/* =============================================
   Wing Theme — Layout (Header / Footer)
   ============================================= */

/* --- Header: ハンバーガーメニューのみ --- */
.site-header {
  position: fixed;
  top: 0;
  right: 0;
  z-index: var(--z-header);
  padding: var(--sp-3) var(--sp-4);
  pointer-events: none;  /* クリックを通す。子要素で個別に有効化 */
}
.site-header__inner {
  pointer-events: auto;
}
.site-header__logo,
.site-header__nav-wrap {
  /* 通常時はロゴもグローバルナビも表示しない(Wix踏襲) */
  display: none;
}
.site-header__menu-btn {
  pointer-events: auto;
  width: 40px;
  height: 40px;
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
}
.site-header__menu-btn::before {
  content: '';
  position: absolute;
  inset: 0;
  width: 30px;
  height: 22px;
  margin: auto;
}
.site-header__menu-btn-icon {
  position: relative;
  width: 30px;
  height: 22px;
  display: block;
}
.site-header__menu-btn-icon span {
  position: absolute;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--color-white);
  transition: transform var(--dur-fast) var(--ease-out),
              opacity var(--dur-fast) var(--ease-out),
              top var(--dur-fast) var(--ease-out),
              background var(--dur-fast) var(--ease-out);
}
.site-header__menu-btn-icon span:nth-child(1) { top: 0; }
.site-header__menu-btn-icon span:nth-child(2) { top: 50%; transform: translateY(-50%); }
.site-header__menu-btn-icon span:nth-child(3) { top: 100%; }

/* スクロールが進むとアイコンの色が変わる(背景が明るくなるため) */
.site-header.is-on-light .site-header__menu-btn-icon span {
  background: var(--color-ink);
}

/* メニュー開状態 */
.site-header.is-menu-open .site-header__menu-btn-icon span {
  background: var(--color-ink);
}
.site-header.is-menu-open .site-header__menu-btn-icon span:nth-child(1) {
  top: 50%; transform: translateY(-50%) rotate(45deg);
}
.site-header.is-menu-open .site-header__menu-btn-icon span:nth-child(2) { opacity: 0; }
.site-header.is-menu-open .site-header__menu-btn-icon span:nth-child(3) {
  top: 50%; transform: translateY(-50%) rotate(-45deg);
}

/* --- Overlay Menu --- */
.site-nav-overlay {
  position: fixed;
  inset: 0;
  z-index: calc(var(--z-header) - 1);
  background: var(--bg-day);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  visibility: hidden;
  transition: opacity var(--dur-mid) var(--ease-out),
              visibility var(--dur-mid) var(--ease-out);
}
.site-header.is-menu-open ~ .site-nav-overlay {
  opacity: 1;
  visibility: visible;
}
.site-nav-overlay__menu {
  display: flex;
  flex-direction: column;
  gap: var(--sp-3);
  align-items: center;
}
.site-nav-overlay__menu a {
  font-size: clamp(1.25rem, 3vw, 1.75rem);
  font-weight: 700;
  letter-spacing: 0.06em;
  color: var(--color-ink);
  position: relative;
}
.site-nav-overlay__menu a::after {
  content: '';
  position: absolute;
  left: 0;
  right: 0;
  bottom: -4px;
  height: 2px;
  background: var(--wing-blue);
  transform: scaleX(0);
  transform-origin: center;
  transition: transform var(--dur-fast) var(--ease-out);
}
.site-nav-overlay__menu a:hover {
  opacity: 1;
}
.site-nav-overlay__menu a:hover::after {
  transform: scaleX(1);
}

/* メニューが開いている間はスクロール禁止 */
body.menu-open {
  overflow: hidden;
}

/* --- Footer (ミニマル) --- */
.site-footer {
  background: var(--bg-footer);
  color: var(--color-ink);
  padding: var(--sp-5) 0 var(--sp-4);
  position: relative;
  z-index: var(--z-content);
}
.site-footer__inner {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--container-pad);
  text-align: center;
}

.site-footer__menu {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: var(--sp-4);
  margin-bottom: var(--sp-3);
}
.site-footer__menu a {
  font-size: var(--fs-small);
  font-weight: 700;
  letter-spacing: 0.06em;
  color: var(--color-ink);
}

.site-footer__sub {
  display: flex;
  justify-content: center;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--sp-3);
  font-size: var(--fs-xsmall);
  letter-spacing: 0.06em;
}
.site-footer__sub a {
  color: var(--color-ink);
  font-weight: 700;
}
.site-footer__copyright {
  font-weight: 700;
}

/* note最新記事(フッター上部、希望時) */
.site-footer__note {
  background: var(--bg-day);
  padding: var(--sp-6) 0;
  border-top: 1px solid var(--color-line);
  position: relative;
  z-index: var(--z-content);
}
.site-footer__note .site-footer__inner {
  text-align: left;
}
.site-footer__note-heading {
  font-size: var(--fs-small);
  font-weight: 700;
  letter-spacing: 0.2em;
  color: var(--color-ink-mute);
  margin-bottom: var(--sp-3);
  text-align: center;
}

.note-list {
  display: grid;
  gap: 0;
  max-width: 760px;
  margin: 0 auto;
}
.note-list__item a {
  display: grid;
  grid-template-columns: 110px 1fr;
  gap: var(--sp-3);
  align-items: baseline;
  padding: var(--sp-2) 0;
  border-bottom: 1px solid var(--color-line);
  transition: padding-left var(--dur-fast) var(--ease-out);
}
.note-list__item:last-child a { border-bottom: none; }
.note-list__item a:hover {
  padding-left: var(--sp-2);
  opacity: 1;
}
.note-list__date {
  font-size: var(--fs-small);
  font-weight: 500;
  color: var(--color-ink-mute);
  letter-spacing: 0.05em;
}
.note-list__title {
  font-size: var(--fs-small);
  line-height: 1.7;
  color: var(--color-ink);
}

@media (max-width: 640px) {
  .note-list__item a {
    grid-template-columns: 1fr;
    gap: var(--sp-1);
  }
  .site-footer__menu {
    gap: var(--sp-2) var(--sp-3);
  }
}

/* SNSリンク(Wing本体のみ: note, Wantedly, engage) */
.sns-links {
  display: flex;
  justify-content: center;
  gap: var(--sp-3);
  margin: var(--sp-3) 0;
}
.sns-links__item a {
  display: inline-flex;
  align-items: center;
  gap: var(--sp-1);
  font-size: var(--fs-small);
  letter-spacing: 0.06em;
  color: var(--color-ink);
  font-weight: 700;
  padding: var(--sp-1) var(--sp-2);
  border: 1px solid var(--color-line);
  border-radius: 999px;
  transition: background var(--dur-fast) var(--ease-out),
              color var(--dur-fast) var(--ease-out),
              border-color var(--dur-fast) var(--ease-out);
}
.sns-links__item a:hover {
  background: var(--color-ink);
  color: var(--color-white);
  border-color: var(--color-ink);
  opacity: 1;
}
.sns-links__icon {
  width: 16px;
  height: 16px;
  display: inline-flex;
}
.sns-links__icon svg { width: 100%; height: 100%; fill: currentColor; }