html {
    /* スクロールバー有無でレイアウトが左右に揺れないようにする */
    scrollbar-gutter: stable both-edges;
}

.visually-hidden {
    position: absolute !important;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    --color-nav: #334155;
    white-space: nowrap;
    border: 0;
}

.nav-icon {
    width: 16px;
    height: 16px;
    display: inline-block;
    vertical-align: middle;
    flex: 0 0 auto;
    object-fit: contain;
}

.nav-icon-history {
    width: 21px;
    height: 21px;
}

.nav-icon-type {
    width: 19.2px;
    height: 19.2px;
}

.site-footer {
    margin-top: var(--space-6);
    padding: 0 0 var(--space-4);
    color: var(--color-text-muted);
    font-size: 0.75rem;
    line-height: 1.5;
}

.site-footer-inner {
    width: min(100% - 32px, 1200px);
    margin: 0 auto;
}

.site-footer a {
    color: var(--color-primary);
}

@media (max-width: 760px) {
    .site-footer {
        padding-bottom: var(--space-3);
    }

    .site-footer-inner {
        width: calc(100% - 24px);
    }
}

/* 共通ヘッダースタイル: テンプレートごとの差分を統一するためにここで定義します */
.navbar {
    margin-bottom: var(--space-6);
    padding: var(--space-4) 0;
    color: #fff;
    background: var(--color-nav);
    box-shadow: var(--shadow-1);
}

.navbar .container {
    width: min(100% - 32px, 1200px);
    margin: 0 auto;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--space-4);
}

.navbar-brand {
    font-size: 1.125rem;
    font-weight: 700;
    letter-spacing: 0.02em;
}

.responsive-label-full {
    display: inline;
}

.responsive-label-short {
    display: none;
}

@media (max-width: 576px) {
    .responsive-label-full {
        display: none;
    }

    .responsive-label-short {
        display: inline;
    }
}

body.sidebar-layout {
    padding-left: 180px;
}

body.sidebar-layout .navbar {
    position: fixed;
    inset: 0 auto 0 0;
    width: 180px;
    margin-bottom: 0;
    padding: var(--space-5) var(--space-4);
    z-index: 1030;
}

body.sidebar-layout .navbar .container {
    width: 100%;
    min-height: 100%;
    margin: 0;
    flex-direction: column;
    align-items: stretch;
    justify-content: flex-start;
}

body.sidebar-layout .navbar-brand {
    padding-bottom: var(--space-4);
    border-bottom: 1px solid rgba(255, 255, 255, 0.12);
}

body.sidebar-layout .sidebar-nav-actions {
    display: flex;
    flex-direction: column;
    align-items: stretch;
    gap: var(--space-2);
}

body.sidebar-layout .sidebar-nav-actions .btn,
body.sidebar-layout .sidebar-nav-actions form {
    width: 100%;
}

body.sidebar-layout .sidebar-nav-actions form .btn {
    width: 100%;
}

@media (max-width: 576px) {
    body.sidebar-layout .navbar-brand {
        padding-bottom: var(--space-3);
    }

    body.sidebar-layout {
        padding-left: 150px !important;
    }

    body.sidebar-layout .navbar {
        width: 150px !important;
        padding: var(--space-4) var(--space-3);
    }

    body.sidebar-layout .sidebar-nav-actions {
        gap: var(--space-1);
    }

    body.sidebar-layout .sidebar-nav-actions .btn {
        font-size: 0.75rem;
        min-height: 36px;
        padding: 0 var(--space-2);
    }
}

/* 小画面ではサイドバー（左固定）レイアウトを解除してトップナビに切り替える */
@media (max-width: 760px) {
    body.sidebar-layout {
        padding-left: 0 !important;
    }

    /* ナビバーを左固定から通常の上部ナビに戻す */
    body.sidebar-layout .navbar {
        position: relative !important;
        inset: auto !important;
        width: 100% !important;
        margin-bottom: var(--space-4);
        padding: var(--space-3) var(--space-3) !important;
    }

    body.sidebar-layout .navbar .container {
        min-height: auto;
        margin: 0 auto;
        flex-direction: row;
        align-items: center;
        justify-content: space-between;
    }

    body.sidebar-layout .navbar-brand {
        padding-bottom: 0;
        border-bottom: none;
    }

    /* 操作用ボタン群を横並びにして幅を自動にする */
    body.sidebar-layout .sidebar-nav-actions {
        display: flex;
        flex-direction: row;
        align-items: center;
        gap: var(--space-2);
    }

    body.sidebar-layout .sidebar-nav-actions .btn,
    body.sidebar-layout .sidebar-nav-actions form {
        width: auto;
    }
}