:root {
  --paper: #f7f8f5;
  --ink: #26312f;
  --muted: #66736f;
  --line: #dce3dd;
  --sage: #78918a;
  --deep: #314b45;
  --white: #fff;
  --max: 1120px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: "Noto Sans JP", system-ui, sans-serif;
  line-height: 1.9;
  letter-spacing: 0;
}
a { color: inherit; text-decoration: none; }
img { display: block; width: 100%; height: auto; }

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 18px clamp(18px, 4vw, 54px);
  background: rgba(247,248,245,.86);
  border-bottom: 1px solid rgba(220,227,221,.75);
  backdrop-filter: blur(18px);
}
.logo { display: grid; gap: 0; font-family: "Noto Serif JP", serif; }
.logo span { font-size: 19px; letter-spacing: .12em; }
.logo small { color: var(--muted); font: 500 11px/1 "Cormorant Garamond", serif; letter-spacing: .22em; text-transform: uppercase; }
.nav { display: flex; align-items: center; gap: 22px; color: var(--muted); font-size: 13px; }
.nav a:hover { color: var(--ink); }
.nav__reserve {
  color: var(--white) !important;
  background: var(--deep);
  padding: 10px 18px;
  border-radius: 999px;
}
.menu { display: none; width: 42px; height: 42px; border: 1px solid var(--line); background: transparent; border-radius: 999px; }
.menu span { display: block; width: 18px; height: 1px; margin: 6px auto; background: var(--ink); }

.hero {
  max-width: 1440px;
  margin: 0 auto;
  min-height: calc(100vh - 76px);
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(360px, .85fr);
  align-items: stretch;
}
.hero__photo { margin: 0; min-height: 560px; }
.hero__photo img { height: 100%; object-fit: cover; }
.hero__copy {
  align-self: center;
  padding: clamp(40px, 7vw, 96px);
}
.hero__sub {
  margin: 0 0 24px;
  color: var(--sage);
  font: 600 12px/1 "Cormorant Garamond", serif;
  letter-spacing: .22em;
  text-transform: uppercase;
}
.hero h1 {
  margin: 0;
  font-family: "Noto Serif JP", serif;
  font-size: clamp(40px, 5.4vw, 82px);
  font-weight: 500;
  line-height: 1.18;
}
.hero__copy > p:not(.hero__sub) { max-width: 460px; margin: 28px 0 0; color: var(--muted); }
.hero__actions { display: flex; align-items: center; gap: 24px; margin-top: 36px; flex-wrap: wrap; }
.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 0 24px;
  border-radius: 999px;
  background: var(--deep);
  color: var(--white);
  font-size: 14px;
}
.button--line { background: transparent; color: var(--deep); border: 1px solid var(--deep); }
.text-link { color: var(--deep); border-bottom: 1px solid currentColor; font-size: 14px; }

.topics {
  max-width: var(--max);
  margin: 48px auto 0;
  padding: 0 24px;
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1px;
  background: var(--line);
}
.topics article { background: var(--paper); padding: 24px; }
.topics time { display: block; color: var(--sage); font: 600 13px/1 "Cormorant Garamond", serif; letter-spacing: .12em; }
.topics p { margin: 10px 0 0; font-size: 14px; color: var(--muted); }

.section { max-width: var(--max); margin: 0 auto; padding: 112px 24px 0; }
.section__head { display: grid; grid-template-columns: 180px 1fr; gap: 36px; align-items: start; margin-bottom: 42px; }
.section__head span {
  color: var(--sage);
  font: 600 13px/1 "Cormorant Garamond", serif;
  letter-spacing: .2em;
  text-transform: uppercase;
}
.section__head h2 { margin: 0; font-family: "Noto Serif JP", serif; font-size: clamp(30px, 4vw, 52px); font-weight: 500; line-height: 1.38; }
.concept__grid { display: grid; grid-template-columns: .9fr 1.1fr; gap: 64px; border-top: 1px solid var(--line); padding-top: 42px; }
.lead { margin: 0; font-family: "Noto Serif JP", serif; font-size: clamp(22px, 2.6vw, 34px); line-height: 1.75; }
.copy p { margin: 0 0 1.2em; color: var(--muted); }

.timeline { display: grid; grid-template-columns: repeat(4, 1fr); border-top: 1px solid var(--line); border-left: 1px solid var(--line); }
.timeline article { padding: 28px; border-right: 1px solid var(--line); border-bottom: 1px solid var(--line); background: rgba(255,255,255,.38); }
.timeline time { color: var(--sage); font: 600 18px/1 "Cormorant Garamond", serif; }
.timeline h3 { margin: 16px 0 8px; font-family: "Noto Serif JP", serif; font-weight: 500; }
.timeline p { margin: 0; color: var(--muted); font-size: 14px; }

.gallery { display: grid; grid-template-columns: 1.1fr .8fr .8fr; gap: 18px; }
.gallery figure { margin: 0; overflow: hidden; aspect-ratio: 4 / 3; }
.gallery figure:first-child { aspect-ratio: 3 / 2; }
.gallery img { height: 100%; object-fit: cover; }

.room-list { display: grid; gap: 18px; }
.room-list article {
  display: grid;
  grid-template-columns: 280px 1fr;
  gap: 28px;
  align-items: center;
  padding: 18px;
  background: var(--white);
  border: 1px solid var(--line);
}
.room-list img { aspect-ratio: 4 / 3; object-fit: cover; }
.room-list p { margin: 0; color: var(--sage); font: 600 12px/1 "Cormorant Garamond", serif; letter-spacing: .18em; text-transform: uppercase; }
.room-list h3 { margin: 8px 0; font-family: "Noto Serif JP", serif; font-size: 28px; font-weight: 500; }
.room-list span { color: var(--muted); }

.plan-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.plan-grid article { padding: 30px; background: var(--white); border: 1px solid var(--line); }
.plan-grid h3 { margin: 0 0 14px; font-family: "Noto Serif JP", serif; font-size: 22px; }
.plan-grid p { min-height: 80px; margin: 0; color: var(--muted); }
.plan-grid strong { display: block; margin-top: 20px; font-size: 24px; color: var(--deep); }
.note { margin: 18px 0 0; color: var(--muted); font-size: 13px; }

.options ul { list-style: none; padding: 0; margin: 0; display: grid; grid-template-columns: repeat(4, 1fr); border-top: 1px solid var(--line); border-left: 1px solid var(--line); }
.options li { padding: 20px; border-right: 1px solid var(--line); border-bottom: 1px solid var(--line); background: rgba(255,255,255,.42); }

.access__grid { display: grid; grid-template-columns: .9fr 1.1fr; gap: 32px; align-items: stretch; }
.access dl { margin: 0; display: grid; gap: 18px; }
.access dt { color: var(--sage); font-size: 12px; }
.access dd { margin: 4px 0 0; }
.access iframe { width: 100%; min-height: 360px; border: 0; filter: grayscale(.2) saturate(.8); }

.reserve {
  max-width: var(--max);
  margin: 112px auto 0;
  padding: 70px 24px;
  text-align: center;
  background: var(--deep);
  color: var(--white);
}
.reserve h2 { margin: 0; font-family: "Noto Serif JP", serif; font-size: clamp(30px, 4vw, 48px); font-weight: 500; }
.reserve p { max-width: 620px; margin: 18px auto 28px; color: rgba(255,255,255,.78); }
.reserve .button { background: var(--white); color: var(--deep); margin: 4px; }
.reserve .button--line { background: transparent; color: var(--white); border-color: rgba(255,255,255,.65); }
.footer { max-width: var(--max); margin: 0 auto; padding: 36px 24px 64px; display: flex; justify-content: space-between; color: var(--muted); font-size: 13px; }

@media (max-width: 900px) {
  .nav { position: fixed; inset: 70px 16px auto; display: none; flex-direction: column; align-items: stretch; padding: 22px; background: var(--white); border: 1px solid var(--line); box-shadow: 0 20px 50px rgba(0,0,0,.12); }
  .nav.is-open { display: flex; }
  .menu { display: block; }
  .hero { grid-template-columns: 1fr; }
  .hero__photo { min-height: 48vh; }
  .hero__copy { padding: 42px 24px 56px; }
  .topics, .concept__grid, .timeline, .gallery, .plan-grid, .access__grid { grid-template-columns: 1fr; }
  .section { padding-top: 78px; }
  .section__head { grid-template-columns: 1fr; gap: 14px; }
  .room-list article { grid-template-columns: 1fr; }
  .options ul { grid-template-columns: repeat(2, 1fr); }
  .footer { display: grid; gap: 8px; }
}