:root {
  --navy: #1A2A3A;
  --white: #FFFFFF;
  --gold: #C8A96A;
  --earth: #8A4B2A;
  --paper: #f7f2e9;
  --ink: #12202c;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: "Noto Serif JP", "Hiragino Mincho ProN", "Yu Mincho", serif;
  line-height: 1.75;
}

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

a:hover {
  text-decoration: underline;
}

.container {
  max-width: 1080px;
  margin: 0 auto;
  padding: 0 18px;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(26, 42, 58, 0.92);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid rgba(200, 169, 106, 0.25);
}

.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  padding: 12px 0;
}

.site-header__brand {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.site-header__title {
  font-family: ui-sans-serif, system-ui, -apple-system, "Segoe UI", Arial, sans-serif;
  font-weight: 800;
  letter-spacing: 0.04em;
  color: var(--white);
  font-size: 16px;
  margin: 0;
}

.site-header__subtitle {
  font-family: ui-sans-serif, system-ui, -apple-system, "Segoe UI", Arial, sans-serif;
  font-size: 12px;
  color: rgba(255, 255, 255, 0.78);
  margin: 0;
}

.site-nav__toggle {
  display: none;
  font-family: ui-sans-serif, system-ui, -apple-system, "Segoe UI", Arial, sans-serif;
  background: transparent;
  color: var(--white);
  border: 1px solid rgba(200, 169, 106, 0.55);
  border-radius: 10px;
  padding: 8px 10px;
}

.site-nav__list {
  display: flex;
  align-items: center;
  gap: 14px;
  list-style: none;
  padding: 0;
  margin: 0;
  font-family: ui-sans-serif, system-ui, -apple-system, "Segoe UI", Arial, sans-serif;
  font-weight: 700;
  font-size: 13px;
  letter-spacing: 0.02em;
}

.site-nav__link {
  color: rgba(255, 255, 255, 0.92);
  padding: 8px 10px;
  border-radius: 10px;
}

.site-nav__link--active {
  background: rgba(200, 169, 106, 0.14);
  color: var(--white);
  box-shadow: inset 0 0 0 1px rgba(200, 169, 106, 0.4);
}

.site-footer {
  margin-top: 48px;
  padding: 28px 0;
  background: var(--navy);
  color: rgba(255, 255, 255, 0.86);
  border-top: 1px solid rgba(200, 169, 106, 0.25);
}

.site-footer__inner {
  display: grid;
  grid-template-columns: 1fr;
  gap: 10px;
}

.site-footer__small {
  font-family: ui-sans-serif, system-ui, -apple-system, "Segoe UI", Arial, sans-serif;
  font-size: 12px;
  opacity: 0.9;
}

.hero {
  position: relative;
  background: var(--navy);
  color: var(--white);
}

.hero__media {
  position: absolute;
  inset: 0;
  background-image: url("/images/placeholder.jpg");
  background-size: cover;
  background-position: center;
  opacity: 0.35;
}

.hero__overlay {
  position: absolute;
  inset: 0;
  background: radial-gradient(1200px 600px at 10% 10%, rgba(200, 169, 106, 0.16), transparent 60%),
    linear-gradient(180deg, rgba(26, 42, 58, 0.85), rgba(26, 42, 58, 0.95));
}

.hero__inner {
  position: relative;
  padding: 64px 0 54px;
}

.hero__kicker {
  font-family: ui-sans-serif, system-ui, -apple-system, "Segoe UI", Arial, sans-serif;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  font-weight: 800;
  color: rgba(255, 255, 255, 0.78);
  font-size: 12px;
  margin: 0 0 10px;
}

.hero__title {
  margin: 0;
  font-size: 34px;
  line-height: 1.25;
  letter-spacing: 0.02em;
}

.hero__lead {
  margin: 14px 0 0;
  max-width: 62ch;
  font-size: 16px;
  color: rgba(255, 255, 255, 0.86);
}

.hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 22px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 14px;
  border-radius: 12px;
  border: 1px solid rgba(255, 255, 255, 0.22);
  background: rgba(255, 255, 255, 0.08);
  color: var(--white);
  font-family: ui-sans-serif, system-ui, -apple-system, "Segoe UI", Arial, sans-serif;
  font-weight: 800;
  letter-spacing: 0.02em;
}

.btn--gold {
  border-color: rgba(200, 169, 106, 0.65);
  background: rgba(200, 169, 106, 0.16);
}

.section {
  padding: 34px 0;
}

.section__title {
  margin: 0 0 12px;
  font-size: 24px;
  letter-spacing: 0.02em;
}

.section__lede {
  margin: 0;
  max-width: 80ch;
  color: rgba(18, 32, 44, 0.86);
}

.grid {
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  gap: 14px;
}

.card {
  background: rgba(255, 255, 255, 0.72);
  border: 1px solid rgba(26, 42, 58, 0.12);
  border-radius: 16px;
  box-shadow: 0 12px 26px rgba(18, 32, 44, 0.06);
  overflow: hidden;
}

.card__body {
  padding: 16px;
}

.card__title {
  margin: 0 0 8px;
  font-size: 18px;
}

.card__text {
  margin: 0;
  color: rgba(18, 32, 44, 0.86);
}

.card__meta {
  font-family: ui-sans-serif, system-ui, -apple-system, "Segoe UI", Arial, sans-serif;
  font-weight: 800;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  font-size: 11px;
  color: var(--earth);
}

.media {
  width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  display: block;
}

.figure-placeholder {
  border-radius: 14px;
  border: 1px dashed rgba(26, 42, 58, 0.25);
  background: rgba(26, 42, 58, 0.04);
  height: 180px;
}

.gallery {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
  margin-top: 14px;
}

.gallery__item {
  border-radius: 16px;
  overflow: hidden;
  border: 1px solid rgba(26, 42, 58, 0.12);
}

.timeline {
  margin: 18px 0 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 12px;
}

.timeline__item {
  background: rgba(255, 255, 255, 0.72);
  border: 1px solid rgba(26, 42, 58, 0.12);
  border-radius: 16px;
  padding: 14px 16px;
  display: grid;
  grid-template-columns: 86px 1fr;
  gap: 14px;
}

.timeline__year {
  font-family: ui-sans-serif, system-ui, -apple-system, "Segoe UI", Arial, sans-serif;
  font-weight: 900;
  color: var(--gold);
  letter-spacing: 0.06em;
}

.timeline__label {
  margin: 0;
}

.map-embed {
  width: 100%;
  height: 220px;
  border: 1px dashed rgba(26, 42, 58, 0.25);
  border-radius: 14px;
  background: rgba(26, 42, 58, 0.03);
}

.form {
  display: grid;
  gap: 12px;
  margin-top: 18px;
}

.form__row {
  display: grid;
  gap: 6px;
}

.form__label {
  font-family: ui-sans-serif, system-ui, -apple-system, "Segoe UI", Arial, sans-serif;
  font-weight: 800;
  font-size: 13px;
  letter-spacing: 0.02em;
}

.form__input,
.form__textarea {
  border: 1px solid rgba(26, 42, 58, 0.22);
  border-radius: 12px;
  padding: 10px 12px;
  font-family: inherit;
  background: rgba(255, 255, 255, 0.8);
}

.form__textarea {
  min-height: 120px;
  resize: vertical;
}

@media (max-width: 860px) {
  .site-nav__toggle { display: inline-flex; }
  .site-nav__list {
    position: absolute;
    right: 18px;
    top: 58px;
    flex-direction: column;
    align-items: stretch;
    gap: 6px;
    padding: 10px;
    background: rgba(26, 42, 58, 0.98);
    border: 1px solid rgba(200, 169, 106, 0.25);
    border-radius: 16px;
    min-width: 240px;
    display: none;
  }
  .site-nav__list--open { display: flex; }
  .gallery { grid-template-columns: 1fr; }
  .timeline__item { grid-template-columns: 1fr; }
}