:root {
  --bg: #f6f1e8;
  --paper: #fffdf8;
  --ink: #22211f;
  --muted: #6d665d;
  --line: #ded4c4;
  --accent: #8f4f3b;
  --accent-dark: #5e3428;
  --sage: #6d7b68;
  --blue: #344f64;
  --shadow: 0 22px 70px rgba(65, 47, 33, 0.12);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: "Zen Kaku Gothic New", system-ui, sans-serif;
  line-height: 1.9;
}

a {
  color: inherit;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  justify-content: space-between;
  gap: 24px;
  align-items: center;
  padding: 18px clamp(20px, 4vw, 56px);
  background: rgba(255, 253, 248, 0.88);
  border-bottom: 1px solid rgba(222, 212, 196, 0.8);
  backdrop-filter: blur(16px);
}

.brand {
  font-family: "Noto Serif JP", serif;
  font-weight: 700;
  text-decoration: none;
}

nav {
  display: flex;
  gap: 18px;
  color: var(--muted);
  font-size: 14px;
}

nav a {
  text-decoration: none;
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(300px, 0.85fr);
  gap: clamp(28px, 5vw, 70px);
  align-items: end;
  min-height: calc(100vh - 70px);
  padding: clamp(64px, 8vw, 110px) clamp(20px, 6vw, 86px) 56px;
  background:
    linear-gradient(115deg, rgba(246, 241, 232, 0.68), rgba(246, 241, 232, 0.92)),
    url("https://images.unsplash.com/photo-1497366754035-f200968a6e72?auto=format&fit=crop&w=1800&q=82") center / cover;
}

.hero h1,
.section-heading h2,
.cta h2 {
  margin: 0;
  font-family: "Noto Serif JP", serif;
  font-weight: 700;
  line-height: 1.35;
  letter-spacing: 0;
}

.hero h1 {
  max-width: 760px;
  font-size: clamp(42px, 7vw, 86px);
}

.eyebrow {
  margin: 0 0 14px;
  color: var(--accent);
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.lead {
  margin-top: 30px;
  font-size: clamp(18px, 2.1vw, 24px);
  color: #393530;
}

.hero__copy > p:not(.eyebrow) {
  max-width: 730px;
}

.hero__actions,
.cta__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 34px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 12px 20px;
  border: 1px solid var(--accent);
  text-decoration: none;
  font-weight: 700;
  transition: transform 0.2s ease, background 0.2s ease;
}

.button:hover {
  transform: translateY(-2px);
}

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

.button--ghost {
  background: rgba(255, 253, 248, 0.78);
  color: var(--accent-dark);
}

.hero__panel {
  background: rgba(255, 253, 248, 0.9);
  border: 1px solid rgba(222, 212, 196, 0.9);
  box-shadow: var(--shadow);
  padding: clamp(24px, 4vw, 38px);
}

.hero__panel p {
  margin: 0 0 18px;
  font-weight: 700;
}

.hero__panel ul {
  margin: 0;
  padding-left: 20px;
  color: var(--muted);
}

.notice {
  padding: 18px clamp(20px, 6vw, 86px);
  background: #2d2a26;
  color: #f7efe3;
  font-size: 13px;
}

.notice p {
  max-width: 1100px;
  margin: 0 auto;
}

.section {
  padding: clamp(70px, 9vw, 120px) clamp(20px, 6vw, 86px);
}

.section-heading {
  max-width: 760px;
  margin-bottom: 34px;
}

.section-heading h2,
.cta h2 {
  font-size: clamp(30px, 4vw, 52px);
}

.section-heading p:not(.eyebrow) {
  color: var(--muted);
}

.change-grid,
.featured-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 16px;
}

.change-grid article,
.featured-card {
  background: var(--paper);
  border: 1px solid var(--line);
  box-shadow: 0 12px 40px rgba(65, 47, 33, 0.08);
  padding: 24px;
}

.change-grid span {
  color: var(--sage);
  font-family: "Noto Serif JP", serif;
  font-weight: 700;
}

.change-grid h3,
.featured-card h3 {
  margin: 12px 0;
  line-height: 1.55;
}

.change-grid p,
.featured-card p {
  color: var(--muted);
}

.section--ink {
  background: #2d2a26;
  color: var(--paper);
}

.section--ink .section-heading p,
.section--ink .featured-card p {
  color: #d9cbbb;
}

.section--ink .featured-card {
  background: #3a352f;
  border-color: #51483f;
}

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

.featured-card a {
  color: #f4c09e;
  font-weight: 700;
}

.theme-list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  border-top: 1px solid var(--line);
}

.theme-list a {
  display: grid;
  grid-template-columns: 0.9fr 1.2fr;
  gap: 20px;
  padding: 24px 0;
  border-bottom: 1px solid var(--line);
  text-decoration: none;
}

.theme-list span {
  color: var(--muted);
}

.voices {
  background: #fbf8f1;
}

.category-title {
  margin: 60px 0 18px;
  color: var(--blue);
  font-family: "Noto Serif JP", serif;
  font-size: clamp(24px, 3vw, 34px);
}

.accordion {
  display: grid;
  gap: 12px;
}

details {
  background: var(--paper);
  border: 1px solid var(--line);
  box-shadow: 0 10px 28px rgba(65, 47, 33, 0.06);
}

summary {
  cursor: pointer;
  display: grid;
  grid-template-columns: 220px 1fr;
  gap: 20px;
  align-items: center;
  padding: 22px 24px;
  list-style: none;
}

summary::-webkit-details-marker {
  display: none;
}

summary span {
  color: var(--muted);
  font-size: 14px;
}

summary strong {
  font-family: "Noto Serif JP", serif;
  font-size: 19px;
  line-height: 1.6;
}

.story {
  max-width: 820px;
  padding: 0 24px 30px calc(244px + 24px);
}

.story p {
  margin: 0 0 16px;
}

.story-lead {
  color: var(--accent-dark);
  font-weight: 700;
}

.story ul {
  margin: 0;
  padding-left: 20px;
}

.cta {
  padding: clamp(74px, 10vw, 130px) clamp(20px, 6vw, 86px);
  background: var(--blue);
  color: white;
}

.cta p {
  max-width: 780px;
  color: #e6edf0;
}

.cta .button--ghost {
  background: transparent;
  border-color: rgba(255, 255, 255, 0.55);
  color: white;
}

footer {
  display: flex;
  justify-content: space-between;
  gap: 20px;
  padding: 30px clamp(20px, 6vw, 86px);
  background: #1f1d1a;
  color: #f4ede4;
}

footer p {
  margin: 0;
  font-family: "Noto Serif JP", serif;
}

@media (max-width: 980px) {
  .hero,
  .change-grid,
  .featured-grid,
  .theme-list {
    grid-template-columns: 1fr;
  }

  .hero {
    min-height: auto;
  }

  .theme-list a {
    grid-template-columns: 1fr;
    gap: 6px;
  }
}

@media (max-width: 720px) {
  .site-header {
    align-items: flex-start;
    flex-direction: column;
  }

  nav {
    width: 100%;
    overflow-x: auto;
    padding-bottom: 4px;
    white-space: nowrap;
  }

  .hero {
    padding-top: 52px;
  }

  .hero h1 {
    font-size: 40px;
  }

  summary {
    grid-template-columns: 1fr;
    gap: 6px;
  }

  .story {
    padding: 0 20px 26px;
  }

  footer {
    flex-direction: column;
  }
}