:root {
  --bg: #fbfaf7;
  --paper: #ffffff;
  --ink: #101211;
  --muted: #5f6662;
  --line: #e6e1d8;
  --soft: #f3f0ea;
  --green: #0f3d2e;
  --green-2: #1d5a43;
  --yellow: #d7b52c;
  --shadow: 0 24px 70px rgba(16, 18, 17, 0.08);
  --radius: 28px;
  --radius-sm: 16px;
  --max: 1180px;
  --reading: 760px;
  color-scheme: light;
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background:
    radial-gradient(circle at 10% 0%, rgba(15, 61, 46, 0.05), transparent 32rem),
    radial-gradient(circle at 90% 12%, rgba(215, 181, 44, 0.08), transparent 28rem),
    var(--bg);
  color: var(--ink);
  font-family: -apple-system, BlinkMacSystemFont, "Hiragino Sans", "Hiragino Kaku Gothic ProN", "Yu Gothic", "Yu Gothic UI", Meiryo, sans-serif;
  line-height: 1.8;
  letter-spacing: 0.02em;
}

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

a {
  color: inherit;
  text-decoration-thickness: 0.08em;
  text-underline-offset: 0.18em;
}

.skip-link {
  position: absolute;
  top: 12px;
  left: 12px;
  z-index: 100;
  padding: 10px 14px;
  border-radius: 999px;
  background: var(--ink);
  color: white;
  transform: translateY(-160%);
  transition: transform 160ms ease;
}

.skip-link:focus {
  transform: translateY(0);
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  backdrop-filter: blur(18px);
  background: rgba(251, 250, 247, 0.82);
  border-bottom: 1px solid rgba(230, 225, 216, 0.85);
}

.header-inner,
.footer-inner,
.article {
  width: min(var(--max), calc(100% - 32px));
  margin-inline: auto;
}

.header-inner {
  min-height: 74px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
}

.brand-mark {
  display: grid;
  place-items: center;
  width: 42px;
  height: 42px;
  border-radius: 14px;
  background: var(--green);
  color: white;
  font-weight: 800;
  box-shadow: 0 10px 28px rgba(15, 61, 46, 0.18);
}

.brand strong {
  display: block;
  font-size: 1rem;
  line-height: 1.1;
}

.brand small {
  display: none;
  color: var(--muted);
  font-size: 0.72rem;
  line-height: 1.2;
}

.site-nav {
  display: none;
  align-items: center;
  gap: 8px;
  color: var(--muted);
  font-size: 0.86rem;
}

.site-nav a {
  padding: 8px 10px;
  border-radius: 999px;
  text-decoration: none;
}

.site-nav a:hover,
.site-nav a:focus-visible {
  background: var(--soft);
  color: var(--ink);
}

.hero {
  padding: clamp(34px, 6vw, 86px) 0 clamp(44px, 7vw, 96px);
  display: grid;
  gap: 26px;
  align-items: center;
}

.eyebrow,
.section-kicker,
.number {
  margin: 0 0 10px;
  color: var(--green);
  font-weight: 800;
  font-size: 0.76rem;
  letter-spacing: 0.13em;
  text-transform: uppercase;
}

h1,
h2,
h3,
p {
  overflow-wrap: anywhere;
}

h1 {
  margin: 0;
  font-size: clamp(2.5rem, 13vw, 7.3rem);
  line-height: 0.94;
  letter-spacing: -0.08em;
  font-weight: 900;
}

h1::after {
  content: "";
  display: block;
  width: min(280px, 56vw);
  height: 12px;
  margin-top: 18px;
  background: linear-gradient(90deg, var(--yellow), rgba(215, 181, 44, 0.25));
  border-radius: 999px;
}

.lead {
  margin: 22px 0 0;
  max-width: 670px;
  color: #343936;
  font-size: clamp(1rem, 2.5vw, 1.18rem);
}

.tags {
  display: flex;
  flex-wrap: wrap;
  gap: 9px;
  margin-top: 22px;
}

.tags span {
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.72);
  color: var(--green);
  border-radius: 999px;
  padding: 8px 12px;
  font-weight: 700;
  font-size: 0.82rem;
}

.hero-visual,
.visual-card figure {
  margin: 0;
}

.hero-visual {
  padding: 8px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: rgba(255, 255, 255, 0.78);
  box-shadow: var(--shadow);
}

.hero-visual img,
.visual-card img {
  border-radius: calc(var(--radius) - 10px);
  border: 1px solid rgba(16, 18, 17, 0.08);
  background: #fff;
}

figcaption {
  padding: 12px 10px 2px;
  color: var(--muted);
  font-size: 0.82rem;
}

.section-narrow {
  max-width: var(--reading);
  margin-inline: auto;
}

.intro,
.closing,
.references {
  padding: clamp(34px, 7vw, 76px) 0;
}

.section-heading {
  max-width: var(--reading);
  margin: 0 auto clamp(24px, 5vw, 54px);
  text-align: left;
}

h2 {
  margin: 0 0 14px;
  font-size: clamp(1.72rem, 5.3vw, 3.1rem);
  line-height: 1.16;
  letter-spacing: -0.055em;
}

h3 {
  margin: 0 0 12px;
  font-size: clamp(1.35rem, 3.5vw, 2.08rem);
  line-height: 1.22;
  letter-spacing: -0.045em;
}

.section-narrow p,
.section-heading p,
.visual-text p,
.checklist p,
.references li,
.footer-inner p {
  color: var(--muted);
}

.section-narrow p,
.section-heading p,
.visual-text p {
  font-size: 1rem;
}

.theme-map {
  margin: 12px 0 clamp(46px, 8vw, 92px);
  padding: clamp(18px, 4vw, 34px);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background:
    linear-gradient(135deg, rgba(15, 61, 46, 0.06), transparent 50%),
    rgba(255, 255, 255, 0.78);
}

.map-card h2 {
  margin-bottom: 12px;
  font-size: clamp(1.4rem, 4vw, 2rem);
}

.map-card p {
  margin: 0;
  color: var(--muted);
}

.map-card strong {
  color: var(--ink);
  background: linear-gradient(transparent 62%, rgba(215, 181, 44, 0.34) 0);
}

.map-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
  margin-top: 22px;
}

.map-grid div {
  min-height: 104px;
  padding: 15px;
  border: 1px solid var(--line);
  border-radius: 18px;
  background: rgba(255, 255, 255, 0.76);
}

.map-grid span {
  display: inline-grid;
  place-items: center;
  width: 36px;
  height: 36px;
  border-radius: 999px;
  background: var(--green);
  color: white;
  font-weight: 900;
  font-size: 0.8rem;
}

.map-grid p {
  margin: 12px 0 0;
  color: #2d332f;
  font-weight: 800;
  line-height: 1.45;
}

.series {
  padding: clamp(24px, 5vw, 56px) 0 0;
}

.visual-card {
  position: relative;
  display: grid;
  gap: 18px;
  margin: 0 0 clamp(34px, 8vw, 88px);
  padding: clamp(12px, 3vw, 22px);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: rgba(255, 255, 255, 0.82);
  box-shadow: 0 18px 50px rgba(16, 18, 17, 0.055);
}

.visual-card::before {
  content: "";
  position: absolute;
  inset: auto 26px -1px;
  height: 3px;
  border-radius: 999px;
  background: linear-gradient(90deg, var(--green), var(--yellow), transparent);
  opacity: 0.48;
}

.visual-text {
  padding: 4px 2px 8px;
}

.visual-text .number {
  color: var(--yellow);
}

.action-section {
  margin: clamp(30px, 8vw, 90px) 0;
  padding: clamp(30px, 6vw, 74px) clamp(16px, 4vw, 46px);
  border-radius: var(--radius);
  background:
    radial-gradient(circle at 12% 12%, rgba(215, 181, 44, 0.12), transparent 28rem),
    linear-gradient(135deg, rgba(15, 61, 46, 0.06), rgba(255, 255, 255, 0.86));
  border: 1px solid var(--line);
}

.checklist {
  display: grid;
  gap: 12px;
  max-width: 900px;
  margin: 0 auto;
  padding: 0;
  list-style: none;
}

.checklist li {
  display: flex;
  gap: 14px;
  padding: 16px;
  border-radius: 20px;
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.86);
}

.check-icon {
  flex: 0 0 auto;
  display: grid;
  place-items: center;
  width: 34px;
  height: 34px;
  border-radius: 999px;
  background: var(--green);
  color: white;
  font-weight: 900;
}

.checklist strong {
  display: block;
  font-size: 1rem;
  line-height: 1.45;
}

.checklist p {
  margin: 4px 0 0;
  font-size: 0.92rem;
}

.closing {
  text-align: left;
}

.soft-cta {
  display: inline-flex;
  align-items: center;
  margin-top: 16px;
  padding: 12px 16px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: white;
  color: var(--green);
  font-weight: 800;
  text-decoration: none;
}

.soft-cta:hover,
.soft-cta:focus-visible {
  border-color: rgba(15, 61, 46, 0.35);
  box-shadow: 0 10px 30px rgba(15, 61, 46, 0.08);
}

.references {
  border-top: 1px solid var(--line);
}

.references ul {
  margin: 18px 0 0;
  padding-left: 1.2rem;
}

.references a {
  color: var(--green);
  font-weight: 700;
}

.site-footer {
  margin-top: clamp(40px, 8vw, 90px);
  padding: 42px 0 48px;
  border-top: 1px solid var(--line);
  background: #f4f1ea;
}

.footer-inner {
  display: grid;
  gap: 18px;
}

.footer-inner strong {
  display: block;
  font-size: 1.1rem;
}

.footer-inner p {
  margin: 6px 0 0;
  font-size: 0.9rem;
}

.disclaimer {
  max-width: 800px;
}

.copyright {
  color: #777f79;
}

@media (min-width: 700px) {
  .brand small {
    display: block;
  }

  .site-nav {
    display: flex;
  }

  .hero {
    grid-template-columns: minmax(0, 0.9fr) minmax(420px, 1.12fr);
  }

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

  .checklist li {
    padding: 20px;
  }
}

@media (min-width: 980px) {
  .header-inner,
  .footer-inner,
  .article {
    width: min(var(--max), calc(100% - 64px));
  }

  .visual-card {
    grid-template-columns: minmax(0, 1.35fr) minmax(300px, 0.65fr);
    align-items: center;
    gap: 30px;
  }

  .visual-card.reverse {
    grid-template-columns: minmax(300px, 0.65fr) minmax(0, 1.35fr);
  }

  .visual-card.reverse figure {
    grid-column: 2;
  }

  .visual-card.reverse .visual-text {
    grid-column: 1;
    grid-row: 1;
  }

  .visual-text {
    padding: 24px 16px;
  }

  .theme-map {
    display: grid;
    grid-template-columns: 0.85fr 1.15fr;
    gap: 24px;
    align-items: start;
  }

  .map-grid {
    margin-top: 0;
  }
}

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

  *,
  *::before,
  *::after {
    transition-duration: 0.001ms !important;
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
  }
}