/* ==========================================================
   Tokisetsu 共通スタイル（全ページ共通）
   ページ固有のスタイルは各HTMLのインライン<style>に置く
   ========================================================== */
:root{
  --sky-top:#bfe3f5;
  --sky-mid:#dff1fb;
  --sky-low:#eef8fd;
  --white:#ffffff;
  --ink:#1b2733;
  --ink-soft:#54677a;
  --teal:#1f9bb3;
  --teal-deep:#0f7a91;
  --line:rgba(31,155,179,.18);
  --shadow:0 18px 50px -22px rgba(20,70,90,.45);
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  font-family:"Zen Kaku Gothic New",sans-serif;
  color:var(--ink);
  background:var(--white);
  line-height:1.9;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
.mincho{font-family:"Shippori Mincho",serif;}
.corm{font-family:"Cormorant Garamond",serif;}

/* キーボードフォーカスの可視化 */
a:focus-visible,button:focus-visible,summary:focus-visible,[tabindex]:focus-visible{
  outline:2px solid var(--teal-deep);outline-offset:3px;border-radius:2px;
}
.overlay a:focus-visible{outline-color:#fff;}
body.menu-open .burger:focus-visible{outline-color:#fff;}

/* ---------- Header ---------- */
header{
  position:fixed;top:0;left:0;width:100%;z-index:130;
  display:flex;align-items:center;justify-content:space-between;
  padding:22px 48px;
  transition:background .4s ease,padding .4s ease,box-shadow .4s ease;
}
header.scrolled{
  background:rgba(255,255,255,.86);
  backdrop-filter:blur(12px);
  padding:14px 48px;
  box-shadow:0 1px 0 var(--line);
}
/* 下層ページは常時ソリッド */
header.page{
  background:rgba(255,255,255,.86);
  backdrop-filter:blur(12px);
  box-shadow:0 1px 0 var(--line);
}
.brand{display:flex;align-items:center;gap:12px;text-decoration:none;}
.brand .mark-img{width:38px;height:38px;object-fit:contain;flex:none;display:block;}
.brand .name{font-family:"Cormorant Garamond",serif;font-size:26px;letter-spacing:.18em;color:var(--ink);transition:color .4s;font-weight:500;}
.burger{
  display:flex;flex-direction:column;gap:6px;cursor:pointer;z-index:120;padding:4px;
  background:none;border:0;appearance:none;-webkit-appearance:none;
}
.burger span{width:30px;height:2px;background:var(--ink);transition:background .4s,transform .4s,opacity .3s;}
body.menu-open .burger span{background:var(--white);}
body.menu-open .brand .name{color:var(--white);}
body.menu-open .brand .mark-img{filter:brightness(0) invert(1);}
body.menu-open .burger span:nth-child(1){transform:translateY(8px) rotate(45deg);}
body.menu-open .burger span:nth-child(2){opacity:0;}
body.menu-open .burger span:nth-child(3){transform:translateY(-8px) rotate(-45deg);}

/* ---------- Full-screen overlay menu ---------- */
.overlay{
  position:fixed;inset:0;z-index:110;
  background:linear-gradient(160deg,var(--teal-deep) 0%,#0c6376 55%,#08323f 100%);
  display:flex;align-items:center;justify-content:center;overflow-y:auto;-webkit-overflow-scrolling:touch;
  opacity:0;visibility:hidden;transition:opacity .5s ease,visibility .5s;
}
body.menu-open .overlay{opacity:1;visibility:visible;}
.overlay-inner{display:grid;grid-template-columns:1.3fr 1fr;gap:60px;max-width:980px;width:100%;padding:0 48px;}
.ov-menu{list-style:none;}
.ov-menu li{overflow:hidden;}
.ov-menu a{
  display:inline-block;text-decoration:none;color:#fff;
  font-family:"Shippori Mincho",serif;font-size:clamp(22px,3vw,30px);font-weight:500;
  letter-spacing:.06em;padding:9px 0;position:relative;
  transform:translateY(110%);transition:transform .6s cubic-bezier(.2,.8,.2,1),color .3s;
}
.ov-menu a .en{display:block;font-family:"Cormorant Garamond",serif;font-size:12px;letter-spacing:.3em;color:rgba(255,255,255,.5);margin-bottom:-2px;}
body.menu-open .ov-menu a{transform:translateY(0);}
.ov-menu li:nth-child(1) a{transition-delay:.12s;}
.ov-menu li:nth-child(2) a{transition-delay:.17s;}
.ov-menu li:nth-child(3) a{transition-delay:.22s;}
.ov-menu li:nth-child(4) a{transition-delay:.27s;}
.ov-menu li:nth-child(5) a{transition-delay:.32s;}
.ov-menu li:nth-child(6) a{transition-delay:.37s;}
.ov-menu a:hover{color:var(--sky-top);}
.ov-side{border-left:1px solid rgba(255,255,255,.18);padding-left:50px;align-self:center;opacity:0;transition:opacity .6s ease .4s;}
body.menu-open .ov-side{opacity:1;}
.ov-side h4{font-family:"Cormorant Garamond",serif;font-size:13px;letter-spacing:.25em;color:var(--sky-top);margin-bottom:18px;}
.ov-sub{list-style:none;}
.ov-sub a{display:block;text-decoration:none;color:rgba(255,255,255,.78);font-size:14px;letter-spacing:.05em;padding:7px 0;transition:color .3s,padding-left .3s;}
.ov-sub a:hover{color:#fff;padding-left:8px;}
.ov-sub a.current{color:#fff;border-left:2px solid var(--sky-top);padding-left:12px;}
.ov-contact{margin-top:30px;font-size:13px;color:rgba(255,255,255,.6);line-height:2;letter-spacing:.04em;}
.ov-contact .tel{font-family:"Cormorant Garamond",serif;font-size:22px;color:#fff;letter-spacing:.08em;display:block;margin-top:4px;text-decoration:none;}

/* ---------- Page hero（下層ページ） ---------- */
.page-hero{position:relative;min-height:62vh;display:flex;align-items:center;overflow:hidden;background:linear-gradient(180deg,var(--sky-top),var(--sky-low));}
.page-hero .photo{position:absolute;inset:0;background-position:center 50%;background-size:cover;background-repeat:no-repeat;opacity:.4;mix-blend-mode:luminosity;}
.page-hero::after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,rgba(191,227,245,.3),rgba(255,255,255,.8));}
.page-hero .inner{position:relative;z-index:3;padding:120px 48px 0;max-width:1180px;margin:0 auto;width:100%;}
.crumb{font-family:"Cormorant Garamond",serif;font-size:13px;letter-spacing:.18em;color:var(--teal-deep);margin-bottom:20px;}
.crumb a{color:var(--teal-deep);text-decoration:none;}
.page-hero .cat{font-family:"Cormorant Garamond",serif;font-size:15px;letter-spacing:.28em;color:var(--teal-deep);text-transform:uppercase;}
.page-hero h1,.page-hero .h1-look{font-family:"Shippori Mincho",serif;font-size:clamp(30px,4.8vw,52px);font-weight:600;letter-spacing:.05em;line-height:1.5;margin:14px 0 18px;}
.page-hero p{font-size:16px;color:var(--ink-soft);max-width:600px;margin-bottom:34px;}
.hero-btns{display:flex;gap:16px;flex-wrap:wrap;}

/* ---------- 共通パーツ ---------- */
.btn{
  display:inline-flex;align-items:center;gap:10px;
  background:var(--teal);color:var(--white);text-decoration:none;
  padding:17px 40px;border-radius:999px;letter-spacing:.1em;font-weight:500;font-size:15px;
  box-shadow:0 16px 34px -14px rgba(15,122,145,.8);transition:transform .25s,background .25s;
}
.btn:hover{background:var(--teal-deep);transform:translateY(-3px);}
.btn.ghost{background:transparent;color:var(--teal-deep);border:1.5px solid var(--teal);box-shadow:none;}
.btn.ghost:hover{background:var(--teal);color:#fff;transform:translateY(-3px);}

.reveal{opacity:0;transform:translateY(40px);transition:opacity 1s ease,transform 1s cubic-bezier(.2,.7,.2,1);}
.reveal.in{opacity:1;transform:translateY(0);}

section{padding:110px 48px;}
.wrap{max-width:1100px;margin:0 auto;}
.sec-label{margin-bottom:56px;font-weight:500;}
.sec-label .en{font-family:"Cormorant Garamond",serif;font-size:44px;letter-spacing:.1em;color:var(--teal);line-height:1;font-weight:500;display:block;}
.sec-label .ja{display:block;margin-top:10px;font-size:13px;letter-spacing:.4em;color:var(--ink-soft);font-weight:500;}

/* ---------- Footer ---------- */
footer{background:var(--ink);color:rgba(255,255,255,.8);padding:64px 48px 40px;}
.foot-top{display:flex;justify-content:space-between;flex-wrap:wrap;gap:40px;max-width:1180px;margin:0 auto;}
.foot-brand .name{font-family:"Cormorant Garamond",serif;font-size:30px;letter-spacing:.16em;color:#fff;}
.foot-brand p{margin-top:14px;font-size:13px;color:rgba(255,255,255,.55);line-height:2;}
.foot-nav{display:flex;gap:60px;flex-wrap:wrap;}
.foot-col h4{font-size:12px;letter-spacing:.2em;color:var(--teal);margin-bottom:16px;font-weight:500;}
.foot-col a{display:block;color:rgba(255,255,255,.7);text-decoration:none;font-size:13.5px;margin-bottom:10px;transition:color .3s;}
.foot-col a:hover{color:#fff;}
.copy{text-align:center;margin-top:50px;font-family:"Cormorant Garamond",serif;font-size:12px;letter-spacing:.2em;color:rgba(255,255,255,.6);}

/* ---------- Responsive（共通） ---------- */
@media(max-width:860px){
  header{padding:18px 22px;}
  header.scrolled{padding:12px 22px;}
  .overlay{align-items:flex-start;}
  .overlay-inner{grid-template-columns:1fr;gap:30px;padding:96px 32px 48px;}
  .ov-side{border-left:none;border-top:1px solid rgba(255,255,255,.18);padding-left:0;padding-top:28px;}
  section{padding:84px 22px;}
  .page-hero .inner{padding:110px 22px 0;}
  .page-hero .cat{font-size:13px;letter-spacing:.16em;}
  .page-hero h1,.page-hero .h1-look{letter-spacing:.04em;}
  .page-hero p{font-size:14.5px;}
  .foot-top{flex-direction:column;}
}

/* ---------- 動きを控えたい設定への配慮 ---------- */
@media (prefers-reduced-motion: reduce){
  html{scroll-behavior:auto;}
  *,*::before,*::after{
    animation-duration:.01ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.01ms !important;
  }
}