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: -0.45rem;
  height: 2px;
  background: var(--accent-navy);
}

.nav-toggle {
  display: none;
  border: 1px solid var(--border);
  background: var(--surface);
  border-radius: var(--radius-pill);
  padding: 0.7rem 1rem;
}

.app-root {
  flex: 1;
  padding: 2rem 0 5rem;
}

.page-section + .page-section {
  margin-top: 2rem;
}

.hero {
  padding: 4rem 0 2.5rem;
}

.hero-panel {
  position: relative;
  overflow: hidden;
  border: 1px solid rgba(216, 204, 188, 0.9);
  border-radius: 32px;
  background:
    linear-gradient(135deg, rgba(255, 253, 252, 0.95), rgba(240, 233, 221, 0.94)),
    var(--surface);
  box-shadow: var(--shadow-soft);
  padding: clamp(2rem, 4vw, 4rem);
}

.hero-panel::before {
  content: "";
  position: absolute;
  inset: auto -4rem -5rem auto;
  width: 18rem;
  height: 18rem;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(29, 53, 87, 0.12), transparent 70%);
  pointer-events: none;
}

.hero-kicker,
.section-kicker,
.eyebrow,
.filter-label,
.meta-label,
.notice {
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-soft);
  font-size: 0.74rem;
}

.hero-kicker {
  margin: 0 0 0.08rem;
  line-height: 1.1;
}

.hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.6fr) minmax(280px, 0.9fr);
  gap: 2rem;
  align-items: end;
}

.hero-title,
.page-title {
  margin: 0.4rem 0 1rem;
  line-height: 1.15;
}

.hero-title {
  font-size: clamp(2.6rem, 5vw, 4.8rem);
  max-width: 12ch;
  margin-top: 0.08rem;
  margin-bottom: 0.3rem;
}

.page-title {
  font-size: clamp(2rem, 4vw, 3rem);
}

.hero-copy,
.page-intro,
.panel-copy {
  max-width: 60ch;
  color: var(--text-muted);
  font-size: 1rem;
}

.hero-actions,
.stack-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.85rem;
  margin-top: 1.75rem;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.45rem;
  min-height: 2.8rem;
  padding: 0.75rem 1.2rem;
  border-radius: 16px;
  border: 1px solid transparent;
  transition:
    transform var(--transition-soft),
    background var(--transition-soft),
    border-color var(--transition-soft),
    color var(--transition-soft);
}

.button:hover {
  transform: translateY(-1px);
  text-decoration: none;
}

.button-primary {
  color: var(--surface);
  background: var(--accent-navy);
}

.button-secondary {
  color: var(--text);
  background: var(--surface);
  border-color: var(--border);
}

.button-text {
  color: var(--accent-navy);
  padding-inline: 0;
}

.hero-stats {
  display: grid;
  gap: 1rem;
}

.stat-card,
.route-card,
.feature-card,
.category-card,
.card-tile,
.panel,
.detail-body,
.detail-side,
.quote-block,
.column-block,
.random-card,
.loading-state,
.empty-state {
  border: 1px solid rgba(216, 204, 188, 0.92);
  border-radius: var(--radius-card);
  background: rgba(255, 253, 252, 0.88);
  box-shadow: var(--shadow-soft);
}

.stat-card,
.route-card,
.feature-card,
.category-card,
.card-tile,
.panel,
.quote-block,
.column-block,
.random-card,
.loading-state,
.empty-state {
  padding: 1.25rem;
}

.stat-value {
  font-family: "IBM Plex Sans", "Noto Sans JP", sans-serif;
  font-size: 2rem;
  line-height: 1;
  margin-top: 0.35rem;
}

.section-header {
  display: flex;
  justify-content: space-between;
  align-items: end;
  gap: 1rem;
  margin-bottom: 1.3rem;
}

.section-title {
  margin: 0.35rem 0 0;
  font-size: 1.4rem;
}

.route-grid,
.feature-grid,
.category-grid,
.card-grid,
.guide-grid,
.svp-grid {
  display: grid;
  gap: 1rem;
}

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

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

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

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

.route-card,
.feature-card,
.category-card,
.card-tile,
.panel {
  position: relative;
  overflow: hidden;
}

.route-card::before,
.feature-card::before,
.category-card::before,
.card-tile::before,
.panel::before,
.detail-body::before,
.random-card::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 4px;
  background: var(--category-accent, var(--accent-navy));
  opacity: 0.8;
}

.route-card:hover,
.feature-card:hover,
.category-card:hover,
.card-tile:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-hover);
}

.route-card-label,
.chip {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  width: fit-content;
  border-radius: var(--radius-pill);
  padding: 0.35rem 0.8rem;
  background: rgba(240, 233, 221, 0.75);
  color: var(--text-muted);
  font-size: 0.78rem;
}

.route-card-title,
.feature-card-title,
.category-card-title,
.card-tile-title,
.panel-title,
.detail-title {
  margin: 0.9rem 0 0.75rem;
  line-height: 1.3;
}

.route-card-title,
.feature-card-title,
.category-card-title,
.panel-title {
  font-size: 1.25rem;
}

.card-tile-title,
.detail-title {
  font-size: 1.35rem;
}

.route-card p,
.feature-card p,
.category-card p,
.panel p,
.card-tile p,
.quote-block p,
.column-block p {
  margin: 0;
  color: var(--text-muted);
}

.inline-meta,
.card-meta,
.detail-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.55rem;
  align-items: center;
}

.chip-dot {
  width: 0.55rem;
  height: 0.55rem;
  border-radius: 50%;
  background: currentColor;
}

.page-header {
  margin-bottom: 1.8rem;
}

.filters {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr auto;
  gap: 1rem;
  align-items: end;
  margin-bottom: 1.5rem;
}

.field {
  display: grid;
  gap: 0.4rem;
}

.field input,
.field select {
  width: 100%;
  min-height: 3rem;
  border-radius: 14px;
  border: 1px solid var(--border);
  background: rgba(255, 253, 252, 0.92);
  padding: 0.85rem 1rem;
  color: var(--text);
}

.field input:focus,
.field select:focus,
.button:focus,
.nav-toggle:focus {
  outline: 2px solid var(--accent-navy);
  outline-offset: 2px;
}

.chip-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
  margin-top: 1rem;
}

.chip-button {
  border: 1px solid var(--border);
  background: rgba(255, 253, 252, 0.85);
  color: var(--text);
}

.chip-button.is-active {
  background: var(--accent-navy);
  color: var(--surface);
  border-color: var(--accent-navy);
}

.page-toolbar {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 1.25rem;
}

.results-meta {
  color: var(--text-soft);
  font-size: 0.92rem;
}

.detail-layout {
  display: grid;
  grid-template-columns: minmax(0, 1.45fr) minmax(280px, 0.8fr);
  gap: 1.5rem;
  align-items: start;
}

.detail-body,
.detail-side {
  position: relative;
  padding: clamp(1.25rem, 2vw, 2rem);
}

.detail-body {
  background:
    linear-gradient(180deg, rgba(255, 253, 252, 0.96), rgba(246, 241, 232, 0.95)),
    var(--surface);
}

.detail-side {
  border: 1px solid rgba(216, 204, 188, 0.92);
  border-radius: var(--radius-panel);
  background: rgba(240, 233, 221, 0.66);
  box-shadow: var(--shadow-soft);
}

.detail-side::before {
  content: "";
  position: absolute;
  left: 0;
  top: 1.2rem;
  bottom: 1.2rem;
  width: 2px;
  background: rgba(29, 53, 87, 0.25);
}

.detail-question {
  margin: 1.25rem 0 1.5rem;
  font-size: clamp(1.5rem, 2.6vw, 2.2rem);
  line-height: 1.55;
  max-width: 18ch;
}

.quote-block,
.column-block {
  margin-top: 1.1rem;
}

.quote-block {
  background: var(--quote-bg);
}

.quote-block p {
  font-size: 0.96rem;
}

.column-block p {
  font-size: 0.95rem;
}

.detail-illustration {
  margin-top: 1.5rem;
  padding-top: 1rem;
  border-top: 1px solid rgba(216, 204, 188, 0.8);
}

.detail-image {
  margin-top: 1rem;
  overflow: hidden;
  border-radius: 16px;
  border: 1px solid rgba(216, 204, 188, 0.85);
}

.detail-image img {
  width: 100%;
  object-fit: cover;
  background: var(--surface-strong);
}

.detail-nav {
  display: grid;
  gap: 0.9rem;
  margin-top: 1.25rem;
}

.detail-nav-link {
  display: block;
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 0.95rem 1rem;
  background: rgba(255, 253, 252, 0.8);
  color: var(--text);
}

.detail-nav-link small {
  display: block;
  margin-top: 0.25rem;
  color: var(--text-soft);
}

.random-card {
  max-width: 760px;
  margin: 0 auto;
  position: relative;
}

.random-card::after {
  content: "";
  position: absolute;
  inset: auto 1rem 1rem auto;
  width: 5rem;
  height: 5rem;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(29, 53, 87, 0.13), transparent 70%);
}

.notice {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.45rem 0.8rem;
  background: rgba(240, 233, 221, 0.8);
  border-radius: var(--radius-pill);
  margin-bottom: 0.9rem;
}

.empty-state,
.loading-state {
  text-align: center;
  padding: 3rem 1rem;
}

.site-footer {
  border-top: 1px solid rgba(216, 204, 188, 0.8);
  background: rgba(240, 233, 221, 0.55);
}

.footer-inner {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  padding: 1.6rem 0 2rem;
}

.footer-title {
  margin: 0 0 0.35rem;
  color: var(--text);
}

.footer-copy {
  margin: 0;
  color: var(--text-soft);
  max-width: 45ch;
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  align-content: start;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

@media (max-width: 960px) {
  .hero-grid,
  .detail-layout,
  .route-grid,
  .feature-grid,
  .guide-grid,
  .svp-grid,
  .category-grid,
  .card-grid,
  .filters,
  .footer-inner {
    grid-template-columns: 1fr;
    display: grid;
  }

  .footer-inner {
    gap: 1.25rem;
  }

  .site-nav {
    position: absolute;
    right: 1rem;
    top: calc(100% + 0.6rem);
    min-width: 13rem;
    display: none;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 0.4rem;
    border: 1px solid var(--border);
    border-radius: 18px;
    background: rgba(255, 253, 252, 0.98);
    box-shadow: var(--shadow-soft);
  }

  .site-nav.is-open {
    display: flex;
  }

  .site-nav a {
    padding: 0.8rem 0.9rem;
    border-radius: 14px;
  }

  .site-nav a.active::after,
  .site-nav a:hover::after {
    display: none;
  }

  .site-nav a.active,
  .site-nav a:hover {
    background: rgba(231, 238, 245, 0.82);
  }

  .nav-toggle {
    display: inline-flex;
    align-items: center;
    justify-content: center;
  }
}

@media (max-width: 640px) {
  body {
    line-height: 1.75;
  }

  .container {
    width: min(calc(100% - 1.25rem), var(--content-max));
  }

  .hero {
    padding-top: 2rem;
  }

  .hero-panel,
  .detail-body,
  .detail-side,
  .route-card,
  .feature-card,
  .category-card,
  .card-tile,
  .panel,
  .quote-block,
  .column-block,
  .random-card {
    padding: 1rem;
  }

  .detail-question {
    max-width: 100%;
  }

  .chip-row {
    overflow-x: auto;
    flex-wrap: nowrap;
    padding-bottom: 0.25rem;
  }

  .chip-row::-webkit-scrollbar {
    height: 0;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    animation: none !important;
    transition: none !important;
  }
}