/* =========================================================
   NAV OVERRIDE (page-side)
   - HTML構造は固定のまま
   - nav.css?v=4 の上書き専用（このファイルは上書き用途）
========================================================= */

/* ============== Header base ============== */
.site-header{
    position: fixed;
    top: 0; left: 0; right: 0;
    z-index: 999999;
  
    background: rgba(241,241,241,.86);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border-bottom: 1px solid rgba(15,15,16,.08);
  }
  
  /* ヘッダー内の横並び */
  .site-header .container.nav{
    display:flex;
    align-items:center;
    justify-content:space-between;
    gap: 16px;
    padding: 14px 0;
  }
  
  /* ブランド */
  .site-header .brand{
    display:flex;
    align-items:center;
    height: 40px;
    gap: 10px;
  }
  
  .brand-logo{
    height: 40px;
    width:auto;
    display:block;
  }
  
  /* ul/li のデフォルト潰し */
  .site-header .nav-list{
    margin:0;
    padding:0;
    list-style:none;
  }
  .site-header .nav-list li{
    margin:0;
    padding:0;
  }
  
  /* リンク */
  .site-header .nav-list a{
    display:inline-flex;
    align-items:center;
    height: 40px;
    padding: 0 12px;
    border-radius: 999px;
  
    font-size: 12px;
    letter-spacing: .12em;
    color: rgba(15,15,16,.78);
  
    transition: background .2s ease, border-color .2s ease, color .2s ease;
    border: 1px solid transparent;
  }
  .site-header .nav-list a:hover{
    background: rgba(15,15,16,.04);
    border-color: rgba(15,15,16,.10);
  }
  
  /* ============== PC layout ============== */
  @media (min-width: 901px){
    .menu-toggle{ display:none; }
  
    nav#nav-primary.nav-drawer{
      position: static;
      transform:none;
      background: transparent;
      box-shadow:none;
      width:auto;
      height:auto;
      padding:0;
    }
  
    .site-header .nav-list{
      display:flex;
      align-items:center;
      gap: 8px;
    }
  }
  
  /* ============== Mobile layout / Drawer ============== */
  @media (max-width: 900px){
  
    /* ✅ 指示どおり：レスポンシブ時はヘッダー内padding 0 */
    .site-header .container.nav{
      padding: 0;
      min-height: 64px; /* padding消す代わりに高さを確保 */
    }
  
    /* ハンバーガーボタン */
    .menu-toggle{
      display:inline-flex;
      align-items:center;
      justify-content:center;
      width: 44px;
      height: 44px;
      border-radius: 999px;
  
      border: 1px solid rgba(15,15,16,.14);
      background: rgba(255,255,255,.65);
      cursor:pointer;
  
      position: relative;
      z-index: 2000;   /* drawerより上 */
      overflow: visible;
    }
  
    /* ===== 3本線（完全センター固定） =====
       ここが “ズレない肝”。
       擬似要素は top/bottom を使わず、transform だけで上下移動させる。
    */
    .menu-toggle__lines{
      position: relative;
      width: 18px;
      height: 2px;
      border-radius: 2px;
      background: rgba(15,15,16,.75);
      display:block;
  
      transition: background .25s ease;
    }
  
    .menu-toggle__lines::before,
    .menu-toggle__lines::after{
      content:"";
      position:absolute;
      left:0;
      top:0;                 /* ✅ 基準は常に中央 */
      width: 18px;
      height: 2px;
      border-radius: 2px;
      background: rgba(15,15,16,.75);
      transform-origin: center;
  
      transition: transform .25s ease;
    }
  
    /* 初期：上と下に等間隔 */
    .menu-toggle__lines::before{ transform: translateY(-6px); }
    .menu-toggle__lines::after { transform: translateY( 6px); }
  
    /* 開いたら×：中央線を消して、上下を中心で回転 */
    .menu-toggle[aria-expanded="true"] .menu-toggle__lines{
      background: transparent;
    }
    .menu-toggle[aria-expanded="true"] .menu-toggle__lines::before{
      transform: rotate(45deg);
    }
    .menu-toggle[aria-expanded="true"] .menu-toggle__lines::after{
      transform: rotate(-45deg);
    }
  
    /* ドロワー本体 */
    nav#nav-primary.nav-drawer{
      position: fixed;
      top: 0;
      right: 0;
  
      width: min(82vw, 340px);
      height: 100vh;
  
      padding: 84px 18px 18px;
      background: rgba(255,255,255,.92);
      backdrop-filter: blur(12px);
      -webkit-backdrop-filter: blur(12px);
  
      border-left: 1px solid rgba(15,15,16,.10);
      box-shadow: 0 30px 80px rgba(0,0,0,.18);
  
      transform: translateX(105%);
      transition: transform .25s ease;
      z-index: 1100;
    }
  
    /* 開いた状態（JSが aria-expanded を true にする前提） */
    .menu-toggle[aria-expanded="true"] + nav#nav-primary.nav-drawer{
      transform: translateX(0);
    }
  
    /* メニュー縦並び */
    .site-header .nav-list{
      display:flex;
      flex-direction:column;
      gap: 10px;
    }
  
    .site-header .nav-list a{
      width: 100%;
      justify-content:flex-start;
      padding: 0 14px;
      height: 44px;
      border: 1px solid rgba(15,15,16,.10);
      background: rgba(15,15,16,.02);
    }
    .site-header .nav-list a:hover{
      background: rgba(15,15,16,.05);
    }
  
    /* overlay（nav.jsが hidden を外す前提） */
    .nav-overlay{
      position: fixed;
      inset: 0;
      background: rgba(0,0,0,.26);
      backdrop-filter: blur(2px);
      -webkit-backdrop-filter: blur(2px);
      z-index: 1050;
    }
    .nav-overlay[hidden]{ display:none; }
  }
  
  /* 画面固定時のスクロール禁止（JSで html に nav-open 付与） */
  html.nav-open{
    overflow: hidden;
  }
  
  /* 小さい端末はロゴ少しだけ調整 */
  @media (max-width: 420px){
    .brand-logo{
      height: 34px;
      max-width: 140px;
    }
  }
  
  /* アンカー遷移でヘッダーに隠れない（必要なIDだけ） */
  #thoughts, #origin, #philosophy, #release, #access{
    scroll-margin-top: 96px;
  }
  
  /* =========================================================
     FOOTER (shared)
  ========================================================= */
  .footer{
    background: #0b0c0e;
    color: rgba(255,255,255,.86);
    padding: 56px 0 26px;
    margin-top: 22px;
  }
  
  .footer__grid{
    display:grid;
    grid-template-columns: 1fr 1.6fr;
    gap: 40px;
    align-items:start;
    padding-bottom: 30px;
    border-bottom: 1px solid rgba(255,255,255,.10);
  }
  
  .footer__kicker{
    margin:0 0 12px;
    font-size: 12px;
    letter-spacing:.18em;
    color: rgba(255,255,255,.62);
  }
  
  .footer__logo{
    display:flex;
    align-items:center;
    justify-content:center;
    width: 140px;
    height: 40px;
    border: 1px solid rgba(255,255,255,.18);
    border-radius: 999px;
  }
  
  .footer__logo img{
    max-height: 22px;
    max-width: 130px;
    display:block;
    filter: invert(1);
  }
  
  .footer__cols{
    display:grid;
    grid-template-columns: 1fr 1fr;
    gap: 28px;
  }
  
  .footer__title{
    margin:0 0 12px;
    font-size: 12px;
    letter-spacing:.18em;
    color: rgba(255,255,255,.62);
  }
  
  .footer__line{
    margin: 8px 0;
    font-size: 13px;
    line-height: 1.7;
    color: rgba(255,255,255,.78);
  }
  
  .footer__bottom{
    display:flex;
    align-items:center;
    justify-content:space-between;
    gap: 20px;
    padding-top: 18px;
  }
  
  .footer__small{
    margin:0;
    font-size: 12px;
    color: rgba(255,255,255,.60);
    letter-spacing:.12em;
  }
  
  .footer__sns{
    display:flex;
    gap: 12px;
  }
  
  .footer__sns a{
    width: 34px;
    height: 34px;
    display:inline-flex;
    align-items:center;
    justify-content:center;
    border: 1px solid rgba(255,255,255,.18);
    border-radius: 999px;
    color: rgba(255,255,255,.84);
    text-decoration:none;
    transition: transform .2s ease, background .2s ease, border-color .2s ease;
  }
  
  .footer__sns a:hover{
    transform: translateY(-1px);
    background: rgba(255,255,255,.06);
    border-color: rgba(255,255,255,.24);
  }
  
  @media (max-width: 820px){
    .footer__grid{ grid-template-columns: 1fr; }
    .footer__cols{ grid-template-columns: 1fr; }
  }
  @media (max-width: 900px){

    /* ヘッダー内を中央基準にするための土台 */
    .site-header .container.nav{
      position: relative;
    }
  
    /* ロゴをヘッダー中央に固定 */
    .site-header .brand{
      position: absolute;
      left: 50%;
      top: 50%;
      transform: translate(-50%, -50%);
      height: auto;
      z-index: 2100; /* ボタンより上でOK */
    }
  
    /* 右側のハンバーガーは右端に */
    .menu-toggle{
      margin-left: auto;
    }
  }