.page-header {
    display: flex;
    align-items: center;
    justify-content: space-between;

    height: 60px;
    padding: 0 10px;
    background-color: #ffffff;
    border-bottom: 1px solid #ddd;
    box-sizing: border-box;
}

/* 左：ロゴ */
.header-left {
    display: flex;
    align-items:center;
}

.header-home {
    display: flex;
    align-items: center;
    color: inherit;
    text-decoration: none;
}

.header-logo {
    width: 120px;
    flex-shrink: 0;
}

.header-logo img {
    display: block;
    max-height: 52px;
    width: 130px;
}

.site-title {
    color: #1b348a;
    font-size: medium;
    margin-left: 20px;
}

/* 右：ユーザー */
.header-user {    
    position: relative;
    /* width: 111px; */
    align-items: center;
}

.user-button {
    display: flex;
    align-items: center;
    gap: 14px;

    padding: 4px 10px;
    border: 1px solid gray;
    color: steelblue;
    background: white;

    cursor: pointer;
}

.user-button:hover {
    background-color: #f5f5f5;
}

.user-name {
    font-size: 14px;
    white-space: nowrap;
}

.user-arrow {
    margin-left: 5px;
    font-size: 24px;
}

/* ドロップダウン */
.user-menu {
    display: none;
    position: absolute;
    top: 100%;
    right: 0;
    min-width: 150px;
    margin-top: 5px;
    background: #fff;
    border: 1px solid #ddd;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.15);
    z-index: 1000;
}

.user-menu.is-open {
    display: block;
}

.logout-button {
    width: 100%;
    padding: 10px 15px;
    border: 0;
    background: #fff;
    text-align: left;
    cursor: pointer;
}

.logout-button:hover {
    background-color: #eafdff;
}

/* ========================================
   menu
   ======================================== */

.menu {
    display: flex;
    justify-content: flex-start;
    list-style: none;
    padding-inline-start: 20px;
    margin-top: 0px;
    margin-bottom: 0px;
}

.menu > li {
    position: relative;
    text-align: center;
    width: 200px;

}

.menu > li > a {
    display: block;
    padding: 12px 30px;
    color: #fff;
    text-decoration: none;
}

.menu > li > a:hover{
    background-color: #0c7bbb;
}

.main-nav {
    width: 100%;
    background-color:  #1b348a;
    border-bottom: 1px solid #ddd;
    text-align: left;
}
/* ========================================
   ドロップダウン
   ======================================== */

.nav-dropdown-menu {
    display: none;

    position: absolute;
    top: 100%;
    left: 0;

    width: 100%;
    min-width: 0;

    margin: 0;
    padding: 0;

    list-style: none;
    background-color: #fff;
    border: 1px solid #ddd;
    box-sizing: border-box;
    z-index: 1000;
}

.nav-dropdown-menu a {
    display: block;
    color: #333;
    padding: 10px 15px;
    text-decoration: none;
    text-align: left;
}

.nav-dropdown-menu a:hover {
    background-color: #eafdff;
}

.nav-dropdown:hover .nav-dropdown-menu {
    display: block;
}

/* ========================================
   breadcrumb
   ======================================== */
.breadcrumb {
    font-size: 13px;
    margin-left: 20px;
}

.breadcrumb a {
    color: blue;   
    text-decoration: none;
}

.breadcrumb a:hover {
    text-decoration: underline;
    background-color: #eafdff;
}
/* ========================================
   ページタイトル
   ======================================== */
.page-title {
    margin: 0 0 30px;
    font-size: 24px;
    text-align: center;

}
/* ========================================
   Responsive
   ======================================== */

@media (max-width: 900px) {

    .site-title {
        font-size: 14px;
    }

    .user-button {
        gap: 6px;
        padding: 4px 6px;
    }

    .menu > li {
        width: auto;
        min-width: 140px;
    }

    .menu > li > a {
        padding: 12px 18px;
    }
}

@media (max-width: 600px) {

    .page-header {
        height: auto;
        min-height: 60px;
    }

    .site-title {
        display: none;
    }

    .menu > li {
        flex-shrink: 0;
        width: auto;
        min-width: 120px;
    }

    .hamburger-button {
        width: 44px;
        height: 44px;
        font-size: 28px;
    }

    .nav-dropdown-menu a {
        font-size: 14px;
        padding: 10px 10px;
    }
}