/* 文件：wwwroot/css/navmenu.css (主題配色 + 折疊功能) */

/* 0. 核心佈局變量和折疊動畫 */
:root {
    --sidebar-base-width: 250px;
    --sidebar-collapsed-width: 60px;
}

/* 1. 布局核心：CSS Grid */
.page-grid {
    display: grid;
    grid-template-columns: var(--sidebar-width, var(--sidebar-base-width)) 1fr;
    grid-template-rows: 60px 1fr;
    height: 100vh;
    transition: grid-template-columns 0.3s ease-in-out;
}

/* 完全隱藏側邊欄 */
.page-grid.collapse-sidebar {
    --sidebar-width: 0px;
}

/* 2. Header (三欄佈局) */
.header {
    grid-column: 1 / 3;
    grid-row: 1;
    z-index: 1000;
    background-color: var(--theme-header-bg, #2c3e50);
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
}

.header .top-row.header-navbar {
    display: flex;
    justify-content: space-between;
    width: 100%;
    height: 60px;
    padding: 0 0.5rem; /* 左右內距，防止內容被裁切 */
    align-items: center;
    background-color: var(--theme-header-bg, #2c3e50);
    color: var(--theme-header-text, #ffffff);
    box-sizing: border-box;
}

/* 3. Header 內部 Flexbox 結構 */
.header-left-section {
    display: flex;
    align-items: center;
    width: 250px;
    flex-shrink: 0;
    transition: width 0.3s ease-in-out;
    overflow: hidden;
    background-color: var(--theme-header-bg, #2c3e50);
    height: 100%;
    padding: 0;
    margin: 0;
}

.header-left-section .header-logo {
    color: var(--theme-header-text, #ffffff);
    text-decoration: none;
    display: flex;
    align-items: center;
    margin: 0 !important;
    padding: 0 !important;
}

/* 修正 Logo 圖片/文本的間距和對齊 */
.header-left-section .header-logo-image {
    height: 40px;
    margin-right: 10px;
}

.header-left-section .header-logo-text {
    color: var(--theme-header-text, #ffffff);
    font-weight: bold;
    white-space: nowrap;
}

.header .header-toggle-btn {
    margin-right: 0.5rem; /* 右側留白，防止被裁切 */
    background-color: transparent !important;
    border: none;
    color: var(--theme-header-text, #ffffff);
    z-index: 10002 !important;
    cursor: pointer;
    padding: 0.5rem;
    flex-shrink: 0; /* 防止按鈕被壓縮 */
}

.header .header-toggle-btn i {
    font-size: 1.5rem;
    color: var(--theme-header-text, #ffffff);
}

/* 5. 側邊欄區域 */
.sidebar-area {
    grid-column: 1;
    grid-row: 2;
    background-color: var(--theme-sidebar-bg, #2c3e50);
    overflow-y: auto;
    position: relative;
    overflow-x: hidden;
}

/* 導航群組 */
.nav-group {
    width: 100%;
    box-sizing: border-box;
}

/* 6. 主要內容區域 */
.content-area {
    grid-column: 2;
    grid-row: 2;
    overflow-y: auto;
    overflow-x: hidden; /* 防止水平滾動 */
    padding-top: 1.1rem;
    background-color: var(--theme-content-bg, #f8f9fa);
}

/* 內容區域的子元素也要防止溢出 */
.content-area .content {
    max-width: 100%;
    overflow-x: hidden;
}

/* 7. 菜單連結樣式 */
.nav-link {
    color: var(--theme-sidebar-text, #ecf0f1) !important;
    text-align: left;
    white-space: nowrap;
    overflow: hidden;
}

.nav-link:hover {
    background-color: var(--theme-sidebar-hover-bg, #34495e) !important;
    color: var(--theme-header-text, #ffffff) !important;
}

/* 8. 活躍連結樣式 */
.nav-link.active {
    background-color: var(--theme-nav-active-bg, #1abc9c) !important;
    color: var(--theme-nav-active-text, #ffffff) !important;
    font-weight: bold;
    border-radius: 0 !important;
    box-shadow: none !important;
}

/* 9. 折疊狀態下的文字隱藏 */
.page-grid.collapse-sidebar .header-left-section .header-logo-text,
.page-grid.collapse-sidebar .nav-group-title,
.page-grid.collapse-sidebar .user-info,
.page-grid.collapse-sidebar .nav-link span:not(.oi) {
    display: none !important;
    width: 0 !important;
    opacity: 0;
    transition: opacity 0.3s ease-in-out;
}

.page-grid.collapse-sidebar .oi {
    margin: 0 auto !important;
}


/* 10. 右側連結區域 */
.header-right-section {
    display: flex;
    align-items: center;
    gap: 1.5rem; /* 登出與 About 之間的間距 */
    padding-right: 1.5rem; /* 右側留白 */
}

.header-right-section .logout-link,
.header-right-section .about-link {
    color: var(--theme-header-text, #ffffff) !important;
    text-decoration: none;
    font-weight: bold;
}

/* 11. 中間標題樣式 */
.header-center-section {
    flex-grow: 1;
    text-align: center;
    color: var(--theme-header-text, #ffffff);
    font-size: 1.5rem;
    font-weight: 600;
}

/* 12. 群組標題 (按鈕) */
.nav-group-toggle {
    all: unset;
    display: flex;
    align-items: center;
    width: 100%;
    cursor: pointer;
    background-color: var(--theme-sidebar-bg, #2c3e50);
    color: var(--theme-header-text, #ffffff) !important;
    font-weight: bold;
    padding: 0.75rem 1rem;
    padding-right: 1rem; /* 確保右側箭頭有足夠空間 */
    justify-content: flex-start !important;
    box-sizing: border-box;
    overflow: visible; /* 確保內容不被截斷 */
}

.nav-group-toggle:hover {
    background-color: var(--theme-sidebar-hover-bg, #34495e) !important;
}

/* 13. 群組標題的文本部分 */
.nav-group-title {
    margin-left: 12px;
    text-align: left !important;
    font-weight: 700;
    flex-grow: 1; /* 讓標題填滿中間空間 */
    margin-right: 0.5rem;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

/* 14. 群組內容 (折疊/展開) */
.nav-group-content {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease-out;
}

.nav-group-content.expanded {
    max-height: 2000px;
    transition: max-height 0.3s ease-in;
}

/* 15. 群組內容中的子連結 */
.nav-group-item {
    display: block !important;
    width: 100%;
    padding: 0.75rem 3.5rem !important;
    text-align: left !important;
    background-color: var(--theme-nav-group-bg, #253340);
    color: var(--theme-nav-group-text, #b0c4de) !important;
}

.nav-link.nav-group-item:hover {
    background-color: var(--theme-sidebar-hover-bg, #34495e) !important;
    color: var(--theme-header-text, #ffffff) !important;
}

/* 16. 用戶信息區塊 */
nav.flex-column .user-info {
    color: var(--theme-header-text, #ffffff);
    padding: 1rem 1.5rem;
    white-space: nowrap;
    overflow: hidden;
    width: 100%;
    font-size: 1rem;
    font-weight: bold;
    background-color: var(--theme-sidebar-user-bg, #34495e);
}

nav.flex-column .user-info .user-icon-img {
    height: 30px;
    width: auto;
    margin-right: 15px;
    filter: var(--theme-icon-filter, invert(100%));
}

/* 17. 導航圖標 */
.nav-icon-img {
    width: 1.2rem;
    height: 1.2rem;
    vertical-align: middle;
    margin-right: 0.5rem;
    filter: var(--theme-icon-filter, invert(100%));
}

.nav-icon-group-img {
    width: 1.5rem;
    height: 1.5rem;
    vertical-align: middle;
    margin-right: 0.5rem;
    filter: var(--theme-icon-filter, invert(100%));
}

/* 17.1 群組 Bootstrap Icon 圖示 */
.nav-icon-group-bi {
    font-size: 1.25rem;
    vertical-align: middle;
    margin-right: 0.5rem;
    color: var(--theme-nav-group-text, #b0c4de);
}

/* 18. 群組圖標箭頭 */
.nav-group-icon {
    margin-left: auto;
    flex-shrink: 0; /* 防止箭頭被壓縮 */
    min-width: 1.2rem; /* 確保最小寬度 */
}

/* 19. 回首頁漂浮按鈕 */
.fab-home-container {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    z-index: 1050;
}

.fab-home {
    width: 56px;
    height: 56px;
    border-radius: 50% !important;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    transition: transform 0.2s ease, box-shadow 0.2s ease;
    text-decoration: none;
}

.fab-home:hover {
    transform: scale(1.1);
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.3) !important;
}

.fab-home:active {
    transform: scale(0.95);
}

/* 20. 主題切換按鈕 */
.theme-toggle-btn {
    all: unset;
    display: block !important; /* 與 nav-group-item 相同 */
    width: 100%;
    padding: 0.75rem 3.5rem !important; /* 與 nav-group-item 相同 */
    text-align: left !important;
    background-color: var(--theme-nav-group-bg, #253340);
    color: var(--theme-nav-group-text, #b0c4de) !important;
    cursor: pointer;
    transition: background-color 0.2s ease, color 0.2s ease;
    box-sizing: border-box;
    border: none;
}

.theme-toggle-btn:hover {
    background-color: var(--theme-sidebar-hover-bg, #34495e) !important;
    color: var(--theme-header-text, #ffffff) !important;
}

.theme-toggle-btn:focus {
    outline: none;
}

.theme-toggle-btn i {
    width: 1.2rem;
    display: inline-block;
    text-align: center;
    margin-right: 0.5rem; /* 與 nav-icon-img 相同 */
    vertical-align: middle;
}

/* =============================================
   21. 響應式設計 (RWD)
   ============================================= */

/* --- 平板 (768px - 991px) --- */
@media (max-width: 991px) {
    .header-left-section {
        width: 200px;
    }

    .header-center-section {
        font-size: 1.2rem;
    }

    .header-right-section {
        gap: 1rem;
        padding-right: 1rem;
    }
}

/* --- 手機 (< 768px) --- */
@media (max-width: 767px) {
    /* 改為單欄佈局 */
    .page-grid {
        grid-template-columns: 1fr;
        grid-template-rows: 60px 1fr;
    }

    /* 側邊欄變成覆蓋式選單 */
    .sidebar-area {
        position: fixed;
        top: 60px;
        left: 0;
        width: 280px;
        height: calc(100vh - 60px);
        z-index: 1001;
        transform: translateX(-100%);
        transition: transform 0.3s ease-in-out;
        box-shadow: 2px 0 10px rgba(0, 0, 0, 0.3);
    }

    /* 側邊欄展開時 (非收攏狀態) */
    .page-grid:not(.collapse-sidebar) .sidebar-area {
        transform: translateX(0);
    }

    /* 收攏時隱藏側邊欄 */
    .page-grid.collapse-sidebar .sidebar-area {
        transform: translateX(-100%);
    }

    /* 內容區域全寬 */
    .content-area {
        grid-column: 1;
    }

    /* Header 左側區域調整 */
    .header-left-section {
        width: auto;
        flex-shrink: 1;
        padding-left: 0.5rem;
    }

    .header-left-section .header-logo-image {
        height: 32px;
    }

    /* 中間標題縮小 */
    .header-center-section {
        font-size: 1rem;
        padding: 0 0.5rem;
        overflow: hidden;
        text-overflow: ellipsis;
        white-space: nowrap;
    }

    /* 右側連結調整 */
    .header-right-section {
        gap: 0.75rem;
        padding-right: 0.75rem;
        font-size: 0.9rem;
    }

    /* 漂浮按鈕調整 */
    .fab-home-container {
        bottom: 1rem;
        right: 1rem;
    }

    .fab-home {
        width: 48px;
        height: 48px;
        font-size: 1.2rem;
    }

    /* 遮罩層 (點擊關閉選單) */
    .sidebar-overlay {
        display: none;
        position: fixed;
        top: 60px;
        left: 0;
        right: 0;
        bottom: 0;
        background-color: rgba(0, 0, 0, 0.5);
        z-index: 1000;
    }

    .page-grid:not(.collapse-sidebar) .sidebar-overlay {
        display: block;
    }
}

/* --- 小手機 (< 480px) --- */
@media (max-width: 479px) {
    .header-center-section {
        font-size: 0.9rem;
    }

    .header-right-section .about-link {
        display: none; /* 隱藏 About 連結，節省空間 */
    }

    .sidebar-area {
        width: 100%; /* 全寬側邊欄 */
    }
}