@charset "utf-8";
/* =========================================================
   湯宿 霧ヶ淵(架空) — 共通スタイル
   外部フォント・外部CSS・外部画像を一切読み込まない。
   色は「時刻」で動く。--sky 系の変数を JS が書き換える。
   ========================================================= */

:root{
  --serif:"游明朝","Yu Mincho",YuMincho,"Hiragino Mincho ProN","ヒラギノ明朝 ProN W3","MS PMincho",serif;
  --sans:"游ゴシック体","Yu Gothic",YuGothic,"Hiragino Kaku Gothic ProN","ヒラギノ角ゴ ProN W3",Meiryo,system-ui,sans-serif;

  --ink:#1c2026;          /* 本文の墨 */
  --ink-soft:#5a626e;     /* 補助文字 */
  --paper:#f6f3ec;        /* 和紙の地 */
  --paper-2:#efeadf;      /* 一段沈めた地 */
  --line:#d8d0c0;         /* 罫 */
  --indigo:#243447;       /* 藍鼠 */
  --indigo-d:#161f2b;     /* 濃藍 */
  --amber:#c98b3c;        /* 行灯の琥珀 */
  --amber-l:#e0ab5f;
  --moss:#5d6b53;         /* 苔 */

  /* JS が時刻に応じて書き換える(既定は「朝」) */
  --sky-top:#8fa6bd;
  --sky-bottom:#dfe6e6;
  --glow:#e7d6b4;

  --maxw:1080px;
  --gut:clamp(18px,5vw,40px);
}

*,*::before,*::after{box-sizing:border-box}

html{scroll-behavior:smooth}
body{
  margin:0;
  font-family:var(--sans);
  color:var(--ink);
  background:var(--paper);
  line-height:1.9;
  font-size:16px;
  letter-spacing:.04em;
  overflow-x:hidden;
  -webkit-text-size-adjust:100%;
}
img,svg,canvas{max-width:100%;display:block}
a{color:inherit}

h1,h2,h3,h4{font-family:var(--serif);font-weight:500;letter-spacing:.1em;line-height:1.5;margin:0}
p{margin:0 0 1.2em}

.wrap{width:100%;max-width:var(--maxw);margin-inline:auto;padding-inline:var(--gut)}
.narrow{max-width:760px}
.vh{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap}

/* ---------- 見出しの型 ---------- */
.sec{padding:clamp(56px,9vw,104px) 0}
.sec--tint{background:var(--paper-2)}
.sec--dark{background:var(--indigo);color:#e8e4da}
.sec--dark .lead,.sec--dark .sub{color:#b9c2cd}

.eyebrow{
  font-family:var(--serif);font-size:.68rem;letter-spacing:.4em;
  color:var(--amber);margin:0 0 1.1em;display:block;
}
.sec--dark .eyebrow{color:var(--amber-l)}
.h-sec{font-size:clamp(1.35rem,3.4vw,2.05rem);margin:0 0 .8em}
.lead{color:var(--ink-soft);font-size:.94rem;max-width:44em}
.sub{color:var(--ink-soft);font-size:.85rem}

.rule{height:1px;background:var(--line);border:0;margin:0}

/* ---------- ヘッダ ---------- */
.hd{
  position:fixed;inset:0 0 auto 0;z-index:60;
  display:flex;align-items:center;justify-content:space-between;
  gap:16px;padding:14px var(--gut);
  background:rgba(246,243,236,0);
  border-bottom:1px solid transparent;
  transition:background .45s ease,border-color .45s ease,backdrop-filter .45s ease;
}
.hd.is-solid{
  background:rgba(246,243,236,.94);
  border-bottom-color:var(--line);
  backdrop-filter:saturate(140%) blur(8px);
}
.hd__logo{display:flex;align-items:center;gap:10px;text-decoration:none;color:#fff;transition:color .45s ease}
.hd.is-solid .hd__logo{color:var(--ink)}
.hd__logo svg{width:30px;height:30px;flex:none}
.hd__name{font-family:var(--serif);font-size:1rem;letter-spacing:.24em;white-space:nowrap}
.hd__name small{display:block;font-size:.54rem;letter-spacing:.34em;opacity:.75;font-family:var(--sans)}

.nav{display:flex;align-items:center;gap:clamp(14px,2.4vw,30px)}
.nav a{
  text-decoration:none;font-size:.8rem;letter-spacing:.16em;color:#fff;
  padding:6px 0;border-bottom:1px solid transparent;transition:color .45s ease,border-color .25s ease;
}
.hd.is-solid .nav a{color:var(--ink)}
.nav a:hover,.nav a[aria-current="page"]{border-bottom-color:var(--amber)}
.nav .btn-res{
  border:1px solid currentColor;border-radius:2px;padding:8px 18px;border-bottom-width:1px;
}
.nav .btn-res:hover{background:var(--amber);border-color:var(--amber);color:#fff}

.burger{display:none;width:44px;height:44px;border:1px solid rgba(255,255,255,.5);background:transparent;border-radius:2px;padding:0;cursor:pointer}
.hd.is-solid .burger{border-color:var(--line)}
.burger span{display:block;width:20px;height:1px;background:#fff;margin:5px auto;transition:background .45s ease,transform .3s ease,opacity .3s ease}
.hd.is-solid .burger span{background:var(--ink)}
.burger[aria-expanded="true"] span:nth-child(1){transform:translateY(6px) rotate(45deg)}
.burger[aria-expanded="true"] span:nth-child(2){opacity:0}
.burger[aria-expanded="true"] span:nth-child(3){transform:translateY(-6px) rotate(-45deg)}

@media (max-width:820px){
  .burger{display:block}
  .nav{
    position:fixed;inset:60px 0 auto 0;flex-direction:column;align-items:stretch;gap:0;
    background:rgba(246,243,236,.985);border-bottom:1px solid var(--line);
    padding:8px var(--gut) 22px;transform-origin:top;
    display:none;
  }
  .nav.is-open{display:flex}
  .nav a{color:var(--ink);padding:14px 2px;border-bottom:1px solid var(--line)}
  .nav .btn-res{margin-top:14px;text-align:center;border:1px solid var(--ink)}
}

/* ---------- ヒーロー ---------- */
.hero{position:relative;min-height:100svh;display:grid;place-items:center;overflow:hidden;background:var(--indigo-d)}
.hero__cv{position:absolute;inset:0;width:100%;height:100%}
.hero__veil{position:absolute;inset:0;background:linear-gradient(to bottom,rgba(10,14,20,.42) 0%,rgba(10,14,20,0) 34%,rgba(10,14,20,.12) 62%,rgba(10,14,20,.55) 100%);pointer-events:none}
.hero__in{position:relative;text-align:center;color:#fff;padding:96px var(--gut) 120px}
.hero__mark{width:64px;margin:0 auto 26px;opacity:.92}
.hero h1{font-size:clamp(1.9rem,6.4vw,3.5rem);letter-spacing:.24em;text-indent:.24em;margin:0 0 .5em;text-shadow:0 2px 30px rgba(0,0,0,.45)}
.hero__sub{font-size:clamp(.8rem,2.2vw,.98rem);letter-spacing:.3em;text-indent:.3em;margin:0;color:#e6e0d2;text-shadow:0 1px 14px rgba(0,0,0,.6)}
.hero__time{
  position:absolute;left:50%;transform:translateX(-50%);bottom:26px;
  display:flex;gap:14px;align-items:center;color:#fff;font-size:.64rem;letter-spacing:.3em;
  text-shadow:0 1px 10px rgba(0,0,0,.7);
}
.hero__time i{display:block;width:26px;height:1px;background:rgba(255,255,255,.55)}
.hero__scroll{position:absolute;left:50%;bottom:78px;transform:translateX(-50%);width:1px;height:46px;background:linear-gradient(to bottom,rgba(255,255,255,0),rgba(255,255,255,.85));animation:drop 2.6s ease-in-out infinite}
@keyframes drop{0%{opacity:0;transform:translate(-50%,-14px)}40%{opacity:1}100%{opacity:0;transform:translate(-50%,14px)}}

.motion-btn{
  position:absolute;right:var(--gut);bottom:22px;z-index:5;
  background:rgba(255,255,255,.14);color:#fff;border:1px solid rgba(255,255,255,.6);
  font-family:var(--sans);font-size:.7rem;letter-spacing:.18em;padding:10px 16px;border-radius:2px;cursor:pointer;
}
.motion-btn[hidden]{display:none}

/* ---------- 縦書きの引き ---------- */
.tate{
  writing-mode:vertical-rl;font-family:var(--serif);
  font-size:clamp(1rem,2.6vw,1.35rem);letter-spacing:.34em;line-height:2.2;
  margin:0 auto;max-height:19em;
}
@media (max-width:700px){
  .tate{writing-mode:horizontal-tb;text-align:center;letter-spacing:.18em;line-height:2.2;max-height:none}
}

/* ---------- 3D 館内図 ---------- */
.plan3d{position:relative;background:var(--indigo-d);color:#e8e4da;overflow:clip}
.plan3d__sticky{position:sticky;top:0;height:100svh;display:grid;place-items:center;overflow:hidden}
.plan3d__cv{position:absolute;inset:0;width:100%;height:100%}
.plan3d__fallback{position:absolute;inset:0;display:grid;place-items:center;padding:var(--gut)}
.plan3d__cap{position:relative;text-align:center;max-width:30em;padding:0 var(--gut);pointer-events:none}
.plan3d__cap .eyebrow{color:var(--amber-l)}
.plan3d__cap h2{font-size:clamp(1.3rem,3.6vw,2rem);margin:0 0 .5em;text-shadow:0 2px 20px rgba(0,0,0,.6)}
.plan3d__cap p{font-size:.86rem;color:#c4ccd6;margin:0;text-shadow:0 1px 12px rgba(0,0,0,.7)}
.plan3d__steps{position:relative}
.plan3d__step{height:100svh}
.plan3d__legend{
  position:absolute;left:var(--gut);bottom:26px;font-size:.66rem;letter-spacing:.2em;
  color:#9fb0c2;pointer-events:none;
}
.plan3d__legend b{color:var(--amber-l);font-weight:400}
.plan3d__prog{position:absolute;right:var(--gut);top:50%;transform:translateY(-50%);width:1px;height:140px;background:rgba(255,255,255,.18)}
.plan3d__prog i{position:absolute;left:-2px;width:5px;height:5px;border-radius:50%;background:var(--amber-l);top:0;transition:top .12s linear}

/* ---------- カード ---------- */
.grid{display:grid;gap:clamp(18px,3vw,30px)}
.grid--3{grid-template-columns:repeat(3,1fr)}
.grid--2{grid-template-columns:repeat(2,1fr)}
.grid--4{grid-template-columns:repeat(4,1fr)}
@media (max-width:900px){.grid--3,.grid--4{grid-template-columns:repeat(2,1fr)}}
@media (max-width:620px){.grid--2,.grid--3,.grid--4{grid-template-columns:1fr}}

.card{
  display:block;text-decoration:none;color:inherit;background:#fff;
  border:1px solid var(--line);border-radius:2px;overflow:hidden;
  transition:transform .35s ease,box-shadow .35s ease,border-color .35s ease;
}
a.card:hover{transform:translateY(-4px);box-shadow:0 14px 34px rgba(28,32,38,.13);border-color:var(--amber)}
.card__fig{aspect-ratio:16/11;background:var(--indigo-d);overflow:hidden}
.card__fig svg{width:100%;height:100%}
.card__body{padding:20px 22px 24px}
.card__no{font-family:var(--serif);font-size:.62rem;letter-spacing:.34em;color:var(--amber);display:block;margin-bottom:.9em}
.card__body h3{font-size:1.02rem;margin:0 0 .45em}
.card__meta{font-size:.7rem;letter-spacing:.14em;color:var(--ink-soft);margin:0 0 .9em}
.card__body p{font-size:.83rem;color:var(--ink-soft);margin:0 0 1em}
.card__more{font-size:.72rem;letter-spacing:.2em;color:var(--amber)}
.card__more::after{content:" →"}

/* ---------- 表 ---------- */
.tbl{width:100%;border-collapse:collapse;font-size:.85rem}
.tbl th,.tbl td{border-bottom:1px solid var(--line);padding:13px 10px;text-align:left;vertical-align:top}
.tbl th{width:12em;font-weight:500;color:var(--ink-soft);font-family:var(--serif);letter-spacing:.12em}
.sec--dark .tbl th,.sec--dark .tbl td{border-bottom-color:rgba(255,255,255,.16)}
.sec--dark .tbl th{color:#a9b4c1}
.tbl--rows th{width:auto}
.scrollx{overflow-x:auto;-webkit-overflow-scrolling:touch}

/* ---------- 部屋・湯・献立の節 ---------- */
.entry{padding:clamp(44px,7vw,86px) 0;border-bottom:1px solid var(--line)}
.entry:last-of-type{border-bottom:0}
.entry__grid{display:grid;grid-template-columns:1fr 1fr;gap:clamp(22px,4vw,54px);align-items:center}
.entry:nth-of-type(even) .entry__fig{order:2}
@media (max-width:820px){
  .entry__grid{grid-template-columns:1fr}
  .entry:nth-of-type(even) .entry__fig{order:0}
}
.entry__fig{background:var(--indigo-d);border-radius:2px;overflow:hidden;aspect-ratio:4/3}
.entry__fig svg{width:100%;height:100%}
.entry h3{font-size:clamp(1.15rem,2.8vw,1.5rem);margin:0 0 .4em}
.entry__kana{font-size:.66rem;letter-spacing:.3em;color:var(--amber);display:block;margin-bottom:1em}

.spec{list-style:none;margin:1.4em 0 0;padding:0;font-size:.8rem;color:var(--ink-soft)}
.spec li{display:flex;gap:12px;padding:7px 0;border-bottom:1px dotted var(--line)}
.spec b{flex:none;width:6.5em;font-weight:500;color:var(--ink)}

/* ---------- 帯 ---------- */
.band{background:var(--indigo);color:#e8e4da;text-align:center;padding:clamp(46px,7vw,80px) 0}
.band h2{font-size:clamp(1.2rem,3vw,1.7rem);margin:0 0 .6em}
.band p{color:#b9c2cd;font-size:.85rem}
.btn{
  display:inline-block;text-decoration:none;font-size:.8rem;letter-spacing:.2em;
  padding:14px 34px;border:1px solid var(--amber);color:var(--amber-l);border-radius:2px;
  transition:background .3s ease,color .3s ease;
}
.btn:hover{background:var(--amber);color:#fff}
.btn--ink{border-color:var(--ink);color:var(--ink)}
.btn--ink:hover{background:var(--ink);color:var(--paper)}

/* ---------- 年表 ---------- */
.chrono{list-style:none;margin:0;padding:0;border-left:1px solid var(--line);max-width:46em}
.chrono li{position:relative;padding:0 0 30px 26px}
.chrono li::before{content:"";position:absolute;left:-4px;top:11px;width:7px;height:7px;border-radius:50%;background:var(--amber)}
.chrono time{display:block;font-family:var(--serif);font-size:.74rem;letter-spacing:.24em;color:var(--amber)}
.chrono p{margin:.2em 0 0;font-size:.86rem;color:var(--ink-soft)}

/* ---------- フォーム ---------- */
.form{display:grid;gap:18px;max-width:640px}
.form label{display:block;font-size:.76rem;letter-spacing:.16em;color:var(--ink-soft);margin-bottom:6px}
.form input,.form select,.form textarea{
  width:100%;font-family:var(--sans);font-size:.9rem;color:var(--ink);
  background:#fff;border:1px solid var(--line);border-radius:2px;padding:12px 13px;
}
.form input:focus,.form select:focus,.form textarea:focus{outline:2px solid var(--amber);outline-offset:1px}
.form .note{font-size:.74rem;color:var(--ink-soft);background:var(--paper-2);border:1px dashed var(--line);padding:12px 14px;border-radius:2px}
.form button{
  justify-self:start;font-family:var(--sans);font-size:.8rem;letter-spacing:.2em;
  padding:14px 36px;border:1px solid var(--ink);background:transparent;color:var(--ink);
  border-radius:2px;cursor:pointer;transition:background .3s ease,color .3s ease;
}
.form button:hover{background:var(--ink);color:var(--paper)}
.form__row{display:grid;grid-template-columns:1fr 1fr;gap:18px}
@media (max-width:620px){.form__row{grid-template-columns:1fr}}

/* ---------- FAQ ---------- */
.faq{border-top:1px solid var(--line);max-width:52em}
.faq details{border-bottom:1px solid var(--line)}
.faq summary{
  cursor:pointer;padding:17px 34px 17px 0;position:relative;
  font-family:var(--serif);font-size:.95rem;letter-spacing:.08em;list-style:none;
}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";position:absolute;right:6px;top:15px;color:var(--amber);font-size:1.1rem}
.faq details[open] summary::after{content:"−"}
.faq .a{padding:0 0 18px;font-size:.85rem;color:var(--ink-soft)}

/* ---------- ページ見出し ---------- */
.phead{position:relative;padding:clamp(120px,17vw,190px) 0 clamp(40px,6vw,70px);background:var(--indigo-d);color:#fff;overflow:hidden}
.phead__cv{position:absolute;inset:0;width:100%;height:100%;opacity:.85}
.phead__in{position:relative}
.phead h1{font-size:clamp(1.5rem,4.6vw,2.5rem);letter-spacing:.2em;margin:0 0 .3em}
.phead p{font-size:.78rem;letter-spacing:.28em;color:#c4ccd6;margin:0}
.crumb{position:relative;font-size:.68rem;letter-spacing:.16em;color:#9fb0c2;margin:0 0 1.4em}
.crumb a{color:#c4ccd6;text-decoration:none}
.crumb a:hover{color:#fff;text-decoration:underline}

/* ---------- 出現 ---------- */
.rise{opacity:0;transform:translateY(22px);transition:opacity .8s ease,transform .8s ease}
.rise.is-in{opacity:1;transform:none}

/* ---------- フッタ ---------- */
.ft{background:var(--indigo-d);color:#9fb0c2;padding:clamp(48px,7vw,76px) 0 30px;font-size:.8rem}
.ft__top{display:grid;grid-template-columns:1.4fr 1fr 1fr;gap:34px;padding-bottom:34px;border-bottom:1px solid rgba(255,255,255,.14)}
@media (max-width:820px){.ft__top{grid-template-columns:1fr 1fr}}
@media (max-width:560px){.ft__top{grid-template-columns:1fr}}
.ft h4{font-size:.72rem;letter-spacing:.28em;color:#e8e4da;margin:0 0 1.2em}
.ft ul{list-style:none;margin:0;padding:0}
.ft li{margin-bottom:.7em}
.ft a{color:#9fb0c2;text-decoration:none}
.ft a:hover{color:var(--amber-l);text-decoration:underline}
.ft__brand{display:flex;align-items:center;gap:12px;margin-bottom:1.1em;color:#e8e4da}
.ft__brand svg{width:34px;height:34px}
.ft__brand span{font-family:var(--serif);letter-spacing:.24em;font-size:.95rem}
.ft__mock{
  margin-top:26px;padding:16px 18px;border:1px dashed rgba(255,255,255,.3);
  border-radius:2px;font-size:.74rem;line-height:1.85;color:#b9c2cd;
}
.ft__mock b{color:var(--amber-l);font-weight:500}
.ft__copy{margin-top:22px;font-size:.68rem;letter-spacing:.1em;color:#6f7f90}

/* ---------- 動きを止める ---------- */
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{animation-duration:.001ms !important;animation-iteration-count:1 !important;transition-duration:.001ms !important}
  .rise{opacity:1;transform:none}
  .hero__scroll{display:none}
}

/* ---------- 375px ---------- */
@media (max-width:430px){
  body{font-size:15px}
  .hero__in{padding:88px var(--gut) 116px}
  .hero h1{letter-spacing:.16em;text-indent:.16em}
  .hero__time{font-size:.58rem;letter-spacing:.2em;gap:8px}
  .hero__time i{width:16px}
  .plan3d__cap p{font-size:.78rem}
  .plan3d__legend{font-size:.6rem;letter-spacing:.12em;right:var(--gut)}
  .plan3d__prog{display:none}
  .spec b{width:5.4em}
  .tbl th{width:auto}
  .btn{padding:13px 24px;letter-spacing:.14em}
  .card__body{padding:18px 18px 20px}
}
@media (max-width:380px){
  .hd__name{font-size:.9rem;letter-spacing:.16em}
  .h-sec{letter-spacing:.06em}
}