/* ==========================================================
   共通レイアウト：ヘッダー / フッター
   ※ 色はすべて css/common.css の :root 変数を使用
   ※ js/common.js が使う id/class：#common_header、.common_header__toggle、#common_header_drawer、.common_header--lock
   ========================================================== */
html.common_header--lock { overflow: hidden; }

.common_header {
  position: fixed;
  inset: 0 0 auto 0;
  z-index: 100;
  height: 80px;
  background: rgba(255, 255, 255, 0.96);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--color-line);
}
@media (max-width: 767px) {
  .common_header { height: 60px; }
}

.common_header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
  padding-inline: var(--gutter);
}

.common_header__logo {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  color: var(--color-text);
}
.common_header__logo img { width: 36px; height: 36px; }
@media (max-width: 767px) {
  .common_header__logo img { width: 30px; height: 30px; }
}
.common_header__logo-text { display: flex; flex-direction: column; line-height: 1.25; }
.common_header__logo-ja { font-family: var(--font-mincho); font-size: 19px; font-weight: 700; letter-spacing: 0.06em; }
.common_header__logo-en { font-family: var(--font-en); font-size: 11px; letter-spacing: 0.2em; color: var(--color-accent); }
@media (max-width: 767px) {
  .common_header__logo-ja { font-size: 17px; }
}

.common_header__nav { display: none; }
@media (min-width: 1200px) {
  .common_header__nav { display: block; }
}
.common_header__list { display: flex; align-items: center; gap: 36px; }
.common_header__link {
  position: relative;
  font-size: 14px;
  letter-spacing: 0.1em;
  padding-block: 8px;
}
.common_header__link::after {
  content: "";
  position: absolute;
  left: 0; right: 0; bottom: 0;
  height: 1px;
  background: var(--color-brand);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.3s ease;
}
.common_header__link:hover::after,
.common_header__link[aria-current="page"]::after { transform: scaleX(1); }

.common_header__cta {
  display: inline-block;
  padding: 10px 24px;
  border-radius: 4px;
  background: var(--color-brand);
  color: var(--color-white);
  font-size: 14px;
  letter-spacing: 0.08em;
  transition: background-color 0.3s ease;
}
.common_header__cta:hover { background: var(--color-brand-dark); }

.common_header__toggle {
  position: relative;
  width: 44px;
  height: 44px;
}
@media (min-width: 1200px) {
  .common_header__toggle { display: none; }
}
.common_header__toggle-bar,
.common_header__toggle-bar::before {
  position: absolute;
  left: 11px;
  width: 22px;
  height: 1px;
  background: var(--color-text);
  transition: transform 0.3s ease, top 0.3s ease;
}
.common_header__toggle-bar { top: 21px; }
.common_header__toggle-bar::before { content: ""; top: 7px; left: 0; }
.common_header.is-open .common_header__toggle-bar { transform: rotate(45deg); }
.common_header.is-open .common_header__toggle-bar::before { top: 0; transform: rotate(-90deg); }

.common_header__drawer {
  position: fixed;
  inset: 60px 0 0 0;
  z-index: 99;
  padding: 32px var(--gutter);
  background: var(--color-base);
  overflow-y: auto;
}
.common_header__drawer[hidden] { display: none; }
.common_header__drawer-link {
  display: block;
  padding: 18px 0;
  border-bottom: 1px solid var(--color-line);
  font-weight: 500;
  font-size: 16px;
  letter-spacing: 0.06em;
}

/* ---------- フッター ---------- */
.common_footer {
  padding-block: 80px 32px;
  background: var(--color-dark);
  color: var(--color-white);
}
@media (max-width: 767px) {
  .common_footer { padding-block: 56px 24px; }
}
.common_footer__top {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 48px;
  padding-bottom: 48px;
  border-bottom: 1px solid var(--color-overlay-white);
}
@media (max-width: 767px) {
  .common_footer__top { flex-direction: column; align-items: center; gap: 36px; text-align: center; }
  .common_footer__top .common_footer__info { text-align: center; }
}
.common_footer__name { margin: 0 0 16px; font-family: var(--font-mincho); font-size: 22px; font-weight: 700; letter-spacing: 0.06em; }
.common_footer__info { margin: 0; font-size: 13px; line-height: 2; opacity: 0.85; text-align: start; }
.common_footer__list { display: grid; grid-template-columns: repeat(2, auto); gap: 12px 48px; font-size: 14px; letter-spacing: 0.08em; }
.common_footer__link:hover { opacity: 0.7; }
.common_footer__copy { margin: 32px 0 0; text-align: center; font-size: 12px; letter-spacing: 0.1em; opacity: 0.7; }