/*
 * style.css — GYU-SUKE（熟成飛騨牛焼肉／高山）
 * デザイン：漆黒×金の高級熟成焼肉店。訪日観光客に「特別な体験」を予感させるシネマティックな写真主体の構成。
 */
:root{
  --ink-950:#0e0d0b; --ink-900:#161410; --ink-800:#211d17; --ink-700:#332c22;
  --gold-500:#c9a227; --gold-400:#e0bf55; --gold-050:#f8f1de;
  --cream:#faf6ee; --cream-2:#f1e9d8; --white:#fff;
  --text-soft:#cfc6b4;
  --serif:"Playfair Display","Noto Serif JP",serif;
  --sans:"Noto Sans JP","Noto Sans SC","Noto Sans KR",-apple-system,"Hiragino Kaku Gothic ProN",sans-serif;
  --wrap:1180px; --header-h:82px; --radius:14px;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{font-family:var(--sans);color:var(--ink-900);background:var(--cream);line-height:1.85;font-size:16px;overflow-x:hidden}
img{max-width:100%;height:auto;display:block}
a{color:inherit;text-decoration:none;transition:.2s}
ul,ol{list-style:none}
.wrap{width:min(var(--wrap),92%);margin-inline:auto}

.reveal{opacity:0;transform:translateY(22px);transition:opacity .7s ease,transform .7s ease}
.reveal.in{opacity:1;transform:none}

.section{padding:clamp(3.5rem,7vw,6.5rem) 0}
.section--tint{background:var(--cream-2)}
.section--ink{background:var(--ink-950);color:var(--text-soft)}
.section-head{max-width:680px;margin:0 auto clamp(2rem,4.5vw,3.5rem);text-align:center}
.eyebrow{display:inline-block;font-size:.72rem;letter-spacing:.32em;color:var(--gold-500);font-weight:700;text-transform:uppercase;margin-bottom:.7rem}
.section-head h2{font-family:var(--serif);font-size:clamp(1.7rem,3.6vw,2.5rem);font-weight:700;line-height:1.4;color:var(--ink-900)}
.section--ink .section-head h2{color:var(--gold-050)}
.section-head .lead{margin-top:1rem;color:var(--ink-700)}
.section--ink .section-head .lead{color:var(--text-soft)}

.btn{display:inline-flex;align-items:center;gap:.6rem;font-weight:700;font-size:.94rem;padding:1rem 2.3rem;border-radius:999px;border:2px solid var(--gold-500);color:var(--gold-500);background:transparent;cursor:pointer;transition:.25s;line-height:1.3}
.btn--fill{background:var(--gold-500);color:var(--ink-950);border-color:var(--gold-500)}
.btn--fill:hover{background:var(--gold-400);border-color:var(--gold-400);transform:translateY(-2px)}
.btn--ghost{color:var(--gold-400);border-color:rgba(201,162,39,.6)}
.btn--ghost:hover{background:var(--gold-500);color:var(--ink-950);border-color:var(--gold-500)}

/* ヘッダー */
.header{position:fixed;top:0;left:0;right:0;z-index:200;height:var(--header-h);display:flex;align-items:center;background:rgba(14,13,11,.82);backdrop-filter:saturate(1.3) blur(10px);border-bottom:1px solid rgba(201,162,39,.18)}
.header .wrap{display:flex;align-items:center;justify-content:space-between}
.brand{display:flex;flex-direction:column;line-height:1.1;color:var(--gold-050)}
.brand__mark{font-family:var(--serif);font-weight:700;font-size:1.4rem;letter-spacing:.04em;color:var(--gold-400)}
.brand__sub{font-size:.62rem;letter-spacing:.24em;color:var(--text-soft);text-transform:uppercase;margin-top:.15rem}
.nav{display:flex;align-items:center;gap:1.7rem}
.nav>a{color:#e8e2d3;font-size:.9rem;font-weight:500;position:relative;padding:.3rem 0}
.nav>a::after{content:"";position:absolute;left:0;bottom:-3px;width:0;height:1.5px;background:var(--gold-500);transition:width .25s}
.nav>a:hover{color:var(--gold-400)}
.nav>a:hover::after{width:100%}
.nav__cta{background:var(--gold-500);color:var(--ink-950)!important;padding:.6rem 1.4rem!important;border-radius:999px;font-weight:700}
.nav__cta::after{display:none}
.nav__cta:hover{background:var(--gold-400)}

.langswitch{position:relative}
.langswitch__btn{display:flex;align-items:center;gap:.4rem;background:transparent;border:1px solid rgba(201,162,39,.4);color:#e8e2d3;padding:.45rem .9rem;border-radius:999px;font-size:.82rem;cursor:pointer;font-family:var(--sans)}
.langswitch__btn:hover{border-color:var(--gold-500)}
.langswitch__btn i{font-style:normal;opacity:.7;font-size:.75rem}
.langswitch__menu{position:absolute;top:calc(100% + 10px);right:0;background:var(--ink-900);border:1px solid rgba(201,162,39,.25);border-radius:10px;padding:.4rem;min-width:150px;display:none;box-shadow:0 20px 40px rgba(0,0,0,.4)}
.langswitch__menu.open{display:block}
.langswitch__menu button{display:flex;align-items:center;gap:.6rem;width:100%;background:transparent;border:0;color:#e8e2d3;padding:.55rem .7rem;border-radius:6px;cursor:pointer;font-size:.85rem;text-align:left;font-family:var(--sans)}
.langswitch__menu button:hover{background:rgba(201,162,39,.15)}
.langswitch__menu button.on{color:var(--gold-400);font-weight:700}

.nav-toggle{display:none;background:none;border:0;cursor:pointer;width:32px;height:24px;position:relative}
.nav-toggle span{position:absolute;left:0;width:100%;height:2px;background:var(--gold-400);transition:.3s}
.nav-toggle span:nth-child(1){top:1px}.nav-toggle span:nth-child(2){top:11px}.nav-toggle span:nth-child(3){top:21px}
.nav-toggle.open span:nth-child(1){top:11px;transform:rotate(45deg)}
.nav-toggle.open span:nth-child(2){opacity:0}
.nav-toggle.open span:nth-child(3){top:11px;transform:rotate(-45deg)}

/* ヒーロー */
.hero{position:relative;min-height:100vh;display:flex;align-items:center;color:#fff;overflow:hidden;background:var(--ink-950)}
.hero__slides{position:absolute;inset:0}
.hero__slide{position:absolute;inset:0;background-size:cover;background-position:center;opacity:0;transition:opacity 1.6s ease}
.hero__slide.on{opacity:1}
.hero__scrim{position:absolute;inset:0;background:linear-gradient(180deg,rgba(14,13,11,.55) 0%,rgba(14,13,11,.35) 40%,rgba(14,13,11,.92) 100%)}
.hero__inner{position:relative;z-index:2;padding-top:var(--header-h);text-align:center;display:flex;flex-direction:column;align-items:center}
.hero__word{font-family:var(--serif);font-weight:700;font-size:clamp(3rem,9vw,6rem);letter-spacing:.06em;color:var(--gold-400);text-shadow:0 6px 40px rgba(0,0,0,.5);line-height:1}
.hero__subtitle{margin-top:.9rem;font-size:clamp(1rem,2vw,1.3rem);letter-spacing:.16em;color:#f1ebdb}
.hero__desc{margin:1.6rem auto 2.3rem;max-width:620px;color:#e6e0d2;font-size:clamp(.95rem,1.6vw,1.05rem)}
.hero__dots{position:absolute;bottom:clamp(1.2rem,4vh,2.2rem);left:0;right:0;z-index:2;display:flex;justify-content:center;gap:.5rem}
.hero__dots button{width:8px;height:8px;border-radius:50%;border:0;background:rgba(255,255,255,.35);cursor:pointer;padding:0}
.hero__dots button.on{background:var(--gold-400);width:22px;border-radius:5px;transition:.3s}

.trustbar{display:flex;flex-wrap:wrap;justify-content:center;gap:.7rem 1.1rem;margin-top:2.4rem;font-size:.82rem;color:#f1ebdb}
.trustbar__item{display:flex;align-items:center;gap:.4rem;border:1px solid rgba(201,162,39,.35);padding:.5rem 1rem;border-radius:999px;background:rgba(255,255,255,.04)}

/* こだわり */
.about-grid{display:grid;gap:1.6rem;grid-template-columns:repeat(auto-fit,minmax(250px,1fr))}
.about-card{position:relative;border-radius:var(--radius);overflow:hidden;min-height:340px;display:flex;align-items:flex-end;background:var(--ink-900)}
.about-card img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;opacity:.55;transition:transform .5s ease,opacity .3s ease}
.about-card:hover img{transform:scale(1.06);opacity:.68}
.about-card::before{content:"";position:absolute;inset:0;background:linear-gradient(180deg,transparent 30%,rgba(14,13,11,.92) 100%)}
.about-card__body{position:relative;z-index:1;padding:1.7rem 1.5rem}
.about-card__ic{color:var(--gold-400);font-size:1.3rem;margin-bottom:.5rem}
.about-card__body h3{font-family:var(--serif);font-size:1.15rem;color:#fff;margin-bottom:.5rem}
.about-card__body p{font-size:.86rem;color:var(--text-soft)}

/* メニュー・コース */
.course{display:grid;grid-template-columns:1fr 1fr;gap:clamp(1.6rem,4vw,3.2rem);align-items:center;background:rgba(255,255,255,.03);border:1px solid rgba(201,162,39,.2);border-radius:20px;padding:clamp(1.2rem,3vw,2.2rem);overflow:hidden}
.course__media{position:relative;border-radius:14px;overflow:hidden}
.course__media img{aspect-ratio:4/5;object-fit:cover}
.course__badge{position:absolute;top:1rem;left:1rem;background:var(--gold-500);color:var(--ink-950);font-weight:700;font-size:.75rem;padding:.4rem .9rem;border-radius:999px}
.course__eng{font-size:.72rem;letter-spacing:.3em;color:var(--gold-500);font-weight:700;text-transform:uppercase}
.course__body h3{font-family:var(--serif);font-size:clamp(1.4rem,2.6vw,1.9rem);margin:.5rem 0;color:#fff}
.course__price{font-family:var(--serif);font-size:1.9rem;color:var(--gold-400);margin-bottom:1rem}
.course__desc{color:var(--text-soft);margin-bottom:1.4rem;font-size:.94rem}
.course__list{display:grid;gap:.55rem;margin-bottom:1.8rem}
.course__list li{display:flex;align-items:center;gap:.7rem;color:#e8e2d3;font-size:.92rem;padding-bottom:.55rem;border-bottom:1px dashed rgba(201,162,39,.25)}
.course__list li::before{content:counter(li);counter-increment:li;flex:none;width:22px;height:22px;border-radius:50%;border:1px solid var(--gold-500);color:var(--gold-400);font-size:.7rem;display:grid;place-items:center}
.course__list{counter-reset:li}
.course__note{margin-top:1.2rem;font-size:.78rem;color:#a89e8a}

/* ギャラリー */
.photo-grid{display:grid;gap:.9rem;grid-template-columns:repeat(4,1fr);grid-auto-rows:160px}
.photo-grid img{width:100%;height:100%;object-fit:cover;border-radius:10px;transition:transform .4s ease,box-shadow .3s ease}
.photo-grid a{display:block;overflow:hidden;border-radius:10px}
.photo-grid a:hover img{transform:scale(1.08)}
.photo-grid a:nth-child(6n+1){grid-column:span 2;grid-row:span 2}

/* VIP */
.vip{display:grid;grid-template-columns:1.1fr 1fr;gap:clamp(1.6rem,4vw,3rem);align-items:start}
.vip__gallery{display:grid;grid-template-columns:1fr 1fr;gap:.8rem}
.vip__gallery img{border-radius:12px;aspect-ratio:1/1;object-fit:cover}
.vip__gallery img:first-child{grid-column:span 2;aspect-ratio:16/10}
.vip__body h3{font-family:var(--serif);font-size:clamp(1.3rem,2.4vw,1.7rem);margin-bottom:.9rem;color:var(--ink-900)}
.vip__body p{color:var(--ink-700);margin-bottom:1.3rem}
.vip__features{display:grid;gap:1rem;grid-template-columns:1fr 1fr;margin-bottom:1.3rem}
.vip__feature b{display:block;font-size:.95rem;color:var(--ink-900);margin-bottom:.2rem}
.vip__feature span{font-size:.82rem;color:var(--ink-700)}
.vip__notice{font-size:.82rem;color:#a3752a;margin-bottom:1.2rem}

/* 予約ステップ */
.steps{display:grid;gap:1.6rem;grid-template-columns:repeat(3,1fr)}
.step{text-align:center;padding:1.6rem 1.2rem;position:relative}
.step__n{width:52px;height:52px;border-radius:50%;background:var(--ink-950);color:var(--gold-400);font-family:var(--serif);font-size:1.3rem;font-weight:700;display:grid;place-items:center;margin:0 auto 1.1rem}
.step h3{font-size:1.05rem;margin-bottom:.5rem;color:var(--ink-900)}
.step p{font-size:.86rem;color:var(--ink-700)}

/* アクセス */
.access{display:grid;grid-template-columns:1fr 1fr;gap:clamp(1.6rem,4vw,3rem);align-items:center}
.access__row{padding:1rem 0;border-bottom:1px solid rgba(201,162,39,.18)}
.access__row b{display:block;font-size:.74rem;letter-spacing:.15em;color:var(--gold-500);text-transform:uppercase;margin-bottom:.4rem}
.access__row p,.access__row a{color:#e8e2d3;font-size:.98rem}
.access__actions{display:flex;gap:1rem;flex-wrap:wrap;margin-top:1.6rem}
.access__media img{border-radius:16px;aspect-ratio:4/3;object-fit:cover}

/* フッター */
.footer{background:var(--ink-950);color:var(--text-soft);padding:3.5rem 0 1.5rem}
.footer__top{display:grid;gap:2rem;grid-template-columns:1.2fr 1fr 1fr 1fr;padding-bottom:2rem;border-bottom:1px solid rgba(201,162,39,.15)}
.footer__brand{display:flex;flex-direction:column;gap:.4rem}
.footer__brand .brand__mark{color:var(--gold-400)}
.footer__nav{display:flex;flex-direction:column;gap:.6rem;font-size:.88rem}
.footer__contact{display:flex;flex-direction:column;gap:.5rem;font-size:.88rem}
.footer__contact b{color:#fff;font-size:.78rem;letter-spacing:.1em;text-transform:uppercase}
.footer__social b{display:block;color:#fff;font-size:.78rem;letter-spacing:.1em;text-transform:uppercase;margin-bottom:.6rem}
.footer__social-icons{display:flex;gap:.7rem}
.footer__social-icons a{width:36px;height:36px;border-radius:50%;border:1px solid rgba(201,162,39,.4);display:grid;place-items:center;font-size:.9rem}
.footer__social-icons a:hover{background:var(--gold-500);color:var(--ink-950)}
.footer__bottom{text-align:center;font-size:.78rem;color:#8a8272;padding-top:1.4rem}

/* レスポンシブ */
@media (max-width:960px){
  .course,.vip,.access{grid-template-columns:1fr}
  .footer__top{grid-template-columns:1fr 1fr}
  .photo-grid{grid-template-columns:repeat(3,1fr)}
}
@media (max-width:760px){
  .nav{position:fixed;top:var(--header-h);left:0;right:0;background:var(--ink-950);flex-direction:column;align-items:stretch;padding:1.2rem 6%;gap:1rem;transform:translateY(-140%);transition:transform .3s ease;border-bottom:1px solid rgba(201,162,39,.2)}
  .nav.open{transform:translateY(0)}
  .nav__cta{text-align:center}
  .nav-toggle{display:block}
  .steps{grid-template-columns:1fr}
  .vip__features{grid-template-columns:1fr}
  .footer__top{grid-template-columns:1fr}
  .photo-grid{grid-template-columns:repeat(2,1fr)}
  .photo-grid a:nth-child(6n+1){grid-column:span 2;grid-row:span 1}
}