:root {
    /* ライトモードの変数 (初期値) */
    --color-bg-primary: #f4f7f9;
    --color-bg-secondary: #ffffff;
    --color-text-primary: #2c3e50;
    --color-text-secondary: #7f8c8d;
    --color-accent: #3498db; /* メインカラー */
    --color-shadow: rgba(0, 0, 0, 0.1);
    --color-grid-border: rgba(0, 0, 0, 0.1);
    --sidebar-width-full: 250px;
    --sidebar-width-min: 80px;
}

/* ダークモードへの切り替え */
body.dark-mode {
    --color-bg-primary: #1e272e;
    --color-bg-secondary: #2c3a47;
    --color-text-primary: #ecf0f1;
    --color-text-secondary: #bdc3c7;
    --color-accent: #3498db;
    --color-shadow: rgba(0, 0, 0, 0.4);
    --color-grid-border: rgba(255, 255, 255, 0.1);
}

* {
    box-sizing: border-box;
}

body {
    min-height: 100vh;
    background-color: var(--color-bg-primary);
    color: var(--color-text-primary);
    transition: background-color 0.3s, color 0.3s;
    font-family: "Raleway", "Helvetica Neue", "Helvetica", "Arial", sans-serif;
}

/* HタグとLabelタグへのカラー強制適用 */
#main-content h1, #main-content h2, #main-content h3,
#main-content h4, #main-content h5, #main-content h6,
#main-content label {
    color: var(--color-text-primary) !important;
    margin-top: 0;
    margin-bottom: 0;
}

/* --- 1. サイドバー (#sidebar) --- */
#sidebar {
    width: var(--sidebar-width-full);
    background-color: var(--color-bg-secondary);
    padding: 0;
    box-shadow: 2px 0 5px var(--color-shadow);
    z-index: 100;
    position: fixed;
    top: 0;
    left: 0;
    height: 100vh;
    transition: width 0.3s ease, margin-left 0.3s ease;
    display: flex;
    flex-direction: column;
}

body.loading #sidebar,
body.loading #main-content {
    opacity: 0;
}

body:not(.loading) #sidebar,
body:not(.loading) #main-content {
    opacity: 1;
    transition: width 0.3s ease, margin-left 0.3s ease, opacity 0.3s 0.1s;
}


/* ミニマルモード時の幅 */
body.minimized #sidebar {
    width: var(--sidebar-width-min);
    overflow-x: hidden;
}

#sidebar .sidebar-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0 15px;
    border-bottom: 1px solid var(--color-grid-border);
    height: 65px; /* 高さを固定 */
    flex-shrink: 0;
}

#sidebar .logo {
    display: flex;
    align-items: baseline;
    font-size: 20px;
    font-weight: 700;
    color: var(--color-accent);
    overflow: hidden;
    white-space: nowrap;
    transition: opacity 0.3s, width 0.3s;
}
#sidebar .logo .logo-el { font-size: 26px; font-weight: 900; color: #e74c3c; margin-right: 2px; }
#sidebar .logo .logo-storage { font-weight: 900; color: var(--color-accent); letter-spacing: 0.5px; }

#sidebar #menu-toggle {
    background: none;
    border: none;
    color: var(--color-text-primary);
    font-size: 24px;
    cursor: pointer;
    padding: 10px;
    margin: 0;
}

body.minimized #sidebar .sidebar-header {
    justify-content: center;
}

body.minimized #sidebar .logo {
    opacity: 0;
    width: 0;
}


/* メニュー項目 */
#sidebar nav {
    flex-grow: 1;
    overflow-y: auto;
}

#sidebar nav ul { list-style: none; margin: 0; padding: 0; }
#sidebar nav li {
    padding: 0;
    white-space: nowrap;
    position: relative;
    border-left: 5px solid transparent;
    margin: 0;
}

#sidebar nav li > a,
#sidebar nav li.has-submenu > a {
    padding: 15px 20px;
    text-decoration: none;
    display: flex;
    align-items: center;
    width: 100%;
    color: var(--color-text-primary);
    transition: background-color 0.2s;
    position: relative;
}
#sidebar nav li.has-submenu > a { cursor: pointer; justify-content: space-between; }

body.minimized #sidebar nav li > a span,
body.minimized #sidebar nav li.has-submenu > a span { display: none; opacity: 0; }

#sidebar nav li > a:hover, #sidebar nav li.has-submenu > a:hover { background-color: var(--color-accent); color: #ffffff; }
#sidebar nav li.active > a { background-color: rgba(52, 152, 219, 0.15); color: var(--color-text-primary); }
body.dark-mode #sidebar nav li.active > a { background-color: rgba(52, 152, 219, 0.25); }
#sidebar nav li.active { border-left-color: var(--color-accent); }

#sidebar .submenu { list-style: none; padding: 0; margin: 0; background-color: rgba(127, 140, 141, 0.05); overflow: hidden; }
#sidebar .submenu li a {
    padding: 10px 20px 10px 50px;
    font-size: 14px;
    color: var(--color-text-secondary);
    text-decoration: none;
    display: block;
}

body.minimized .submenu li a { display: none; }

body.minimized #sidebar nav li[data-title]:hover::after {
    content: attr(data-title);
    position: fixed;
    left: calc(var(--sidebar-width-min) + 5px);
    top: 50%;
    transform: translateY(-50%);
    background-color: var(--color-text-primary);
    color: var(--color-bg-secondary);
    padding: 5px 10px;
    border-radius: 4px;
    font-size: 14px;
    opacity: 0; visibility: hidden; pointer-events: none;
    transition: opacity 0.3s, visibility 0.3s; z-index: 1000;
}
body.minimized #sidebar nav li[data-title]:hover::after { opacity: 1; visibility: visible; }

/* --- 2. メインコンテンツとヘッダー --- */
#main-content {
    flex-grow: 1;
    padding: 30px;
    margin-left: var(--sidebar-width-full);
    width: auto;
    /* ★修正: #loading-overlayの基準とするため追加 */
    position: relative;
    transition: margin-left 0.3s ease;
}

body.minimized #main-content { margin-left: var(--sidebar-width-min); }

#main-content #header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-bottom: 20px;
    border-bottom: 1px solid var(--color-text-secondary);
    margin-bottom: 30px;
}
#main-content .header-left, #main-content .header-actions { display: flex; align-items: center; }

#main-content .header-actions .user-info p {
    margin: 0;
}

#responsive-menu-toggle {
    display: none; /* PCでは非表示 */
    background: none;
    border: none;
    color: var(--color-text-primary);
    font-size: 24px;
    cursor: pointer;
    margin-right: 15px;
}

#sidebar .submenu {
    list-style: none;
    padding: 0;
    margin: 0;
    background-color: rgba(127, 140, 141, 0.05);
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease-in-out;
}

#sidebar .has-submenu.open > .submenu {
    max-height: 500px; /* 必要に応じて調整 */
}

#sidebar .has-submenu > a .submenu-icon {
    transition: transform 0.3s ease;
}
#sidebar .has-submenu.open > a .submenu-icon {
    transform: rotate(180deg);
}

#header .header-actions #mode-toggle {
    background: none !important; border: none !important;
    color: var(--color-text-primary) !important; font-size: 20px !important;
    cursor: pointer !important; margin: 0 15px 0 0 !important;
    padding: 0 !important; height: auto !important; min-height: 0 !important;
    width: auto !important; line-height: 1 !important; transition: color 0.2s;
    box-shadow: none !important;
}
#header .header-actions #mode-toggle:hover { color: var(--color-accent) !important; opacity: 1 !important; }

/* --- 3. カード、フォーム、その他 --- */
#main-content .card {
    background-color: var(--color-bg-secondary);
    padding: 25px;
    border-radius: 12px;
    box-shadow: 0 4px 12px var(--color-shadow);
    margin-bottom: 20px;
}

.primary-btn, .secondary-btn {
    padding: 10px 20px !important; font-size: 16px !important;
    border-radius: 6px !important; cursor: pointer !important;
    border: none !important; transition: opacity 0.2s !important;
    text-transform: none !important; line-height: normal !important;
    height: auto !important;
}
.primary-btn { background-color: var(--color-accent) !important; color: white !important; }
.secondary-btn { background-color: var(--color-text-secondary) !important; color: var(--color-bg-secondary) !important; }
.primary-btn:hover, .secondary-btn:hover { opacity: 0.9 !important; }

#main-content input:not([type="checkbox"]):not([type="radio"]),
#main-content select,
#main-content textarea {
    padding: 10px 12px !important; border: 1px solid var(--color-grid-border) !important;
    border-radius: 6px !important; background-color: var(--color-bg-secondary) !important;
    color: var(--color-text-primary) !important; font-size: 16px !important;
    width: 100% !important; line-height: normal !important;
    margin-bottom: 10px !important;
}
#main-content input:focus, #main-content select:focus, #main-content textarea:focus {
    border-color: var(--color-accent) !important;
    box-shadow: 0 0 0 2px rgba(52, 152, 219, 0.3) !important;
    outline: none !important;
}

/* スピナーはそのまま使用 */
.spinner {
    width: 40px; height: 40px; border: 4px solid var(--color-grid-border);
    border-top-color: var(--color-accent); border-radius: 50%;
    animation: spin 0.8s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* ★修正: #main-content内のローディングオーバーレイとしてスタイルを再定義 */
#loading-overlay {
    position: absolute; /* fixed から absolute に変更 */
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    /* background-color: var(--color-bg-primary); はそのまま使用 */
    background-color: var(--color-bg-primary);
    z-index: 9999;
    display: none; /* JavaScriptで制御するため、初期は非表示 */
    justify-content: center;
    align-items: center;
    /* SPAローディングにはJS制御のdisplay: none/flexを使用するため、opacity/visibilityによる制御は削除 */
    /* transition: opacity 0.5s, visibility 0.5s; を削除 */
}

/* body.loading のローディングロジックはフルスクリーン用のため削除 */
/* body.loading #loading-overlay { opacity: 1; visibility: visible; } */
/* body:not(.loading) #loading-overlay { opacity: 0; visibility: hidden; } */

.dashboard-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
.card.large { grid-column: span 2; }
.card.medium, .card.small { grid-column: span 1; }

#main-content .kpi-budget-group { display: flex; justify-content: space-around; gap: 20px; padding-top: 10px; }
#main-content .kpi-budget-item {
    text-align: center;
    flex-grow: 1;
    padding: 15px;
    border-right: 1px solid var(--color-grid-border);
}
#main-content .kpi-budget-item:last-child { border-right: none; }
#main-content .kpi-label { font-size: 16px; color: var(--color-text-secondary); margin-bottom: 10px; }
#main-content .kpi-sub-value { font-size: 16px; font-weight: bold; color: var(--color-text-primary); margin-top: 5px; }
#main-content .kpi-meter-container { position: relative; width: 300px; height: 150px; margin: 0 auto 5px auto; }
#main-content .kpi-meter-container .kpi-meter-value {
    position: absolute; top: 0; left: 50%;
    transform: translate(-50%, 90%);
    font-size: 40px; font-weight: bold; color: var(--color-accent); z-index: 5;
    background-color: var(--color-bg-secondary); padding: 5px 10px; border-radius: 5px;
}
#main-content .trend.up { color: #2ecc71; }
#main-content .chart-container { position: relative; height: 250px; width: 100%; }

#main-content .chart-container-large-plot {
    position: relative;
    height: 500px; /* 高さを500pxに指定 */
    width: 100%;
}
#main-content .chart-container-large-plot canvas {
    height: 100% !important;
    width: 100% !important;
}

#main-content .meter-card { display: flex; flex-direction: column; align-items: center; justify-content: center; text-align: center; }
#main-content .chart-container-half { position: relative; height: 150px; width: 150px; margin: 10px auto; }
#main-content .meter-label { margin-top: -10px; font-size: 18px; font-weight: bold; }
.meter-label .percent { color: var(--color-accent); font-size: 24px; }
.meter-label .target { font-size: 14px; color: var(--color-text-secondary); font-weight: normal; }

/* --- 9. レスポンシブ対応 --- */
@media (max-width: 1080px) {
    /* --- レイアウト調整 --- */
    .dashboard-grid { grid-template-columns: 1fr; }
    .card.large, .card.medium, .card.small { grid-column: span 1; }
    .kpi-budget-group { flex-direction: column; }
    .kpi-budget-item {
        border-right: none;
        border-bottom: 1px solid var(--color-grid-border);
        padding-bottom: 20px;
        margin-bottom: 20px;
    }
    .kpi-budget-item:last-child { border-bottom: none; padding-bottom: 0; margin-bottom: 0; }

    /* --- ナビゲーションの挙動を修正 --- */
    body { overflow-x: hidden; }
    #main-content {
        margin-left: 0 !important;
        /* headerがfixedになったため、padding-topで調整 */
        padding-top: 80px;
    }

    #main-content #header {
        position: fixed;
        top: 0;
        left: 0;
        /* サイドバーが消えるため、幅を100%に */
        width: 100%;
        z-index: 99;
        background-color: var(--color-bg-primary);
        margin-bottom: 0;
        padding: 15px;
    }

    #responsive-menu-toggle {
        display: block;
    }

    #sidebar { margin-left: -250px; z-index: 101; }
    body.sidebar-open #sidebar { margin-left: 0; }

    /* PC用のヘッダーとメニューボタンは非表示 */
    #sidebar .sidebar-header {
        display: none;
    }

    #sidebar nav {
        padding-top: 20px;
    }

    #sidebar nav li > a, #sidebar nav li.has-submenu > a {
        padding-top: 18px;
        padding-bottom: 18px;
    }
}

.chat-container {
    border-radius: 8px;
    overflow: hidden;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.chat-panel {
    overflow-y: auto;
    padding: 15px;
    background-color: #f7f7f7;
    border: none;
}

.chat-box {
    width: 100%;
}

.message {
    margin-bottom: 15px;
    padding: 10px;
    border-radius: 10px;
    max-width: 80%;
    word-wrap: break-word;
    box-shadow: 0 1px 1px rgba(0,0,0,0.05);
    position: relative;
    font-size: 14px;
    clear: both; /* 左右のメッセージを分離 */
}

.user-message {
    background-color: #dcf8c6; /* ユーザーのメッセージは薄い緑 */
    float: right;
    margin-left: auto;
    border-bottom-right-radius: 2px;
}

.system-message {
    background-color: #fff; /* システム（Gemini）のメッセージは白 */
    float: left;
    margin-right: auto;
    border: 1px solid #e5e5e5;
    border-bottom-left-radius: 2px;
}

.message p {
    margin: 0;
    padding: 0;
    line-height: 1.6;
    white-space: pre-wrap; /* 改行を保持 */
}

.timestamp {
    display: block;
    font-size: 10px;
    color: #999;
    margin-top: 5px;
}

.user-message .timestamp {
    text-align: right;
}

.system-message .timestamp {
    text-align: left;
}

.panel-footer {
    padding: 10px 15px;
    background-color: #fff;
    border-top: 1px solid #eee;
}

.panel-footer .input-group {
    width: 100%;
}

/* ローディングインジケーターのスタイル */
.fa-spin {
    margin-right: 5px;
}