/* global-nav.css */
.nav-logo{flex:0 0 auto;padding:0 20px;}
.nav-logo img {width: 100px;height: auto;}
.tab-menu-section{display:flex;align-items:center;background:#fff;position:relative;}
.tab-menu{display:flex;flex:1;justify-content:center;list-style:none;margin:0;padding:0;border-bottom:2px solid #005bac;}
.tab-item{margin:0 12px;}
.tab-item a{display:block;padding:12px 16px;font-family:'Noto Serif JP',serif;font-weight:bold;color:#005bac;border:1px solid transparent;border-bottom:none;border-radius:4px 4px 0 0;}
.tab-item.active a{background:#005bac;color:#fff;border-color:#005bac;}
.hamburger{display:none;position:absolute;top:12px;right:20px;font-family:'Noto Serif JP',serif;font-size:1.6em;cursor:pointer;color:#005bac;user-select:none;}
.tab-menu-section {
  display: flex;
  align-items: center;
  background: #fff;
  position: relative;    /* ← 必須 */
  z-index: 10;           /* ← 大きい値で前面へ */
}
@media(max-width:768px){
  .tab-menu{display:none;}
  .hamburger{display:block;}
  .tab-menu.open{display:flex;flex-direction:column;position:absolute;top:100%;left:0;width:100%;background:#f9f9f9;border-bottom:2px solid #005bac;z-index:10;}
  .tab-item{margin:0;}
  .tab-item a{padding:12px 20px;}
}