/* ============================================================
   CROSS YARD — Global CSS
   Design: Monochrome / Modern / Photo-first
   ============================================================ */

/* ---- Reset & Base ----------------------------------------- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { font-size: 16px; scroll-behavior: smooth; }
@media screen and (max-width: 1239px) and (min-width: 768px) {
  html { font-size: calc(16 / 1240 * 100vw); }
}
@media screen and (max-width: 767px) {
  html { font-size: calc(16 / 375 * 100vw); }
}
body {
  font-family: var(--font-ja);
  font-weight: 300;
  color: var(--text-dark);
  background: var(--white);
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
img { max-width: 100%; height: auto; display: block; }
a { color: inherit; text-decoration: none; }
ul, ol { list-style: none; }
button { cursor: pointer; border: none; background: none; font: inherit; }

/* ---- Design Tokens ---------------------------------------- */
:root {
  --black:      #0A0A0A;
  --dark:       #1A1A1A;
  --dark-mid:   #333333;
  --gray:       #888888;
  --gray-light: #CCCCCC;
  --gray-pale:  #F2F2F2;
  --white:      #FFFFFF;
  --accent:     #1A1A1A;
  --line-green: #06C755;
  --red:        #C5382A;
  --text-dark:  #1A1A1A;
  --text-mid:   #666666;
  --text-light: #999999;

  --radius:      0px;
  --radius-sm:   2px;
  --header-h:    64px;
  --transition:  0.4s ease;
  --font-en:     'DM Sans', 'Helvetica Neue', Arial, sans-serif;
  --font-ja:     'Noto Sans JP', 'Hiragino Sans', sans-serif;
  --section-pad: 100px 0;
  --grid-gap:    2px;
  --content-w:   1200px;
  --content-pad: 0 40px;
}

/* ---- Typography ------------------------------------------- */
.en-hero {
  font-family: var(--font-en);
  font-size: clamp(3rem, 8vw, 6rem);
  font-weight: 300;
  letter-spacing: 0.05em;
  line-height: 1.1;
}
.en-label {
  font-family: var(--font-en);
  font-size: 0.75rem;
  font-weight: 400;
  letter-spacing: 0.2em;
  text-transform: uppercase;
}
.en-heading {
  font-family: var(--font-en);
  font-size: clamp(1.75rem, 4vw, 3rem);
  font-weight: 300;
  letter-spacing: 0.05em;
}
.ja-heading {
  font-family: var(--font-ja);
  font-size: clamp(1.375rem, 3vw, 1.875rem);
  font-weight: 400;
  line-height: 1.7;
}
.ja-body {
  font-family: var(--font-ja);
  font-size: 1rem;
  font-weight: 300;
  line-height: 2.1;
  color: var(--text-mid);
}

/* ---- Scroll Fade-in --------------------------------------- */
.fi {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.8s ease, transform 0.8s ease;
}
.fi.visible {
  opacity: 1;
  transform: translateY(0);
}
.fi-d1 { transition-delay: 0.1s; }
.fi-d2 { transition-delay: 0.2s; }
.fi-d3 { transition-delay: 0.3s; }
.fi-d4 { transition-delay: 0.4s; }

/* ---- Section Layout --------------------------------------- */
.section { padding: var(--section-pad); }
.section-inner {
  max-width: var(--content-w);
  margin: 0 auto;
  padding: var(--content-pad);
}
.section-header {
  margin-bottom: 60px;
}
.section-header .en-label {
  display: block;
  color: var(--text-light);
  margin-bottom: 12px;
}
.section-header .en-heading {
  display: block;
}

/* ---- Header ----------------------------------------------- */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1000;
  height: var(--header-h);
  transition: background var(--transition), box-shadow var(--transition);
}
.site-header.scrolled {
  background: rgba(255, 255, 255, 0.97);
  box-shadow: 0 1px 0 var(--gray-light);
}
/* ライト背景ページ（page-banner）用：初期状態からダーク文字 */
.site-header.header--light:not(.scrolled) .logo { color: var(--black); }
.site-header.header--light:not(.scrolled) .global-nav a { color: var(--dark-mid); }
.site-header.header--light:not(.scrolled) .btn-line-header {
  border-color: var(--black);
  color: var(--black);
}
.site-header.header--light:not(.scrolled) .hamburger span { background: var(--black); }
.header-inner {
  max-width: var(--content-w);
  margin: 0 auto;
  padding: 0 40px;
  height: 100%;
  display: flex;
  align-items: center;
  gap: 40px;
}
.logo {
  flex-shrink: 0;
  display: flex;
  align-items: center;
}
.logo-img {
  height: 44px;
  width: auto;
  filter: brightness(0) invert(1);
  transition: filter var(--transition);
}
/* スクロール後：黒ロゴ */
.site-header.scrolled .logo-img { filter: brightness(0); }
/* ライト背景ページ：初期から黒ロゴ */
.site-header.header--light:not(.scrolled) .logo-img { filter: brightness(0); }

.global-nav { margin-left: auto; }
.global-nav ul {
  display: flex;
  align-items: center;
  gap: 32px;
}
.global-nav a {
  font-family: var(--font-en);
  font-size: 1rem;
  font-weight: 400;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: rgba(255,255,255,0.85);
  transition: color var(--transition);
  position: relative;
}
.global-nav a::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 0;
  height: 1px;
  background: currentColor;
  transition: width var(--transition);
}
.global-nav a:hover::after,
.global-nav a.is-current::after { width: 100%; }
.site-header.scrolled .global-nav a { color: var(--dark-mid); }
.global-nav a.is-current { color: var(--white); }
.site-header.scrolled .global-nav a.is-current { color: var(--black); }

.btn-line-header {
  font-family: var(--font-ja);
  font-size: 0.9rem;
  font-weight: 400;
  letter-spacing: 0.08em;
  padding: 9px 18px;
  background: var(--white);
  color: var(--black);
  border: 1px solid var(--white);
  transition: background var(--transition), color var(--transition), border-color var(--transition);
  flex-shrink: 0;
}
.site-header.scrolled .btn-line-header {
  background: var(--black);
  color: var(--white);
  border-color: var(--black);
}
.btn-line-header:hover {
  background: var(--gray-light);
  color: var(--black);
  border-color: var(--gray-light);
}

/* ---- Hamburger -------------------------------------------- */
.hamburger {
  display: none;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  width: 40px;
  height: 40px;
  gap: 6px;
  margin-left: auto;
}
.hamburger span {
  display: block;
  width: 24px;
  height: 1px;
  background: var(--white);
  transition: transform var(--transition), opacity var(--transition), background var(--transition);
}
.site-header.scrolled .hamburger span { background: var(--black); }
.hamburger.is-open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.hamburger.is-open span:nth-child(2) { opacity: 0; }
.hamburger.is-open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ---- Nav Overlay ------------------------------------------ */
.nav-overlay {
  position: fixed;
  inset: 0;
  background: var(--black);
  z-index: 999;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.5s ease;
}
.nav-overlay.is-open {
  opacity: 1;
  pointer-events: all;
}
.overlay-close {
  position: absolute;
  top: 20px;
  right: 30px;
  font-family: var(--font-en);
  font-size: 2rem;
  font-weight: 200;
  color: var(--white);
  line-height: 1;
}
.overlay-nav { text-align: center; }
.overlay-nav ul { margin-bottom: 48px; }
.overlay-nav li { margin-bottom: 28px; }
.overlay-nav a {
  font-family: var(--font-en);
  font-size: clamp(1.5rem, 5vw, 2.25rem);
  font-weight: 300;
  letter-spacing: 0.15em;
  color: var(--white);
  transition: opacity var(--transition);
}
.overlay-nav a:hover { opacity: 0.5; }
.btn-line-overlay {
  display: inline-block;
  font-family: var(--font-en);
  font-size: 0.8rem;
  font-weight: 400;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  padding: 14px 36px;
  border: 1px solid rgba(255,255,255,0.5);
  color: var(--white);
  transition: border-color var(--transition), background var(--transition);
}
.btn-line-overlay:hover {
  border-color: var(--white);
  background: rgba(255,255,255,0.1);
}

/* ---- Page Title Banner ------------------------------------ */
.page-banner {
  padding: 160px 0 80px;
  background: var(--gray-pale);
}
.page-banner .section-inner { display: flex; align-items: flex-end; gap: 24px; }
.page-banner .en-heading { line-height: 1; }
.page-banner .ja-label {
  font-family: var(--font-ja);
  font-size: 0.8rem;
  font-weight: 300;
  color: var(--text-light);
  margin-bottom: 6px;
}

/* ---- Buttons --------------------------------------------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-en);
  font-size: 1rem;
  font-weight: 400;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  padding: 14px 28px;
  border: 1px solid var(--black);
  color: var(--black);
  transition: background var(--transition), color var(--transition);
}
.btn:hover { background: var(--black); color: var(--white); }
.btn--sm {
  font-size: 0.8rem;
  padding: 10px 20px;
}
.btn--lg {
  font-size: 1.2rem;
  padding: 18px 40px;
}
.btn-fill {
  background: var(--black);
  color: var(--white);
}
.btn-fill:hover { background: var(--dark-mid); border-color: var(--dark-mid); }
.btn-line {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  background: var(--line-green);
  color: var(--white);
  font-family: var(--font-ja);
  font-size: 1rem;
  font-weight: 400;
  padding: 16px 36px;
  transition: opacity var(--transition);
}
.btn-line:hover { opacity: 0.85; }
/* CTA内のボタン */
.cta-strip .btn-line,
.cta-strip .btn {
  font-family: var(--font-ja);
  font-size: 1rem;
  letter-spacing: 0.08em;
  text-transform: none;
  padding: 14px 32px;
}
.btn-arrow::after {
  content: '→';
  transition: transform var(--transition);
}
.btn-arrow:hover::after { transform: translateX(4px); }

/* ---- CTA Strip -------------------------------------------- */
.cta-strip {
  padding: 80px 0;
  background: var(--black);
  text-align: center;
}
.cta-strip .en-heading { color: var(--white); margin-bottom: 12px; }
.cta-strip .ja-body { color: rgba(255,255,255,0.6); margin-bottom: 40px; }
.cta-strip .btn-group { display: flex; align-items: center; justify-content: center; gap: 20px; flex-wrap: wrap; }

/* ---- Footer ----------------------------------------------- */
.site-footer {
  background: var(--black);
  padding: 80px 0 40px;
}
.footer-inner {
  max-width: var(--content-w);
  margin: 0 auto;
  padding: var(--content-pad);
}
.footer-logo {
  margin-bottom: 40px;
}
.footer-logo-img {
  height: 36px;
  width: auto;
  filter: brightness(0) invert(1);
}
.footer-nav { margin-bottom: 40px; }
.footer-nav ul {
  display: flex;
  flex-wrap: wrap;
  gap: 16px 32px;
}
.footer-nav a {
  font-family: var(--font-en);
  font-size: 0.7rem;
  font-weight: 400;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: rgba(255,255,255,0.5);
  transition: color var(--transition);
}
.footer-nav a:hover { color: var(--white); }
.footer-info { margin-bottom: 24px; }
.footer-address,
.footer-phone {
  font-family: var(--font-ja);
  font-size: 0.8rem;
  font-weight: 300;
  color: rgba(255,255,255,0.5);
  line-height: 2;
}
.footer-phone a:hover { color: var(--white); }
.footer-sns { margin-bottom: 40px; }
.footer-sns a { color: rgba(255,255,255,0.5); transition: color var(--transition); }
.footer-sns a:hover { color: var(--white); }
.footer-copy {
  font-family: var(--font-en);
  font-size: 0.7rem;
  font-weight: 300;
  letter-spacing: 0.1em;
  color: rgba(255,255,255,0.3);
  border-top: 1px solid rgba(255,255,255,0.1);
  padding-top: 24px;
}

/* ---- Utility ---------------------------------------------- */
.visually-hidden {
  position: absolute;
  width: 1px; height: 1px;
  padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0,0,0,0);
  white-space: nowrap; border: 0;
}

/* ---- Responsive ------------------------------------------- */
@media (max-width: 1024px) {
  :root { --content-pad: 0 24px; }
  .global-nav ul { gap: 20px; }
}

@media (max-width: 768px) {
  :root { --section-pad: 72px 0; --content-pad: 0 20px; }
  .global-nav, .btn-line-header { display: none; }
  .hamburger { display: flex; }
  .header-inner { padding: 0 20px; }
}

@media (max-width: 600px) {
  :root { --section-pad: 60px 0; }
  .page-banner { padding: 120px 0 60px; }
}