/* レイアウト - 左メニューとコンテナ */

/* 全体コンテナ */
.container-with-sidebar {
    display: flex;
    max-width: 1400px;
    margin: 0 auto;
    gap: 2rem;
}

/* 左サイドバーメニュー */
.sidebar-menu {
    width: 320px;
    flex-shrink: 0;
    position: fixed;
    top: 0;
    left: 0;
    bottom: 0;
    overflow-y: auto;
    padding: 2rem 1rem;
    background-color: #fff;
    border: none;
    border-right: 1px solid #000;
    z-index: 1000;
    will-change: transform;
}

.sidebar-header {
    font-size: 1.1rem;
    margin-bottom: 1rem;
    padding-bottom: 0.5rem;
    margin-bottom: 2rem;
    padding-bottom: 0.5rem;
    border-bottom: 2px solid #000;
}

.sidebar-nav {
    list-style: none;
    padding: 0;
    margin: 0;
}

.sidebar-nav>li {
    margin-bottom: 0.5rem;
}

/* メインメニュー項目（h2レベル） */
.sidebar-nav>li>a {
    display: block;
    padding: 0.6rem 0.75rem;
    color: #333;
    text-decoration: none;
    border-left: 3px solid transparent;
    transition: all 0.2s ease;
    font-weight: bold;
    font-size: 0.9rem;
}

.sidebar-nav>li>a:hover {
    background-color: transparent;
    text-decoration: underline;
}

.sidebar-nav>li>a:active,
.sidebar-nav>li>a:focus {
    background-color: transparent;
    text-decoration: underline;
}

/* サブメニュー（h3レベル） */
.sidebar-nav .submenu {
    list-style: none;
    padding: 0;
    margin: 0.3rem 0 0.5rem 1rem;
}

.sidebar-nav .submenu li {
    margin-bottom: 0.3rem;
}

.sidebar-nav .submenu a {
    display: block;
    padding: 0.4rem 0.75rem;
    color: #555;
    text-decoration: none;
    border-left: 2px solid transparent;
    transition: all 0.2s ease;
    font-size: 0.85rem;
    font-weight: normal;
}

.sidebar-nav .submenu a:hover {
    background-color: #e9e9e9;
    border-left-color: #999;
    color: #333;
}

/* 現在位置ハイライト */
.sidebar-nav>li>a.active {
    background-color: transparent;
    font-weight: bold;
    text-decoration: underline;
}

.sidebar-nav .submenu a.active {
    background-color: transparent;
    color: #000;
    font-weight: bold;
    text-decoration: underline;
}

/* メインコンテンツエリア */
.main-content {
    margin-left: 340px;
    padding: 2rem 3rem;
    flex: 1;
    min-width: 0;
}