/* さざね renewal 2026-07 — 「汀のラグジュアリー」
   昼の白（紙）と夜の紺（東京湾の夜景）で挟む構成。
   ink=墨紺 / sea=瑠璃紺1色のみ。明朝=Shippori Mincho、本文=Zen Kaku Gothic New */

:root {
  --paper: #FCFCFA;
  --paper-warm: #F5F4EF;
  --night: #141F2E;
  --night-soft: #1D2B3E;
  --ink: #212B36;
  --ink-soft: #5A6673;
  --ink-faint: #8B95A0;
  --on-night: #E9ECEF;
  --on-night-soft: #A8B4C2;
  --sea: #2B527C;
  --sea-deep: #1F3D5E;
  --hairline: #E4E3DC;
  --hairline-night: rgba(255,255,255,0.14);
  --mincho: "Shippori Mincho", "Hiragino Mincho ProN", "Yu Mincho", serif;
  --gothic: "Zen Kaku Gothic New", "Hiragino Sans", "Yu Gothic", sans-serif;
  --pad: clamp(20px, 4vw, 48px);
}

* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  background: var(--paper); color: var(--ink);
  font-family: var(--gothic); font-size: 15px; line-height: 2.0;
  letter-spacing: 0.04em; -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
ul, ol { list-style: none; }

/* ───── ヘッダー ───── */
.site-header {
  position: fixed; inset: 0 0 auto 0; z-index: 100;
  display: flex; align-items: center; gap: 24px;
  padding: 0 clamp(16px, 2.5vw, 32px);
  height: 72px;
  background: rgba(20, 31, 46, 0.55);
  backdrop-filter: blur(10px); -webkit-backdrop-filter: blur(10px);
  transition: background 0.35s ease;
}
.site-header.solid { background: rgba(20, 31, 46, 0.92); }
.header-logo img { height: 40px; width: auto; }
.header-nav { margin-left: auto; display: flex; align-items: center; gap: clamp(12px, 1.6vw, 26px); }
.header-nav a {
  color: var(--on-night); font-size: 13px; letter-spacing: 0.12em;
  padding: 6px 0; border-bottom: 1px solid transparent; transition: border-color 0.25s;
}
.header-nav a:hover { border-bottom-color: var(--on-night); }
.header-cta {
  display: inline-flex; flex-direction: column; align-items: center; justify-content: center;
  background: var(--paper); color: var(--night);
  padding: 9px 22px; line-height: 1.5; transition: opacity 0.25s;
}
.header-cta:hover { opacity: 0.85; }
.header-cta b { font-size: 13.5px; letter-spacing: 0.14em; font-weight: 700; }
.header-cta span { font-size: 9.5px; letter-spacing: 0.08em; color: var(--sea-deep); }
.menu-toggle { display: none; }

/* モバイルメニュー */
@media (max-width: 900px) {
  .header-nav {
    position: fixed; inset: 0; background: var(--night);
    flex-direction: column; justify-content: center; gap: 26px;
    opacity: 0; pointer-events: none; transition: opacity 0.3s ease;
  }
  .header-nav.open { opacity: 1; pointer-events: auto; }
  .header-nav a { font-size: 16px; }
  .menu-toggle {
    display: block; margin-left: auto; z-index: 110;
    background: none; border: none; cursor: pointer;
    width: 44px; height: 44px; position: relative;
  }
  .menu-toggle span {
    position: absolute; left: 10px; right: 10px; height: 1.5px; background: var(--on-night);
    transition: transform 0.3s, opacity 0.3s;
  }
  .menu-toggle span:nth-child(1) { top: 16px; }
  .menu-toggle span:nth-child(2) { top: 22px; }
  .menu-toggle span:nth-child(3) { top: 28px; }
  .menu-toggle.open span:nth-child(1) { transform: translateY(6px) rotate(45deg); }
  .menu-toggle.open span:nth-child(2) { opacity: 0; }
  .menu-toggle.open span:nth-child(3) { transform: translateY(-6px) rotate(-45deg); }
  .header-cta { display: none; }
}

/* モバイル固定予約バー */
.sp-reserve-bar {
  display: none; position: fixed; inset: auto 0 0 0; z-index: 90;
  background: rgba(20,31,46,0.95); backdrop-filter: blur(8px);
  padding: 10px 12px calc(10px + env(safe-area-inset-bottom));
}
.sp-reserve-bar .inner { display: flex; gap: 8px; }
.sp-reserve-bar a {
  flex: 1; text-align: center; padding: 11px 4px; font-size: 12.5px; letter-spacing: 0.06em;
  line-height: 1.4;
}
.sp-reserve-bar .primary { background: var(--paper); color: var(--night); font-weight: 700; }
.sp-reserve-bar .secondary { border: 1px solid var(--hairline-night); color: var(--on-night); }
@media (max-width: 900px) { .sp-reserve-bar { display: block; } body { padding-bottom: 64px; } }

/* ───── ヒーロー ───── */
.hero { position: relative; height: 100svh; min-height: 560px; overflow: hidden; background: var(--night); }
.hero-slides, .hero-slides li { position: absolute; inset: 0; }
.hero-slides li { opacity: 0; transition: opacity 2.2s ease; }
.hero-slides li.current { opacity: 1; }
.hero-slides img { width: 100%; height: 100%; object-fit: cover; }
.hero::after {
  content: ""; position: absolute; inset: 0;
  background: linear-gradient(180deg, rgba(20,31,46,0.42) 0%, rgba(20,31,46,0.08) 40%, rgba(20,31,46,0.55) 100%);
}
.hero-copy {
  position: absolute; z-index: 2; inset: auto auto 18% clamp(24px, 6vw, 96px);
  color: #fff;
}
.hero-copy .catch {
  font-family: var(--mincho); font-weight: 500;
  font-size: clamp(26px, 4.2vw, 44px); line-height: 1.9; letter-spacing: 0.18em;
  text-shadow: 0 2px 24px rgba(10,16,24,0.45);
}
.hero-copy .sub {
  margin-top: 18px; font-size: clamp(11.5px, 1.3vw, 13.5px); letter-spacing: 0.22em; color: rgba(255,255,255,0.85);
}
.hero-foot {
  position: absolute; z-index: 2; inset: auto clamp(24px, 6vw, 96px) 32px auto;
  display: flex; align-items: center; gap: 22px;
  color: rgba(255,255,255,0.85); font-size: 12px; letter-spacing: 0.1em;
}
.hero-foot a { border-bottom: 1px solid rgba(255,255,255,0.4); padding-bottom: 2px; }
.scroll-cue {
  position: absolute; z-index: 2; left: 50%; bottom: 26px; transform: translateX(-50%);
  color: rgba(255,255,255,0.7); font-size: 10px; letter-spacing: 0.3em; writing-mode: vertical-rl;
}
.scroll-cue::after {
  content: ""; display: block; width: 1px; height: 44px; margin: 10px auto 0;
  background: linear-gradient(180deg, rgba(255,255,255,0.8), transparent);
  animation: cue 2.2s ease infinite;
}
@keyframes cue { 0% { transform: scaleY(0); transform-origin: top; } 55% { transform: scaleY(1); transform-origin: top; } 100% { transform: scaleY(1); opacity: 0; } }
@media (prefers-reduced-motion: reduce) {
  .scroll-cue::after { animation: none; }
  .hero-slides li { transition: none; }
  .fx { transition: none !important; transform: none !important; opacity: 1 !important; }
}

/* ───── 下層ページヒーロー ───── */
.page-hero { position: relative; height: 52svh; min-height: 380px; overflow: hidden; background: var(--night); }
.page-hero img { width: 100%; height: 100%; object-fit: cover; opacity: 0.82; }
.page-hero::after { content: ""; position: absolute; inset: 0; background: linear-gradient(180deg, rgba(20,31,46,0.5), rgba(20,31,46,0.18) 55%, rgba(20,31,46,0.4)); }
.page-hero .titles { position: absolute; z-index: 2; inset: auto auto 15% clamp(24px, 6vw, 96px); color: #fff; }
.page-hero .en { font-size: 12px; letter-spacing: 0.32em; text-transform: uppercase; color: rgba(255,255,255,0.8); }
.page-hero h1 { font-family: var(--mincho); font-weight: 500; font-size: clamp(24px, 3.4vw, 36px); letter-spacing: 0.14em; line-height: 1.8; margin-top: 10px; text-shadow: 0 2px 20px rgba(10,16,24,0.4); }

/* パンくず */
.breadcrumb { max-width: 1120px; margin: 0 auto; padding: 18px var(--pad) 0; font-size: 11px; letter-spacing: 0.08em; color: var(--ink-faint); }
.breadcrumb a { color: var(--ink-soft); border-bottom: 1px solid var(--hairline); }
.breadcrumb span::before { content: "／"; margin: 0 6px; color: var(--hairline); }

/* ───── セクション共通 ───── */
main { display: block; }
.sec { padding: clamp(64px, 9vw, 120px) var(--pad); }
.sec-inner { max-width: 1120px; margin: 0 auto; }
.sec-inner.narrow { max-width: 760px; }
.sec-label { font-size: 11.5px; letter-spacing: 0.34em; text-transform: uppercase; color: var(--sea); }
.sec-title {
  font-family: var(--mincho); font-weight: 500;
  font-size: clamp(21px, 2.7vw, 30px); line-height: 1.95; letter-spacing: 0.1em;
  margin: 14px 0 0; text-wrap: balance;
}
.sec-lede { margin-top: 26px; max-width: 640px; color: var(--ink-soft); }
.sec.night { background: var(--night); color: var(--on-night); }
.sec.night .sec-title { color: #fff; }
.sec.night .sec-lede { color: var(--on-night-soft); }
.sec.warm { background: var(--paper-warm); }
.center { text-align: center; }
.center .sec-lede { margin-left: auto; margin-right: auto; }

/* スクロールリビール */
.fx { opacity: 0; transform: translateY(22px); transition: opacity 0.9s ease, transform 0.9s ease; }
.fx.on { opacity: 1; transform: none; }

/* ボタン */
.btn {
  display: inline-block; padding: 14px 44px; font-size: 13.5px; letter-spacing: 0.18em;
  border: 1px solid var(--ink); color: var(--ink); background: transparent;
  transition: background 0.3s, color 0.3s; text-align: center;
}
.btn:hover { background: var(--ink); color: var(--paper); }
.btn.solid { background: var(--night); color: #fff; border-color: var(--night); }
.btn.solid:hover { background: var(--sea-deep); border-color: var(--sea-deep); }
.btn.ghost-night { border-color: var(--hairline-night); color: var(--on-night); }
.btn.ghost-night:hover { background: rgba(255,255,255,0.1); color: #fff; }
.btn.paper { background: var(--paper); color: var(--night); border-color: var(--paper); font-weight: 700; }
.btn.paper:hover { background: transparent; color: var(--on-night); border-color: var(--on-night); }
.btn-note { display: block; margin-top: 10px; font-size: 11px; letter-spacing: 0.1em; color: var(--ink-faint); }

/* ───── メディア＋テキスト交互 ───── */
.media-split { display: grid; grid-template-columns: 1.15fr 1fr; gap: clamp(28px, 4.5vw, 64px); align-items: center; }
.media-split.rev { grid-template-columns: 1fr 1.15fr; }
.media-split.rev .m-img { order: 2; }
.m-img img { width: 100%; height: auto; aspect-ratio: 3 / 2; object-fit: cover; }
.m-body .sec-title { font-size: clamp(19px, 2.2vw, 25px); }
.m-body p { margin-top: 22px; color: var(--ink-soft); }
.m-body .btn { margin-top: 30px; }
@media (max-width: 820px) {
  .media-split, .media-split.rev { grid-template-columns: 1fr; }
  .media-split.rev .m-img { order: 0; }
}

/* ───── 客室カード ───── */
.room-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: clamp(20px, 3vw, 36px); margin-top: 48px; }
@media (max-width: 720px) { .room-grid { grid-template-columns: 1fr; } }
.room-card { background: var(--paper); border: 1px solid var(--hairline); display: flex; flex-direction: column; }
.sec.night .room-card { background: var(--night-soft); border-color: var(--hairline-night); }
.room-card .thumb { overflow: hidden; }
.room-card .thumb img { width: 100%; aspect-ratio: 16 / 10; object-fit: cover; transition: transform 1.2s ease; }
.room-card a:hover .thumb img { transform: scale(1.045); }
.room-card .body { padding: 22px 24px 26px; display: flex; flex-direction: column; flex: 1; }
.room-card .type-en { font-size: 11px; letter-spacing: 0.26em; text-transform: uppercase; color: var(--sea); }
.sec.night .room-card .type-en { color: #9DB6D4; }
.room-card h3 { font-family: var(--mincho); font-weight: 500; font-size: 20px; letter-spacing: 0.12em; margin-top: 6px; }
.room-card .spec { font-size: 12px; letter-spacing: 0.1em; color: var(--ink-faint); margin-top: 4px; }
.sec.night .room-card .spec { color: var(--on-night-soft); }
.room-card .desc { font-size: 13px; line-height: 1.9; color: var(--ink-soft); margin-top: 12px; }
.sec.night .room-card .desc { color: var(--on-night-soft); }
.room-card .links { margin-top: auto; padding-top: 18px; display: flex; gap: 10px; flex-wrap: wrap; }
.room-card .links a {
  font-size: 12px; letter-spacing: 0.12em; padding: 9px 18px; border: 1px solid currentColor;
  transition: opacity 0.25s;
}
.room-card .links a:hover { opacity: 0.6; }
.room-card .links .reserve { background: var(--paper); color: var(--night); border-color: var(--paper); font-weight: 700; }
.sec:not(.night) .room-card .links .reserve { background: var(--night); color: #fff; border-color: var(--night); }

/* ───── 過ごし方タイムライン ───── */
.day-flow { margin-top: 56px; position: relative; }
.day-flow::before { content: ""; position: absolute; left: 96px; top: 8px; bottom: 8px; width: 1px; background: var(--hairline-night); }
.day-item { display: grid; grid-template-columns: 96px 1fr; gap: 28px; padding: 22px 0; position: relative; }
.day-item::before {
  content: ""; position: absolute; left: 92.5px; top: 34px; width: 8px; height: 8px; border-radius: 50%;
  background: var(--on-night); box-shadow: 0 0 0 5px var(--night);
}
.day-item .time { font-family: var(--mincho); font-size: 17px; letter-spacing: 0.1em; color: #fff; text-align: right; padding-right: 26px; font-variant-numeric: tabular-nums; }
.day-item h3 { font-family: var(--mincho); font-weight: 500; font-size: 17px; letter-spacing: 0.14em; color: #fff; }
.day-item p { font-size: 13px; color: var(--on-night-soft); margin-top: 6px; max-width: 560px; }
@media (max-width: 640px) {
  .day-flow::before { left: 74px; }
  .day-item { grid-template-columns: 74px 1fr; gap: 20px; }
  .day-item::before { left: 70.5px; }
  .day-item .time { font-size: 14px; padding-right: 18px; }
}

/* ───── 予約帯 ───── */
.reserve-band { text-align: center; }
.reserve-band .lead { font-family: var(--mincho); font-size: clamp(19px, 2.4vw, 26px); letter-spacing: 0.14em; line-height: 2; color: #fff; }
.reserve-band .best-rate { display: inline-block; margin-top: 14px; padding: 5px 18px; border: 1px solid var(--hairline-night); font-size: 11.5px; letter-spacing: 0.22em; color: var(--on-night-soft); }
.reserve-choices { display: flex; gap: 18px; justify-content: center; margin-top: 38px; flex-wrap: wrap; }
.reserve-choices .btn { min-width: 260px; }
.reserve-sub { margin-top: 26px; display: flex; gap: 26px; justify-content: center; flex-wrap: wrap; font-size: 12px; letter-spacing: 0.1em; }
.reserve-sub a { color: var(--on-night-soft); border-bottom: 1px solid var(--hairline-night); padding-bottom: 2px; transition: color 0.25s; }
.reserve-sub a:hover { color: #fff; }
.reserve-tel { margin-top: 30px; color: var(--on-night-soft); font-size: 12.5px; letter-spacing: 0.12em; }
.reserve-tel a { font-family: var(--mincho); font-size: 21px; color: #fff; letter-spacing: 0.14em; }

/* ───── FAQ ───── */
.faq-list { margin-top: 40px; border-top: 1px solid var(--hairline); }
.faq-item { border-bottom: 1px solid var(--hairline); padding: 26px 8px; }
.faq-item .q { display: grid; grid-template-columns: 34px 1fr; gap: 14px; font-weight: 700; letter-spacing: 0.08em; }
.faq-item .q::before { content: "Q"; font-family: var(--mincho); font-size: 19px; color: var(--sea); line-height: 1.6; }
.faq-item .a { display: grid; grid-template-columns: 34px 1fr; gap: 14px; margin-top: 14px; color: var(--ink-soft); }
.faq-item .a::before { content: "A"; font-family: var(--mincho); font-size: 19px; color: var(--ink-faint); line-height: 1.6; }
.faq-item .a p + p { margin-top: 10px; }

/* ───── 汎用definition表 ───── */
.info-table { margin-top: 36px; border-top: 1px solid var(--hairline); width: 100%; }
.info-table > div { display: grid; grid-template-columns: 200px 1fr; border-bottom: 1px solid var(--hairline); }
.info-table dt { padding: 18px 12px; font-size: 13px; letter-spacing: 0.14em; color: var(--ink-soft); background: var(--paper-warm); }
.info-table dd { padding: 18px 20px; font-size: 13.5px; line-height: 1.9; }
@media (max-width: 640px) {
  .info-table > div { grid-template-columns: 1fr; }
  .info-table dt { padding: 12px 12px 4px; background: transparent; color: var(--sea); font-size: 12px; }
  .info-table dd { padding: 0 12px 14px; }
}

/* ───── ギャラリー ───── */
.photo-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 10px; margin-top: 44px; }
.photo-grid img { width: 100%; aspect-ratio: 1 / 1; object-fit: cover; }
.photo-grid.wide3 { grid-template-columns: repeat(3, 1fr); }
.photo-grid.wide3 img { aspect-ratio: 4 / 3; }
@media (max-width: 720px) { .photo-grid, .photo-grid.wide3 { grid-template-columns: repeat(2, 1fr); } }

/* ───── 観光カード ───── */
.spot-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: clamp(18px, 2.5vw, 30px); margin-top: 48px; }
@media (max-width: 900px) { .spot-grid { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 600px) { .spot-grid { grid-template-columns: 1fr; } }
.spot-card { border: 1px solid var(--hairline); background: var(--paper); display: flex; flex-direction: column; }
.spot-card img { width: 100%; aspect-ratio: 3 / 2; object-fit: cover; }
.spot-card .body { padding: 20px 22px 24px; display: flex; flex-direction: column; flex: 1; }
.spot-card h3 { font-family: var(--mincho); font-weight: 500; font-size: 17.5px; letter-spacing: 0.1em; line-height: 1.7; }
.spot-card p { font-size: 13px; line-height: 1.9; color: var(--ink-soft); margin-top: 10px; }
.spot-card .meta { margin-top: auto; padding-top: 14px; font-size: 12px; color: var(--ink-faint); letter-spacing: 0.06em; }
.spot-card .meta a { color: var(--sea); border-bottom: 1px solid currentColor; }

/* ───── エステ・メニュー ───── */
.menu-block { margin-top: 44px; border-top: 1px solid var(--hairline); padding-top: 34px; }
.menu-block h3 { font-family: var(--mincho); font-weight: 500; font-size: 20px; letter-spacing: 0.12em; }
.menu-block > p { margin-top: 14px; color: var(--ink-soft); max-width: 680px; }
.price-rows { margin-top: 18px; max-width: 460px; }
.price-rows .row { display: flex; justify-content: space-between; align-items: baseline; padding: 9px 4px; border-bottom: 1px dotted var(--hairline); font-size: 14px; }
.price-rows .row .min { color: var(--ink-soft); letter-spacing: 0.1em; }
.price-rows .row .yen { font-family: var(--mincho); font-size: 16px; letter-spacing: 0.06em; font-variant-numeric: tabular-nums; }
.menu-sub { margin-top: 26px; }
.menu-sub h4 { font-size: 15px; font-weight: 700; letter-spacing: 0.1em; }
.menu-sub p { font-size: 13px; color: var(--ink-soft); margin-top: 6px; max-width: 680px; }

/* ───── 姉妹館 ───── */
.group-sec { background: var(--paper-warm); }
.group-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 14px; margin-top: 44px; }
@media (max-width: 900px) { .group-grid { grid-template-columns: repeat(3, 1fr); } }
@media (max-width: 600px) { .group-grid { grid-template-columns: repeat(2, 1fr); } }
.group-card { background: var(--paper); border: 1px solid var(--hairline); }
.group-card img { width: 100%; aspect-ratio: 16 / 9; object-fit: cover; }
.group-card h3 { font-size: 12.5px; font-weight: 500; letter-spacing: 0.1em; padding: 12px 14px; }
.group-card a { display: block; transition: opacity 0.25s; }
.group-card a:hover { opacity: 0.75; }

/* ───── フッター ───── */
.site-footer { background: var(--night); color: var(--on-night); padding: 72px var(--pad) 40px; }
.footer-inner { max-width: 1120px; margin: 0 auto; }
.footer-top { display: grid; grid-template-columns: 1fr auto; gap: 40px; align-items: start; }
@media (max-width: 760px) { .footer-top { grid-template-columns: 1fr; } }
.footer-id img { height: 52px; width: auto; }
.footer-id .tagline { margin-top: 18px; font-size: 12.5px; letter-spacing: 0.14em; color: var(--on-night-soft); }
.footer-id address { font-style: normal; margin-top: 12px; font-size: 13px; line-height: 2.1; color: var(--on-night-soft); }
.footer-id address a { color: var(--on-night); }
.footer-sns { display: flex; gap: 14px; margin-top: 20px; }
.footer-sns img { width: 34px; height: 34px; }
.footer-sns a { transition: opacity 0.25s; }
.footer-sns a:hover { opacity: 0.7; }
.footer-menu { display: grid; gap: 10px; font-size: 12.5px; letter-spacing: 0.1em; }
.footer-menu a { color: var(--on-night-soft); transition: color 0.25s; }
.footer-menu a:hover { color: #fff; }
.footer-bottom { margin-top: 56px; padding-top: 24px; border-top: 1px solid var(--hairline-night); display: flex; justify-content: space-between; gap: 16px; flex-wrap: wrap; font-size: 11px; letter-spacing: 0.1em; color: var(--on-night-soft); }
.footer-bottom a { color: var(--on-night); border-bottom: 1px solid var(--hairline-night); }

/* エステサロン「OCEAN」ページ：本文直後に置く施術風景の写真3点（2026-08 追加） */
.esthe-photos {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  list-style: none;
  margin: 0;
  padding: 0;
}
.esthe-photos li { flex: 1 1 0; min-width: 0; }
.esthe-photos img { display: block; width: 100%; height: auto; }
@media screen and (max-width: 767px) {
  .esthe-photos { gap: 10px; }
  .esthe-photos li { flex: 1 1 100%; }
}

/* ひとり旅セクションの定義リスト（2026-08 追加） */
.solo-list { margin-top: 36px; text-align: left; }
.solo-list > div {
  display: flex;
  gap: 20px;
  padding: 16px 4px;
  border-bottom: 1px solid var(--line, #ddd3ba);
}
.solo-list > div:first-child { border-top: 1px solid var(--line, #ddd3ba); }
.solo-list dt {
  flex: 0 0 3em;
  font-size: 14px;
  letter-spacing: .2em;
  color: var(--accent, #9e2b22);
}
.solo-list dd { margin: 0; font-size: 13.5px; line-height: 1.95; }
@media screen and (max-width: 600px) {
  .solo-list > div { flex-direction: column; gap: 6px; }
}