/* =====================================================
   QOL v7 — Components
   共通UIパーツ: ボタン、リンク、ヘッダー、ドロワー、フッター
===================================================== */

/* ─────────────────────────────────────
   Skip Link (keyboard/screen-reader users)
───────────────────────────────────── */
.skip-link {
  position: absolute;
  top: -6rem;
  left: 1.6rem;
  z-index: 9999;
  background: var(--ink);
  color: var(--paper);
  padding: 1.2rem 2rem;
  border-radius: var(--r-2);
  font-family: var(--f-sans);
  font-size: 1.3rem;
  font-weight: 500;
  transition: top .3s var(--ease-soft);
}
.skip-link:focus {
  top: 1.6rem;
}

/* ─────────────────────────────────────
   Buttons
───────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: space-between;
  gap: 2rem;
  padding: 1.5rem 2rem 1.5rem 2.4rem;
  border-radius: var(--r-2);
  font-family: var(--f-sans);
  font-size: 1.4rem;
  font-weight: 500;
  letter-spacing: .04em;
  position: relative;
  overflow: hidden;
  transition:
    transform .5s var(--ease-weight),
    background-color .35s var(--ease-soft),
    color .35s var(--ease-soft),
    border-color .35s var(--ease-soft);
  isolation: isolate;
  min-height: 5.4rem;
  border: 1px solid transparent;
}
.btn svg {
  width: 1.6rem;
  height: 1.6rem;
  flex-shrink: 0;
  transition: transform .55s var(--ease-snap);
}
.btn::before {
  content: '';
  position: absolute;
  inset: 0;
  z-index: -1;
  background: currentColor;
  opacity: 0;
  transition: opacity .35s var(--ease-soft);
}
.btn:hover svg { transform: translateX(.5rem); }
.btn:active { transform: scale(.98); }

.btn--ink {
  background: var(--ink);
  color: var(--paper);
  border-color: var(--ink);
}
.btn--ink:hover { background: var(--sage-d); border-color: var(--sage-d); }

.btn--outline {
  background: transparent;
  color: var(--ink);
  border-color: var(--ink-30);
}
.btn--outline:hover { border-color: var(--ink); background: var(--ink-06); }

.btn--sage {
  background: var(--sage);
  color: #F5F1E8;
  border-color: var(--sage);
}
.btn--sage:hover { background: var(--sage-d); border-color: var(--sage-d); }

.btn--terra {
  background: var(--terra);
  color: #F9EEE5;
  border-color: var(--terra);
}
.btn--terra:hover { background: var(--terra-d); border-color: var(--terra-d); }

.btn--full { width: 100%; }
.btn--lg {
  padding: 1.9rem 2.4rem 1.9rem 3rem;
  font-size: 1.55rem;
  min-height: 6.4rem;
}

/* Link arrow */
.link-arrow {
  display: inline-flex;
  align-items: center;
  gap: .6rem;
  font-family: var(--f-mono);
  font-size: 1.15rem;
  letter-spacing: .1em;
  text-transform: uppercase;
  color: var(--sage-d);
  padding-bottom: .3rem;
  border-bottom: 1px solid var(--sage);
  transition: color .3s var(--ease-soft), gap .4s var(--ease-snap);
}
.link-arrow svg {
  width: 1.3rem;
  height: 1.3rem;
  transition: transform .4s var(--ease-snap);
}
.link-arrow:hover { gap: 1rem; }
.link-arrow:hover svg { transform: translateX(.3rem); }

/* ─────────────────────────────────────
   Site Header
───────────────────────────────────── */
.site-header {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 500;
  height: 7.2rem;
  display: flex;
  align-items: center;
  padding: 0 clamp(1.6rem, 3vw, 3rem);
  transition:
    background-color .5s var(--ease-soft),
    box-shadow .5s var(--ease-soft),
    backdrop-filter .5s var(--ease-soft);
  /* PC：透明スタート */
  background: transparent;
}

/* PCスクロール後：すりガラス */
.site-header.is-scrolled {
  background: rgba(244, 241, 235, .92);
  backdrop-filter: blur(18px) saturate(1.2);
  -webkit-backdrop-filter: blur(18px) saturate(1.2);
  box-shadow: 0 1px 0 var(--ink-12);
}

.site-header__inner {
  width: 100%;
  max-width: var(--wrap-max);
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 2rem;
}
.site-header__logo {
  display: flex;
  flex-direction: column;
  line-height: 1.15;
  transition: color .4s var(--ease-soft);
}
.site-header__logo-en {
  font-family: var(--f-serif);
  font-style: italic;
  font-size: 1.9rem;
  font-weight: 400;
  letter-spacing: -0.01em;
  color: var(--ink);
}
.site-header__logo-ja {
  font-family: var(--f-sans);
  font-size: 1rem;
  font-weight: 500;
  letter-spacing: .05em;
  color: var(--ink-50);
  margin-top: .15rem;
}
.site-header__nav ul {
  display: flex;
  gap: clamp(1.6rem, 2.4vw, 3rem);
  align-items: center;
}
.site-header__nav a {
  font-family: var(--f-sans);
  font-size: 1.25rem;
  font-weight: 500;
  color: var(--ink);
  letter-spacing: .02em;
  position: relative;
  padding: .3rem 0;
  display: inline-flex;
  align-items: center;
  gap: .5rem;
  transition: color .3s var(--ease-soft);
}
.site-header__nav a .nav-num {
  font-family: var(--f-mono);
  font-size: .9rem;
  font-weight: 400;
  color: var(--ink-50);
  letter-spacing: .05em;
  transition: color .3s var(--ease-soft);
}
.site-header__nav a::after {
  content: '';
  position: absolute;
  left: 0; right: 0;
  bottom: -.2rem;
  height: 1px;
  background: var(--sage);
  transform: scaleX(0);
  transform-origin: right;
  transition: transform .5s var(--ease-weight);
}
.site-header__nav a:hover { color: var(--sage-d); }
.site-header__nav a:hover .nav-num { color: var(--sage); }
.site-header__nav a:hover::after {
  transform: scaleX(1);
  transform-origin: left;
}
.site-header__nav a.is-active { color: var(--sage-d); }
.site-header__nav a.is-active .nav-num { color: var(--sage); }
.site-header__nav a.is-active::after { transform: scaleX(1); transform-origin: left; }

.site-header__cta {
  display: inline-flex;
  align-items: center;
  gap: .7rem;
  padding: .9rem 1.6rem;
  border: 1px solid var(--ink);
  border-radius: var(--r-2);
  font-family: var(--f-sans);
  font-size: 1.2rem;
  font-weight: 500;
  letter-spacing: .04em;
  color: var(--ink);
  background: transparent;
  transition:
    background-color .3s var(--ease-soft),
    color .3s var(--ease-soft),
    transform .3s var(--ease-soft);
}
.site-header__cta svg {
  width: 1.3rem;
  height: 1.3rem;
  transition: transform .4s var(--ease-snap);
}
.site-header__cta:hover {
  background: var(--ink);
  color: var(--paper);
}
.site-header__cta:hover svg { transform: translateX(.3rem); }

/* Burger */
.site-header__burger {
  display: none;
  flex-direction: column;
  gap: .55rem;
  padding: .8rem;
  width: 4.4rem;
  height: 4.4rem;
  justify-content: center;
  align-items: flex-end;
}
.site-header__burger span {
  display: block;
  width: 2.4rem;
  height: 1px;
  background: var(--ink);
  transition:
    transform .4s var(--ease-weight),
    width .4s var(--ease-weight),
    opacity .3s var(--ease-soft);
}
.site-header__burger span:nth-child(2) { width: 1.6rem; }

/* ─────────────────────────────────────
   Site Footer
───────────────────────────────────── */
.site-footer {
  background: var(--ink);
  color: var(--white-70);
  padding: clamp(6rem, 10vw, 9rem) 0 4rem;
  position: relative;
  overflow: hidden;
}
.site-footer .wrap { position: relative; z-index: 2; }
.site-footer__mega {
  font-family: var(--f-serif);
  font-weight: 300;
  font-size: clamp(6rem, 14vw, 18rem);
  line-height: .82;
  letter-spacing: -0.04em;
  color: var(--white-12);
  margin-bottom: 4rem;
  pointer-events: none;
}
.site-footer__mega span { display: block; }
.site-footer__mega em {
  font-style: italic;
  font-family: var(--f-serif);
  color: var(--white-30);
}
.site-footer__grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1fr;
  gap: clamp(2.4rem, 4vw, 5rem);
  margin-bottom: 4rem;
}
.site-footer__name {
  font-family: var(--f-mincho);
  font-size: 1.7rem;
  color: #F5F1E8;
  font-weight: 700;
  margin-bottom: .3rem;
}
.site-footer__en {
  font-family: var(--f-serif);
  font-style: italic;
  font-size: 1.2rem;
  color: var(--white-50);
  margin-bottom: 1.6rem;
}
.site-footer__addr {
  font-family: var(--f-sans);
  font-size: 1.25rem;
  line-height: 1.85;
  color: var(--white-70);
  font-style: normal;
  font-weight: 300;
}
.site-footer__addr a {
  color: var(--white-90);
  border-bottom: 1px solid var(--white-30);
  transition: border-color .3s var(--ease-soft);
}
.site-footer__addr a:hover { border-color: var(--gold-l); }

.site-footer__col {
  font-family: var(--f-mono);
  font-size: 1rem;
  letter-spacing: .25em;
  text-transform: uppercase;
  color: var(--white-50);
  margin-bottom: 1.8rem;
}
.site-footer__links {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}
.site-footer__links a {
  font-family: var(--f-sans);
  font-size: 1.3rem;
  color: var(--white-70);
  transition: color .3s var(--ease-soft), padding-left .4s var(--ease-weight);
  display: inline-flex;
  align-items: baseline;
  gap: .6rem;
}
.site-footer__links a small {
  font-family: var(--f-mono);
  font-size: 1rem;
  color: var(--white-30);
}
.site-footer__links a:hover {
  color: #F5F1E8;
  padding-left: .5rem;
}

.site-footer__rule {
  width: 100%;
  height: 1px;
  background: var(--white-12);
  margin: 3.2rem 0 2.4rem;
}
.site-footer__base {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  flex-wrap: wrap;
  gap: 1rem;
}
.site-footer__copy,
.site-footer__tag {
  font-family: var(--f-mono);
  font-size: 1rem;
  letter-spacing: .18em;
  color: var(--white-50);
}