/* =========================================================
   第4工程: 将来ページ増加を見据えた共通PCナビ
   - PC: 必要に応じて関連ページをドロップダウンへ集約
   - mobile: 従来どおりフラットなハンバーガーメニュー
   ========================================================= */

.desktop-nav{
  gap:22px;
}
.desktop-nav > a,
.nav-group-toggle{
  font-size:14px;
}
.desktop-nav a[aria-current="page"]{
  text-decoration:underline;
  text-decoration-thickness:2px;
  text-underline-offset:7px;
}

.nav-group{
  position:relative;
  display:flex;
  align-items:center;
}
.nav-group-toggle{
  display:inline-flex;
  align-items:center;
  gap:5px;
  padding:8px 2px;
  border:0;
  background:transparent;
  color:var(--navy);
  font:inherit;
  font-weight:700;
  white-space:nowrap;
  cursor:pointer;
}
.nav-group-toggle span{
  font-size:12px;
  transform:translateY(-1px);
}
.nav-group.is-current .nav-group-toggle{
  text-decoration:underline;
  text-decoration-thickness:2px;
  text-underline-offset:7px;
}
.nav-dropdown{
  position:absolute;
  top:calc(100% + 8px);
  left:50%;
  z-index:50;
  min-width:210px;
  padding:8px;
  display:grid;
  gap:2px;
  opacity:0;
  visibility:hidden;
  transform:translate(-50%, -4px);
  transition:opacity .18s ease, transform .18s ease, visibility .18s ease;
  border:1px solid rgba(201,178,124,.55);
  border-radius:16px;
  background:rgba(255,253,248,.98);
  box-shadow:0 16px 34px rgba(58,42,18,.13);
}
.nav-dropdown::before{
  content:"";
  position:absolute;
  left:0;
  right:0;
  top:-12px;
  height:12px;
}
.nav-dropdown a{
  display:block;
  padding:10px 12px;
  border-radius:10px;
  color:var(--navy);
  text-decoration:none!important;
  font-size:13px;
  line-height:1.45;
  white-space:nowrap;
}
.nav-dropdown a:hover,
.nav-dropdown a:focus-visible{
  background:var(--blue-soft);
  outline:none;
}
.nav-group:hover .nav-dropdown,
.nav-group:focus-within .nav-dropdown{
  opacity:1;
  visibility:visible;
  transform:translate(-50%, 0);
}

/* 860pxより上でもノートPC幅で窮屈になりにくくする */
@media (min-width:861px) and (max-width:1080px){
  .desktop-nav{gap:15px;font-size:13px}
  .desktop-nav > a,.nav-group-toggle{font-size:13px}
  .nav-cta{padding-left:14px!important;padding-right:14px!important}
  .logo-image{width:162px}
}

@media(max-width:860px){
  .desktop-nav{display:none!important}
  .mobile-menu a[aria-current="page"]{
    background:var(--blue-soft);
    border-radius:10px;
  }
}

/* =========================================================
   スマホ共通ヘッダー: 現在ページラベル
   - PCには影響させない
   - currentPage（page_key相当）から共通JSが自動生成
   - メニュー展開中は非表示
   ========================================================= */
.mobile-current-page{
  display:none;
}

@media(max-width:860px){
  .header-inner{
    display:grid;
    grid-template-columns:auto minmax(0,1fr) auto;
    align-items:center;
    gap:8px;
  }

  .logo-mark{
    min-width:0;
  }

  .mobile-current-page{
    display:block;
    justify-self:end;
    margin-right:2px;
    min-width:0;
    max-width:min(100%, 168px);
    padding:7px 10px;
    border:1px solid rgba(201,178,124,.64);
    border-radius:999px;
    background:rgba(255,253,248,.88);
    color:var(--navy);
    box-shadow:0 6px 18px rgba(80,60,30,.05);
    font-size:clamp(12px,3.3vw,13px);
    font-weight:800;
    line-height:1.25;
    letter-spacing:.02em;
    white-space:nowrap;
    overflow:hidden;
    text-overflow:ellipsis;
    text-align:center;
    pointer-events:none;
    transition:opacity .18s ease, visibility .18s ease;
  }

  .site-header.menu-open .mobile-current-page{
    opacity:0;
    visibility:hidden;
  }

  .menu-toggle{
    justify-self:end;
  }

  .mobile-menu a[aria-current="page"]{
    background:var(--blue-soft);
    border-radius:10px;
    box-shadow:inset 0 0 0 1px rgba(83,111,154,.08);
    font-weight:800;
  }
}

/* 375px前後でも「生徒の成長・実績」を1行で収める余白設計 */
@media(max-width:430px){
  .header-inner{
    padding-left:10px;
    padding-right:10px;
    gap:6px;
  }
  .logo-image{
    width:118px;
    max-width:32vw;
  }
  .mobile-current-page{
    max-width:min(42vw, 158px);
    padding:6px 8px;
    font-size:12px;
    letter-spacing:0;
  }
}

@media(max-width:375px){
  .logo-image{
    width:110px;
    max-width:30vw;
  }
  .mobile-current-page{
    padding-left:7px;
    padding-right:7px;
  }
}