/* common.css — ヘッダー・フッター・共通コンポーネント */

/* ── Base ── */
body {
  font-family: var(--gothic);
  color: var(--sumi);
  background: var(--kinari);
  line-height: 1.9;
  font-size: 15px;
  font-weight: 400;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  letter-spacing: 0.02em;
}

/* ── Layout ── */
.container {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 32px;
}

.container-narrow {
  max-width: var(--max-content);
  margin: 0 auto;
  padding: 0 32px;
}

section {
  padding: 120px 0;
  position: relative;
}

/* ── Typography ── */
.section-num {
  display: block;
  font-family: var(--serif-en);
  font-style: italic;
  font-size: 13px;
  letter-spacing: 0.25em;
  color: var(--sage);
  margin-bottom: 16px;
}

.section-title {
  font-family: var(--mincho);
  font-size: clamp(28px, 3vw, 36px);
  font-weight: 500;
  color: var(--sumi);
  letter-spacing: 0.06em;
  line-height: 1.4;
  margin-bottom: 24px;
}

.section-lead {
  font-family: var(--gothic);
  font-size: 15px;
  line-height: 2.1;
  color: var(--sumi);
  letter-spacing: 0.04em;
}

/* ── Buttons ── */
.btn {
  display: inline-flex;
  align-items: center;
  padding: 16px 36px;
  font-family: var(--gothic);
  font-size: 13px;
  font-weight: 500;
  letter-spacing: 0.15em;
  transition: all var(--t);
  cursor: pointer;
  border: 1px solid;
}

.btn-primary {
  background: var(--sage-deep);
  color: var(--washi);
  border-color: var(--sage-deep);
}

.btn-primary:hover {
  background: var(--sumi);
  border-color: var(--sumi);
}

.btn-secondary {
  background: transparent;
  color: var(--sage-deep);
  border-color: var(--sage-deep);
}

.btn-secondary:hover {
  background: var(--sage-deep);
  color: var(--washi);
}

/* ── Link Arrow ── */
.link-arrow {
  display: inline-flex;
  align-items: center;
  font-family: var(--gothic);
  font-size: 13px;
  letter-spacing: 0.1em;
  color: var(--sage-deep);
  border-bottom: 1px solid var(--sage-deep);
  padding-bottom: 4px;
  margin-top: 24px;
  transition: all var(--t);
}

.link-arrow::after {
  content: '→';
  margin-left: 8px;
  transition: transform var(--t);
}

.link-arrow:hover { color: var(--sumi); border-color: var(--sumi); }
.link-arrow:hover::after { transform: translateX(4px); }

/* ── Image Placeholder ── */
.image-placeholder {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  font-family: var(--mincho);
  font-size: 12px;
  color: var(--sage);
  letter-spacing: 0.1em;
  padding: 24px;
  line-height: 1.8;
}

.image-placeholder::before {
  content: '';
  position: absolute;
  inset: 24px;
  border: 1px dashed rgba(74, 90, 66, 0.3);
}

/* ── Header ── */
.header {
  position: sticky;
  top: 0;
  background: rgba(245, 241, 232, 0.92);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  border-bottom: 1px solid rgba(220, 217, 207, 0.5);
  z-index: 100;
  transition: background var(--t);
}

.header-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 20px 32px;
  max-width: var(--max-w);
  margin: 0 auto;
}

.logo {
  font-family: var(--mincho);
  font-weight: 500;
  font-size: 18px;
  letter-spacing: 0.05em;
  color: var(--sumi);
  display: flex;
  align-items: baseline;
  gap: 0;
}

.logo-en {
  font-family: var(--serif-en);
  font-style: italic;
  font-size: 12px;
  color: var(--mute);
  margin-left: 8px;
  letter-spacing: 0.1em;
}

.nav {
  display: flex;
  align-items: center;
  gap: 36px;
}

.nav-links {
  display: flex;
  gap: 32px;
}

.nav-links a {
  font-size: 13px;
  letter-spacing: 0.08em;
  color: var(--sumi);
  position: relative;
  padding: 4px 0;
  transition: color var(--t);
}

.nav-links a::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 1px;
  background: var(--sage-deep);
  transition: width var(--t);
}

.nav-links a:hover,
.nav-links a.current {
  color: var(--sage-deep);
}

.nav-links a:hover::after,
.nav-links a.current::after {
  width: 100%;
}

.cta-header {
  background: var(--sage-deep);
  color: var(--washi);
  padding: 10px 22px;
  font-family: var(--serif-en);
  font-size: 12px;
  letter-spacing: 0.2em;
  font-weight: 500;
  border: 1px solid var(--sage-deep);
  transition: all var(--t);
  white-space: nowrap;
}

.cta-header:hover {
  background: var(--sumi);
  border-color: var(--sumi);
}

/* ── Hamburger (mobile) ── */
.hamburger {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 6px;
  width: 32px;
  height: 32px;
  cursor: pointer;
  z-index: 110;
  transition: opacity var(--t);
}

.hamburger:hover { opacity: 0.6; }

.hamburger span {
  display: block;
  width: 100%;
  height: 1px;
  background: var(--sumi);
  transition: all var(--t);
  transform-origin: center;
}

.hamburger.is-open span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}
.hamburger.is-open span:nth-child(2) {
  opacity: 0;
  transform: scaleX(0);
}
.hamburger.is-open span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* ── Mobile Menu ── */
.mobile-menu {
  position: fixed;
  inset: 0;
  background: var(--kinari);
  z-index: 105;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.4s;
}

.mobile-menu.is-open {
  opacity: 1;
  pointer-events: all;
}

.mobile-menu__list {
  text-align: center;
}

.mobile-menu__list li {
  margin-bottom: 32px;
}

.mobile-menu__link {
  font-family: var(--mincho);
  font-size: 20px;
  letter-spacing: 0.12em;
  color: var(--sumi);
  position: relative;
  padding-bottom: 4px;
  transition: color var(--t);
}

.mobile-menu__link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 0;
  height: 1px;
  background: var(--sage-deep);
  transition: width var(--t);
}

.mobile-menu__link:hover { color: var(--sage-deep); }
.mobile-menu__link:hover::after { width: 100%; }

.mobile-menu__cta {
  display: inline-flex;
  align-items: center;
  margin-top: 48px;
  padding: 14px 40px;
  background: var(--sage-deep);
  color: var(--washi);
  font-family: var(--mincho);
  font-size: 14px;
  letter-spacing: 0.15em;
  transition: background var(--t);
}

.mobile-menu__cta:hover { background: var(--sumi); }

.mobile-menu__close {
  position: absolute;
  top: 24px;
  right: 28px;
  font-size: 24px;
  color: var(--sumi);
  opacity: 0.5;
  transition: opacity var(--t);
  line-height: 1;
}

.mobile-menu__close:hover { opacity: 1; }

/* ── Footer ── */
.footer {
  background: var(--sumi);
  color: var(--kinari);
  padding: 80px 0 32px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2.5fr 1fr 1fr 1fr;
  gap: 48px;
  margin-bottom: 64px;
}

.footer-logo {
  font-family: var(--mincho);
  font-size: 22px;
  font-weight: 500;
  margin-bottom: 16px;
  letter-spacing: 0.05em;
}

.footer-tagline {
  font-family: var(--mincho);
  font-size: 14px;
  color: var(--sage-soft);
  margin-bottom: 24px;
  letter-spacing: 0.05em;
}

.footer-info {
  font-size: 12px;
  color: var(--sage-soft);
  line-height: 2.0;
  letter-spacing: 0.05em;
}

.footer-col h4 {
  font-family: var(--serif-en);
  font-style: italic;
  font-size: 12px;
  color: var(--sage);
  letter-spacing: 0.2em;
  margin-bottom: 16px;
  font-weight: 500;
}

.footer-col a {
  display: block;
  font-size: 13px;
  color: var(--kinari);
  letter-spacing: 0.05em;
  margin-bottom: 10px;
  transition: opacity var(--t);
}

.footer-col a:hover { opacity: 0.5; }

.footer-bottom {
  border-top: 1px solid rgba(245, 241, 232, 0.15);
  padding-top: 24px;
  display: flex;
  justify-content: space-between;
  font-family: var(--serif-en);
  font-style: italic;
  font-size: 11px;
  color: var(--sage);
  letter-spacing: 0.1em;
}

/* ── Floating CTA ── */
.float-cta {
  position: fixed;
  bottom: 32px;
  right: 32px;
  background: var(--sage-deep);
  color: var(--washi);
  padding: 14px 28px;
  font-family: var(--mincho);
  font-size: 13px;
  letter-spacing: 0.15em;
  z-index: 99;
  box-shadow: 0 8px 24px rgba(74, 90, 66, 0.25);
  transition: all var(--t);
}

.float-cta:hover {
  background: var(--sumi);
  transform: translateY(-2px);
  box-shadow: 0 12px 32px rgba(0, 0, 0, 0.2);
}

.float-cta.is-hidden {
  opacity: 0;
  pointer-events: none;
  transform: translateY(8px);
}

/* ── Fade-in アニメーション ── */
[data-fade] {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}

[data-fade].is-visible {
  opacity: 1;
  transform: translateY(0);
}

/* ── Breadcrumb ── */
.breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  font-family: var(--serif-en);
  font-size: 11px;
  letter-spacing: 0.15em;
  color: var(--mute);
  margin-bottom: 32px;
}

.breadcrumb a { transition: color var(--t); }
.breadcrumb a:hover { color: var(--sage-deep); }
.breadcrumb span { color: var(--sage-soft); }

/* ── Page Coming Soon ── */
.page-coming-soon {
  min-height: 60vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 120px 32px;
}

.page-coming-soon .section-num { margin-bottom: 24px; }
.page-coming-soon h1 {
  font-family: var(--mincho);
  font-size: clamp(32px, 4vw, 48px);
  font-weight: 500;
  margin-bottom: 32px;
  letter-spacing: 0.08em;
}

.page-coming-soon p {
  font-size: 15px;
  color: var(--mute);
  line-height: 2.0;
  letter-spacing: 0.05em;
}

.page-coming-soon .link-arrow {
  margin-top: 48px;
}

/* ── Focus visible ── */
:focus-visible {
  outline: 2px solid var(--sage-deep);
  outline-offset: 3px;
}

/* ── Responsive ── */
@media (max-width: 900px) {
  .container,
  .container-narrow { padding: 0 20px; }

  section { padding: 80px 0; }

  .header-inner { padding: 16px 20px; }

  .nav-links,
  .cta-header { display: none; }

  .hamburger { display: flex; }

  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: 32px;
  }

  .footer-bottom {
    flex-direction: column;
    gap: 12px;
  }

  .float-cta {
    bottom: 16px;
    right: 16px;
    padding: 12px 20px;
    font-size: 12px;
  }

  .page-coming-soon { padding: 80px 20px; }
}

@media (max-width: 540px) {
  .footer-grid { grid-template-columns: 1fr; }
}