:root {
  --ink: #1f1b16;
  --accent: #b13a2f;
  --accent-soft: #d77d6c;
  --sand: #f6f0e3;
  --stone: #e7ded0;
  --white: #ffffff;
  --shadow: 0 20px 40px rgba(31, 27, 22, 0.15);
}

* {
  box-sizing: border-box;
}

body {
  font-family: "Noto Serif JP", serif;
  color: var(--ink);
  background: var(--sand);
  line-height: 1.55;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  background: url("./assets/oldmap.jpg") center / cover no-repeat;
  opacity: 0.08;
  pointer-events: none;
  z-index: -1;
}

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

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

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  background: rgba(246, 240, 227, 0.95);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid rgba(31, 27, 22, 0.1);
}

.site-header__inner {
  max-width: 1100px;
  margin: 0 auto;
  padding: 10px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.site-logo {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 14px;
  letter-spacing: 0.03em;
}

.site-logo img {
  width: 48px;
}

.site-year {
  font-size: 16px;
  color: var(--accent);
}

.site-nav {
  display: flex;
  gap: 20px;
  font-size: 14px;
}

.site-nav a {
  padding-bottom: 4px;
  border-bottom: 2px solid transparent;
  transition: border-color 0.2s ease;
}

.site-nav a:hover {
  border-color: var(--accent);
}

.hero {
  position: relative;
  min-height: 50vh;
  display: flex;
  align-items: center;
  color: var(--white);
  overflow: hidden;
}

.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background: url("./assets/top3.png") center / cover no-repeat;
  filter: saturate(1.1);
  z-index: -2;
}

.hero::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(120deg, rgba(17, 16, 13, 0.75), rgba(88, 43, 36, 0.55));
  z-index: -1;
}

.hero__inner {
  max-width: 1100px;
  margin: 0 auto;
  padding: 64px 24px;
}

.hero__content {
  max-width: 650px;
}

.hero__eyebrow {
  font-size: 14px;
  letter-spacing: 0.3em;
  text-transform: uppercase;
  margin-bottom: 16px;
}

.hero h1 {
  font-size: clamp(28px, 4vw, 46px);
  line-height: 1.3;
  margin-bottom: 12px;
}

.hero__meta {
  font-size: 16px;
  background: rgba(255, 255, 255, 0.12);
  padding: 10px 16px;
  border-radius: 999px;
  display: inline-block;
}

.hero__cta {
  margin-top: 12px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 12px 22px;
  border-radius: 999px;
  font-size: 14px;
  letter-spacing: 0.05em;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.btn--primary {
  background: var(--accent);
  color: var(--white);
  box-shadow: 0 16px 30px rgba(177, 58, 47, 0.35);
}

.btn--primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 20px 40px rgba(177, 58, 47, 0.4);
}

.section {
  padding: 52px 24px;
}

.section--alt {
  background: var(--stone);
}

.section__inner {
  max-width: 1000px;
  margin: 0 auto;
}

.section__head {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 24px;
  margin-bottom: 22px;
  flex-wrap: wrap;
}

.section__head h2 {
  font-size: 28px;
}

.section__head p {
  color: rgba(31, 27, 22, 0.7);
  font-size: 15px;
}

.news-list {
  display: grid;
  gap: 14px;
}

.news-list li {
  background: var(--white);
  padding: 16px 20px;
  border-radius: 16px;
  box-shadow: var(--shadow);
  display: flex;
  gap: 16px;
  align-items: baseline;
}

.news-list time {
  font-size: 14px;
  color: var(--accent);
  white-space: nowrap;
}

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

.overview div {
  display: grid;
  grid-template-columns: 140px 1fr;
  gap: 14px;
  padding: 12px 0;
  border-bottom: 1px solid rgba(31, 27, 22, 0.15);
}

.overview dt {
  font-weight: 600;
}

.doc-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 16px;
}

.doc-card {
  background: var(--white);
  border-radius: 18px;
  padding: 18px;
  box-shadow: var(--shadow);
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.doc-card h3 {
  font-size: 18px;
}

.doc-card p {
  color: rgba(31, 27, 22, 0.7);
}

.doc-tag {
  align-self: flex-start;
  background: var(--accent-soft);
  color: var(--white);
  padding: 4px 10px;
  border-radius: 999px;
  font-size: 12px;
  letter-spacing: 0.08em;
}

.partner-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: 18px;
  align-items: stretch;
}

.partner-grid li {
  background: var(--white);
  border-radius: 16px;
  padding: 16px;
  box-shadow: var(--shadow);
  text-align: center;
  display: grid;
  gap: 10px;
  align-content: start;
}

.partner-grid img {
  width: 100%;
  height: 80px;
  object-fit: contain;
}

.partner-grid p {
  font-size: 14px;
}


.site-footer {
  background: #1f1b16;
  color: var(--white);
  padding: 28px 24px;
}

.site-footer__inner {
  max-width: 1000px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.footer-brand {
  display: flex;
  align-items: center;
  gap: 16px;
}

.footer-brand img {
  width: 52px;
}

.footer-logo {
  width: 110px;
  height: auto;
}

.footer-small {
  font-size: 12px;
  opacity: 0.7;
}

.footer-copy {
  font-size: 12px;
  opacity: 0.7;
}

@media (max-width: 900px) {
  .site-header__inner {
    flex-direction: column;
    align-items: flex-start;
  }

  .site-nav {
    flex-wrap: wrap;
  }

  .news-list li {
    flex-direction: column;
    align-items: flex-start;
  }

  .overview div {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 600px) {
  .site-logo {
    font-size: 13px;
  }

  .site-logo img {
    width: 48px;
  }

  .site-nav {
    gap: 14px;
    font-size: 13px;
  }

  .hero__inner {
    padding: 54px 20px;
  }

  .section {
    padding: 44px 20px;
  }
}