/* ===== Layout: Header / Footer / Container / Decoration ===== */

/* --- Container --- */
.container {
  width: 100%;
  max-width: var(--max-width);
  margin-inline: auto;
  padding-inline: var(--container-padding);
}

.container--text {
  max-width: var(--max-width-text);
}

.container--narrow {
  max-width: var(--max-width-narrow);
}

/* --- Section base --- */
.section {
  padding-block: var(--space-xl);
  position: relative;
}

.section--compact {
  padding-block: var(--space-lg);
}

.section--soft {
  background-color: var(--color-bg-soft);
}

/* 明るい青背景セクション(セクション間のリズムをつくる) */
.section--bright {
  background-color: var(--color-bg-bright);
}

/* 名刺デザイン継承:ターコイズの薄いアクセント */
.section--accent {
  background:
    linear-gradient(135deg, var(--color-bg-bright) 0%, var(--color-sky) 100%);
  position: relative;
  overflow: hidden;
}

/* --- Header --- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background-color: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--color-border-soft);
}

.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
  width: 100%;
  max-width: var(--max-width);
  margin-inline: auto;
  padding-inline: var(--container-padding);
}

.site-header__logo {
  display: inline-flex;
  align-items: center;
  height: 44px;
  color: var(--color-navy);
}

.site-header__logo img {
  height: 100%;
  width: auto;
  /* 1.svg は 3:2 横長フォーマット内にロゴが配置されているため、
     ヘッダー内では高さを基準にして自然に収める */
  display: block;
}

.site-header__logo:hover,
.site-header__logo:focus-visible {
  opacity: 0.8;
}

/* --- Navigation --- */
.site-nav__list {
  display: flex;
  gap: var(--space-md);
  align-items: center;
}

.site-nav__item a {
  display: inline-flex;
  flex-direction: column;
  align-items: center;
  font-family: var(--font-sans-jp);
  font-size: 0.95rem;
  font-weight: 500;
  letter-spacing: 0.04em;
  color: var(--color-text-strong);
  padding: 0.5rem 0;
  position: relative;
  line-height: 1.2;
  gap: 2px;
}

.site-nav__item a .nav-jp {
  display: block;
}

.site-nav__item a .nav-en {
  display: block;
  font-family: var(--font-sans-en);
  font-size: 0.65rem;

  letter-spacing: var(--tracking-wide);
  color: var(--color-text-soft);
  font-weight: 400;
  text-transform: capitalize;
  line-height: 1;
}

.site-nav__item a::after {
  content: '';
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 1px;
  background-color: var(--color-turquoise);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--transition-base);
}

.site-nav__item a:hover::after,
.site-nav__item a:focus-visible::after,
.site-nav__item a[aria-current="page"]::after {
  transform: scaleX(1);
}

.site-nav__item a:hover,
.site-nav__item a:focus-visible {
  opacity: 1;
}

/* Mobile menu toggle */
.site-nav__toggle {
  display: none;
  width: 44px;
  height: 44px;
  align-items: center;
  justify-content: center;
  color: var(--color-text-strong);
}

.site-nav__toggle-icon,
.site-nav__toggle-icon::before,
.site-nav__toggle-icon::after {
  display: block;
  width: 22px;
  height: 1.5px;
  background-color: currentColor;
  position: relative;
  transition: transform var(--transition-base), opacity var(--transition-base);
}

.site-nav__toggle-icon::before,
.site-nav__toggle-icon::after {
  content: '';
  position: absolute;
  left: 0;
}

.site-nav__toggle-icon::before { top: -7px; }
.site-nav__toggle-icon::after  { top: 7px; }

.site-nav__toggle[aria-expanded="true"] .site-nav__toggle-icon {
  background-color: transparent;
}

.site-nav__toggle[aria-expanded="true"] .site-nav__toggle-icon::before {
  top: 0;
  transform: rotate(45deg);
}

.site-nav__toggle[aria-expanded="true"] .site-nav__toggle-icon::after {
  top: 0;
  transform: rotate(-45deg);
}

/* --- Footer --- */
.site-footer {
  background-color: var(--color-navy);
  color: var(--color-white);
  padding-block: var(--space-lg) var(--space-md);
  margin-top: var(--space-xl);
  position: relative;
  overflow: hidden;
}

.site-footer__motto {
  font-family: var(--font-sans-en);

  font-size: clamp(1.5rem, 3vw, 2.25rem);
  letter-spacing: var(--tracking-tight);
  text-align: center;
  margin-bottom: var(--space-lg);
  color: var(--color-white);
}

.site-footer__inner {
  display: grid;
  gap: var(--space-md);
  grid-template-columns: 1fr;
  border-top: 1px solid rgba(255, 255, 255, 0.15);
  padding-top: var(--space-md);
}

.site-footer__group h3 {
  font-family: var(--font-sans-en);
  font-size: 0.8rem;
  letter-spacing: var(--tracking-widest);
  text-transform: uppercase;
  color: rgba(255, 255, 255, 0.6);
  margin-bottom: var(--space-sm);
  font-weight: 500;
}

.site-footer__group ul {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.site-footer__group a {
  color: rgba(255, 255, 255, 0.85);
  font-size: var(--text-small);
}

.site-footer__group a:hover {
  color: var(--color-white);
  opacity: 1;
}

.site-footer__meta {
  margin-top: var(--space-md);
  padding-top: var(--space-md);
  border-top: 1px solid rgba(255, 255, 255, 0.15);
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-sm) var(--space-md);
  justify-content: space-between;
  font-size: var(--text-xsmall);
  color: rgba(255, 255, 255, 0.5);
  letter-spacing: 0.05em;
}

.site-footer__address {
  font-style: normal;
}

/* --- Decoration (rings / stripes) --- */
.decoration {
  position: absolute;
  pointer-events: none;
  user-select: none;
  z-index: 0;
}

.decoration--rings {
  color: var(--color-turquoise);
  opacity: 0.12;
}

.decoration--stripes {
  color: var(--color-navy);
}

.decoration--top-right {
  top: -10%;
  right: -10%;
  width: 50%;
  max-width: 600px;
}

.decoration--bottom-left {
  bottom: -15%;
  left: -10%;
  width: 45%;
  max-width: 500px;
}

.decoration--bottom-right {
  bottom: 0;
  right: 0;
  width: 30%;
  max-width: 300px;
}

.decoration--center {
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 80%;
  max-width: 800px;
}

/* Footer 内装飾は控えめに */
.site-footer .decoration {
  opacity: 0.08;
}

/* 背景写真があるヒーローでは装飾SVGを出さない(写真と装飾が混ざる問題を回避) */
.hero:has(.hero__bg) .decoration,
.business-hero--with-bg .decoration,
.philosophy-hero:has(.philosophy-hero__bg) .decoration {
  display: none;
}

/* --- Page intro --- */
.page-intro {
  padding-block: var(--space-lg) var(--space-md);
  text-align: left;
}

.page-intro__label {
  font-family: var(--font-sans-en);
  font-size: var(--text-small);
  letter-spacing: var(--tracking-widest);
  text-transform: uppercase;
  color: var(--color-blue);
  margin-bottom: var(--space-sm);
  display: block;
}

.page-intro__title {
  font-size: clamp(2.25rem, 5vw, 3.5rem);
  margin-bottom: var(--space-sm);
  letter-spacing: var(--tracking-tight);
}

.page-intro__lead {
  font-size: var(--text-lead);
  color: var(--color-text);
  max-width: var(--max-width-text);
  font-family: var(--font-sans-jp);
}

/* ===== Responsive ===== */
@media (max-width: 767px) {
  .site-nav__toggle {
    display: inline-flex;
  }

  .site-nav__list {
    position: fixed;
    inset: 72px 0 0 0;
    background-color: var(--color-white);
    flex-direction: column;
    gap: 0;
    padding: var(--space-md);
    transform: translateX(100%);
    transition: transform var(--transition-base);
    border-top: 1px solid var(--color-border-soft);
  }

  .site-nav__list[data-open="true"] {
    transform: translateX(0);
  }

  .site-nav__item {
    width: 100%;
    border-bottom: 1px solid var(--color-border-soft);
  }

  .site-nav__item a {
    flex-direction: row;
    align-items: baseline;
    justify-content: space-between;
    padding: var(--space-sm) 0;
    font-size: 1.05rem;
    gap: var(--space-sm);
    width: 100%;
  }

  .site-nav__item a .nav-en {
    font-size: 0.75rem;
  }

  .site-nav__item a::after {
    display: none;
  }

  .section {
    padding-block: var(--space-lg);
  }

  .site-footer {
    margin-top: var(--space-lg);
  }
}

@media (min-width: 768px) {
  .site-footer__inner {
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-lg);
  }
}