:root {
  --bg: #14171c;
  --bg-soft: #1b1f26;
  --ink: #eceef2;
  --muted: #9aa3b0;
  --line: #2a2f38;
  --accent: #c9a24b;
  --accent-soft: #e3c987;
  --radius: 14px;
  --maxw: 1080px;
}

* { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; }

body {
  background: var(--bg);
  color: var(--ink);
  font-family: "Hiragino Kaku Gothic ProN", "Yu Gothic", "Noto Sans JP", system-ui, sans-serif;
  line-height: 1.8;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

a { color: inherit; text-decoration: none; }

/* ---------- 共通：セクション見出し ---------- */
.section__eyebrow {
  color: var(--accent);
  letter-spacing: .28em;
  font-size: .74rem;
  font-weight: 700;
  margin-bottom: .8rem;
}
.section__title {
  font-size: clamp(1.6rem, 4.5vw, 2.6rem);
  line-height: 1.35;
  letter-spacing: .02em;
  margin-bottom: 1.8rem;
}

/* ---------- ボタン（ホバー効果） ---------- */
.btn {
  --hb: 0;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: .5em;
  padding: .85rem 1.8rem;
  border-radius: 999px;
  font-weight: 700;
  letter-spacing: .04em;
  border: 1px solid transparent;
  transition: transform .25s ease, box-shadow .25s ease, background .25s ease, color .25s ease, opacity .25s ease;
  will-change: transform;
}
.btn--lg { padding: 1.05rem 2.4rem; font-size: 1.05rem; }
.btn--primary {
  background: linear-gradient(120deg, var(--accent), var(--accent-soft));
  color: #1a1407;
  box-shadow: 0 10px 24px -12px rgba(201, 162, 75, .8);
}
.btn--primary:hover {
  transform: translateY(-3px);
  box-shadow: 0 18px 34px -12px rgba(201, 162, 75, .9);
  filter: brightness(1.05);
}
.btn--ghost {
  border-color: var(--line);
  color: var(--ink);
  background: rgba(255, 255, 255, .02);
}
.btn--ghost:hover {
  transform: translateY(-3px);
  border-color: var(--accent);
  color: var(--accent-soft);
}
.btn:active { transform: translateY(-1px) scale(.99); }

/* ---------- ナビ ---------- */
.nav {
  position: fixed;
  inset: 0 0 auto 0;
  z-index: 50;
  display: flex;
  align-items: center;
  gap: 1.4rem;
  padding: 1.1rem clamp(1rem, 4vw, 2.4rem);
  transition: background .3s ease, padding .3s ease, box-shadow .3s ease, backdrop-filter .3s ease;
}
.nav.is-scrolled {
  background: rgba(20, 23, 28, .82);
  backdrop-filter: blur(10px);
  padding-top: .7rem;
  padding-bottom: .7rem;
  box-shadow: 0 1px 0 var(--line);
}
.nav__logo {
  font-size: 1.4rem;
  font-weight: 800;
  letter-spacing: .14em;
}
.nav__logo span { color: var(--accent); }
.nav__links {
  margin-left: auto;
  display: flex;
  gap: 1.6rem;
  font-size: .92rem;
  font-weight: 600;
}
.nav__links a {
  position: relative;
  color: var(--muted);
  transition: color .2s ease;
}
.nav__links a::after {
  content: "";
  position: absolute;
  left: 0; bottom: -6px;
  width: 100%; height: 2px;
  background: var(--accent);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform .28s ease;
}
.nav__links a:hover { color: var(--ink); }
.nav__links a:hover::after { transform: scaleX(1); }
.nav__cta {
  padding: .5rem 1.3rem;
  border: 1px solid var(--accent);
  border-radius: 999px;
  color: var(--accent-soft);
  font-weight: 700;
  font-size: .9rem;
  transition: background .25s ease, color .25s ease, transform .25s ease;
}
.nav__cta:hover { background: var(--accent); color: #1a1407; transform: translateY(-2px); }
.nav__toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  width: 30px;
  background: none;
  border: 0;
  cursor: pointer;
}
.nav__toggle span {
  height: 2px;
  background: var(--ink);
  border-radius: 2px;
  transition: transform .3s ease, opacity .3s ease;
}

/* ---------- ヒーロー ---------- */
.hero {
  position: relative;
  min-height: 100svh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: 7rem clamp(1.2rem, 6vw, 5rem) 4rem;
  overflow: hidden;
}
.hero__bg {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(120% 90% at 80% 10%, rgba(201, 162, 75, .22), transparent 55%),
    radial-gradient(90% 80% at 10% 90%, rgba(70, 90, 120, .25), transparent 55%),
    linear-gradient(160deg, #181c22, #0f1217);
  animation: heroPan 18s ease-in-out infinite alternate;
}
@keyframes heroPan {
  from { transform: scale(1.05) translateY(0); }
  to   { transform: scale(1.12) translateY(-2%); }
}
.hero__inner { position: relative; max-width: 720px; }
.hero__eyebrow {
  color: var(--accent-soft);
  letter-spacing: .32em;
  font-size: .8rem;
  font-weight: 700;
  margin-bottom: 1.2rem;
}
.hero__title {
  font-size: clamp(2.4rem, 8vw, 4.6rem);
  line-height: 1.22;
  letter-spacing: .02em;
  font-weight: 800;
}
.hero__lead {
  margin: 1.6rem 0 2.4rem;
  color: var(--muted);
  font-size: clamp(1rem, 2.4vw, 1.15rem);
}
.hero__actions { display: flex; gap: 1rem; flex-wrap: wrap; }
.hero__scroll {
  position: absolute;
  left: 50%;
  bottom: 1.6rem;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: .5rem;
  color: var(--muted);
  font-size: .7rem;
  letter-spacing: .25em;
}
.hero__scroll span {
  width: 1px; height: 42px;
  background: linear-gradient(var(--accent), transparent);
  animation: scrollLine 1.8s ease-in-out infinite;
}
@keyframes scrollLine {
  0%, 100% { transform: scaleY(.4); opacity: .4; transform-origin: top; }
  50% { transform: scaleY(1); opacity: 1; transform-origin: top; }
}

/* ---------- コンセプト ---------- */
.concept { padding: clamp(4rem, 12vw, 8rem) clamp(1.2rem, 6vw, 5rem); }
.concept__inner { max-width: var(--maxw); margin: 0 auto; }
.concept__lead { color: var(--muted); max-width: 620px; margin-bottom: 3rem; }
.concept__cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.4rem;
}
.ccard {
  background: var(--bg-soft);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 2rem 1.6rem;
  transition: transform .3s ease, border-color .3s ease, box-shadow .3s ease;
}
.ccard:hover {
  transform: translateY(-6px);
  border-color: var(--accent);
  box-shadow: 0 20px 40px -24px rgba(0, 0, 0, .8);
}
.ccard__icon { font-size: 2rem; display: block; margin-bottom: .8rem; }
.ccard h3 { font-size: 1.2rem; margin-bottom: .5rem; }
.ccard p { color: var(--muted); font-size: .95rem; }

/* ---------- メニュー ---------- */
.menu {
  padding: clamp(4rem, 12vw, 8rem) clamp(1.2rem, 6vw, 5rem);
  background: var(--bg-soft);
}
.menu__inner { max-width: 780px; margin: 0 auto; }
.menu__list { list-style: none; display: grid; gap: 1rem; }
.menu__item {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 1.3rem 1.6rem;
  background: var(--bg);
  transition: transform .25s ease, border-color .25s ease;
}
.menu__item:hover { transform: translateX(6px); border-color: var(--accent); }
.menu__head { display: flex; justify-content: space-between; align-items: baseline; gap: 1rem; }
.menu__name { font-weight: 700; font-size: 1.1rem; }
.menu__price { color: var(--accent-soft); font-weight: 800; white-space: nowrap; }
.menu__desc { color: var(--muted); font-size: .92rem; margin-top: .4rem; }

/* ---------- ギャラリー（スライダー） ---------- */
.gallery {
  padding: clamp(4rem, 12vw, 8rem) clamp(1.2rem, 6vw, 5rem);
  text-align: center;
}
.slider {
  position: relative;
  max-width: 960px;
  margin: 0 auto;
}
.slider__viewport { overflow: hidden; border-radius: var(--radius); }
.slider__track {
  display: flex;
  list-style: none;
  transition: transform .55s cubic-bezier(.22, .61, .36, 1);
}
.slide {
  position: relative;
  flex: 0 0 100%;
  height: clamp(260px, 50vw, 440px);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: .6rem;
  background: linear-gradient(150deg, var(--c1), var(--c2));
  color: #fff;
}
.slide span {
  font-size: clamp(2rem, 7vw, 3.6rem);
  font-weight: 800;
  letter-spacing: .18em;
  opacity: .92;
}
.slide p { letter-spacing: .18em; color: rgba(255, 255, 255, .85); }
.slider__arrow {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  z-index: 3;
  width: 48px; height: 48px;
  display: grid;
  place-items: center;
  font-size: 2rem;
  line-height: 1;
  color: var(--ink);
  background: rgba(20, 23, 28, .6);
  border: 1px solid var(--line);
  border-radius: 50%;
  cursor: pointer;
  backdrop-filter: blur(4px);
  transition: background .25s ease, transform .25s ease, color .25s ease;
}
.slider__arrow:hover { background: var(--accent); color: #1a1407; }
.slider__arrow--prev { left: -8px; }
.slider__arrow--next { right: -8px; }
.slider__dots {
  display: flex;
  gap: .6rem;
  justify-content: center;
  margin-top: 1.4rem;
}
.slider__dots button {
  width: 10px; height: 10px;
  border-radius: 50%;
  border: 0;
  background: var(--line);
  cursor: pointer;
  transition: background .25s ease, transform .25s ease;
}
.slider__dots button.is-active { background: var(--accent); transform: scale(1.3); }

/* ---------- Q&A（アコーディオン） ---------- */
.qa {
  padding: clamp(4rem, 12vw, 8rem) clamp(1.2rem, 6vw, 5rem);
  background: var(--bg-soft);
}
.qa__inner { max-width: 760px; margin: 0 auto; }
.acc__item {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--bg);
  margin-bottom: .9rem;
  overflow: hidden;
}
.acc__q {
  width: 100%;
  text-align: left;
  font: inherit;
  font-weight: 700;
  color: var(--ink);
  background: none;
  border: 0;
  padding: 1.2rem 3.2rem 1.2rem 1.4rem;
  position: relative;
  cursor: pointer;
  transition: color .2s ease, background .2s ease;
}
.acc__q:hover { color: var(--accent-soft); }
.acc__mark {
  position: absolute;
  right: 1.3rem; top: 50%;
  width: 14px; height: 14px;
  transform: translateY(-50%);
}
.acc__mark::before, .acc__mark::after {
  content: "";
  position: absolute;
  background: var(--accent);
  border-radius: 2px;
  transition: transform .3s ease, opacity .3s ease;
}
.acc__mark::before { top: 6px; left: 0; width: 14px; height: 2px; }
.acc__mark::after  { left: 6px; top: 0; width: 2px; height: 14px; }
.acc__item.is-open .acc__mark::after { transform: scaleY(0); opacity: 0; }
.acc__a {
  max-height: 0;
  overflow: hidden;
  transition: max-height .35s ease;
}
.acc__a p {
  padding: 0 1.4rem 1.3rem;
  color: var(--muted);
  font-size: .95rem;
}

/* ---------- 予約 CTA ---------- */
.reserve {
  padding: clamp(4rem, 14vw, 9rem) clamp(1.2rem, 6vw, 5rem);
  text-align: center;
}
.reserve__inner { max-width: 620px; margin: 0 auto; }
.reserve h2 { font-size: clamp(1.8rem, 5vw, 2.8rem); margin-bottom: 1rem; }
.reserve p { color: var(--muted); margin-bottom: 1.8rem; }
.reserve__note { font-size: .82rem; margin-top: 1.6rem; letter-spacing: .08em; }

/* ---------- フッター ---------- */
.footer {
  padding: 2.4rem clamp(1.2rem, 6vw, 5rem);
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: .85rem;
  text-align: center;
}
.footer strong { color: var(--accent-soft); }

/* ---------- トップへ戻る ---------- */
.totop {
  position: fixed;
  right: 1.2rem; bottom: 1.2rem;
  width: 46px; height: 46px;
  border-radius: 50%;
  border: 1px solid var(--line);
  background: rgba(20, 23, 28, .85);
  color: var(--ink);
  font-size: 1.2rem;
  cursor: pointer;
  opacity: 0;
  pointer-events: none;
  transform: translateY(10px);
  transition: opacity .3s ease, transform .3s ease, background .25s ease;
  z-index: 40;
}
.totop.is-visible { opacity: 1; pointer-events: auto; transform: translateY(0); }
.totop:hover { background: var(--accent); color: #1a1407; }

/* ---------- スクロール・リビール ---------- */
.reveal {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity .7s ease, transform .7s ease;
  transition-delay: calc(var(--i, 0) * 90ms);
}
.reveal.is-in { opacity: 1; transform: none; }

/* ---------- レスポンシブ ---------- */
@media (max-width: 760px) {
  .nav__links {
    position: fixed;
    inset: 0 0 0 auto;
    width: min(74vw, 300px);
    flex-direction: column;
    justify-content: center;
    gap: 2rem;
    padding: 2rem;
    background: rgba(16, 18, 23, .97);
    backdrop-filter: blur(8px);
    transform: translateX(100%);
    transition: transform .35s ease;
    font-size: 1.1rem;
  }
  .nav__links.is-open { transform: translateX(0); }
  .nav__cta { display: none; }
  .nav__toggle { display: flex; margin-left: auto; }
  .nav__toggle.is-open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
  .nav__toggle.is-open span:nth-child(2) { opacity: 0; }
  .nav__toggle.is-open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }
  .concept__cards { grid-template-columns: 1fr; }
  .slider__arrow--prev { left: 4px; }
  .slider__arrow--next { right: 4px; }
}

/* ---------- アニメ無効環境への配慮 ---------- */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: .001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .001ms !important;
    scroll-behavior: auto !important;
  }
  .reveal { opacity: 1; transform: none; }
}